Effects of radiation therapy on growing long bones

Characteristic radiographic changes were seen in six of 14 children who received radiation therapy to the epiphyseal plate of a long bone. These changes, which include metaphyseal sclerosis, metaphyseal fraying, and epiphyseal plate widening, resemble rickets. In three patients, these changes were followed by development of a broad metaphyseal band of increased density. The absence of metaphyseal changes may indicate sterilization of cartilage cells and may be predictive of significant limb shortening.     

搪瓷用含钛热轧高强钢板的显微组织和力学性能研究

热水器搪瓷内胆具有使用寿命长、无毒无害以及高耐蚀等特点,得到了广泛的应用,可替代传统的不锈钢、热镀锌和塑料等材料制作的内胆。为了满足成型、焊接和涂搪等要求,制作搪瓷内胆的钢板必须具有高强度以及优良的成型性、焊接性和涂搪性。研究表明,含钛热轧高强钢中钛主要以碳化物和氮化物的形式存在,不仅具有优良的焊接性和涂搪性,在焊接过程中和高温烧成时由于钛的析出物能有效地抑制晶粒长大,保持较高的强度。通过优化碳、锰和钛等元素的匹配,开发了4个不同屈服强度级别(210 MPa,245 MPa,330 MPa和360 MPa)的热轧搪瓷钢板。     

A randomized trial of brief interventions for problem and pathological gamblers.

Limited research exists regarding methods for reducing problem gambling. Problem gamblers (N = 180) were randomly assigned to assessment only control, 10 min of brief advice, 1 session of motivational enhancement therapy (MET), or 1 session of MET plus 3 sessions of cognitive-behavioral therapy. Gambling was assessed at baseline, at 6 weeks, and at a 9-month follow-up. Relative to assessment only, brief advice was the only condition that significantly decreased gambling between baseline and Week 6, and it was associated with clinically significant reductions in gambling at Month 9. Between Week 6 and Month 9, MET plus cognitive-behavioral therapy evidenced significantly reduced gambling on 1 index compared with the control condition. These results suggest the efficacy of a very brief intervention for reduction of gambling among problem and pathological gamblers who are not actively seeking gambling treatment. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

添加彩色果蔬面制品的工艺研究

对彩色果蔬面制品的工艺以及护色技术进行了研究。实验表明,以柠檬酸0.05%、D-异抗坏血酸钠0.01%、没食子酸丙酯0.06%、大豆磷脂0.12%、食盐1%作为添加剂在和面时添加进果蔬面制品,然后按照工艺进行加工,可以得到有光泽、美味且营养丰富的果蔬面制品。     

Cerebro-protective effects of ENA713, a novel acetylcholinesterase inhibitor, in closed head injury in the rat

Focal ischemic brain damage and diffuse brain swelling occur in severe cases of traumatic head injury. Ischemia decreases brain acetylcholine (ACh) levels and head trauma upregulates acetylcholinesterase (AChE) in experimental animal models. The present study determined whether a brain-selective AChE inhibitor, ENA713, given once, up to 2 h after closed head injury (CHI) could reduce the vasogenic edema and accelerate recovery from neurological deficits induced by the injury in rats. ENA713 1-5 mg/kg produced a dose-related inhibition of AChE ranging from 40-85% in the cortex and hippocampus. Doses of 1, 2 and 5 mg/kg, significantly reduced the motor and neurological deficits and speeded recovery, as indicated by measurements made 7 and 14 days after injury. The two larger doses were still effective when injected 1 or 2 h after CHI. The acceleration by ENA713 of recovery of motor function was independent of its reduction in body temperature and was prevented by the simultaneous injection of mecamylamine (2.5 mg/kg), but not by scopolamine (0.2 or 1 mg/kg). Edema in the contused hemisphere (24 h after injury) and disruption of the blood brain barrier (4 h after injury) were significantly reduced (about 50%) by doses of 2 and 5 mg/kg, but not by 1 mg/kg. The data support the hypothesis that ENA713 exerts a neuroprotective effect in brain injury by preventing the decrease in cholinergic activity in cerebral vessels and in neurones.     

局部相对位姿空间内轮式月球车的避障策略学习

提出了一种轮式月球车的避障学习方法。首先列出了BH2月球车的动力学方程,并将避障行为解释为沿子目标点行走的过程。然后在月球车视觉局部范围内进行避障策略学习,选择车体、子目标点和障碍之间的相对位置矢量为学习过程的状态量,使策略学习对环境变化有鲁棒性;选择车轮的转向力矩为控制输入,降低了学习复杂度。实验证明此方法对环境变化有很好的适应能力。