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Search Results: 1 - 10 of 234 matches for " GC Obute "
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Cytogenetic studies on some Nigerian species of Solanum L. (Solanaceae)
GC Obute, BC Ndukwu, BE Okoli
African Journal of Biotechnology , 2006,
Abstract: Cytogenetic studies to determine the chromosome number, structure and behaviour of some species of Solanum in Nigeria was carried out. Attempt was also made to induce polyploidy in the species. Comparative analysis of the cytological behaviour of the diploid and polyploid cytotypes was made. The studies show that the somatic chromosome number in the genus Solanum is 2n = 24. Colchiploidisation produced tetraploids with 2n = 48 and aneuploids with 2n = 69. The karyotype analysis indicates that the chromosomes were generally very small. There were also slight variations in centromeric positions and arm lengths. Meiotic behaviour of the chromosomes involved a combination of bivalent and multivalent associations especially at the polyploid levels. The significance of this work in the understanding of cytogenetic behaviour of plants and crop improvement efforts are discussed
Cytogenetic studies on some Nigerian species of Solanum L. (Solanaceae)
GC Obute, BC Ndukwu, BE Okoli
African Journal of Biotechnology , 2006,
Abstract: Cytogenetic studies to determine the chromosome number, structure and behaviour of some species of Solanum in Nigeria were carried out. Attempt was also made to induce polyploidy in the species. Comparative analysis of the cytological behaviour of the diploid and polyploid cytotypes was made. The studies show that the somatic chromosome number in the genus Solanum is 2n = 24. Colchiploidisation produced tetraploids with 2n = 48 and aneuploids with 2n = 69. The karyotype analysis indicates that the chromosomes were generally very small. There were also slight variations in centromeric positions and arm lengths. Meiotic behaviour of the chromosomes involved a combination of bivalent and multivalent associations especially at the polyploid levels. The significance of this work in the understanding of cytogenetic behaviour of plants and crop improvement efforts are discussed
Targeted mutagenesis in Vigna unguiculata (L.) Walp. and Cucumeropsis mannii (NAUD) in Nigeria
GC Obute, BC Ndukwu, OF Chukwu
African Journal of Biotechnology , 2007,
Abstract: The mutagenic effects of 0.2% aqueous solution of colchicine on gross and micromophological features of seedlings of Vigna unguiculata (L) Walp. and Cucumeropsis mannii (Naud.) were investigated. Terminal buds of two-week old seedlings were assaulted with 0.2% colchicine by the cotton plug and micro syringe methods and performances were monitored until maturity. Colchicine-treated V. unguicu-lata seedlings were observed to grow slower, had malformed leaves, flowered late and produced less number of seeds per pod than the control. Mean values of features like stomatal indices on both the abaxial and adaxial surfaces, terminal leaflet dimensions and trichome distribution between the treated and control were found to be significantly different. In contrast, treated seedlings of C. mannii flowered and fruited earlier than the case of control material. However, growth was also slowed down by the treatment while features like stomatal indices and trichome distribution were not significantly different. The results here have shown that apart from doubling of chromosomes, colchicine can also be used to induce other mutagenic changes which may be of agronomic utility.
Tracking sexual dimorphism in Telfairia occidentalis Hooker f. (Cucurbitaceae) with morphological and molecular markers
BC Ndukwu, GC Obute, IL Wary-Toby
African Journal of Biotechnology , 2005,
Abstract: Morphological (foliar features) and molecular (DNA fingerprinting) markers were used to characterize sexual dimorphism in Telfairia occidentalis Hook. f. (Cucurbitaceae). A total of thirty strains comprising fifteen males and fifteen females from market-sourced fruits bred to the third generation were used for the investigation. The amplified fragment length polymorphism (AFLP) technique was combined with silver staining to determine the level of DNA polymorphism in the strains. Results showed that the females were generally larger in size than the males in leaf morphological features, while DNA fingerprints revealed the existence of polymorphism in the plant. However, this genetic variability did not clearly correspond with presence of sexual dimorphism in the species. The implications of these results in understanding the genetics, breeding and conservation of the plant’s germplasm are discussed.
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生物工程学报 , 2012,
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生物工程学报 , 2012,
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生物工程学报 , 2012,
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28(9)目录
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生物工程学报 , 2012,
Abstract:
Study on Empathy among Undergraduate Students of the Medical Profession in Nepal  [PDF]
Krishna Bahadur GC, Sudarshan Paudel
Journal of Biosciences and Medicines (JBM) , 2017, DOI: 10.4236/jbm.2017.511007
Abstract: Background: The incumbent of medical professional is expected to be socially responsible and emotionally empathetic along with good communication propensity to fasten the doctor-patient relationship. Whilst doctor’s proficiency to recognize a patient’s perspectives, and convey such an understanding back to the patient; in our case, the empathy and compassion level of promising medical professional is unknown in Nepal. Thus, this study aimed to analyze the compassion and empathy score of final year’s undergraduate students of four medical colleges in Nepal. Methods: Self-reported empathy measures were obtained using the Jefferson Scale of Physician-Student version. Results: The degree of empathy for the participants was 97.28 (SD = 14.44) with a median score of 96.00 and a range of 44 (min) to 133 (max). There was a significant difference on scores of the Jefferson scale of physician empathy between NMC Nepalgunj and BPKIHS (p = 0.00) and between NMC Nepalgunj and Manipal Pokhara (p = 0.00), as well as between UCMS and Manipal Pokhara (p = 0.044). These results were significant at the 95% confidence interval. Conclusions: The mean empathy score for the Nepali students is lower than medical students from developed countries but almost similar to medical students from other Asian medical students. The female Nepali medical students scored slightly higher than their male counterparts. Thus colleges have to develop academic programs to improve empathy and compassion among medical students through providing adequate time to consult with patient and faculties.
Microbiological quality of poultry meat: a review
Mead, GC;
Revista Brasileira de Ciência Avícola , 2004, DOI: 10.1590/S1516-635X2004000300001
Abstract: poultry meat can be contaminated with a variety of microorganisms, including those capable of spoiling the product during chill storage, and certain foodborne pathogens. human illness may follow from handling of raw meat, undercooking or mishandling of the cooked product. while salmonella and campylobacter spp. remain the organisms of greatest global concern in this respect, others present include the more recently reported arcobacter and helicobacter spp. and, occasionally, verotoxigenic escherichia coli. also considered here is the growing problem of antimicrobial resistance among poultry-associated pathogens. because of the need for a systematic and universally applicable approach to food safety control, the hazard analysis critical control point (haccp) concept is increasingly being introduced into the poultry industry, and quantitative risk assessment (qra) is being applied to microbial hazards. among a number of completed and on-going studies on qra are those undertaken by fao/who on salmonella and campylobacter in broilers. in the case of campylobacter, however, any qra must assume at present that all strains have the same pathogenic potential for humans and comparable survival capabilities, even though this is unlikely to be the case. implementation of the haccp system in poultry processing plants addresses zoonotic agents that are not detectable by conventional meat inspection procedures and can help to control contamination of carcasses with spoilage organisms. the system brings obvious benefits in optimising plant hygiene, ensuring compliance with legislation and providing evidence of 'due diligence' on the part of the processor. it is now being applied globally in two different situations: in one, such as that occurring in the usa, carcass contamination is clearly reduced as carcasses pass through the process and are finally chilled in super-chlorinated water. there is also the option to use a chemical-rinse treatment for further reduction of microbial c
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