Search Results
Results 151 - 200 of 627
1 2 3 4 5 6 7 8 9 10 >
Barbut Frederic - - 2007
We assessed the efficacy of 2 alcohol-based gels and 1 alcohol-based rinse for surgical hand disinfection, using European standard EN 12791. Volunteers performed surgical hand disinfection with a reference product and each of the 3 study products, with 1-week intervals between disinfection episodes. The immediate and sustained antimicrobial activities of ...
van Waasbergen Lorraine G - - 2007
Highly fluorinated tris(pyrazolyl)borates were tested for their antimicrobial activity against various bacterial species. Both the silver(I) tris(pyrazolyl)borate [HB(3,5-(CF(3))(2)Pz)(3)]Ag(THF) (THF=tetrahydrofuran) and the sodium analog [HB(3,5-(CF(3))(2)Pz)(3)]Na(THF) appeared highly effective at inhibiting the growth of two different species of Gram-positive bacteria (i.e. being 12 and 21 fold more effective, respectively, (on a molar ...
Possemiers Sam - - 2007
Many studies have investigated the importance of the intestinal bacterial activation of individual phytoestrogens. However, human nutrition contains different phytoestrogens and the final exposure depends on the microbial potential to activate all different groups within each individual. In this work, interindividual variations in the bacterial activation of the different phytoestrogens ...
Rodríguez Alejandro - - 2008
Oil palm empty fruit bunches were used as an alternative raw material to obtain cellulosic pulp. Pulping was done by using high-boiling point organic solvents of decreased polluting power relative to classical (Kraft, sulphite) solvents but affording operation at similar pressure levels. The holocellulose, alpha-cellulose and lignin contents of oil ...
Auriol Muriel - - 2007
Steroid estrogens, including both natural estrogens (e.g., estrone - E1; 17beta-estradiol - E2; and estriol - E3) and synthetic estrogens (e.g., 17alpha-ethinylestradiol - EE2), are known as endocrine-disrupting compounds. The objective of this research was to evaluate the feasibility of the enzymatic oxidation of estrogens and to optimize this process ...
Stoeken J E - - 2007
BACKGROUND: Chlorhexidine (CHX) is widely accepted as the most effective product in the control of supragingival plaque. It is available in different delivery devices. The aim of this study was to test whether 0.12% CHX spray was as effective as 0.2% CHX spray and 0.2% CHX mouthwash in a 3-day ...
Lebaron-Jacobs L - - 2007
Use of hair as a biological dosimeter of neutron exposure was proposed a few years ago. To date, the (32)S(n,p)(32)P reaction in hair with a threshold of 2.5 MeV is the best choice to determine the fast neutron dose using body activation. This information is essential with regards to the ...
Kobayashi Daisuke - - 2008
Ultrasonic generators are used as emulsifiers and efficient alternative initiators in polymerization processes. In this study, the effects of reactor's position on the emulsion polymerization of styrene under indirect ultrasonic irradiation were investigated, along with the effects of reactor's position on chemical and physical degradation. Both polymer yield and molecular ...
Cook Kimberly L - - 2007
Skatole is one of the most malodorous compounds produced from the anaerobic degradation of animal waste. Little is known about the biochemistry of skatole production, the phylogeny of skatole-producing microorganisms or the conditions that favor their growth. These deficiencies hamper attempts to reduce skatole production. Our goals were to enrich ...
De Brito-Pelegrini N N - - 2007
Textile effluents are a result of the use of reactive dyes which present a strong environmental impact. These are substances of concern when conventional treatment processes are to be considered. This work refers to the study of post-treatment (purification) of the textile effluent originating from the use of reactive dyes ...
Venkata Mohan S - - 2008
The performance of aerated and ferricyanide catholytes on the bioelectricity production was evaluated in dual chambered microbial fuel cell (MFC) (mediatroless anode; graphite electrodes) employing selectively enriched H(2) producing mixed consortia as anodic inoculum. Two MFCs with aerated catholyte (MFC(AC)) and ferricyanide catholyte (MFC(FC)) were operated separately to elucidate the ...
Kim Jung Hoon - - 2007
The performance of a lab scale biofilter packed with biomedia, encapsulated by sodium alginate and polyvinyl alcohol was used for treating ammonia (NH(3)) gas at different loading rates. The metabolic end products during NH(3) oxidation were NH(4)(+), NO(3)(-) and NO(2)(-). It is noteworthy to mention that the immobilized cell biofilter ...
