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Bishkek, Kyrgyzstan

Abduvaliev A.M.,Kumtor Operating Company
Gornyi Zhurnal

The author examines issues of water monitoring in the Kumtor River in the area of influence of the high-altitude Kumtor Mine currently in operation. The article shows concentrations of aluminum, iron, nickel, sulphates and suspended particles in the Kumtor River basin. The operating mine exerts, although low, impact on the Kumtor River being the main water body in the mining lease area. Higher concentrations of sulphates and suspended particles are observed in the mine influence zones. For instance, the Davydov glacier-derived runoff containing the Kumtor Mine water exhibits high concentrations of sulphates whereas the mine water can be reused at preparation plan for process needs. To reduce concentrations of suspended particles, it is required to clean gold washing cradles from accumulations of suspended particles using earthmoving machines twice a year: before thawing period and, later on, before wintertime. Source

Vinnikov D.,Kumtor Operating Company | Brimkulov N.,Kyrgyz State Medical Academy | Redding-Jones R.,Kumtor Operating Company
High Altitude Medicine and Biology

The aim of this study was to determine if work at high altitude is associated with accelerated lung function decline and if smoking could further accelerate this decline. Subjects working at high altitude (3800 to 4500 m) in a gold mine on shift-rotation basis were included, and 7320 spirometry reports were obtained throughout a 4-yr observation period (2005-2009). Out of 3368 selected reports with acceptable quality, for 842 patients aged 38.9 ± 8.6 yr we analyzed annual decline in vital capacity (VC), forced vital capacity (FVC), and forced expiratory volume during the first second (FEV1). VC was reduced by 46.5 mL, FVC by 67.8 mL, and FEV1 by 74.5 mL a year, greater than in historical controls. In those having initial FEV 1/FVC below 70%, yearly VC decline was 59.4 mL, FEV1 -58.6 mL. In long-term workers with no initial obstruction, FEV1 declined slower (67.2 vs. 101.3 mL/yr (p < 0.001); but VC and FVC decline did not differ. Work at high altitude for years may be a factor that accelerates lung function decline, and the rate of decline along with confounding factors should be the subject of future studies. © Mary Ann Liebert, Inc. 2011. Source

Vinnikov D.,Kumtor Operating Company | Brimkulov N.,Kyrgyz State Medical Academy | Redding-Jones R.,Kumtor Operating Company | Jumabaeva K.,Kumtor Operating Company
Respiratory Physiology and Neurobiology

The aim of this study was to assess how exhaled nitric oxide (NO) levels in healthy subjects changed upon exposure to intermittent hypoxia at high altitude. Eighty-one healthy subjects with a mean age of 31.8±6.7 years, well acclimatized at altitudes of 3800-4000m above sea level, and employed by a gold-mining company were recruited for the study. Baseline, altitude-corrected partial exhaled NO levels (PENO) were measured in Bishkek, Kyrgyzstan (780m). Measurements were then taken on day 1 of the ascent to the mine, which is located at an altitude of 4000m, on day 3 and finally at the end of the 2- or 3-week shifts. The mean PENO level was 9.49±3.66nmHg in Bishkek and was lower in females than in males (9.76±3.58nmHg vs. 7.03±3.71nmHg). When compared to the first day at altitude, exhaled NO was reduced by 17.2% on day 3 (p=0.001) and 29.6% by the end of the shift (p<0.001). In summary, this study of well-acclimatized high-altitude miners demonstrates that despite the absence of clinical signs of desadaptation, there is an apparent reduction in exhaled NO. © 2010 Elsevier B.V. Source

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