Saharman Gea

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Research profile with citations, yearly trend, article performance and author insights

Universitas Sumatera Utara, Indonesia

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Saharman Gea

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Last Synced 15 Jul 2026, 04:25 PM

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Author Impact Score

Custom 3-year author impact calculator based on citations and indexed documents.

29.12

Author impact score

1,456 Citations 2024 - 2026

50 Documents 2024 - 2026

Total Citations

2,921

Scholar + author-added

H-Index

28

research impact

I10-Index

65

quality score

Articles Found

245

merged research works

Top Performing Year

2025

596 citations

Tier

T1

CiteScore rank tier

Author CiteScore

29.12

Upward trend

Avg Citations / Year

174.00

yearly average

Citations / Article

11.92

impact efficiency

Citation Trend

362

Declining trend

Most Cited Article

Investigation into the structural, morp...

310 citations

Smart Insight Box

Auto Summary

Top citation year was 2025 with 596 citations. Average citations per year stand at 174. Each indexed article contributes around 11.92 citations on average. Latest Author Impact Score for 2026 is 29.12, indicating a upward trend. Current H-index is 28 and I10-index is 65. Most cited article currently has 310 citations. Recent yearly citation pattern indicates a declining trend.

Author Impact Score Trend

15 Years

Most Cited

310 Citations

Year: 2011

Investigation into the structural, morphological, mechanical and thermal behaviour of bacterial cellulose after a two-step purification process

S Gea, CT Reynolds, N Roohpour, B Wirjosentono, N Soykeabkaew, ...

Bioresource technology 102 (19), 9105-9110, 2011

Yearly Citations

Author year-wise citation data

Year	Citations
2026	362
2025	596
2024	498
2023	369
2022	274
2021	179
2020	134
2019	91
2018	99
2017	72
2016	41
2015	41
2014	67
2013	44
2012	48
2011	23
2010	20

