Search Results
Results 301 - 350 of 643
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Halla-Júnior Ronald - - 2004
PURPOSE: This study aimed to evaluate the effect of flossing on the presence of plaque and gingivitis in school students undertaking supervised oral hygiene. MATERIALS AND METHODS: Thirty-three non-users of dental floss were selected from a larger panel. The study had a preliminary phase of 21 days, followed by two ...
Seo G T - - 2004
A pilot scale experiment was conducted to evaluate the performance of a membrane bioreactor filled with high concentration powdered activated carbon. This hybrid system has great potential to substitute for existing GAC or O3/BAC processes in the drinking water treatment train. The system was installed at a water treatment plant ...
Kim S M - - 2004
In order to enhance the solid-liquid separation properties and nitrogen removal efficiency of SBR, the aerobic floc-like granules were cultivated under temporal alternating aerobic and anoxic conditions without the presence of carrier material in a SBR having 15 H/D (height/diameter) ratio. Two different effluent port positions were applied to the ...
Li Z - - 2004
This paper aims to evaluate the curative effects of low-intensity laser external radiotherapy through thermal texture mapping (TTM) technology. The influences of 30 min nasal cavity irradiation of semiconductor laser (650 nm, 5 mW, continuous wave) on microcirculation were investigated through TTM. At the same time, with the aid of ...
Novaes Júnior Arthur Belém - - 2004
Gingival inflammation is clinically characterized by gingival redness, swelling and increased tendency of bleeding of the soft tissue. Bacterial biofilm is the etiological agent. If, at this stage, the bacterial biofilm is removed and appropriate control methods are applied, remission of gingival inflammation occurs. This study evaluated the effectiveness of ...
Borges A C - - 2004
The effect of the filling stage on the behavior of a mechanically stirred anaerobic sequencing batch reactor containing biomass immobilized on 1 cm polyurethane foam cubes was investigated. The reactor was made of acrylic with a capacity of 6.3 L, treating per cycle 2.5 L synthetic low-strength wastewater with a ...
Manios Thrassyvoulos - - 2004
Shredded green wastes were composted in windrows, at the Harewood Whin landfill, near the city of York, in West Yorkshire, UK. Landfill leachate were added twice during the second and fourth week of the process in two piles. One pile was turned once every week for eight weeks and the ...
Jinadasa K B S N - - 2004
Anaerobic Toxicity Assay (ATA) tests were conducted on acidogenic cultures to assess the feasibility of using acidogenic processes to treat wastewaters containing 2-nitrophenol. Results indicated 2-nitrophenol could be removed with a removal efficiency of more than 98%. 2-aminophenol was identified as the major metabolite of the biotransformation of 2-nitrophenol. Reduction ...
Cho E S - - 2004
The effects of sequentially combined carbon (SCC) using a symbiotic relationship of methanol and acetic acid on biological nutrient removal were investigated in both the continuous bench scale process consisting of an anoxic, an aerobic and a final settling tank and intensive batch tests. Compared to the use of respective ...
Sreenivasan P K - - 2004
A randomized and cross-over design clinical study with normal adult volunteers examined the effects of a 0.12% chlorhexidine (CHX) mouthrinse and a control rinse on a range of microflora including those implicated in halitosis on the tongue and saliva. Saliva and tongue scrapings were collected from 13 subjects prior to ...
Mahrour A - - 2003
Chicken legs were subjected to two pretreatments (packaged in air or marinated in natural plant extracts and then packaged in air) followed by irradiation (0, 3, or 5 kGy). The control and irradiated chicken legs were stored at 4 degrees C and underwent microbial analysis (mesophilic aerobic plate counts and ...
Rodrigues José Alberto Domingues - - 2003
This work presents an analysis of a stirred anaerobic sequencing discontinuous reactor with different substrate feeding strategies resulting in batch, fed-batch/batch and fed-batch operating modes. The reactor, containing granulated biomass, was fed with approximately 2.0L of synthetic domestic wastewater with Chemical Oxygen Demand of nearly 500 mg/L per cycle and ...
Torres S R SR Department of Oral Pathology and Oral Diagnostic, School of Dentistry, Universidade Federal do Rio de Janeiro, Brazil. - - 2003
In order to investigate the clinical factors that might influence the diversity and the degree of Candida species carriage in saliva, we conducted a cross-sectional study with 133 patients with complaints of xerostomia. Anamnesis, oral examination and collection of chewing-stimulated whole saliva were performed. The samples of saliva were kept ...
