Abbreviation: Afr. J. Biotechnol.
Start Year: 2002
Page 461 of 556, showing 20 records out of 11105 total, starting on record 9201, ending on 9220
DOI: 10.5897/AJB08.379[Article Number: DEAB6C340068]
A mutant Aspergillus sp. CJ 22-326-14 with higher production of chitosanase was selected by serial mutation procedure, and the optimization of medium components was performed using one-factor-at-a-time combined with orthogonal array design method. The results showed that chitosan, wheat bran and (NH4)2SO4 were the most important components by one-factor-at-a-time experiments. And the optimal... Read more.
DOI: 10.5897/AJB07.907[Article Number: 782FDAB40073]
Ziziphus mauritiana Lamk. (Ber) fruit is harvested at different stages of ripening in the Zambezi valley of Zimbabwe. We hypothesize that the organoleptic quality attributes of fruits depend on post-harvest drying method and ripening stage at harvest. This study was carried out to evaluate the effect of different stages of ripening on the quality of Z. mauritiana fruits during drying. The... Read more.
DOI: 10.5897/AJB07.707[Article Number: 33F3E1540074]
Laboratory static bioassays were conducted to determine the 96-h LC50 and the lethal levels of concentrations of the aquaculture therapeutant, potassium permanganate (KMnO4) on fingerlings (mean weight, 6.24 ± 0.15 g and mean length, 4.25 ± 0.07 cm) of the African catfish, Clarias gariepinus. A total number of one hundred and eighty (180) fingerlings of mixed sex and brood stock were used for the... Read more.
DOI: 10.5897/AJB08.290[Article Number: 40F1C1340076]
Two hundred and forty four (244) West African Dwarf (WAD) Goats comprising one hundred and sixty (160) females and eighty-four (84) males in five (5) age groups in years (0 - 1, 1 - 2, 2 - 3, 3 - 4 and 4 - 5) for female and two (2) age groups also in years (0 - 1 and 1 - 2) for males were investigated. The aim was to document the body characteristics of the WAD goats in the deciduous forest... Read more.
DOI: 10.5897/AJB08.211[Article Number: C45E54A40078]
Butyrophilin plays an important role in secretion of milk lipid. The present study describes polymorphism of butyrophilin gene. This is the first study of butyrophilin gene polymorphism in Najdi cattle of Iran. We used the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique to screen for DNA polymorphism in 109 cattle. In all cattle, we amplified an 863 fragment consisting... Read more.
DOI: 10.5897/AJB2008.000-5040[Article Number: 40D0A907391]
The study determined participating farmers’ perception of the performance of the National Special Programme for Food Security (NSPFS) in Enugu State, Nigeria. A structured interview schedule was used to collect data from a sample of 147 farmers in the three SPFS sites in the state. Statistical analysis was accomplished by the use of frequency distributions, percentages and mean scores. Findings... Read more.
DOI: 10.5897/AJB08.120[Article Number: 3BE52E76106]
Cowpea viruses are difficult to identify using morphological criteria which can be time consuming, challenging, and require extensive knowledge in taxonomy. In order to improve the quality and quantity of the germplasms and to significantly reduce the infection and transmission of virus to different cultivars of cowpea, proper diagnosis and control is essential. The immuno-diagnostic and molecular-diagnostic methods... Read more.
DOI: 10.5897/AJB08.620[Article Number: 9574B156111]
The histologic types of gastric malignancies and other associated histopathological indices in gastric biopsies received at the Department of Morbid Anatomy and Forensic Medicine, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Osun State, Nigeria were determined. The study was retrospective and it involved collecting all slides on all available cases of gastric biopsies over a period of ten years... Read more.
DOI: 10.5897/AJB08.223[Article Number: E936C1C6124]
Changes in left ventricular structures and function have been reported in cardiomyopathies. No prediction models have been established in this environment. This study established regression models for prediction of left ventricular structures in normal subjects. A sample of normal subjects was drawn from a large urban population. Echocardiographic end diastolic diameters, end systolic diameters, posterior wall... Read more.
DOI: 10.5897/AJB08.226[Article Number: B7BE22F6135]
The antifugal activities of aqueous extract of Calotropics procera was determined against Epidermophyton flocosum and Tricophyton gypseum using agar diffusion techniques. The crude extract of C. procera showed activity on E. flocosum and T. gypseum at 4.0 mg/ml. The result of minimum inhibitory concentration (MIC) was 0.5 and 0.9 mg/ml and that of minimum... Read more.