Yearly Citations Chart

Author citation trend

17 Years

Year-wise Citation Share

Citation percentage by year

Top Research Articles

Showing 20 articles per page

245 Articles Page 1 of 13

#	Article Details	Year
1	Investigation into the structural, morphological, mechanical and thermal behaviour of bacterial cellulose after a two-step purification process Google Scholar 👨‍🔬 S Gea, CT Reynolds, N Roohpour, B Wirjosentono, N Soykeabkaew, ... 📚 Bioresource technology 102 (19), 9105-9110, 2011	2011
2	All-cellulose nanocomposites by surface selective dissolution of bacterial cellulose Google Scholar 👨‍🔬 N Soykeabkaew, C Sian, S Gea, T Nishino, T Peijs 📚 Cellulose 16 (3), 435-444, 2009	2009
3	Bacterial cellulose–poly (vinyl alcohol) nanocomposites prepared by an in-situ process Google Scholar 👨‍🔬 S Gea, E Bilotti, CT Reynolds, N Soykeabkeaw, T Peijs 📚 Materials Letters 64 (8), 901-904, 2010	2010
4	Photocatalytic degradation of methylene blue using N-doped ZnO/carbon dot (N-ZnO/CD) nanocomposites derived from organic soybean Google Scholar 👨‍🔬 DG Ayu, S Gea, Andriayani, DJ Telaumbanua, AFR Piliang, M Harahap, ... 📚 ACS omega 8 (17), 14965-14984, 2023	2023
5	Bioactive bacterial cellulose wound dressings for burns with collagen in-situ and chitosan ex-situ impregnation Google Scholar 👨‍🔬 KM Pasaribu, S Ilyas, T Tamrin, I Radecka, S Swingler, A Gupta, ... 📚 International Journal of Biological Macromolecules 230, 123118, 2023	2023
6	Synthesis, properties, and utilization of carbon quantum dots as photocatalysts on degradation of organic dyes: A mini review Google Scholar 👨‍🔬 AMA Saputra, AFR Piliang, R Goei, RR HTS, S Gea 📚 Catalysis Communications 187, 106914, 2024	2024
7	Characterization of bacterial cellulose-based wound dressing in different order impregnation of chitosan and collagen Google Scholar 👨‍🔬 KM Pasaribu, S Gea, S Ilyas, T Tamrin, I Radecka 📚 Biomolecules 10 (11), 1511, 2020	2020
8	Isolasi dan karakterisasi nanokistral selulosa dari tandan sawit (elaeis guineensis jack) Google Scholar 👨‍🔬 E Putri, S Gea 📚 Elkawnie: Journal of Islamic Science and Technology 4 (1), 13-22, 2018	2018
9	A comprehensive review of experimental parameters in bio-oil upgrading from pyrolysis of biomass to biofuel through catalytic hydrodeoxygenation Google Scholar 👨‍🔬 S Gea, YA Hutapea, AFR Piliang, AN Pulungan, R Rahayu, J Layla, ... 📚 BioEnergy Research 16 (1), 325-347, 2023	2023
10	Isolation and characterisation of cellulose nanofibre and lignin from oil palm empty fruit bunches Google Scholar 👨‍🔬 S Gea, AH Siregar, E Zaidar, M Harahap, DP Indrawan, ... 📚 Materials 13 (10), 2290, 2020	2020
11	Bacterial cellulose‐based biosensors Google Scholar 👨‍🔬 FG Torres, OP Troncoso, KN Gonzales, RM Sari, S Gea 📚 Medical Devices & Sensors 3 (5), e10102, 2020	2020
12	Facile synthesis of ZnO–Ag nanocomposite supported by graphene oxide with stabilised band-gap and wider visible-light region for photocatalyst application Google Scholar 👨‍🔬 S Gea, SA Situmorang, N Pasaribu, AFR Piliang, B Attaurrazaq, RM Sari, ... 📚 journal of materials research and technology 19, 2730-2741, 2022	2022
13	Synthesis Si nanoparticles from rice husk as material active electrode on secondary cell battery with X-Ray diffraction analysis Google Scholar 👨‍🔬 A Daulay, S Gea 📚 South African Journal of Chemical Engineering 42, 32-41, 2022	2022
14	Antimicrobial and antihemolytic properties of a CNF/AgNP-chitosan film: A potential wound dressing material Google Scholar 👨‍🔬 PAZ Hasibuan, M Tanjung, S Gea, KM Pasaribu, M Harahap, ... 📚 Heliyon 7 (10), 2021	2021
15	Biocomposites based on bacterial cellulose and apple and radish pulp Google Scholar 👨‍🔬 S Gea, FG Torres, OP Troncoso, CT Reynolds, F Vilasecca, M Iguchi, ... 📚 International Polymer Processing 22 (5), 497-501, 2007	2007
16	Characteristic and catalytic performance of Co and Co-Mo metal impregnated in sarulla natural zeolite catalyst for hydrocracking of MEFA rubber seed oil into biogasoline fraction Google Scholar 👨‍🔬 JL Sihombing, S Gea, B Wirjosentono, H Agusnar, AN Pulungan, ... 📚 Catalysts 10 (1), 121, 2020	2020
17	Mechanical and thermal properties of bacterial-cellulose-fibre-reinforced Mater-Bi® bionanocomposite Google Scholar 👨‍🔬 H Nainggolan, S Gea, E Bilotti, T Peijs, SD Hutagalung 📚 Beilstein Journal of nanotechnology 4 (1), 325-329, 2013	2013
18	Fabrication and In-Vivo Study of Micro-Colloidal Zanthoxylum acanthopodium-Loaded Bacterial Cellulose as a Burn Wound Dressing Google Scholar 👨‍🔬 KM Pasaribu, S Gea, S Ilyas, T Tamrin, AA Sarumaha, A Sembiring, ... 📚 Polymers 12 (7), 1436, 2020	2020
19	Chitosan/graphene oxide biocomposite film from pencil rod Google Scholar 👨‍🔬 S Gea, JN Sari, R Bulan, A Piliang, SA Amaturrahim, YA Hutapea 📚 Journal of Physics: Conference Series 970 (1), 012006, 2018	2018
20	Synthesis of fluorescent citric acid carbon dots composites derived from empty fruit bunches of palm oil tree and its anti-bacterial property Google Scholar 👨‍🔬 R Pramudita, S Gea, A Daulay, M Harahap, YZ Tan, R Goei, AIY Tok 📚 Case Studies in Chemical and Environmental Engineering 6, 100277, 2022	2022
21	Bacterial cellulose impregnated with andaliman (Zanthoxylum acanthopodium) microencapsulation as diabetic wound dressing Google Scholar 👨‍🔬 S Gea, IB Putra, D Lindarto, KM Pasaribu, Y Saraswati, M Karina, R Goei, ... 📚 International Journal of Biological Macromolecules 253, 126572, 2023	2023
22	Synthesis and application of silicon nanoparticles prepared from rice husk for lithium-ion batteries Google Scholar 👨‍🔬 A Daulay, S Gea 📚 Case Studies in Chemical and Environmental Engineering 6, 100256, 2022	2022
23	Highly fluorescent nitrogen-doped carbon dots derived from jengkol peels (Archindendron pauciflorum) by solvothermal synthesis for sensitive Hg2+ ions detection Google Scholar 👨‍🔬 AS Prayugo, S Gea, A Daulay, M Harahap, J Siow, R Goei, AIY Tok 📚 Biosensors and Bioelectronics: X 14, 100363, 2023	2023
24	The effectiveness of coconut coir as tar adsorbent in liquid smoke integrated into the pyrolysis reactor Google Scholar 👨‍🔬 RM Sari, S Gea, B Wirjosentono, S Hendrana, FG Torres 📚 Case Studies in Thermal Engineering 25, 100907, 2021	2021
25	The preparation of all-cellulose nanocomposite film from isolated cellulose of corncobs as food packaging Google Scholar 👨‍🔬 MZE Sinaga, S Gea, N Panindia, YA Sihombing 📚 Oriental Journal of Chemistry 34 (1), 562, 2018	2018
26	The isolation of nanofibre cellulose from oil palm empty fruit bunch via steam explosion and hydrolysis with HCl 10% Google Scholar 👨‍🔬 S Gea, Z Zulfahmi, D Yunus, A Andriayani, YA Hutapea 📚 Journal of Physics: Conference Series 979 (1), 012063, 2018	2018
27	Analysis and availability of lignocellulosic wastes: Assessments for Indonesia and Peru Google Scholar 👨‍🔬 RM Sari, FG Torres, OP Troncoso, GE De‐la‐Torre, S Gea 📚 Environmental Quality Management 30 (4), 71-82, 2021	2021
28	Improving quality and yield production of coconut shell charcoal through a modified pyrolysis reactor with tar scrubber to reduce smoke pollution Google Scholar 👨‍🔬 RM Sari, S Gea, B Wirjosentono, S Hendrana, YA Hutapea 📚 Pol J Environ Stud 29 (2), 1815-1824, 2020	2020
29	Acetylated lignin from oil palm empty fruit bunches and its electrospun nanofibres with PVA: Potential carbon fibre precursor Google Scholar 👨‍🔬 M Harahap, YA Perangin-Angin, V Purwandari, R Goei, S Gea 📚 Heliyon 9 (3), 2023	2023
30	Cassava starch/bacterial cellulose-based bioplastics with Zanthoxylum acanthopodium. Google Scholar 👨‍🔬 S Gea, KM Pasaribu, AA Sarumaha, SRI Rahayu 📚 Biodiversitas: Journal of Biological Diversity 23 (5), 2022	2022
31	Scalable synthesis of porous silicon nanoparticles from rice husk with the addition of KBr as a scavenger agent during reduction by the magnesiothermic method as anode lithium … Google Scholar 👨‍🔬 A Daulay 📚 South African Journal of Chemical Engineering 41 (1), 203-210, 2022	2022
32	Impact of glycerol on oil palm trunk starch bioplastics enhanced with citric-acid epoxidized palm oil oligomers Google Scholar 👨‍🔬 H Hernando, E Julianti, A Nuryawan, SA Amaturrahim, AFR Piliang, ... 📚 Case Studies in Chemical and Environmental Engineering 10, 100839, 2024	2024
