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Results 201 - 250 of 627
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Radin Dragoslava - - 2006
Approximately 100 CFU/cm2 of a five-strain mixture of Listeria monocytogenes was coinoculated onto frankfurters with three different concentrations (10(2), 10(4), and 106 CFU/cm2) of an undefined spoilage microflora derived from commercial frankfurters. The frankfurters were vacuum packaged and stored at 10 degrees C for up to 48 days. The populations ...
Bideaux Carine - - 2006
On the basis of knowledge of the biological role of glycerol in the redox balance of Saccharomyces cerevisiae, a fermentation strategy was defined to reduce the surplus formation of NADH, responsible for glycerol synthesis. A metabolic model was used to predict the operating conditions that would reduce glycerol production during ...
Popa Karin - - 2006
The living Lemna minor vascular plant and two different sorbents obtained by chemical treatment of this plant were tested to study the removal process of 60Co2+, 65Zn2+ and (55+59)Fe3+ from low radioactive wastewaters. The most effective sorbent was the protonated biomass, indicating the decisive contribution of the complexation process in ...
Reichl Franz-Xaver - - 2006
Unpolymerized resin (co)monomers or mercury (Hg) can be released from restorative dental materials (e.g. composites and amalgam). They can diffuse into the tooth pulp or the gingiva. They can also reach the gingiva and organs by the circulating blood after the uptake from swallowed saliva. The cytotoxicity of dental composite ...
Sakurai Yoshinori - - 2006
Boron neutron capture therapy (BNCT) without craniotomy for malignant brain tumours was started using an epi-thermal neutron beam at the Kyoto University Reactor in June 2002. We have tried some techniques to overcome the treatable-depth limit in BNCT. One of the effective techniques is void formation utilizing a tumour-removed cavity. ...
Oruc H H - - 2006
The distribution of aflatoxin M(1) (AFM(1)) has been studied between curd, whey, cheese and pickle samples of Turkish white pickled cheese produced according to traditional techniques and its stability studied during the ripening period. Cheeses were produced in three cheese-making trials using raw milk that was artificially contaminated with AFM(1) ...
Wieland Andrea - - 2006
Short-term effects of irradiance (0-1560 micromol photons m(-2) s(-1)), temperature (10-25 degrees C), and salinity (40-160) on oxygenic photosynthesis and oxygen consumption in a hypersaline mat (Salin-de-Giraud, France) were investigated with microsensors under controlled laboratory conditions. Dark O(2) consumption rates were mainly regulated by the mass transfer limitations imposed by ...
Coleman Ross A - - 2006
It is critical for our knowledge of biodiversity and ecosystem processes to understand how individual species contribute to ecosystem processes and how these contributions vary in space and time. We used a manipulative field experiment in five locations over 17 degrees of latitude [from southern Portugal to the Isle of ...
Yen Hong-Wei - - 2007
The unbalanced nutrients of algal sludge (low C/N ratio) were regarded as an important limitation factor to anaerobic digestion process. Adding high carbon content of waste paper in algal sludge feedstock to have a balanced C/N ratio was undertaken in this study. The results showed adding 50% (based on volatile ...
Wolff Diana - - 2006
PURPOSE: The aim of this study was to evaluate the cleaning efficacy of interdental brushes with different stiffnesses, e.g. soft and hard interdental brushes with identical brush diameter. MATERIALS AND METHODS: Cylindrical soft and hard interdental brushes with diameters of 2,3 and 5 mm each were tested. Sixteen extracted human ...
Dulekgurgen Ebru - - 2006
The study proposes direct particle size measurement by sequential filtration and ultrafiltration as a convenient method for wastewater characterization for appropriate treatment technology. It also explores the correlation between particle size distribution (PSD) and chemical oxygen demand (COD) fractionation, as an index for biological treatability. Profiles obtained through PSD-based COD ...
Shariatpanahi Ramineh E - - 2006
In the field of tissue engineering, promoting cell attachment and proliferation in polymer matrices is an attractive challenge for treating patients suffering from the loss or dysfunction of tissues or organs. In this study we have investigated the effect of grafting N-vinyl-2-pyrrolidone (NVP) by gamma irradiation onto polyvinyl alcohol (PVA), ...
