Search Results
Results 401 - 450 of 627
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Schmage P - - 1999
OBJECTIVE: The aim of this study was to compare the effectiveness of the automated Interclean Interdental Plaque Remover with that of interdental brushes and Ultrafloss. METHOD AND MATERIALS: The interdental hygiene effectiveness of 35 healthy patients suffering from gingivitis was studied by an examiner daily over a period of 1 ...
Bandhyopadhyay K - - 1999
Characterization studies of calcium alginate beads with encapsulated Pseudomonas putida MTCC 1194, used for the biodegradation of phenol, were carried out to investigate the reactivity, reusability and structural strength of the solid matrix. Various techniques were employed to improve the structural stability of the immobilized solid necessary for its use ...
Stuart D M - - 1999
Aspergillus oryzae ACM 4996 was grown on an artificial gel-based substrate and on steamed wheat bran during solid-state fermentations in 18.7 L rotating drum bioreactors. For gel fermentations fungal growth decreased as rotational speed increased, presumably due to increased shear. For wheat bran fermentations fungal growth improved under agitated compared ...
Chang B V - - 1999
The dechlorination of 2,4,6-trichlorophenol (TCP) in municipal sewage sludge with a chlorophenol (CP)-adapted consortium was investigated. Results show that dechlorination rates differed according to the source of the sludge samples used in the batch experiments. No significant differences in 2,4,6-TCP dechlorination were observed following treatment with inoculum at densities ranging ...
McKellop H A - - 1999
Orthopaedic surgeons must currently choose from several types of ultra high molecular weight polyethylene acetabular cups that differ in their material properties and in the methods used for their sterilization. Information on the wear resistance of these different cups may help in the selection process. This study included two separate ...
Bønløkke L - - 1999
AIM: The primary objective of this study was to investigate the in vivo dissolution of carbamazepine in humans and to compare it with the dissolution estimated by deconvolution of plasma concentrations as well as the in vitro dissolution. METHODS: The in vivo study included six healthy volunteers, and consisted of ...
Slanina J - - 1999
The end products of atmospheric degradation are not only CO2 and H2O but also sulfate and nitrate depending on the chemical composition of the substances which are subject to degradation processes. Atmospheric degradation has thus a direct influence on the radiative balance of the earth not only due to formation ...
Wolff M S - - 1999
The antisialogogue, ammonium glycopyrrolate (Robinul), was used to reduce the salivary flow rate in healthy individuals with normal salivary function to determine whether the dry-mouth symptoms and reduced amounts and patterns of oral mucosal wetness found previously in hyposalivators could be induced by this means. After baseline measurements, the drug ...
Moroff G - - 1999
BACKGROUND: Irradiation has been shown to adversely affect both in vivo 24-hour recovery (recovery [%]) and in vitro properties of stored red cells (RBCs). There is uncertainty as to how these changes are related to the day of irradiation and the length of storage after irradiation. STUDY DESIGN AND METHODS: ...
Chan C - - 1999
A microbial biosensor based on the yeast Arxula adeninivorans LS3 has been developed for measurement of biodegradable substances. Arxula is immobilized in the hydrogel poly(carbamoyl) sulfonate (PCS). The immobilized yeast membrane is placed in front of an oxygen electrode with -600 mV versus Ag/AgCl. Arxula is salt tolerant; it can ...
Stüben G - - 1999
The effect of fractionated irradiation on the oxygenation status of experimental tumours was investigated using polarographic assessment of the pO2 distribution. Since an improvement in tumour oxygenation could simply be the result of tumour shrinkage, a comparison of pO2 readings of untreated size-matched control tumours was performed. Irradiation was carried ...
Sharma N - - 1999
The objective of this double-blind clinical study was to compare the extrinsic tooth stain removal efficacy of three commercially available dentifrices: Colgate Platinum Whitening Toothpaste with Fluoride, Aquafresh Advanced Whitening Toothpaste with Fluoride, and Crest Regular Fluoride Toothpaste. Following a baseline examination for extrinsic tooth stain, qualifying adult male and ...