Foucault-Bertaud A - - 2003
The aim of this study was to determine if a vegetable extract from seeds of Lupinus albus (LU 105) has the capacity to inhibit human leukocyte elastase and/or protect gingival elastic fibers against proteolytic degradation. LU105 was extracted from seeds of L albus and is freely soluble in water. In ...
Steer Toni E - - 2003
The isoflavone genistein is found predominantly in soybeans and is thought to possess various potent biological properties, including anti-carcinogenic effects. Studies have shown that genistein is extensively degraded by the human gut microflora, presumably with a loss of its anti-carcinogenic action. The aim of the present study was to investigate ...
Newman Seth A - - 2003
BACKGROUND: Enamel matrix derivative (EMD) is used during periodontal surgery for the regeneration of periodontal tissue. It consists of the amelogenin fraction of porcine enamel matrix (AMEL) suspended in a vehicle of propylene glycol alginate (PGA). EMD-treated sites appear to heal with less inflammation. It has been suggested that antimicrobial ...
Lin Jian - - 2003
Our previous studies have led to a novel "nonrelease" approach to making materials bactericidal by covalently attaching certain moderately hydrophobic polycations to their surfaces. In the present work, this strategy is extended beyond the heretofore-used nonporous materials to include common woven textiles (cotton, wool, nylon, and polyester). Pieces of such ...
Zhang Fan - - 2003
BACKGROUND: The objective of this prospective cross-sectional study was to determine if cyclo-oxygenase-2, or COX-2, is overexpressed in the inflamed gingival tissue of patients diagnosed as having moderate-to-severe chronic periodontitis, or CP. METHODS: The authors evaluated clinical measures, crevicular fluid and gingival biopsy specimens from patients with moderate or severe ...
Oxley Jimmie C - - 2003
Post-blast residues are potential interferents to chemical detection of landmines. To assess the potential problem related to 2,4,6-trinitrotoluene (TNT), its post-blast residue was identified and quantified. In the first part of this study laboratory-scale samples of TNT (2 g) were detonated in a small-scale explosivity device (SSED) to evaluate the ...
Gerlach Robert W - - 2003
A randomized, examiner-blind, parallel-group, 3-week clinical trial evaluated the efficacy and safety of 3, popular, direct-to-consumer whitening products: a paint-on gel, a whitening dentifrice, and whitening strips. Both the paint-on gel (18% carbamide peroxide) and the whitening strips (6% hydrogen peroxide) were peroxide-based systems, while the dual-phase whitening dentifrice incorporated ...
Cullinan M P - - 2003
OBJECTIVES: The present study describes the natural history of Porphyromonas gingivalis, Actinobacillus actinomycetemcomitans and Prevotella intermedia over a 5-year period and the effect of a triclosan/copolymer dentifrice on these organisms in a normal adult population. MATERIAL AND METHODS: Subgingival plaque samples were collected from 504 adult volunteers. Probing pocket depths ...
Kiørboe Thomas - - 2003
We studied the dynamics of microbial communities attached to model aggregates (4-mm-diameter agar spheres) and the component processes of colonization, detachment, growth, and grazing mortality. Agar spheres incubated in raw seawater were rapidly colonized by bacteria, followed by flagellates and ciliates. Colonization can be described as a diffusion process, and ...
Converti Attilio - - 2003
The effect of oxygen availability on the metabolism of Enterobacter aerogenes NCIMB 10102 was studied through batch fermentations of glucose performed increasing the specific oxygen uptake rate up to 72.7 mmol(O2) C-mol(DW) (-1) x h(-1). The final concentrations of fermentation products of this biosystem (2,3-butanediol, hydrogen, acetoin, formate, acetate, carbon ...
Bailey S R - - 2003
Acute laminitis has been associated with the overgrowth of gram-positive bacteria within the equine hindgut, causing the release of factor(s) leading to ischemia-reperfusion of the digits. The products of fermentation which trigger acute laminitis are, as yet, unknown; however, vasoactive amines are possible candidates. The objectives of this study were ...
Kiani Mohammad F - - 2003
Ionizing radiation exposure significantly alters the structure and function of microvascular networks, which regulate delivery of oxygen to tissue. In this study we use a hamster cremaster muscle model to study changes in microvascular network parameters and use a mathematical model to study the effects of these observed structural and ...