Glover Kent C - - 2007
High-saturation pools of dense nonaqueous phase liquid (DNAPL) are long-term sources of groundwater contamination at many hazardous-waste sites. DNAPL pools consist of a high saturation zone with slow dissolution overlaid by a transition zone with lower saturations and more rapid dissolution. Effects of biological activity on pool dissolution must be ...
Hall M B - - 2007
Effects of sucrose (Suc) concentration on fermentation kinetics and products were evaluated using 3 concentrations of Suc, with 1 concentration of isolated NDF from Bermudagrass fermented together in batch culture in vitro with rumen inoculum. Fixed amounts of medium and inoculum were the protein sources, so protein:Suc decreased with increasing ...
Cherry Martin - - 2007
AIM: To investigate rinsing with povidone-iodine on bacteraemia caused by ultrasonic scaling. MATERIAL AND METHODS: Sixty patients with gingivitis undertook a randomized, placebo-controlled trial in which 30 rinsed with 0.9% saline and 30 with 7.5% povidone-iodine for 2 min. before ultrasonic scaling of FDI teeth 31-35. Blood samples before and ...
Ariesyady Herto Dwi - - 2007
The phylogenetic and functional diversity of syntrophic propionate-oxidizing bacteria (POB) present in an anaerobic digester was investigated by microautoradiography combined with fluorescent in situ hybridization (MAR-FISH) that can directly link 16S rRNA phylogeny with in situ metabolic function. The syntrophic POB community in the anaerobic digester sludge consisted of at ...
Vlaeminck Siegfried E - - 2007
The biomass of an oxygen-limited autotrophic nitrification/denitrification (OLAND) biofilm reactor was preserved in various ways to find a storage method for both aerobic and anaerobic ammonium-oxidizing bacteria (AerAOB and AnAOB). Storage occurred at -20 degrees C with and without glycerol as cryoprotectant and at 4 and 20 degrees C with ...
Aksoy Alev - - 2007
OBJECTIVE: To determine antibacterial activity of chewing mastic gum against the salivary levels of Streptococcus mutans, the total number of viable bacteria, and lactobacilli in patients undergoing therapy with fixed orthodontic appliances. MATERIALS AND METHODS: In this study, the levels of S mutans, lactobacilli, and total cultivated bacteria were measured ...
Slade A H - - 2007
The pulp and paper industry has invested heavily over recent years in cleaner processing, to reduce losses and minimise its impact on the environment. Over the past fifteen years, a New Zealand integrated bleached kraft mill has undergone a comprehensive programme of upgrades to increase production, reduce water consumption and ...
Prager Lutz - - 2007
The photochemical conversion of 200-500 nm layers of perhydropolysilazane --(SiH2-NH)n-- (PHPS) in the presence of oxygen into an SiOx network was studied. Different UV sources in the wavelength range of 160-240 nm, that is, 172 nm Xe2* and 222 nm KrCl* excimer, and 185 nm Hg low-pressure (HgLP) lamps were ...
Goyal C Ram - - 2007
OBJECTIVE: To evaluate the efficacy and safety of a novel ultrasound power toothbrush over a 30-day period in a population with mild to moderate gingivitis. METHODOLOGY: A 30-day, randomized, examiner-blind, parallel-arm study was conducted to evaluate the safety and efficacy of a ultrasound novel power toothbrush (Ultreo - ULT) as ...
Chapple I L C - - 2007
BACKGROUND: Oxidative stress is implicated in the pathogenesis of periodontitis. The total antioxidant capacity (TAOC) of gingival crevicular fluid volume (GCF) and plasma appears compromised in periodontitis, but it is unclear whether this predisposes to, or results from the inflammatory process. AIM: To investigate longitudinal changes in GCF and plasma ...
Rezania B - - 2006
A general method for measurement of active biomass and decay coefficient and Extracellular polymeric substances (EPS) concentration in steady-state biomass was developed. The model was applied to the process of hydrogenotrophic denitrification in order to measure biomass constituents and decay and yield coefficients. It was found that steady-state biomass obtained ...
Hyvärinen Helena K - - 2006
This study investigated the effects of processing and storage on the stability of purified, flaxseed-derived secoisolariciresinol diglucoside (SDG) added to milk prior to the manufacture of different dairy products. We analyzed the effect of high-temperature pasteurization, fermentation, and milk renneting as well as storage on the stability of SDG added ...
Martínez Mariela - - 2007
We describe a new, faster and convenient method to study some metabolic characteristics - by the successful application of immobilized yeast cells (S. cerevisiae) in a microbial biosensor-like device. Microbial biosensors consist of microorganisms immobilized on the surface of a membrane or in a gel, in close contact with a ...