Usman S - - 1999
Environmental radon (222Rn) monitors that incorporate electret detectors are confounded by background gamma radiation, which may cause the electret to discharge by as much as 7.5 volts per mR. Although background gamma corrections were formerly made by multiplying the known background gamma exposure rate with a constant conversion factor, this ...
Montanari L - - 1998
Gamma radiation treatment plays an increasingly important role in the sterilization/sanitization of pharmaceutical products. However, irradiation may affect the stability of the product and thus its safety of use. We investigated the influence of ionizing radiation on modified release microparticulate drug delivery systems made of two types of polylactide-co-glycolide copolymers ...
Erbil Y - - 1998
Increase in intraluminal bacterial count, disruption of the mucosal integrity, changes in intestinal immunity and transit time are the factors involved in bacterial translocation. The relationship between intestinal transit time, intra luminal bacterial count and translocation rate were investigated in 40 Wistar-albino rats. The study was conducted in 4 groups ...
Tongiorgi E - - 1998
This report describes a quick and versatile method to perform non-radioactive in situ hybridization in which none of the hybridization steps are performed under RNAse-free conditions. This study demonstrates that in situ hybridization can be performed without an RNAse-free environment provided that the concentration of RNAse introduced during the experiment ...
Pitts B - - 1998
Laboratory reactors fitted with removable ceramic porcelain growth surfaces were inoculated with a consortium of biofilm forming environmental isolates. A Minolta colorimeter CR-200 (Minolta Camera Co., Ltd, Ramsey, NJ) was used in conjunction with a specially designed adapter to evaluate the reflective color of the porcelain disks as biofilm accumulated ...
Timmer L W - - 1998
ABSTRACT Alternaria brown spot, caused by Alternaria alternata pv. citri, affects many tangerines and their hybrids, causing loss of immature leaves and fruit and reducing the marketability of the remaining fruit. Conidial production of A. alternata was greatest on mature leaves moistened and maintained at near 100% relative humidity (RH) ...
Ilyin S E - - 1998
This report describes how certain modifications of the Ribonuclease (RNase) protection assay may increase its efficiency by decreasing the time and cost of the procedure without compromising reliability. We show that, under the experimental conditions tested, the RNA samples can be precipitated by a solution of Tri Reagent in ethanol ...
Xie H - - 1998
OBJECTIVE: The aim of this study is to identify the nature of the IL-8 inhibitor(s) in gingival crevicular fluid (GCF). METHODS: Part 1: Fourteen GCF samples were collected from 13 adult periodontitis (AP) patients, and 9 samples were taken from 8 healthy subjects. Each GCF sample was divided into two ...
Sela M O - - 1998
The aim was to investigate the effect of honey on the microhardness of enamel in normal and xerostomic patients. Normal subjects and patients who were xerostomic after neck irradiation, wearing prosthetic appliances with slabs of human enamel inserted, were asked to consume a single teaspoonful of pure honey, pH 3.9. ...
Gregory R L - - 1998
PURPOSE: Streptococcus mutans has been implicated as the major causative agent of dental caries. Although restorative treatment for caries is thought to temporarily eliminate the carious challenge, there are few reports of alterations in salivary mutans streptococci (MS) numbers and no reports of changes in salivary IgA antibody to S. ...
Steinle P - - 1998
A new aerobic bacterium was isolated from the sediment of a freshwater pond close to a contaminated site at Amponville (France). It was enriched in a fixed-bed reactor fed with 2,6-dichlorophenol (2,6-DCP)as the sole carbon and energy source at pH 7.5 and room temperature. The degradation of 2,6-DCP followed Monod ...
Bremer P J - - 1998
A trial industrial-scale fin-fish washing system was assessed for its effectiveness in removing bacteria associated with the skin of gilled and gutted king salmon (Oncorhynchus tshawytscha). Exposure of the salmon to 200 ppm free chlorine at a turnover rate for the total volume of the wash solution of 2.25 cycles ...
Ennahar S - - 1998
The anti-Listeria monocytogenes activity of Lactobacillus plantarum WHE 92, a pediocin AcH producer, was investigated in Munster cheese, a smear-surface soft cheese. The appearance of L. monocytogenes in the cheese, which naturally occurs solely in the crust and never before 1 week of ripening, could be prevented by spraying a ...
