Garuda - Garba Rujukan Digital

Sintesis dan Karakteristik Membran Komposit Akrilonitril Butadiena Stirena (ABS)-Kitosan Tersulfonasi untuk Direct Metanol Fuel Cell (DMFC) Hidayati, Nur; Mujiburohman, Muhammad; Abdillah, Hamid; Harmoko, Tri; Arimurti, Rizki Dyah
Jurnal Matematika dan Sains Vol 22 No 1 (2017)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Direct Methanol Fuel Cell (DMFC) is a type of fuel cell that converts methanol directly into electrical energy. The commercialization constraints of fuel cells in Indonesia is due to the high cost of manufacturing, including the expensive electrolyte membrane which is one of the important components of fuel cells. Utilization of cheap and abundant local materials such as acrylonitrile butadiene styrene (ABS) and chitosan can reduce the fuel cell manufacturing cost burden. The membrane currently used for DMFC is the Nafion® membrane. The superiority of Nafion® membrane has high ionic conductivity and membrane stability, while Nafion® membrane deficiency is a very expensive price and has a high enough methanol permeability that can lead to a decrease in overall cell voltage performance. This study studied the characteristics of ABS-sulfonated Chitosan membrane membrane with ratio (20:80) and (40:60) prepared on 6-hour, 12 hour, 18 hour, 24 hour sulphonation time variation. The experimental results show a sulfonation time of 24 hours, in the ratio of ABS: Chitosan (20:80 wt) provides membrane characteristics such as water uptake 48.50%, swelling degree 25%, ion exchange chamber 2.030 meq / g, and methanol permeability 2,9336x10 -6 cm2 / s.

Effect of Surfactant Type Modifications, Glucose Inducer Concentrations, and Mineral Sources towards Lipase Enzyme Activity of Aspergillus niger ITBCC L74 on Rice Bran Substrate Ajeng Ardani; Shinta Rismayanti; Hamid Abdillah
Nusantara Science and Technology Proceedings Join Proceeding "Basic and Applied Science Conference (BASC) 2021 & 1st Education Research and Appli
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2021.1101

A surface-active agent is a substance added to a liquid to increase its spreading properties by lowering the surface tension. On the other hand, an inducer is a substance to triggers the production of lipase enzymes from bacteria. This study aims to formulate the microbial growth medium to produce high activity of lipase through modification of surfactant type, glucose inducer concentrations, and mineral sources using Aspergillus niger as a microbial starter and rice bran as substrate. A solid fermentation was built and prepared in this study for lipase production. The titrimetric method using NaOH solution was used to determine mol of free fatty acids per minute, type of surfactant, the optimal glucose concentration, and mineral sources on lipase enzyme activity. Tween 80 and Tween 20 are lipid-based surfactants used in this experiment. The best type of surfactant was Tween 80 with 1% of glucose inducer. It produced a lipase activity of 2.53 U/mL. In contrast, Tween 20 with 0.75% glucose inducer produced a lipase activity of 2.27 U/mL. FeSO4 and CaCl2 were the inorganic mineral sources used in this study. The best result was found at 0.6% of FeSO4, it can generate enzyme activity of 2.13 U/mL.

Optimisasi Sumber Nutrisi dan Waktu Inkubasi untuk Meningkatkan Aktivitas Enzim Lipase dari Aspergillus niger ITBCC L74 pada Substrat Dedak Padi Hamid Abdillah; Ilham Caresa Wardana; Naba Dalayuma Maryama; Muktiari Hasbullah
Prosiding University Research Colloquium Proceeding of The 11th University Research Colloquium 2020: Bidang MIPA dan Kesehatan
Publisher : Konsorsium Lembaga Penelitian dan Pengabdian kepada Masyarakat Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1252.216 KB)

