Abbreviation: Afr. J. Biotechnol.
Start Year: 2002
Page 461 of 580, showing 20 records out of 11589 total, starting on record 9201, ending on 9220
DOI: 10.5897/AJB2009.000-9024[Article Number: F3E145A5674]
The Earth's average temperature has risen to about 1oF in the past 100 years and is projected to rise another 3 to 10oF in the next 100 years. Human activity in last few decades has increased the concentration of various greenhouse gases, leading to increased CO2, methane, tropospheric ozone, CFCs and nitrous oxide. To normalize the nature health many researchers around globe devote their life to searching... Read more.
DOI: 10.5897/AJB2009.000-9025[Article Number: 6BED8595684]
To investigate the relationship between placental thickness and foetal growth parameters in normal singleton Nigerian foetuses. Six hundred and sixty-six pregnant Nigerian women were studied by ultrasound in a cross sectional prospective study at the Federal Medical Centre, Makurdi, Nigeria. The pregnancies were in the second and third trimesters, and were not complicated by either maternal or foetal disease. BPD and AC... Read more.
DOI: 10.5897/AJB2009.000-9026[Article Number: B9F909D5696]
The effects of artesunate were investigated on red blood cell count and glucose-6-phosphate dehydrogenase activity in male rats. Twelve (12) male rats were divided into two groups of six (6) rats each. Group 1 rats were control rats which received normal saline while group 2 rats were treated with artesunate orally for five (5) days. 2.90 mg/kg of artesunate was given on the first day of treatment and 1.45 mg/kg was... Read more.
DOI: 10.5897/AJB2009.000-9027[Article Number: B0F19E25707]
Random amplified polymorphic DNA (RAPD) markers were used to determine genetic relationships among five native populations of Liquidambar orientalis Mill. Eighty-four oligonucleotide primers were used in PCR and 782 RAPD markers were evaluated for statistical analysis. Generated Nei-Li’s coefficient indicated that the highest similarity was 83.1% between samples from Koycegiz and Cine populations, while... Read more.
DOI: 10.5897/AJB2009.000-9028[Article Number: 8E9C4445714]
A total of 210 different bacteria were isolated from water samples collected in different surveillance sites in Bangladesh between May and July 2004. Of these, 147 isolates were analyzed and 103 were identified by different biochemical tests as well as stereotyped with specific antiserum. Sixty five percent of these isolates were identified as Escherichia coli which were resistant to multiple drugs including... Read more.
DOI: 10.5897/AJB2009.000-9029[Article Number: DD91A0C5731]
Conjugation process was conducted to determine the means of transferring multiple loci of antibiotic resistant gene among bacteria in the surface water of Bangladesh. Our observation demonstrated that tetracycline resistant gene can be spread between bacteria in the aquatic environment. In this study, it was surprisingly observed that tetracycline resistant gene was transferable horizontally by conjugation process... Read more.
DOI: 10.5897/AJB2009.000-9030[Article Number: 2F87A137584]
Low amylose rice (<10%) that lies between glutinous and viscidity rice is called “soft rice”. There is an extremely significant negative correlation between amylose contents and protein contents in common rice grains. In an attempt to analyze whether the anti-Waxy gene could increase protein content while reducing amylose content in the rice grains, and develop good... Read more.
DOI: 10.5897/AJB2009.000-9031[Article Number: E18F7BA7586]
In order to map the QTLs for the agronomic traits in Lablab purpureus (L.) Sweet, we designed an F2 population derived from lablab accession (‘Meidou2012’ and ‘Nanhui23’) for construction of genetic linkage map and repeatedly measured three fruit traits (pod length, pod diameter and pod fresh thickness) and three growth phenological traits (flowering time, podding time and harvest... Read more.
DOI: 10.5897/AJB2009.000-9032[Article Number: 1383EF67588]
This study was conducted to determine the effects of spent mushroom compost (SMC), which is a waste product of mushroom processing through a year, on greenhouse cucumber growth as an organic matter source for the soil. The effects of SMC on several yield related characteristics, such as total yield, fruit width, fruit length, total soluble solids, first quality fruit yield in total yield and nutrition content of the... Read more.
DOI: 10.5897/AJB2009.000-9033[Article Number: 1A94A287589]
Seed storage operations in the tropics would benefit from low input techniques that can maintain seed physiological quality for considerably long periods without investments in cooling. A study was conducted to evaluate seed vigour and estimate seed longevity in maize during dry storage with commercial desiccant (silica gel) at various levels of gel/seed ratios in air-tight containers under ambient tropical temperature.... Read more.
