Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0040822 (tremor)
 18,428 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Softness and flexibility of PVC are due to the addition of plasticizers in high concentration; the most used of them for blood storage bags is DEHP. In this work, a method for labelling DEHP with 14C from 14C phtalic anhydrid is given. A piece of PVC from a commercial blood bag is labelled, in our laboratory, with 14C DEHP and used to follow the kinetics of DEHP leaching in blood during storage. It is also used to study the influence of some parameters such as lipids amount of blood, shaking, and plastic sterilisation on this leaching. DEHP leaching is a three steps phenomenon and the level is not correlated to lipids content of blood. Thermal treatment of PVC and shaking have an influence on leaching. DEHP is not metabolised during blood storage at 4 degrees C and can not be detected as free molecule; it is absorbed on plasmatic proteins.
Rev Fr Transfus Immunohematol 1979 Sep
PMID:[Release of diethyl-2-hexyl phthalate from stored blood on contact with polyvinyl chloride]. 53 92

We present a patient 52 years old with a symtomatology of three month's evolution with: rapid weight loss, weakness in legs fasciculated tremor increased by any physical effort, nervousness and anxiety. The isotopic exploration of thyroid in basal conditions and after estimulation with TSH shows a very small captation of iodide. The determination of T 4 shows a notable increase (24 U. U. Normal range is 7,5 to 10,5 U. U.). The clinical symtomatology biochemical and gammagraphic datum support the diagnostic of subacute thyroiditis and also the posterior evolution of symtomatology in spite of the absence of odynophagia and the increase of syze of the thyroid. We comment on the particularity of this clinical entity that could be confused with thireotoxicosis because of its atypical character of presentation.
Rev Med Univ Navarra 1979 Sep
PMID:[A clinical report. Atypical subacute thyroiditis]. 55 34

The ethanol withdrawal syndrome in man and animals is characterized by signs of CNS hyperactivity although a direct measurement of a physiological variable reflecting this CNS hyperactivity has never been performed in untreated man or in animals. We induced ethanol dependence in the rat by means of intragastric intubation with a 20% w/v ethanol solution, thus keeping the animals in a state of continuous severe intoxication for 3--4 days; during the subsequent state of withdrawal characterized by tremor, rigidity, stereotyped movements and general seizures a 25% increase in cerebral oxygen consumption (CMRO2) could be measured; this increase was not due to catecholamines originating from adrenal medulla as adrenomedullectomized animals showed a similar increase in CMRO2 (28%); the withdrawing animals showed a corresponding cerebral blood flow (CBF) increase. The elevated CMRO2 and CBF could be reduced to normal by administration of a beta-adrenergic receptor blocker (propranolol 2 mg/kg i.v.), and hence the increased CMRO2 during ethanol withdrawal could be related to catecholaminergic systems in the brain, e.g. the noradrenergic locus coeruleus system which is anatomically well suited as a general activating system. This interpretation is supported by the earlier neurochemical finding of an increased cerebral noradrenaline turnover during ethanol withdrawal. The exact mechanism underlying the increased cerebral oxygen consumption during ethanol withdrawal and the effect of propranolol on cerebral function during this condition remains to be clarified.
Brain Res 1979 Sep 14
PMID:Cerebral blood flow and oxygen consumption during ethanol withdrawal in the rat. 57 52

In a community of potters in Barbados where lead glazes traditionally have been used, a survey of 12 potters, 19 of their family members, and 24 controls revealed elevated blood lead levels in the potters, their family members, and the neighbours who used pottery for culinary purposes. Dust from the potters' homes and work areas contained lead in concentrations up to 320,000 ppm. Pottery was found to have lead release levels up to 3,125 microgram/ml. Six people had upper extremity tremor associated with elevated blood lead levels. This survey demonstrates the risk of using lead glazes in pottery production to family members of potters as well as the potters themselves and emphasizes the need for surveillance of occupational hazards in developing countries.
Int J Epidemiol 1977 Sep
PMID:Lead Absorption in a community of potters in Barbados. 59 Nov 68

After receiving reports of lead poisoning in two workers at a secondary lead smelter, we evaluated the health status of 38 current smelter workers and 87 of their household contacts by questionnaires, physical examinations, and laboratory tests. Fatigue, cough, and diarrhea were the most frequent symptoms in plant employees; each occurred in at least a third. The most frequent physical finding, hand tremor, occurred in 10 of 33 plant employees. Twelve employees had blood lead concentrations at or above 80 microgram/100 ml, and 17 others had blood lead concentrations at or above 60 microgram/100 ml. All physical signs possibly due to excess lead absorption were manifested by employees with blood lead levels of 60 microgram/100 ml or greater, with one exception. Household contacts of employees had few symptoms suggestive of excess lead absorption.
J Occup Med 1977 Sep
PMID:Chronic occupational exposure to lead: an evaluation of the health of smelter workers. 59 90

