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Journal of Biological Researches
ISSN 0852-6834 · The East Java Biological Society · 420 artikel di indeks
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Artikel Jurnal
FRAKSINASI AMILASE DARI Endomycopsis fibuligera ITBRcc64 DENGAN METODE PRESIPITASI AMONIUM SULFAT
Endomycopsis fibuligera ITB.R.cc.64 produced high extracellular amylase activity. It showed two kinds of amylase activities, those are liquefication and saccharification. The aim of this research are to separate each kind of amylase by fractionation with ammonium sulfate and to test the specific…
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Flowering of Areca catechu in Bogor Botanic Gardens
Areca catechu is a species of palms that widely distributed in Indonesia. This palm has unique characteristics and important roles of a tropical forest ecosystem. Indonesian local tribes used seed of this palm for traditionaly medicinal purposes. Information regarding of flowering of A.catechu is…
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Trees structure and composition on logged over forest at Kopiyo Meratus, Hulu Sungai Tengah District, South Kalimantan
Natural forest area in Kalimantan has changed drastically. The aim of this study was to reveal the diversity of tree in Kopiyo Forest of Meratus after termination of Forest Concession was over. Study was carried out at two different observation sites with square method (slope and drier especially)…
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Effect of organic matter and Si liquid fertilizer on growth and yield of sugar cane
Sugarcane is known to absorb more Si than any other nutrient from the soil; therefore continuous cropping of the plant at the same soil would bring consequences of more Si and organic matter depletion. Silicon (Si) is considered as a beneficial nutrient for sugarcane production while organic matter…
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Growth and accumulation of flavan-3-ol in Camellia sinensis through callus culture and suspension culture method
This study was aimed to assess flavan-3-ol biomass in C. sinensis through callus cultures and suspension cultures derived from leaf explants. Callus initiation of both cultures were using Murashige and Skoog medium were enriched with plant growth regulators Naphtha-lene Acetic Acid 3.0 mg/L and…
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Umur glas eel (Anguilla spp.) yang masuk muara Sungai Progo Yogyakarta
The leptocephalus drift with sea currents and moving from spawning area into coastal area near mouth of Progo River. In thecoastal area, leptocephalus metamorfosed into glass eel, after that glass eel migrated to river. The aims of this research were to estimate glass eels age and predict hatching…
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The growth of seedlings of rhizophoraceae in the nursery utilizing fresh water
The recovery of the mangrove areas that have been degraded needs mangrove seedlings in large quantity. A mangrove nursery is generally located on the land close to the planting site and brackish water. The mangrove nursery by means of fresh water is an innovation in the provision of seeds. The…
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Activity test of various mangosteen (Garcinia mangostana) pericarp extract fractions to decrease fasting blood cholesterol levels and lipid peroxidation activity in diabetic mice
The objectives of this study were to determine the effect of various fractions of mangosteen (Garcinia mangostana) pericarp extract to the changes of the fasting blood cholesterol and serum malondialdehyde (MDA) levels on diabetic mice (Mus musculus). Thirty 3-4 months old male mice strain BALB/c…
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Population dynamic of Viscum articulatum Burm. F. on its host in Purwodadi Botanic Garden
V. articulatum Burm. f. is a parasitic plant that has potential as medicinal plant. The research aim is to study the population dynamic and hosts of V. articulatum Burm. f. in Purwodadi Botanic Garden which was conducted in April-September 2013 by cruising method and literature study on previous…
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Characterization of protease-producing bacteria isolated from terasi
Total of 117 bacterial strains were isolated from terasi samples and 69% of isolates (71) could perform distinctive proteolytic activity that related to the ability to produce protease enzymes. Their proteolytic activity was further tested using spot incubation technique. Strain S4-5 has shown the…
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Antibacterial activity of belilik (Brucea javanica (L). merr) and benta (Wikstroemia androsaemofolia decne) to inhibit the growth of enteropathogenic bacteria
Several native Indonesia plants have been used to prepare traditional medicine since long time ago. One of common diseases in tropical country is diarrhea, it caused by the infection of enteropathogenic bacteria such as Enteropathogenic Escherichia coli, Pseudomonas aeruginosa, Staphylococcus…
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Microbial diversity and its importance in microbial genetic resources preservation and its role in natural environments
Biodiversity has been very common to almost every one. However, a comprehensive understanding on the concept of biodiversity might be less common to many discussing parties. Likewise, microbial diversity is even less common to most of academician, ex-cept of course to microbiologists. In fact, a…
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The effect of polysaccharides krestin bioactivity from coriolus versicolor to estradiol levels on Mus musculus estrous cycle
This study aimed to determine the activity of polysaccharide krestin (PSK) from Coriolus versicolor extract to the duration of estrous cycle and estradiol levels. PSK was administrated for 24 days in female Mus musculus, strain Balb/C, 10 weeks old, weight about 25-30 grams. Polysaccharide krestin…
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Effect of diazepam on kidney function and histological structure of white rat’s kidney
The use of NAPZA (Narcotics, Alcohol, Psychotropic, and other addictive substances) in Indonesia keeps increasing. One type of frequently used NAPZAs is diazepam. Diazepam is a kind of sedative-hypnotics drug which belongs to benzodiazepine. The objective of this study was to determine kidney…
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Artikel Jurnal
The expression of TLR-2 and NOD-2 in gingival epithelium of rat after probiotic Lactobacillus reuteri supplementation to inhibit Streptococcus mutans growth
Lactobacillus reuteri is probiotic from Gram positive bacteria which has specific molecular structure, consisted of peptidoglycan (PG) and lipotheihoic acid (LTA). These structure have potential in pattern recognition receptors (PRRs) activation, such as TLR-2 and NOD-2 that are the up stream of…
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Antimicrobial activity of Streptomyces spp. Isolates from vegetable plantation soil
Fifteen Streptomyces isolates were isolated from soil in some different location on vegetable plantation at agriculture standard condition. The isolates were assessed for their antibacterial activity against Mycobacterium tuberculosis (MTB) ATCC H37RV and mycobacterial which isolated from Dr…
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Screening of rapd primer for teak (Tectona grandis)
Identification of DNA polymorphisms in teak is important. It is a first step to determine the presence of genetic varia-tion in teak. The information of genetic variation is needed for teak breeding development. RAPD is one of method which can be used for identification of DNA polymorphism. This…
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Foliar symptoms recovery: developing scoring technique for assessment of soybean resistance to CPMMV (Cowpea Mild Mottle Virus)
Soybean is a commodity that has an important role as the source of protein, but its production is affected by various factors including disease. CpMMV (Cowpea mild mottle virus) is one of the most damaging viruses that cause soybean disease. CpMMVs belong to the group of Carlavirus that are…
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Endophytic fungi colonize agricultural and non-agricultural plants in Bedugul, bali and their antifungal activity against Rhizoctonia solani Kuhn
Isolation of endophytic fungi was done to find alternative microorganisms as antifungal agent against Rhizoctonia solani Kuhn, a soil borne pathogen on many agricultural plants. The research objectives were 1) to isolate and identify endophytic fungi colonize agricultural and non-agricultural…
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Artikel Jurnal
The exploration of fruit flies Bactrocera (Diptera:Tephritidae) and its parasitoid in Madura Island regions
Madura is enriched by great diversity despite of its infertile natural condition. This condition influences fruit flies existence and diversity. Purpose of this study was to investigate the diversity and distribution of fruit flies with their host in Madura region. Sampling methods in this study…