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Results 251 - 300 of 2318
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Garde Sonia - - 2011
In the manufacture of model cheeses, ovine milk was deliberately contaminated with spores of Clostridium beijerinckii INIA 63, a wild isolate from Manchego cheese with late blowing defect, and inoculated with nisin- and lacticin 481-producing Lactococcus lactis subsp. lactis INIA 415 as starter, to test its potential to prevent the ...
Kashiwakura Shunsuke - - 2011
Coal fly ash emitted from coal-fired electric power stations generally contains environmentally regulated trace elements. In particular, boron, arsenic, and selenium have been recognized as troublesome trace elements because elutions from the fly ash contain them. In order to design an effective removal process for these trace elements, we have ...
Salgado José Manuel - - 2011
This study develops a system for the efficient valorisation of hemicellulosic hydrolysates of vineshoot trimmings. By connecting two reactors of 2L and 10L, operational conditions were set up for the sequential production of lactic acid and xylitol in continuous fermentation, considering the dependence of the main metabolites and fermentation parameters ...
Zhu J Y - - 2011
Native aspen (Populus tremuloides) was pretreated using sulfuric acid and sodium bisulfite (SPORL) and dilute sulfuric acid alone (DA). Simultaneous enzymatic saccharification and fermentation (SSF) was conducted at 18% solids using commercial enzymes with cellulase loadings ranging from 6 to 15FPU/g glucan and Saccharomyces cerevisiae Y5. Compared with DA pretreatment, ...
Kheng Tee Yei - - 2011
BACKGROUND: A series of physico-chemical quality (peel and pulp colours, pulp firmness, fruit pH, sugars and acids content, respiration rate and ethylene production) were conducted to study the optimum harvest periods (either week 11 or week 12 after emergence of the first hand) of Rastali banana (Musa AAB Rastali) based ...
de Beer Dalene - - 2011
BACKGROUND: The effects of citric and ascorbic acids on the stability of aspalathin in rooibos (Aspalathus linearis) ready-to-drink (RTD) formulations containing fermented rooibos extract (FR), aspalathin-enriched green rooibos extract (GR) and aspalathin-enriched green rooibos extract ascorbic acid solubilisate (GR-solubilisate) were investigated during storage (12 weeks at 25 °C). RESULTS: Storage ...
Baig M N - - 2011
Supercritical fluids offer environmental advantages over chemical solvents, while providing enhanced separation and chemical selectivity. The use of supercritical fluids for the recovery of products from biomass and the transformation of selected molecules (to add value) was studied. Free fatty acids were bio-catalytically transformed to fatty acid esters using lipase ...
Zhao Xuebing - - 2011
The enzymatic digestibility of alkali/peracetic acid (PAA)-pretreated bagasse was systematically investigated. The effects of initial solid consistency, cellulase loading and addition of supplemental β-glucosidase on the enzymatic conversion of glycan were studied. It was found the alkali-PAA pulp showed excellent enzymatic digestibility. The enzymatic glycan conversion could reach about 80% ...
Zhang Bo - - 2011
The use of aquatic plant cattails to produce biofuel will add value to land and reduce emissions of greenhouse gases by replacing petroleum products. Dilute-sulfuric acid pretreatment of cattails was studied using a Dionex accelerated solvent extractor (ASE) varying acid concentration (0.1-1%), treatment temperature (140-180°C), and residence time (5-10min). The ...
Orozco Angela M - - 2011
The visibility of using municipal bio-waste, wood shavings, as a potential feedstock for ethanol production was investigated. Dilute acid hydrolysis of wood shavings with H(3)PO(4) was undertaken in autoclave parr reactor. A combined severity factor (CSF) was used to integrate the effects of hydrolysis times, temperature and acid concentration into ...
Fuentes-Grünewald C - - 2011
Two different strains of microalgae, one raphidophyte and one dinoflagellate, were tested under different abiotic conditions with the goal of enhancing lipid production. Whereas aeration was crucial for biomass production, nitrogen deficiency and temperature were found to be the main abiotic parameters inducing the high-level cellular accumulation of neutral lipids. ...
Valle-Rodríguez Juan Octavio - - 2011
This study aimed to improve the fermentation efficiency of Kloeckera africana K1, in tequila fermentations. We investigated organic and inorganic nitrogen source requirements in continuous K. africana fermentations fed with Agave tequilana juice. The addition of a mixture of 20 amino-acids greatly improved the fermentation efficiency of this yeast, increasing ...
