中剂量螺旋藻多糖和银杏提取物的联合抗衰老作用研究

[目的]研究中剂量螺旋藻多糖和银杏提取物的联合抗衰老作用.[方法]每天对试验小鼠颈下注射D-半乳糖125 mg/kg,连续42d,建立衰老模型.给药组小鼠每天灌服100 mg/kg螺旋藻多糖、银杏叶及复合药液,观察中剂量复合螺旋藻多糖和银杏叶有效成分对D-半乳糖致衰老小鼠的作用,并测定免疫器官重量、血清SOD活性和心肌、脑丙二醛(MDA)含量等相关衰老指标.[结果]螺旋藻多糖和银杏提取物均能有效对抗D-半乳糖所致小鼠衰老,二者的复合药效要强于单一药效.[结论]该研究为螺旋藻多糖和银杏提取物的联合抗衰老作用提供了试验依据.     

人参三七提取物抗疲劳作用的研究

[目的]研究人参三七提取物缓解体力疲劳的作用,为进一步开发利用人参三七提供试验依据.[方法]将小鼠分为4批,每批48只,随机分为4组,分别为对照组和50、100、300 mg/kg 3个给药组,各组小鼠经口灌胃给药30 d后,分别测定其负重游泳时间及血清尿素氮、血乳酸、肝糖原含量.[结果]100和300 mg/kg 剂量组人参三七提取物小鼠负重游泳时间显著长于对照组(P<0.01),血清中尿素氮含量显著低于对照组(P<0.01;P<0.05),小鼠肝糖原水平明显高于对照组(P<0.01;P<0.05);小鼠游泳后血乳酸含量显著低于对照组(P<0.01;P<0.05).[结论]人参三七提取物具有缓解体力疲劳的作用.     

长白山地区不同海拔人参挥发油含量及其成分变化规律

[目的]分析海拔高度对长白山地区人参挥发油含量及其成分变化的影响及规律.[方法]采用水蒸汽蒸馏法提取人参中的挥发油,用归一化法测定各组分的体积分数,并采取气质联用(GC-MS)对挥发油中单体成分进行鉴定及含量测定.[结果]生长于不同海拔的4年生人参中挥发油的含量及其成分有显著差别.[结论]海拔高度对于人参挥发油的含量及其成分均有一定的影响,人参挥发油的含量随海拔的升高而增加.     

低聚木糖对雏鸡生长性能·免疫功能及营养物质利用率的影响

[目的]探讨低聚木糖对雏鸡生长性能、免疫功能及营养物质利用率的影响,以确定较为合理的雏鸡添加量.[方法]以1日龄海兰褐蛋用雏鸡为试验对象,喂养添加不同水平(0.01%、0.02%和0.03%)的低聚木糖后测定其生长性能、免疫功能及营养物质利用率等各项指标.[结果]日粮中添加低聚木糖能够提高雏鸡的生长性能、免疫机能和营养物质利用率.[结论]日粮中添加0.02%低聚木糖的促进生长效最好.     

野生蒲公英联合高山红景天对糖尿病模型小鼠的降血糖作用研究

[目的]探讨长白山野生蒲公英(Taraxacum mongolicum)联合高山红景天(Rhodiola sachalinensis)对糖尿病小鼠的降血糖影响.[方法]选取30只昆明种小鼠,其中24只造成糖尿病模型,分为5组,分别为正常对照组、四氧嘧啶模型组、高山红景天组、长白山野生蒲公英组和联合剂量组.采用自制的水煎液进行灌胃给药,1次/d,连续5 d,测定糖尿病模型小鼠的血糖值.[结果]给药5 d后,各试验组小鼠血糖浓度均明显降低,与四氧嘧啶模型组相比存在极显著差异(P<0.01).[结论]高山红景天、长白山野生蒲公英、高山红景天与蒲公英联合对糖尿病小鼠都有明显的降血糖作用.     

