继续坚持韬光养晦,有所作为的外交战略方针

20世纪80年代末90年代初,国际局势风云突变,中国外交面临前所未有的巨大压力.邓小平同志基于对中国国情的深刻认识和对世界局势的全面把握,提出了韬光养晦的外交战略思想.这一方针以争取和平的外部环境,集中精力发展壮大自己为主旨.时至今日,韬光养晦政策已成为中国对外战略方针的重要组成部分,也是理解和把握中国外交政策的关键词之一.当前,中国与世界的关系发生了历史性变化,国际国内两个大局互动日益紧密,对韬光养晦政策的正确理解无疑将更有助于把握当前的国际形势.     

Degradation of fenitrothion by Bacillus stearothermophilus adhering to silica

Spindle cell hemangioendothelioma (SCH) is a rare vascular neoplasm characterized by cavernous spaces, thrombi, phleboliths, and spindle cells. The lesions may arise at sites of vascular injury. We describe a 38-year-old man with multiple subcutaneous and penile SCHs. Patients with SCH should be screened for Maffucci's syndrome.     

Effects of pentoxifylline on leukocyte adhering to endothelial cell

We have investigated the rates of glucose consumption, lactate production and insulin secretion by mouse insulinoma beta TC3 cells exposed to high glucose and oxygen concentrations in the range of 132 mmHg (normoxia) to 0 mmHg (anoxia). The rates of glucose consumption and lactate production, and the yield of lactate on glucose were 6.4 +/- 0.2 nmol/h - 10(5) cells, 7.7 +/- 0.5 nmol/h - 10(5) cells, and 1.2 +/- 0.1 respectively, at oxygen concentrations between 132-25 mmHg. These values increased gradually as the oxygen concentration was reduced below 25 mmHg, reaching a maximum value of 12.8 +/- 0.4, 23.8 +/- 1.1, 1.9 +/- 0.1 respectively, at complete anoxia. Insulin secretion remained constant at 360 +/- 24 pmol/h - 10(8) cells at oxygen concentrations between 132-7 mmHg, but was inhibited at lower oxygen concentrations, dropping to 96 +/- 24 pmol/h - 10(8) cells at 0 mmHg. The rate of insulin secretion in the presence of high glucose under anoxia was significantly higher than the rate of basal secretion (28.2 +/- 3.0 pmol/h - 10(8) cells) at normoxia. The secretory properties of beta TC3 cells at low oxygen concentrations may have implications in the development of a diffusion-based bioartificial tissue constructs for the long-term treatment of Insulin Dependent Diabetes Mellitus.     

The relationship of cigarette prices and no-smoking bylaws to the prevalence of smoking in Canada

OBJECTIVES: The aim of this study was to analyze the association of cigarette prices and no-smoking bylaws with the prevalence of smoking. METHODS: Data on individual smoking status were taken from two national household surveys in Canada. Current cigarette price, the 1-year and 10-year increase in price, and the extent of local restrictions on public smoking were added to the model. Logistic regression was used to estimate the odds of being a smoker. RESULTS: The odds ratio for being a smoker was 1.21 where no-smoking by-laws were relatively infrequent and 1.26 when cigarettes were relatively inexpensive, after adjusting for individual age, sex, education, and marital status. CONCLUSIONS: Both cigarette prices and no-smoking bylaws are effective in controlling smoking; either alone will likely have less impact than the two measures together.     

高校领导班子坚持民主集中制问题

实践证明 ,高校领导班子坚持民主集中制的情况如何 ,是关系到高校在社会主义现代化建设中的地位及作用发挥程度的大问题。因此 ,笔者拟就这个问题谈几点粗浅看法。一、正确认识高校领导班子在坚持民主集中制方面的优势和存在的问题(一 )高校领导班子在坚持民主集中制方面的优势1 高文化、高知识集团。据了解 ,高校特别是重点高校或普通本科院校中 ,领导班子成员大多是大学以上文化 ,硕士、博士学历已占相当比例 ,基本都具有副高以上职称 ,这是企业或其他基层组织所不能相比的。这种高文化、高知识的集合 ,在认识和研究问题中起点高 ,有深度 …     