Borole Abhijeet P - - 2006
Manure waste from dairy farms has been used for methane production for decades, however, problems such as digester failure are routine. The problem has been investigated in small scale (1-2 L) digesters in the laboratory; however, very little scale-up to intermediate scales are available. We report production of methane in ...
Maliska Alessandra N - - 2006
PURPOSE: To test a system of measuring early plaque formation (EPF) and its subgingival extension as related to the presence or absence of a plaque free zone (PFZ). MATERIALS AND METHODS: EPF was measured by three independent examiners following two consecutive 72-hour periods of undisturbed plaque build-up. One of the ...
Goldhammer Kirsten A - - 2006
OBJECTIVE: Transmission of bacterial and viral pathogens is known to occur by hand contact with fomites. Exercise equipment in public facilities may serve as such fomites. It is not known whether equipment disinfection might reduce microorganism colonization. We performed studies to address these issues. DESIGN: Observational study of bacterial and ...
Dabrowska E - - 2006
Chlorhexidine is an active agent commonly used against dental plaque in the mouth apart from fluorides applied to prevent caries. It is contained in toothpastes and mouthrinses. The aim of the study was to assess the effect of mouthrinses containing chlorhexidine digluconate on the activity of cathepsin C in human ...
O'Sullivan Cathryn A - - 2005
It is widely accepted that cellulose is the rate-limiting substrate in the anaerobic digestion of organic solid wastes and that cellulose solubilisation is largely mediated by surface attached bacteria. However, little is known about the identity or the ecophysiology of cellulolytic microorganisms from landfills and anaerobic digesters. The aim of ...
McCracken G I - - 2005
OBJECTIVES: To evaluate the crossover clinical trial design to assess plaque removal efficacy of the Sonicare Elite. MATERIAL AND METHODS: A single-cohort, 12-week, two-treatment, single-blind, crossover clinical trial recruited 45 subjects. Plaque was recorded using the modified Quigley and Hein index plaque index (PI). After screening, subjects used the toothbrush ...
Reeve Vivienne E - - 2005
Topical application of the isoflavone equol immediately following solar-simulated UV (SSUV) radiation exposure has previously been demonstrated to have significant photoprotective effects. Equol reduced both the inflammatory edema and the systemic suppression of the contact hypersensitivity reaction in hairless mice. Furthermore, daily topical equol application immediately following irradiation during a ...
Sirtori Carla - - 2006
In this study the photocatalytic degradation of aqueous solutions of camphor was investigated by using TiO2 and ZnO photocatalysts. In the presence of artificial UV-light the highly photosensitive camphor was almost totally degraded after reaction times of 60 min. However, under these conditions the mineralization degree was lower than 25%. ...
Jang Jong Hee - - 2006
Styrene gas removal was carried out in a biofilter inoculated with a styrene-degrading Pseudomonas sp. SR-5 using a mixed packing material of peat and ceramic under the non-sterile condition. More than 86% removal efficiency was obtained at styrene load of 5-93 g m(-3) h(-1) for 62 days operation period and ...
Sekino Satoshi - - 2005
The clinical effect of Listerine, a mouth rinse containing a mixture of phenolic compounds, is ascribed to its bactericidal properties. However, phenolic compounds are also known to interfere with the inflammatory process. The purpose of this clinical trial was to evaluate the effect of regular mouth rinsing with Listerine on ...
Asiltürk Meltem - - 2006
Pure anatase-TiO2 nanoparticles with 8 nm average crystallite size was synthesized hydrothermally at 200 degrees C in 2 h. The structural and physico-chemical properties of nano-TiO2 were determined by powder XRD, FT-IR, BET and SEM analyses. The behavior of anatase nano-TiO2 in catalytic degradation of Rhodamine B (RB) dye in ...
Shu Hung-Yee - - 2006
The treatment of leachate from landfills is a major disposal problem for municipal solid waste. The leachate is generally recalcitrant to be treated according to complicated characteristics and high color intensity resulting further threat for environment and human health. In this work, the designed thin gap annular photoreactor with 4-UV ...
Lusby Patricia E - - 2005
BACKGROUND: Renewed interest in honey for various therapeutic purposes including treatment of infected wounds has led to the search for new antibacterial honeys. In this study we have assessed the antibacterial activity of three locally produced honeys and compared them to three commercial therapeutic honeys (including Medihoney and manuka honey). ...
