Elektronový mikroskop, přestože se zdá mít nejlepší léta za sebou, je přístrojem, jehož vývoj nekončí. Bilance jeho uplatnění je pozoruhodná. Tisíce, ne-li desetitisíce publikací jeho přičiněním dosažených nemají konkurenci. V současné době neexistuje přístroj, který by měl takové rezervy. Elektronový mikroskop stojí před novou vývojovou etapou. Zdá se, že se našly technické prostředky, jak posunout jeho parametry, zejména rozlišovací schopnost, výrazně kupředu. Nejnovější technologie na nanometrové úrovni slibují materiály, které nemají v současné době obdobu, studium biologických objektů na submolekulární úrovni přinese poznatky o jejich funkci. Elektronové mikroskopy nové generace budou moci významně k dosažení uvedených dílů přispět., Armin Delong., and Obsahuje seznam literatury
The first author, a high-school student, together with the second author, a project supervisor, presents a simple model of the solidification of liquid wax poured into a cylindrical vessel. The results obtained with the model are tested in a series of experiments carried out inside cylindrical containers of different dimensions. There is a good agreement achieved between theory and experiment. The main goal of this project is to identify and investigate a physical phenomenon which would test and enhance students‘ creativity., Karolína Rezková, Jana Musilová., and Obsahuje seznam literatury
von Humphry Davy ; aus dem Englischen übersetzt von Friedrich Wolff und mit Anmerkungen und einer Vorrede begleitet von Albrecht Thär, Tištěno švabachem, and Converted from MODS 3.5 to DC version 1.8 (EE patch 2018/01/18)
Broomcorn millet (Panicum miliaceum L.) is one of the important C4 crops in the semiarid regions of northern China. It is a close relative of biofuel crop switchgrass. Yet, there is no information on how these crops might respond to a climate change in China. In order to gain insight into such a response, we studied the effect of elevated CO2 concentration (EC) on broomcorn millet. The changes in leaf photosynthesis, chlorophyll fluorescence, morphological parameters, biomass and yield in response to EC [i.e., + 200 µmol(CO2) mol-1] over two years were determined at the open-top chamber (OTC) experimental facility in north China. EC increased net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, transpiration rate, instantaneous transpiration efficiency, effective quantum yield of PSII photochemistry, and photochemical quenching coefficient of fully expanded flag leaves. Maximal quantum yield of PSII photochemistry declined under EC in 2013, but was not affected in 2014. EC significantly decreased intrinsic efficiency of PSII in 2013, but increased in 2014. Leaf nonphotochemical quenching decreased under EC both in 2013 and 2014. EC significantly enhanced the aboveground biomass and yield by average of 31.4 and 25.5% in both years, respectively. The increased yield of broomcorn millet under EC occurred due to the enhanced number of grains per plant. We concluded that photosynthesis of broomcorn millets was improved through increased stomatal conductance in leaves under EC, which led to an increase in height, stem diameter, aboveground biomass, and yield. This study extends our understanding of the response of this ancient C4 crop to elevated CO2 concentration., X. Y. Hao, P. Li, H. Y. Li, Y. Z. Zong, B. Zhang, J. Z. Zhao, Y. H. Han., and Obsahuje bibliografii
ELI Beamlines was an intrinsic part of the SPIE Optics & Optoelectronics conference, which took place in Prague. SPIE industry-focused sessions included a workshop for ELI prospective users, bringing together researchers, who are developing and building the ELI Beamlines facility with members of an aggregation of prospective users of proposed beamlines and end-stations. and Přeček, Martin.