A theoretical model study of the influence of fluid stresses on a cell adhering to a microchannel wall

We predict the amplification of mechanical stress, force, and torque on an adherent cell due to flow within a narrow microchannel. We model this system as a semicircular bulge on a microchannel wall, with pressure-driven flow. This two-dimensional model is solved computationally by the boundary element method. Algebraic expressions are developed by using forms suggested by lubrication theory that can be used simply and accurately to predict the fluid stress, force, and torque based upon the fluid viscosity, muoffhannel height, H, cell size, R, and flow rate per unit width, Q2-d. This study shows that even for the smallest cells (gamma = R/H < 1), the stress, force, and torque can be significantly greater than that predicted based on flow in a cell-free system. Increased flow resistance and fluid stress amplification occur with bigger cells (gamma > 0.25), because of constraints by the channel wall. In these cases we find that the shear stress amplification is proportional to Q2-d(1-gamma)-2, and the force and torque are proportional to Q2-d(1-gamma2)-5/2. Finally, we predict the fluid mechanical influence on three-dimensional immersed objects. These algebraic expressions have an accuracy of approximately 10% for flow in channels and thus are useful for the analysis of cells in flow chambers. For cell adhesion in tubes, the approximations are accurate to approximately 25% when gamma > 0.5. These calculations may thus be used to simply predict fluid mechanical interactions with cells in these constrained settings. Furthermore, the modeling approach may be useful in understanding more complex systems that include cell deformability and cell-cell interactions.     

How to write a recruiting policy

Occupational health professionals have an important role to play in ensuring that individuals recruited by any organization are medically capable of performing their required duties in an efficient manner. To achieve this, the physician's knowledge of the workplace should be used to establish the necessary medical standards whilst their occupational health expertise and experience should be called upon to establish the relevant means of objectively assessing attainment of the established criteria. A written policy detailing the procedures, both medical and administrative is essential.     

The effect of a restricted smoking policy on motivation to quit smoking in psychiatric patients

As dissatisfaction with unrestricted smoking in institutional settings has grown, a number of psychiatric facilities have banned smoking. A compromise, restricted smoking, was recently introduced on an inpatient psychiatric unit at a University of Michigan Hospital. The subsequent rescission of the restricted smoking policy enabled us to compare the effects of restricted smoking vs. ad lib smoking on motivation to quit smoking. METHOD: Current smokers admitted to an inpatient psychiatry unit were asked to participate in this study. As soon as possible after intake, the patient completed a smoking history questionnaire, depression and anxiety scales, and a stage of change measure. The stage of change measure was readministered upon discharge from the unit. RESULTS: Repeated measures ANOVA revealed an interaction for Condition (Restricted vs. Ad Lib) by Time (Admission vs. Discharge) for the Action scale, which assesses current level of activity in smoking cessation efforts. Restricted smokers decreased while ad lib smokers increased in motivation over time. CONCLUSIONS: Results suggest that the restricted smoking policy does not have beneficial motivational effects. Alternative strategies for controlling smoking on an inpatient psychiatric unit are suggested.     

Implementing a unit based quality improvement program: one hospital's experience

The continuous enhancement of the quality of patient care is the prime directive of a Nursing Quality Improvement Program. A decentralized approach, using a Unit Based Quality Improvement model, was used in one hospital. In this paper, the author examines the process from conceptualization to implementation and evaluation of the decentralized approach.     

The effect of antibody to Streptococcus mutans in saliva on caries activity and S. mutans adhering

An indirect enzyme-linked immunosorbent assay (ELISA) was used for measuring IgA antibody to whole cell of Streptococcus mutans (serotype c) in saliva. 36 parotid salivary samples of human were collected from two groups: Caries free (CF) and caries sensitive (CS). The result shows that the IgA antibody to S. mutans in CF group was higher than those in CS group (P < 0.05). The saliva antibody was gained from the rabbits by injection with S. mutans (serotype c), and the adhesion of S. mutans--3H on the surface of hydroxylapatite beads treated by rabbit's saliva was measured. The results show that the saliva with immunity could inhibit the S. mutans to adhere on the HA beads (P < 0.05). It means saliva antibody may prevent caries through inhibition of S. mutans from adhesion.