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Results 451 - 500 of 2335
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Whitaker W Brian - - 2010
Vibrio parahaemolyticus inhabits marine, brackish, and estuarine waters worldwide, where fluctuations in salinity pose a constant challenge to the osmotic stress response of the organism. Vibrio parahaemolyticus is a moderate halophile, having an absolute requirement for salt for survival, and is capable of growth at 1 to 9% NaCl. It ...
Marrero Joeli - - 2010
Metabolic adaptation to the host niche is a defining feature of the pathogenicity of Mycobacterium tuberculosis (Mtb). In vitro, Mtb is able to grow on a variety of carbon sources, but mounting evidence has implicated fatty acids as the major source of carbon and energy for Mtb during infection. When ...
Olsen Arne M - - 2010
Liposarcomas (LS) are mesenchymal tumors that can recur after surgical resection and often do not respond to presently available medical therapies. This study demonstrates the dependence of LS on de novo long-chain fatty acid synthesis for growth. Lipogenesis can be impaired by inhibiting the activities of lipogenic enzymes, including acetyl ...
Pope Francis D - - 2010
We describe a newly constructed electrodynamic balance with which to measure the relative mass of single aerosol particles at varying relative humidity. Measurements of changing mass with respect to the relative humidity allow mass (m) growth factors (m(aqueous)/m(dry)) and diameter (d) growth factors (d(aqueous)/d(dry)) of the aerosol to be determined. ...
Ma Xi - - 2010
The purpose of this study was to evaluate the attenuation effects of consuming a small dose of lipoic acid on soybean glycinin-induced hypersensitivity using a rat model. Sensitized by gavage with glycinin, weaned rats were orally supplemented with the diet containing 12.5 mug of lipoic acid/g (per diet). Results showed ...
Hintze Paul E - - 2010
Dipicolinic acid (pyridine-2,6-carboxylic acid; DPA) is a major component of bacterial spores and has been shown to be an important determinant of spore resistance. In the core of dormant Bacillus subtilis spores, DPA is associated with divalent calcium in a 1:1 chelate (Ca-DPA). Spores excrete Ca-DPA during germination, but it ...
Ojha Anil K - - 2010
Mycobacterial species, like other microbes, spontaneously form multicellular drug-tolerant biofilms when grown in vitro in detergent-free liquid media. The structure of Mycobacterium tuberculosis biofilms is formed through genetically programmed pathways and is built upon a large abundance of novel extracellular free mycolic acids (FM), although the mechanism of FM synthesis ...
Lata Hemant - - 2010
An efficient in vitro propagation protocol for rapidly producing Cannabis sativa plantlets from young leaf tissue was developed. Using gas chromatography-flame ionization detection (GC-FID), high THC yielding elite female clone of a drug-type CANNABIS variety (MX) was screened and its vegetatively propagated clones were used for micropropagation. Calli were induced ...
Sahoo Prafulla Kumar - - 2010
Assessment of microbial parameters, viz. microbial biomass, fluorescence diacetate, microbial respiration, acid phosphatase, beta-glucosidase and urease with respect to acidity helps in evaluating the quality of soils. This study was conducted to investigate the effects of different forms of acidities on soil microbial parameters in an acid mine drainage contaminated ...
Lee Kibeom - - 2010
Lactobacillus salivarius, a probiotic bacterium, encounters acidic conditions in its passage through the gastrointestinal tract of human and animal hosts. We studied the effect of a rapid downshift in extracellular pH from 6.5 to 4 on cell growth. The maximum growth rate was higher in low pH medium with glutathione ...
Backor Martin - - 2010
The phytotoxic effects of the lichen secondary metabolite-usnic acid on cultures of free living alga-Scenedesmus quadricauda (UTEX 76) and aposymbiotically grown lichen photobiont Trebouxia erici (UTEX 911) were assessed. We found a relatively strong inhibition effect of usnic acid on the growth of alga Scenedesmus, accompanied by an increase of ...
Gnanamani Arumugam - - 2010
The present study demonstrates in situ formation of multilamellar stable vesicles (MLSVs) of fatty acids released during the growth of microorganisms in the presence of triglycerides. Release of lipase during initial phase of growth hydrolyzes the triglycerides and release free fatty acids (mono or diglycerides) and glycerol. By extending the ...
