STUDY ON THE CAUSE OF HYPOXIA IN THE CORNER OF RETURN AIR OF SHALLOW BURIED FLAMMABLE COAL SEAM GROUP MINING FACE AND THE COORDINATED PREVENTION AND CONTROL OF COAL SPONTANEOUS COMBUSTION

Coal is the main energy source in China, and spontaneous combustion of coal is one of the main disasters in coal mines.Fully mechanized caving top coal mining technology is widely used in coal mines.Under the comprehensive action of multiple factors, gas generated by coal oxidation and low oxygen gas in goaf is Carpet Shampooers easy to rush to wor

Although DNA metabarcoding KIDNEY TONE PET of pollen mixtures has been increasingly used in the field of pollination biology, methodological and interpretation issues arise due to its high sensitivity.Filtering or maintaining false positives, contaminants, and rare taxa or molecular features could lead to different ecological results.Here, we revie

We present a high-resolution cross-disciplinary analysis of kinship structure and social institutions in two Late Copper Age Bell Beaker culture cemeteries of South Germany containing 24 and 18 burials, of which 34 provided genetic information.By combining archaeological, anthropological, genetic and isotopic evidence we are able to document the in

Climate change is predicted to affect water resources infrastructure due to its effect on rainfall, temperature and evapotranspiration.However, there are huge uncertainties on both the magnitude and direction of these effects.The Pong reservoir on the Beas River in northern India serves irrigation and hydropower needs.The hydrology of the catchment