African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12487

Table of Content: 13 November 2012; 11(91)

November 2012

Biocorrosion control: Current strategies and promising alternatives

  Metal corrosion is an electrochemical reaction between the environment and a metal, in which microbes are thought to play a very important role. The rates at which various types of metals corrode are dependent upon environmental conditions as well as on the type of metals. The most well studied bacteria involved in biocorrosion are the anaerobic sulphate reducing bacteria (SRB) and other bacteria such as...

Author(s): Lin, J. and Ballim, R

November 2012

Levels and patterns of genetic diversity in wild Chrysichthys nigrodigitatus in the Lagos Lagoon complex

  Mitochondrial DNA control region sequences were used to investigate the genetic diversity of populations of Chrysichthys nigrodigitatus and Chrysichthys walkeri in the Lagos Lagoon complex. A total of 34 haplotypes were detected. The genetic diversity among C. nigrodigitatus as determined by haplotype and nucleotide diversities were 0.879 ± 0.033 and 0.0131 ± 0.003,...

Author(s): Sylvanus A. Nwafili, Olufemi O. Soyinka and Tian Xiang Gao

November 2012

Phytohormones content and random amplified polymorphic DNA (RAPD) marker assessment of some Egyptian citrus cultivars

  In Egypt, Citrus represents one of the main fruit tree crops for both local and export potentials. In this study, leaf and vegetative bud samples were studied for cultivars of sour orange (seedless, sweet seeded, Brazilian and Spanish), common sweet orange (Florida, Fsido, Shamoty, and Valencia) and navel orange B29 from four different areas in Egypt (El-Qalubaiya governorate, Wadi El-Mollak;...

Author(s): Hala F. Ahmed

November 2012

Productivity of Acacia angustissima accessions at two sites in the subtropics

  Low leaf biomass yields coupled with small land sizes are some of the major constraints faced by smallholder farmers that grow protein-rich fodder trees and shrubs. Given these challenges, availability of highly productive seed sources would be important to enable farmers to produce leaf fodder in sufficient quantities. 14 accessions of Acacia angustissima were evaluated for leaf, wood and total...

Author(s): B. I. Nyoka, G. Sileshi, F. K. Akinnifesi, L. Matarirano, S. Mng’omba, B. O. Mavhankeni and E. Bhebhe

November 2012

Prediction of spatial distribution for some land use allometric characteristics in land use planning models with geostatistic and Geographical Information System (GIS) (Case study: Boein and Miandasht, Isfahan Province, Iran)

  Although traditional census can present unbiased information about different land uses, it is spatial independent and do not present particular information about spatial distribution of studied characteristic. In this study, we used geostatistic and Geographical Information System (GIS) to estimate some different land uses allometric characteristics in Isfahan Province (Iran). Thus, samples information was...

Author(s): Parvaneh Peykanpourfard, Masoud Monavvari, Ali Asghar Alesheikh, Atefeh Chamani and Fariba Ghanbari

November 2012

Quantitative traits in wheat (Triticum aestivum L. cv. 'Novosadska rana 5') grown on pseudogley soil depending on lime rates

  The effect of the use of different lime rates on the pH values and subsequently on the quantitative traits in wheat (Triticum aestivum L. cv. 'Novosadska rana 5') was investigated on the pseudogley type of soil. Of the quantitative traits in wheat, spike length, number of spikes per m2, grain mass per spike, number of grains per spike and 1000-grain weight, were studied as the most significant...

Author(s): Gordana Šekularac, Senad Murtić, Milena Djurić, Biljana Veljković, Dragica Stojiljković, Tanja Stevović and Nikola Bokan

November 2012

Fragrance analysis using molecular and biochemical methods in recombinant inbred lines of rice

  The aroma or fragrance of Basmati rice is associated with the presence and content of the chemical compound, 2-acetyl-1-pyrroline and the trait is monogenic recessive. Several polymerase chain reaction (PCR)-based co-dominant markers based on RG28 locus were developed, which can differentiate between fragrant and non-fragrant rice cultivars. For molecular and biochemical analysis of  aroma,...

Author(s): Pummy Kumari, Uma Ahuja, Sunita Jain and R. K. Jain

November 2012

Toxicological responses in alfalfa (Medicago sativa) under joint stress of cadmium and napropamide

  Joint effects of Cd2+ and napropamide in seeds, roots or leaves of alfalfa were investigated under different treatments. It was shown that single stress of Cd2+ or napropamide decreased chlorophyll content after 30 days of treatment in different concentrations. The decrease in chlorophyll content became insignificant under joint stress of Cd2+ and napropamide....

Author(s): Zhaoxiang HAN,, Dandan WU, Zhen ZhU, Chunxia LÜ and Yurong LIU

November 2012

Glucose (xylose) isomerase production from thermotolerant and thermophilic bacteria

  Glucose (xylose) isomerase (GI) is one of the most important industrial enzymes. It is used widely to catalyze the reversible conversion of D-glucose to D-fructose in vivo. The latter is used on a wide scale in the production of the high fructose corn syrup (HFCS) from corn starch. The great need of a thermostable GI, which is still active at higher temperatures (up to 90°C), opened the door to...

Author(s): Tayseer M. A. Abdel-rassol, Shereen A. Badr and Helmy T. Omran

November 2012

Substitution of soyabean meal with bioactive yeast in the diet of Clarias gariepinus: Effect on growth rate, haematological and biochemical profile

  The effects of substituting soyabean meal with yeast (Sacharomyces cerevisae) meal in diets fed to Clarias gariepinus was studied for 60 days. Growth response, haematological and biochemical parameters were evaluated. 105 juvenile three-weeks old C. gariepinus composed of seven treatment groups replicated thrice were used for the study. Each replicate had five fishes. The Groups (A to G)...

Author(s): Ngozi Evelyn Ezenwaji, Ada Iluno, Chinedu Atama, Chukwuemeka Onyekachi Nwaigwe and Chioma Uchenna Nwaigwe

November 2012

Probiotic effect of Lactobacillus acidophilus against vibriosis in juvenile shrimp (Penaeus monodon)

  The application of effective probiotics in shrimp aquaculture is an excellent alternative for chemicals and antibiotics to prevent disease control. This study was carried out to evaluate the probiotic potential of Lactobacillus acidophilus 04 (home made curd isolate) on pathogenic Vibrio in shrimp Penaeus monodon juveniles. L. acidophilusshowed antibacterial activity...

Author(s): Natesan Sivakumar, Muthuraman Sundararaman and Gopal Selvakumar

November 2012

Physical, chemical and organoleptic characteristics of smoked skipjack tuna (Katsuwonus pelamis) produced in Kendari-South East Sulawesi

  Physical, chemical and organoleptic characteristics of smoked skipjack tuna (Katsuwonus pelamis) produced in Kendari-South East Sulawesi had been studied. Samples were collected from four producers where direct smoking method was used. Three of the smoked fish producers used coconut shell (Cocos nucifera) as smoke resource, while one producer used a combination of coconut shell (C. nucifera) and...

Author(s): Kobajashi T. Isamu, Hari Purnomo and Sudarminto S. Yuwono