高剂量复合螺旋藻多糖抗衰老作用研究

[目的]探讨高剂量复合螺旋藻多糖的抗衰老作用,为螺旋藻和银杏叶资源的进一步开发和利用奠定基础.[方法]小鼠每天分别灌服复合药物,同时各鼠每天颈背皮下注射D-半乳糖,连续造模42 d后,观察高剂量复合螺旋藻多糖、银杏叶提取物对D-半乳糖致衰老小鼠的作用,测定免疫器官重量、血清SOD活性和心肌、脑丙二醛(MDA)含量等相关衰老指标.[结果]复合螺旋藻多糖能显著对抗连续42 d给D-半乳糖125 mg/kg·d所致小鼠衰老.[结论]复合螺旋藻多糖具有明显的抗氧化抗衰老作用,可能与多羟基结构有关.     

紫茎泽兰不同组织水提取液对水稻·玉米化感作用机制

[目的]研究紫茎泽兰不同组织根、茎、叶水浸提取液对2种农作物玉米、水稻化感作用及对受试农作物生理指标的影响,以探讨化感物质作用机制.[方法]采用培养皿滤纸法测定不同浓度根、茎、叶水浸提液对受试种子萌发率和幼苗生长影响,并检测受试农作物生理指标丙二醛(MDA)含量、过氧化物酶(POD)活力的变化.[结果]紫茎泽兰根、茎、叶水浸提液对受试玉米、水稻的发芽率和幼苗根长、株高均有不同程度的影响,使受试农作物幼苗体内丙二醛(MDA)含量增加、过氧化物酶(POD)活性呈现先增加后降低趋势.[结论]紫茎泽兰不同组织水提液对受体植物的种子萌发、幼苗生长过程均具有明显的抑制作用,其茎的化感敏感效应大于根、叶,水提液抑制受试农作物光合效率,提高了幼苗体内的MDA含量,并降低了POD酶活性.     

黄柏及其炮制品的抗痛风作用研究

[目的]研究对黄柏及其不同炮制品的抗痛风作用.[方法]以黄柏及其不同炮制品的提取物灌胃,观察提取物对大鼠的血清尿酸、肌酐浓度及关节肿胀指数的影响.[结果]与阳性对照组相比,黄柏及其不同炮制品均能明显降低高尿酸血症模型大鼠的尿酸和肌酐水平,抑制急性痛风关节炎模型大鼠的关节肿胀.[结论]黄柏在炮制前后均有不同程度的抗痛风作用,不同炮制方法对该作用影响不明显.     

低聚木糖对蛋用雏鸡免疫功能及肠道菌群的影响

[目的]探讨低聚木糖时蛋用雏鸡免疫功能和肠道菌群的影响,以找出较为合理的雏鸡添加量.[方法]以1日龄海兰褐壳蛋用雏鸡为试验对象,在基础日粮中分别添加0.010%、0.015%、0.020%低聚木糖,测定其免疫功能和肠道菌群.[结果]日粮中添加低聚木糖能够提高雏鸡免疫功能,增加雏鸡盲肠内双歧杆菌数量,降低大肠杆菌和沙门氏菌数量.[结论]日粮中添加0.020%低聚木糖的效果最好.     

核桃楸树皮乙酸乙酯提取物对原位移植荷胃癌小鼠的抑瘤作用

目的:研究核桃楸树皮乙酸乙酯提取物(HYT)对原位移植荷胃癌小鼠的抑瘤作用及其对免疫功能的影响,阐明HYT抗胃癌作用机理,为研发低毒高效的抗胃癌中草药提供理论依据.方法:建立HYT灌胃的原位移植荷胃癌小鼠研究模型,分为HYF高剂量组(60 mg·kg-1)、HYF低剂量组(40 mg·kg-1)、假手术组、阳性对照组(5-FU)及阴性对照组,观察每组小鼠抑瘤率及胸腺、脾脏指数,采用ELISA法及流式细胞术等检测荷胃癌小鼠IL-4 、IL-12、TNF-α水平及T淋巴细胞亚群情况.结果:HYT高剂量组抑瘤率与阳性对照组比较差异无统计学意义(P>0.05);与阴性对照组比较,HYT高剂量组小鼠胸腺指数及脾脏指数明显增加(P<0.05),IL-12水平升高(P<0.05),IL-4水平降低(P<0.05),TNF-α水平升高(P<0.05),T淋巴细胞亚群CD4+/CD8+比值升高(P<0.05).结论:HYT可以增强机体免疫功能,具有明确的抑瘤作用,可以作为抗胃癌低毒高效的中草药.     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.