Suido H - - 1998
The purpose of this study was to assess the effectiveness of a chlorhexidine coating on the nylon filaments of an interdental brush in reducing bacterial contamination from actual clinical usage. In addition, the residual antimicrobial capacity of the coating over time from clinical exposure was studied. The same type of ...
Gerlach R W - - 1998
This randomized and controlled, examiner blind, parallel group study was undertaken to evaluate the efficacy of three commercial dentifrices on breath malodor. A total of 384 healthy adult subjects with oral malodor were randomized to one of four brushing groups, using either an antimicrobial dentifrice containing 0.45% stannous fluoride, an ...
Busscher H J - - 1998
Biofilm formation on indwelling silicone rubber voice prostheses in laryngectomized patients is still the main reason for dysfunction of the valve, leading to frequent replacements. Within patient support groups in The Netherlands, laryngectomees have suggested that the consumption of buttermilk prolongs the life-time of indwelling silicone rubber voice prostheses. The ...
Lowe A S - - 1998
BACKGROUND AND OBJECTIVE: The use of low intensity laser and monochromatic light diodes as a therapeutic modality has become popular in a variety of clinical applications, including the promotion of wound repair. Despite this, the clinical evidence base for such application remains sparse; in contrast, recent studies have demonstrated a ...
Hellström S - - 1997
The round-window membrane (RWM) is extremely thin and is the only soft-tissue barrier between the middle ear and the inner ear. Under inflammatory conditions of the middle ear the various layers of the triple-layered RWM undergo characteristic changes parallel to the changes of the middle-ear mucosa. Several studies report that ...
Buchtmann C - - 1997
Quinoline degradation by Comamonas acidovorans was investigated in a three phase fluidized bed reactor at dilution rates below and above the critical value (micro(max) = 0.42 h(-1)). Quinoline was used as the sole source of carbon, nitrogen, and energy. Two attachment carriers, polyurethane foam (Bayvitec) and modified cellulose (Aquacel), and ...
Saxer U P - - 1997
The new generation of manual and powered toothbrushes that have been tested in recent years exhibit better plaque removal than do older brushes. Differences are most significant when individuals have been instructed in proper brushing technique. Comparisons of powered and manual brushes show the clear superiority of newer powered brushes, ...
Heemken R - - 1997
The peritoneal cavity can be divided in the supracolic infracolic and paracolic spaces, the lesser sack and the pelvis. The peritoneum is a semipermeable membrane which allows a flux of solutes into and from the peritoneal cavity. In addition, particles can be absorbed through the stomata of the diaphragmatic peritoneum. ...
Hatibovic-Kofman S - - 1997
It is well established that glass ionomers (GI) release fluoride (F). The degree of F released depends on the physical and chemical properties of the product. In the present study the fluoride release and the capacity of the GI to be recharged with fluoride was tested for five different brands: ...
Haffajee A D - - 1997
The purpose of the present investigation was to examine the effect of SRP on clinical and microbiological parameters in 57 subjects with adult periodontitis (mean age 47 +/- 11 years). Subjects were monitored clinically and microbiologically prior to and 3, 6 and 9 months after full-mouth SRP under local anaesthesia. ...
van Benthum W A - - 1997
A Biofilm Airlift Suspension (BAS) reactor was operated with nitrifying biofilm growth and heterotrophic suspended growth, simultaneously converting ammonium and acetate. Growth of heterotrophs in suspension decreases the diffusion limitation for the nitrifiers, and enlarges the nitrifying capacity of a biofilm reactor. Neither nitrifiers nor heterotrophs suffer from additional oxygen ...
Roméro-Graillet C - - 1997
Ultraviolet (UV) radiation is the main physiological stimulus for human skin pigmentation. Within the epidermal-melanin unit, melanocytes synthesize and transfer melanin to the surrounding keratinocytes. Keratinocytes produce paracrine factors that affect melanocyte proliferation, dendricity, and melanin synthesis. In this report, we show that normal human keratinocytes secrete nitric oxide (NO) ...
Griffiths G S - - 1997
Changes in the permeability of the underlying vasculature of the gingival crevice region may occur either as part of an inflammatory response during gingivitis or as a response to trauma during collection of gingival crevicular fluid IgM was selected as a marker of permeability and the concentration in gingival crevicular ...
