Abbreviation: J. Evol. Biol. Res.
Start Year: 2009
Page 1 of 2, showing 20 records out of 32 total, starting on record 1, ending on 20
DOI: 10.5897/JEBR2014.0062[Article Number: 241F47261238]
A wide range of life-history tactics can be found within salmonid fish. The genetic basis for these adaptations remains largely unknown, but we have sought to investigate any large scale genetic changes associated with a non-anadromous life cycle. After the most recent ice age (approximately 9,500 years ago), some populations of Atlantic salmon Salmo salar L., were trapped in fresh water and developed into isolated... Read more.
DOI: 10.5897/JEBR2014.0059[Article Number: C33127849694]
Impact of phytojuvenoid on commercial parameters in Bombyx mori, a monophagous insect, was studied. The variation in the phytojuvenoid concentration significantly influenced the length of cocoon and the number of larval treatment did not cause significant influence on the length of cocoon of B. mori. The length of cocoon increased from 2.88 cm (control) to the maximum level of 3.65 cm in 30% phytojuvenoid concentration... Read more.
DOI: 10.5897/JEBR2013.0054[Article Number: 93CA06048098]
The embryogenic ability of two cassava cultivars (Sandpaper and TMS 60444) was investigated by culturing their young leaf lobes on an induction medium (DKW2 50P). The explants formed organized embryogenic structures regardless of the concentration of picloram in the medium. Organized embryogenic structures induction was enhanced by increasing the concentration of picloram in the induction medium for both cultivars. The... Read more.
DOI: 10.5897/JEBR2014.0058[Article Number: 4658D2D45680]
Castor bean (Ricinus communis L.) is a myrmecophytic plant species with specialized extrafloral nectar (EFN) glands that serve to attract predatory insects, which in return defend plant-tissues against herbivores. The EFN glands on castor bean plants are located along the leaf petioles as well as on the peduncles of its imperfect (unisexual) flowers. This field-project evaluates the richness, diversity, and species... Read more.
DOI: 10.5897/JEBR2013.0053[Article Number: 9E451C944944]
Taxonomic survey of the crustacean community was conducted at five study sites in Wular Lake. Plankton samples were collected on monthly basis from September 2010 to August 2011 and identified in the laboratory under different magnifications using the Olympus microscope. Of the 42 taxa identified, 23 were Cladocera, 16 were Copepoda and only three were Ostracoda. Among the Copepoda, one taxa namely Cyclops latipes seems... Read more.
DOI: 10.5897/JEBR2012.0042[Article Number: D5D0F6A4559]
Malathion is a chemical pesticide, commonly used by Egyptian farmers; however, its contamination of water sources has become an important issue. It is suggested that the role of vitamin C in alteration of enzymes responsible for energy metabolism was induced by administration of Malathion. The effect of malathion and malathion with vitamin C on some enzymes in the rat were recorded in the present study. Significant... Read more.
DOI: 10.5897/JEBR2013.0049[Article Number: 8F88C244573]
The anatomical characteristics of leaf blades of the major species of sect. Elymus, sect. Turczaninoviaand sect. Macrolepis in Elymus were examined. The results showed that: (1) The leaf epidermis usually consists of long and short cells, stomatal apparatus and prickle -hairs. It belongs to the typical festucoid type. Its long-cells are usually rectangle and its cell-walls are thin and straight... Read more.
DOI: 10.5897/JEBR12.008[Article Number: 7D95D4E4502]
The objectives of this research were to identify the allelic frequency of growth hormone MspI enzyme-restriction, to define the genetic inequilibrium in selected superior and inferior body weight groups of the cows (G0) and to upgrade genetically the genetic equilibrium of their Ongole-crossbred progenies (G1) population. A total of 74 blood samples were collected from G0 and G1 at the artificial insemination... Read more.
DOI: 10.5897/JEBR12.009[Article Number: 7E658F94521]
The effect of flooding on gene expression of four tomato genotypes was studied under a controlled environment. Four different flooding treatments (0, 2, 4, and 8 days) were used for flooding tolerance in four tomato genotypes. The experiment was laid out in a randomized split plot design with flooding treatment as main plot and the genotypes subplot. Treatments were replicated five times. The results show that with each... Read more.
DOI: 10.5897/JEBR12.006[Article Number: 5D161134419]
This study aims to detect the molluscicidal properties of the pesticides Basudin and Selecron and the phytoalkaloid Colchicine against Biomphalaria alexandrina snails including their infection withSchistosoma mansoni, production of cercariae, the levels of total protein, globulin and albumin and the activities of alanine and aspartate transaminases (AlT and AsT) and acid and alkaline phosphatases... Read more.