Li Zhaosheng - - 2011
High production cost is a major obstacle to the extensive use of microalgae biodiesel. To cut the cost and achieve higher biomass productivity, Chlorella minutissima UTEX2341 was cultured under photoheterotrophic conditions. With the carbon, nitrogen and phosphorus concentration of 26.37, 2.61 and 0.03gL(-1)d(-1) respectively, a maximum biomass productivity of 1.78gL(-1)d(-1) ...
Devesa-Rey R - - 2011
Wine production generates huge amounts of waste. Before the 1990s, the most economical option for waste removal was the payment of a disposal fee usually being of around 3000 Euros. However, in recent years the disposal fee and fines for unauthorized discharges have increased considerably, often reaching 30,000-40,000 Euros, and ...
Burseg Kerstin Martha Mensien - - 2011
Upon stimulation with continuously alternating (pulsatile) taste concentrations, humans report higher average taste intensities than for continuous stimulation with the same average tastant concentration. We investigated the effect of the magnitude of concentration changes (concentration contrast) and the effect of taste quality changes (quality contrast) between alternating tastants on sweet ...
Sun Jingfeng - - 2011
The effect of phosphatidylcholine on the molecular weight properties of hyaluronic acid (HA) was studied in batch culture of Streptococcus zooepidemicus by adding phosphatidylcholine at the early stage of exponential phase. With the addition of 80 mg/L of phosphatidylcholine, maximum HA yield (2.47 g/L) and weight-average molecular weight (902.60 KDa) were achieved, ...
Zhang Dong-Hao - - 2011
Thermomyces lanuginosus lipase (Lipozyme TLIM)-catalyzed esterification of L: -ascorbic acid was studied. It was suggested that Lipozyme TLIM was a suitable biocatalyst for enzymatic esterification of L: -ascorbic acid. Three solvents were investigated for the reaction, and acetone was found to be a suitable reaction medium. Furthermore, it was found ...
Lorenzo José M - - 2011
The changes in the physico-chemical, microbiological, textural and sensory attributes of foal salchichón were followed during ripening. Foal salchichón samples were taken at 0days (mix before stuffing), and after 7, 14, 21, 28, 35, 42 and 49days of ripening. The final a(w) was 0.82, whereas pH values stayed around their ...
Jeong Tae Su - - 2011
Operational conditions for the hydrolysis of rape straw were optimized using the combined severity index (CS), which combines the effects of time, temperature, and acid concentration into a single parameter. The sugar recovery yield was 77.8% of the theoretical yield at a value of CS=1.3. A maximum concentration of xylose ...
Secchi Nicola - - 2011
Scotta is the main by-product in the making of ricotta cheese. It is widely produced in southern Europe and particularly in Italy where it represents a serious environmental pollutant due to its high lactose content. With the aim of evaluating whether scotta bioconversion into lactic acid can be considered as ...
Liu Bo - - 2011
A series of acid-base bifunctional catalysts were prepared, and high yields and excellent selectivity in the aldol condensation were achieved through adjustment of the matching between the acid and the base. The results indicated that proper matching between the acid and the base can both efficiently activate the substrate through ...
Han Hye Min - - 2011
BACKGROUND: The effects of different phenolic acids on the rheological properties and gluten proteins of hard wheat flour dough and bread were investigated. Caffeic, ferulic, syringic and gallic acids were each blended with hard wheat flour at a concentration of 4.44 µmol L(-1) g(-1) flour. RESULTS: Mixing time and tolerance ...
Lasprilla Astrid J R - - 2011
Bioabsorbable polymers are considered a suitable alternative to the improvement and development of numerous applications in medicine. Poly-lactic acid (PLA,) is one of the most promising biopolymers due to the fact that the monomers may produced from non toxic renewable feedstock as well as is naturally occurring organic acid. Lactic ...
Hilten R - - 2011
Catalytic pyrolysis was used to generate gasoline-compatible fuel from peanut oil soap stock (PSS), a high free fatty acid feedstock, using a fixed-bed reactor at temperatures between 450 and 550°C with a zeolite catalyst (HZSM-5). PSS fed at 81gh(-1) along with 100mLmin(-1) inert gas was passed across a 15g catalyst ...
Schultz-Jensen Nadja - - 2011
The potential of wheat straw for ethanol production after pretreatment with O(3) generated in a plasma at atmospheric pressure and room temperature followed by fermentation was investigated. We found that cellulose and hemicellulose remained unaltered after ozonisation and a subsequent washing step, while lignin was degraded up to 95% by ...
