PubMed Health⌕ Search

Biomedical subjects

J Giner

Publications and source records attributed to J Giner.

At least 19 recordsLinked to original sources
PubMed1991

Measurement of maximal static respiratory pressures at the mouth with different air leaks.

The effect of two different circuit leaks on the measurement of maximal static inspiratory and expiratory pressures at the mouth (Pimax, Pemax) was assessed in 70 patients with respiratory disease. Patients were divided into three groups with similar anthropometric and spirometric characteristics. The first group (30 patients) had their Pmax measured with a leak of 2.0 mm internal diameter (ID) and 37 mm length (as proposed by T. Ringqvist) and repeated with a second leak of 1.0 mm ID and 15 mm length (as recommended by J. L. Clausen). The two measurements were done in random order. Measurements for the other two groups (20 patients each) were taken with one or another, the two leaks randomly alternated with no leak. Pimax measurements obtained with Ringqvist's leak were 17 percent (p less than 0.005) lower than those with Clausen's leak and 22 percent (p less than 0.005) lower than those with no leak. Pemax measurements performed with Ringqvist's leak in place were 11 percent (p less than 0.005) lower than those with Clausen's leak and 11 percent (p less than 0.005) lower than those obtained with no leak. The comparison between Clausen's leak and no leak showed no statistically significant difference. We conclude that whenever the effect of pressure generated in the mouth is to be avoided in the measurement of respiratory Pmax, a leak of the size proposed by Ringqvist is to be preferred.

Asthma↗
PubMed1990

Moclobemide versus clomipramine in the treatment of depression: a multicentre trial in Spain.

The efficacy, tolerability and safety of moclobemide were compared with those of clomipramine in a double-blind, randomized parallel group study over 4 weeks. Patients were suffering from various forms of depression: 33 received moclobemide and 31 clomipramine. The mean score on the Hamilton Rating Scale for Depression decreased gradually in both groups, with no significant differences between them; the final scores showed an improvement of 57% in the moclobemide group and 60% in the clomipramine group, compared with baseline. The investigators' assessment of efficacy at the end of treatment was good or very good for 60% of moclobemide patients and 50% of clomipramine patients, and tolerance was good or very good for 31 patients on moclobemide and 26 on clomipramine. The drugs thus showed comparable antidepressant efficacy, and both were mostly well tolerated, although adverse events were more prevalent in patients treated with clomipramine.

Adult↗
PubMed1989

Patterns of consumption of alcohol in Seville, Spain. Results of a general population survey.

The results of a general population survey of the patterns of consumption of alcohol in a representative sample of the province of Seville, Spain, are analysed in this article. The proportions of drinkers and abstainers and distribution by age, by sex and by urban-rural residency are discussed. Frequency of consumption declines as age increases in both sexes but the negative slope is more marked in females. Analysis of the results on quantity of alcohol consumed during the week prior to the interview shows that men drink more heavily than women in all age-groups and young people drink more heavily than other age-groups. The combination of data on frequency of consumption and maximum quantity of alcohol reportedly consumed on the highest drinking occasion shows that the majority of men belong to the High Frequency-Low Quantity typology, followed by High Frequency-Medium Quantity, but in women nearly 60% belong to the Low Frequency-Low Quantity typology, followed by High Frequency-Low Quantity. The highest proportions of both abstainers and heavy drinkers are found in the group of people with the lowest income.

Adolescent↗
PubMed1988

Electrocatalytic glucose sensor.

High surface area platinum subjected to the appropriate electrical potential cycling regimes exhibits considerable electrocatalytic activity towards glucose oxidation. We have developed a special data processing method, the compensated net charge (CNC) method, to take advantage of the electrocatalytic activity of platinum. This method involves the determination of the net oxidation charge during one complete cycle of a cyclic voltammogram applied to the platinum electrode in a potentiodynamic mode. Under these conditions, the electrode response is very sensitive to glucose, completely insensitive to urea, and only moderately sensitive to amino acid concentration changes. Earlier work with other endogenous and exogenous potential co-reactants shows little interference. Data obtained in vitro and in vivo will be presented and discussed.

Animals↗
PubMed1985

Serum lipid levels before and after vasectomy in men.

