This paper mainly introduces the origin and development of the slit-lamp microscope, the basic structure, working principle and test methods, focuses on diffuse illumination, direct focal illumination, indirect illumination, retro illumination, zone of specular reflection and slit-lamp filter used in the optical inspection, to provide the reference for clinical general optometry practitioners and using slit-lamp microscope widely and standardized.
Lighting ; instrumentation ; Ophthalmology ; instrumentation

Tropical medicine is defined by an association with geographic location,and it is a branch of medicine integrating preclinical medicine,clinical medicine and preventive medicine and investigating the diagnosis,treatment and prevention of diseases of tropical and subtropical zones.Military tropical medicine is a new interdiscipline based on tropical medicine and military medicine.With the improvement of health condition and the development of global economy,some tropical infectious diseases have been gradually controlled.However,factors such as increasingly frequent international communication and extreme changes in global climate induced by overproduction activity of human are leading to a redistribution of infectious diseases,which inevitably has impact on military strategies and tactics.This article reviews the past and prospect of military tropical medicine.

Hyperoxia, including hyperbaric oxygen (HBO) and high-concentration oxygen (HO), has an important therapeutic effect on various ophthalmological diseases, such as retinal vein occlusion, ischemic optic neuropathy and central serous chorioretinopathy. However, excessive inhalation of oxygen of high-concentration or high atmospheric pressure can cause damage of ocular tissue, in which the lens opacity and retinopathy of prematurity (ROP) are the most common complications following hyperoxia exposure. At present, the pathogenesis of hyperoxia-induced ocular injury is still unclear thoroughly, and it may be related to oxidative stress, lipid peroxidation and inflammation. This article reviewed the current advance in the mechanism and the potential prevention of hyperoxia-induced the lens,retina and other ocular injuries.

The paper discusses whether to maintain nonhealthy foetus,the bearing control of patients with hereditary diseases,the aim to apply the technique to distinguish foetus' sex and personal morals and social ethical problems for health staff to do that,points out that the technique can be applied only to check hereditary diseases as to be benefit to bearing good child and arising people's quality ,and the techique should be controlled properly as not to serve for feudal ethic.

6 years. Conclusions The total gastrectomy D 2 or D 2 + with Roux en Y anastomisis procedure for the upper portion carcinoma of stomach can resect the lymph nodes completely, and postoperative complications are reduced. If the indications and techniques could be standerized, the postoperative 5 years survival rate might be increased.

The severe acute respiratory syndrome (SARS) has been spreading in nearly 30 countries and regions worldwide recently. In response to its outbreak, many laboratories worldwide collaborated to identify the causative agent of SARS. A new type of coronavirus(named SARS CoV)has been isolated consequently, and the complete genomic sequences of the SARS CoV have been published. It is very important, at this stage, to deeply investigate the functional genome of SARS CoV with modern molecular techniques. As a new gene silencing method at RNA level, the recently established RNA interference will be a useful approach for the studies of SARS CoV genome.

Objective: To determine Stachydrine hydrochloride in Chanfukang Granules by HPLC. Methods: The determination was performed by HPLC after the substance being extracted through strong acidic positive resinoid.Results: The average recovery was 99.05 with RSD of 1.65%.Conclusion: The method is accurate and provides a certain evidence for controlling the quality of Chanfukang Granules.

Objective: To establish the determination method of adenosine in Compound Houtou Capsule. Methods: HPLC was performed to determine adenosine on DISCOVERY column, using methanol-0.05 mol/L potassium dihydrogen phosphate solution (13∶87,v∶v) as a mobile phase and detection wavelength at 259nm.Results: The linearity of this method was good, and the average recovery was 100.72%, RSD =0.22%. Conclusion: This method was simple and accurate, and available for the quality control of Compound Houtou Capsule.