Tzaphlidou M - - 1997
The structure of mouse skin collagen fibrils after treatment with 0.5, 1 and 2.5 Gy gamma-irradiation was studied by electron microscopy. Animals were sacrificed 1, 4 and 8 weeks after irradiation. Although there were areas where the normal parallel packing of fibrils was retained in some regions packing was interrupted ...
Shibly O - - 1997
The objective of this 60-day single-blind, parallel trial, using 150 subjects, was to evaluate the effect of a 20% sodium bicarbonate dentifrice, a 1.5% hydrogen peroxide solution and a mouth moisturizer on oral tissues and microflora. Subjects were randomly assigned to one of five groups. The treatments were: 1) Sage ...
Pérez M - - 1997
This paper reports and discusses a laboratory experiment that tested the anaerobic fluidized bed (AFB) technology as a means for the treatment of concentrated industrial wastewater (wine distillery, vinasses) at thermophilic conditions. The purposes were to operate and characterize AFB under high organic loading conditions and to report on their ...
Radford J R - - 1997
OBJECTIVES: The aims of this study were to examine the effect of the use of a mouthwash containing 0.05% cetylpyridinium chloride (CPC) on (1) the composition of the normal oral microbial flora and (2) the establishment of non-oral bacterial species in the mouth. METHOD: In a double-blind study, 129 subjects ...
Rukunga G M - - 1996
The CH2Cl2 extract of the stem bark of Albizia gummifera yielded four macrocyclic spermine alkaloids (budmunchiamines), three of them being new analogues. On the basis of spectral analysis and comparison with related compounds they were identified as budmunchiamine G (1) and the new analogues budmunchiamine K (2), 6'xi-hydroxybudmunchiamine K (3), ...
Polson A M - - 1996
A biodegradable drug delivery system containing 5% sanguinarium (Sa) was compared to vehicle control (VC), scaling and root planing (SRP), and supragingival plaque control (SPC) in the treatment of adult periodontitis in 2 well-controlled clinical trials. Studies were 4-quadrant (split mouth) designs at 2 centers each, having 94 (Study A) ...
Van der Weijden F A - - 1996
PURPOSE: To test the plaque removing efficacy of three different toothbrushes in relation to duration of toothbrushing. MATERIALS AND METHODS: The brushes studied were the Sonicare, the Braun Plak Remover (D7), and a modified Plak Control with increased speed (D9). Part 1 of the study was divided into four experiments ...
Fine D H - - 1996
In this controlled clinical study, the authors examined the effect of subgingival irrigation and rinsing with an antiseptic mouthrinse before ultrasonic scaling of a quadrant containing inflamed gingivae. The results showed that pre-procedural subgingival irrigation and rinsing can significantly reduce the level of bacteremia associated with ultrasonic scaling. These results ...
Tanner A - - 1996
Thirteen periodontally healthy subjects were monitored clinically for 6-12 months. Clinical measurements at 6-weekly intervals included duplicate PD measurements, presence of plaque, redness, and bleeding on probing. Baseline measurements consisted of 2 visits 1 wk apart. Microbial samples were taken from 11 of the subjects who had completed at least ...
Henskens Y M - - 1996
Cystatins are physiological inhibitors of cysteine proteinases and widely distributed in human tissues and fluids including saliva. Cystatins S, SA, SN, and D are only found in glandular saliva and tear fluid whereas cystatin C has been detected in all tested biological fluids. Previous studies demonstrated that total cystatin activity ...
Chang S F - - 1996
IM meat products are produced by lowering the aw to 0.90 to 0.60. Such products are stable at ambient temperature and humidity and are produced in nearly every country in the world, especially in developing areas where refrigeration is limited or unavailable. Traditionally IM meats use low cost sources of ...
Stabholz A - - 1996
A clinical study was carried out in an attempt to assess the efficacy of a newly designed electric toothbrush compared to a conventional manual toothbrush using the American Dental Association's protocol for evaluating toothbrushes. An Oral-B 35 manual toothbrush, which served as the control, was compared to the Plaq & ...
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