The blood lipid profile was determined in sixty-two men, 24 to 62 years old, before and two, six and twelve months after surgical occlusion of the vas deferens. No statistically significant differences were found in mean body weight, blood pressure, serum levels of non-esterified fatty acids, total lipids, triglycerides, total cholesterol and alpha, beta and prebeta fractions of the lipoproteins, which were measured before and after surgery. When the serum levels of the alpha and beta fractions were considered in the same subject, it was observed that 12 months after vasectomy a similar percentage of cases showed a predominance of either one of them. Hence, no modifications on the lipid profile of these subjects were found that could indicate an increased risk of arteriosclerotic disease.

Adult↗
PubMed1979

The development of an implantable electrochemical glucose sensor: response to glucose in bovine serum ultrafiltrate.

A glucose sensor based on organic oxidation reactions at a platinum electrode is being developed as the key component for an implantable artificial beta cell for diabetic patients. Sensitivity of a membrane-covered platinum electrode to changing glucose concentration in bovine serum ultrafiltrate has been demonstrated, with current response as high as 60 microamperes per 100 mg/dl change in glucose concentration. Reproducibility of measurements probably will depend on satisfactory mechanical assembly of the membrane-electrode combination. An approach to selectivity based on multiple current measurements is suggested.

Animals↗
PubMed1978

Inherited congenital normofunctional testicular hyperplasia and mental deficiency. A corroborative study.

Three 46,XY unrelated individuals out of 84 postpubertal male inpatients with severe mental deficiency in a psychiatric hospital were found to have megalorchidia and macrogenitosomia. One of the cases had a similarly affected brother. Endocrine studies were performed in two of the cases with similar results. Normal plasma levels of pituitary gonadotropins were found. A normal testicular function was demonstrated by the finding of normal: (a) baseline plasma testosterone levels and a significant rise following human chorionic gonadotropin administration, (b) sperm analysis, and (c) morphology and cell architecture of the testes. These results were compatible with normofunctional testicular hyperplasia confirming previous observations and allowing the definite individualization of a syndrome with mental deficiency probably due to an X-linked recessive mutation.

Adult↗
PubMed1978

Effect of prolactin on the glycolytic metabolism of spermatozoa from infertile subjects.

The effect of prolactin on the glycolytic metabolism of spermatozoa from married infertile men whose semen had spermatozoal concentrations of less than 40 million/ml was studied. In a respirometry system, spermatozoa were incubated with L-U-14C-glucose as substrate. Glucose utilization and production of 14C-lactate by the spermatozoa in the presence of 100 ng of ovine prolactin were greater than in the absence of the hormone. The production of pyruvate was 2.5 times less than the production of lactate wehn spermatozoa were incubated in the absence of prolactin and 1.6 times less in the presence of prolactin. These results indicate that, in spite of having an increased glycolytic metabolism, spermatozoa from oligospermic men are are able to show additional glucose utilization in the presence of prolactin.

Adult↗
PubMed1978

Lactate and pyruvate utilization by the spermatozoa of infertile human males.

In studying the metabolic pathway of lactate and pyruvate in human spermatozoa from fertile and infertile subjects, pyruvate 1-C14 and lactate 1-C14 were used as substrates in a radiorespirometry system. Spermatozoa from patients with 20 +/- 2.0/10(6) spz/ml and decreased motility (group B) showed a more active decarboxylation of both pyruvate 1-C14 and lactate 1-C14 with a higher production of lactate C14, oxaloacetate, citrate, and isocitrate than those from fertile normal subjects (group A). Spermatozoa from fertile patients with normal counts but low motility (35 +/- 2.0% +++ motility) showed a similar rate of decarboxtlation of pyruvate 1-C14 but a greater rate of decarboxylation of lactate 1-C14 than those from fertile subjects. The low utilization of pyruvate by the spermatozoa from group C infertile patients, with intermediate counts and motility could be explained by a metabolic failure similar to that produced by some inhibitors of the respiratory chain. We do not have an explanation for the metabolic behavior observed in spermatozoa from group B patients, and further research on this point is desirable.

Adult↗
PubMed1976

Endocrine effects of vasectomy.