33	All-cellulose composite isolated from oil palm empty fruit bunch Google Scholar 👨‍🔬 S Gea, N Panindia, AF Piliang, A Sembiring, YA Hutapea 📚 Journal of Physics: Conference Series 1116 (4), 042013, 2018	2018
34	Biodegradable Composites Based on Poly (-Caprolactone) and Bacterial Cellulose as a Reinforcing Agent Google Scholar 👨‍🔬 S Gea, CT Reynolds, N Roohpur, N Soykeabkaew, B Wirjosentono, ... 📚 Journal of Biobased Materials and Bioenergy 4 (4), 384-390, 2010	2010
35	Extraction silica from rice husk with NaOH leaching agent with temperature variation burning rice husk. Google Scholar 👨‍🔬 A Daulay, S Gea 📚 Rasayan Journal of chemistry 14 (3), 2021	2021
36	Bio-oil hydrodeoxygenation over acid activated-zeolite with different Si/Al ratio Google Scholar 👨‍🔬 S Gea, I Irvan, K Wijaya, A Nadia, AN Pulungan, JL Sihombing, R Rahayu 📚 Biofuel Research Journal 9 (2), 1630-1639, 2022	2022
37	A review: Current trends and future perspectives of bacterial nanocellulose-based wound dressings Google Scholar 👨‍🔬 KM Pasaribu, IP Mahendra, M Karina, N Masruchin, NA Sholeha, S Gea, ... 📚 International Journal of Biological Macromolecules 279, 135602, 2024	2024
38	The stabilization of liquid smoke through hydrodeoxygenation over nickel catalyst loaded on sarulla natural zeolite Google Scholar 👨‍🔬 S Gea, A Haryono, A Andriayani, JL Sihombing, AN Pulungan, T Nasution, ... 📚 Applied Sciences 10 (12), 4126, 2020	2020
39	Synthesis of nitrogen-doped carbon dots from nanocrystalline cellulose by pyrolysis method as Hg2+ detector Google Scholar 👨‍🔬 M Marpongahtun, A Andriayani, Y Muis, S Gea 📚 Synthesis 14 (1), 2023	2023
40	Synthesis of graphene oxide from the Sawahlunto-Sijunjung coal via modified hummers method Google Scholar 👨‍🔬 V Purwandari, S Gea, B Wirjosentono, A Haryono 📚 AIP Conference Proceedings 2049 (1), 020065, 2018	2018
41	Preparation and characterisation of electrospun composite nanofibre polyvinyl alcohol/nanofibrillated cellulose isolated from oil palm empty fruit bunches Google Scholar 👨‍🔬 E Misran, B Wirdjosentono, NNM Noor, S Gea, SA Situmorang, ... 📚 BioResources 15 (4), 7906, 2020	2020
42	The characterization of Sarulla natural zeolite crystal and its morphological structure Google Scholar 👨‍🔬 JL Sihombing, S Gea, AN Pulungan, H Agusnar, B Wirjosentono, ... 📚 AIP Conference Proceedings 2049 (1), 020062, 2018	2018
43	Two stages upgrading of bio-oil through esterification and hydrodeoxygenation reactions using Fe2O3-CoO supported catalyst Google Scholar 👨‍🔬 AN Pulungan, R Goei, A Kembaren, N Nurfajriani, JL Sihombing, S Gea, ... 📚 Biomass Conversion and Biorefinery 14 (17), 20655-20664, 2024	2024
44	Talenta Google Scholar 👨‍🔬 MKM Nasution, R Sitepu, Rosmayati, MF Ganis Siregar, B Syam, ... 📚 Journal of Physics: Conference Series 1116 (2), 022033, 2018	2018
45	Enhancing the quality of nata de coco starter by channeling the oxygen into the bioreactor through agitation method Google Scholar 👨‍🔬 S Gea, KM Pasaribu, K Sebayang, E Julianti, SA Amaturahim, SU Rahayu, ... 📚 AIP Conference Proceedings 2049 (1), 020064, 2018	2018
46	Effect of variation temperature at burning rice husk to obtain silica Google Scholar 👨‍🔬 A Daulay, Andriayani, Marpongahtun, S Gea 📚 AIP Conference Proceedings 2342 (1), 040001, 2021	2021
47	Preparation of graphene oxide/bacterial cellulose nanocomposite via in situ process in agitated culture Google Scholar 👨‍🔬 SA Amaturrahim, S Gea, DY Nasution, YA Hutapea 📚 Asian J. Chem 30 (7), 1564-1568, 2018	2018
48	The effect of concentration of structure and optical properties of thin films synthesized by sol-gel methods spin coating Google Scholar 👨‍🔬 N Siregar, E Marlianto, S Gea 📚 Universitas Sumatera Utara, 2015	2015
49	Innovative bio-nanocomposites based on bacterial cellulose Google Scholar 👨‍🔬 S Gea	2011
50	Facile synthesis and electrochemical performance of bacterial cellulose/reduced graphene oxide/NiCo-layered double hydroxide composite film for self-standing supercapacitor … Google Scholar 👨‍🔬 AMA Saputra, DA Barus, R Goei, A Tok, M Ibadurrahman, ... 📚 Materials Science for Energy Technologies 8, 66-81, 2025	2025
51	Effect of mixed nanoparticles ZnS and polyvinyl alcohol (PVA) against nanocomposite mechanical properties of PVA/ZnS Google Scholar 👨‍🔬 M Sirait, S Gea, E Marlianto 📚 American Journal of Physical Chemistry 3 (1), 5-8, 2014	2014
52	Optimising cellulose nanofiber extraction from water hyacinth (Eichhornia crassipes) stems: Effects of steam explosion pretreatment and ultrasonication time Google Scholar 👨‍🔬 AMA Saputra, M Ibadurrahman, AFR Piliang, AJ Ong, R Goei, AIY Tok, ... 📚 JCIS Open 17, 100129, 2025	2025
53	Promoting electrospun lignin/PEO nanofiber for high-performance CO filtration Google Scholar 👨‍🔬 G Nainggolan, S Gea, Marpongahtun, M Harahap, Dellyansyah, ... 📚 Journal of Natural Fibers 20 (1), 2160402, 2023	2023
54	Wet-spinning of cellulose acetate reinforced with acetylated nano-crystalline cellulose as carbon fibre precursors Google Scholar 👨‍🔬 M Harahap, B Hararak, I Khan, S Pandita, G Saharman 📚 IOP Conference Series: Materials Science and Engineering 553 (1), 012038, 2019	2019
55	The study of liquid smoke as substitutions in coagulating latex to the quality of crumb rubber Google Scholar 👨‍🔬 S Gea, N Azizah, AF Piliang, H Siregar 📚 Journal of Physics: Conference Series 1120 (1), 012051, 2018	2018
56	Synthesis of carbon nanodots from cellulose nanocrystals oil palm empty fruit by pyrolysis method Google Scholar 👨‍🔬 S Gea, Y Muis, T Novita, AF Piliang 📚 Journal of Physics: Conference Series 1120 (1), 2018	2018
57	Biomass-derived N-doped Carbon Dots/TiO2 for Visible-Light-Induced Degradation of Methyl Orange in Wastewater Google Scholar 👨‍🔬 Marpongahtun, Andriayani, Y Muis, S Gea, SA Amaturrahim, ... 📚 Chemistry Africa 7 (6), 3319-3328, 2024	2024
58	Production of levulinic acid from glucose using nickel phosphate-silica catalyst Google Scholar 👨‍🔬 QU Putri, H Hasanudin, WR Asri, A Mara, R Maryana, S Gea, K Wijaya 📚 Reaction Kinetics, Mechanisms and Catalysis 136 (1), 287-309, 2023	2023
59	Bio-oil hydrodeoxygenation over zeolite-based catalyst: the effect of zeolite activation and nickel loading on product characteristics Google Scholar 👨‍🔬 S Gea, Irvan, K Wijaya, A Nadia, AN Pulungan, JL Sihombing, Rahayu 📚 International Journal of Energy and Environmental Engineering 13 (2), 541-553, 2022	2022
60	The effect of plasticizers and chitosan concentration on the structure and properties of Gracilaria sp.-based thin films for food packaging purpose Google Scholar 👨‍🔬 MZE Sinaga, S Gea, CF Zuhra, YA Sihombing, E Zaidar, F Sebayang, ... 📚 Polimery 66 (2), 119-126, 2021	2021
61	Facile synthesis of reduced graphene oxide using natural plant extracts as green reducing agents Google Scholar 👨‍🔬 AMA Saputra, Marpongahtun, Andriayani, R Goei, AIY Tok, S Goutianos, ... 📚 Journal of King Saud University–Engineering Sciences 37 (3), 5, 2025	2025
62	Temperature-dependent etherification of cassava starch with CHPTAC for cationic starch production Google Scholar 👨‍🔬 S Rahayu, B Wirjosentono, E Oktavia, CF Zuhra, KM Pasaribu, ... 📚 Case Studies in Chemical and Environmental Engineering 10, 100779, 2024	2024
63	Pioneering bio-oil extraction: The role of transition metal oxide zeolite catalysts in co-pyrolyzing palm fronds and high-density polyethylene Google Scholar 👨‍🔬 MI Hasibuan, S Gea, S Sarker, DA Barus, M Supeno, AK Pinem, ... 📚 Case Studies in Chemical and Environmental Engineering 10, 100821, 2024	2024
64	Hydrothermally nitrogen-doped carbon dots (NC-dots) from isolated lignin of oil palm empty fruit bunch for bacterial imaging of Staphylococcus aureus Google Scholar 👨‍🔬 PAZ Hasibuan, M Tanjung, W Lianto, S Gea, A Piliang, SA Situmorang 📚 Case Studies in Chemical and Environmental Engineering 8, 100455, 2023	2023
65	Preliminary study on the fabrication of cellulose nanocomposite film from oil palm empty fruit bunches partially solved into licl/dmac with the variation of dissolution time Google Scholar 👨‍🔬 S Gea, D Andita, S Rahayu, DY Nasution, SU Rahayu, AF Piliang 📚 Journal of Physics: Conference Series 1116 (4), 042012, 2018	2018