Cameselle C - - 2005
The investigation presented here focussed on the electrochemical decolourisation of a commercial, textile indigo dye, in an undivided electrochemical cell using graphite electrodes. The decolourisation values obtained employing halide salts--sodium chloride, potassium bromide and potassium iodide--and a reductive agent--sodium meta-bisulphite--as electrolytes are higher than those attained when no electrolyte was ...
Guo Zhaobing - - 2005
The influences of ultrasonic output intensity, solution pH, H2O2 concentration and the addition of Fenton reagent on the degradation of 2,4-dinitrophenol (DNP) under ultrasonic irradiation were investigated. It was observed that the degradation of DNP fitted pseudo-first-order dynamics under our experimental conditions. Increasing the ultrasonic output intensity increased the degradation ...
Mentula Silja - - 2005
The microbiota of the small intestine is poorly known because of difficulties in sampling. In this study, we examined whether the organisms cultured from the jejunum and feces resemble each other. Small-intestinal fluid samples were collected from 22 beagle dogs with a permanent jejunal fistula in parallel with fecal samples. ...
Zhuang Wei-Qin - - 2005
This study demonstrates the utility of the sequencing batch reactor (SBR) to adapt microorganisms towards biological removal of tert-butyl alcohol (TBA). The reactor was inoculated with activated sludge and fed with TBA as the sole carbon source. Start-of-cycle TBA concentrations were initially set at 100 mgL(-1) with a cycle time ...
Dawes C - - 2006
OBJECTIVE: To determine whether some of the urea added to certain chewing gums may be absorbed through the oral mucosa and whether some saliva is inadvertently swallowed during the collection of saliva elicited by the chewing of gum. DESIGN: On two occasions, 10 experienced saliva collectors made a 5 min ...
Krishna Kumar R - - 2005
Removal of 4,4'-dimethoxytrityl (DMT) groups from primary and secondary hydroxyl functionality was investigated. It was observed that deblocking of DMT group from secondary hydroxyl group of molecules attached to solid support under acidic conditions occurred relatively slowly compared to primary hydroxyl group. Marginal difference in rate of detritylation was observed ...
You S J - - 2005
In this study, the performance and microbial community in a submerged membrane bioreactor were investigated for different hydraulic retention times. The removal efficiencies of chemical oxygen demand, total phosphorus, suspended solid and heterotrophic bacteria did not differ significantly with different hydraulic retention times but the total nitrogen removal efficiency increased ...
Lakosi L - - 2005
A non-destructive method for assaying transuranic neutron sources was developed, using a combination of gamma-spectrometry and neutron correlation technique. Source strength or actinide content of a number of PuBe, AmBe, AmLi, (244)Cm, and (252)Cf sources was assessed, both as a safety issue and with respect to combating illicit trafficking. A ...
Sarjeant K C - - 2005
The effect of high-energy electron beam irradiation on the survival of Salmonella enterica serovar Typhimurium and psychrotrophic bacteria on commercial chicken breast meat was evaluated. Fresh chicken breast meat was purchased from a local poultry processor, inoculated with 8 log10 cfu/mL Salmonella, packaged in Styrofoam trays and over wrapped with ...
Venning A J - - 2005
The effect of vacuum pumping on the dose response of the MAGAS polymer gel dosimeter has been investigated. A delay of several days post-manufacture before irradiation was previously necessary due to the slow oxygen scavenging of ascorbic acid. The MAGAS polymer gel dosimeter was vacuum pumped before gelation to remove ...
Ezeji Thaddeus C - - 2005
The effect of factors such as gas recycle rate, bubble size, presence of acetone, and ethanol in the solution/broth were investigated in order to remove butanol from model solution or fermentation broth (also called acetone butanol ethanol or ABE or solvents). Butanol (8 g L(-1), model solution, Fig. 2) stripping ...
Bonjoch Xavier - - 2005
Bifidobacteria are one of the main groups of bacteria found in the intestine of humans and other animals. They have been proposed as indicators to identify the source of fecal pollution, since certain Bifidobacterium spp. are found only in humans. However, species identification remains difficult, and has limited their practical ...
