Hybrid polymer composites reinforced with synthetic and natural fibers are gaining more interest in current composite technology an effort to promote sustainability without sacrificing the performance of fiber composites. The goal this study is see how stacking sequence carbon ramie fiber, as well orientation affects quasi-static indentation behaviour carbon/ramie epoxy hybrid specimens were made using a hand layup approach followed by hot pressing process. properties reinforcements matrix...

Ramie (Boehmeria nivea) has been reported to have a wide variety of secondary metabolite compounds in its vegetative organ that distinct organic activities. Regarding the chemical composition flowers, there no study considering their pharmacological effects. This research aims determine profile metabolites contained B. nivea flowers employing metabolomics approach. was designed obtain data base from five dissolved fractions ramie flower using Gas Chromatography-Mass Spectrometry (GC-MS/MS)...

The objective of this research is to examine how enable stakeholders live in perfect harmony a company. To achieve this, the employs literature review with an integrative or critical approach. data used secondary collected through documentation techniques. findings indicate three ways ensure that can company: 1) increasing transparency financial reporting by enhancing information disclosure; 2) establishing most efficient contracts using optimal incentive schemes; and 3) creating mechanism...

Mangrove-associated endophytic fungi are producers of secondary metabolites in unique and diverse structures with interesting biological activities such as antiviral, antifungal, antibacterial, anti-inflammatory, cytotoxic agents. Endophytes play an important role the physiological host plants, influencing improvement resistance to stress, insects, nematodes, diseases. In this study, arohynapene A, a polyketide compound, was successfully isolated from mangrove-derived fungus Penicillium...

Homocitrate synthase (HCS) catalyzes aldol-type condensation of acetyl coenzyme A (acetyl-CoA) and α-ketoglutarate (α-KG) to synthesize homocitrate (HC), which is the first committed step in lysine biosynthetic pathway through α-aminoadipate. As known most enzymes catalyzing reactions amino acid pathways, HCS regulated via feedback inhibition by end product, lysine. Here, we determined crystal structures from Thermus thermophilus complexed with α-KG, HC, or In HC complex, C1-carboxyl group...

Abstract. Mulyani Y, Wulandari AP, Sinaga SE, Safriansyah W, Azhari A, Purbaya S, Abdullah FF, Farabi K, Shiono Supratman U. 2023. Antibacterial activities and molecular identification of endophytic fungi isolated from mangrove Avicennia marina. Biodiversitas 24: 6923-6933. This research explored the antibacterial potential marina's (Forssk.) Vierh leaves, stem bark, root, located in Blanakan, Subang District, West Java. The screening process for activity was conducted using Kirby Bauer disk...

In Thermus thermophilus homocitrate synthase (HCS) catalyzes the initial reaction of lysine biosynthesis through α‐aminoadipic acid, synthesis from 2‐oxoglutarate and acetyl‐CoA. HCS is strongly inhibited by lysine, indicating that regulated endproduct at in pathway. also using oxaloacetate place as a substrate, similar to citrate tricarboxylic acid cycle. Several other properties an evolutionary relationship biosynthetic pathway bacterium metabolic pathways are described.

Abstract Background Pathogenic microbes still become obstacles that can reduce the quality of plant growth, including ramie ( Boehmeria nivea ) plants. The study identified microbiome and antagonistic interaction endophytic community from B. is necessary to improve production plant, especially stem organs for fiber materials. Results Twenty isolates microorganisms were obtained roots, stems, leaves, flowers. They using Internal Transcribed Spacer (ITS) region ribosomal (rDNA), its...

Ramie (Boehmeria nivea) is believed to be one of the strongest natural fibers, but it still remains behind synthetic materials in terms tensile strength. In this study, ramie were prepared evaluate modification crosslinking effect fiber. The aim optimize various concentrations citric acid (CA) by adding Sodium hypophosphite (NaPO2H2), which activated at different temperatures, obtain highest mechanical This has been confirmed FTIR show esterification process molecular structure cellulose....

Spirulina sp. is a group of microalgae which has number pigments with diverse bioactivities. Chlorophyll one the dominant in that play an important role capturing light as crucial element for photosynthesis. This study aims at investigating characteristic chlorophyll extract from and its physicochemical properties. The effects exposure (white, yellow, UV-C) metal ions (Sn2+, K+, Fe3+) on stability were investigated. green spots RF 0.45 0.37 values observed TLC experiment, indicating b,...

