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All Journal Jurnal Natur Indonesia Prosiding Molekul: Jurnal Ilmiah Kimia Molekul: Jurnal Ilmiah Kimia
Dian Riana Ningsih
Universitas Jenderal Soedirman
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology

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KARAKTERISASI ENZIM AMILASE DARI BAKTERI Bacillus amyloliquefaciens Ningsih, Dian Riana; Rastuti, Undri; Kamaludin, Ridlwan
Prosiding Vol 3, No 1 (2012)
Publisher : Prosiding

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Abstract

Enzim Amilase merupakan salah satu jenis enzim yang berperan penting dalam industri. Enzim amilase digunakan untuk menghidrolisis pati menjadi molekul karbohidrat yang lebih sederhana, yaitu dekstrin, maltosa dan glukosa. Industri yang menggunakan amilase antara lain: dalam industri kertas, industry detergen, industry tekstil, industry obat dan industri roti dan kue. Bacillus amyloliquefacien merupakan salah satu bakteri yang dapat menghasilkan amilase. Tujuan dari penelitian ini adalah menentukan aktivitas enzim amylase dan mengkarakterisasi sifat biokimia enzim amylase dari B. amyloliquefaciens. Tahapan penelitian ini adalah penentuan waktu produksi optimum enzim amylase, produksi amylase dan penentuan aktivitas enzim amylase pada berbagai suhu dan pH. Penentuan aktivitas amylase menggunakan metode Nelson Somogyi. Hasil penelitian menunjukkan bahwa enzim amylase yang dihasilkan oleh B. amyloliquefaciens mempunyai waktu produksi optimum pada jam ke 24 (1.4986 U/ml), temperature optimum 30-60 oC dan pH optimum 6-7.
Hidrolisis Pati Ganyong (Canna edulis) dengan Amilase Bakteri Flavobacterium sp. PTBT I untuk Produksi Bioetanol Ningsih, Dian Riana; Zusfahair, Zusfahair; Fatoni, Amin
Jurnal Natur Indonesia Vol 15, No 2 (2013)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (205.385 KB) | DOI: 10.31258/jnat.15.2.92-98

Abstract

Bioethanol is an alternative energy of fuels produced from vegetable materials. Vegetable materials that can be used as rawmaterial for bioethanol is ganyong because it contains 22.60 g starch in 100 g ganyong. The production of bioethanol fromstarch material consisted of two steps, hydrolysis and fermentation. One of the steps to increase the value of bioethanolfrom starch of ganyong was hydrolysis process using thermostable amylase enzyme isolated from Flavoacterium sp.PTBT I bacteria was isolated from hot spring of Pancuran Tujuh Baturraden. The aim of this research was to use thermostableamylase to hydrolyze starch of ganyong and glucose produced to result bioethanol. The result of this research showed thatthe optimum condition hydrolysis starch of ganyong was using thermostable amylase acquired at substrate concentrationof 3% (b/v), and incubation time of about 75 minutes. The value of bioethanol increased with time of fermentation, from thefirst to fourth day, which was 0.8361; 2.2379; 5.7590 and 10.5787% (v/v), respectively.
Determination of Cu and Pb concentrations based on urease activity inhibition of Durio zibethinus L. seeds Zusfahair, Zusfahair; Fatoni, Amin; Ningsih, Dian Riana; Riapanitra, Anung
Molekul Vol 16, No 2 (2021)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (217.71 KB) | DOI: 10.20884/1.jm.2021.16.2.736

Abstract

The determination of heavy metal concentrations has been carried out using sophisticated instruments, and therefore a simple and reliable alternative method is needed as a comparison. The study aimed to determine Cu and Pb concentration of standard solution using the urease activity inhibition method of Durio zibethinus L.  seeds.  The research started with urease extraction from Durio D. zibethinus L. seeds. The activity of the obtained extract was determined using the Nessler method. The optimum substrate concentration was also determined. Urease activity inhibition was carried out using various metal solution concentrations, which continued by plotting a log graph of urea concentration vs. %inhibition. The obtained graph would then determine the metal concentration in a synthetic water sample. The data was then compared to the measurement, determined by the Atomic Absorption Spectrophotometry (AAS) method. Results of the study showed that the urease activity of D. zibethinus L.seeds was 296.774 U/mL. Urease activity was optimum at a urea concentration of 0.3 M. The comparison Cu, and Pb concentration determination using the urease inhibitory activity and AAS methods showed no significant difference at 95% confidence level. This research showed that urease of D. zibethinus L. seed could be used to determine Cu and Pb's concentration based on its inhibiting activity.
Ointment Formulation of Arumanis Mango (Mangifera indica L.) Leaf Extract with Chitosan Tripoliphosphate Matrix as Antibacterial Dian Riana Ningsih; Anung Riapanitra; Zusfahair Zusfahair; Uyi Sulaeman; Istinganatun Khoeriyah
Molekul Vol 18 No 1 (2023)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2023.18.1.5725

Abstract

This report presented the synthesis of Arumanis mango (Mangifera indica L.) leaf extract with chitosan tripolyphosphate matrix and its antibacterial activity. This research aimed to obtain an ointment formulation from mango leaf extract with chitosan tripolyphosphate matrix, to figure out the characteristics, including the particle morphology, and to determine the optimum formulation and the characterization of the antibacterial ointment. The research showed that extract morphology with chitosan tripolyphosphate was uneven-edge aggregates. Antibacterial tests were conducted on P. acnes and E. coli bacteria. The formula giving the greatest antibacterial activity was further utilized for the ointment preparations and then was characterized for 16 days. Formula C (chitosan and NaTPP 1: 0.0992(%)) gave the most excellent inhibition zone for P. acnes and E. Coli bacteria, at 7.94 mm and 10.02 mm, respectively. The obtained ointment preparation was white color homogeneous semi-solid with protective properties. The spreading power of the ointment was 5.25 – 6.25 cm, with the adhesive power of 1 – 5 seconds and pH of 6.0 – 6.4. The ointment's antibacterial activity was tested against P. acnes and E. coli bacteria using the formation of inhibition zone method. The activity of ointment prepared on day one against P. acnes and E. coli was at 14.03 mm and 14.24 mm, respectively, while the activity on day 16 against P. acnes and E. coli was at 9.33 mm and 9.98 mm, respectively.
Co-Authors AMIN FATONI Anung Riapanitra Anung Riapanitra Istinganatun Khoeriyah Ridlwan Kamaludin Undri Rastuti Uyi Sulaeman zusfahair zusfahair Zusfahair Zusfahair, Zusfahair