Synergism and Efficacy of Some Naturally Occurring D-Amino Acids against Clinically Relevant Bacterial and Fungal Species = التآزر التفاعلي و الفاعلية المرتبطة ببعض نظائر الأحماض الأمينية المتوافرة طبيعيا ضد أنواع بكتيرية و فطرية ذات أهمية سريرية

2014 ◽  
Vol 7 (3) ◽  
pp. 199-212 ◽  
Author(s):  
Sanaa K. Bardaweel ◽  
Rula M. Darwish ◽  
Muhammed H. Alzweiri
Keyword(s):  
Amino Acids ◽  
Fungal Species ◽  
Naturally Occurring

scholarly journals Regulation of rat magnocellular neurosecretory system by D-aspartate: evidence for biological role(s) of a naturally occurring free D-amino acid in mammals

2000 ◽  
Vol 167 (2) ◽  
pp. 247-252 ◽  
Author(s):  
H Wang ◽  
H Wolosker ◽  
J Pevsner ◽  
SH Snyder ◽  
DJ Selkoe
Keyword(s):  
Gene Expression ◽  
Amino Acids ◽  
Amino Acid ◽  
Physiological Function ◽  
Neurosecretory System ◽  
Milk Ejection ◽  
Magnocellular Neurons ◽  
Rat Hypothalamus ◽  
Naturally Occurring

Little evidence is available for the physiological function of D-amino acids in species other than bacteria. Here we demonstrate that naturally occurring freed -aspartate (D-Asp) is present in all magnocellular neurons of rat hypothalamus. The levels of this naturally occurring D-amino acid were elevated during lactation and returned to normal thereafter in the magnocellular neurosecretory system, which produces oxytocin, a hormone responsible for milk ejection during lactation. Intraperitoneal injections of D-Asp reproducibly increased oxytocin gene expression and decreased the concentration of circulating oxytocin in vivo. Similar changes were observed in the vasopressin system. These results provide evidence for the role(s) of naturally occurring free D-Asp in mammalian physiology. The findings argue against the conventional concept that only L-stereoisomers of amino acids are functional in higher species.

Adsorption of carbon dioxide on naturally occurring solid amino acids

2016 ◽  
Vol 4 (3) ◽  
pp. 3170-3176 ◽  
Author(s):  
Sreedipta Chatterjee ◽  
Sadhana Rayalu ◽  
Spas D. Kolev ◽  
Reddithota J. Krupadam
Keyword(s):  
Carbon Dioxide ◽  
Amino Acids ◽  
Naturally Occurring

scholarly journals Transporters in Arabidopsis roots mediating uptake of amino acids at naturally occurring concentrations

2011 ◽  
Vol 191 (2) ◽  
pp. 459-467 ◽  
Author(s):  
Henrik Svennerstam ◽  
Sandra Jämtgård ◽  
Iftikhar Ahmad ◽  
Kerstin Huss-Danell ◽  
Torgny Näsholm ◽  
...  
Keyword(s):  
Amino Acids ◽  
Naturally Occurring

Effects of some Amino-acid and Purine Antagonists on Chick Embryos

Development ◽  
1958 ◽  
Vol 6 (2) ◽  
pp. 365-372
Author(s):  
C. H. Waddington ◽  
Margaret Perry
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Effective Concentration ◽  
Metabolic Inhibitors ◽  
Chick Embryos ◽  
Purine Analogue ◽  
Know How ◽  
Naturally Occurring ◽  
Different Types ◽  
Strong Action

Several authors have studied the effects on developing embryos of substances which are analogues of naturally occurring amino-acids and purines, and known to act, in other systems, as metabolic inhibitors. It was emphasized by Waddington, Feldman, & Perry (1955) that any particular substance may exhibit very different effects in embryos of different types. They found, for instance, that the purine analogue 8-azaguanine has a very strong action in the chick and a much lesser one in the newt embryo. It is therefore necessary to consider the various classes of embryos separately. In this communication we shall be concerned only with chick embryos. Substances under test can be administered to such embryos by injection through the shell, as was done in the paper cited above With this technique it is impossible to know how much diffusion takes place of the substance injected, and one cannot therefore be certain of the effective concentration which actually reaches the embryo.

scholarly journals Microbial Degradation of Different Hydrocarbon Fuels with Mycoremediation of Volatiles

2020 ◽  
Vol 8 (2) ◽  
pp. 163 ◽  
Author(s):  
Agota Horel ◽  
Silke Schiewer
Keyword(s):  
Fungal Species ◽  
Bacterial Degradation ◽  
Contaminant Removal ◽  
Total Hydrocarbon ◽  
Diesel Fuels ◽  
Naturally Occurring ◽  
Surface Contaminants ◽  
Favorable Conditions ◽  
Hydrocarbon Substrates ◽  
Growth Of Fungi

Naturally occurring microorganisms in soil matrices play a significant role in overall hydrocarbon contaminant removal. Bacterial and fungal degradation processes are major contributors to aerobic remediation of surface contaminants. This study investigated degradation of conventional diesel, heating diesel fuel, synthetic diesel (Syntroleum), fish biodiesel and a 20% biodiesel/diesel blend by naturally present microbial communities in laboratory microcosms under favorable environmental conditions. Visible fungal remediation was observed with Syntroleum and fish biodiesel contaminated samples, which also showed the highest total hydrocarbon mineralization (>48%) during the first 28 days of the experiment. Heating diesel and conventional diesel fuels showed the lowest total hydrocarbon mineralization with 18–23% under favorable conditions. In concurrent experiments with growth of fungi suspended on a grid in the air space above a specific fuel with little or no soil, fungi were able to survive and grow solely on volatile hydrocarbon compounds as a carbon source. These setups involved negligible bacterial degradation for all five investigated fuel types. Fungal species able to grow on specific hydrocarbon substrates were identified as belonging to the genera of Giberella, Mortierella, Fusarium, Trichoderma, and Penicillium.

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