Biodiversity is defined as the concentration and variety of plant and animal life forms on earth. According to Emani, “it is a vital corner stone for both the survival and welfare of our existence”. This is so because biodiversity provides an array of ecosystem services such as production of oxygen, sequestration of carbon, fixing of nutrients (nitrogen and phosphorus), purification of air and water, stabilization of soil, and provision of biomass for food and energy. Biodiversity also supplies cultural benefits such as locations for recreation or aesthetic appreciation, societal feast, religious and ceremonial events. Moreover, biodiversity has economic value such as provision of food, fuel, fibers, pharmaceutical and building materials.To Know more Click: http://www.scitechnol.com/biodiversity-management-forestry.php
Biodiversity describes the variability among living organisms and the ecosystems of which they are part. Three conceptual levels of biodiversity are recognized – ecosystem, species and genetic. Forests are the most diverse ecosystems on land, because they hold the vast majority of the world’s terrestrial species, providing a habitat for a multitude of flora and fauna. Forest biodiversity is a broad term that refers to all life forms found within forested areas and the ecological roles they perform. Forest biodiversity encompasses not just trees, but the multitude of plants, animals and micro-organisms that inhabit forest areas and their associated genetic diversity. The complexity and rich diversity of life found in forests provides many vital services to human beings. Forests unfold an exceptionally large ecosystem volume and expose a vast biotic surface, providing crucial ecosystem functions and services, including carbon sequestration and regional climate regulation. Thus, Healthy forest ecosystems are ecological life-support systems. To Know more Click: http://www.scitechnol.com/biodiversity-management-forestry.php
Purification and Characterization of Heparin Binding Proteins from Seminal Plasma of Cross- bred Cattle Bulls by Affinity Chromatography, SDS-PAGE and Mass Spectrometery
Heparin binding proteins (HBP) play a crucial role in the fertility of bovine semen. In this study HBPs purified from cross-bred cattle bull seminal plasma (SP) by sepharose-affinity chromatography were characterized by SDS-PAGE, and mass- spetrometery. Affinity chromatographic analysis indicated two peaks of unbound (non-HBP) and bound proteins (HBP). On average, seminal plasma of cross-bred bulls contained 39.36 ± 4.41% HBP with a peak area of 2.74 ± 0.82 cm2. Sixteen bands with molecular weights ranging from 14 kDa to 150 kDa could be separated by SDS-PAGE from seminal plasma of 11 bulls. SDS-PAGE analysis of the eluted HBP peaks identified 14 bands, with molecular weights ranging from 14 kDa to 150 kDa. However, variation in number of bands, separated in SP and SP-HBP was observed among the bulls. The matched peptides of 60; 40, 35; 31, 28; 25 and 20 kDa proteins with highest score (>61-67) were identified to have significant matching with the peptides of Platelet activatin factor AH; Clusterin preprotein; DNase1-L3 and TIMP-2, respectively. This study envisaged that four characterized SP-BHPs have important functions in reproduction. Moreover, role of DNASE-1L-3 and TIMP-2 kDa proteins is related to higher conception rate of bovine. Therefore, this study opens a further scope to analyze these SP – HBP as potential biomarkers of fertility in cross – bred bulls to read more http://www.scitechnol.com/peer-review/purification-and-characterization-of-heparin-binding-proteins-from-seminal-plasma-of-cross-bred-cattle-bulls-by-affinity-chromatog-FbYN.php?article_id=4983
Comparison of Biomass Growth in Microcystis aeruginosa Cultures Supplemented With Commercial Culture Mediums F2 and BG-11
In the study physiochemical composition of two commercial culture mediums, F2 and BG-11, used in the culture of microalgae and cyanobacteria was compared. Also influence of the medium on Microcystis aeruginosa growth has been evaluated. The following elements were determined in the culture medium: nitrite nitrogen, nitrate nitrogen, ammonia nitrogen, reactive phosphorus, and Redfield ratio. The increase of cyanobacteria was determined on the basis of chlorophyll “a” measurement. A substantial accretion in the cyanobacteria biomass growth was noticed in the culture supplemented by BG-11 medium, and the differences in its increase was statistically significant.
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Marine fish are exposed to many diseases, especially bacterial one, where #bacteria play the main role in occurrence of the disease and causing high economic losses in proposed marine aquaculture sector in Red Sea governorate and hence our study carried out in order to isolate and identified the bacterial isolates affecting economic marine fishes in Egypt as well as evaluate the effect of seasonal variation.
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Analysis of Variability in Embryological Response of Two Sea Urchin Species to Spatial and Temporal features-Can these Factors Influence Responses in Standardized Ecotoxicological Assays?
The use of Echinoderms as bioindicator organisms, in particular in emryotoxicity test with Paracentrotus lividus and Arbacia lixula, has provided the scientific community with a remarkable number of ecotoxicological studies. In this experiment, the responses of these two species were analysed considering the spatial and temporal variability of three populations distributed in a radius of ca 10 km. The species tested in this experiment demonstrated an overall substantial different response towards metals (p<0.001), Arbacia lixula being the most sensitive species to both the three different sites and different periods of the year when adults were collected. There was a significant difference among populations for both species.
Ultraviolet-A (UV-A) light induce DNA damage by creating pyrimidine dimers, or indirectly affects DNA by the formation of reactive oxygen species. The objective was to determine DNA damage by micronucleus test in neonatal rats exposed to UV-A light. Rat neonates were exposed to light from a LED lamp (control group), to UV-C light 254 nm (control group to desquamation skin) or UV-A light 365 nm and in one group the dams were supplemented with folic acid (FA), to determine micronucleated erythrocytes (MNE) and micronucleated polychromatic erythrocytes (MNPCE) in peripheral blood of offspring.