African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12179

Table of Content: 26 April 2010; 9(17)

April 2010

Inhibitory effect of essential oil on aflatoxin activities

Aflatoxins, which are well-known to be mutagenic, carcinogenic, teratogenic, hepatotoxic and immunosuppressive, also inhibit several metabolic systems. Aflatoxins are biologically active secondary metabolites produced by certain strains of Aspergillus parasiticus, Aspergillus nominus and Aspergillus flavus. Many different substances, such as essantial oils, flavanoids, could inhibit the aflatoxin...

Author(s): Lokman Alpsoy

April 2010

The potential roles of lime and molybdenum on the growth, nitrogen fixation and assimilation of metabolites in nodulated legume: A special reference to Phaseolus vulgaris L.

Most soils in sub-Saharan Africa are acidic and have low contents of calcium (Ca2+), magnesium (Mg2+) and molybdenum (Mo). Higher concentrations and contents of hydrogen ion (H+), aluminium (Al3+) and manganese (Mn2+) found in these acidic soils are known to be the major causes of poor plant growth due to their toxicity effects to plants and micro organisms such as N-fixing bacteria. Molybdenum is also a component of...

Author(s): Sylvie Bambara and Patrick A. Ndakidemi

April 2010

Probiotic potential of spontaneously fermented cereal based foods – A review

The realization that food has a role beyond provision of energy and body forming substances has shifted scientific investigations with growing interest in the research and development of functional foods. A lot of attention is being focused on probiotics due to the enormous support showing health benefits. Probiotics are associated with fermented foods and it is therefore of importance that spontaneously fermented...

Author(s): Christine M. Kalui, Julius M. Mathara and Philip M. Kutima

April 2010

Mining olive genome through library sequencing and bioinformatics: Novel sequences and new microsatellites

As one of the initial steps of olive (Olea europaea L.) genome analysis, a small insert genomic DNA library was constructed (digesting olive genomic DNA withSmaI and cloning the digestion products into pUC19 vector) and randomly picked 83 colonies were sequenced. Analysis of the insert sequences revealed 12 clones that have no matches to previously characterized/ confirmed sequence records, and 5 insert sequences...

Author(s): Ekrem Dundar and Oznur Suakar

April 2010

Effects of some humidity and IBA hormone dose applicatıons on rooting of M9 apple clonal rootstock Softwood top cuttings

In this study, softwood cuttings were taken from M9 dwarf apple rootstocks in early June. Different indole-3-butyric acid (IBA) concentrations [0 (control), 500, 1500, 2500 and 3500 ppm], different air humidity levels (85 - 90%, 95-100%) and rooting media of perlite effects on rooting capability and root...

Author(s): N. Ersoy, I. H. Kalyoncu, M. Aydin and M. Yilmaz

April 2010

Effect of municipal wastewater with manure and fertilizer on yield and quality characteristics of forage in corn

In order to study the effects of wastewater with two kinds of fertilizers (manure and chemical fertilizer) on yield and quality characteristics of forage in corn, a field experiment was conducted in the University of Zabol in Iran during 2007 growing season. The experiment was conducted in split plot design with three replications. The treatment were comprised of two levels of irrigation water (W1 = Well water...

Author(s): Abolfazl Tavassoli, Ahmad Ghanbari, Ebrahim Amiri and Yousef Paygozar

April 2010

Activities of some enzymes associated with oxygen metablolism, lipid peroxidation and cell permeability in dehydrated Malus micromalus seedlings

Measurements were made on the relative water content, cell permeability, superoxide dismutase (SOD) activity, catalase (CAT) activity and malondialdehyde (MDA) content in Malus micromalus seedling during dehydration in vitro in whole seedling and during dehydration in culture of different PEG 6000 concentration. The results indicated  that SOD and CAT activities increased during dehydration from...

Author(s): Zhang Jie, Kong Yun, Wang Shaohui and Yao Yuncong

April 2010

Larvicidal efficacy of Toddalia asiatica (Linn.) Lam against two mosquito vectors Aedes aegypti and Culex quinquefasciatus

The hexane, acetone and methanol extracts of mature fruits and leaves fromToddalia asiatica was investigated to establish its bio-control potentiality under laboratory condition against fourth instars larvae of Dengue vector, Aedes aegyptiand Filarial vector, Culex quinquefasciatus. Hexane extract of fruits of T. asiaticashowed highest larvicidal activity against both mosquito vector....

