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Biomedical subjects

D Pal

Publications and source records attributed to D Pal.

At least 73 records · Page 4Linked to original sources
PubMed1990

Effect of stress on the catecholamine content of the adrenal gland of intact and bursectomized chicks.

1. Bursa-intact and bursectomized chicks were exposed to cold-wet immobilization (CWI) stress for 1.5 min. The catecholamines (CA) from the adrenal gland were measured spectrofluorometrically 5, 15, 30 and 60 min after stress. 2. In bursa-intact chicks, the CWI stress caused decrease of both norepinephrine and epinephrine from the adrenal glands 5 min after stress. Resynthesis of epinephrine exceeded the control value 30 and 60 min after stress. 3. In bursectomized chicks, the CWI stress brought about a decrease of norepinephrine 15 and 30 min and of epinephrine 30 and 60 min after stress. 4. The findings suggest that bursa facilitates early (5 min) release of CA and also helps in quick resynthesis of epinephrine during stress.

Adrenal Glands↗
PubMed1990

Effect of progesterone (norethindrone) only oral contraceptive on mouse uterus--a SEM study.

Impact of progesterone (norethindrone) only oral contraceptive (MICRONOR) on mouse uterus was investigated by SEM. The three dimensional SEM photographs revealed that, flat wave like mucous folds of the uterus (control) become more thick and highly convoluted after 50 days of MICRONOR feeding. The uteri became highly secretory as indicated by increased thickness of nonciliated secretory cell population with their increased microvilli. Low doses of norethindrone in combination with circulating estrogen, instead of causing regression, maintained a steady and highly secretory state which may interfere implantation/gamete transport.

Animals↗
PubMed1989

Outbreak of cholera in Berasia block of Bhopal District in Madhya Pradesh.

Bhopal district, Madhya Pradesh has been considered to be free of cholera. In an outbreak of gastro-enteritis in Berasia block of Bhopal district, Cholera vibrio Inaba and Ogawa were isolated from 17.64 per cent of stool samples collected. Extreme insanitary conditions, large aggregation of uncontrolled population and probably consumption of infected ice candies were responsible for the outbreak of cholera.

Adolescent↗
PubMed1988

The effects of slip velocity at a membrane surface on blood flow in the microcirculation.

Closed-form solutions are presented for blood flow in the microcirculation by taking into account the influence of slip velocity at the membrane surface. In this study, the convective inertia force is neglected in comparison with that of blood viscosity on the basis of the smallness of the Reynolds number of the flow in microcirculation. The permeability property of the blood vessel is based on the well known Starling's hypothesis. The effects of slip coefficient on the velocity and pressure fields are clearly depicted.

Blood Flow Velocity↗
PubMed1986

Sporotrichosis in India: first authentic case report from the north-western region and a critical literature review.

The first case of sporotrichosis from north-western region is reported along with a critical review of the work done on this disease in India. The patient, a 55-year-old housewife with multiple lymphocutaneous lesions on her left arm, had never travelled to north-eastern India where sporotrichosis occurs endemically. She was a resident of Ranikhet, District Nainital, Uttar Pradesh (U.P.), situated about 235 km north-east of Delhi. The diagnosis was established by demonstration of Sporothrix schenckii through direct microscopy and culture of pus collected from multiple suppurative lesions, verification of the dimorphic character of the fungus in vitro and its pathogenicity to white mice. She was treated successfully with oral administration of potassium iodide for 6 weeks.

Animals↗
PubMed1986

Magnum morphogenesis during the natural development of the quail oviduct: analysis of egg white proteins and progesterone receptor concentration.

The histological development of the quail oviduct and the changes in concentrations of progesterone receptor, ovalbumin, conalbumin, ovomucoid and ovoglycocomponents are analyzed during the period spanning 7-35 days of age. The initiation of luminal epithelial cell proliferation is the first event of magnum growth. The epithelial cells begin to evaginate into subepithelial stroma and form tubular glands. Meanwhile, luminal epithelium starts cellular pleomorphism through ciliogenesis. No egg white proteins are detectable in the developing glands; at the same time, the concentration of the progesterone receptor increases from about 5500 sites/cell to 30,300 sites/cell. Tubular gland cells then begin to synthetize and accumulate egg white proteins, mucous cells differentiate in the luminal epithelium, and the cell proliferation decreases and finally stops. Compared with earlier studies dealing with the blood levels of estrogen and progesterone in developing quails during the same period, and the cellular changes induced in the oviducts of ovariectomized and ovariectomized-hypophysectomized quail by exogenous steroids, these results distinguish between the cellular responses that are physiologically controlled by estradiol and other responses that have multihormonal regulation.

