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Results 301 - 350 of 1861
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Liu Mingxing - - 2008
The aim of this study is to investigate the effect of poly(D, L-lactic acid) (PLA) nanoparticles as triptolide carrier on abating renal toxicity for Sprague Dawley rats after oral administration. Triptolide has severe toxicities on digestive, urogenital and blood circulatory system. High-resolution 600-MHz 1H-nuclear magnetic resonance (1H-NMR)-based metabolic analysis was ...
Jung Seung Won - - 2008
Lactic acid bacteria (LAB) with antimicrobial activity and high exopolysaccharide (EPS) production ability isolated from sourdough were studied for their fermentation characteristics as potential new starter cultures. The values of pH, titratable acidity, and viable cell counts were 4.06+/-0.009-4.50+/- 0.015, 0.787+/-0.020%-1.172+/-0.018%, and 8.78+/-0.08-8.98+/- 0.06 log CFU/ml, respectively. In order to ...
Patel Manoj - - 2008
A dual-particle liquid-solid circulating fluidized bed (DP-LSCFB) bioreactor has been constructed and investigated for the simultaneous production and extraction of lactic acid using immobilized Lactobacillus bulgaricus and ion-exchange resins. The apparatus consisted of a downer fluidized bed, 13 cm I.D. and 4.75 m tall, and a riser fluidized bed, 3.8 ...
Timbuntam Walaiporn - - 2008
The efficiency of bipolar electrodialysis (BED) for the recovery of lactic acid from fermentation broth was evaluated. Three systems of BED (bipolar-anion, bipolar-cation and bipolar-anion-cation) at fixed voltage (20 V) were compared using a model solution of ammonium lactate (100 g l(-1)). Results showed that bipolar-anion (BED-anion) was the most ...
Shen Jian - - 2008
6-Oligo(lactic acid)cyclomaltoheptaose (6-OLA-betaCD) with an average substitution of about 7.0 lactic acid units was prepared as a new water-soluble cyclomaltoheptaose (betaCD) derivative (solubility of about 70.7-fold that of betaCD), based on the ring-opening polymerization of 3,6-dimethyl-1,4-dioxane-2,5-dione (lactide). The product was characterized by (1)H NMR, (13)C NMR, IR, and MS spectroscopy. ...
Cobo Molinos Antonio - - 2008
Enterocin AS-48 was tested for decontamination of soybean sprouts against Gram-negative bacteria. Although treatment with bacteriocin alone had no effect on Salmonella enterica, a synergistic antimicrobial effect was detected at pH 9.0 and in combination with moderate heat treatment. Greatest inactivation was achieved for sprouts heated for 5 min at ...
Dogan Alev Aksoy - - 2008
To evaluate the efficacy of common antiseptic mouth rinses and octenidine dihydrochloride (OCT). The antibacterial activities of antiseptics against total and cariogenic bacteria (Streptococcus mutans and Lactobacillus species) in saliva were studied in vitro and in vivo. After unstimulated saliva was collected, one of the mouth rinse solutions was applied ...
Turgis M - - 2008
Selected Chinese cinnamon, Spanish oregano, and mustard essential oils (EOs) were used in combination with irradiation to evaluate their ability to eliminate pathogenic bacteria and extend the shelf life of medium-fat-content ground beef (23% fat). Shelf life was defined as the time when the total bacterial count reached 10(7) CFU/g. ...
Shime Hiroaki - - 2008
IL-23 is a proinflammatory cytokine consisting of a p19 subunit and a p40 subunit that is shared with IL-12. IL-23 is overexpressed in and around tumor tissues, where it induces local inflammation and promotes tumor development. Many tumor cells produce large amounts of lactic acid by altering their glucose metabolism. ...
Leisner Jørgen J - - 2008
Chitin is a polysaccharide widely distributed in nature. Among 115 strains from 29 species of lactic acid bacteria only strains belonging to Carnobacterium divergens and Carnobacterium maltaromaticum hydrolyzed alpha-chitin. This activity was not affected by temperature (10 degrees C versus 30 degrees C) and in most cases not subject to ...
Moreno-Arribas M Victoria - - 2008
Biologically aged sherry-type wines are elaborated by the so-called 'criadera and solera' system, which essentially involves development of the yeast on the wine surface forming a film velum for several years. Lactic acid bacteria can also develop and contribute to sherry-type wine quality, although their presence and role in this ...
