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Effect of coal mine organic aerosol on the methane/air lower explosive limit

International Journal of Coal Science & Technology 2020年第4期7卷 778-786页

作者： S.V.Valiulin A.A.Onischuk A.M.Baklanov a.a.bazhina D.Yu.Paleev V.V.Zamashchikov A.A.Korzhavin S.N.Dubtsov Voevodsky Institute of Chemical Kinetics and Combustion Novosibirsk 630090Russia Novosibirsk State University Novosibirsk 630090Russia Novosibirsk State Pedagogical University Novosibirsk 630126.Russia Institute of Coal.Kemerovo 650610 Russia

Organic aerosol is formed in coal mines due to heat release and evaporation of organics from coal during the longwall *** frictional heating occurs when a metallic cutting bit strikes a *** formed organic aerosol can contribute significantly to the explosivity of methane/air atmosphere in coal *** this paper,the flammable limits for the methane-air mixtures with organic aerosol are *** this purpose,organic aerosol is synthesizes from the coal-tar pitch in a laboratory evaporation-nucleation flow *** particles synthesized under laboratory conditions are aggregates consisting of small primary particles with the fractal-like dimension Df=2.0±0.1,which is close to Df=2.1±0.1 of coal mine *** is shown that the flammability of organic aerosol/methane mixture in air is in good agreement with the Le Chatelier additive *** lower ignition limit for the pure organic aerosol in air is 44 g/m^3.

关键词： Organic aerosol Explosivity of aerosol Coal mine Methane-air mixtures Agglomeration

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<i>Abies sibirica</i>Male Reproductive Cones Developmental Shift at Introduction

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Open Journal of Ecology 2014年第6期4卷 311-320页

作者： Elena V. bazhina V.N. Sukachev Institute of Forest Siberian Branch of Russian Academy of Sciences Krasnoyarsk Russia

A strong effect of climate on phenological events in conifers has been documented by several studies. To study adaptation of reproductive processes in Abies sibirica Ledeb. to changing environment, the phenology of the development of the species male reproductive cones at introduction was studied. Phenological shift in Abies sibirica meiosis and pollination was observed. An earlier start of male bud reproductive development is founded in V.N. Sukachev Institute of Forest Arboretum resulted in increasing meiosis and pollen irregularities. Insufficient high quality pollen in the species at its pollination stage may be a major factor responsible for the incapability to produce the viable seeds in quantities sufficient for pollination in seed gardens. Responses of the fir male cone development to the current environmental conditions at the Arboretum may be considered as a model of adaptation of the species to climatic changes.

关键词： Abies sibirica Ledeb. Forest Arboretum Male Buds Development Phenological Shifts

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