Wiltafsky Markus Karl - - 2010
The impact of excess dietary leucine (Leu) was studied in two growth assays with pigs (8-25 kg). In each trial, forty-eight pigs were allotted to one of six dietary groups. The dietary Leu supply increased from treatment L100 to L200 (three increments). To guarantee that interactions between the branched-chain amino ...
Luo J - - 2010
The effects of the probiotic, Propionibacterium jensenii 702 (PJ 702), supplementation on egg productivity, egg shell thickness, fatty acid profile of eggs, and body weight in early layer hens were investigated. Twenty eight twenty-week-old starter pullets were evenly divided into a treatment and a control group for an eight week ...
Dai Yumei - - 2010
The growth of four spoilage yeasts, Saccharomyces cerevisiae, Zygosaccharomyces bailii, Brettanomyces bruxellensis, and Brettanomyces naardenensis, was inhibited with three-agent (triplet) combinations of lauric arginate, cinnamic acid, and sodium benzoate or potassium sorbate. The inhibition efficacy was determined by monitoring the optical density of yeast cultures grown in microtiter plates for ...
Boguhn J - - 2010
The effects of a nonstarch polysaccharide-hydrolyzing enzyme product on growth, feed conversion, ME, and digestibility of crude nutrients and amino acids were investigated in a 22-wk trial using male turkeys. Diets were mainly based on wheat, barley, and rye, and the experiment comprised 6 phases. The enzyme product contained endoxylanase ...
DellaGreca Marina - - 2010
The role of extracellular fatty acids in the interference between two algae, Chlorella vulgaris Beijerink and Pseudokirchneriella subcapitata (Korshikov) Hindak, was assessed by the co-cultivation of the two selected strains, as well as by the chemical analysis of exudates from the culture media of single strain cultures. The effect of ...
Ye Liu - - 2010
Nitrite/Free Nitrous Acid (FNA) has previously been shown to inhibit aerobic and anoxic phosphate uptake by polyphosphate accumulating organisms (PAOs). The inhibitory effect of FNA on the aerobic metabolism of Glycogen Accumulating Organisms (GAOs) is investigated. A culture highly enriched (92+/-3%) in Candidatus Competibacter phosphatis (hereafter called Competibacter) was used. ...
Sfaxi-Bousbih Amira - - 2010
The germination rate, mineral (Ca, Fe, K, Mn) and carbohydrate (starch, soluble sugars, sucrose, glucose, fructose) contents and hydrolase activities in cotyledons and embryonic axes of bean seeds subjected to cadmium stress were investigated. Compared to the control, Cd caused a reduction in germination percent, embryo growth and in distribution ...
D'Alvise Paul W - - 2010
The purpose of the present study was to investigate the inhibition of Vibrio by Roseobacter in a combined liquid-surface system. Exposure of Vibrio anguillarum to surface-attached roseobacters (10(7) CFU/cm(2)) resulted in significant reduction or complete killing of the pathogen inoculated at 10(2) to 10(4) CFU/ml. The effect was likely associated ...
Ehrhardt Christopher J - - 2010
The goal of this study was to determine if cellular fatty acid methyl ester (FAME) profiling could be used to distinguish among spore samples from a single species (Bacillus cereus T strain) that were prepared on 10 different medium formulations. To analyze profile differences and identify FAME biomarkers diagnostic for ...
Kang Kyung-hee - - 2010
When proteins are damaged under stresses conditions, these proteins are either refolded or degraded by quality control system of molecular chaperones and protease. High-temperature requirement A (htrA) is of particular interest because it can perform the roles of both protease and a chaperone. HtrA plays an important role in maintaining ...
Schirmer Bjørn Christian - - 2010
The aim of this paper was to evaluate the effect of a novel CO(2) packaging method in combination with organic acids on the microbial growth in fresh pork meat. Fresh pork fillet was packed with a small amount of 100% CO(2) (initial gas/product ratio 0.2/1.0) and a brine solution containing ...
Ratphitagsanti Wannasawat - - 2010
Effect of organic acids (acetic, citric, and lactic; 100 mM, pH 5) on spore inactivation by pressure-assisted thermal processing (PATP; 700 MPa and 105 degrees C), high pressure processing (HPP; 700 MPa, 35 degrees C), and thermal processing (TP; 105 degrees C, 0.1 MPa) was investigated. Bacillus amyloliquefaciens spores were ...
