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Biomedical subjects

J Jones

Publications and source records attributed to J Jones.

At least 739 records · Page 41Linked to original sources
PubMed1977

A photometric study of the color of health gingiva.

An apparatus was developed that was found suitable for measuring gingival color in terms of reflectance at 6328 A. A total of 445 readings were taken on 95 Caucasian subjects in order to determine certain properties of healthy gingival color. It was determined that: 1. Healthy adult gingival color ranged in reflectance from 17% to 45% of the magnesium oxide standard, with a mean of 32%. 2. Gingival color of children was lighter than that of adults. The reflectance of children's gingiva ranged from 31% to 43%, with a mean of 35%. 3. Gingival color did not vary with the sex of the individual. 4. Gingival color was lighter in individuals with blonde hair than in individuals with brown hair. 5. Gingival color was darker in individuals with darker eye color. 6. Gingival color was lighter in individuals with geographic origins that are commonly related to lighter complexions. 7. Gingival color did not vary with age, within the adult range covered in this study. 8. Gingival color did not vary with the following physiological and physical factors: menstrual period, use of oral contraceptives, smoking habits, moistness or dryness of the gingiva, which side was measured, time of day, or time after toothbrushing, smoking a cigarette, eating an apple, or drinking a hot beverage.

Adult↗
PubMed1977

Coeliac plexus block with alcohol for relief of upper abdominal pain due to cancer.

One hundred cases of coeliac plexus block in which absolute alcohol was used as a sclerosing agent, performed over a period of 10 years between 1963 and 1973, are analysed. A success rate of 91% in relieving the pain of advanced intra-abdominal malignant disease is claimed and reasons for failures are advanced. The technique described is relatively simple and a 3-day hospital stay is all that is required. It is recommended that this procedure be carried out before the invalid is subjected to repeated injections of narcotic drugs or any form of surgery for pain relief.

Abdominal Neoplasms↗
PubMed1976

Nondestructive neutron activation analysis of marine organisms collected from ocean dump sites of the middle eastern United States.

The concentrations of eight metals were determined by a nondestructive neutron activation technique for eleven species of fish and shellfish. The marine organisms were collected from ocean dump sites off New York City, off New Haven, Connecticut, and off Delaware Bay. Antimony was not detected in most of the organisms examined in thid study; the detection limit was about 0.02 to 0.05 ppm. Antimony levels ranged from 0.01 to 0.129 ppm in fish that had detectable levels. Cobalt levels were low in all samples with most levels in the range of 0.1 to 0.3 ppm. Chromium concentrations at 0.3 to 1.0 ppm were only roughly quantitated by the procedure employed. Most marine organisms examined had chromium levels at or below these values. Nickel was not detected in any of the organisms examined; the detection limit was in the 3 to 6 ppm range. Rubidium concentrations were 0.6 to 1.5 ppm for most organisms; only rough quantitative measurement was possible at these levels. Selenium levels ranged from about 0.3 to 3.8 ppm in all samples. Silver concentrations were below 0.3 ppm in most organisms. Silver concentrations as high as 10 to 30 ppm, however, were found in the digestive gland of rock crab. Zinc levels in windowpane flounder liver were about 6 to 9 times greater than the 4 to 10 ppm levels found in muscle. Zinc concentrations in rock crab muscle, on the other hand, were only slightly higher than the 15 to 32 ppm concentration found in the digestive gland. Fish other than windowpane flounder had zinc levels that ranged from 4 to 9 ppm in the muscle and 14 to 42 ppm in the liver. Shellfish other than rock crab had zinc levels of 15 to 30 ppm in muscle and 17 to 40 ppm in the digestive gland.

Animals↗
PubMed1976

Application of visual-analogue scales to the measurement of functional capacity.

Visual-analogue scales can be used to measure the subjective aspect of functional ability but, in a group of patients with severe rheumatoid arthritis, the severity of impairment of two predetermined functional tests was low in comparison with the severity of pain. Measurements of the ability to carry out these two functions, using visual-analogue and descriptive scales, and also using the time taken to perform the tasks, were not useful measures of the effectiveness of treatment of rheumatoid arthritis. Poor correlations were obtained between different measures of the same function and between different functions measured in the same way.

Anti-Inflammatory Agents↗
PubMed1975

The action of isoproterenol on phenylthiourea induced pulmonary edema.

Isoproterenol inhalation increases the pulmonary edema induced in rats by phenylthiourea. Propranolol decreases this response while phenoxybenzamine has no effect upon it. It is proposed that the observed increase in toxicity is related to the beta-adrenergic effects of the isoproterenol and that the specific mechanism responsible might be an increase in pulmonary capillary hydrostatic pressure which is secondary to an increase in pulmonary blood flow.

Aerosols↗
PubMed1974

flrB, a regulatory locus controlling branched-chain amino acid biosynthesis in Salmonella typhimurium.

Salmonella typhimurium strain CV123 (ara-9 gal-205 flrB1), isolated as a mutant resistant to trifluoroleucine, has derepressed and constitutive levels of enzymes forming branched-chain amino acids. This strain grows more slowly than the parent at several temperatures, both in minimal medium and nutrient broth. It overproduces and excretes sizeable amounts of leucine, valine, and isoleucine in comparison with the parental strain. Both leuS (coding for leucyl-transfer ribonucleic acid [tRNA]synthetase) and flrB are linked to lip (min 20 to 25) by P1 transduction, whereas only leuS is linked to lip by P22 transduction. Strain CV123 containing an F' lip(+) episome from Escherichia coli has repressed levels of leucine-forming enzymes, indicating that flrB(+) is dominant to flrB. Leucyl-tRNA synthetase from strain CV123 appears to be identical to the leucyl-tRNA synthetase in the parent. No differences were detected between strain CV123 and the parent with respect to tRNA acceptor activity for a number of amino acids. Furthermore, there was no large difference between the two strains in the patterns of leucine tRNA isoaccepting species after fractionation on several different columns. Several other flrB strains exhibited temperature-sensitive excretion of leucine, i.e., they excreted leucine at 37 C but not 25 C. In one such strain, excretion at 37 C was correlated with derepression of some enzymes specified by ilv and leu. These latter results suggest that flrB codes for a protein.

Amino Acids↗