蛋白氨基酸衍生化条件的正交试验

孟庆国，张铁垣．蛋白氨基酸衍生化条件的正交试验．数理统计与管理，１９９８，１７（３），４～６．蛋白氨基酸经酯化和酰化两步衍生化之后，才能进行气相色谱分析，影响衍生化程度的因素主要是酯化时间、酯化温度、酰化时间和酰化温度。用正交试验研究了上述四因素对氨基酸衍生化程度的影响，正交表采用Ｌ９（３４），使实验次数由传统实验的８１次减少为９次，实验指标为相对重量校正因子Ｓ′Ｗ（内标物为鸟氨酸）。实验结果表明：对精氨酸、色氨酸和蛋氨酸来说，酰化时间的影响最大，酰化时间越长，对精氨酸和色氨酸的衍生化越有利，而蛋氨酸则正好相反，另外三因素对上述三种氨基酸衍生物的Ｓ′Ｗ影响较小。其余１６种氨基酸的Ｓ′Ｗ在９次实验中变化不大。     

On the Derivations of Filiform Leibniz Algebras

The algebras of derivations of naturally graded Leibniz algebras are described. The existence of characteristically nilpotent Leibniz algebras in any dimension greater than 4 is proved.__________Translated from Matematicheskie Zametki, vol. 77, no. 5, 2005, pp. 733–742.Original Russian Text Copyright ©2005 by B. A. Omirov.     

A Class of Non-degenerate Solvable Lie Algebras and Their Derivations

The author constructs a class of indecomposable non-degenerate solvable Lie Algebras corresponding to a Cartan matrix A over the field of complex numbers and we determine all their derivations.     

On the Boltzmann-Grad limit for the Broadwell model of the Boltzmann equation

An example is given of a model dynamics for which the Broadwell model of the Boltzmann equation seems to appear in the formal stage of the Boltzmann-Grad limit, but actually does not.     

Non-Abelian Cohomology of Groups

Following Guin's approach to non-abelian cohomology [4] and, using the notion of a crossed bimodule, a second pointed set of cohomology is defined with coefficients in a crossed module, and Guin's six-term exact cohomology sequence is extended to a nine-term exact sequence of cohomology up to dimension 2     

Computer derivation of algebraic equations associated with runge-kutta formulas

The derivation of algebraic non-linear equations associated with Runge-Kutta formulas increases in complexity as the order of these formulas increases. To overcome this difficulty various operational methods have been devised. But these methods are quite involved and there also exists the possibility of human errors which may be difficult to detect. The aim of this paper is the derivation of these algebraic equations through a digital computer, the IBM 7094, using Fortran IV. The technique employed is based upon a mathematical method established by the first author. With the advent of the space age there arose a continuous need for Runge-Kutta formulas of higher and higher orders. It seems that the computer offers the best, if not the only, hope in keeping up with these needs.     

Genetic Volterra algebras and their derivations

The present paper is devoted to genetic Volterra algebras. We first study characters of such algebras. We fully describe associative genetic Volterra algebras, in this case all derivations are trivial. In general setting, i.e., when the algebra is not associative, we provide a su?cient condition to get trivial derivation on generic Volterra algebras. Furthermore, we describe all derivations of three dimensional generic Volterra algebras, which allowed us to prove that any local derivation is a derivation of the algebra.     

柱前衍生GC-MS法测定氟乙酰胺鼠药

采用五氟苄基溴(PFBBr)衍生化和GC—MS分析方法对氟乙酰胺鼠药进行了检验,考察和优化了衍生化条件及分析参数等因素,线性范围为2．5～50μg／mL,相关系数r=0．9986,血液样品加标平均回收率为76．2％,测定结果的相对标;准偏差为3．07％。