Chockalingam Annapoorani - - 2011
Nucleic acid structures are highly conserved through evolution and when self nucleic acids are aberrantly detected by toll-like receptors (TLRs) they contribute to autoimmune disease. For this reason, multiple regulatory mechanisms exist to prevent immune responses to self nucleic acids. TLR9 is a nucleic acid-sensing TLR that is regulated at ...
Schiffels Johannes - - 2011
Short-chain fatty acids are crucial intermediates in the conversion of biomass to methane. Due to the complexity of raw biomass, volatile fatty acids (including n- and branched-chain compounds) as well as arylacetic and arylpropionic acids arise from digestion of carbohydrates, proteins and lipids. The development of a simple extraction procedure ...
Vincent Micky - - 2011
Enzymatic saccharification of corn stover using Phanerochaete chrysosporium and Gloeophyllum trabeum and subsequent fermentation of the saccharification products to ethanol by Saccharomyces cerevisiae and Escherichia coli K011 were achieved. Prior to simultaneous saccharification and fermentation (SSF) for ethanol production, solid-state fermentation was performed for four days on ground corn stover ...
Muhammad Nawshad - - 2011
In the present work, the dissolution of bamboo biomass was tested using a number of ionic liquids synthesized in laboratory. It was observed that one of the synthesized amino acid-based ionic liquids, namely 1-ethyl-3-methylimidazolium glycinate, was capable of dissolving the biomass completely. The dissolved biomass was then regenerated using a ...
Mohammady Nagwa Gamal-ElDin - - 2011
Nannochloropsis salina was cultured batch-wise to evaluate the potential of the alga to produce biodiesel. The cells were harvested at the end of the exponential growth phase when the concentration was 18 x 10(6) cells/mL culture. The growth estimated as dry weight from this cell number was (3.8 +/- 0.7) ...
Buske B - - 2011
The objective of this study was to estimate genetic effects for the muscle hypertrophy mutation (mh) of the myostatin gene for conventional milk production traits and for milk fatty acid composition in dual-purpose Belgian Blue dairy cows. For the present study, only cows from a single herd, in which genotype ...
Davies Hugh - - 2011
The Stockton coal mine lies at 700-1100m above sea level in a mountainous orographic precipitation zone on the West Coast of the South Island of New Zealand. Rainfall exceeds 6000mm/year and arrives with frequent flood events that can deliver >200mm/day. Streams vary in discharges by up to two orders of ...
Nazarenko E L - - 2011
Structure of the O-specific polysaccharide chain of the lipopolysaccharide (LPS) of Shewanella japonica KMM 3601 was elucidated. The initial and O-deacylated LPS as well as a trisaccharide representing the O-deacetylated repeating unit of the O-specific polysaccharide were studied by sugar analysis along with 1H and 13C NMR spectroscopy. The polysaccharide ...
Hesthagen Trygve - - 2011
We studied acid-sensitive organisms in Lake Saudlandsvatn in southernmost Norway in relation to acidification: brown trout (Salmo trutta), the caddisfly Hydropsyche siltalai and the zooplankter Daphnia longispina. The study lake was highly acidified with episodic pH depressions <5.0 in the 1970s and 1980s, and sulphur (S) deposition five times greater ...
Babaee Neda - - 2011
Background: Dry mouth is a common clinical problem, and different products have been proposed to improve it. In this investigation, the effects of "milk curd" on the amount of saliva secretion were studied. Materials and Methods: A total of 32 patients (aged 20-30) were selected from healthy volunteers. Milk curd ...
Onumpai Chatchaya - - 2011
To evaluate the fermentation properties of oligosaccharides derived from pectins and their parent polysaccharides, a 5-ml-working-volume, pH- and temperature-controlled fermentor was tested. Six pectic oligosaccharides representing specific substructures found within pectins were prepared. These consisted of oligogalacturonides (average degrees of polymerization [DP] of 5 and 9), methylated oligogalacturonides (average DP ...
Bigoniya Papiya P Department of Pharmacology, Radharaman College of Pharmacy, Radharaman Group of Institutions, Ratibad, Bhopal, Madhya Pradesh, - - 2011
To compare the anti-ulcer activity of buffered pantoprazole tablet against plain pantoprazole in pyloric ligated rats. In vivo pyloric ligated ulcerogenesis model was used to assess the effect of buffered pantoprazole on the volume of the gastric content, pH, total and free acidity, and ulcerogenic lesion. Pantoprazole level in gastric ...
