Results 121 to 130 of about 147,056 (305)
Early evolutionary history of the seed
Biological Reviews, EarlyView.ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman +2 more
wiley +1 more source
Influences of Material Selection, Infill Ratio, and Layer Height in the 3D Printing Cavity Process on the Surface Roughness of Printed Patterns and Casted Products in Investment Casting. [PDF]
Micromachines (Basel), 2023 Nguyen TT +8 more
europepmc +1 more source
Sustainable Investment Casting
, 2016 Abstract Sustainability is becoming the most important criteria in all aspect of human existence including manufacturing. Investment casting is an old manufacturing method of shaping various alloys. Moulding, melting, alloying, pouring, solidification and finishing are steps in investment casting.
Mehrabi, Hamid +2 more
openaire
Ecology and evolution of pyrazines in insects
Biological Reviews, EarlyView.ABSTRACT Chemical communication is the oldest and most widespread form of signalling among and within organisms. Among the many compounds involved in such communication, pyrazines – nitrogen‐containing heterocyclic molecules – are especially intriguing due to their widespread occurrence across the tree of life, from bacteria and fungi to insects and ...
Zowi Oudendijk +2 more
wiley +1 more source
Non-Contact Multiscale Analysis of a DPP 3D-Printed Injection Die for Investment Casting. [PDF]
Materials (Basel), 2021 Kroma A +4 more
europepmc +1 more source
Electoral Business Cycles in OECD Countries [PDF]
Studies of OECD countries have generally failed to detect real economic expansions in the pre-election period, casting doubt on the existence of opportunistic political business cycles.
Canes-Wrone, Brandice, Park, Jee-Kwang
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Application of rapid prototyping technology in the investment casting technology [PDF]
, 2011 Pro urychlení výroby prototypových odlitků, je nezbytné zkrácení času potřebného na výrobu vytavitelného modelu, což umožňuje právě technologie Rapid Prototyping.
Čejka, Libor
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Business Strategy and the Environment, EarlyView.ABSTRACT The apparel industry is one of the world's most profitable sectors but also among the most environmentally damaging. Growing sustainability pressures have led companies to adopt diverse strategies to reduce their impact, yet no single study has systematically analysed these approaches or their consumer implications.
Maria Leonor Ferreira +1 more
wiley +1 more source
Gypsum bonded investment for micro-structure casting of ZnAl4 [PDF]
China Foundry, 2010 The effects of sintering temperature on the surface roughness of gypsum bonded investments were investigated to find the appropriate sintering temperature applied for micro-investment casting.
Yang Chuang, Li Bangsheng, Ren Mingxing
doaj
"Net Shape" technologies suitable for castings [PDF]
, 2010 Tato bakalářská práce si klade za úkol shromáždit základní informace o technologiích používaných při výrobě odlitků na hotovo, tedy bez nutnosti dalšího obrábění, tzv. „Net-Shape“.
Bartoš, Filip
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