66	Efficient conversion of used palm cooking oil into biogasoline over hydrothermally prepared sulfated mesoporous silica loaded with NiMo catalyst Google Scholar 👨‍🔬 K Wijaya, S Ramadhani, AJ Saviola, N Prasetyo, S Gea, L Hauli, AK Amin, ... 📚 Results in Engineering 24, 103185, 2024	2024
67	Silica-based catalysts for biodiesel production: a brief review Google Scholar 👨‍🔬 A Aneu, RA Pratika, Hasanudin, S Gea, K Wijaya, WC Oh 📚 Silicon 15 (12), 5037-5047, 2023	2023
68	Carbon-nano fibers yield improvement with iodinated electrospun PVA/silver nanoparticle as precursor via one-step synthesis at low temperature Google Scholar 👨‍🔬 S Gea, B Attaurrazaq, SA Situmorang, AFR Piliang, S Hendrana, ... 📚 Polymers 14 (3), 446, 2022	2022
69	Study of bacterial cellulose as scaffold on cartilage tissue engineering Google Scholar 👨‍🔬 S Gea, RM Sari, AF Piliang, DP Indrawan, YA Hutapea 📚 AIP Conference Proceedings 2049 (1), 020061, 2018	2018
70	Peningkatan kualitas produksi santan kelapa sebagai bahan baku industri kuliner di Kota Medan Google Scholar 👨‍🔬 S Gea, K Sebayang, TA Aththorick	2016
71	Mechanical properties of oil palm trunk by reactive compregnation methode with dammar resin. Google Scholar 👨‍🔬 N Nurfajriani, L Widiarti, S Gea, T Thamrin, B Wirjosentono	2015
72	Pyrolysis of palm fronds waste into bio-oil and upgrading process via esterification-hydrodeoxygenation using Cu–Zn metal oxide catalyst loaded on mordenite zeolite Google Scholar 👨‍🔬 AN Pulungan, R Goei, F Harahap, L Simatupang, C Suriani, S Gea, ... 📚 Waste and Biomass Valorization 15 (1), 187-206, 2024	2024
73	Bacterial cellulose-based paper production coated with poly-ethylene oxide/poly-vinyl alcohol Google Scholar 👨‍🔬 S Gea, DY Nasution, KM Pasaribu, RM Tambunan, AF Piliang, M Karina 📚 South African Journal of Chemical Engineering 46, 277-285, 2023	2023
74	The effect of chemical activation using base solution with various concentrations towards sarulla natural zeolite Google Scholar 👨‍🔬 S Gea, A Haryono, A Andriayani, JL Sihombing, AN Pulungan, T Nasution, ... 📚 Elkawnie 6 (1), 85-95, 2020	2020
75	Thermal behavior, mineral phase, and microstructure characteristics of Na2Mn3O7 synthesized from MnO2 and MnCl2 via a low-cost, simple conventional mixing method Google Scholar 👨‍🔬 HA Marlina, K Sebayang, S Gea, Z Noer, R Septawendar, B Sunendar 📚 Journal of the Ceramic Society of Japan 128 (11), 970-976, 2020	2020
76	Morphological study of fluorescent carbon Nanoparticles (F-CNPs) from ground coffee waste soot oxidation by diluted acid Google Scholar 👨‍🔬 S Gea, S Tjandra, J Joshua, B Wirjosentono 📚 IOP Conference Series: Materials Science and Engineering 309 (1), 012037, 2018	2018
77	Synthesis of nanobentonite as heavy metal adsorbent with various solvents Google Scholar 👨‍🔬 M Sirait, S Gea, N Bukit, N Siregar, C Sitorus 📚 Oriental Journal of Chemistry 34 (4), 1854-1857, 2018	2018
78	Synergy of Intercalation and Stacking Fault Formation to Increase the Optical Properties of N-CQDs/ZnO NCs via Nonmetal–Metal Interface and the Investigation of Its … Google Scholar 👨‍🔬 DG Ayu, DJ Telaumbanua, Hariyati, R Goei, AIY Tok, AFR Piliang, ... 📚 Langmuir 41 (27), 17394-17414, 2025	2025
79	The Comparison of Opaque TiO2 and Transparent TiO2 on the Performance of agsbs2–Sensitized Solar Cell Prepared by Solution Processing Google Scholar 👨‍🔬 K Sebayang, SU Rahayu, MW Lee, S Gea, H Ginting, A Warman 📚 relation 14 (1), 88-93, 2021	2021
80	Green plastics based on thermoplastic starch and steam-exploded nanofiber cellulose Google Scholar 👨‍🔬 E Zaidar, S Lenny, SA Amaturrahim, SA Situmorang 📚 Rasayan J. Chem, 2021	2021
81	The preparation of agar-chitosan film from Gracilaria Google Scholar 👨‍🔬 MZE Sinaga, S Gea, YA Sihombing, E Zaidar, R Bulan, N Panindia, ... 📚 Proceedings of the international conference of science, technology …, 2020	2020
82	The use of bentonite of Bener Meriah Aceh to improve the mechanical properties of Polypropylene-Montmorillonite Nanocomposite Google Scholar 👨‍🔬 J Julinawati, S Gea, E Eddiyanto, B Wirjosentono, I Ichwana 📚 IOP Conference Series: Materials Science and Engineering 523 (1), 012023, 2019	2019
83	Pelatihan dan Pengembangan Peningkatan Kompetensi Penulisan Karya Ilmiah Bagi Dosen Universitas Prima Kota Medan Google Scholar 👨‍🔬 Y Absah, SH Situmorang, BKF Sembiring, S Gea 📚 Jurnal Solusi Masyarakat (JSM) 2 (1), 41-45, 2024	2024
84	The exfoliation process of sawahlunto coal into graphene through the modified hummer method Google Scholar 👨‍🔬 V Purwandari, S Gea, B Wirjosentono, A Haryono, S Rahayu, YA Hutapea 📚 Rasayan Journal of Chemistry 13 (1), 593-600, 2020	2020
85	Extraction and characterization of cellulose nanofibers from rice husk: Potential for electrospun PVA/CNF mat composites Google Scholar 👨‍🔬 M Harahap, V Purwandari, DA Zebua, N Daulay, SA Situmorang, ... 📚 Kuwait Journal of Science 52 (3), 100403, 2025	2025
86	Graphene oxide–bacterial cellulose composites for enhanced adsorption of rhodamine B from aqueous solutions Google Scholar 👨‍🔬 AMA Saputra, FN Syakira, SA Luthfiyah, S Azkia, MI Hasibuan, R Goei, ... 📚 Water Science and Engineering, 2025	2025
87	Evaluation to possibility of cellulose fibers isolated from kapok randu (Ceiba Pentandra) as a precursor growth of carbon micro structures with the assist of metal catalysts Google Scholar 👨‍🔬 S Gea, AFR Piliang, B Attaurrazaq, S Rahayu, S Hendrana 📚 Journal of King Saud University-Science 35 (2), 102423, 2023	2023
88	Ultrasound pretreatment and enzymatic deinking by using bacterial cellulases from rice husk Google Scholar 👨‍🔬 S Gea, R Bulan, E Zaidar, AF Piliang, N Oktari, S Rahayu, YA Hutapea, ... 📚 Journal of Wood Chemistry and Technology 43 (3), 117-128, 2023	2023
89	Utilization of silica nanoparticles from rice husks for improving the mechanical properties of dental materials: A literature review Google Scholar 👨‍🔬 S Sinamo, S Tarigan, S Gea, DP Putra 📚 Bioscientia Medicina: Journal of Biomedicine & Translational Research, 2022	2022
90	Comparative optimization of cellulase and laccase enzymes in deinking process of used newspapers Google Scholar 👨‍🔬 S Gea, N Oktari, A Andriayani, S Rahayu, AF Piliang 📚 Jurnal Kimia Sains dan Aplikasi, 2020	2020
91	Fabrication of poly (vinyl alcohol)/bentonite nanocomposites using sol-gel method Google Scholar 👨‍🔬 M Sirait, S Gea, N Bukit, EM Ginting, RF Zega 📚 Asian Journal of Chemistry 30 (10), 2210-2214, 2018	2018
92	The analysis of thermal and mechanical properties of biocomposite policaprolactone/cellulose nanofiber from oil palm empty fruit bunches Google Scholar 👨‍🔬 S Gea, M Surga, S Rahayu, Marpongahtun, YA Hutapea, AF Piliang 📚 AIP Conference Proceedings 2049 (1), 020063, 2018	2018
93	Pembuatan nanokomposit polivinil alkohol/nanoserat selulosa yang diisolasi dari tandan kosong kelapa sawit (Elais guinensis Jack) dengan metode ledakan uap Google Scholar 👨‍🔬 DW Cherlina, S Gea, H Nainggolan 📚 Jurnal Kimia Mulawarman 14 (2), 120-126, 2017	2017
94	rGO/ZnO nanocomposite with XRD-structural characterization for electrochemical detection of palmitic acid as Ganoderma boninense biomarker Google Scholar 👨‍🔬 AMA Saputra, S Gea, S Sabar, R Goei, M Harsa, MS Harahap 📚 Next Materials 9, 101325, 2025	2025
95	Improved mechanical and thermal performance of bacterial cellulose paper through cationic cassava starch addition Google Scholar 👨‍🔬 S Rahayu, B Wirjosentono, E Oktavia, CF Zuhra, AFR Piliang, ... 📚 South African Journal of Chemical Engineering 50 (1), 379-387, 2024	2024
96	The characterization of agitated bacterial cellulose-based paper synthesized at various rotational speeds Google Scholar 👨‍🔬 S Gea, Marpongahtun, DY Nasution, KM Pasaribu, SA Amaturrahim, ... 📚 THE 2ND INTERNATIONAL CONFERENCE ON CHEMICAL SCIENCE AND TECHNOLOGY …, 2023	2023
97	The use of nanofibrils celulose of sugarcane bagasse as precursor in synthesizing carbon nanodots by hydrothermal method Google Scholar 👨‍🔬 DA Barus, J Ginting, H Ginting, AH Siregar, S Rahayu, AF Piliang, ... 📚 Journal of Physics: Conference Series 1321 (2), 022021, 2019	2019
98	The study on physical and mechanical properties of latex/graphene oxide composite film Google Scholar 👨‍🔬 S Gea, DA Barus, YS Sibarani, N Panindia, JN Sari, K Sebayang, ... 📚 Journal of Physics: Conference Series 1120 (1), 012052, 2018	2018
