Pengaruh Chemical Treatment NaOH pada Natural Cellulose Fiber Reinforcement From Oil Palm Frond

Pada penelitian ini berfokus tentang pengaruh perlakuan alkali pada karakterisasi ikatan serat Oil Palm Frond Fiber (OPFF) dalam matriks polimer, dan kemampuan matriks membasahi serat (wettability). OPFF menjalani proses perlakuan alkali dengan presentase konsentrasi NaOH yang berbeda dengan variasi 5%, 10%, dan 15%. Semua perlakuan dilakukan pada kondisi suhu kamar dengan lama perendaman 2 jam. Dimensi serat meliputi diameter serat, densitas serat dan wettability dari OPFF yang diberi perlakuan kimia untuk dilakukan pengujian. Hasil dari pengujian menunjukkan bahwa perlakuan alkali dapat secara efektif menghilangkan bahan non selulosa dan meningkatkan bonding serat antarmuka. Pada penelitian ini ditemukan bahwa sifat antarmuka OPFF-Resin Epoxy meningkat setelah perlakuan alkali dan berkurangnya diameter serat yang dapat meningkatkan keseragaman serat untuk meningkatkan sifat mekanik dari serat. Memang konsentrasi alkali optimal dihasilkan pada konsentrasi 5% karena memiliki sudut kontak terkecil yaitu 26,49° dan diamater terkecil didapatkan dari variasi NaOH konsentrasi 15% yaitu 0,31±0,08  dan density tertinggi didapatkan pada variasi NaOH konsentrasi 15% sebesar 1,537±0,045 g/cm3 dalam hal karakterisasi ikatan dan terutama disebabkan oleh pengurangan bagian amorf dari sera

The Optimal Condition of Dry-Heat Stabilization using Oven on Phenolic Content and Antioxidant Activity of Rice Bran: A Meta-Analysis

Rice bran, a beneficial by-product of rice milling, is a rich source of nutrition, containing bioactive compounds such as phenolic compounds and exhibiting high antioxidant activity. Due to these properties, rice bran is a valuable ingredient for functional foods and animal feed. However, its short shelf life caused by rapid rancidity often hinders its use. Dry heating is an effective method to increase the longevity of rice bran. It can be stabilized by heating rice bran to the appropriate temperature, retaining its nutritional value and prolonging its shelf life. This meta-analysis aimed to determine the optimal temperature and time duration for dry-heat stabilization using an oven on Free Phenolic Content (FPC), Bound Phenolic Content (BPC), Total Phenolic Content (TPC), and Antioxidant Activity (AA) of rice bran. A total of 7 articles and 34 experiments were included after applying specified screening criteria. Results indicated that temperature and time duration of dry-heat stabilization had a significant effec

Investigating English Students’ Motivation in Speaking Class during New Normal Era

Motivation is one of the most important factors and greatly influences the learning process. The purpose of this study was to determine how the level of motivation of students in the speaking class during the new nomal era, namely the second semester students of the English Department of IAIN Bengkulu. This study used a descriptive quantitative approach. The techniques used in collecting data were questionnaire and interview. The questionnaire consists of 36 questions divided into intrinsic and extrinsic motivation. The data are presented statistically using percentage, frequency, arithmetic mean, and standard deviation division. The results showed that the mean score of intrinsic motivation (3.89) was higher than the average score of extrinsic motivation (3.39). However, the overall motivation average of 3.68 is considered a high level of motivation despite currently studying in the Covid-19 pandemic conditions. The results of this study indicate that the majority of students learn English in the speaking class because of intrinsic motivation. They actively speak and learn English because of their own inner desires. Based on the findings of this study, several relevant learning implications and useful motivations are recommended to increase student motivation

Utilization of Coffee Pulp Waste Composted with Cellulolytic Actinomycetes to Enhance Chili Plant Growth

