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All Journal International Journal of Public Health Science (IJPHS) HAYATI Journal of Biosciences SAINS DAN MATEMATIKA JURNAL KIMIA SAINS DAN APLIKASI Microbiology Indonesia AcTion: Aceh Nutrition Journal JKPK (Jurnal Kimia dan Pendidikan Kimia)
Agustina L.N. Aminin
Department Of Chemistry, Faculty Of Sciences And Mathematics, Universitas Diponegoro, Jl. Prof. Soedarto No.50275, Tembalang, Semarang City, Central Java, 50275
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Engineering Health Professions Immunology & microbiology Mathematics Medicine & Pharmacology Public Health

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The effect of soybean tempeh and gembus tempeh on obesity parameters, blood glucose, and short-chain fatty acids Sunarti, Sunarti; Aminin, Agustina LN; Rachmawati, Banundari; Sulchan, Mohammad
AcTion: Aceh Nutrition Journal Vol 10, No 4 (2025): December
Publisher : Department of Nutrition at the Health Polytechnic of Aceh, Ministry of Health

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30867/action.v10i4.2997

Abstract

Obesity contributes to hyperglycemia and metabolic dysfunction globally. Soybean and gembus tempeh, traditional Indonesian fermented foods, contain distinct dietary fiber compositions that may differentially influence metabolic outcomes through short-chain fatty acid (SCFA) production. However, comparative evidence regarding their metabolic effects is limited. This study aimed to compare the effects of soybean and gembus tempeh on obesity parameters, fasting blood glucose, and SCFA profiles in a rat model of hyperglycemic obesity. Methods: A randomized controlled pre–post trial was conducted at the Food and Nutrition Study Center, Universitas Gadjah Mada (April–June 2019). Forty-two rats were assigned to seven groups: normal, hyperglycemic-obese + AIN-93, AIN-93 + gembus tempeh, AIN-93 + soybean tempeh, high-fat high-fructose diet (HFFD), HFFD + gembus tempeh, and HFFD + soybean tempeh. The obesity index, fasting blood glucose, and SCFA concentrations were measured. Both types of tempeh significantly reduced the obesity index and fasting glucose levels in rats fed either the AIN-93 or HFFD diet, with greater reductions observed in the AIN-93 group (p < 0.001). Butyrate levels were significantly higher in the tempeh-supplemented groups than in the control group (p < 0.01), whereas propionate levels did not differ significantly (p = 0.079). In conclusion, soybean tempeh and gembus tempeh improved fasting glucose levels, obesity index, and SCFA production in hyperglycemic-obese rats. Gembus tempeh demonstrated a greater effect on reducing obesity index and fasting blood glucose than soybean tempeh.
Characterization of Biosurfactants from Endophytic Bacteria Isolated from Geothermal Fern Leaves D9 Fadilla, Shobakhatun Nur; Cahyono, Bambang; Aminin, Agustina L. N.
Jurnal Kimia Sains dan Aplikasi Vol 29, No 2 (2026): Volume 29 Issue 2 Year 2026
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.29.2.111-118

Abstract

Biosurfactants are surface-active compounds synthesized by microorganisms. These compounds offer several advantages, including low toxicity, high compatibility, and biodegradability. Biosurfactants can be isolated relatively quickly, a property that renders them potentially applicable in industrial settings. One type of microorganism that produces biosurfactants is endophytic bacteria, which live within plant tissues. The present study focuses on the characterization of biosurfactants produced by endophytic bacteria isolated from geothermal ferns in the area around the Gedong Songo hot spring in Semarang Regency. Isolate 9 (D9) demonstrated the optimal oil-spreading capability and was consequently selected for further production and characterization. The optimal growth curve for biosurfactant production by isolate D9 (BS-D9) occurred in the early stationary phase, approximately 132 hours post-inoculation, with an oil-spreading diameter of 5.1 centimeters. The emulsification index (E24) of BS-D9 reached 95%, which is nearly equivalent to SDS at 1000 ppm, suggesting a high emulsification capacity. The methylene blue test indicated that BS-D9 is an anionic biosurfactant, whereas the negative Biuret test result indicated that it does not belong to the lipopeptide group. Fourier-transform infrared (FTIR) spectroscopy indicates that BS-D9 falls within the glycolipid category. This classification is supported by a distinctive absorption peak corresponding to glycosidic bonds, potentially of the rhamnolipid type. Rhamnolipids are widely recognized for their high emulsification efficiency, stability, and environmental compatibility, making them attractive for various industrial applications. These results indicate that BS-D9 has potential applications as a surface-active agent with environmentally friendly properties.
Co-Authors . AKHMALOKA Abdul Hamid A. Toha Akhmaloka Akhmaloka Amat Rifai Ambariyanto Ambariyanto Annisa Nur Aini Annisa Rachma Bambang Cahyono Banundari Rachmawati Banundari Rahmawati Budi Putri Ayu Christina Elsa Niron Christina Setyadewi M. David Hamonangan Sinaga Didik S. W. Dita Wahyuningsih, Dita Fadilla, Shobakhatun Nur Fatria Isrami FIDA MADAYANTI H. M. Mochtar Hendro Pramono Ifsantin Nihaya Irma Yunitasari Ken Ima Damayanti Khabibi Khabibi Khairul Anami Khamdan Ali Al Bashori Kunti Nadiyatan S. Muthia LAKSMI AMBARSARI Linda Suyati Luchman Hakim M. Suzery Mahreta Suhartanti Maulida Indriyaning Ratri Melly Wahyuningsih Moch Syaiful Alam Mohammad Sulchan Mukhammad Asy&#039;ari Nies S. Mulyani Nies Suci Mulyani Nor Sri Inayati, Nor Sri Nur Ismawati, Nur PINGKAN ADITIAWATI Purbowatiningrum Ria Sarjono Puri Katulistiwasari Rizqi Nabilatul Lailiya A, Rizqi Nabilatul Rosyida Awalia Safitri Sriatun Sriatun Suhartana Suhartana Sulasiyah Sulasiyah Sunarti Sunarti Sunarti Sutiman B. Sumitro Titis Oktafiana Poppy Widodo Widodo Wihda Wihdatul Hidayah, Wihda Wihdatul Wuryanti Wuryanti