Sökresultat
Filtrera
Filtyp
Din sökning på "*" gav 530634 sökträffar
International Standard reagents for harmonization of HPV serology and DNA assays - an update
International reference materials such as International Standard reagents facilitate quality assurance of essential biopharmaceutical products and related in vitro diagnostic tests. Standardization of antibody and DNA measurements and harmonization of laboratory procedures are key to the success of cancer prevention strategies through screening methods as well as for development and implementation
Attefal Dosin® -a new pump device. Its construction and function
The cyclic flow of the Dosin((R)) is useful in interventional radiology since it prevents clotting and increases the mixing with the blood. The flow rate varies from 0.03 mL/s to 5 mL/s and it is recommended to use fluid with a viscosity lower than 3 mPa.s. The outlet pressure is recommended below 300 mm Hg. The Dosin((R)) must be replaced after each patient, alternatively after maximum 24h contin
How did Saccharomyces evolve to become a good brewer?
Brewing and wine production are among the oldest technologies and their products are almost indispensable in our lives. The central biological agents of beer and wine fermentation are yeasts belonging to the genus Saccharomyces, which can accumulate ethanol. Recent advances in comparative genomics and bioinformatics have made it possible to elucidate when and why yeasts produce ethanol in high con
Degradation of low density polyethylene during extrusion. III. Volatile compounds in extruded films creating off-flavor
This study was aimed at finding a correlation between the experienced off-flavor in packaged foods and the presence of specific degradation products in PE packaging films. The possibility to trap degradation products by chemical reactions with scavengers, that is, zeolites and maleic anhydride grafted LLDPE, were investigated. This trapping would prevent the degradation products from migrating to
Coated formulations: New insights into the release mechanism and changes in the film properties with a novel release cell.
The effect of the blend ratio of water-insoluble ethyl cellulose (EC) and water-soluble hydroxypropyl cellulose (HPC-LF), on the properties of sprayed films and on the drug release mechanism of formulations coated with the material was investigated. When the original HPC-LF content exceeded 22%, both the amount of HPC-LF leached out and the water permeability of the films increased drastically whe
c-myc amplification is an independent prognostic factor in postmenopausal breast cancer
The c-myc proto-oncogene was analyzed in 311 cases of primary breast cancer, in 8% of which it was found to be amplified, usually at moderately increased copy number (2-5 copies). The adjacent pvt gene was co-amplified with c-myc in all tumors analyzed. C-myc amplification was significantly correlated to a high S-phase fraction and to amplification of the c-erbB-2 proto-oncogene. Weak relationship
Arabidopsis genes encoding mitochondrial type II NAD(P)H dehydrogenases have different evolutionary orgin and show distinct responses to light.
In addition to proton-pumping complex I, plant mitochondria contain several type II NAD(P)H dehydrogenases in the electron transport chain. The extra enzymes allow the nonenergy-conserving electron transfer from cytoplasmic and matrix NAD(P)H to ubiquinone. We have investigated the type II NAD(P)H dehydrogenase gene families in Arabidopsis. This model plant contains two and four genes closely rela
Syntheses and fluxional processes of diphenyl(2-thienyl)phosphane derivatives of triosmium clusters
Thermal treatment of [OS3(CO)(12)] with diphenyl(2-thienyl)phosphane, Ph(2)p(C4H3S), results in the formation of [Os-3(CO)(12-x){Ph2P(C4H3S)}(x)] (x = 1-3, 1-3), but no C-H bond activation was observed. Reaction of [H2Os3(CO)(10)] with diphenyl(2-thienyl)phosphane at ambient temperature affords [HOs3(mu-H)(CO)(10){Ph2P(C4H3S}] (4), but when the same reaction is repeated at elevated temperatures, t
Capillary density in patients with systemic sclerosis, as determined by microscopy counts and compared with computer-based analysis
OBJECTIVE: To develop a method enabling capillary density to be determined rapidly and accurately in patients with systemic sclerosis.METHOD: Capillary density was determined in 11 controls and 22 patients: 5 with diffuse cutaneous systemic sclerosis (dSSc), 12 with limited cutaneous systemic sclerosis (lSSc), two with suspected systemic sclerosis (suspSSc), 2 with sclerodermatomyositis, and one w
Videomanometric analysis of supraglottic swallow, effortful swallow, and chin tuck in healthy volunteers
Simultaneous videoradiography and solid-state manometry (videomanometry) was applied in eight healthy volunteers (four women, four men; age range 25-64 years, mean age 41 years) without swallowing problems. Three different swallowing techniques were tested; supraglottic swallow, effortful swallow, and chin tuck. Seven videoradiographic variables and six manometric variables were analyzed. The supr
Climate - How unusual is today's solar activity?