99	Acetylation of breadfruit utarch by Using Acetic Anhydride Google Scholar 👨‍🔬 CF Zuhra, S Gea, M Ginting, Marpongahtun, S Lenny 📚 Journal of Physics: Conference Series 1116 (4), 042047, 2018	2018
100	The preparation and characterization of bentonite nanoparticle from Bener Meriah, Indonesia Google Scholar 👨‍🔬 S Gea, M Firmansyah, T Hidayat, Marpongahtun, YA Hutapea 📚 Journal of Physics: Conference Series 1116 (4), 042011, 2018	2018
101	Esterification of palm fatty acid distillate to methyl ester using amberlyst catalyst in a semi-continuous reactor Google Scholar 👨‍🔬 S Gea, AA Widati, S Syukri, Eddiyanto, D Wardana 📚 AIP Conference Proceedings 3026 (1), 030008, 2024	2024
102	Structure and optical properties of Fe2TiO5/Ag/C nanocomposites as photocatalyst materials Google Scholar 👨‍🔬 SA Amaturrahim, IR Saragi, C Simanjuntak, S Gea, B Attaurrazaq 📚 Case Studies in Chemical and Environmental Engineering 10, 100846, 2024	2024
103	Plaster Nanopartikel Perak Kitosan untuk Penyembuhan Luka Eksisi pada Penderita Diabetes Google Scholar 👨‍🔬 PAZ Hasibuan, Y Yuandani, A Prayoga, JG Ginting, S Gea, KM Pasaribu 📚 Kementerian Hukum dan Hak Asasi Manusia, 2023	2023
104	Nitrogen-doped carbon dots from bilimbi juice (Averrhoa bilimbi L.) via hydrothermal method for iron and mercury sensing Google Scholar 👨‍🔬 AFR Piliang, K Tarigan, S Humaidi, DA Barus, S Gea 📚 Elkawnie 8 (1), 149-160, 2022	2022
105	Preparation of biodegradable and low-cost lignin-based PVOH carbon fibers prepared by electrospinning Google Scholar 👨‍🔬 AH Siregar, A Warman, M Harahap, G Nainggolan, D Dellyansyah, S Gea 📚 Indones. J. Chem. 21 (6), 1463, 2021	2021
106	Making composites from mixing limestone with addition of latex Google Scholar 👨‍🔬 AH Siregar, S Gea, N Indriani 📚 n Proceedings of the 1st International Conference on Chemical Science and …, 2020	2020
107	The Fabrication of Natural Zeolite Via Co-Precipitation Method as Cu, Pb and Zn Metal Absorbent Google Scholar 👨‍🔬 M Sirait, K Saragih, S Gea 📚 Latvian journal of physics and technical sciences 57 (3), 40-47, 2020	2020
108	Mechanical and morphological characteristic investigations of deinked used newsprint paper via ultra-sonochemistry method Google Scholar 👨‍🔬 S Gea, S Rahayu, A Andriayani, AFR Piliang, N Oktari 📚 Jurnal Natural 20 (2), 49-55, 2020	2020
109	Morphology and thermal properties of polypropylene-montmorillonite nanocomposite using modified bentonite of Bener Meriah Aceh Google Scholar 👨‍🔬 J JULINAWATI, B WIRJOSENTONO, E EDDIYANTO, S GEA, I RAMLI 📚 Jurnal Natural 20 (3), 56-60, 2020	2020
110	Analisa XRD Terhadap Perubahan Struktur Dan Kristalinitas Karbonisasi Batubara Sawahlunto–Sijunjung Sumatera Barat Google Scholar 👨‍🔬 V Purwandari, S Gea, B Wijosentono 📚 Talenta Conference Series: Science and Technology (ST) 2 (1), 88-91, 2019	2019
111	Mechanical properties of nanocrystal cellulose reinforced polystyrene with glycerol monostearic as antistatic agent Google Scholar 👨‍🔬 Adriana, R Jalal, Thamrin, B Wirjosentono, S Gea 📚 International Journal of ChemTech Research 6 (4), 2421-2426, 2014	2014
112	Pembuatan dan Karakterisasi Membran Pb2+-Kitosan Sebagai Sensor Kimia Google Scholar 👨‍🔬 S Gea	2000
113	The synthesis of macro-initiator using cellulose isolated from OPEFB via atomic transfer radical polymerization method Google Scholar 👨‍🔬 E Eddiyanto, M Ilham, FA Daulay, AFR Piliang, JD Siregar, S Gea 📚 AIP Conference Proceedings 3026 (1), 070003, 2024	2024
114	Electrical and Thermal Conductivity of Cyclic Natural Rubber/Graphene Nanocomposite Prepared by Solution Mixing Technique Google Scholar 👨‍🔬 V Purwandari, S Gea, B Wirjosentono, A Haryono, IP Mahendra, ... 📚 Universitas Sumatera Utara, 2020	2020
115	Morphological investigation of bacterial cellulose/cassava starch nanocomposites produced by in-situ process in agitated culture Google Scholar 👨‍🔬 CF Zuhra, Y Muis, S Gea, SA Amaturrahim, KM Pasaribu, SU Rahayu 📚 Icosteerr (2018), 1042-1046, 2020	2020
116	The effect of chelating agents on the formation of manganese oxide (MnO) in the synthesis of sodium manganese oxide (Na2Mn3O7) Google Scholar 👨‍🔬 HA Marlina, K Sebayang, S Gea, Z Noer, R Septawendar, B Sunendar 📚 IOP Conference Series: Materials Science and Engineering 980 (1), 012055, 2020	2020
117	Sintesis Nanoserat Selulosa dari Tandan Kosong Sawit (Tks) dengan Menggunakan Metode Tetramethyl Piperidine 1 Oxyl (TEMPO) Google Scholar 👨‍🔬 S Gea, ID Agrista, CF Zuhra 📚 Talenta Conference Series: Science and Technology (ST) 2 (1), 22-28, 2019	2019
118	Activity assays of calcinated sarulla natural zeolite (snz-cal) in catalytic hydrocracking rubber seed oil Google Scholar 👨‍🔬 JL Sihombing, S Gea, A Kembaren, Sabani, AN Pulungan, AA Wibowo, ... 📚 Journal of Physics: Conference Series 1116 (4), 042035, 2018	2018
119	Hydrogen generation from coconut shell bio-oil via steam reforming incorporating energy–exergy analysis Google Scholar 👨‍🔬 RA Syahputra, B Wirjosentono, K Wijaya, H Susilo, DH Sinaga, S Gea	2026
120	Transforming pyrolytic char from non-recycled domestic plastic waste into high-performance mesoporous char for competitive dyes adsorption system Google Scholar 👨‍🔬 I Kurniawan, AH Nasution, FFNS Simanjuntak, H Khair, R Ichwani, ... 📚 Journal of Analytical and Applied Pyrolysis, 107763, 2026	2026
121	Characterization and evaluation of a cellulose-based hydrogel prepared from oil palm empty fruit bunches and crosslinked with citric acid Google Scholar 👨‍🔬 N Lubis, S Gea, T Tamrin, JB Tarigan, AFR Piliang, R Goei 📚 AIP Conference Proceedings 3195 (1), 040001, 2025	2025
122	Compression strength of metal-ceramic fixed dental prostheses reinforced by nanoparticle silica from rice husks Google Scholar 👨‍🔬 S Sinamo, S Gea, S Tarigan, DP Putra, Z Yen, R Goei, AIY Tok 📚 Journal of International Dental and Medical Research, 2023	2023
123	Impact of the Concentration Ethylenediamine on Optical Properties of Carbon Dots from Jengkol Peel (Archinendron pauciflorum) Google Scholar 👨‍🔬 AS Prayugo, M Marpongahtun, S Gea 📚 Jurnal Akademika Kimia 12 (1), 20-25, 2023	2023
124	Characteristics of Simalambuo (Lophopetalum sp.) wood from Nias Island, North Sumatra Province, Indonesia Google Scholar 👨‍🔬 AH Iswanto, DW Amanda, S Gea, A Susilowati, W Fatriasari, A Darwis, ... 📚 Biodiversitas 24 (7), 4193-4201, 2023	2023
125	Synthesis of Cellulose-Based Superabsorbent Hydrogel Filled with Cellulose Nanofiber From Oil Palm Empty Fruit Bunches Google Scholar 👨‍🔬 N Lubis, S Gea, T Tamrin, J Tarigan 📚 Journal of Southwest Jiaotong University, 2022	2022
126	Coconut oil effect on the hygroscopic properties of Simalambuo wood (Lophopetalum spp.) Google Scholar 👨‍🔬 LIP Zai, S Gea, M Marpongahtun, E Eddyanto, N Azizah, AH Siswanto 📚 Jurnal Natural 22 (2), 78-84, 2022	2022
127	Enhancement Mechanical Properties of Simalambuo Wood (Loppophetalum spp) Delignified using NaOH in The Thermomechanical Densification Method Google Scholar 👨‍🔬 N Azizah, F Sindika, A Andriayani, S Gea 📚 Jurnal Akademika Kimia 11 (4), 231-235, 2022	2022
128	Scientific writing coaching class for teachers in Sibolga city Google Scholar 👨‍🔬 TA Aththorick, S Lenny, YA Sihombing, KM Pasaribu, AF Piliang 📚 ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat 6 (1), 124-132, 2021	2021
129	The manufacture nanofiber from sugarcane bagasse lignin with polyvinyl alcohol by electrospinning method Google Scholar 👨‍🔬 AH Siregar, S Gea, LM Sitorus 📚 AIP Conference Proceedings 2342 (1), 060003, 2021	2021
130	In vitro İnvestigation of Bacterial Cellulose/Turmeric Extract (Bc-Te) Nanocomposite for Burn Wound Dressing.‘ Google Scholar 👨‍🔬 RC Siahaan, M Sitorus, R Mulia, S Gea 📚 1st International Conference on Chemical Science and Technology Innovation …, 2020	2020
131	Quality improvement of liquid smoke of coconut shell by tar scrubber Google Scholar 👨‍🔬 RM Sari, S Gea, B Wirjosentono, S Hendrana	2020
132	Effects of Hydrogen Peroxide with Cassava Extract Addition as Bleaching Material on Human Enamel-An in Vitro Study Google Scholar 👨‍🔬 T Abidin, S Gea 📚 Universitas Sumatera Utara, 2019	2019
133	Preparation of Polyvinyl Alcohol/Cellulose Nano fiber Nanocomposite Isolated from Empty Oil Palm Fruit Bunches Google Scholar 👨‍🔬 S Gea, Indra, Y Muis, N Panindia, YA Hutapea 📚 IOP Conference Series: Materials Science and Engineering 553 (1), 012041, 2019	2019
