African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12218

Table of Content: 3 May 2010; 9(18)

May 2010

Possibilities of more efficient usage of genetic potential of broilers breeders

  During the last ten years, poultry production in the world and particularly, EU has been specific due to new trends, whereby special attention is focused on regulations and procedures that are adopted by European Union (EU), Food and Agriculture Organization of the United Nations (FAO), International Organization for Standardization (ISO) and the World Trade Organization. Legal regulations in EU (standards,...

Author(s): Sreten Mitrovic, Vladan Dermanovic, Mihailo Radivojevic, Nebojsa Ralevic and DorDe Ostojic

May 2010

Acute coronary syndrome: Role of the telomere dynamic

  Telomeres, or historically named "terminal genes" are first discovered by Muller working on fruit fly in 1930s. Since then, the great progress was made in understanding the consequences of telomere erosion on the human health and disease states, as age related vascular diseases. The overlapping links between telomere dynamics in endothelial cells, endothelial progenitor cells and other cells laid in...

Author(s): Mohaddeseh Behjati

May 2010

Prokaryotic expression of nitric oxide associated factor gene-NOA1 from potato (Solanum tuberosum L.)

  In this study, the cDNA of a NOA (nitric oxide associated factor) was isolated from potato (Solanum tuberosum L.) for the first time (named StNOA1). The StNOA1 bears a centrally positioned GTPase-binding domain. Sequence alignment and phylogenetic analysis of the deduced StNOA1 protein with other known NOA family protein indicates that StNOA1 is highly homologenous with NbNOA1...

Author(s): Bo Zhang, Haiqing Wang, Yuhu Shen and Huaigang Zhang

May 2010

Phylogenetic relationship analysis of Genista L. (Fabaceae) species from Turkey as revealed by inter-simple sequence repeat amplification

  Genista L. (Fabaceae) is distributed in Europe, South Africa, and West Asia and consists of almost 90 species in the world. Thirteen species of the genus are distributed in Turkey. Taxonomic problems of the species started to be resolved with recently developed DNA-based molecular methods. These methods, in contrast to phenotypical analyses, are free from the effects of environmental conditions. In this...

Author(s): Erdogan E. Hakki, Bekir Dogan, Ahmet Duran, Esra Martin and Muhittin Dinc

May 2010

Occurrence of Pospiviroid in potato, tomato and some ornamental plants in Turkey

  In order to investigate the Pospiviroid in potato, tomato and some ornamental plants in Turkey, a survey study was carried out from 2006 to 2009. During this survey study, a total of 1766 samples (1047 potato samples, 258 tomato leaves and 461 ornamental plants) were tested by reverse transcription-polymerase chain reaction (RT-PCR) and, the samples found to be positive in RT-PCR were also...

Author(s): Hidayet Bostan, Mona Gazel, Ibrahim Ozer Elibuyuk, Omer Atabeyoğluand Kadriye Cağlayan

May 2010

Tolerance to freezing stress in Cicer accessions under controlled and field conditions

  Freezing tolerance was determined in 5 annual wild Cicer and 225 Cicer arietinumL. accessions, grown both in field and controlled conditions. In controlled conditions, the temperature was decreased 5°C daily to achieve -20°C. Field trial was conducted at Urmia, Iran. In general, 'kabuli' chickpeas were more susceptible to freezing stress than 'desi'...

Author(s): A. Saeed, R. Darvishzadeh, H. Hovsepyan and A. Asatryan

May 2010

Correlation and path coefficient analysis of yield and agronomic characters among open pollinated maize varieties and their F1 hybrids in a diallel cross

  A two-year study was conducted at the University of Ilorin Teaching and Research Farm Ilorin (Latitude 80 29’N, Longitude 40 35’E and annual rainfall of 945 mm), Nigeria, during the 2005 and 2006 cropping seasons. The experiment was conducted to determine the association between maize grain yield and other agronomic parameters (days to plant emergence, days to 50% tasselling, pollen shed and...