Heterogeneous integration of InAs on W/GaAs by MOVPE
InAs has been grown on W-GaAs patterned substrates using MOVPE. The selectivity of the growth and the nucleation process has been studied as a function of the temperature and the V/III-ratio in the MOVPE reactor. It is shown that the W guides the nucleation of the InAs on the GaAs and that the islands formed may be used to embed metal features in a hybride InAs/GaAs structure in agreement with pre
Optimisation of an SOFC/GT system with CO2-capture
Hybrid systems combining solid oxide fuel cells and gas turbines (SOFC/GT) have been extensively studied in recent years. They show very high theoretical electrical efficiencies and are considered as prime contenders for distributed generation. The addition of a CO2-capture system could make them even more attractive from an environmental perspective. In this study, a SOFC/GT configuration with an
Treatment of dysphagia improves nutritional conditions in stroke patients
Dysphagia is a common symptom in stroke patients, and malnutrition is prevalent among these patients. Thus far, nutritional effects of dysphagic treatment have not been evaluated. The aim of the present report was to study the effects of swallowing techniques on nutritional and anthropometric variables. A survey with follow-up was performed at the Departments of Geriatric Medicine and Neurology, M
Deceased, disabled or depressed - a population-based 6-year follow-up study of elderly people with depression
The prognosis of depression in elderly people is reported as poor, with high mortality and high rate of non-recovery. The aim of this study was to investigate the outcome after 6 years in a broader perspective. In addition to the risk of dying, we also estimated the risk of moving to long-term care, and having a depression in a re-screening event after 6 years. In 1993, a screening event for depre
Development of wide-pore CLEAR supports for applications involving biological macromolecules.
The CLEAR supports were originally developed for solid-phase synthesis. In this study, two wide-pore versions of the resins were prepared by radical suspension polymerization using toluene as the porogen. Trimethylolpropane ethoxylate (14/3 EO/OH) triacrylate was used as the cross-linking agent. Resins of two different porosities were synthesized. The permeability to biological macromolecules was
Gel formation in mixtures of hydrophobically modified potato and high amylopectin potato starch
The rheological properties of gels of hydrophobically modified potato starch (HMPot) and high amylopectin potato starch (HAPP) were studied by small deformation oscillatory rheometry. The hydrophobic modification consisted of octenyl succinate anhydride (OSA) chains grafted mainly on the amylopectin molecules. The theological behaviour of HMPot was different from the behaviour of native potato sta
Economic evaluation of isolation of hemicelluloses from process streams from thermomechanical pulping of spruce
Hemicelluloses, which are abundant in nature and have potential use in a wide variety of applications, may make an important contribution in helping relieve society of its dependence on petrochemicals. However, cost-efficient methods for the isolation of hemicelluloses are required. This article presents an economic evaluation of a full-scale process to isolate hemicelluloses from process water fr
The Central Scandinavian Dolerite Group - Protracted hotspot activity or back-arc magmatism? Constraints from U-Pb baddeleyite geochronology and Hf isotopic data
The Central Scandinavian Dolerite Group (CSDG) occurs in five separate complexes in central Sweden and SW Finland. U-Pb baddeleyite ages of dolerite dikes and sills fall into three age intervals: 1264-1271 (the Dalarna complex), 1256-1259 (the Vdsterbotten-Ulvo-Satakunta complexes) and similar to 1247 Ma (the Jamtland complex). Timing and spatial distribution of CSDG are unlike expressions of the