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All Journal Jurnal Riset Kimia CHEMPUBLISH JOURNAL Jurnal Zarah Akta Kimia Indonesia Jurnal Hilirisasi IPTEKS (JHI) Molekul: Jurnal Ilmiah Kimia
Salim, Emil
Andalas University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Dentistry Education Engineering Health Professions Materials Science & Nanotechnology Public Health Veterinary Other

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Journal : Jurnal Riset Kimia

 1 
PREPARASI DAN MODIFIKASI KIMIA STRUKTUR KITOOLIGOSAKARIDA-2,5-ANHIDRO-D-MANNOFURANOSA (KOSAMF) DARI KITOSAN SERTA UJI ANTIBAKTERI TERHADAP Staphylococcus aureus DAN Escherichia coli Emil Salim; Hasnirwan -; Sanusi Ibrahim; Afrizal -
Jurnal Riset Kimia Vol. 9 No. 2 (2016): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v9i2.279

Abstract

Kitooligosakarida-2,5-anhidro-D-mannofuranosa (KOSamf) dipersiapkan dengan derajat polimerisasi tertentu melalui reaksi nitrous deaminasi dari kitosan parsial N-deasetilasi. KOSamf kemudian diubah menjadi turunan KOSamf dengan mengkopling gugus aldehid yang terdapat pada unit 2,5-anhidro-D-mannofuranosa (amf). KOSamf dengan 3,5-dikloroanilin dan NaBH3CN dalam pelarut buffer ammonium asetat direaksikan melalui metoda one-pot aminasi reduktif untuk menghasilkan turunan KOSamf yang berpotensi sebagai senyawa antibakteri dan antijamur. Struktur kimia dari turunan KOSamf yang telah disintesis dikarakterisasi dengan Spektroskopi FT-IR dan NMR. Senyawa turunan KOSamf memiliki aktivitas sebagai antibakteri terhadap bakteri Staphylococcus aureus dengan zona inhibisi 12,5 mm dan bakteri E. coli dengan zona inhibisi 10,5 mm.
STUDI OPTIMASI EKSTRAKSI KANDUNGAN SENYAWA FENOLIK TOTAL DAN UJI AKTIVITAS ANTIOKSIDAN DARI DAUN MANGGIS (Garcinia mangostana Linn.) Emil Salim; Yogi Afritunando; Nindi Antika Febriana; Mai Efdi
Jurnal Riset Kimia Vol. 10 No. 1 (2019): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v12i2.308

Abstract

This study aims to determine antioxidant activity and total phenolic content of mangosteen leaves in several different solvents. The antioxidant activity test of the extract was determined by the DPPH method and the total phenolic content was determined by the Folin-Ciocalteu method. The phytochemical test of mangosteen leaves showed the presence of phenolic compounds, saponins, triterpenoids and alkaloids. The extraction results increase with increasing water content in methanol, ethanol and acetone. The highest amount of extract was obtained using 50% acetone solvent (34.98 ± 0.17%). Extraction using 100% ethanol showed the highest total phenolic content (614.25 ± 5.58 mg GAE / g extract) and the lowest IC50 value (5.81 mg / L). The results of this study indicate that the use of 50% acetone solvent can optimize the amount of extract and 100% ethanol can optimize the content of total phenolic compounds and antioxidant activity of mangosteen leaves.
Teknik Edible Coating dengan menggunakan Campuran Gel Lidah Buaya dan Ekstrak Daun Psidium guajava L. untuk Mempertahankan Sifat Fisikokimia Buah Jambu Biji Refilda Refilda; Riga Habib Ngestu; Emil Salim; Yefrida
Jurnal Riset Kimia Vol. 13 No. 2 (2022): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v13i2.501

Abstract

The synthetic chemicals is a common substance used to extend the shelf life of postharvest fruit. But it can have health impact. The use of edible coatings from natural ingredients has begun to be developed. Modification of aloe vera gel by guava leaf extract as the edible coating to increase guava fruit shelf life has not been reported yet. Guava fruit coated by several compositions of aloe vera gel and guava leaf extract have been carried out. Observations on physichochemical in fruit on the days 0, 3, 6, 9, 12 and 15 were evaluated. The best quality found on guava fruit treated with the compotition of aloe vera gel:ethanol guava leaf extract: CMC:glycerol (90: 5:0.25: 0.5) on the day 15. It had a weight loss of 9.88%, a spoilage of 3.33%, the decrease of water content 11.61%, titratable acidity 0.5%, total antioxidant 1.08 mg AA/g FW, total phenolic 0.51 mg GAE/g FW, and increase of total dissolved solids 3.01 oBrix. This result was significantly better than the uncoated fruit. It can be concluded that guava leaf extract can be used to maintain the physicochemical properties during storage.
Potensi Antimikroba dan Toksisitas Minyak Atsiri yang Diisolasi dari Biji Jintan (Carum carvi L.) Suryati Suryati; Emil Salim; Gustia Elizar
Jurnal Riset Kimia Vol. 13 No. 2 (2022): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v13i2.551

Abstract

Caraway (Carum carvi L.) is one of the oldest medicinal plants found in various countries such as West Asia, North Africa, Pakistan, India, North America, Northern Europe, Iran, Russia, and Indonesia. This plant has been use for traditional medicines to treat digestive disorders, flatulence, colic in infants, headaches, coughs, hypertension, eczema, pneumonia, diabetes, scabies, mouthwash and as an antiseptic. This plant is reported to contain around 1-9% essential oil in the seeds with various components and potential as bioactive compounds. In this study, essential oils were isolated from caraway seeds and determined their chemical content as well as their antimicrobial and toxicity. Isolation of essential oils was carried out by hydrodistillation and analysis of the chemical components of the isolated essential oils was carried out using the Gas Chromatography-Mass Spectrometry (GC-MS) method. The results of the GC-MS analysis showed the presence of 35 compounds with four main compounds, namely carvone (62.54%), limonene (23.39%), and trans-dihydrocarvone (8.20%). The antimicrobial activity test was carried out using the disc diffusion method, which showed strong activity against Staphylococcus aureus at a concentration of ≥75%, and against the fungus Candida albicans. The results of the toxicity test using the Brine Shrimp Lethality Test (BSLT) method showed that caraway seed essential oil was low toxic against Artemia salina Leach shrimp larvae with an LC50 value 568.3292 mg/L.
Co-Authors -, Yefrida Adlis Santoni Afrizal - Afrizal Afrizal Aisman Aisman Asri Amelia Bustanul Arifin Cesar Wellya Refdi Daimon Syukri Felga Zulfia Rasiana Gustia Elizar Hasnirwan Hasnirwan Ikhsan Gusti Rilma Indah Putri Lestari Ismed Ismed Leidina Zein Lucy Prima Ardi Mai Efdi Nika Rahma Yanti Nindi Antika Febriana Nindi Antika Febriana Norman Ferdinal Novizar Nazir Refilda Refilda Refinel - Riga Habib Ngestu Rini Ramadani Sanusi Ibrahim Silfani Mairanti Suryati Wellyalina, Wellyalina Wini Sukrila Yogi Afritunando Zilfa Zilfa