The abundant volume of coffee bean pulp as a  by-product of the post-harvest processing is an important source of soil organic matter if it is properly handled. The alternative way to use coffee bean pulp waste to reduce the impact of environmental pollution is composting. This study aims to determine the ability of actinomycetes to degrade coffee pulp, to identify the physical and chemical characteristics of coffee pulp compost, and to evaluate the effect of coffee pulp compost on chili plant growth. The results showed that 7 isolates of actinomycetes were able to hydrolyze coffee pulp in vitro with a hydrolytic index of 1.7-3.81. The treatment of coffee pulp compost with the addition of a starter of cellulolytic actinomycetes (P2) at the end of the three-week incubation period showed the highest organic N (25 mg/kg), P (7.05 mg/kg), and K (33 mg/kg), t compared to other treatments. The effect of giving coffee pulp compost towards the growth of chili plants shows that  the coffee pulp composted with zeolite 5% (w/w) increased the height of the chili plants by 37.6%, while in coffee pulp composted by cellulolytic actinomycetes 5% (v/w) increased the number of leaves by 96% and plant biomass by 25%.  Based on the results of this research, coffee pulp compost has the potential to be used as biological fertilizer to increase plant growth, both composted by zeolite and cellulolytic actinomycete

Pengaruh Frekuensi Pemberian POC Hasil Biokonversi Lalat Hermetia illucens terhadap Produksi Hijauan, Rasio Daun Batang, dan Rasio Tajuk Akar Rumput Pennisetum purpureum cv. Mott

Penelitian ini bertujuan untuk mengetahui pengaruh frekuensi pemberian pupuk organik cair hasil biokonversi lalat Hermetia illucens terhadap produksi hijauan, rasio daun batang, dan rasio tajuk akar rumput gajah mini (Pennisetum purpureum cv. Mott). Penelitian ini dilakukan di Lahan Laboratorium Tanaman Makanan Ternak, Fakultas Peternakan, Universitas Padjadjaran pada Januari sampai Maret 2021. Penelitian ini merupakan penelitian eksperimental dengan menggunakan metode Rancangan Acak Lengkap (RAL) yang terdiri atas 4 perlakuan dengan 5 ulangan sebagai berikut :  frekuensi 1 kali pemupukan (P1), frekuensi 2 kali pemupukan (P2), frekuensi 3 kali pemupukan (P3), dan frekuensi 4 kali pemupukan (P4). Hasil analisis statistik menunjukkan bahwa frekuensi pemberian POC berpengaruh nyata (P0,05) terhadap berat kering daun, batang, dan tajuk rumput gajah mini. Frekuensi pemupukan sebanyak 2 kali (P2) merupakan hasil yang terbaik untuk produksi hijauan, rasio tajuk akar, dan rasio daun batang rumput gajah mini

HEPATOPROTECTIVE EFFECTOF GAMAVUTON-O AGAINST D-GALACTOSAMINE/LIPOPOL YSACCHARIDE-INDUCED FULMINANT HEPATIC FAILURE

The objective of this study is to determine the hepatoprotective effect of GVT-O(one of curcumin analogues) against liver damage in rat-induced D-galactosamine (D-GaIN)/lipopolysaccharide (LPS) as a model of fulminant hepatitis. In the study D-GaIN/LPS elevated serum GPTactivity that indicate a particular occurrence of liver damage due to depletion of UTP and UDP-glucuronic acid. Administration of GVT-O(10 mg/kg) showed decreased enzyme activity of SGPT/SGOTbut had no effect on serum ALP and total bilirubin levels, whereas at doses of 20 and 40 mg/kg, the protective effect of GVT-Owas decrease. The glutathione content in the D-GaIN/LPS(0.76±0.07) mol!g liver content was found lower than controls (0.90 ± 0.03) mol!g liver. Administration of GVT-O dose of 10, 20 and 40 mg/kg restored glutathione content returned to normal leVels. The results showed that treatment of GVT-O showed nO/ieffecton TBARSand catalase activity. Treatment of D- GaIN/LPS, indicating the trend of increased TNF-a, although statistically not significant, while the administration of GVT-O showed a tendency to decrease the concentration of TNF-a. All findings of the results indicated that the GVT-Omainly lower dose (10 mg/kg) showed hepatoprotective action in rat model of fulminant hepatitis induced by D-GaIN/LPS.The results indicated that the mechanism of hepatoprotective effect of GVT-Ois not via antioxidant properties of GVT-O. However, further studies are necessary to explain the molecular mechanism of hepatoprotective effect of GVT-0