电位滴定法测定PB-9M中硬脂酰二乙醇胺含量

PB-9M试样溶解在冰乙酸溶剂中,以复合非水pH玻璃电极为测量电极,用高氯酸-冰乙酸标准溶液进行电位滴定,测定其中的硬脂酰二乙醇胺,借助于电位突跃确定其反应终点。与容量滴定法相比,该法具有快捷、准确、重现性好等特点,完全可取代传统的容量滴定法。     

Mo(Ⅵ)-DBPF-PVA分光光度法测定尿蛋白

提出了一个借钼(VI)-4,5-二溴苯基荧光酮(DBPF)-聚乙烯醇(PVA)与蛋白质显色反应光度法测定微量尿蛋白的分析方法.在pH=2.0,牛血清蛋白能与Mo(VI)-DBPF- PVA形成紫红色络合物,最大吸收波长为570nm,牛血清蛋白含量0-5μg/mL范围内服从Beer定律.尿液中其它成份不干扰测定.用拟定的方法测定人尿蛋白,获得满意结果.     

拟南芥和水稻Cel基因家族的生物信息学分析

运用生物信息学方法对拟南芥和水稻各25个Cel基因的系统进化、基因结构、蛋白质结构等进行分析。结果表明,50个Cel属于糖苷水解酶家族9,分为3个亚家族(GH9A、GH9B、GH9C),GH9C是进化的祖先;Cel基因编码的蛋白质均有保守的GH9催化结构域,GH9A有跨膜结构域和胞质结构域,GH9B有信号肽,GH9C有跨膜结构域、纤维素结合结构域和信号肽;GH9A和GH9C在基因结构和保守基序显示较高的保守性,GH9B具有多样性;Cel基因编码的蛋白质为两性稳定蛋白,二级结构主要是无规则卷曲和α-螺旋,亚细胞定位于细胞膜或细胞壁,大部分是分泌蛋白,有1个跨膜螺旋。     

NAND Flash和嵌入式处理器S3C44B0X的接口设计

嵌入式系统中,微处理器与Flash存储器的接口设计是一个非常重要的环节。本文以低功耗的32位ARM处理器为内核的嵌入式芯片S3C44B0X与Flash芯片K9F2808U0B接口设计为例,具体介绍了嵌入式系统中,微处理器S3C44B0X与Flash存储器的接口电路设计、控制与编程方法,提出了一个性价比较高的解决方案。     

略论体育赞助及其效益

从九运会体育赞助情况入手，采用文献法和数理分析法，简要分析体育赞助的起源和发展，着重叙述了体育赞助的效益。     

Identification of ICD codes suggestive of child maltreatment

Objective

In order to be reimbursed for the care they provide, hospitals in the United States are required to use a standard system to code all discharge diagnoses: the International Classification of Disease, 9th Revision, Clinical Modification (ICD-9). Although ICD-9 codes specific for child maltreatment exist, they do not identify all maltreatment-related hospital and emergency department discharges. To increase the usefulness of medical data for public health surveillance of child maltreatment, this project sought to identify ICD-9 codes that are suggestive of child maltreatment.

Methods

After review of the literature and discussions with experts, injuries and conditions that should raise suspicion of child maltreatment (physical or sexual abuse or neglect) were identified and a list of corresponding ICD codes was compiled. Using a statewide electronic database of hospital discharges and emergency department (ED) visits for the year 2000, visits by children assigned these ICD codes were identified, a sample of visits was selected, and medical records were reviewed to assess the circumstances of the injury or illness that led to the visit. Based on information in the medical record, the injury or illness was classified as maltreatment-related, or not.

Results

There were 3,684 visits selected for review. Of these, 2,826 records were reviewed and classified; 1,200 (43%) records met the criteria for being maltreatment-related, 1,419 (50%) contained adequate information indicating the injury/condition was not likely maltreatment-related, and 207 (7%) records did not contain enough information to classify. Sixty-eight ICD codes had >66% of visits classified as maltreatment-related, the a priori criteria for a code to be considered suggestive of maltreatment. Codes suggestive of maltreatment include specific fractures, burns, and injuries of undetermined intent, among others.

Conclusion

Several ICD codes were found that, when used with age restrictions and other specific exclusion criteria, are suggestive of maltreatment. This information may increase the usefulness of hospital discharge data for public health surveillance of child maltreatment.

Practice implications

Use of these suggestive codes facilitates identifying conditions and injuries that are likely maltreatment-related in hospital discharge and ED visit data. When used in conjunction with ICD maltreatment-specific codes, these suggestive codes may enhance the use of medical data for monitoring child maltreatment trends.     

南满铁路管辖权的丧失与东北三省的沦陷

＂九·一八＂事变爆发后,东三省沦陷,其原因不止是不抵抗的政策。通过对比,在探讨原有史学的观点和当时南满铁路的状况,以及日本的相关政策与措施和不可否认的史实,分析证实南满铁路的重要性。得出＂无南满铁路的‘主权’,导致东北三省沦陷＂的结论。     

析“90后”大学生特点对思想政治教育工作的影响

＂90后＂大学生作为新时代的代表,具有鲜明的时代特征,对其进行思想政治教育工作必须不断更新教学理念,创建符合该时代特征的教学模式。本文首先对＂90后＂大学生的思想行为特点加以分析,其次指出了影响＂90后＂大学生思想行为的主要因素,并结合这些因素提出了相应的对策和建议,为发展和完善＂90后＂大学生思想政治教育工作提供参考依据。     

“9.11”事件发生以来的加美关系

加拿大与美国两国之间的关系一直以来发展曲折而又复杂。双方在相互依存中又矛盾冲突不断,特别是"9.11"事件使两国关系蒙霜趋冷。"9.11"事件发生以来,在加美双方尤其是在加拿大历届政府的共同努力下,双边关系得到缓和和改善,但分歧与不协调依然存在。展望未来,加美两国将在"合作为主、摩擦为次"的交织中缓慢发展。