Makihara Eri - - 2005
OBJECTIVE: The aim of the present study was to evaluate the facial thermographic changes before and after low-level laser irradiation applied to the temporomandibular joint in normal subjects. BACKGROUND DATA: Although this therapy has been reported to be effective in the pain management of patients with rheumatoid arthritis and degenerative ...
Zhang ZhiJian - - 2006
A laboratory-scale experiment presents data that reveal the temporal characteristics of solids, biochemical oxygen demand (BOD5) and volatile fatty acids (VFAs) in the aerated liquid swine manure for minimizing odor generation potential during 190-day storage. The performance of 15-day aeration of liquid manure with initial total solids (TS) content from ...
Bhargava Swapnil - - 2005
For many years, high broth viscosity has remained a key challenge in large-scale filamentous fungal fermentations. In previous studies, we showed that broth viscosity could be reduced by pulsed addition of limiting carbon during fed-batch fermentation. The objective in this study was to determine how changing the frequency of pulsed ...
Leitão Renato Carrhá - - 2006
With the aim of improving knowledge about the stability and reliability of anaerobic wastewater treatment systems, several researchers have studied the effects of operational or environmental variations on the performance of such reactors. In general, anaerobic reactors are affected by changes in external factors, but the severity of the effect ...
Sánchez E - - 2005
A study of anaerobic digestion of piggery wastewater was carried out in a laboratory-scale sludge bed reactor as a secondary treatment. The effect of organic volumetric loading rates (BV) in the range of 1.0-8.1 g TCOD/ld on the process performance was evaluated. The best results were obtained at BV equal ...
Barley R W - - 2005
An assessment of the rate of biomass production both of the reeds in the aerobic cells and the algae in the rock filters, which form the final stage in the series of treatment cells, has been undertaken. The biomass production for the reeds was found to be highest for the ...
Emery Richard J - - 2005
The degradation of triphenylphosphine oxide (TPPO) in water, a toxic compound typically found in effluents from the pharmaceutical industry, by means of ultrasonic irradiation at 20 kHz has been investigated with emphasis on the effect of various parameters on conversion and acute toxicity. Experiments were carried out at liquid volumes ...
Versteeg P A - - 2005
OBJECTIVES: This study was designed to evaluate two factors possibly influencing incidence of gingival abrasion during toothbrushing: (1) the abrasiveness of a dentifrice and (2) the possible influence of feedback of oral sensory perception. MATERIAL AND METHODS: For this purpose, two separate, single blind, randomized clinical experiments were performed. The ...
Masurat P - - 2005
AIMS: To characterize the biofilms in an interim wet storage system (CLAB) for spent nuclear fuel. METHODS AND RESULTS: Planktonic cells and biofilms were analysed with fluorescence microscopy, and scanning and transmission electron microscopy. The organisms in the biofilms were filamentous, consisting of sheaths with series of rod-shaped cells in ...
Oishi Koji - - 2005
Precise estimation of induced activities in concrete shields for high-energy accelerator facilities is one of the most important issues that need to be solved, not only for the reduction of exposure for workers, but also for the reduction of radioactive wastes. Irradiation experiments have been performed by using the 500 ...
Prendergast J - - 2005
A laboratory sequencing batch biofilm reactor (SBBR), operated for a period of 158 days, was used to treat domestic-strength synthetic effluent. The biofilm reactor comprised a bulk fluid reactor, a biofilm plastic module, a synthetic wastewater feed tank, and pneumatic devices with pneumatic controls. The reactor cycle time was 8 ...
Antal T K - - 2005
AIMS: To examine sulphur (S) deprivation in combination with the presence of methane (CH4) and changes in extracellular pH as a method to enhance in situ hydrogen (H2) generation during fermentation in the unicellular non-diazotrophic cyanobacteria Gloeocapsa alpicola and Synechocystis PCC 6803. METHODS AND RESULTS: The level of H2 production, ...
Searcy E M L - - 2005
This study evaluated the performance of a lab-scale, closed bed biofilter for the removal of odour in off-gas released from an industrial fermentation facility. This off-gas was emitted from the facility periodically after the sterilization of fermentation medium. The lab scale biofilter was operated for over two months, totalling 30 ...
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