Author(s): Borah R., Kalita M. C., Kar A. and Talukdar A. K.

April 2010

Use of oregano (Origanum onites L.) essential oil as hatching egg disinfectant

This study was carried out to determine whether oregano (Origanum onites) essential oil works as a disinfectant for hatching egg obtained from broiler breeder flock. Oregano essential oil was applied at two doses 0.55 and 0.75 µl/cm3 and two exposure times, 3 and 6 h. The formaldehyde treated eggs were used as positive control and untreated eggs used as negative control. After chemical analysis, the main...

Author(s): Gulsen Copur, Mehmet Arslan, Metin Duru, Mikail Baylan, Sibel Canogullari and Emine Aksan

April 2010

Antioxidant and antimutagenic activities of Viscum album fruit ethanolic extract in human lymphocytes

Polyphenolic compounds are widely distributed in plants and known to be excellent antioxidants in vitro. They have the capacity to reduce free-radical formation by scavenging free-radicals. In this study we have evaluated the antioxidant and antimutagenic potencies of polyphenolic compounds of Viscum album against trichloroethylene (TCE)-induced oxidative and genotoxic damage. V. album extract...

Author(s): L. Alpsoy, I. Uzonur, M. S. Sakcali and S. Karaman

April 2010

The reproductive biology and the histological and ultrastructural characteristics in ovaries of the female gadidae fish Merluccius merluccius from the Egyptian Mediterranean water

Monthly analysis of the maturity stages distribution revealed that the gadidae fish Merluccius merluccius has a long spawning period extending from early January to early June. All the females over 34.4 cm in body length are mature. The peak value of gonadosomatic index (GSI) was attained in January and continued to May and thereafter decreased gradually from June to August. The analysis of ova diameter revealed that...

Author(s): Mohamed, Abd.El-G.Al-Absawy

April 2010

Adsorption kinetics of cadmium and lead by chitosan

An evaluation of the kinetics and capacity of chitosan to trap lead and cadmium ions in aqueous solution was carried out at 25oC using concentration and contact time as parameters. The experiments were done as batch process. Our results show that the adsorption process is concentration-driven with high capacity of chitosan for the adsorption of these metal ions. The Infra red spectroscopic study on the chitosan and the...

Author(s): Bamgbose J. T, Adewuyi S, Bamgbose O and Adetoye A. A

April 2010

Fouling and boring organisms deteriorating various European and tropical woods at Turkish coastline

This study aims to investigate the diversity of fouling and boring organisms damaging wood material at Turkish coasts. Trials were carried out at six harbour sites throughout the seas surrounding Turkey. Various Euopean and tropical wood samples were hanged down at a depth of six meters in the sea for a period of one year. Identification of the organisms obtained from wood panels revealed the presence of five wood borer...

Author(s): Selim Sen, Huseyin Sivrikaya, Mesut Yalcin, Ahmet Kerem Bakir and Bilal Öztürk

April 2010

The ultrasonic effect on the mechanism of cholesterol oxidase production by Brevibacterium sp.

The effects of ultrasonic radiation on cholesterol oxidase production byBrevibacterium sp. are studied in this paper. An ultrasonic wave with low intensity at 20 kHz, 200 W/ cm2 was employed to study the effects of irradiation at different lengths of time on the growth of Brevibacterium sp. cells. The result showed that the production of cholesterol...

Author(s): Shengli Yang, Hui Zhang and Wu Wang

April 2010

Effect of melatonin on in vitro maturation of bovine oocytes

To investigate the effect of different concentrations of melatonin on bovine oocytesin vitro maturation, varying concentrations of melatonin (0, 0.01, 1, 100 µM), were included in the the maturation medium. Slaughterhouse derived oocytes were subjected to standard in vitro maturation procedures in high oxygen tension. After culture for 24 h, over 80% of COCs had full cumulus...

Author(s): Abbas Farahavar, Ahmad Zare Shahne, Hamid Kohram and Vahid Vahedi