نتایج جستجو برای: soda ash

تعداد نتایج: 27104  

2017
Lucyna Twerd Maciej Krzyżyński Barbara Waldon-Rudzionek Piotr Olszewski

BACKGROUND Published sources document a loss of biodiversity at an extreme rate, mainly because natural and semi-natural ecosystems are becoming fragmented and isolated, thus losing their biological functions. These changes significantly influence biological diversity, which is a complex phenomenon that changes over time. Contemporary ecologists must therefore draw attention to anthropogenic re...

Journal: :Journal of the National Science Foundation of Sri Lanka 1982

Journal: :European Journal of Engineering Research and Science 2017

Journal: :Current Biology 2008
Nigel Williams

infancy and causes severe vision loss, especially at night. An estimated 2,000 Americans have the form of the disease they targeted, Bennett said. But other reports were not satisfied with a mere 2,000 potential beneficiaries. New hope is offered to “millions affected by eye diseases” said the Independent. This was “hundreds of thousands” in the Los Angeles Times. But the LA Times also highligh...

Journal: :پژوهش های علوم و فناوری چوب و جنگل 0

this study was conducted to compare the yield and strength properties of soda and kraft pulp produced from populus deltoeides sapwood and heartwood. initially fiber length, lignin content in both sapwood and heartwood were measured. then from either sapwood or heartwood pulps were prepared with using soda and kraft processes, handsheets were made from this pulp and mechanical properties were me...

Journal: :Archaeological and Anthropological Sciences 2022

Abstract Glazed decoration in Iran from the Middle Elamite to Achaemenid periods includes world art milestones. With exception of Hasanlu IVB, for most sites, comprehensive chemical and mineralogical data are lacking, owing generally profound alteration vitreous material. To bridge information gap, enable reconstruct operation production chains a diachronic fashion, thirty-six glazed artefacts ...

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