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silicone chemicals have a unique structure:(1) Sufficient methyl groups on the Si atom shield the high-energy polysiloxane backbone;(2) C-H has no polarity, which makes the interaction between molecules very weak;(3) The length of the Si-O bond is long, …

Реакции: довольно сложно для восприятия (1) посмеялся (посмеялась) (1) со всем согласен (1) меня вдохновило! (1) грусть (1) сочувствие (1) удивление (1) злость (1) обескураженность (1) вызвало обеспокоенность (1)

Қазақстан Желіде · 2087 дней(я) назад 0 2350

ECOLOGY AND ARCHEOLOGY: INTERACTIVE PARADOXES

by Alexei KAZDYM, Cand. Sc. (Geol. & Mineral), Senior Research Associate, Institute of Geoecology, Russian Academy of Sciences Today most different scientists-geologists and ecologists, earth and soil scientists, geochemists and microbiologists - are c …

Қазақстан Желіде · 2663 дней(я) назад 0 2587

GEODYNAMICS GOES GLOBAL

by Academician Viktor KHAIN, Institute of the Lithosphere of Fringing and Inland Seas, Russian Academy of Sciences REVOLUTION IN GEOLOGY: PLATE TECTONICS Late in the 1960s and early 1970s the solid earth sciences ceased to be descriptive and got down to ex …

Қазақстан Желіде · 2687 дней(я) назад 0 2821

ENERGY OF VOLCANOES

Thinking about the future, many of us cannot escape the nagging question of what will happen on this I planet when it runs out of its resources of oil and gas. The obvious solution is to look for the sources of new types of fuel. The popular science magazi …

Қазақстан Желіде · 2688 дней(я) назад 0 2334

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