The results showed the lowest spermicidal concentration was 1. 56 ±0. 13 mg/ml within 20 seconds and 0. 73±0. 07 mg/ml within 120 seconds, which is much lower than that of NP-9(P<0. 01 ). KF-950 can inhibit the sperm mean halo rate and diameter significantly.

Sperm samples were collected from 3 normal fathers, aged 25～35 years old. Each sample was divided into six groups, ie the untreated and the 5 spermicides treated (chlorheridine 2mg/ml, MN-863 0.2mg/ml, Drug Ⅲ 0.05mg/ml, Ico 0.1mg/ml, NP-9 0.25 mg/ml).

The results show that the radius of water droplet of NP-9/hexanol/heptane/zinc nitrate solution microemulsion at 308 K and 318 K is 1.86 nm and 2.33 nm respectively, and such microemulsion is a good medium for the synthesis of nanoparticles.

The results showed the preparation condition were as follows: added 0.002 mol surfactant NP-9 and 17 mL 1-hexanol into 70 mL n-heptane,then added 8 mL dimethyl oxalate and zinc nitrate which concentration was 0.02 mol/L and 0.015 mol/L respectively,the microwave power and duration was 50~250 W and 40 min,the zinc oxalate was obtained after separation,the calcinations temperature and time was 500℃ and 1 h respectively.

结果表明:将0.002 mol的表面活性剂NP-9和17 mL正己醇加入70 mL正庚烷中,再加入8 mL 0.02mol/L草酸二甲酯和0.015 mol/L硝酸锌的混合水溶液,制成微乳液,以功率为50~250 W的微波辐射40 m in,经分离得到草酸锌; 将所得草酸锌在500℃焙烧1 h,能够得到纳米ZnO;

A more general mathematical analysis of the kinetics of polycondensation-depolycondensation reactions is given in the article. Three different types of reactions are considered, namely, (1) reactions between molecules AB and AB, (2) reactions between molecules AA and BB, (3) reactions between molecules AA and BC. One of the condensation products is assumed (without loss of generality) to be water.For reactions of the first type, [p_n], the number of molecules of the n-mer (AB)_n, obeys the following Flory distribution:...

A more general mathematical analysis of the kinetics of polycondensation-depolycondensation reactions is given in the article. Three different types of reactions are considered, namely, (1) reactions between molecules AB and AB, (2) reactions between molecules AA and BB, (3) reactions between molecules AA and BC. One of the condensation products is assumed (without loss of generality) to be water.For reactions of the first type, [p_n], the number of molecules of the n-mer (AB)_n, obeys the following Flory distribution: [p_n]=N_0p~(n-1)(1-p)~2 where N_0 denotes the total number of AB segments (including the unreacted monomers). and p, as defined by is a measure of the degree of condensation. It is shown that p is the solution of the following differential equation: dp/dt=k/2N_0(1-p)~2-k_(-1)p[H_2O] where K and k_(-1) are velocity constants of condensation and hydrolysis respectively, and [H_2O] denotes the number of water molecules. Three special cases are discussed.For reactions of the second type, three different types of condensation products are possible besides water; they obey the following distributions: [p_(2n)]=2N′_0r~(n-1)p~(2n-1)(1-p)(1-rp) [p′_(2n-1)]=N′_0r~(n-1)p~(2n-2)(1-p)~2 [p″_(2n-1)]=N′_0r~(n-2)p~(2n-2)(1-rp)~2 where N′_0 and N″_0 denote the total number of segments AA and BB respectively, r denotes the ratio N′_0/N″_0, and p, as defined by is the solution of the following differential equation: dp/dt=kn′_0/r(1-p)(1-rp)-k_(-1)P[H_2O]For reactions of the third type, six different types of condensation products are possible besides water; they obey the following distributions: [P′_(2n)]=NP~(n-1)q~n(1-p/2-q/2)(1-p) [p″_(2n)]=Np~nq~(n-1)(1-p/2-q/2_(?))(1-q) [p_(2n-1)=Np~(n-1)q~(n-1)(1-p/2-q/2)~2 [p′_(2n-1)]=N/4p~(n-2)q~n(1-p)~2 [p″_(2n-1)]=N/4p~nq~(n-2)(1-p)~2 [p′″_(2n-n)]=∈(n)N/4p~(n-1)q~(n-1)(1-p)(1-q),where N denotes either the total number of segments AA or that of BC, while p and q, as defined by satisfy the following set of differential equations: dp/dt=k′N/2(1-p)(2-p-q)-k′_(-1)p[H_O] dq/dt=k″N/2(1-q)(2-p-q)-k″_(-1)q[H_2O]

A synchronised accumulation technique is used to achieve a resolution of up to 10-13 cm for the oscillating amplitude of a laser interferometer. Such a technique is applied to observe the 60.4 Hz gravitational radiation which is possibly emitted from the pulsar NP 0532 of the Crab Nebula. Present experiments show that no such signal is received.

In this paper", the further development of a new type of general-purpose Supercomputer- "Cellular Vector Computer of Vertical and Horizontal Processing" (CVCVHP) from "with Common Memory "to "with Virtual Common Memory", is diseussed. The subsystem of "CVCVHP with Virtual Common Memory" is equivalent to a multidimentional array processor.Starting from the "Vector Computer of Vertical and Horizontal Processing" (m×np type) based on small and medium scale integrated circuits, we briefly describe "CVCVHP...

In this paper", the further development of a new type of general-purpose Supercomputer- "Cellular Vector Computer of Vertical and Horizontal Processing" (CVCVHP) from "with Common Memory "to "with Virtual Common Memory", is diseussed. The subsystem of "CVCVHP with Virtual Common Memory" is equivalent to a multidimentional array processor.Starting from the "Vector Computer of Vertical and Horizontal Processing" (m×np type) based on small and medium scale integrated circuits, we briefly describe "CVCVHP with Common Memory" (m X n type, m × np type), which is introduced because of the development of very large scale integrated circuits. This, is a new type of vector computer which employs a multiple data stream and multiple instruction stream architecture.On this basis, for the sake of raising the speed of a system by largely increasing the number of cells, in this paper we emphasize a new type of supercomputer, i.e. CVCVHP with "Virtual Common Memory in Addition to Common Memory". This system may consists of thousands of cells. And we conclude that its subsystem is equivalent to a multidimentional array processor. Seen from another angle, we propose a class of methods of using a supercomputer which consists of thousands of "microprocessors" (more exactly, the "cells").The system presented also has such features: from the view of physical organization it appears as a multidimentional array processor system, but from the view of function (i.e. the view of users) it is a vector computer. The memory is distributed physically, but is concentrated from the view-point of users.The following problems of this new type of supercomputer system are also discussed: language, principal algorithms, corresponding principal instructions, principal functions of the cell, '' Common Memory'', synchronizing, the number of data transmission lines, the number of transmission steps, and so on.Finally, we consider a simplified system, the language of which is completely consistent with the "High Level Vector Language" of a normal vector computer.The system we propose in this paper may constitute a series of computer complex of various sizes.