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143 results for “Species Concentration”
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Research ArticleOpen accessIn the abstractAntioxidant Activity of Brown Algae Sargassum species Extract from the Coastline of Java IslandSiti A. Budhiyanti, Sri Raharjo, Djagal W. Marseno, Iwan Y.B. LelanaThe coastlines with rocky shores at Java Island Indonesia, Gunung Kidul (Yogyakarta) and Jepara (Central Java), have abundant resources of brown algae Sargassum sp. Little effort, however, has been made to explore the antioxidant potential of the algae harvested from these area. Tropical brown algae have proven to produce a very effective antioxidant defence system due to the strong UV … …American Journal of Agricultural and Biological Sciences, Vol. 7, Issue 3 · 30 Aug 2012 · 9,907 accessesView PDFCite
Research ArticleOpen accessIn the abstractAntioxidant and Photosynthetic Responses in Plants Under Boron Toxicity: A ReviewLucia Guidi, Alberto Pardossi, Elena Degl’Innocenti, Marco LandiBoron (B) is a micronutrient that has long been known essential not only for plants and animals. Otherwise, in crop plants the range of B concentration from essentiality to toxicity appears extremely narrow. Although B deficiency has been well investigated, during recent years many researchers have also investigated boron toxicity effects, making progress in the comprehension of boron transport within … …American Journal of Agricultural and Biological Sciences, Vol. 7, Issue 3 · 5 Jul 2012 · 12,769 accessesView PDFCite
Research ArticleOpen accessIn the abstractAdvances in Menaquinone-7 Production by Bacillus subtilis Natto: Fed-Batch Glycerol AdditionAydin Berenjian, Raja Mahanama, Andrea Talbot et al.Menaquinone-7 was produced by fermentation mainly using Bacillus subtilis species. Due to the low concentration of menaquinone-7 in fermentation processes and the associated expense of recovering the menaquinone-7, it was desirable to improve the fermentation concentration. The aim of this study was to determine the effect of fed-batch glycerol addition in the production of menaquinone-7 during the fermentation of Bacillus … …American Journal of Biochemistry and Biotechnology, Vol. 8, Issue 2 · 22 Jun 2012 · 10,545 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Dose-Response of Zinc and Manganese on Siderophores ProductionMehri Ines, Khessairi Amel, Turki Yousra et al.Problem statement: This study was conducted to find and determine whether the siderophores of the four environmental Pseudomonas spp. isolates possess a sequestering activity towards essential transition metals (Zn and Mn) other than iron. Approach: Four fluorescent Pseudomonads isolated from various environments, were characterized analytically (Isoelectric focusing), biologically (pyoverdine-mediated uptake) and genetically (16S rDNA sequencing). By means of spectrophotometric measurements, … …American Journal of Environmental Sciences, Vol. 8, Issue 2 · 10 Mar 2012 · 7,772 accessesView PDFCite
Research ArticleOpen accessIn the abstractBiomagnification Profiles of Trace Elements through the Food Web of an Integrated Shrimp Mangrove Farm in Ba Ria Vung Tau, South VietnamNguyen Phuc Cam Tu, Nguyen Ngoc Ha, Hiroaki Matsuo et al.Problem statement: Ba Ria Vung Tau (BRVT), a Vietnamese province with one of the fastest growing economies in the country, faces significant environmental challenges, including increased contamination of rivers and estuaries with urban and industrial wastes. Approach: Concentrations of 23 trace elements and stable isotope ratios (δ13C and δ15N) were analyzed in suspended particulate matter, one species of peanut worm, … …American Journal of Environmental Sciences, Vol. 8, Issue 2 · 9 Mar 2012 · 7,805 accessesView PDFCite
Research ArticleOpen accessIn the abstractAltered Reproduction in Clarias gariepinus Exposed to Industrial EffluentsAdeogun Aina Olubukola, Chukwuka Azubuike VictorProblem statement: Reproductive success is a key factor in determining species survival and the unregulated discharge of industrial effluents into rivers and streams in a developing country like Nigeria, can impair reproductive ability in non-target organisms like fish. Fish, generally accumulate contaminants from their environment in their tissues and these can be transmitted through the yolk lipids to the eggs. … …American Journal of Agricultural and Biological Sciences, Vol. 7, Issue 1 · 21 Feb 2012 · 7,708 accessesView PDFCite
Research ArticleOpen accessIn the abstractThermodynamic Characteristics of Camel’s Urine as an Inhibitor for Mild Steel in 1.5 M H2SO4 Acid SolutionEhteram A. Noor, Azza A. Al-Ghamdi, Aisha H. Al-MoubarakiProblem statement: The corrosion inhibition of mild steel in 1.5 M H2SO4 by Camel’s Urine (CU) addition was evaluated at five different temperatures in the range from 30-70°C by weight loss measurements. CU acts as a good inhibitor for the corrosion of mild steel in 1.5 M H2SO4. The value of inhibition efficiency increases with increasing both inhibitor concentration and … …American Journal of Applied Sciences, Vol. 8, Issue 12 · 22 Oct 2011 · 7,373 accessesView PDFCite
Research ArticleOpen accessIn the abstractFluctuations of Phytoplankton Community in the Coastal Waters of Caspian Sea in 2006Siamak Bagheri, Mashhor Mansor, Marzieh Makaremi et al.Problem statement: The Caspian Sea ecosystem has been suffered with many problems since 1980s. Aanthropogenic pollution from heavy metals, hydrocarbons, pesticides, changes in the quantity of nutrient inputs by rivers, are significant threats to biodiversity and biological resources such as plankton structure in the Caspian Sea. According to the significant of phytoplankton community in marine system. The state of the … …American Journal of Applied Sciences, Vol. 8, Issue 12 · 20 Oct 2011 · 8,460 accessesView PDFCite
Research ArticleOpen accessIn the abstractRoot Elongation, Root Surface Area and Organic Acid by Rice Seedling Under Al3+ and/or H+ StressA. Elisa Azura, J. Shamshuddin, C.I. FauziahProblem statement: Under acidic condition, Al3+ is the most common species in solution. An experiment was conducted to study the effects of Al and/or pH on rice seed germination, root morphology and organic acids release. This study was conducted at ambient temperature in Malaysia. Approach: Two experiments were conducted: (1) Rice seeds undergoing germination were exposed to 0.5 mM CaCl2 … …American Journal of Agricultural and Biological Sciences, Vol. 6, Issue 3 · 4 Aug 2011 · 9,530 accessesView PDFCite
Research ArticleOpen accessIn the abstractUncommon Toxicologic Profile at Toxic Doses of CPI-613 (an Agent Selectively Alters Tumor Energy Metabolism) in Rats and Minipigs Reflects Novel MechanismClaudia Maturo, King C. Lee, Robert Rodriguez, Robert ShorrProblem statement: CPI-613 is a novel anticancer agent and the toxicological profile has not been assessed. Accordingly, the objective of these studies was to thoroughly evaluate the Toxicokinetic (TK) effects of CPI-613 in rats and to compare the toxicological profile of rats to minipigs to determine if there were differences between the two animal species. Approach: These studies involved assessments … …American Journal of Pharmacology and Toxicology, Vol. 5, Issue 4 · 13 Jun 2011 · 9,584 accessesView PDFCite