In 3T3 Swiss mouse fibroblasts, incorporation of phosphate into cells and phosphorylation of small organic compounds were increased by shaking dense cultures. This response was not obtained with SV40 transformed Swiss 3T3 cells (SV-3T3). It appeared likely that these results could be accounted for by an inhibitor released from 3T3 cells but not from SV-3T3 cells. Our new method of co-incubation of sparse and dense cultures allowed us to demonstrate inhibition of growth and phosphate metabolism in sparse 3T3 cultures which were shaken in the presence of dense cultures. The inhibition was much less when the cultures were co-cultivated but not shaken. The inhibition of phosphate incorporation in acid-soluble and acid-insoluble fractions of sparse cultures was observed as early as 20 minutes of co-incubation in the presence of dense cultures, so this inhibition is not the result of depletion of growth factors in the medium. Our experiments suggest that an inhibitor(s) was released from dense cultures of 3T3 cells.
J Cell Physiol 1978 Sep
PMID:Diffusible factor(s) controlling density inhibition of 3T3 cell growth: a new approach. 67 Mar 14

The rate of denaturation of hemaglobin and other proteins by mechanical shaking is strongly affected by organic solvents. A group pf solvents,including alcohols and ketones, was found to stabilize proteins at low concentrations, although these same organic solvents denatured proteins at high concentrations. The stabilizing effect of alcohols increased with increasing chain lenghts. The second group of solvents, including toluene and chloroform, showed only a destabilizing effect, while the third group of solvents such as formamide and pentane had no effect over a wide range of concentrations. Organic solvents may be used to protect or denature a specific protein in solutions containing various proteins.
J Biol Chem 1978 Sep 25
PMID:Stabilizing effect of various organic solvents on protein. 68 59

A method permitting measurement of finger tremor as a displacement-time curve is described, using a test system with simple amplitude calibration. The coordinates of the inversion points of the displacement-time curves were transferred through graphical input equipment to punched tape. By means of a computer program, periods and amplitudes of tremor oscillations were calculated and classified. The event frequency for each class of periods and amplitudes was determined. The actions of fenoterol-hydrobromide, ritodrin-HCl and placebo given to 10 healthy subjects by intravenous infusion in a double-blind crossover study were tested by this method. At therapeutic doses both substances raised the mean tremor amplitude to about three times the control level. At the same time, the mean period within each class of amplitudes shortened by 10--20 ms, whereas the mean periods calculated from all oscillations together did not change significantly. After the end of fenoterol-hydrobromide infusion, tremor amplitudes decreased significantly faster than those following ritodrin-HCl infusion.
Eur J Appl Physiol Occup Physiol 1978 Sep 15
PMID:A method for the measurement of tremor, and a comparison of the effects of tocolytic beta-mimetics. 68 20

Intravenous infusion of oxotremorine, seduxene, and phentolamine to cats not only decreased the cold-induced tremor, but also reduced the subcutaneous vein receptor impulses. Diminished activity of the vascular thermoreceptors served as an additional component in the mechanisms of the inhibitory effect of oxotremorine and seduxene on cold tremor. Reduction of the thermoreceptors activity after phentolamine administration is primary, and may be considered as the leading factor in the cold tremor inhibition.
Biull Eksp Biol Med 1978 Sep
PMID:[Role of vascular thermoreceptors in the mechanism of cold tremor inhibition by oxotremorine, seduxen and phentolamine]. 69 77

Frequency variations in the human voice result from voluntary and involuntary changes in the parameters of the vocal system. The present work deals with involuntary frequency perturbations from two theoretical aspects: 1) the influence of pitch period variations on frequency changes in the band-limited signal which results from the resonant characteristics of the vocal tract; 2) the physiological parameters of the vocal system which are potentially able to govern involuntary frequency changes. It is shown that the modulation function of the vocal-cord wave can theoretically be derived from its harmonics using FM demodulation techniques, and that higher distortion may appear at higher harmonics. It is also shown that involuntary geometirical changes of the vocal tract and its terminal impedance as well as tension and initial-area changes of the vocal cord--changes well within the physiological range--can influence frequency changes in the human voice. The present results are correlated with our reported experimental findings on involuntary voice tremor, used in psychological stress evaluation. The role of the central nervous system, and possible mechanisms for these phenomena, are discussed.
Biol Cybern 1978 Sep 21
PMID:Physiological model analysis of involuntary human-voice tremor. 70 99


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