Fukunishi Shinya - - 2011
p59fyn, a protein tyrosine kinase belonging to the src-family, is involved in the regulatory mechanism of acute response to ethanol in the central nervous system. A previous report showed an association between src-family kinase activity and fatty acid oxidation, and it also reported that hepatic free fatty acid levels were ...
Udomsil Natteewan - - 2011
The potential of <i>Tetragenococcus halophilus</i> as a starter culture for flavor improvement in fish sauce fermentation was elucidated. Four strains of <i>T. halophilus</i> isolated from fish sauce mashes were inoculated to anchovy mixed with 25% NaCl with approximate cell count of 10<sup>6</sup> CFU/ml. α-Amino content of 6-month-old fish sauce samples ...
Stubbings Will - - 2011
Finafloxacin is a novel fluoroquinolone that exhibits enhanced antibacterial activity under acidic conditions. The aim of this study was to define the in vitro pH-activity relationship. Finafloxacin exhibited optimal antibacterial activity between pH 5.0 and 6.0 at which MICs were 4- to 8-fold lower than those determined at neutral pH. ...
Mazák Károly - - 2011
The experimental determination of microscopic partition coefficients for protonation isomers is elaborated for the first time, and applied for niflumic acid, an ampholytic, mainly zwitterionic drug for pains in joints and muscles. The acid-base microequilibria of niflumic acid are also characterized by NMR-pH and deductive methods using auxiliary compounds of ...
Tagaya Motohiro - - 2011
Folic acid (FA) was immobilized on Eu(3+)-doped nanoporous silica spheres (Eu:NPSs) through mediation of the 3-aminopropyltriethoxysilane adlayer. The ordered nanopores of Eu:NPS were preserved by the immobilization. The FA-immobilized Eu:NPSs showed the characteristic photoluminescence peak due to interactions between the FA molecules and Eu(3+) ions, and highly dispersed stability in ...
Zhang Cheng-Ming - - 2011
The effects of propionic acid on ethanol and glycerol production by Saccharomyces cerevisiae in cassava mash were examined along with the influence of pH (4.0, 5.0, and 6.0) and of dissolved solids content (22%, 25%, and 27%). Inhibition by propionic acid increased as solids content increased and medium pH declined. ...
Cavka Adnan - - 2011
Recent results show that treatments with reducing agents, including the sulfur oxyanions dithionite and hydrogen sulfite, efficiently improve the fermentability of inhibitory lignocellulose hydrolysates, and that the treatments are effective when the reducing agents are added in situ into the fermentation vessel at low temperature. In the present investigation, dithionite ...
Kim Jin-Woo - - 2011
Liberation of fermentable sugars from recalcitrant lignocellulosic biomass is one of the key challenges in production of cellulosic ethanol. Here we developed a two-stage pretreatment process using aqueous ammonia and dilute sulfuric acid in a percolation mode to improve production of fermentable sugars from rice straw. Aqueous NH(3) was used ...
Abdel-Rahman Mohamed Ali - - 2011
Lactic acid is an industrially important product with a large and rapidly expanding market due to its attractive and valuable multi-function properties. The economics of lactic acid production by fermentation is dependent on many factors, of which the cost of the raw materials is very significant. It is very expensive ...
Palanisamy Bruntha Devi - - 2011
Co-fermentation of finger millet with horse gram was carried out to produce inexpensive protein-rich food (dosa-an Indian breakfast food). Natural fermentation of finger millet-horse gram flour blend in different proportions (2:1, 3:1, 4:1 and 5:1) was performed for 24 h. Biochemical analysis showed reasonable drop in pH (6.6-4.2) and starch content ...
Gutsche K Amelie - - 2012
Lactobacillus sakei belongs to the main flora of raw fermented sausages and is used as starter culture. Bacterial starter cultures can convert amino acids to α-keto acids by aminotransferases. These α-keto acids are the precursors of aroma active aldehydes, alcohols and carboxylic acids. In this study the formation of aldehydes, ...
Li Hengye - - 2011
A new Wulff-type boronate was designed and synthesized. Upon immobilization on a polymeric monolith and acidified as boronic acid, the ligand exhibited specific boronate affinity to cis-diol compounds at medium acidic pH condition.
Wellner Anne - - 2011
As indicators of the early stage of the Maillard reaction in carrots, N-(furoylmethyl) amino acids (FMAAs) formed during acid hydrolysis of the corresponding Amadori products were analyzed using RP-HPLC with UV detection. N-epsilon-FM-Lys (furosine), FM-Gly, FM-Ala, FM-Val, FM-Ile, FM-Leu and FM-GABA were identified using synthesized standard material by means of ...
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