134	IbM of Small Medium Enterprise of Coconut Milk and Liquid Smoke from Coconut Shells Google Scholar 👨‍🔬 E Yusraini, S Gea 📚 Journal of Saintech Transfer 1 (1), 89-101, 2018	2018
135	Characterization of composite boards made of oil palm trunk flour/maleic anhydride grafted polypropylene Google Scholar 👨‍🔬 DY Nasution, Marpongahtun, S Gea, Ardiansyah, Ridho 📚 Journal of Physics: Conference Series 1116 (4), 042045, 2018	2018
136	THE ISOLATION OF NANOCRYSTALLINE CELLULOSE FROM PALM EMPTY FRUIT BUNCHES Google Scholar 👨‍🔬 M Harahap, F Aulia, S Gea	2014
137	Sifat Mekanik dan Termal Bionanokomposit Pati yang Diperkuat oleh Partikulat Sellulose Bakteri Google Scholar 👨‍🔬 S Gea, Y Muis 📚 Jurnal Teknobiologi 3 (01), 2012	2012
138	Preparation and Characterization of Nanocrystalline Cellulose from Sugar Palm Bunch Google Scholar 👨‍🔬 MP Nasution, S Gea
139	Carbon quantum dots surface decorated molybdenum disulfide by hydrothermal synthesis for tetracycline detector Google Scholar 👨‍🔬 YA Lubis, S Gea, SA Lubis, A Ramadhani, AN Harahap, AA Arsyah, ... 📚 AIP Conference Proceedings 3449 (1), 030002, 2026	2026
140	Biochar-Based Catalysts in Hydrogen Production: Mechanisms, Activation, and Efficiency Google Scholar 👨‍🔬 RA Syahputra, M Irvan, A Andriayani, B Wirjosentono, K Wijaya, S Sarker, ... 📚 Trends in Sciences 23 (6), 13289-13289, 2026	2026
141	Green one-pot synthesis of rGO/AgNP–β-cyclodextrin nanocomposites using Miconia crenata leaf extract: Insights into structural, interfacial, optical, and textural evolution Google Scholar 👨‍🔬 AMA Saputra, YW Hartati, S Goutianos, NLW Septiani, S Gea 📚 Diamond and Related Materials, 113683, 2026	2026
142	NaHCO₃-Assisted Synthesis of Ni-Promoted Sulfated Mesoporous Silica for the Hydrocracking of Used Cooking Oil into Biogasoline Google Scholar 👨‍🔬 K Wijaya, MF Vebryana, N Prasetyo, AJ Saviola, WD Saputri, AK Amin, ... 📚 Bulletin of Chemical Reaction Engineering & Catalysis 21 (1), 149-167, 2026	2026
143	Incorporation of Carbon Dots into the ZIF-8 Composite by Solvothermal Method Google Scholar 👨‍🔬 AS Prayugo, Marpongahtun, S Gea, H Sutanto 📚 Journal of Physics: Conference Series 3238 (1), 012001, 2026	2026
144	Enhancement of the Photocatalytic Activity of TiO2 Modified with Carbon Dots from Tamarind Seeds (Tamarindus indica L.) for Eco-friendly Naphthol B Dye Degradation Google Scholar 👨‍🔬 AMA Saputra, SA Luthfiyah, S Azkia, FN Syakira, MI Hasibuan, R Goei, ... 📚 JCIS Open, 100183, 2026	2026
145	Synthesis and Optical Characterization of N-Doped Carbon Dots Derived from Citric Acid Google Scholar 👨‍🔬 R Fitri, S Gea 📚 Journal of Technomaterial Physics 8 (2), 103-110, 2026	2026
146	Enhancing recycled-paper quality using cellulose nanocrystals from pineapple leaf waste Google Scholar 👨‍🔬 A Piliang, N Sihotang, M Ibadurrahman, S Rahayu, Z Yen, R Goei, ... 📚 Nordic Pulp & Paper Research Journal 41 (2), 361-374, 2026	2026
147	Efektivitas Nanopartikel Varnish Ikan Teri Nasi (Stolephorus commersonnii) sebagai Bahan Topikal Aplikasi Fluor terhadap Bakteri Streptococcus mutans: Studi In Vitro Google Scholar 👨‍🔬 S Pintauli, S Gea 📚 Universitas Sumatera Utara, 2025	2025
148	Preparation of biochar catalyst from coconut shell impregnated with nickel metal as a heterogeneous catalyst Google Scholar 👨‍🔬 Syahputra, R.A., Wirjosentono., B., Wijaya, K., Sutiani, A., Silitonga, P.M ... 📚 FMIPA Universitas Negeri Medan (Indonesia), 2025	2025
149	The effect of antifungal activities of auto-polymerized silicone soft denture liner material containing origanum vulgare gel against Candida albicans over 14-day period: an in … Google Scholar 👨‍🔬 A Ariyani, ID Nasution, D Suryanto, S Gea, SNSA Rahman, KB Awang 📚 Padjadjaran Journal of Dentistry 37 (1), 25-34, 2025	2025
150	Improvement of Research Proposal Writing Skills for PSDKU USU Lecturers in North Nias Google Scholar 👨‍🔬 S Gea, I Zulkarnain 📚 ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat 10 (1), 6-10, 2025	2025
151	Synthesis, Microstructure, Optical Properties, and Sensitive Amoxicillin Detection of Carbon Dots Google Scholar 👨‍🔬 YA Lubis, S Gea, MF Lubis, WWL Pai, M Marpongahtun 📚 Indonesian Journal of Chemical Research 13 (1), 38-45, 2025	2025
152	Fluoride Concentration in Anchovy (Stolephorus commersonnii) Nanopowder and Its Potential in Dental Caries Prevention Google Scholar 👨‍🔬 MD Pangaribuan, S Pintauli, S Gea 📚 Denta: Jurnal Kedokteran Gigi 19 (2), 92-99, 2025	2025
153	ENVIRONMENTALLY SYNTHESISED YELLOW FLUORESCENT CARBON DOTS FOR ANTIBACTERIAL APPLICATIONS. Google Scholar 👨‍🔬 AS Prayugo, S Gea, H Sutanto 📚 Rasayan Journal of Chemistry 18 (4), 2025	2025
154	ZIF-8 modified with N-doped Carbon Dots using the direct mixing method at room temperature Google Scholar 👨‍🔬 AS Prayugo, Marpongahtun, S Gea, H Sutanto 📚 Journal of Physics: Conference Series 3139 (1), 012016, 2025	2025
155	Penetration ability of liquid smoke and silicon oil on Simalambuo wood Google Scholar 👨‍🔬 N Azizah, A Andriayani, S Gea 📚 AIP Conference Proceedings 3195 (1), 090002, 2025	2025
156	Absorbance spectral analysis of obtained nitrogen doped carbon dots from Jengkol peel Google Scholar 👨‍🔬 AS Prayugo, M Marpongahtun, S Gea 📚 AIP Conference Proceedings 3195 (1), 040012, 2025	2025
157	Synthesis and physicochemical properties of cationic starch from the etherification of cassava (Manihot utilissima) Google Scholar 👨‍🔬 S Rahayu, S Gea, E Oktavia, R Goei, CF Zuhra, RM Sari, N Azzura 📚 AIP Conference Proceedings 3195 (1), 040002, 2025	2025
158	Investigation of electrical conductivity of graphite, graphene oxide (GO) and reduced graphene oxide (rGO) as fillers in acetate cellulose film-based nanonomposite Google Scholar 👨‍🔬 RP Manullang, S Gea, D Dellyansyah, R Goei, RM Sari, EB Silitonga, ... 📚 AIP Conference Proceedings 3195 (1), 040016, 2025	2025
159	Preface: The 2nd International Conference on Chemical Science and Technology (ICCST2022) Google Scholar 👨‍🔬 R Hardiyanti, B Wirjosentono, SB Sembriring, J Kaban, S Gea, M Basyuni, ... 📚 AIP Conference Proceedings 3195 (1), 010001, 2025	2025
160	The 2nd International Conference on Chemical Science and Technology (ICCST2022) Google Scholar 👨‍🔬 R Hardiyanti, B Wirjosentono, SB Sembriring, J Kaban, S Gea, M Basyuni, ... 📚 AIP Conference Proceedings 3195 (1), 010002, 2025	2025
161	Analysis of multiple pesticide residues in chilli and tomato by GC-MS/MS and LC-MS/MS Google Scholar 👨‍🔬 S Yuliasmi, M Muchlisyam, J Reveny, S Gea 📚 AIP Conference Proceedings 3195 (1), 050002, 2025	2025
162	Blue to green fluorescence of carbon-dots from lignin residual liquid synthesized from hydrothermal method Google Scholar 👨‍🔬 S Sumaiyah, PAZ Hasibuan, M Tanjung, W Lianto, AF Piliang, S Gea 📚 AIP Conference Proceedings 3026 (1), 020005, 2024	2024
163	Graft copolymerisation of maleic anhydride onto natural rubber (SIR-20): Melt processing and characterisation Google Scholar 👨‍🔬 E Eddiyanto, M Sipayung, S Gea 📚 AIP Conference Proceedings 3026 (1), 030007, 2024	2024
164	Characterization of Silicon from Rice Husk Doped with Cobalt: Analysis of Structure and Magnetoelectric Properties Google Scholar 👨‍🔬 R Kurniawan, A Andriayani, S Gea, H Kurniawan 📚 JURNAL ILMU FISIKA\| UNIVERSITAS ANDALAS 16 (2), 97-106, 2024	2024
165	Rice husk is renewable source in synthesis nanosilicon and its application as potential anode lithium-ion batteries Google Scholar 👨‍🔬 A Daulay, Andriayani, Marpongahtun, S Gea 📚 THE 2ND INTERNATIONAL CONFERENCE ON CHEMICAL SCIENCE AND TECHNOLOGY …, 2023	2023
166	Lignocellulosic analysis from oil palm empty fruit bunches and crystallinity index analysis of cellulose nanofibers isolated via high pressure steam explosion Google Scholar 👨‍🔬 N Lubis, S Gea, Tamrin, J Tarigan 📚 THE 2ND INTERNATIONAL CONFERENCE ON CHEMICAL SCIENCE AND TECHNOLOGY …, 2023	2023
167	Preface: 2nd International Conference on Chemical Science and Technology Innovation (ICOCSTI) Google Scholar 👨‍🔬 Andriayani, B Wirjosentono, SB Sembriring, J Kaban, S Gea, M Basyuni, ... 📚 THE 2ND INTERNATIONAL CONFERENCE ON CHEMICAL SCIENCE AND TECHNOLOGY …, 2023	2023