Szanto G L - - 2007
Straw-rich manure from organic pig farming systems was composted in passively aerated static piles to estimate the effect of monthly turning on organic matter degradation and NH(3), N(2)O and CH(4) emissions. Turning enhanced the rate of drying and degradation. The four-month treatment degraded 57+/-3% of the initial organic matter in ...
Leonhardt Asa - - 2006
OBJECTIVE: Antiseptics and antibiotics delivered either locally or systemically have been used as an adjunct to scaling and root planing procedures in order to control the subgingival biofilm and thereby enhancing the treatment outcome. The results presented in the literature are, however, inconclusive. Povidone-iodine (PVP-iodine) has a bactericidal effect and ...
Faveri Marcelo - - 2006
BACKGROUND: The purpose of the present investigation was to determine the effect of the absence of tongue hygiene on the microbiota of the dorsum of the tongue. METHODS: Ten volunteers (aged 19 to 22 years) entered the study at baseline and were instructed to abstain from tongue cleaning for 7 ...
Nielsen David R - - 2006
The performance and stability of a two-phase partitioning bioscrubber (TPPB) containing 33% (vol.) n-hexadecane as an immiscible phase was investigated during 30 days of continuous gaseous benzene treatment. Elimination capacities of 141 +/- 12 g/m(3) h were achieved by Achromobacter xylosoxidans Y234 while maintaining >99% removal throughout. A new steady-state ...
Yoon Sang-Hwal - - 2006
To increase expression of lycopene synthetic genes crtE, crtB, crtI, and ipiHP1, the four exogenous genes were cloned into a high copy pTrc99A vector with a strong trc promoter. Recombinant Escherichia coli harboring pT-LYCm4 produced 17 mg/L of lycopene. The mevalonate lower pathway, composed of mvaK1, mvaK2, mvaD, and idi, ...
Verma M - - 2006
Dissolved oxygen (DO) concentration was selected as a principal parameter for translating results of shake flask fermentation of Trichoderma viride (biocontrol fungi) to a fermenter scale. All fermentations were carried out in a 7.5 l automated fermenter with a working volume of 4 l. Fermentation performance parameters such as volumetric ...
Cho E S - - 2007
The PEMMC-Biobarrel (packed-bed of entrapped mixed microbial cells with Bio-barrel) process and MEMMC-Biobarrel (moving EMMC-Biobarrel) process were investigated for enhancing concurrent organic and nitrogen removal with applied intermittent aeration. For the PEMMC-Biobarrel process, the EMMC-Biobarrel carriers were employed at a packing ratio of 20%. In the MEMMC-Biobarrel process, the EMMC-Biobarrel ...
Garibay-Orijel Claudio - - 2006
A fluidized bed bioreactor (FBBR) was operated for more than 1000 days under two regimes, Methanogenic (M) and Methanogenic-Aerobic (M-A), to remove 2,4,6-trichlorophenol (TCP) and phenol (Phe) from a synthetic wastewater, containing different amounts of TCP and Phe, using different aeration flow-rates (0, 2.13, and 1.06 NL O(2)/L.day). M conditions ...
van Weringh M - - 2006
OBJECTIVES: The aim of the present study was to assess the probing force exerted when using two manual periodontal probes with different handle diameters in hands of different dental professionals. METHODS: For this study two periodontal probes with handle diameters of 54 and 92 mm were used. The 11 subjects ...
Angelidaki Irini - - 2006
Two feeding strategies for start-up of continuously stirred tank reactors (CSTR) treating source-sorted organic fraction of household municipal solid waste (SS-OFMSW) at 55 degrees C were evaluated. Two reactors were started up separately with a limited amount of initial inoculum (i.e. 10% of the final volume of 3.5l) and operated ...
Chan Chin-Han - - 2007
Performance of the sequencing batch reactor (SBR) treating synthetic phenolic wastewater at influent phenol concentrations from 100 to 1000 mg/L was evaluated. Two identical SBRs were built and operated with FILL, REACT, SETTLE and DRAW periods in the ratio of 4:6:1:1 for a cycle time of 12h. One of the ...
Demura Shinichi - - 2006
OBJECTIVE: This study aimed at comparing the effect of linear polarized near-infrared light irradiation (PL irradiation) and bicycle exercise with 50%HRreserve on the flexibility of the shoulder joint. DESIGN: Placebo-controlled trial. SETTING: Twenty-four healthy young adults (10 males: mean+/-SD, age 20.9+/-3.1 y, height 171.0+/-3.9 cm, body mass 63.4+/-3.5 kg and ...