DOI: 10.5897/AJB2009.000-9034[Article Number: 5E24B527590]
Azolla filiculoides a planktonic fern found floating on the surface of wetlands, ponds and rivers. Because of its ability to fix nitrogen through symbiotic cyanobacteria, it causes more rice production in paddy fields and is used as a green fertilizer. A. filiculoides was introduced from Philippine as a green fertilizer for rice crop to Iran, at 1986. The climatic condition of paddy fields, ponds and... Read more.
DOI: 10.5897/AJB2009.000-9035[Article Number: 6221DAC7591]
Endophytic bacteria are one of the most potential biological control agents in plant disease protection. The aim of this work was to evaluate the antimicrobial activities of a strain of endophytic bacterium which was isolated from Epimedium brevicornuMaxim. The dual tests revealed that this endophytic bacterium strain displayed a wide-spectrum antimicrobial activity against 14 fugal phytopathogens and one bacterial... Read more.
DOI: 10.5897/AJB2009.000-9036[Article Number: F2799DE7592]
The aim of the current study was to determine the effects of sowing depths (3, 5, 7, 9 cm) on grain yield and yield components for wheat cultivars during 2004-2006 at one site in Van Province in Eastern Turkey. Grain yield and yield components were found to positively correlate with coleoptile length, with marked declines observed in grain yield and yield components among varieties with shorter coleoptiles in... Read more.
DOI: 10.5897/AJB2009.000-9037[Article Number: C8564E97593]
The objective of this study was to investigate the altitudinal variation within and between Scots pine (Pinus sylvestris L.) populations in Turkey using 23 morphological characters. Seeds were collected from 149 open-pollinated parents (trees) from five populations sampled from different altitudes in the natural distribution range of the species in northern Turkey and raised in a nursery along the coast. The... Read more.
DOI: 10.5897/AJB2009.000-9038[Article Number: 1F0994E7594]
Antagonistic activity of 24 selected bacterial strains detected by previous microbiological studies to Aspergillus flavus was tested in vitro and in vivoconditions. Within 24 strains, only ten strains showed remarkable inhibition zone (6-34 mm) against the pathogen in assays carried out in Petri plates. Both cell suspension and culture filtrates of prominent 10 bacterial strains were also tested... Read more.
DOI: 10.5897/AJB2009.000-9039[Article Number: B39C8DF7596]
This work evaluated the yield of Pleurotus pulmonarius on different mixtures of cotton waste and cassava peel. P. pulmonarius demonstrated significantly higher colonization rate on cotton waste substrate (100 g cotton waste) 3 weeks after inoculation of spawn than any other substrate mixtures. Cotton waste had the shortest time for full mycelial ramification (3 weeks) and mushroom primodial... Read more.
DOI: 10.5897/AJB2009.000-9040[Article Number: 739F07F7597]
Seven plant growth-promoting rhizobacterial (PGPR) strains were isolated from the rhizoplane and rhizosphere of wheat from four different sites of Pakistan. These strains were analyzed for production of indole acetic acid (IAA), phosphorous solublization capability and inhibition of Rhizoctonia solani on rye agar medium. Strains WPR-51, WPR-42 and WM-30 were selected to test in... Read more.
DOI: 10.5897/AJB2009.000-9041[Article Number: 4F5DCE57599]
Insect mediated out-crossing poses a lot of problems in plant breeding and seed production by creating unwanted genotypes or off-types in the field including mixtures in seed lots. Removal of off-types in the field or seed lots increases costs of production. Information on level of out-crossing in cowpea and its insect pollinators as well as associated pollen movement would be useful in developing strategies to reduce... Read more.
DOI: 10.5897/AJB2009.000-9042[Article Number: 34132F17600]
The present investigations were carried out in Salt Range area of Pakistan, regarding the morphology of grasses as an aid to their correct identification, their distribution and indigenous uses in the area. The study area is globally known by its large salt reserves and it has rich floral diversity. From the study area 62 species of grasses belonging to 11 tribes were collected. The largest tribe was Paniceae followed... Read more.
DOI: 10.5897/AJB2009.000-9043[Article Number: 0F83B447602]
Effects of pH, temperature, and level of mixing on the production of fusion M13 phage bearing the peptide sequence (C-WSFFSNI-C) that interacts with HBcAg were investigated in this study. The optimum pH for the phage production was achieved at pH 7, followed by pH 6 and 8. The highest fusion phage titre was obtained at growth temperature of 37°C, followed by 27 and 42°C. The rotational speed at 250 rpm was the... Read more.
Page 461 of 580, showing 20 records out of 11589 total, starting on record 9201, ending on 9220