DOI: 10.5897/JEBR12.010[Article Number: A51E61A4443]
In this study, the lytic phage for multidrug-resistant (MDR) Pseudomonas aeruginosa was isolated; this phage belongs to the Myoviridae and Siphoviridae. Analysis of its genome sequences highlighted by different antibiotic resistance gene primers offered the most direct and sensitive method of determining the therapeutic status of this lytic phage. Interestingly, this approach reveals... Read more.
DOI: 10.5897/JEBR11.014[Article Number: 92F4A064354]
Laparoscopic intrauterine artificial insemination (LAI) refers to a special technique by which the operation is done through several small holes in the abdomen with the aid of telescope. These incisions are much smaller than wound required in traditional surgery. This study aimed to evaluate the efficacy of laparoscopic artificial insemination. To increase the pregnancy and twins rate by using... Read more.
DOI: 10.5897/JEBR12.001[Article Number: 6D768364367]
The present study aimed to investigate the effect of chronic administration of chocolate brown HT or chocolate brown HT with oil on norepinephrine (NE), dopamine (DA) and gamm-aminobutyric acid (GABA) contents in different brain areas (cerebellum, striatum, cerebral cortex, hypothalamus, brain steam and hippocampus) and liver and kidney functions of male albino rats. In addition, histopathological examinations of the... Read more.
DOI: 10.5897/JEBR12.007[Article Number: EC5E5454468]
The main aim of this work was to determine the consumption capacity of five aquatic insects (as predators) on four species of medical snails (as preys) tested under four values of pH at a constant and controlling temperature in the laboratory. The predators were represented by adults of two hemipterous species (Limnogeton fieberi Mayr, Sphaerodema urinator Duf.) and three nymph odonatous species... Read more.
[Article Number: 9AC69D34314]
This study evaluated, using replicated laboratory bioassays, the toxicities of the ethanolic extracts ofDalbergia sissoo (family Leguminosae) fruits, leaves, roots and stem bark against adult Biomphalaria alexandrina, the snail intermediate host of Schistosoma mansoni in Egypt and their egg masses. Adult snails (6 to 8 mm in diameter) and viable 24 h-old embryonated egg masses were separately exposed... Read more.
[Article Number: FFF083A4324]
The effect of sublethal concentrations of Euphorbia milii latex on the infectivity of the larval stages ofSchistosoma mansoni to Biomphalaria alexandrina and to albino mice as well on these larval stages ofS. mansoni (miracidia and cercariae) were studied. The results showed that B. alexandrina infection with S. mansoni miracidia was greatly reduced by... Read more.
[Article Number: 17042163728]
We investigated the sex specific effect of Serratia marcescens infection through septic injury on two components of fitness, survivorship and adult competitive reproductive fitness in male and femaleDrosophila melanogaster. Under competitive conditions, infected females showed significantly lower reproductive output compared to control females. However, male reproductive fitness was not affected by... Read more.
[Article Number: D831C1F3747]
The effect of methanol extract of Adenium obesum on reproduction, hatchability of eggs of Bulinus truncatussnails was studied. In addition, total protein contents and the activities of the transaminases (AST and ALT) and phosphatases (ACP and AKP) enzymes in hemolymph and tissues of snails treated with tested plant were determined. The present results showed that the molluscicidal activity of methanol... Read more.
[Article Number: 46143AF3540]
For the first time, a rich fossil assemblage of tapic carbonaceous metaphytes referable to eukaryotic algae, preserved on the bedding surface of grey carbonaceous shales belonging to Saraipali Formation of Singhora Group, Chhattisgarh Supergroup, is being recorded in and around Tushgaon village, Mahasamund District, Chhattisgarh state. The present enigmatic bona-fide fossil assemblage includes 12 taxa: Tuanshanzia... Read more.
[Article Number: 6F15AD93682]
The present investigation aims to throw light on the effect of methylene chloride and normal hexane extracts of Azadirachta indica, Citrullus colocynthis, Ammi majus and Mentha microphylla on the 4thlarval instar of the cotton leaf worm, Spodoptera littoralis under laboratory conditions. The results showed that the methylene chloride extract of A. indica, C.... Read more.
Page 1 of 2, showing 20 records out of 32 total, starting on record 1, ending on 20