Daun kelor dan daun teh hijau telah terbukti berkhasiat sebagai antibakteri penyebab jerawat terhadap S. aureus P. acne. Kandungan yang pada adalah kuersetin katekin. Tujuan penelitian ini untuk mengetahui aktivitas acne berbagai konsentrasi ekstrak serta kombinasi dengan rasio 1:2, 1:1 2:1. Ekstraksi dilakukan maserasi kinetic menggunakan etanol 70%. Uji metode difusi agar sumuran. Hasil uji menunjukan bahwa KHM berturut-turut 2.5% 1.25% zona hambat 8 mm 7 9 5 mm. Aktivitas terbaik 1:2...

In this study, technical lignin from black liquor was used as a pre-polymer for the preparation of bio-polyurethane (Bio-PU) resins. Briefly, isolated fractionated using ethyl acetate (EtAc) and methanol (MeOH). The liquid fractions lignin, such lignin-EtAc (L-EtAc) lignin-methanol (L-MeOH), were mixed with 10% polymeric isocyanate (based on weight fractions) to obtain Bio-PU lignin-derived resins characterized several techniques. obtained then modify ramie fibers vacuum impregnation method....

Biji kopi robusta adalah bahan dari tanaman yang berfungsi sebagai antioksidan serta mengandung protein dipercaya memiliki khasiat melembabkan dan menghaluskan kulit. Penelitian ini bertujuan untuk menentukan mutu formula gel peel-off ekstrak kering serbuk biji memenuhi syarat. Metode pengujian dilakukan meliputi uji organoleptic, viskositas, pH, waktu mengering, hedonic menggunakan skin analyzer verifikasi iritasi. Hasil menunjukkan bahwa F1 merupakan terbaik dengan karakteristik berwarna...

Multilayer armour system (MAS) becomes the best choice in reinforcing protection for military officers against projectile attack which has a high velocity of up to 7.62×51 mm NATO ball lead core (projectile level III NIJ standard) or AP hard steel IV standard). This study aimed analyze damage formation wolfram carbide (WC) ceramic and ramie fiber composites. The frontmost MAS uses WC is enveloped by back layer composites with epoxy resin material as matrix. Ballistic testing was carried out...

Study of biodelignification rice straw was investigated by using a fungus isolated from indigenous the straw. Identification characterized 18s rRNA sequencing and included in new species Penicillium sp. strain apw-tt2. Ligninase production cell growth observed incubation condition Submerged Fermentation (SmF). Optimizations enzyme were carried out altering pH temperature medium. The results showed that optimum conditions for biopulping are at 40˚C 5. High ligninase Day 4 with activity 571...

Microalgae have some pigments which are potential to be used as functional colorant for foods and cosmetics industries. Here, Spirulina fusiformis is one of the major sources a blue pigment phycocyanin has commercial biotechnological value biomedical research, well natural food cosmetic This study aims at investigating characteristic isolated C-phycocyanin from its stability under different temperature. A grade with purity 2.0 (A620/A280) was obtained successfully cultured in seawater-based...

This paper examines the circulation of cassava germplasm (Manihot esculenta) as a problem in biocultural history. It reviews how plant was introduced into Moluccan islands part 'Columbian exchange' and it has subsequently moved around through distribution stem cuttings. Using combination lexical, ethnographic, botanical genetic data, including material from ecologically-contrasting field sites, evaluates evidence for tracking movement at local regional level, considers extent to which this...

Antidiabetic effects of water extract ciplukan ( Physalis angulata L.) herbs has been done with the test method alloxan diabetes induction. Water was fractionated using n-hexane, ethyl acetate and water.The results showed that dose 10 mg/kgbw fraction of  4.84 have similar effect glibenclamide 0.65 mg/kgbw. The phytochemical screening contains alkaloids, flavonoids, saponins, polyphenols, steroids triterpenoids, monoterpenoids sesquiterpenoids. ABSTRAK Telah dilakukan uji efek antidiabetes...

Today, every airport manager in various countries has tightened runway security to avoid the entry of foreign objects that can endanger passengers and aircraft both when landing taking off. Inspection supervision must be carried out regularly. However, there are still many airports carry inspections by human labor without any technological support. Whereas inspection using takes a relatively long time is prone errors, especially bad weather limited visibility. Technological developments...

The genus Biscogniauxia, a member of the family Xylariaceae, is distributed worldwide with more than 50 recognized taxa. Biscogniauxia species known as plant pathogen, typically acting parasite on tree bark, although certain members this also function endophytic microorganisms. strain has received attention in many cases, which includes constituent research leading to discovery various bioactive secondary metabolites. Currently, there are total 115 chemical compounds belonging class...

Ramie is one of the long natural fiber has strong mechanical properties. To improve quality ramie fiber, this study developed a bio degumming method from superior isolates pectinolytic fungi Rhizopus sp. and optimization raw based on harvesting time. The results selection were used as starter under optimum conditions pH temperature. Also, material harvested at 50-day 60- day to obtain an increase in physical quality. degummed was analysed determine tenacity fineness, functional groups...