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101.
Sylvia Bonnas Hans-Joachim Ritzhaupt-Kleissl Jürgen Haußelt 《Journal of the European Ceramic Society》2010,30(5):1159-1162
Electrophoretic deposition (EPD) is mostly used for producing moulds and layers. The present work shows the fabrication of ceramic microparts by the use of structured electrodes. As electrode structures euro coins and spinning nozzles were used. Additionally a cost effective and simple method was developed, which allows preserving the original master mould by using microstructured silicone moulds as substrate. This was enabled by coating the silicone moulds with graphite to obtain an electrically conductive surface, required for electrophoretic deposition. 相似文献
102.
Stefan M. Karlsson Sylvia C. Pont Jan J. Koenderink Andrew Zisserman 《International Journal of Computer Vision》2010,90(3):304-312
We investigate the estimation of illuminance flow using Histograms of Oriented Gradient features (HOGs). In a regression setting,
we found for both ridge regression and support vector machines, that the optimal solution shows close resemblance to the gradient
based structure tensor (also known as the second moment matrix). 相似文献
103.
Trehalose Metabolism: From Osmoprotection to Signaling 总被引:1,自引:0,他引:1
Gabriel Iturriaga Ram��n Su��rez Barbara Nova-Franco 《International journal of molecular sciences》2009,10(9):3793-3810
Trehalose is a non-reducing disaccharide formed by two glucose molecules. It is widely distributed in Nature and has been isolated from certain species of bacteria, fungi, invertebrates and plants, which are capable of surviving in a dehydrated state for months or years and subsequently being revived after a few hours of being in contact with water. This disaccharide has many biotechnological applications, as its physicochemical properties allow it to be used to preserve foods, enzymes, vaccines, cells etc., in a dehydrated state at room temperature. One of the most striking findings a decade ago was the discovery of the genes involved in trehalose biosynthesis, present in a great number of organisms that do not accumulate trehalose to significant levels. In plants, this disaccharide has diverse functions and plays an essential role in various stages of development, for example in the formation of the embryo and in flowering. Trehalose also appears to be involved in the regulation of carbon metabolism and photosynthesis. Recently it has been discovered that this sugar plays an important role in plant-microorganism interactions. 相似文献
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Jacques Demongeot Nicolas Glade Andr��s Moreira Laurent Vial 《International journal of molecular sciences》2009,10(8):3420-3441
A number of small RNA sequences, located in different non-coding sequences and highly preserved across the tree of life, have been suggested to be molecular fossils, of ancient (and possibly primordial) origin. On the other hand, recent years have revealed the existence of ubiquitous roles for small RNA sequences in modern organisms, in functions ranging from cell regulation to antiviral activity. We propose that a single thread can be followed from the beginning of life in RNA structures selected only for stability reasons through the RNA relics and up to the current coevolution of RNA sequences; such an understanding would shed light both on the history and on the present development of the RNA machinery and interactions. After presenting the evidence (by comparing their sequences) that points toward a common thread, we discuss a scenario of genome coevolution (with emphasis on viral infectious processes) and finally propose a plan for the reevaluation of the stereochemical theory of the genetic code; we claim that it may still be relevant, and not only for understanding the origin of life, but also for a comprehensive picture of regulation in present-day cells. 相似文献
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Castillo Linda G.; Cano Miguel A.; Chen Sylvia W.; Blucker Ryan T.; Olds Tori S. 《Canadian Metallurgical Quarterly》2008,15(1):43
This study examined the impact of family conflict and intragroup marginalization on acculturative stress in 188 bicultural Latino college students. Results showed that low parental income, low acculturation, perceived family conflict, and perceived intragroup marginalization were related to higher acculturative stress for participants. Intragroup marginalization accounted for a statistically significant proportion of the variance in acculturative stress after all variables were controlled. The findings emphasize the need to recognize culture-specific stressors of college students. Implications for mental health providers are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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