Author(s): Bello, O. B., Olaoye, G., Abdulmaliq, S. Y., Afolabi, M. S. and Ige, S. A.

May 2010

Plant regeneration of Michelia champaca L., through somatic embryogenesis

  Michelia champaca L. is a woody ornamental tree species which has high commercial value to be used as a basic material for perfume, cosmetic, and medicine. The development of an efficient plant regeneration system for M. champaca is essential for the production of Champaca planting material and precondition for genetic manipulation. Plant regeneration systems of M. champacathrough somatic...

Author(s): Armiyanti, Mihdzar Abdul Kadir, Saleh Kadzimin and Syaiful Bahri Panjaitan

May 2010

Influences of nitrogen and potassium top dressing on yield and yield components as well as their accumulation in rice (Oryza sativa)

  This research was conducted to investigate the effects of different rates of nitrogen (N) and potassium (K) top dressing on grain yield and yield components of rice (Oryza sativa cv. Tarrom) and to investigate N and K content of upper leaves analyzed at ten different times. A pot experiment was carried out on a completely randomized design with seven replications under greenhouse conditions at the...

Author(s): M. A. Bahmanyar and S. Soodaee Mashaee

May 2010

Biodegradation of phenanthrene in artificial seawater by using free and immobilized strain of Sphingomonas sp. GY2B

  Biodegradation has been suggested as an alternative way to remove polycyclic aromatic hydrocarbons (PAHs) from contaminated environment. Phenanthrene is a representative carcinogenic PAHs containing “bay-region” and “K-region”. StrainSphingomonas sp. GY2B is a high efficient phenanthrene-degrading strain isolated from crude oil contaminated soils and had a broad-spectrum...

Author(s): Xue-Qin Tao, Jie-Ping Liu, Gui-Ning Lu, Xiu Guo, Hui-Ping Jiang and Guan-Qiu Sun

May 2010

Isolation and identification of a cold-adapted lipase producing strain from decayed seeds of Ginkgo biloba L. and characterization of the lipase

  A cold-adapted lipase producing strain of mesophilic bacterium, named SYBC LIP-Y, was isolated from the decayed seeds of Ginkgo biloba L. by screening with plates containing Victoria Blue B and with the flask-shaking fermentation. It was identified as a novel Burkholderia species. The properties of its lipase after purification by PEG1000/ potassium phosphate aqueous two-phase system...

Author(s): Bo-hua Yuan, Yu-jie Cai, Xiang-ru Liao, Li-hog Yun, Feng Zhang and Da-bing Zhang 

May 2010

The use of an economical medium for the production of alkaline serine proteases by Bacillus licheniformis NH1

  The present study is concerned with the selection of new economical media based on agricultural and marine-processing by-products for the production of alkaline proteases by Bacillus licheniformis NH1. Powders from different fish species were prepared and then tested as growth media at a concentration of 10 g/l for proteases production by NH1 strain. Powder prepared from whole Sardinelle was...

Author(s): Nedra El Hadj-Ali, Noomen Hmidet, Nabil Souissi, Alya Sellami-Kamoun and Moncef Nasri

May 2010

Preliminary investigation of chemical fractionation and heavy metal accumulation in plant maize (Zea mays) grown on chromated copper arsenate (CCA) contaminated soil amended with poultry droppings

  Poultry droppings used as soil amendments and a sequential chemical speciation (six steps) procedure were used to predict the uptake of Cr, Cu and As by maize (Zea mays) plant in chromated copper arsenate (CCA) contaminated soil. A pot experiment containing contaminated soil samples to different percentage levels of amendments and control (no amendment) was set up. The initial concentration of Cr, Cu and As...