Thomas S - - 2003
OBJECTIVE: To compare the antimicrobial activity of four silver-containing dressings: Acticoat (Smith and Nephew), Actisorb Silver 220 (Johnson and Johnson), Avance (SSL International) and Contreet-H (Coloplast). METHOD: The dressings were tested against three micro-organisms: a Gram-positive bacterium, Staphylococcus aureus; a Gram-negative organism, Escherichia coli; and a yeast, Candida albicans, using ...
Richter Hanno - - 2003
The heterolactic bacterium Oenococcus oeni ferments fructose by a mixed heterolactic/mannitol fermentation. For heterolactic fermentation of fructose, the phosphoketolase pathway is used. The excess NAD(P)H from the phosphoketolase pathway is reoxidized by fructose (yielding mannitol). It is shown here that, under conditions of C-limitation or decreased growth rates, fructose can ...
Lyew D - - 2003
The effects of four aeration and four organic loading (OLR) rates on trichloroethylene (TCE) degradation in methanogenic-methanotrophic coupled reactors were studied using ethanol as the carbon source for the methanogens. Microcosm and PCR studies demonstrated that methanotrophs capable of mineralizing TCE and methanogens were present in the biomass throughout the ...
Maeda Isamu - - 2003
Growth of and hydrogen production by wild-type (WT) Rhodovulum sulfidophilum were compared with those by one of its mutants lacking the poly(3-hydroxybutyrate) (PHB) biosynthesis ability (PNM2). During phototrophic growth under aerobic conditions with fixed illumination, changes in the extinction coefficient and PHB content of WT and PNM2 cells revealed interference ...
AlmståhI A - - 2003
We analysed and compared the oral microbial flora in four groups with hyposalivation caused by radiation therapy (RT), primary Sjögren's syndrome (pSS), medication or unknown factors (Unknown), or neuroleptic treatment (Neuro). A control group with normal salivary secretion was also included. The subjects included were 54 +/- 8 years old ...
Perinetti Giuseppe - - 2003
BACKGROUND: During orthodontic tooth movement, the early response of periodontal tissues to mechanical stress involves an acute inflammatory response, with a sequence characterized by periods of activation, resorption, reversal, and formation in both tension and compression sites. This study used a longitudinal design to examine aspartate aminotransferase (AST) activity in ...
Won X H - - 2003
A two-stage SBR system treating the wastewater containing copper-phthalocyanin dye-Reactive Turquoise Blue KN-G (C. I. Reactive Blue 21, denoted by RTB) was investigated during a 200-cycle operation. The performance of the system, including pollutant removal rates, operating stability and sludge characteristics, may be a concern in the long-term run. The ...
El-Tawila Mahmoud M - - 2003
This study aimed to determine the effect of bread making steps on the stability of aflatoxin. Sakha 8 wheat and Gemaiza 5 wheat cultivars, were used in the present study. They were inoculated with a dense spore suspension of toxigenic fungal species of Aspergillus flavus and a non toxigenic species ...
Suraruksa B - - 2003
With an aim to shorten start-up time of an Anaerobic Hybrid Reactor (AHR), initial biofilm development was studied, particularly at different upflow feeding velocities. At a low (0.01 m x h(-1)) upflow velocity, initial biofilm was found to develop via the attachment of suspended biomass in the packed zone, while ...
Yilmaz G - - 2003
The aim of this study was to develop an appropriate operating strategy for ammonia removal of young landfill leachate in a lab-scale sequencing batch reactor, SBR. SBR was operated at five different phases by changing the aerobic cycle time and external carbon source during the denitrification process. SBR provides the ...
Weinstein M - - 2003
The ratio of peak 3 to the sum of peaks 4 + 5 in TLD-100 was measured for various pre-irradiation and post-irradiation time periods, under conditions characteristic of routine personal dosimetry. It was confirmed that the value of this ratio depends only on the elapsed time between the prior readout ...
Abis K L - - 2003
Three pilot-scale facultative ponds were constructed at Esholt wastewater treatment works in Bradford, West Yorkshire, UK. The ponds were operated in parallel to test the effect of surface BOD loading on performance and the maintenance of facultative conditions. The performance criteria adopted were BOD, SS and ammonia removal. The criterion ...