Enzim lipase didefinisikan sebagai enzim yang menghidrolisis asam lemak rantai panjang. Substrat alami enzim lipase terdiri dari trigliserida yang tersusun dari asam lemak rantai panjang. Di Indonesia permintaan enzim untuk memenuhi kebutuhan industri dalam proses fermentasi mengalami peningkatan secara signifikan yang mencapai angka kebutuhan 2500 ton dengan nilai impor sekitar 200 miliar, diperkirakan akan terus meningkat antara 5% hingga 7% setiap tahunnya. Penelitian ini bertujuan untuk menentukan nutrisi optimum pada proses fermentasi padat menggunakan substrat dedak padi dan strain Aspergillus niger karena sudah terbukti cukup baik untuk memproduksi enzim lipase. Variasi penelitian yang digunakan adalah sumber nutrisi berupa sumber nitrogen, sumber mineral anorganik, kadar air substrat dan waktu inkubasi agar menghasilkan enzim lipase dengan aktivitas tertinggi. Hasil penelitian menunjukkan sumber nitrogen terbaik adalah urea 4% dengan aktivitas enzim lipase 1,07 U/mL dan NH4NO3 6% sebesar 1,60 U/mL. Sumber mineral anorganik terbaik adalah FeSO4 0,6% dengan aktivitas enzim lipase tertinggi 3,47 U/mL dan MgSO4 2 mmolar sebesar 0,67 U/mL. Kadar air terbaik adalah 55%, dengan aktivitas tertinggi 1,07 U/mL, sedangkan waktu inkubasi terbaik Aspergillus niger adalah 6 hari dengan aktivitas tertinggi sebesar 1,47 U/mL.

Synthesis of Antimicrobial Silver Nanoparticle Varnish using Moringa Leaf Bioreductor (Moringa Olifiera): Sintesis Pernis Nanopartikel Perak Anti Mikroba dengan Bioreduktor Daun Kelor (Moringa Olifiera) Hamid Abdillah; Muhammad Baharits; Rijal Abidin; Firdaus Rizki Biantoro
Jurnal Kimia dan Rekayasa Vol. 2 No. 2 (2022): Jurnal Kimia dan Rekayasa Edisi Januari 2022
Publisher : Program Studi S1 Teknik Kimia, Fakultas Teknik, Universitas Setia Budi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31001/jkireka.v2i2.38

Silver nanoparticles have stable properties and potential applications especially as anti-microbial agents. The growth of fungi and bacteria on the wood surface can be inhibited by varnishing with silver nanoparticles. The nano-silver particles were prepared by synthesizing silver nitrate at concentration of 1, 3, and 5 mM with Moringa oleifera as a bioreductant. PVA (Polyvinyl Alcohol) as a stabilizer was varied at the levels of 0.5%, 1%, and 2%. In the UV-Vis test, the wave peaks are in the range 395-515 nm, this is in accordance with the characteristics of silver nanoparticles. The addition of 1% PVA to silver nanoparticles provided the best stability among the four concentrations provided by evidence of low maximum wavelength shift after storing. Particle size examination using the Particle Size Analyzer (PSA) showed silver nanoparticles had a size of 75.6 nm. Then the silver nanoparticle solution was applied to the resin varnish. The solution of silver nanoparticles has an effect on the antimicrobial properties of resin varnish, as evidenced by the absence of mold growth in the media with silver nanoparticles added. Abstrak Nanopartikel perak memiliki sifat yang stabil dan aplikasi yang potensial khususnya sebagai agen anti-mikroba. Pertumbuhan jamur dan bakteri pada permukaan kayu dapat dihambat dengan pernis yang diberi bahan nanopartikel perak. Partikel nano-perak dibuat melalui sintesis perak nitrat konsentrasi 1, 3, dan 5 mM dengan bioreduktor daun kelor (Moringa oleifera). PVA (Polivinil Alkohol) sebagai stabilsator divariasikan pada kadar 0,5, 1, dan 2%. Pada pengujian UV-Vis, puncak gelombang berada pada rentang 395-515 nm yang sesuai dengan karakteristik nanopartikel perak. Penambahan PVA 1% pada nanopartikel perak memberikan kestabilan paling baik diantara keempat konsentrasi karena pergeseran panjang gelombang maksimal yang rendah. Pemeriksaan ukuran partikel menggunakan Partikel Size Analyzer ( PSA ) menunjukkan nanopartikel perak memiliki ukuran 75,6 nm. Selanjutnya larutan nanopartikel perak tersebut diaplikasikan pada pernis damar. Larutan nanopartikel perak berpengaruh terhadap sifat anti mikroba pada pernis damar, dibuktikan dengan tidak tumbuhnya jamur pada media yang ditambahkan nanopartikel perak.