Streit F - - 2008
AIMS: This work aimed at clarifying the physiological responses of Lactobacillus delbrueckii subsp. bulgaricus CFL1 cells after exposure to acidification at the end of fermentation, in relation to their cryotolerance. METHODS AND RESULTS: Cells acidified at the end of the fermentation (pH 5.25 for 30 min) had their cryotolerance improved ...
John Rojan P - - 2008
Current study was focused on the development of a non-fastidious lactic acid producing strain having better growth rate, low pH tolerance and good productivity by genome shuffling of a mutant strain of Lactobacillus delbrueckii NCIM 2025 and an amylase producing non-fastidious Bacillus amyloliquefaciens ATCC 23842. After the third cycle of ...
Cobo Molinos Antonio - - 2008
Enterocin AS-48 is a broad-spectrum cyclic antimicrobial peptide produced by Enterococcus faecalis. In the present study, the bacteriocin was tested alone and in combination with other antimicrobials for decontamination of Bacillus inoculated on alfalfa, soybean sprouts and green asparagus. Washing with enterocin AS-48 solutions reduced viable cell counts of Bacillus ...
Cheng Jiongjia - - 2008
The promotion effect of titania nanoparticles (nano-TiO(2)) on the direct electron transfer between lactate dehydrogenase (LDH) and the silica sol-gel modified gold electrode was investigated by adding nano-TiO(2) (50 nm) in the modification process. This nano-TiO(2)-LDH electrode showed a pair of quasi-reversible cyclic voltammetry peaks with the formal potential of ...
Paik Man-Jeong - - 2008
Simultaneous determination of lactic acid, pyruvic acid, 3-hydroxybutyric acid and acetoacetic acid for clinical monitoring of lactic acidosis and ketone body formation in human plasma (20 microL) was performed by gas chromatography-mass spectrometry in selected ion monitoring (SIM) mode after generating methoxime/tert-butyldimethylsilyl derivatives. All of the targeted carboxylic acids were ...
Aso Yuji - - 2008
Bacteriocin-producing lactic acid bacteria (LAB) are believed to be associated with many types of fermented food. The present study reports the identification of lactic acid bacterium MS27 producing a bacteriocin isolated from the Tsuda-turnip pickle, which is a Japanese fermented food, and characterization of LAB coexisting with the bacteriocin producers ...
Rangaswamy V - - 2008
AIMS: An integrated dual reactor system for continuous production of lactic acid by Lactobacillus delbrueckii using biofilms developed on reticulated polyurethane foam (PUF) is demonstrated. METHODS AND RESULTS: Lactobacillus delbrueckii was immobilized on PUF, packed in a bioreactor and used in lactic acid fermentation. The rate of lactic acid production ...
Hossain Md Monwar - - 2008
Lactic acid has extensive uses in the food, pharmaceutical, cosmetic and chemical industry. Lately, its use in producing biodegradable polymeric materials (polylactate) makes the production of lactic acid from fermentation broths very important. The major part of the production cost accounts for the cost of separation from very dilute reaction ...
Zhang Jian-Guo - - 2008
In order to increase the yield of S-adenosylmethionine (SAM) in recombinant Pichia pastoris, a strategy of adding oxygen vectors and supplemental carbon sources was described. Three organic solutions were used as oxygen vectors for SAM accumulation at different concentrations and addition times. Firstly, n-hexane (0.5%) or n-heptane (1.0%) was added ...
Ong L - - 2008
The influence of adjunct bacteria on composition of cheeses, organic acid profiles, proteolysis, and ACE-inhibitory activity during ripening at 4, 8, and 12 degrees C for 24 wk was investigated. cheddar cheeses were made with starter lactococci (control), Lactobacillus acidophilus L10, and starter lactococci (L10), and L. acidophilus L10, L. ...
Roy Karine - - 2008
Lactic acid bacteria are used on an industrial scale for the manufacturing of dairy products. It is now intended to develop novel applications of lactic acid bacteria that could be used as living vehicles for the targeting of antigens or therapeutics to the digestive mucosa. The aim of this study ...
Mirlohi M - - 2008
Regarding the importance of the presence of intestinal lactobacilli and their population in infants, four different treatments were evaluated for Lactobacillus isolation efficiency via reduction in the growth of other groups of bacteria capable of growing on de-Man Rogosa Sharpe (MRS) medium from fecal samples of 11 Iranian infants. MRS-Vancomycin ...