In order to provide information on the endocrine effects of vasectomy, unconjugated pregnenolone, dehydroepiandrosterone, androstenedione, testosterone, dihydrotestosterone, oestrone and oestradiol were analysed in the blood plasma of twenty Mexican men on two occasions before and 1, 3, 6 and 12 months after vasectomy. Vasectomy appeared to be associated with a significant decrease in the plasma levels of pregnenolone, dehydroepiandrosterone and androstenedione and a significant increase in the levels of dihydrotestosterone and oestrone. A probably significant increase in oestradiol levels took place 12 months after vasectomy but not before. No consistent changes were found in testosterone (up to 12 months) or in FSH and LH levels (up to 6 months) after vasectomy. The unconjugated steroids indicated above, except oestrone, were also estimated, whenever possible, in seminal plasma specimens obtained from thirty-nine subjects (including the twenty indicated above) on the same occasions. Vasectomy was associated with a highly significant decrease of seminal plasma dihydrotestosterone levels on all occasions and a significant decrease in androstenedione levels after 6 and 12 months. After 12 months there was a decrease in dehydroepiandrosterone and an increase in oestradiol; these changes were both probably significant. In another preliminary study, the levels of pregnenolone sulphate, dehydroepiandrosterone sulphate, testosterone glucuronide, testosterone sulphate and dihydrotestosterone sulphate were estimated before and 1 month after vasectomy in the seminal plasma of fourteen to seventeen subjects. Testosterone glucuronide fell, probably significantly, but other conjugates were unchanged. The data indicate that vasectomy may be associated with significant changes in the circulating and in seminal plasma levels of several steroids. The gradual nature of some of the changes observed suggests the necessity of conducting in several centres large-scale, long-term studies on vasectomized subjects and on a carefully matched control group. During the last decade vasectomy has been widely practised in several parts of the world as a method of fertility control. However, information on the endocrine effects of this intervention appears to be scanty. In most of the human studies reported, a small number of individuals were investigated and the studies have been confined to the assessment of the short-term effects of the operation. Moreover, the hormonal indices assessed by the various investigators have been limited, in most cases, to gonadotrophins and testosterone in blood. The present study was designed to assess in the same subjects the levels of a number of unconjugated steroids, FSH and LH on two occasions before and 1, 3, 6 and 12 months after vasectomy. The studies were extended to include steroid analyses in seminal plasma in the hope that such assays might yield information as to the effects of vasectomy on the distribution of steroids in the fluids of the male reproductive tract.

Adult↗
PubMed1976

[Determination of fructose, proteins, oxalacetic and pyruvic transaminase in the seminal plasma of vasectomized patients].

Measurement of concentrations of fructose, proteins, oxalacetic and pyruvic transaminases in seminal plasma were performed in a group of 20 normal males, 30 to 40 years old, subjected to vasectomy. There were no statistically significant differences among the values obtained before and 6 months after the vasectomy. In consecuence it is concluded that bilateral occlusion of the vas deferens do not modify the androgenic function of the testis, and that certain enzymes like glutamic oxalacetic and pyruvic transminases are not incorporated to the semen by the testis but rather by the prostate and/or by the seminal vesicles.

Adult↗
PubMed1975

Comparative glycolytic metabolism of sperm from normal, asthenospermic, and oligoasthenospermic men.

The glycolysis of spermatozoa from normal, asthenospermic, and oligoasthen ospermic men was studied using a respirometry technique to measure glucose utilization by the production of 14CO2 from glucose 14C (U-L). Lactate and pyruvate were measured by a spectrophotometric method using DNA as reference. Human spermatozoa preferred glucose to fructose as the glycolytic substrate when concentrations of these hexoses did not exceed normal concentrations in the blood. Spermatozoa from oligoasthenospermic men produced an average of 3.5 times more 14CO2 (345, 457 dpm/mg DNA/hour) than did spermatozoa from asthenospermic (88,837 dpm/mg DNA/hour) and normal men (96,595 dpm/mg DNA/hour). They also formed four times more lactate (9.63 mumoles/mg DNA/hour) than spermatozoa from normal men (2.33 mumoles/mg DNA/hour) and 6.4 times more pyruvate (2.90 mumoles/mg DNA/hour compared to 0.45 mumoles/mg DNA/hour). Spermatozoa from asthenospermic men formed amounts of lactate (3.01 mumoles/mg DNA/hour) and pyruvate (0.63 mumoles/mg DNA/hour) similar to those produced by spermatozoa from normal men.

Carbon Dioxide↗