西洋参叶20s-原人参二醇组皂苷对小鼠心肌营养性血流量的影响

通过小鼠心肌^86Rb摄取率实验，观察西洋参叶20s-原人参二醇组皂苷(PQDS)对小鼠心肌营养性血流量的影响。结果表明，PQDS50、100mg／kg均可明显增加小鼠心肌^86Rb摄取率，25mg／kg亦有增加小鼠心肌^86Rb摄取率的趋势，提示PQDS能增加心肌营养性血流量。     

人参果皂苷对小鼠心肌营养性血流量的影响

通过小鼠心肌^86Rb摄取率实验，观察人参果皂苷(GFS)对小鼠心肌营养性血流量的影响。结果表明，GFS30、60mg／kg可明显增加小鼠心肌^86Rb摄取率，15mg／kg亦有增加小鼠心肌^86Rb摄取率的趋势，提示GFS能增加心肌营养性血流量。     

人参皂苷Rb3对小鼠心肌营养性血流量的影响

目的研究人参皂苷Rb3(G-Rb3)对小鼠心肌营养性血流量的影响,并与西洋参茎叶20S-原人参二醇皂苷(PQDS)进行比较。方法昆明种小鼠随机分为对照组,阳性药维拉帕米5mg/kg组,G-Rb310、20、40mg/kg组及PQDS 50mg/kg组,各组小鼠每日腹腔注射给药1次,连续3日,末次药后20分钟经尾静脉注射86Rb生理盐水溶液0.1ml/只,以每只动物心脏测得放射性计数占注入总放射性的百分数为摄取率,计算心肌摄取86Rb的增减率,求出小鼠心肌营养性血流量。结果 G-Rb320、40mg/kg及PQDS 50mg/kg组均可明显增加小鼠心肌86Rb摄取率,其作用效果与阳性药维拉帕米5mg/kg相当。结论 G-Rb3能明显增加小鼠心肌营养性血流量。     

复方刺五加注射液对小鼠心肌营养性血流量的影响

本文通过小鼠心肌跖Rb摄取率实验,观察复方刺五加注射液对小鼠心肌营养性血流量的影响。结果表明,复方刺五加注射液25、50、100mg／kg均可明显增加小鼠心肌^86Rb摄取率,提示其能明显增加心肌营养性血流量。     

剌五加茎叶皂甙对小鼠心肌营养性血流的影响

以小鼠心肌摄取~(86)Rb能力为指标,观察了刺五加茎叶皂甙ip25、50、100mg/kg对小鼠心肌营养性血流的影响。结果表明25、50、100mg/kg均可明显增加心肌营养性血流(P<0.05或P<0.01),但50mg/kg剂量已达最大效应。与人参和西洋参茎叶皂甙的作用比较,刺五加茎叶皂甙的作用较强。     

人参Rb组皂苷对小鼠心肌营养性血流的影响

以小鼠心肌摄取＾８６Ｒｂ能力为指标,观察了人参Ｒｂ组皂苷对小鼠心肌营养性血流的影响。结果表明,人参Ｒｂ组皂苷２５．５０、１００ｍｇ／ｋｇ均可明显增加心肌营养性血流（Ｐ〈０．０５～０．００１）,其作用强度优于西洋参茎叶总皂苷。     

人参皂苷Rb3及Rb2组合物对大鼠实验性心肌梗死的保护作用

目的研究人参皂苷Rb,及Rb,组合物对大鼠急性心肌梗死的保护作用。方法采用大鼠结扎左冠状动脉前降支制备急性心肌梗死模型,计算急性心肌梗死24h后的心肌梗死面积（MIS）,测定血清肌酸磷酸激酶（CK）、乳酸脱氢酶（LDH）、天门冬氨酸氨基转换酶（AST）、超氧物歧化酶（SOD）及谷胱甘肽过氧化物酶（GSH—Px）活力,丙二醛（MAD）及一氧化氮（NO）含量。结果人参皂苷Rb,及Rb：组合物5、10、20mg／kg均可明显缩小急性心肌梗死大鼠的MIS,降低血清CK、LDH、AST活性及MAD含量,提高血清SOD、GSH—Px活性及NO含量。结论人参皂苷Rb,及Rb：组合物对大鼠急性心肌梗死具有明显保护作用,可能与其增强抗氧化酶活性,减少氧自由基对心肌的损伤等机制有关。     