Headley T R - - 2003
The phosphorus (P) removal processes in two pairs of High and Low Loaded reed beds were investigated during five periods within a 27-month study. The uptake/release of P was measured in seven mass balance compartments. With the exception of the first year of operation, the reed beds consistently removed over ...
Dourado Doroty M - - 2003
BACKGROUND AND OBJECTIVES: Viper snake envenoming induces in the victims systemic coagulopathy, and severe local tissue damage such as edema, hemorrhage, intense pain, and myonecrosis. Serumtherapy and other first-aid managements are ineffective in neutralizing these local effects. The effects of the gallium-arsenide (Ga-As) laser irradiation on mice gastrocnemius injected intramuscularly ...
Nuutinen Juha-Pekka - - 2003
The aim of this study was to evaluate the effect of the radiopaque filler, barium sulfate (BaSO4), on the mechanical properties of self-reinforced bioresorbable fibres. The bioresorbable polymer was a copolymer of L- and D-lactide with an L/D monomer ratio of 96:4 (96L/4D PLA). The fibres were manufactured using an ...
Barlow Ashley - - 2003
OBJECTIVE: A randomized, examiner-blind parallel design study was conducted to evaluate the clinical efficacy and tolerability of two brush-applied, peroxide-based tooth whiteners. METHODOLOGY: A total of 38 subjects were randomized to Colgate Simply White, an 18% carbamide peroxide paint-on liquid in an applicator bottle, or Crest Night Effects, a 19% ...
Evans R A - - 2003
As part of a study examining the efficacy of high-rate algal pond treatment of high-strength abattoir wastewater, the oxygen dynamics of a pilot scale system were characterised. The relationship between photosynthesis and irradiance was investigated using online data collected throughout a year of operation under varying conditions of climate and ...
Farahbakhshazad N - - 2003
Mechanisms for P removal in a vertical upflow macrophyte system were studied in controlled laboratory columns filled with sand and planted with Phragmites australis. Substrate P removal was shown to increase with flow rate, a parameter which can be enhanced through effluent recirculation. An alternative substrate (leca, light expanded clay ...
Nussbaum Ethne L - - 2002
OBJECTIVE: To examine the effects of low-intensity laser therapy (LILT) on bacterial growth in vitro. BACKGROUND DATA: LILT is undergoing investigation as a treatment for accelerating healing of open wounds. The potential of coincident effects on wound bacteria has received little attention. Increased bacterial proliferation could further delay recovery; conversely ...
Cronin Matthew J - - 2002
PURPOSE: To compare the safety and efficacy of two recently introduced modern power toothbrushes with different characteristics. MATERIALS AND METHODS: This was a single-blind, randomized, crossover study which compared the ability of two power toothbrushes to remove plaque during a 2-minute brushing period. The two brushes were the Braun Oral-B ...
Morana Alessandra - - 2002
S-adenosyl-L-methionine (SAM), an important metabolic intermediate of mammals, is a well-known therapeutic agent. The molecule is chemically unstable, both in solution and in dry state, and forms different degradation products. Because the chemical instability represents a real problem during the preparation of therapeutic formulations, we investigated the capacity of some ...
Angenent Largus T - - 2002
Changes in methanogenic population levels were followed during startup of a full-scale, farm-based anaerobic sequencing batch reactor (ASBR) and these changes were linked to operational and performance data. The ASBR was inoculated with anaerobic digester sludge from a municipal wastewater treatment facility. During an acclimation period of approximately 3 months, ...
Fitch Mark W - - 2002
A polysulfone microporous membrane module was investigated for control of 1-butanol-contaminated gas streams. A diurnal loading condition, using two different butanol concentrations, was used to simulate start-up and stop conditions associated with shift work. The membrane module was also used to remove 1-butanol from air under continuous loading conditions in ...
Muhonen Arja - - 2002
[18F-]fluoride positron-emission tomography (PET) was used to assess bone formation during mandibular distraction osteogenesis. There were three study groups: irradiation, irradiation+hyperbaric oxygen and control. The two experimental groups received a tumoricidal dose of irradiation to the mandible, and one group was also given hyperbaric oxygen (2.5 ATA (atmospheres absolute) for ...
Veeresh Mangala - - 2002
Influent and final effluent was collected from the CMM Ltd., Bethora, Ponda, Goa and were analysed for pH, DO, BOD, enzyme activity and chlorophyll content of the waste stabilization pond for over a period of two years of which the data for one year (pre monsoon, monsoon and post monsoon ...
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