periods are designated as main group elements, and the members of the other groups are called transition or inner transition elements. (在元素周期表中) ,水平的每一排元素组成了一个周期。应当注意的是,周期的长短是有变化的。首 先是一个含有 2 种元素的极短周期,接着是两个短周期,每一周期含有 8...
Rational groupsWe call a finite group irrational if none of its elements is conjugate to a distinct power of itself. We prove that those groups are solvable and describe certain classes of these groups, where the above property is only required for $p$-elements, for $p$ from a prescribed ...
复数型名词 You can refer to the weather, especially wind and rain, as the elements. 天气 (尤指风雨) The area where most refugees are waiting is exposed to the elements. 大部分难民滞留的地区暴露在风雨之中。 8 习语If you say that someone is in their element, you mean that they are in...
its compounds,a and b are fitting constants,n is the periodic ordinal number,has been suggested in this paper:The formula can be used in calculating twenty quantitives or more of the element and its compounds in the same group of the element periodic table,and better result.can be obtained...
of EP0992848 A peel-apart photosensitive element comprising in order: a strippable cover sheet; a photosensitive layer; an essentially non-photosensitive, non-tacky organic layer comprised of block or random polymers of at least one aromatic polymer and at least one non-aromatic monomer; and a ...
Little is known about viruses in oxygen-deficient water columns (ODWCs). In surface ocean waters, viruses are known to act as gene vectors among susceptible hosts. Some of these genes may have metabolic functions and are thus termed auxiliary metabolic g
Toeplitz C~*-algebras on ordered groups and their ideals of finite elements Proceedings of the American Mathematical SocietyXu, Q., Chen, X., Toeplitz C*-algebras on ordered groups and their ideals of finite elements, Proc. ... QCX Xu - 《Proceedings of the American Mathematical Society》 ...
An AUTOSAR adaptive software component uses communication interfaces and ports defined in the AUTOSAR standard, including adaptive service interfaces and required and provided ports. In the AUTOSAR Dictionary, communication interfaces appear in a tree format. To access service interfaces and their propert...
In this work, we present a procedure to back-trace the debris, reconnecting them to their original configuration. To this end, we compute the proper elements, namely dynamical quantities which stay nearly constant over time. While the osculating elements might spread and lose connection with the ...
The proteins of the trithorax and Polycomb groups maintain the differential expression pattern of homeotic genes established by the early embryonic pattern... G Rank,M Prestel,R Paro - 《Molecular & Cellular Biology》 被引量: 808发表: 2002年 Polycomb repression: from cellular memory to cellular ...