碟脉灵注射液对小鼠心肌营养性血流的影响

以小鼠心肌摄取＾８６Ｒｂ能力为指标,观察碟脉灵注射液对小鼠心肌营养性血流的影响。结果表明,腹腔注射碟脉灵注射液１、２、４ｇ／ｋｇ均可明显增加心肌营养性血流（Ｐ〈０．０５,Ｐ〈０．０１或Ｐ〈０．００１）,其作用强度优于等剂量下的复方丹参注射液。     

人参皂苷Rb3对实验性心肌缺血的保护作用

目的研究人参皂苷Rb3(G-Rb3)对实验性心肌缺血的保护作用,并与西洋参茎叶20S-原人参二醇皂苷(PQDS)进行比较。方法昆明种小鼠皮下注射异丙肾上腺素后放入盛有钠石灰的250ml广口瓶内,加盖密封后记录小鼠存活时间;Wistar大鼠舌下静脉注射垂体后叶素后观察心电图变化程度。结果 G-Rb320、40mg/kg及PQDS 50mg/kg对皮下注射异丙肾上腺素缩短小鼠在常压缺氧状态下的存活时间均具有明显对抗作用;G-Rb3 14、28mg/kg及PQDS 35mg/kg均可明显减轻垂体后叶素诱发的大鼠急性心肌缺血心电图(ST段抬高及T波高耸)变化程度。结论 G-Rb3对实验性心肌缺血具有明显保护作用,其作用强度与维拉帕米相当。     

人参Rb组皂甙对实验性心肌缺血的影响

本文报告了人参Rb组皂甙的抗实验性心肌缺血作用,并与人参茎叶总皂甙进行了对比。结果表明,人参Rb组皂甙按50、100mg/kg每天灌胃给药1次,连续5天,能明显延长小鼠常压缺氧状态下的存活时间,增强皮下注射异丙肾上腺素小鼠的耐缺氧能力,亦能明显改善舌下静脉注射脑垂体后叶素所致大鼠急性心肌缺血性心电图改变。提示人参Rb组皂甙对实验性心肌缺血有一定保护作用,共作用效果优于等剂量的人参茎叶总皂甙。     

油用向日葵需钾量的试验

利用~(86)Rb作示踪剂进行盆栽,结合大田的小区试验,对向日葵合理施钾量的研究表明;在N、P肥为基础正常施量情况下,以每亩7.5—15公斤施钾量最佳,既能促进前期的生长发育,又能增加百粒重,提高产量。经方差分析达1％极显著水平。     

The effect of intermittent hypoxia on bodyweight, serum glucose and cholesterol in obesity mice

This article tests mice's indicators of body nutritional metabolism under tolerable hypoxic conditions, in order to explore the effects of moderate intermittent hypoxia on the bodyweight, blood sugar and blood cholesterol of obese mice and to identify the role of leptin in these effects; this study applies high-fat diet to establish Mice Obesity Models and observes the intervention effects of intermittent hypoxic training in this Model. Small healthy mice are classified in 4 groups at random, that is, Group A (Normal), Group B (Normal Hypoxia) fed with normal foods and undergoing Intermittent Hypoxic Training (IHT), Group C (Fatty-diet) fed with High-Fat and High-Sugar (HFHS) foods without IHT and Group D (Fatty-diet and Hypoxia) fed with HFHS foods with IHT. After 40 days of feeding and hypoxic training, weigh the mice, measure the levels of blood sugar and blood cholesterol with a full automatic biochemical analyzer, measure serum leptin concentration by enzyme-linked immunosorbent assay (ELISA) technique, inspect liver leptin receptor expression and liver fat slice by immunohistochemistry. It is found that compared to control group, after experiment, the average bodyweight, blood sugar, blood cholesterol and serum leptin concentration in Group C is increased significantly and numerous fat cells are distributed in the liver, which indicates that hyperlipemia model has been successfully established; after intermittent hypoxic training, the average bodyweight, blood sugar, blood cholesterol and liver fat cells distribution density and scope in Group B and D are lower than those in Group A and C, while serum leptin concentration is increased significantly; liver leptin receptor expression in Group D is higher than that in Group C. And hypoxia groups have no trauma conclusion. Moderate intermittent hypoxia can reduce bodyweight by increasing leptin concentration and enhancing liver leptin expression and it can also reduce the level of blood sugar and blood cholesterol and meanwhile prevent steatosis in liver cells effectively.     

