Effects of Pre-exposure Mouse Pituitary with Low-dose ^60Co γ-ray on Growth Hormone （GH） and Body Mass Induced by Subsequent High-dose Irradiation

The pituitary of the B6C3F1 hybrid strain mice were irradiated with 0.05 Gy of ^60Co γ-ray as the pre-exposure dose (D1), and were then irradiated with 2 Gy of ^60Co γ-ray as challenging irradiation dose (D2) at 4h after per-exposure. Body weight and serum growth hormone (GH) were measured at 35th day after irradiation. The results showed that irradiation of mouse testes with 2 Gy of ^60Co γ-ray significantly diminished mousebody weight and level of serum GH (Table). Pre-exposure with a low-dose (0.05 Gy) of ^60Co γ-ray significantly alleviated reductions of mouse body weight and level of serum GH induced by subsequent a high-dose (2 Gy) irradiation (Table). The data suggested that low-dose ionizing irradiation can induce adaptive responses to the harmful effects of pituitary by subsequent high-dose exposure.     

Damage and fracture evaluation of granular composite materials by digital image correlation method

This paper presents the applications of digital image correlation technique to the mesoscopic damage and fracture study of some granular based composite materials including steelfiber reinforced concrete, sandstone and crystal-polymer composite. The deformation fields of the composite materials resulted from stress localization were obtained by the correlation computation of the surface images with loading steps and thus the related damage prediction and fracture parameters were evaluated. The correlation searching could be performed either directly based on the gray levels of the digital images or from the wavelet transform (WT) coefficients of the transform spectrum. The latter was developed by the authors and showed higher resolution and sensitivity to the singularity detection. Because the displacement components came from the rough surfaces of the composite materials without any coats of gratings or fringes of optical interferometry, both surface profiles and the deformation fields of the composites were visualized which was helpful to compare each other to analyze the damage of those heterogeneous materials. The project supported by the National Natural Science Foundation of China (10125211 and 10072002), the Scientific Committee of Yunnan Province for the Program of Steel Fiber Reinforced Concrete, and the Institute of Chemical Materials, CAEP at Mianyang     

如何避免新闻报道中“再度伤害”

新闻媒体等作为一种大众文化的传播工具，在人们的日常生活中扮演着越来越重要的角色。但是，新闻报道中出现的问题也目益增多，新闻报道中的“再度伤害”就是一个典型的问题。笔者通过对典型案例的分析和研究，为避免新闻报道中“再度伤害”提出了建议。     

风险管理在临床护理质量管理中的应用

风险管理是一种管理程序,用于避免和减少行为活动过程中人员受到损害,以保障医疗安全[1].医院风险管理是指对病人、工作人员、探视者可能产生伤害的潜在风险进行识别、评估并采取正确行动的过程[2]. 1提高对临床工作中风险管理的认识     

会放电和“说话”的塔吊

2010年9月2日，新疆喀什地区无线电管理处（下文简称“喀什无管处”）接到喀什新隆建筑集团公司书面材料，申请对建筑工地的塔吊进行无线电检测．起因是当地面建筑工人往塔吊吊钩上挂东西的时候，手掌接触吊钩表面的瞬间产生电击现象，引起人体缩手、后退、跳起、恐慌等本能反应，容易导致作业工人跌倒、坠落、碰伤、强烈刺激等人身伤害．给建筑工人人身安全带来了极大的安全隐患。     

销售员的期望和领导的工作

众多企业都会面临销售员跳槽的困扰,从而带走客户和客户的信息,公司相关的商业机密流失,必然会给企业带来不同程度的伤害.所以很多领导都希望拥有一支相对稳定的销售队伍.     

谈谈X射线保护电路

X射线保护电路是基于环保角度提出的。当显像管阳极高压过高、屏幕亮度过大时,显像管就会产生X射线,伤害人体,所以,大屏幕彩电几乎都设有X射线保护电路,以防止X射线的产生。 X射线保护电路的分类X射线保护电路分“切源式”和“切行式”两类。切源式是指,当阳极高压过高、屏幕亮     

港湾回归华为任正非 能否再次驾驭李一男

2000年选择离开华为的李一男已经伤害过了华为一回，这一次，任正非有把握不被李一男再次伤害？