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At least 73 records · Page 4Linked to original sources
PubMed2005

Sulfates in the north polar region of Mars detected by OMEGA/Mars Express.

The Observatoire pour la Minéralogie, l'Eau, les Glaces, et l'Activité (OMEGA) imaging spectrometer observed the northern circumpolar regions of Mars at a resolution of a few kilometers. An extended region at 240 degrees E, 85 degrees N, with an area of 60 kilometers by 200 kilometers, exhibits absorptions at wavelengths of 1.45, 1.75, 1.94, 2.22, 2.26, and 2.48 micrometers. These signatures can be unambiguously attributed to calcium-rich sulfates, most likely gypsum. This region corresponds to the dark longitudinal dunes of Olympia Planitia. These observations reveal that water alteration played a major role in the formation of the constituting minerals of northern circumpolar terrains.

Atmosphere↗
PubMed2000

[The health of the command officer staff doing their service in Polar regions].

Initial referral (not considering dental diseases) for the last 4 years was analyzed in servicemen from the Northern Fleet, group of navy specialists serving in Headquarters was investigated. Anamnesis and central hemodynamic parameters were studied in casual sample (388 senior officers), special questionnaires were used to determine intensity of service activity. According to the data obtained during the last 4 years level of morbidity, hospitalization and disability (without dental diseases) in servicemen constituted 857.01%, in Headquarters senior officers it was 488.77%, hospitalization level was 40.14% and 18.05% respectively; disability level constituted 259.77% and 127.06%. Distribution of persons investigated in the groups according to category of working intensity was the following: the 1st (low working intensity)--0%, the 2nd (middle working intensity)--35.6%, the 3rd (intensive work)--61.3%, the 4th (high working intensity)--3.1%. Good health level was established in the group of senior officer staff. The results obtained allow to conclude that in conditions of Kol'sky Zapolarie morbidity can be decreased approximately in 1.75 times.

Adult↗
PubMed2001

Systemic reactions of haemostasis, haemodynamics, blood lipids and thrombocyte membrane state in watch labour in the trans-polar region.

Various types of system reactions of men's organism to industrial migrations (Tyumen--in latitude 57 degrees north and Kharasavey in latitude 71 degrees north) and the influence of climate stress are determined. Type I reaction is characterised by a moderate increase of the watch and its subsequent normalisation. Thus the tendency to hypocoagulaemia and POL processes increase, and AOD activation of thrombocyte membranes and total phospholipids content increase in the statistically significant lysolecitin increase (p<0.05). Type II reaction is characterised by the hypertensive state for the whole period of the watch. Simultaneously with it a tendency to hypercoagulaemia, an increase of POL processes and AOD decrease of thrombocyte membranes as well as significant changes in the phospholipids spectrum with a considerable increase of lysolecitin and cardiolipin fractions are observed. Type III reaction is characterised by the development of signs of the asthenic symptocomplex, hypotonia and sleep disturbances. Thus, the tendency to hypocoagulaemia, POL processes activation and AOD decrease as well as decrease of total phospholipid content is observed.

Adaptation, Physiological↗
PubMed2003

[Daily profile of arterial pressure in patients with arterial hypertension, continuously living in Tyumen polar region].

AIM: To study a 24-h profile of arterial hypertension and affection of target organs in hypertensive population of the Tyumen North. MATERIAL AND METHODS: 62 patients (43 men and 19 women, age 18-50 years) with arterial hypertension (AH) living in the North of the Tyumen region entered the test group. The control group consisted of 56 AH patients (36 men and 20 women) matched by age. They lived in the zone of moderate climate (in Tyumen). 24-h arterial pressure (AP) monitoring was made starting on day 2 of the patients' arrival in Tyumen. Echocardiography was made on the arrival day. The examination of the groups was conducted against "clean" background. RESULTS: The groups did not differ significantly by age, sex, AH duration, office systolic and diastolic pressure (SP, DP). However, 37 patients from the test group on arrival in Tyumen showed normalization of both office AP and mean 24-h AP. 25 patients from this group sustained high office and mean 24-h AP. An abnormal 24-h AP profile with nocturnal hypertension was recorded in 76.6% of the test group and 28.31% patients of the control group. Left ventricular hypertrophy was significantly more pronounced in the test group than in the control one. CONCLUSION: In 2/3 patients from the North with AH stage 1 and 2 office AP and mean 24-h AP normalized upon their arrival to the zone of moderate climate but their left ventricular hypertrophy was more severe and changes in a 24-h AP profile with nocturnal hypertension persisted.

Adolescent↗