乙烯利-缩节安复配剂对夏玉米根系伤流液的影响

研究结果表明:夏玉米根系伤流量在吐丝期前后达到高峰,其后随着植株的衰老成熟不断下降,伤流液中各种营养元素和内源激素流量基本与伤流量的变化趋势一致。在大喇叭口期叶面喷施乙烯利-缩节安复配剂后,根系伤流量有所减少,但差异不明显;在吐丝期或子粒形成初期前,复配剂处理的大量和微量元素流量要略高于对照,其后则明显低于对照;内源激素流量在吐丝期前高于对照,其后则略低于对照。上述结果表明,乙烯利-缩节安复配剂具有调控根系伤流量、营养元素和内源激素流量的作用。     

全反射X-射线荧光法分析茶叶中的矿质元素

用全反射X -射线荧光法 (TXRF)分析了江西婺绿和宁红茶的矿质元素含量。结果表明 ,所测茶叶中P、S、K、Ca的含量在 2 4 70～ 30 70 0 μg/g ;Mn、Fe在 2 0 6～ 10 70 μg/g ;Ti、Ni、Cu、Zn、Rb、Sr、Ba在 5 5～ 12 2 μg/g ;Pb含量均小于 4 0 μg/g (干基 )。宁红还表现出 ,品质越好 ,P、Ni、Zn含量越高 ,而K、Ca、Mn、Sr、Ba含量则相反。茶汤中K、Rb、Ni的浸出率为 30 5%～ 86 4% ;P、S、Mn、Cu、Zn、Sr为 11 6 %～ 4 2 4% ;Ca为 7 2 %～ 12 6 % ;Fe为 1 1% -2 6 %。茶汤中Ti、Ba、Pb的含量均低于TXRF法的检测限。宁红茶汤还表现出 ,品质越好 ,K、Ca、Mn、Zn、Rb、Sr的浸出率越高。但红茶汤中的K、Zn、Rb、Ni浸出率明显低于绿茶     

茶多酚生物学活性的研究

用 ESR 法、化学发光法和分光光度法3种实验模型测定,证明茶多酚消除活性氧自由基的效率达92%—98%,明显优于维生素 C 和维生素 E。动物实验结果表明,口喂或腹腔注射给药,茶多酚能提高小白鼠的全血 GSH-Px 活力(P<0.01)和肝中 SOD 的活力(P<0.05),降低肝和血清中 LPO 的含量(P<0.01),延缓心肌 LF 的形成(P<0.01)。大白鼠在~(60)Co-γ射线照射前后口喂茶多酚,其全血中的 GSH-Px、SOD 均有提高(P<0.01),血浆和肝脏中的 LPO 含量和心肌中 LF的含量接近或优于阳性(牛磺酸)对照组。用~3H-TdR 掺入法测定茶多酚对 SR-Ⅰ癌细胞 DNA 合成的抑制率,结果达98%。荷瘤小鼠口喂茶多酚后,能明显抑制 S180或 EAC 肿瘤的增长,并能增加荷瘤小鼠的胸腺重量和胸腺细胞数,3个剂量的茶多酚胸腺指数比对照组分别提高58.5%、43.9%和34.0%。上述结果表明:茶多酚具有抗衰老、抗辐射、抗氧化、消除自由基、防治肿瘤及增加机体免疫力等多种生物学功能。     

Anti-Diabetic Effects of CTB-APSL Fusion Protein in Type 2 Diabetic Mice

To determine whether cholera toxin B subunit and active peptide from shark liver (CTB-APSL) fusion protein plays a role in treatment of type 2 diabetic mice, the CTB-APSL gene was cloned and expressed in silkworm (Bombyx mori) baculovirus expression vector system (BEVS), then the fusion protein was orally administrated at a dose of 100 mg/kg for five weeks in diabetic mice. The results demonstrated that the oral administration of CTB-APSL fusion protein can effectively reduce the levels of both fasting blood glucose (FBG) and glycosylated hemoglobin (GHb), promote insulin secretion and improve insulin resistance, significantly improve lipid metabolism, reduce triglycerides (TG), total cholesterol (TC) and low density lipoprotein (LDL) levels and increase high density lipoprotein (HDL) levels, as well as effectively improve the inflammatory response of type 2 diabetic mice through the reduction of the levels of inflammatory cytokines tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6). Histopathology shows that the fusion protein can significantly repair damaged pancreatic tissue in type 2 diabetic mice, significantly improve hepatic steatosis and hepatic cell cloudy swelling, reduce the content of lipid droplets in type 2 diabetic mice, effectively inhibit renal interstitial inflammatory cells invasion and improve renal tubular epithelial cell nucleus pyknosis, thus providing an experimental basis for the development of a new type of oral therapy for type 2 diabetes.