Ekinci F Y - - 2008
Propionibacteria are able to produce a wide variety of food components beneficial to human health. In this study, yogurt was produced by using the adjunct starter cultures Propionibacterium jensenii B1264 and Propionibacterium thoenii (jensenii) P126. Although the total solids and protein contents of the yogurts did not show any significant ...
Gailunas K M - - 2008
Ready-to-eat meat products have been implicated in several foodborne listeriosis outbreaks. Microbial contamination of these products can occur after thermal processing when products are chilled in salt brines. The objective of this study was to evaluate UV radiation on the inactivation of Listeria monocytogenes and lactic acid bacteria in a ...
Kouya Tomoaki - - 2008
Production of a bifidogenic growth stimulator (BGS) by Propionibacterium freudenreichii subsp. shermanii (Propionibacterium shermanii) using lactic acid as a carbon source was investigated using different cultivation methods. When a continuous bioreactor system with a filtration device was used at a dilution rate of 0.075 h(-1), the average BGS concentration was ...
Gladden L Bruce - - 2008
The cell-to-cell lactate shuttle was introduced in 1984 and has been repeatedly supported by studies using a variety of experimental approaches. Because of its large mass and metabolic capacity, skeletal muscle is probably the major component of the lactate shuttle in terms of both production and consumption. Muscles exercising in ...
Garofalo C - - 2008
AIMS: To study lactic acid bacteria (LAB) and yeast dynamics during the production processes of sweet-leavened goods manufactured with type I sourdoughs. METHODS AND RESULTS: Fourteen sourdough and dough samples were taken from a baking company in central Italy during the production lines of three varieties of Panettone. The samples ...
Maas Ronald H W - - 2008
The fungus Rhizopus oryzae converts both glucose and xylose under aerobic conditions into chirally pure L+-lactic acid with by-products such as xylitol, glycerol, ethanol, carbon dioxide and fungal biomass. In this paper, we demonstrate that the production of lactic acid by R. oryzae CBS 112.07 only occurs under growing conditions. ...
Maas Ronald H W - - 2008
Conventional processes for lignocellulose-to-organic acid conversion requires pretreatment, enzymatic hydrolysis, and microbial fermentation. In this study, lime-treated wheat straw was hydrolyzed and fermented simultaneously to lactic acid by an enzyme preparation and Bacillus coagulans DSM 2314. Decrease in pH because of lactic acid formation was partially adjusted by automatic addition ...
Li Yong-Sheng - - 2008
A new method for the determination of lactic acid based on the immobilization enzyme fluorescence capillary analysis (IE-FCA) was proposed. Lactic dehydrogenase (LDH) was immobilized on inner surface of a capillary with glutaraldehyde, and an immobilized enzyme lactate capillary bioreactor (IE-LCBR) was formed for the determination of lactic acid. After ...
Pescuma Micaela - - 2008
Whey, a by-product of the cheese industry usually disposed as waste, is a source of biological and functional valuable proteins. The aim of this work was to evaluate the potentiality of three lactic acid bacteria strains to design a starter culture for developing functional whey-based drinks. Fermentations were performed at ...
Arena M E - - 2008
AIMS: To elucidate and characterize the metabolic putrescine synthesis pathway from agmatine by Lactobacillus hilgardii X(1)B. METHODS AND RESULTS: The putrescine formation from agmatine by resting cells (the normal physiological state in wine) of lactic acid bacteria isolated from wine has been determined for the first time. Agmatine deiminase and ...
Zhang Zhan Ying - - 2008
Cultivations of filamentous fungi in stirred tank reactors (STRs) to produce metabolites are often limited by insufficient mixing and mass transfer because of the formation of mycelial clumps inside the reactors. This study developed an acid-adapted preculture approach to control the morphology of filamentous Rhizopus arrhizus in a STR, consequently ...
Hidalgo Alyssa - - 2008
The aim of this research was to study uracil and lactic and acetic acids as chemical markers for hygienic quality evaluation of raw material in liquid pasteurized egg products. Uracil, absent in sound whole eggs, was formed in raw and pasteurized egg products as a consequence of high microbial contamination ...
Yu Lei - - 2008
Genome shuffling is a powerful strategy for rapid engineering of microbial strains for desirable industrial phenotypes. Here we applied the genome shuffling to improve the glucose tolerance of Lactobacillus rhamnosus ATCC 11443 while simultaneously enhancing the L-lactic acid production. The starting population was generated by ultraviolet irradiation and nitrosoguanidine mutagenesis ...