Hitosugi Masahito - - 2006
We present a practical case in which the fungi have contributed to the estimation of postmortem interval of the cadaver. A 71-year-old man wearing a shirt and pants was found dead at the bottom of an open well about 6m below the ground in his garden. Externally the face was ...
Nakkharat Phimchanok - - 2006
Discontinuous and continuous processes of lactose hydrolysis and concomitant galacto-oligosaccharide (GalOS) formation were studied. To this end a wide experimental range of the main variables was evaluated, including the initial lactose concentration, the degree of lactose conversion, the pH value and the temperature for discontinuous transformations, while the initial lactose ...
Erdemir Ebru Olgun - - 2006
BACKGROUND: The purpose of this study was to evaluate the effect of smoking on the salivary minerals in subjects with chronic periodontitis by the inductively coupled plasma-atomic emission spectrophotometry (ICP-AES) technique. METHODS: The study group included 24 subjects-12 smokers and 12 non-smokers-with chronic periodontitis. Clinical measurements and non-stimulated whole saliva ...
Gadekar S - - 2006
Aqueous phase biooxidation of sulphide by the novel sulphide-oxidizing bacterium Thiomicrospira sp. CVO was studied in batch and continuous systems. CVO was able to oxidize sulphide at concentrations as high as 19 mM. Sulphide biooxidation occurred in two distinct phases, one resulting in the formation of sulphur and possibly other ...
Comte J - - 2006
We investigated the dynamics and diversity of heterotrophic bacteria, autotrophic and heterotrophic flagellates, and ciliates from March to July 2002 in the surface waters (0-50 m) of Lake Bourget. The heterotrophic bacteria consisted mainly of "small" cocci, but filaments (>2 microm), commonly considered to be grazing-resistant forms under increased nanoflagellate ...
Kannan N - - 2006
Physico-chemical characteristics of distillery effluent samples have been determined. The water quality parameters (WQPs) measured are colour, pH, electrical conductivity, turbidity, total dissolved solids (TDS), chloride, total hardness (THA), calcium, iron, bio-chemical oxygen demand (BOD) and chemical oxygen demand (COD). Almost all the values of WQPs of the distillery effluents ...
Wang Jun - - 2006
The nanometer rutile titanium dioxide (TiO2) powder was adopted to act as the sonocatalyst after treatment of high-temperature activation and the ultrasound of low power was used as an irradiation source to induce heat-treated TiO2 powder performing sonocatalytic degradation of parathion. Although there are many factors influencing sonocatalytic degradation of ...
Ahn Young Ho - - 2006
The performance of a novel fermentation process, adopting a sludge blanket type configuration, for higher hydrolysis/acidogenesis of the municipal primary sludge was investigated under batch and semi-continuous conditions with varying pH and temperature. This acid elutriation slurry reactor provided higher system performance with a short HRT (5d) and higher acidogenic ...
Hew Carrie M - - 2006
This study addressed health risks from ethnic sausages produced on a small scale, without inspection, in California and elsewhere. Mexican-style chorizo, a raw pork sausage that is not cured, fermented, or smoked, was contaminated experimentally in the batter with Escherichia coli O157:H7, Listeria monocytogenes, or Salmonella serotypes and stuffed into ...
Olson Sandra R - - 2006
We conducted a study in the summer of 2004 at county fairs in the Midwest to investigate the role poultry exhibits have in spreading avian pathogens to humans. A nearly invisible powder (pathogen surrogate) that fluoresces under UV light was surreptitiously sprinkled each day on 1 show bird at each ...
Farrell Svetlana - - 2006
Bacterial proliferation and plaque accumulation on the surface of the tongue are major factors contributing to oral malodor. In this research, we used subjective and objective methods to evaluate the breath benefit of a triclosan-containing dentifrice (Blend-a-Med Complete Night) with and without tongue brushing in a randomized, examiner-blinded, three-period crossover ...
Gogate Parag R - - 2006
Degradation of formic acid has been studied in a high frequency cup horn type reactor with an aim of understanding the effect of operating parameters on the destruction efficiency. The methodology used in the work serves as a useful guideline for the optimization exercise for the sonochemical reactors to establish ...
Kikuchi Masafumi - - 2006
As part of our systematic studies characterizing the properties of titanium alloys, we investigated the grindability of a series of cast Ti-Hf alloys. Alloy buttons with hafnium concentrations up to 40 mass% were made using an argon-arc melting furnace. Each button was cast into a magnesia-based mold using a dental ...
1 2 3 4 5 6 7 8 9 10 >