复方海鳗鱼皮明胶改善缺铁性贫血活性的研究

本文研究了复方海鳗鱼皮明胶(Fufang Pike Eel Skin Gelatin,FEG)对大鼠缺铁性贫血的改善作用,旨在找到一种新型的复方补血品。本文采用热提法制备海鳗鱼皮明胶,配合当归、白芍、川芎、黄芪、炒山楂、制首乌和熟地黄七种中药材熬制得到FEG。采用传统的低铁饮食辅助尾静脉放血的方法建立缺铁性贫血(Iron Deficiency Anemia,IDA)模型,将IDA大鼠随机分成模型组、FEG和复方阿胶高低剂量组。灌胃30 d,通过测定大鼠的血红蛋白(Hb)、红细胞数(RBC)、血清中的铁(SI)、铁蛋白(SF)和可溶性转铁蛋白受体(Soluble Transferrin Receptor,s Tf R)浓度等指标以及肝脏HE染色和骨髓涂片评价其补血效果。结果表明,FEG高剂量组能够显著提高IDA大鼠的RBC(p0.01),降低网织红细胞数(p0.05)、肝脏(p0.01)、脾脏(p0.05)和肾脏系数(p0.01),缓解骨髓异常增生和肝组织紊乱;使Hb浓度由77.21 g/L提高到175.86 g/L;使SI和SF浓度分别升高了2.9和0.6倍,s Tf R浓度降低了19.42%。复方海鳗鱼皮明胶能够有效地改善缺铁性贫血。     

NCl(a~1Δ)自猝灭对NCl(a~1Δ)/I激光能量提取的影响

利用连续流平面型光腔动力学模型对NCl(a1Δ)/I 激光体系进行了模拟计算,探讨了温度在300 K 时NCl(a1Δ)自猝灭对NCl(a1Δ)/I激光能量提取的影响。计算结果表明,NCl(a1Δ)自猝灭反应对光腔位置的选取、功率密度沿流动方向的分布和总输出功率都有较大的影响。其中,光腔位置的可选范围大大缩短,在较小的初始HI粒子数密度和适当的输出镜反射率下总输出功率大幅度降低,而随着HI粒子数密度的增加,NCl(a1Δ)自猝灭对总输出功率的影响逐渐减小。     

An expanded perspective on children's mental health.

Comments on three articles (see records 2005-11115-003, 2005-11115-004, and 2005-11115-005) on the status of children's mental health services in the United States, which appeared in the September 2005 issue of the American Psychologist. The current authors suggest that, although this series of articles provides important information, the articles fall short in meeting the mark of comprehensively describing the solutions necessary to effectively address the crisis facing children's mental health in this country. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

整函数与亚纯函数的复合增长性的性质

本文得到如下结果: 1)设g是超越整函数,且T(r,g)=O(logr)~2),则■T(r,g)/logM(r,g)=1 2)设f是级为λ_f(0<λ_f<∞)的超越亚纯函效,g为超越整函数,且T(r,g)=O(logr)~2),则■logT(r,f(g))/T(r,g)=λ_f。     

Combined treatment for children with learning disorders.

The causes of learning disorders are numerous and, although some learning difficulties can be remedied by special educative measures only, many such problems, especially when they are more severe represent a disorder of the total personality. In such a case a diagnosis must be established by a team of different specialists. After a careful evaluation a treatment programme is planned and a choice is made among various specific therapies. Very often the treatment of learning disorders must take into account more or less important emotional factors. A combined approach of psychotherapy and remedial teaching is sometimes essential to attain some success in helping a child. Such a combination of treatments requires close cooperation between psychotherapist and special teacher. Their respective roles have to be frequently clarified and both gain in understanding of the child needs through mutual communication. Following the evolution of a child from two points of view demonstrates more and more clearly how the intellectual processes necessary for learning are subject to inhibiting patterns that are observed in neurotic defense mechanisms against emotional conflicts. In some instances this practical knowledge would be necessary to understand why a child does not profit from remedial measures and to determine how new techniques are to be used to help him. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Distinguishing addiction and high engagement in the context of online game playing

This study considered whether the distinction between core and peripheral criteria for behavioral addiction, previously drawn with respect to computing activities in general, applies in the specific area of Massively Multiplayer Online Game playing. Questionnaire items were administered over the Internet to 442 game players. Factor-analysis of the data supported the previous findings for computing in general. An addiction factor loaded on items tapping previously identified core criteria (conflict, withdrawal symptoms, relapse and reinstatement and behavioral salience) and a (non-pathological) engagement factor loaded on items tapping previously identified peripheral criteria (cognitive salience, tolerance and euphoria). Analysis of response frequencies supported the existence of a developmental process whereby peripheral criteria are met before core criteria. Players who might be considered addicted using a monothetic classification system involving only the core criteria were shown to spend a significantly greater amount of time playing per week than those endorsing only the peripheral criteria. It is concluded that the study supports the idea that it is inappropriate to use some of the previously used criteria for addiction when researching or diagnosing computer-related addictions. Implications of the present findings for Internet-mediated data collection methodologies are also discussed.     

Effects of sintering temperature on microstructure, nitrogen deficiency and densification of spark plasma sintered Mn3Cu0.5Ge0.5N

Single-phase Mn₃Cu_0.5Ge_0.5N bulks were prepared by spark plasma sintering (SPS) in nitrogen atmosphere at different sintering temperatures, and the effects of sintering temperature on microstructure, nitrogen deficiency and densification were studied. It was found that the densification is accompanied by the thermal decomposition of Mn₃Cu_0.5Ge_0.5N. Nitrogen deficiency and porosity due to the thermal decomposition of the compound do not increase with increase of the sintering temperature; the nitrogen deficiency from decomposition is compensated by the diffusion of nitrogen atoms from the N₂ atmosphere. When the two processes reach the balance, minimum nitrogen deficiency of Mn₃Cu_0.5Ge_0.5N is achieved together with the highest densification.     

碘掺杂聚苯胺催化合成乙酸叔丁酯

以碘掺杂聚苯胺为催化剂,对叔丁醇与乙酸酐之间的酰化反应进行了研究,考察了反应温度、反应时间、催化剂质量分数以及酐醇摩尔比对乙酸叔丁酯收率的影响。实验结果表明,碘掺杂聚苯胺有着较好的催化活性,当反应条件为:反应温度为55℃,反应时间为6 h,酐醇摩尔比为1∶1,催化剂质量分数为7.0%时乙酸叔丁酯的分离收率可达到87.6%,且所得产品无色透明。产品经红外光谱进行了表征。     

论城市生活污水资源化治理

水质污染与水资源紧缺是当前社会经济发展中亟待解决的两大课题,也是可持续发展战略实施中面临的重大问题,把城市生活污水做为一种资源,变废为宝,既解决了江河湖泊水质污染问题,又缓解了水资源紧缺的矛盾,可以收到一途多用的良好效果。本文在分析了我国水资源和水质污染状况的基础上,提出了城市生活污水资源化治理的新思路,进行了有益的探索。