we will explore the meanings behind these words from various perspectives.alpha,beta,omegaStarting with alpha, this letter has gained prominence in the scientific community where it is used to denote the first in a series or rank. In the field of chemistry, the alpha particle is a...
different and are each C.sub.1 -C.sub.4 -alkyl or together possess the carbon atoms required to complete a ring, is reacted with a phosphorus compound of the general formula IV or V ##STR3## where B the meanings stated above, R.sup.1 and R.sup.2 are as defined above and X....
(OR4)-CH.R1.R2 in which R4 is alkyl, haloalkyl, nitroalkyl, alkenyl, cycloalkyl, aryl, aralkyl, haloaryl, haloaralkyl or nitroaryl of 1-24 carbon atoms, and R1, R2 and R3 have the same meanings as R4 or are H; V is H or OH; W is H, CH 3 , Cl or F; Y is CH(-...
关键词: PRESENCE-ABSENCE DATA SPECIES-DIVERSITY COMPONENTS TURNOVER MEANINGS INDEXES ALPHA DOI: 10.1016/j.ecocom.2013.03.002 被引量: 61 年份: 2013 收藏 引用 批量引用 报错 分享 全部来源 免费下载 求助全文 全文购买 Elsevier Elsevier (全网免费下载) 掌桥科研 dx.doi.org AGRIS 查看更多 相似文献 ...
The invention relates to analogues of 8-D-homoarginine-vasopressin of the general formula in which the meanings are: X L-O-methyltyrosine L-p-ethylphenylalanine D-p-ethylphenylalanine L-p-methylphenylalanine or D-p-m... ZDENKO PROCHAZKA,IVO BLAHA,MOROSLAVA ZERTOVA,... 被引量: 2发表: ...
During action observation, several visual features of observed actions can modulate the level of sensorimotor reactivity in the onlooker. Among possibly relevant parameters, one of the less investigated in humans is the visual perspective from which acti
the carbon atoms required to complete a ring, is reacted with a phosphorus compound of the general formula IV or V ##STR3## where B the meanings stated above, R.sup.1 and R.sup.2 are as defined above and X.sup. ⊖ is a halide ion, in the presence of a base. The alpha,...
The optimal goal of con- servation is to protect the maximum number of species and habitats with limited funds; hence, unique communities are important for optimizing conservation efforts and beta diversity may be as important as alpha diversity42. The spatial component represents the role of ...
pregna-1,3,5(10)-trien-17 beta -ols with a 21,16 alpha lactone ring and a long chain substituent in the 11 beta position of general formula (II) where R<11> is a 6 to 17 C straight chain alkyl group and R<3> and R<13> have the meanings more closely given in the description...
Navigating the multiple meanings of β diversity: a roadmap for the practicing ecologist Ecol. Lett., 14 (1) (2011), pp. 19-28, 10.1111/j.1461-0248.2010.01552.x View in ScopusGoogle Scholar Baselga, 2010 A. Baselga Partitioning the turnover and nestedness components of beta diversity Glo...