168	Editorial Board and Editor Name: 2nd International Conference on Chemical Science and Technology Innovation (ICOCSTI) Google Scholar 👨‍🔬 Andriayani, B Wirjosentono, SB Sembriring, J Kaban, S Gea, M Basyuni, ... 📚 THE 2ND INTERNATIONAL CONFERENCE ON CHEMICAL SCIENCE AND TECHNOLOGY …, 2023	2023
169	Synthesis of Fluorescent Carbon Dots from Soybean Residuals Using Hydrothermal Method Google Scholar 👨‍🔬 DG Ayu, S Gea, A Andriayani, R Goei 📚 Jurnal Akademika Kimia 12 (2), 71-77, 2023	2023
170	Synthesis of Carbon Dots From Empty Fruit Bunch Biochar an Acid-Free Hydrothermal Method Google Scholar 👨‍🔬 M Marpongahtun, R Pramudita, S Gea, A Daulay 📚 Elkawnie 9 (1), 61-70, 2023	2023
171	Nanofiber Cellulose/Lignin from Oil Palm Empty Fruit Bunches and the Potential for Carbon Fiber Precursor Prepared by Wet-spinning Google Scholar 👨‍🔬 S Gea 📚 International Journal of Technology: IJ Tech, 2023	2023
172	Development of Chromium-Impregnated Sulfated Silica as a Mesoporous Catalyst in the Production of Biogasoline from Used Cooking Oil via a Hydrocracking Process Google Scholar 👨‍🔬 TS Ningrum, AJ Saviola, K Wijaya, N Prasetyo, ZL Ardelia, RA Fitria, ...	2023
173	Morphological and Mechanical Properties of Old Newspaper Deinked with Cellulase and Laccase Combination Google Scholar 👨‍🔬 N Oktari, S Gea, SR Andriayani, RM Sari, KM Pasaribu	2022
174	The Influence of PVOH Concentration on the Structural Morphology and Dimension of Electrospun Nanofibers Google Scholar 👨‍🔬 E Misran, B Wirdjosentono, NM Noor, S Gea, M Harahap, SA Situmorang 📚 The International MIPAnet Conference on Science and Mathematics (IMC-SciMath), 2022	2022
175	Green Synthesis and Characterization of Silver Nanopaticles Google Scholar 👨‍🔬 M Harahap, M Oktavia, S Gea	2022
176	Effect of Variation HCl Concentration on Natural Zeolite Dealumination to The Content of Liquid Smoke Compounds by Hydrodeoxygenation Process Google Scholar 👨‍🔬 S Gea, A Andriayani, A Haryono, A Malik, RM Sari, J Layla 📚 SCITEPRESS–Science and Technology Publications, 2022	2022
177	Enlarge Bacterial Cellulose Pore by Adding Aloe Vera Extract as Potential Material for Skin Tissue Engineering Google Scholar 👨‍🔬 KM Pasaribu, S Gea, SI Tamrin, IP Mahendra, AA Sarumaha	2022
178	Hydrocracking of Mefa Rubber Seed Oil into Biofuels Fraction with Co and CoMo Metals Supported on Zeolite Catalyst Google Scholar 👨‍🔬 JL Sihombing, AWN Herlinawati, AN Pulungan, M Zubir, T Nasution, ...	2022
179	Electrospinning of Lignin as a Carbon Fiber Precursoe Google Scholar 👨‍🔬 AH Siregar, S Gea, A Warman, M Harahap	2022
180	Lignin Isolation from Oil Palm Empty Fruit Bunches (OPEFB) by Acidic Method Google Scholar 👨‍🔬 S Gea, AH Siregar, E Zaidar, M Harahap 📚 SCITEPRESS–Science and Technology Publications, 2022	2022
181	Morphological Investigation of Electrospun Nanofibers Cellulose Acetate-based Membrane Google Scholar 👨‍🔬 SA Situmorang, S Gea	2022
182	An overview of the basic properties of several wood species from North Sumatra Google Scholar 👨‍🔬 AH Iswanto, A Darwis, A Susilowati, W Fatriasari, S Gea, L Hakim, ... 📚 강원대학교 산림과학연구소 학술대회, 78-78, 2022	2022
183	Sintesis dan Karakterisasi Grafena Quantum Dots dari Grafit Batubara Sawahlunto Melalui Metode Hidrotermal Sebagai Aditif terhadap Konduktivitas Film Berbasis Selulosa Asetat Google Scholar 👨‍🔬 S Gea 📚 Universitas Sumatera Utara, 2021	2021
184	Study of Provision of Cellulose Nanocrystal Derived From Palm Oil Empty Fruits Bunches (EFB) Google Scholar 👨‍🔬 F Aulia, S Gea 📚 Journal of Chemical Natural Resources 3 (2), 161-166, 2021	2021
185	Bioscientia Medicina: Journal of Biomedicine & Translational Research Google Scholar 👨‍🔬 A Ghanie, L Paramita, F Widyasari, A Hifni, E Bahar	2021
186	Teacher Upgrading Skill in Preparing Materials and Examination Based on Images in Sibolga City Google Scholar 👨‍🔬 A Andriayani, CF Zuhra, A Maghfirah, M Yanti, S Gea, KM Pasaribu, ... 📚 ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat 5 (2), 677-683, 2020	2020
187	Effect of Nanocrystal Cellulose Isolated from Empty Fruit Bunches (Elaeis Guineensis Jack) Addition on Morphological and Mechanical Properties of Natural Rubber Latex Product. Google Scholar 👨‍🔬 M Siska Yuliani, S Gea 📚 Journal of Chemical Natural Resources Vol 2 (02), 141-149, 2020	2020
188	Jurnal Natural Google Scholar 👨‍🔬 S GEA, I RAMLI 📚 Jurnal Natural 20, 3, 2020	2020
189	Nanoenkapsulasi Asam Stearat Dengan Modifikasi Grafena Mg/sa Wall-core Sebagai Komposit Perubahan Fasa Google Scholar 👨‍🔬 S Gea, V Purwandari 📚 Lantanida Journal 8 (1), 53-63, 2020	2020
190	Thermal behavior, mineral phase, and microstructure characteristics of Na2Mn3O7 synthesized from MnO2 and MnCl2 via a low-cost, simple conventional … Google Scholar 👨‍🔬 MH Ayu, S Kerista, GEA Saharman, N Zikri, S Rifki, S Bambang 📚 Journal of the Ceramic Society of Japan 128 (11), 970-976, 2020	2020
191	Efek Penambahan Ekstrak Cassava (M. Esculenta Crantz) pada Bahan Bleaching Terhadap Elemen Mineral dan Morfologi Enamel pada Gigi-Gigi Diskolorasi Ekstrinsik (In Vitro) Google Scholar 👨‍🔬 T Abidin, S Gea 📚 Universitas Sumatera Utara, 2019	2019
192	Improvisation of Mechanical Properties on Natural Rubber Latex Nanocomposites with Additioning of Cellulose Nanocrystals (CNCs) Percolated by Carbon Nanotubes (CNTs) in Various … Google Scholar 👨‍🔬 AH Siregar, S Gea, DA Barus, N Panindia 📚 Proceedings of The 5th Annual International Seminar on Trends in Science and …, 2019	2019
193	Mechanical Properties Optimization of Cellulose Nanofiber/Graphene Oxide Nanocomposite Produced by Mixing Method Google Scholar 👨‍🔬 A Warman, S Gea, DY Nasution, A Sembiring, YA Hutapea, N Panindia	2019
194	Fluorescent Property of Carbon Nanodots Synthesized by Microwave Method from Crystal Nanocellulose as Precursor Google Scholar 👨‍🔬 M Marpongahtun, S Gea, Y Muis, A Andriayani 📚 Annual International Seminar on Trends in Science and Science Education, 2019	2019
195	Briquettes manufacturing: mechanisation of briquette productions at SME santan coco Google Scholar 👨‍🔬 S Gea, DAB Diana, EJ Elisa, AW Aditia 📚 ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat 4 (2), 187-191, 2019	2019
196	CONVERSION OF METHYL ESTER FATTY ACID FROM RICE BRAN OIL INTO FUEL FRACTION VIA HYDROCRACKING REACTION OVER ZEOLITE CATALYST SUPPORTED OF Ni, Co AND Mo METALS Google Scholar 👨‍🔬 M Zubir 📚 Rasayan Journal of Chemistry, 2019	2019
197	Penentuan Bilangan Iodin dan Bilangan Peroksida pada Crude Palm Oil (CPO) di Pusat Penelitian Kelapa Sawit (PPKS) Google Scholar 👨‍🔬 S Gea 📚 Universitas Sumatera Utara, 2018	2018
198	Fabrication and characterization of natural rubber composite (sir 5)/organo-montmorillonite using cetil trimetil ammonium bromide as a surface modifier Google Scholar 👨‍🔬 Tamrin, S Gea, D Nasution 📚 Journal of Physics: Conference Series 1116 (4), 042040, 2018	2018
199	Pembuatan Nanokomposit Polivinil Alkohol/Nanoserat Selulosa yang Diisolasi dari Tandan Kosong Sawit dengan metode ledak uap yang dihidrolisis dengan HCl 10% Google Scholar 👨‍🔬 S Gea, Y Muis	2017
200	Isolasi Nanoserat Selulosa dari Tandan Kosong Sawit Menggunakan Metode Ledak Uap dan Dihidrolisis dengan HCL 10% Google Scholar 👨‍🔬 S Gea, DY Nasution 📚 Universitas Sumatera Utara, 2017	2017
201	Pembuatan Nanokomposit Polivinil Alkohol/Nanoserat Selulosa Yang Diisolasi Dari Tandan Kosong Kelapa Sawit (Elaeis guineensis Jack) Dengan Metode Ledak Uap Google Scholar 👨‍🔬 DI Cherlina, S Gea, H Nainggolan 📚 Jurnal Kimia Mulawarman 14 (2), 120-126, 2017	2017
202	Pemanfaatan Limbah Kopi Sebagai Dasar Pembuatan Fluorescent Carbon Nanoparticles (F-CNPs) melalui Oksidasi Soot Dengan HNO3 Encer Google Scholar 👨‍🔬 S Gea, B Wirjosentono	2017
203	Pengolahan dan Karakterisasi Bentonit Alam Aceh Sebagai Pengisi Nanokomposit Polipropilena-Montmorillonit Google Scholar 👨‍🔬 B Wirjosentono, S Gea 📚 Pengolahan dan Karakterisasi Bentonit Alam Aceh Sebagai Pengisi Nanokomposit …, 2016	2016
204	Pembuatan Nanokomposit Poliuretan Berbasis Minyak Kelapa Sawit dengan Nanopartikel Montmorillonit Organik sebagai Bahan Cat Google Scholar 👨‍🔬 H Agusnar, T Rihayat, S Gea 📚 Universitas Sumatera Utara, 2015	2015
