Search results for " LAB"

Dimethylsulfoxide as carrier in enzyme cytochemistry.

1971

Addition of dimethylsulfoxide (DMSO) to the incubation medium of succinate dehydrogenase in a concentration of 10% enhances the staining reaction in the hyphae of the fungus Cercosporella herpotrichoides after an incubation period of 15 min. Controls without DMSO remain unstained. DMSO causes a rapid penetration of the components of the medium through the mucilage that covers the hyphae.

Protection of Social Rights as a Permament Challenge for the European Union

2021

Social rights protection in the European Union has undergone significant development. Currently their protection is regulated by relevant treaty provisions and the Charter of Fundamental Rights (Charter), both of a primary law nature, as well as by the non-binding European Pillar of Social Rights (Pillar). The aim of the paper is the assessment of the social rights protection in the EU, and whether all social rights provided in the CFR have their counterparts in the EPSR, hence whether and in what way the EPSR assists the actual exercise of social rights provided by the CFR. Comparing the content of the above-mentioned legal instruments makes it possible to answer the question whether all s…

High-performance and ion-exchange chromatography and chromatofocusing of the human uterine progesterone receptor: its application to the identificati…

1984

Two independent lines of evidence were used to identify the human uterine progesterone receptor. First, three differently tritiated progestogens (Org 2058, R 5020, progesterone) were used for reversible labelling of the receptor. Secondly, the highly potent affinity label 21-[3H]dehydro Org 2058 was used to label covalently the steroid-specific binding site of the receptor. The labelled cytosols were chromatographed on a Mono Q high-performance anion-exchange column in the absence or presence of a high molar excess of the respective unlabelled competitor steroids. In the case of 21-[3H]dehydro Org 2058, Org 2058 was used as the unlabelled competitor. After elution with a NaCl gradient, the …

Acute Toxicity Testing in Vitro and the Classification and Labelling of Chemicals

1996

Kinetics and equilibrium in insulin radioimmunoassay.

2002

The kinetics of insulin reaction has been studied with its specific antibody immobilized on the inner wall of the reaction tube; the radioimmunoanalytical determination of such a substance is based on the reaction. Independent variables were labelled and unlabelled insulin concentrations, temperature, viscosity, and the medium's ionic strength. Biexponential kinetics was found to be dependent on the concentrations fitted to the models discussed in the paper. The effect of temperature shows activation parameters similar to the viscous flow energy of water, which suggests that the reaction is diffusion-controlled. The results of the viscosity analysis points at the clearly negative influence …

Site-Specific Information on Membrane Protein Folding by Electron Spin Echo Envelope Modulation Spectroscopy

2010

Compared to folding of soluble proteins, folding of membrane proteins is complicated by the fact that it requires an amphiphilic environment. Few existing techniques can provide structurally resolved information on folding kinetics. For the major plant light harvesting complex LHCII, it is demonstrated that changes in water accessibility of a particular amino acid residue can be followed during folding by measuring the hyperfine interaction of spin labels with deuterium nuclei of heavy water. The incorporation of residue 196 into the hydrophobic core of a detergent micelle was investigated. The technique provides a time constant that is similar to the one found with fluorescence spectroscop…

Soil Carbon, Nitrogen and Phosphorus Dynamics as Affected by Solarization Alone or Combined with Organic Amendment

2006

Soil solarization, alone or combined with organic amendment, is an increasingly attractive approach for managing soil-borne plant pathogens in agricultural soils. Even though it consists in a relatively mild heating treatment, the increased soil temperature may strongly affect soil microbial processes and nutrients dynamics. This study aimed to investigate the impact of solarization, either with or without addition of farmyard manure, in soil dynamics of various C, N and P pools. Changes in total C, N and P contents and in some functionally-related labile pools (soil microbial biomass C and N, K2SO4-extractable C and N, basal respiration, KCl-exchangeable ammonium and nitrate, and water-sol…

Profiling of RNA modifications by multiplexed stable isotope labelling

2014

The combination of (15)N/(13)C stable isotope labelling (SIL) and LC-MS/MS revealed a total of 52 modifications in RNA from E. coli and yeast, including 10 previously undescribed modifications. Two modifications, N-ribosylnicotinamide and 2-methylthioadenosine, were newly detected in species hitherto thought not to contain these modifications.

Intimate male partner violence impairs immune control over herpes simplex virus type 1 in physically and psychologically abused women.

2004

OBJECTIVE: Intimate partner violence (IPV) against women is a worldwide problem and a cause of significant distress and threat to health. Studies have focused mainly on mental health, and few have considered the effect on physiological systems. The aim of this research was to determine whether IPV also compromises the immune system, as evidenced by a decrease in immune regulation over herpes simplex virus type 1 (HSV-1), the latent virus that causes cold sores. METHODS: Physically abused (N = 47) and psychologically abused women (N = 27) were compared with nonabused control women (N = 37). Information about sociodemographic characteristics, lifetime history of victimization, and mental heal…

Childhood Adversities and Adult Headache in Poland and Germany.

2015

Objective Various childhood adversities have been found to be associated with chronic pain in adulthood. However, associations were moderate in most studies, i.e. odds ratios (OR) were between one and two. Method An internet survey was performed in 508 Polish and 500 German subjects. A total of 19 childhood adversities were selected and their associations with headaches explored. Age, gender and country were included as potential confounders, as well as their two-way interaction with the risk factors. Results Two strong risk factors were identified. (1) A combined score for physical and emotional neglect showed an odds ratio (OR) of 2.78 (p < .002) to the frequency of headache in adulthood …