Gutarowska Beata - - 2010
This paper presents the effect of building materials on the growth and metabolic activity of moulds. In cultures of Aspergillus and Penicillium moulds grown on a model medium with the addition of building materials, the biomass of mycelium, its cellular components--glucan, chitin, ergosterol and the spectrum of enzymes and organic ...
Tchirikov M - - 2010
Intrauterine growth restriction (IUGR) carries an increased risk of mortality and morbidity. The accepted procedure to treat IUGR fetuses is premature delivery, which may increase neonatal mortality and morbidity and retards neonatal brain development. We report here on intravascular supplementation with amino acids and glucose of an IUGR human fetus ...
Wolcott Abraham - - 2010
In-situ TOPO decomposition was accomplished by applying a vacuum at elevated temperatures to a precursor solution in the presence of oxygen, leading TOPO to oxidize to di-n-octylphosphinic acid (DOPA) and octylphosphonic acid (OPA). The mixed ligand system of tetradecylphosphonic acid (TDPA), DOPA and OPA produced CdSe QRs on the order ...
Wilmes Boris - - 2010
Pseudoalteromonas haloplanktis is a cold-adapted γ-proteobacterium isolated from Antarctic sea ice. It is characterized by remarkably high growth rates at low temperatures. P. haloplanktis is one of the model organisms of cold-adapted bacteria and has been suggested as an alternative host for the soluble overproduction of heterologous proteins which tend ...
Imaz Inhar - - 2009
Long chiral metal-organic nanofibers can be grown using conventional coordination chemistry and biologically derived components in a diffusion controlled growth procedure.
Jiang Min - - 2010
Aerobic growth conditions significantly influenced anaerobic succinate production in two-stage fermentation by Escherichia coli AFP111 with knockouts in rpoS, pflAB, ldhA, and ptsG genes. At a low cell growth rate limited by glucose, enzymes involved in the reductive arm of the tricarboxylic acid cycle and the glyoxylate shunt showed elevated ...
Line J E - - 2010
Campylobacter spp. readily colonize the intestinal tracts of both human and avian species. While most often commensal organisms in birds, campylobacters remain the leading cause of bacterial gastroenteritis in humans. The association of campylobacters with poultry is well established as a primary route for human exposure. The difference in normal ...
Martin Maria Teresa - - 2009
Two independent parameters, epicotyl height (cm) and number of induced buds were studied on Pinus pinaster explants to analyse the effects of three phytohormones (6-benzylaminopurine, jasmonic acid, ethylene) which were combined or not in 11 different treatments. Epicotyle length diminished significantly in relation to the control medium (medium without exogen ...
Ditlecadet D - - 2009
Genetic variation in growth performance was estimated in 26 families from two commercial strains of Arctic charr Salvelinus alpinus. Physiological determinants of growth and metabolic capacities were also assessed through enzymatic assays. A relatedness coefficient was attributed to each family using parental genotypes at seven microsatellite loci. After 15 months ...
Attrapadung Siriluck - - 2010
Free fatty acids exhibit diverse biological effects such as the regulation of immune responses in humans and animals. To investigate the biological effect of fatty acids in the model eukaryotic organism yeast, we examined the activity of various fatty acids in a yeast-based drug-screening system designed to detect the small-molecule ...
Costa Torres Alba Fabiola - - 2010
Some proteins present in snake venom possess enzymatic activities, such as phospholipase A(2) and l-amino acid oxidase. In this study, we verify the action of the Bothrops marajoensis venom (BmarTV), PLA(2) (BmarPLA(2)) and LAAO (BmarLAAO) on strains of bacteria, yeast, and Leishmania sp. The BmarTV was isolated by Protein Pack ...
Wang Liang - - 2010
The present study was to investigate the effectiveness of using digested dairy manure as a nutrient supplement for cultivation of oil-rich green microalgae Chlorella sp. Different dilution multiples of 10, 15, 20, and 25 were applied to the digested manure and algal growth was compared in regard to growth rate, ...
Schmidt Lilian - - 2010
Jasmonic acid (JA) is a crucial plant defence signalling substance that has recently been shown to mediate herbivory-induced root growth reduction in the ecological model species Nicotiana attenuata. To clarify whether JA-induced reduction of root growth might be a general response increasing plant fitness under biotic stress, a suite of ...
Lee Pyung Cheon - - 2009
Succinic acid-producing Anaerobiospirillum succiniciproducens was anaerobically grown in glucose-fed continuous cultures using glucose as a carbon source, and the metabolic flexibility of A. succiniciproducens in response to varying glucose concentrations and dilution rates was examined. Both succinic acid (SA) and acetic acid (AA) formation was growth-associated, and their growth-rate-related coefficients ...