Animals↗
PubMed1986

Effect of couple stresses on the unsteady convective diffusion in fluid flow through a channel.

A generalized dispersion model is used to obtain exact solution for unsteady convective diffusion in the presence of couple stresses. The effect of the couple stress parameter 'a' on the most dominant dispersion coefficient is clearly depicted. The dimensionless mean concentration distribution is obtained as a function of dimensionless axial distance, time and 'a'. The results for 'pure convection' are also reported. It is shown that the effect of couple stress is predominant only for small values of 'a' and when a----infinity the flow characteristics tend to their equivalents in Newtonian theory. The results of Taylor's dispersion model are recovered as a particular case in the limit tau----infinity.

Blood Physiological Phenomena↗
PubMed1986

Report of a study into skin sensitivity and into scar diameter after vaccination with BCG in 5,000 new-borns in Cakovec, Yugoslavia.

To compare the skin allergy producing potency of batches of BCG from three different production centers, 5,066 new-borns were vaccinated with one of there batches (one from the Netherlands, one from Yugoslavia and one from Denmark). Six, twelve and twenty-one months after vaccination tuberculin testing was done and the diameter of scars was measured in subgroups. Skin allergy through BCG-vaccination was registered to be highest after 6 months and appeared to wane rapidly afterwards. There was a definite difference in the skin allergy potency between the three vaccines. The difference in scar diameter was less pronounced. In 5,066 vaccinated new-borns 137 (2.7%) enlarged axillar glands were registered. There appeared to be a positive correlation between the mean Mx-induration 6 months after vaccination and the percentage of enlarged glands. No serious complications have been registered so far.

BCG Vaccine↗
PubMed1984

Coincidence of pseudohypoaldosteronism with gluten-enteropathy.

This is a 21-month-old boy with pseudohypoaldosteronism (PHA) in coincidence with celiac disease. The diagnosis of PHA was made on the basis of hyponatremia, hyperkalemia and large urinary salt losses, as well as high renin activity and aldosterone levels and increased urinary plasma aldosterone. Whereas mineralocorticoid therapy was ineffective, salt therapy has proven successful. The patient's HLA type was found to be characteristic of gluten-enteropathy (A1, B8, DR3). The combination of PHA and celiac disease has not yet been described and is probably a coincidence. However, it is suggested that other PHA patients be typed in order to investigate the segregation between HLA type, PHA and celiac disease.

Aldosterone↗
PubMed1984

An epidemiological study of scabies in a rural community in India.

An epidemiological survey for scabies was conducted in a rural community of 2771 persons among 404 households living in 238 houses. Prevalence rates were 13% by population and 30.9% by household. Each index case was responsible, on average, for the spread of infection to 1.9 persons in affected households. Significantly lower rates of secondary attack and transmissibility were observed among the more prosperous villagers. The proportion of infected households increased linearly with household size. The prevalence was highest in those aged up to 19 years, both sexes being affected equally. An average morbidity duration for scabies was 64.5 days; 16.3% of the patients showed secondary pyogenic infection of the skin.

Adolescent↗
PubMed1984

Development of the oviduct in quail during sexual maturation in relation to plasma concentrations of oestradiol and progesterone.

The macromolecular content (DNA, soluble proteins and ovalbumin) of the magnum and the plasma concentrations of oestradiol and progesterone were studied during sexual development of the Japanese quail. Rapid growth and differentiation of the magnum began between 21 and 28 days of age and rapidly reached the laying stage in about 20 days. This rapid change in magnum size occurred in a stepwise manner: cellular proliferation was observed first, followed by the synthesis and accumulation of specific proteins. Just before and during magnum growth, plasma oestradiol and progesterone concentrations followed different patterns: the initiation of epithelial cell proliferation was preceded by a sharp decrease in plasma progesterone. Maximum cell division occurred while plasma progesterone levels continued to decrease slightly; at the same time, oestradiol increased from 0.098 to 0.453 nmol/l. The decrease and finally the cessation of cell proliferation and the concomitant increase in ovalbumin concentration were related to almost constant levels of plasma oestradiol and increasing levels of plasma progesterone. Further development of the magnum (above 2.3 g weight) involving only the accumulation of secretory products was associated with an increased value of plasma progesterone. These data are consistent with the hypothesis that there are multiple hormonal signals controlling cell proliferation and synthesis of egg-white proteins in the oviduct. Progesterone may be one of the key signals that regulates the initiation of oviduct growth in the quail.

Animals↗