Author(s): E. U. Ikhuoria, S. O. P. Urunmatsoma and F. E. Okieimen

May 2010

Anti-oxidative activities of sorghum, foxtail millet and proso millet extracts

  In this study, sorghum, foxtail millet and proso millet extracts were evaluated by various in vitro anti-oxidant assays, including 1,1-diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenging activity, reducing power by Fe3+- Fe2+ transformation, and anti-lipid peroxidative activity by ferric thiocyanate. The sorghum extract contained high amount of phenolic compounds as well as a high level...

Author(s): Ju-Sung Kim, Tae Kyung Hyun and Myong-Jo Kim,

May 2010

A study on the extraction and purification technology of tea sapogenin

  In order to extract and purify tea sapogenin, first the extraction liquid is obtained using mechanically pressed tea-seeds as raw material, which will be decreased by organic solvent. When the conditions like the methanol volume fraction is 75v/v, solid-liquid is 1:4 and the ultrasonic frequency is 25.8 Hz, extract them for 30 min. After this, collect the extraction liquid and slowly add in Hz-841 macroporous...

Author(s): Li Xiang, Ma Jian-zhong, Xia jing and Shi Yun-dong

May 2010

Cloning and over-expression of Penicillin G acylase in Escherichia coli BL21

  Penicillin G acylase (PGA) is one of the most important enzymes in the pharmaceutical industry. It is utilized in the process for production of semi-synthetic penicillins. Several different penicillin acylases with various characteristic have been isolated from different bacteria and identification of bacterial isolates harboring PGA enzyme with higher industrial compatibilities is of high interest. The aim...

Author(s): Magsoud Kafshnochi, Safar Farajnia, Raheb Aboshof, Hossein Babaeiand Mona Aminolroayaee

May 2010

Comparison of pyrethrins extraction methods efficiencies

  Extraction efficiency of insecticidal active compounds from dried Dalmatian pyrethrum flowers (Chrysanthemum cinerariaefolium /Trevir/Vis) was tested using different techniques and solvents. The research included six treatments which are the combination of two techniques (soxtec and ultrasound) and three different solvents (hexane, ethanol and petroleum ether). Dalmatian pyrethrum is a perennial herb...

Author(s): Dean Ban, Barbara Sladonja, Marina Lukić, Igor Lukić, Viviane Lušetić, Karin Kovačević Ganić and Dragan Žnidarčič

May 2010

Phenols, essential oils and carotenoids of Rosa canina from Tunisia and their antioxidant activities

  The antioxidant activity of leaf extracts of Rosa canina from diverse localities of Tunisia were evaluated by ABTS and DPPH methods, whereas in those of essential oils and carotenoids extracts such activity was determined only by the ABTS method. Total phenols determined by the Folin method revealed that at Aindraham, samples showed a great variability of phenol content in contrast to those from...

Author(s): H. Ghazghazi, M. G. Miguel, B. Hasnaoui, H. Sebei, M. Ksontini, A. C. Figueiredo, L. G. Pedro and J. G. Barroso

May 2010

Antisecretory and analgesic activities of Terminalia bellerica

  This study describes the antisecretory and analgesic activities of the crude extract of Terminalia bellerica (Tb.Cr). T. bellerica extract inhibited the castor oil-induced intestinal fluid secretion in mice at the dose range of 300 - 1000 mg/kg. The extract also dose-dependently (50 - 100 mg/kg) reduced the numbers of acetic acid-mediated writhes in mice. These results indicate...

Author(s): Arif-ullah Khan, and Anwarul Hassan Gilani

May 2010

Potential values of some non-leguminous browse plants as dry season feed for ruminants in Nigeria

  A study was conducted to assess the nutritive potential of some tropical non-leguminous multipurpose trees: Bombax glabra, Adansonia digitata, Ceiba pentandra, Kigelia africana, Newbouldia leavis, Treculia africana, Milicia exselsa, Mangifera indica, Spondia mombin, Terminalia superba, Terminalia catappa, Tabebuia rosea and Ficus thonningii. A wide variation was observed in the chemical...

Author(s): D. O. Ogunbosoye and O. J. Babayemi