Pengaruh Variasi Konsentrasi Tepung Bonggol Pisang Termodifikasi dengan Metode Enzimatis sebagai Bahan Substitusi pada Pembuatan Mi Basah Arum Dewi Widyaningsih; Hamid Abdillah
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

Show Abstract | Download Original | Original Source | Check in Google Scholar

The banana tuber contains high carbohydrates, but it is still rarely used because of the brown color of the flour due to heating. To cover this deficiency, modification with α-amylase enzyme was carried out. The purpose of this study was to obtain a suitable formulation for the manufacture of wet noodles that meet the requirements of SNI quality standards. The treatment variation made was the ratio of 3 tapioca: 9 banana tuber: 48 wheat (80% wheat), 3 tapioca: 6 banana tuber: 21 wheat (70% wheat), 3 tapioca: 5 banana tuber: 12 wheat (60% wheat). The variation of α-amylase enzyme used was 10%, 20%, 30%, 40% with 0% as the control variable. Organoleptic test to determine the most preferred noodle variation. The test parameters were color, aroma and texture. The results showed that the best quality with color and aroma wet noodles were obtained from a combination of 60% with 40% α-amylase enzyme concentration ratio. As the texture parameters were obtained from a combination of 60% wheat with 10% α-amylase enzyme concentration ratio. The results showed that the moisture content of wet noodles had met the SNI 2987:2015 standard, which is below 65%.

Pengaruh Variasi Kosentrasi Tepung Tapioka Termodifikasi Dengan Metode Enzimatis Sebagai Bahan Substitusi Pada Proses Pembuatan Mie Itci Amada Putri; Hamid Abdillah
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

Show Abstract | Download Original | Original Source | Check in Google Scholar

Indonesia has dependency to rice Enough high , so request rice very tall And when happen scarcity rice inside _ country . So needed innovation product For cope problem such , ie Wrong only one replace rice with noodles wet as alternative replacement source carbohydrates . Material raw making noodles wet on study This is flour tapioca modified And flour wheat as material substitution . Expected with use material non- flour basis For product noodles capable replace dependency use flour flour . On study This use variation comparison composition flour tapioca modified And flour different flour _ namely ; (10%:90%, 25 % : 75%, and 30%:70%) use variation concentration enzyme 10%, 20%, 30%, 40%, and 0% as control parameters . Results study show comparison flour tapioca modified influential to noodle water content wet And quality noodles wet include (aroma, elasticity , and color ). Highest water content that is sample noodles wet on ratio of 30% flour tapioca modified and 70% flour wheat with 40% enzyme concentration of 64.54 % . According to Body Standard Indonesian National requirements quality noodle water content good wet is 65%, got concluded that noodles wet fulfil requirements.

Optimisasi Sumber Nutrisi dan Waktu Inkubasi untuk Meningkatkan Aktivitas Enzim Lipase dari Aspergillus niger ITBCC L74 pada Substrat Dedak Padi Hamid Abdillah; Ilham Caresa Wardana; Naba Dalayuma Maryama; Muktiari Hasbullah
Prosiding University Research Colloquium Proceeding of The 11th University Research Colloquium 2020: Bidang MIPA dan Kesehatan
Publisher : Konsorsium Lembaga Penelitian dan Pengabdian kepada Masyarakat Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY

Show Abstract | Download Original | Original Source | Check in Google Scholar

Enzim lipase didefinisikan sebagai enzim yang menghidrolisis asam lemak rantai panjang. Substrat alami enzim lipase terdiri dari trigliserida yang tersusun dari asam lemak rantai panjang. Di Indonesia permintaan enzim untuk memenuhi kebutuhan industri dalam proses fermentasi mengalami peningkatan secara signifikan yang mencapai angka kebutuhan 2500 ton dengan nilai impor sekitar 200 miliar, diperkirakan akan terus meningkat antara 5% hingga 7% setiap tahunnya. Penelitian ini bertujuan untuk menentukan nutrisi optimum pada proses fermentasi padat menggunakan substrat dedak padi dan strain Aspergillus niger karena sudah terbukti cukup baik untuk memproduksi enzim lipase. Variasi penelitian yang digunakan adalah sumber nutrisi berupa sumber nitrogen, sumber mineral anorganik, kadar air substrat dan waktu inkubasi agar menghasilkan enzim lipase dengan aktivitas tertinggi. Hasil penelitian menunjukkan sumber nitrogen terbaik adalah urea 4% dengan aktivitas enzim lipase 1,07 U/mL dan NH4NO3 6% sebesar 1,60 U/mL. Sumber mineral anorganik terbaik adalah FeSO4 0,6% dengan aktivitas enzim lipase tertinggi 3,47 U/mL dan MgSO4 2 mmolar sebesar 0,67 U/mL. Kadar air terbaik adalah 55%, dengan aktivitas tertinggi 1,07 U/mL, sedangkan waktu inkubasi terbaik Aspergillus niger adalah 6 hari dengan aktivitas tertinggi sebesar 1,47 U/mL.

Title

Found 7 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 7 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 7 Documents
Search