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All Journal Wikrama Parahita : Jurnal Pengabdian Masyarakat TEKNOLOGIA
Ayu Dahliyanti
Universitas Pertamina
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering Mathematics Social Sciences

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Journal : TEKNOLOGIA

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PRODUKSI DAN KARAKTERISASI SILIKA SEBAGAI MATERIAL MULTIFUNGSI DARI LIMBAH JAGUNG Ayu Dahliyanti; Ika Dyah Widharyanti; Catia Angli Curie
JURNAL TEKNOLOGIA Vol 2 No 1 (2019): Jurnal Teknologia
Publisher : Aliansi Perguruan Tinggi Badan Usaha Milik Negara (APERTI BUMN)

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In order to prevent negative environmental impact, high volume of waste generated from corn processing needs to be transformed into a more valuable product. Based on the mineral composition of corn plant, this waste could become a potential source of silica, a multifunctional material with applications in various fields, such as semiconductor, adsorbent technology, catalysis, and lithium ion battery. In this work, corn husks, cobs, and stalks is processed through leaching at various HCl concentration, followed by atmospheric decomposition at moderate temperature to obtain silica for further suitable application. Morphological characteristic is analyzed by SEM images, crystallinity of silica is determined by XRD, while purity and possible organic contaminants are investigated by FTIR. The result shows that corn husks provide the highest silicon dioxide yield at 2.543 wt.%. Powders obtained from corn husks also indicate a higher purity with insignificant metallic or organometallic contaminants, showing closest crystal structure to the mixture of quartz and amorphous phase.
EKSTRAKSI KOLAGEN DARI KULIT IKAN SELAR (Selaroides Leptolepis) DENGAN MENGGUNAKAN METODE LARUT ASAM DENGAN PENAMBAHAN ENZIM PEPSIN DAN PAPAIN Ayu Dahliyanti; Nur Indah Shifani
JURNAL TEKNOLOGIA Vol 4 No 2 (2022): Jurnal Teknologia
Publisher : Aliansi Perguruan Tinggi Badan Usaha Milik Negara (APERTI BUMN)

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Pepsin soluble collagen (PSC) and papain soluble collagen (PaSC) were successfully extracted from the skin of Yellowstripe fish (Selaroides Leptolepis) through the combination of acid and enzymatic method. Collagen was obtained through a four-stage process which consisted of sample preparation, pretreatment, enzymatic extraction and salting out. Extraction was carried out for 12 hours and 24 hours by adding different doses of pepsin and papain enzymes. The highest yield of PSC and PaSC were 18.64% and 4.140% by mass. The as-prepared collagen were then analyzed for moisture content and ash content. Water content from PSC and PaSC were respectively 2.37% and 3.68% and the ash content was 15.87% and 35.89%, respectively. Fourier Transform Infrared (FTIR) analysis for both sample showed that the triple helix structure of collagen could be maintained even after the extraction process. From Differential Scanning Calorimetry (DSC) analysis, it was found that PSC and PaSC denaturation temperatures were of 64.05°C and 82.29°C.
Co-Authors Agung Nugroho Catia Angli Curie Dita Floresyona Gede W.P. Adhyaksa Ika Dyah Widharyanti Nur Indah Shifani Paramita Jaya Ratri Sylvia Ayu Pradanawati Tirta Rona Mayangsari Yose Fachmi Buys Yudi Rahmawan