205	Pembuatan Scaffold Dari Kitosan Belangkas (Tachypleus Gigas) Untuk Menumbuhkan Sel Fibroblast Pada Rekayasa Jaringan Google Scholar 👨‍🔬 H Agusnar, S Ilyas, S Gea 📚 Pembuatan Scaffold Dari Kitosan Belangkas (Tachypleus Gigas) Untuk …, 2015	2015
206	Penentuan Kadar Nitrogen Dioksida di Udara Ambien dengan Metode Griess Saltman dengan Menggunakan Spektrofotometer UV-Visbel Google Scholar 👨‍🔬 S Gea 📚 Penentuan Kadar Nitrogen Dioksida di Udara Ambien dengan Metode Griess …, 2015	2015
207	Isolasi Nanokristal Selulosa Dari Tongkol Jagug (Zea mays L) Dengan Metode hidrolisa Menggunakan Pelarut Dimetil Asetamida/Litium Klorida (DMAc/LiCl) Google Scholar 👨‍🔬 S Gea 📚 Isolasi Nanokristal Selulosa Dari Tongkol Jagug (Zea mays L) Dengan Metode …, 2014	2014
208	PENGGUNAAN NANOPARTIKEL MONTMORILONIT YANG DIMODIFIKASI DENGAN POLIETILEN GLIKOL PADA PEMBUATAN FILM BIODEGRADABEL BERBASIS PATI UBI KAYU Google Scholar 👨‍🔬 H Nainggolan, S Gea 📚 Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan 2 (1), 10-18, 2014	2014
209	PENGARUH KECEPATAN PUTARAN DAN POST-HEATING TERHADAP UKURAN KRISTAL NANOPARTIKEL FILM TIPIS ZnO Google Scholar 👨‍🔬 N Siregar, E Marlianto, S Gea, N Taufiqu	2014
210	Peningkatan Sifat Mekanik dan Termal Kayu Kelapa Sawit dengan Teknik Kompregnasi Reaktif Google Scholar 👨‍🔬 W Hutabarat, L Widiarti, B Wirjosentono, S Gea	2014
211	Preparation and Characterization of Nanocrystalline Cellulose from Sugar Palm Bunch (Arenga Pinnata (Wurmb) Merr.) Google Scholar 👨‍🔬 Sumaiyah, B Wirjosentono, Karsono, MP Nasution, S Gea 📚 International Journal Of PharmTech Research 6, 814-820, 2014	2014
212	INFLUENCE OF CONCENTRATION AND POST-HEATING TO THE CRYSTAL SIZE AND OPTICAL PROPERTIES OF ZnO THIN FILMS Google Scholar 👨‍🔬 N Siregar, E Marlianto, S Gea, N Taufiqu	2014
213	Poly (s-Caprolactone) and Bacterial Cellulose as a''Reinforcing Agent' Google Scholar 👨‍🔬 S Gea, CT Reynoldsz, N Roohpur, N Soykeabkaew	2013
214	EXTRACTION OF CELLULOSE AND PREPARATION OF NANOCELLULOSE FROM PALM EMPTY FRUIT BUNCHES FIBERS Google Scholar 👨‍🔬 BW Adriana, SG Thamrin, R Jalal, E Nuryanto 📚 Proceeding of International Conference on Drug Development of Natural …, 2012	2012
215	Nonporous Chitosan/Collagen Scaffold for Skin Tissue Engineering Google Scholar 👨‍🔬 H Agusnar, S Gea, S Ilyas 📚 Proceedings of The Annual International Conference, Syiah Kuala University …, 2012	2012
216	Pembuatan Elektroda Selektif? Ion Cu (II) Dari Kitosan-Polietilen Oksida Google Scholar 👨‍🔬 S Gea, Andriayani, S Lenny 📚 Pembuatan Elektroda Selektif? Ion Cu (II) Dari Kitosan-Polietilen Oksida, 2005	2005
217	Catalytic Hydrocrackking Minyak Biji Karet Menjadi Fraksi Bahan Bakar Cair Dengan Katalis Zeolit Y Karakterisasi, dan Uji Aktivitas Katalis Zeoliy Y Terembankan LogamNi dan NiMo Google Scholar 👨‍🔬 JL Sihombing, A Kembaren, AN Sabani, A Moondra Zubir, A Wibowo, ...
218	The Effect of Nano Crystalline Cellulose-Filled to Tensile Strength of Oil Palm Trunk Starch-Based Adhesive Google Scholar 👨‍🔬 S Dur, B Wirjosentono, M Ginting, S Gea 📚 Universitas Sumatera Utara, 0
219	Development of Textile Reinforcements based on Flax Fibres for Structural Composite Applications Google Scholar 👨‍🔬 S Gea, S Goutianos, T Eng, M Skrifvars, T Peijs
220	Thamrin and Saharman Gea, 2012, Pembuatan Selulosa Asetat dari? Selulosa yang Diisolasi dari Tandan Kosong Kelapa Sawit Google Scholar 👨‍🔬 M Harahap 📚 Jurnal FMIPA USU, 0
221	The International Conference on chemical science and technology (ICCST–2020) Google Scholar 👨‍🔬 B Wrijosentono, S Al-Malaika, TD Trinh, N Skeabkaew, SB Sembiring, ...
222	CNF/AgNP/chitosan Film With Antimicrobial and Antihemolytic Properties for Wound Healing Google Scholar 👨‍🔬 PAZ Hasibuan, M Tanjung, S Gea, KM Pasaribu, M Harahap, ... 📚 Available at SSRN 3871593, 0
223	ICIESC-1 Google Scholar 👨‍🔬 BH Siregar, I Dewi, A Andriani, W Chaiphaksa, P Limkitjaroenporn, ...
224	Aparatus untuk Pembuatan Asap Cair dengan Pemanfaatan Limbah Batok Kelapa Google Scholar 👨‍🔬 S Gea, DA Barus, E Julianti, A Warman, SU Rahayu, RM Sari 📚 Kementerian Hukum dan Hak Asasi Manusia, 0
225	Thermal and Mechanical Properties Analysis of Old Newspaper Deinked using Ultrasound under Alkaline Conditions Google Scholar 👨‍🔬 S Rahayu, S Gea, A Andriayani 📚 SCITEPRESS–Science and Technology Publications, 0
226	Kimia Kayu dan Modifikasinya Google Scholar 👨‍🔬 S Gea 📚 USUpress, 0
227	Keputusan Dekan Fakultas MIPA Universitas Sumatera Utara tentang Pengangkatan Tim Penguji Ujian Tertutup Disertasi Mahasiswa Program Doktor (S3) Program Studi Ilmu Kimia … Google Scholar 👨‍🔬 S Gea 📚 Universitas Sumatera Utara, 0
228	Skema Penelitian Terapan Unggulan Perguruan Tinggi Nomor: 2/UN5. 2.3. 1/PPM/KP-DRPTM/TI/2022 dengan Judul Penelitian: Penyediaan Pembalut Luka Ulkus Diabetikum Berbasis … Google Scholar 👨‍🔬 S Gea 📚 Universitas Sumatera Utara, 0
229	Pengantar Matematika untuk Kimia Google Scholar 👨‍🔬 S Gea, M Yanti 📚 USU press, 0
230	Metode untuk Pembuatan Katalis pada Proses Perengakahan Minyak Biji Karet Google Scholar 👨‍🔬 JL Sihombing, S Gea, B Wirjosentono, ANP Pulungan 📚 Kementerian Hukum dan Hak Asasi Manusia, 0
231	Fabrication of Composite Nanofibre PEO/Lignin for Exhaust Gas Emissions by Electrospinning Google Scholar 👨‍🔬 G Nainggolan, S Gea, M Marpongahtun, M Harahap, D Dellyansyah 📚 SCITEPRESS–Science and Technology Publications, 0
232	Optical Study of Graphene Quantum Dots from Sawahlunto Coal Graphite Google Scholar 👨‍🔬 D Dellyansyah, S Gea, A Andriayani, M Harahap, G Nainggolan 📚 SCITEPRESS–Science and Technology Publications, 0
233	Pioneering Bio-Oil Extraction: The Role of Transition Metal Oxide Zeolite Catalysts in Co-Pyrolyzing Palm Fronds and Hdpe Google Scholar 👨‍🔬 MI Hasibuan, S Gea, S Sarker, DA Barus, M Supeno, AK Pinem, ... 📚 Muhammad Afdhal and, Andriayani, Pioneering Bio-Oil Extraction: The Role of …, 0
234	One-Stage Improvement of Bio-Oil Through Hydrodeoxygenation with the Addition of Ethanol Solvent Using a Mordenite-Based Ni Metal Catalyst Google Scholar 👨‍🔬 MI Hasibuan, K Wijaya, JL Sihombing, AN Pulungan, A Haryono, ... 📚 Muhammad Afdhal and, Rahayu and Gea, Saharman, One-Stage Improvement of Bio …, 0
235	Case Studies in Chemical and Environmental Engineering Google Scholar 👨‍🔬 SA Amaturrahim, IR Saragi, C Simanjuntak, S Gea, B Attaurrazaq
236	SELULOSA Google Scholar 👨‍🔬 S Gea
237	JCIS Open Google Scholar 👨‍🔬 AMA Saputra, M Ibadurrahman, AIY Tok, R Ikhtiari, S Gea, CF Zuhra
238	Nghiên cứu về tác động của khói lỏng khi làm chất đông tụ thay thế đối với chất lượng của cao su vụn Google Scholar 👨‍🔬 S Gea, N Azizah, AF Piliang, H Siregar
239	SIMULTANEOUS DETERMINATION OF PROFENOFOS, DIAZINON, AND CHLORPYRIFOS IN TERNARY PESTICIDE MIXTURES USING MEAN CENTERING OF RATIO SPECTROPHOTOMETRY Google Scholar 👨‍🔬 S Yuliasmi, J Muchlisyam, S Gea
240	The Utilization of Alumunium Waste as Metal Agent to Improve Electrical Characteristics of Biochar-Based Flexible Film Google Scholar 👨‍🔬 AFR Piliang, DS Lubis, PWD Purba, V ES, S Gea
241	Exploring the Thermal Stability of Bacterial Cellulose–Cationic Cassava Starch–Carnauba Wax Composite as a Potential Sustainable Battery Separator Google Scholar 👨‍🔬 TCL Ndruru, CDB Sidauruk, MI Hasibuan, E Oktavia, R Goei, S Gea
242	Physical Characteristics of Pyrolytic Bio-Oil Synthesized from Pericarp Mahogany (Swietenia mahogany) with Water Hyacinth Biochar as Catalyst Google Scholar 👨‍🔬 AFR Piliang, PWD Purba, DS Lubis, CD Sidauruk, VES Gulo, S Salsabila, ...
243	Atmospheric Influence of Nitrogen and Hydrogen in the Co-Pyrolysis of Oil Palm Trunk Biomass and Waste Cooking Oil Google Scholar 👨‍🔬 SH Zebua, L Bawamenewi, S Gea
244	The Assessment of Probiotic to Inhibition of Glucosyltransferase Enzyme of Streptococcus Mutans Atcc25175 Google Scholar 👨‍🔬 S Gea, BA Gani 📚 International Journal of Innovative Science and Research Technology, 0
245	The Manufacture of Palm Oil-Based Polyurethane Nanocomposite with Organic Montmorillonite Nanoparticle as Paint Coatings Google Scholar 👨‍🔬 S Gea

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Saharman Gea

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245

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362

Investigation into the structural, morp...

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