Eschen-Lippold Lennart - - 2009
Infections with Phytophthora infestans, the causal agent of potato and tomato late blight disease, are difficult to control and can lead to considerable agricultural losses. Thus, the development of new effective agents against the pathogen is of great interest. In previous work, (E)-4-oxohexadec-2-enoic acid (3) was isolated from Hygrophorus eburneus, ...
Zhang Renyi - - 2009
The molecular processes leading to formation of nanoparticles of blue haze over forested areas are highly complex and not fully understood. We show that the interaction between biogenic organic acids and sulfuric acid enhances nucleation and initial growth of those nanoparticles. With one cis-pinonic acid and three to five sulfuric ...
Mejlholm Ole - - 2009
An existing cardinal parameter growth and growth boundary model for Listeria monocytogenes (O. Mejlholm and P. Dalgaard, J. Food Prot. 70:70-84 and 2485-2497, 2007) was expanded with terms for the effects of acetic, benzoic, citric, and sorbic acids to include a total of 12 environmental parameters and their interactive effects. ...
Lloyd T - - 2009
The growth of Listeria monocytogenes in further-processed meat products has become a major concern and an important food safety issue. The meat and poultry industries have incorporated interventions such as organic acids in marinades to inhibit the growth of L. monocytogenes. In this study, organic acids were utilized in the ...
Kim Sang-Chul - - 2009
Fatty acid amide hydrolase (FAAH) terminates the endocannabinoid signaling pathway that regulates numerous neurobehavioral processes in animals by hydrolyzing N-acylethanolamines (NAEs). Recently, an Arabidopsis FAAH homologue (AtFAAH) was identified, and several studies, especially those using AtFAAH overexpressing and knock-out lines, have suggested an in vivo role for FAAH in the ...
Corona-Gonzalez Rosa Isela - - 2010
Glucose fermentation with Actinobacillus succinogenes was carried out at different initial concentrations of succinic acid (SA(0)) to determine its effect on growth and on the production of succinic acid itself. The specific rates of biomass production, succinic, formic and acetic acids decreased with SA(0) (0-40 g/l). The partially dissociated form ...
Bialonska Dobroslawa - - 2009
The consumption of pomegranate products leads to a significant accumulation of ellagitannins in the large intestines, where they interact with complex gut microflora. This study investigated the effect of pomegranate tannin constituents on the growth of various species of human gut bacteria. Our results showed that pomegranate byproducts and punicalagins ...
Pahl Stephen L - - 2010
To investigate the nutritional value of the diatom Cyclotella cryptica (Reimann, Lewin, and Guillard) as an alternative feed for use in the aquaculture industry, the heterotrophic growth characteristics and resultant fatty acid profile of the microalga were studied when cultivated under a variety of controlled salinity and temperature conditions. In ...
Kim Beom Soo - - 2010
Bacillus megaterium ALA2 NRRL B-21660 has been well studied for the production of many oxygenated unsaturated fatty acids from linoleic acid. Its major product, 12,13,17-trihydroxy-9(Z)-octadecenoic acid (12,13,17-THOA), inhibited the growth of many plant pathogenic fungi. However, we have been unable, until now, to demonstrate 12,13,17-THOA production in a fermentor. Here, ...
Sfaxi-Bousbih Amira - - 2010
The influence of copper excess on germination rate, growth, minerals, carbohydrates, and amino acids supply in embryonic axis of bean seed was investigated. Compared to the control, Cu treatment caused a reduction in germination percent, embryo length, and accumulation of Ca, Fe, K, Mn, Zn, total soluble sugars, glucose, fructose, ...
Kavitha V - - 2010
The present study demonstrates biopolymer production by in situ bio-based dimerization of fatty acids by microorganism isolated from marine sediments. Microbial isolate grown in Zobell medium in the presence of triglycerides for the period of 24-240 h at 37 degrees C, hydrolyze the applied triglycerides and sequentially dimerized the hydrolyzed ...
Sakuma Satoru - - 2009
Epidemiologic investigations indicate a close relationship between colorectal cancer and fat intake. However, to date the effects of lipid peroxidation-derived products that are formed from fat (especially free or esterified unsaturated fatty acids) on the initiation or progression of colorectal cancer have not been investigated extensively. Therefore, in the present ...
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