Contributions of the home literacy environment to preschool-aged children's emerging literacy and language skills

This paper reports on a study that examined both the concurrent and logitudinal connections between multiple components of the home environment and indicators of preschool-aged children's literacy and language development. Data were collected from 85 parents and their children at two different times. Results of structural path models indicated that (a) parental literacy habits were positively associated with parental reading beliefs, (b) parental reading beliefs were positively associated with parent-child literacy and language activities in the home, and (c) parent-child literacy and language activities were positively associated with children's print knowledge and reading interest. Parental demographic characteristics were associated with children's expressive and receptive language skills. The results highlight how different components of the home literacy environment are associated with different components of preschool-aged children's literacy and language abilities, findings that become more important as educators and policy-makers look for ways to enhance children's literacy and language development.     

婴幼儿肺炎心肌酶谱检测临床分析及意义

目的 为探讨血清心肌酶谱在婴幼儿肺炎、肺炎心衰、健康儿中变化和临床意义。方法 对40例肺炎心衰患儿、40例普通肺炎患儿及30例健康婴幼儿，进行血清心肌酶谱的检测，分析临床意义。结果 肺炎心衰组心肌酶的阳性率及增高程度与对照组有显著性差异（P〈0．05），普通组与对照组无明显差异（P〉0．05）。结论 血清心肌酶谱可以反映婴幼儿肺炎合并心哀、心肌受损的严重程度。CK-MB增高是判断心肌损害的关键指标。     

ACE基因多态性与妊娠期高血压疾病

妊娠期高血压疾病是妊娠期特有的疾病,也是产科常见病.但至今发病机理仍不清楚,可能是一种多基因决定和受多种环境因素影响的疾病.该文综述了血管紧张素转换酶基因多态性与妊娠期高血压疾病的相关性,以期探知妊娠期高血压疾病的产生机制,寻找妊娠期高血压疾病的早期预防,早期诊断策略.     

婴幼儿肺炎心肌酶谱检测临床分析及意义

目的探讨血清心肌酶谱在婴幼儿肺炎、肺炎心衰、健康儿中变化和临床意义。方法对40例肺炎心衰患儿、40例普通肺炎患儿及30例健康婴幼儿，进行血清心肌酶谱的检测，分析临床意义。结果肺炎心衰组心肌酶的阳性率及增高程度与对照组有显著性差异（P〈0．05），普通组与对照组无明显差异（P〉0．05）。结论血清心肌酶谱可以反映婴幼儿肺炎合并心衰、心肌受损的严重程度。CK-MB增高是判断心肌损害的关键指标。     

β-葡聚糖苷酶对三七皂苷-Fe的转化研究

目的本文首次报道利用工业酶制剂对三七皂苷-Fe进行酶转化的研究。方法从三七茎叶总皂苷中分离鉴定三七皂苷-Fe,利用工业酶制剂β-葡聚糖苷酶对三七皂苷-Fe进行转化。树脂法、硅胶柱层析及薄层层析法分离、纯化酶转化产物;1HNMR和13C NMR光谱数据分析鉴定酶转化产物Ⅰ是20(S)原人参二醇-20-O-α-L-呋喃阿拉伯糖基(1→6)β-D-吡喃葡萄糖苷(人参皂苷-Mc);转化物Ⅱ是20(S)原人参二醇-20-O-β-D-吡喃葡萄糖苷(C-K)。结果酶解动力学的研究中,经过24h的反应,三七皂苷-Fe的转化率接近95%。结论β-葡聚糖苷酶转化三七皂苷-Fe的途径为三七皂苷-Fe→人参皂苷-Mc→C-K。     

一种体内溶栓活性优于总蚯蚓纤溶酶的组分

目的筛选高效低毒的蚯蚓纤溶酶单一组分。方法通过亲和色谱从赤子爱胜蚓获得含多组分的总蚯蚓纤溶酶(EFE)，经离子交换分离得到3个主要溶栓组分EfP-0-2，EfP-I-1和EfP-I-2，与EFE比较体内外溶栓效果和毒副作用。结果与其他组分比较，EfP-I-1的体外溶栓作用较强；当静脉注射4.5 mg·kg^-1时，各组分对纤维蛋白原的影响均不明显，只有EfP-I-1能显著溶解动静脉旁路血栓；当静脉注射达6 mg·kg^-1时，只有该组分对延长出血时间的影响不明显；急性毒性实验表明，该组分的LD₅₀是EFE的2.17倍。结论EfP-I-1有较高的体内外溶栓活性和较低的毒副作用。由于该组分在总EFE中所占比例较高，并易于分离纯化，故适于作为单一组分的溶栓药物进行开发。     

不同生化标记物在经皮冠状动脉介入后的对比分析

目的探讨心肌酶（GOT、LDH、CK、CK-MB）及心肌肌钙蛋白I（cTn-I）测定在急诊经皮冠状动脉介入治疗（PCI）后反映心肌获得再灌注的敏感性和可靠性。方法使用美国产杜邦全自动生化分析仪测定87例AMI心肌酶，以GOT〉40U／L，LDH〉245．0U／L，CK〉174．0U／L，CK-MB〉24．0U／L为阳性；采用日本产罗氏全自动化学发光仪测定心肌肌钙蛋白I，以cTn-I〉0．2ng／ml为阳性。结果在PCI后AMI患者心肌酶及（cTn-I）高峰期迅速提前，而且在短时间内恢复，其中以cTn-I最为敏感，是一种反映心肌损伤后修复的较佳特异性标志物。结论（cTn-I）其临床应用价值优于心肌酶。     

Synthesis of isotopomers of dopamine labeled with deuterium or tritium

The synthesis of four isotopomers of dopamine labeled with deuterium or tritium is reported. The ring labeled [2′,5′,6′‐²H₃]‐, and [2′,5′,6′‐³H₃]‐dopamine were obtained using acid catalyzed isotopic exchange between dopamine and heavy or tritiated water respectively. Two selectively labeled isotopomers, i.e. [1R‐²H]‐, and [1R‐³H]‐dopamine were synthesized by enzymatic decarboxylation of L ‐DOPA using the enzyme tyrosine decarboxylase (EC 4.1.1.25) from Streptococcus faecalis. Copyright © 2006 John Wiley & Sons, Ltd.     

福寿螺纤溶酶的分离纯化及其性质研究

目的:建立一种高效的福寿螺纤溶酶(ACFE)分离纯化技术,并研究其理化性质.方法:福寿螺经组织匀浆、缓冲液抽提与选择性热变性,再经大豆胰蛋白酶抑制剂耦联的Sepharose 4B亲和层析、DEAE-Sephacel离子交换层析与羟基磷灰石亲和层析.结果:分离纯化得到一种均一的ACFE成分,其分子量为32 kD,pI为3.6,最适pH在9.5～11.0之间,该酶热稳定性强,能抗4 mol/L脲处理;其具有水解合成底物S-2288和Chromozym P的活性,活性受Zn2 、Cu2 等抑制,受对氨基磺酸氟(PMSF)抑制,但不受对羟甲基苯磺酸(PHMB)影响.结论:首次从福寿螺体内分离纯化得到ACFE.