Morishima Tetsuro - - 2008
The water channel protein aquaporin (AQP) may play roles in the homeostasis of water content in the brain and brain edema. One possible mechanism of brain edema is glial swelling due to lactic acidosis associated with ischemia. Here, we investigated the effect of lactic acid on the expression and cellular ...
Vázquez J A - - 2008
The reparameterization of two classic growth models (the logistic and Gompertz equations), and the dynamic modification of the integrated form of the first of these, was applied to the description of the kinetics and metabolic behaviour of six strains of lactic acid bacteria in four media: three of these from ...
Sauer Michael - - 2008
Microbial production of organic acids is a promising approach for obtaining building-block chemicals from renewable carbon sources. Although some acids have been produced for some time and in-depth knowledge of these microbial production processes has been gained, further microbial production processes seem to be feasible, but large-scale production has not ...
Okino Shohei - - 2008
In mineral salts medium under oxygen deprivation, Corynebacterium glutamicum exhibits high productivity of L-lactic acid accompanied with succinic and acetic acids. In taking advantage of this elevated productivity, C. glutamicum was genetically modified to produce D-lactic acid. The modification involved expression of fermentative D-lactate dehydrogenase (D-LDH)-encoding genes from Escherichia coli ...
Valerio Francesca - - 2008
Four fermentation products (FPs) of the lactic acid bacterium Lactobacillus plantarum ITM21B were screened for their anti-Bacillus activity in vitro and in bread-making trials. Results of the storage tests performed with loaves prepared with an FP or calcium propionate demonstrated that after 3 days at 30 degrees C, gross spoilage ...
Matsumoto Tsukasa - - 2008
Gastric mucosal cell-derived L-lactic acid strongly enhances proliferation of Helicobacter pylori, and may contribute to the long-term colonization of H. pylori in the stomach. Therefore it is assumed that inhibitory substances active against L-lactic acid-dependent growth of H. pylori will be useful candidates as novel therapeutic agents for H. pylori ...
Mendoza-Espinosa L G - - 2008
The effect of the use of treated wastewater on the growth of cabernet sauvignon and merlot grapes from the Guadalupe Valley, Mexico was evaluated. Secondary advanced effluent was used to irrigate the grapevines at a rate of 66 L/vine/week. Wastewater quality results confirmed that all parameters complied with Mexican legislation ...
Selwet M - - 2008
The objective of this study was to determine the influence of biological silage additive (Bonsilage) on the hygiene quality and nutritive value of maize and grass-legume silages. The experiments were conducted on FAO 240 maize (Zea mays L.) and a mixture of italian ryegrass (Lolium multiflorum L.), 50% with alfalfa ...
Drochioiu Gabi - - 2008
Cachexia is a pathological state characterized by weight loss and protein mobilization during various diseases. Nutritional supplementation or appetite stimulants are unable to restore the loss of lean body mass. Agents interfering with TNF-alpha have not been very successful to date. Only eicosapentaenoic acid was able to interfere with the ...
Ray Ramesh C - - 2008
There is serious concern about the disposal of solid residues left after large scale extraction of starch from cassava. Owing to the high starch content (55-65% on dry weight basis) and organic matter of these wastes, an attempt has been made to utilize it for the production of three bioproducts, ...
Brighenti F L - - 2008
Plants naturally produce secondary metabolites that can be used as antimicrobials. The aim of this study was to assess the effects of Psidium cattleianum leaf extract on Streptococcus mutans. The extract (100%) was obtained by decoction of 100 g of leaves in 600 ml of deionized water. To assess killing, ...
Selwet M - - 2008
The aim of these studies was to assess the effect of chemical conservants (FA = formic acid, PA = propionic acid, FPA+i = formic acid, propionic acid and ammonium ions) on the cell counts of yeasts and mould fungi in silage. The silage was prepared from corn (Zea mays L), ...
Bai Dong-Mei - - 2008
Corncob is an economic feedstock and more than 20 million tons of corncobs are produced annually in China. Abundant xylose can be potentially converted from the large amount of hemicellulosic materials in corncobs, which makes the crop residue an attractive alternative substrate for a value-added production of a variety of ...
Takahashi N - - 2008
In this essay we propose an extension of the caries ecological hypothesis to explain the relation between dynamic changes in the phenotypic/genotypic properties of plaque bacteria and the demineralization/remineralization balance of the caries process. Dental plaque represents a microbial ecosystem in which non-mutans bacteria (mainly non-mutans streptococci and Actinomyces) are ...
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