DOI: 10.5897/AJB08.021[Article Number: F607C696151]
Eucalyptus grandis is an economically important tree species that is native to the Australian continent and its northern neighbours, where it is grown primarily for its hard wood timber and pulp for paper industries. It is widely grown in tropical countries such as South Africa, Kenya, Angola, Ghana, and Zimbabwe. Five ISSR primers generated 41 scorable polymorphic bands which were used to analyse genetic diversity... Read more.
DOI: 10.5897/AJB08.152[Article Number: 5742B8B6164]
Reporter gene technology has been increasingly important in the post-genomic era to explain human complexity and diversity. The pGL3-Basic vector has been prevalently used as a tool for analyzing cis-acting elements critical for transcriptional mechanisms. In this work, we constructed and evaluated the pGL3-Basic plasmid containing the cytomegalovirus (CMV) enhancer/promoter aiming to establish a positive control... Read more.
DOI: 10.5897/AJB08.386[Article Number: 21653296178]
Wild populations of Chinese alligator (Alligator sinensis) are on the edge of extinction. Through a release project lunched by the State Forestry Administration (SFA) of China, some captive-bred alligators will be selected and released into the wild to supplement and renew natural populations. Before releasing, health screening protocols on individuals are very necessary. In this paper, bacterium ASC10 was isolated from... Read more.
DOI: 10.5897/AJB08.197[Article Number: E775F4B6198]
Insecticides are chemical agents used to control insects, but humans are usually exposed to insecticides and this may have a long term toxicological effects on their health. Different brands of insecticides including BaygonR, MobileR, MorteinR and TotalR were subjected to Ames spot Forward Mutation Assay, using Escherichia coli. The assay was examined for the presence of revertant strains of the organism... Read more.
DOI: 10.5897/AJB08.091[Article Number: ECE75C66216]
Dissemination of research results by the International Institute of Tropical Agriculture (IITA) had been a major challenge to the Institute as inappropriate dissemination mechanism was revealed as a major constraint to her earlier efforts in disseminating cooking banana technologies between 1990 and 1994. A public-private technology delivery approach (research-farmer-to-farmer extension approach), which allows farmers... Read more.
DOI: 10.5897/AJB08.167[Article Number: F697BE06237]
Flavonoids are major active constituents in mulberry (Morus alba L.) leaves and possess various pharmacological activities. In the present study, the extraction technology and preparative separation of total flavonoids (TFs) in mulberry leaves extracts by macroporous resins were studied systematically, and the column packed with selected resin was used to perform dynamic adsorption and desorption tests to optimize... Read more.
DOI: 10.5897/AJB08.170[Article Number: 0C58FFE6253]
Effects of seed priming treatments with 0.5% KH2PO4 (w/v) solution and water were determined on germination and seedling characters of hexaploid triticale (Triticosecale Witm., cv. Presto) in different osmotic potential of NaCl and PEG solutions. Drought and salt osmotic stress conditions were separately created by using PEG 6000 and NaCl, respectively, at different osmotic potentials (-0.45, -0.77, -1.03 and -1.44... Read more.
DOI: 10.5897/AJB08.301[Article Number: 5DFE8D66273]
This research was conducted to investigate effects of morphogenetic and diurnal variability on the hypericin content of St. John’s Wort (Hypericum perforatum L.) populations originating from Turkey for maximum utilization of the active substance in plants. During 2002 and 2003, field trials were conducted at Uludag University, Faculty of Agriculture, Department of Field Crops, Bursa, Turkey. Samples of bud,... Read more.
DOI: 10.5897/AJB08.344[Article Number: 361A2AB6298]
The kernel of Carya cathayensis Sarg. is a special local product and is widely used as a kind of food in China. In the present study, the antioxidant properties of the kernel including the ability to inhibit the autooxidation of linoleic acid, the reducing capacity, and the scavenging activity on the free radicals were evaluated. The results indicated that a kernel of C. cathayensis has effective... Read more.
DOI: 10.5897/AJB08.869[Article Number: C33DBFB6329]
Studies were carried out for rapid micropropagation of three sugarcane varieties i.e., HSF-240, CP-77-400 and CPF-237. Shoot tip was used as explant source. Shoot initiation from explant of all three varieties was achieved at 1 mg/l Kin and 0.1 mg/l GA3. For rapid multiplication the regenerated shoots were transferred on liquid Murashige and Skoog medium containing 2% sucrose, supplemented with BAP in combinations with... Read more.
Page 461 of 556, showing 20 records out of 11105 total, starting on record 9201, ending on 9220