Objective:To achieve a primary pharmacological screening contained in the aqueous extract of Berberis vulgaris(B.vulgaris) and to examine the hypoglycaemic effect and biochemical parameters of aqueous and saponins ext...Objective:To achieve a primary pharmacological screening contained in the aqueous extract of Berberis vulgaris(B.vulgaris) and to examine the hypoglycaemic effect and biochemical parameters of aqueous and saponins extract on groups of rats rendered diabetic by injection of streptozotocin.Methods:The phytochemicol tests to detect the presence of different compounds were based on the visual observation of color change or formation of precipitate after the addition of specific reagents.Diabetes was induced in rats by intraperitoneal(i.p.) injection of streptozotocin(STZ) at a dose of 65 mg/kg bw.The fasting blood glucose levels were estimated by glucose oxidase-peroxidase reactive strips(Dextrostix,Bayer Diagnostics).Blood samples were taken by cutting the tip of the tail.Serum cholesterol and serum triglycerides were estimated by enzymatic DHBS colorimetric method.Results:Administration of 62.5 and 2S.0 mg/kg of saponins and aqueous extract respectively in normal rats group shows a significant hypoglycemic activity(32.33%and 40.17%respectively) during the first week.However,diabetic group treated with saponin extract produced a maximum fall of 73.1%and 76.03%at day 1 and day 21 compared to the diabetics control.Also,blood glucose levels of the diabetic rats treated with aqueous extract showed decrease of 78.79%on the first day and the effect remains roughly constant during 3 week. Both extracts also declined significantly biochemical parameters(20.77%-49.00%).The control in the loss of body weight was observed in treated diabetic rats as compared to diabetic controls. Conclusions:These results demonstrated significant antidiabetic effects and showed that serum cholesterol and serum triglycerides levels were decreased,significantly,consequently this plant might be of value in diabetes treatment.展开更多
A surface-enhanced Raman scattering（SERS） optical fiber sensor was prepared by the laser-induced deposition ofAg nanoparticle membrane on a silica optical fiber tip, which was applied to the real time SERS spectral ...A surface-enhanced Raman scattering（SERS） optical fiber sensor was prepared by the laser-induced deposition ofAg nanoparticle membrane on a silica optical fiber tip, which was applied to the real time SERS spectral monitoring on the biorecognition of biotin/avidin. The bioidentification of biotin/avidin was carried out through a indirect method, in which the bioidentification is based on the SERS response signal of a labeled dye（Atto610） after its fluorescence has been quenched totally by the deposited Ag nanoparticle membrane. By SERS monitoring the bioidentification process of biotin/avidin, it has been found that this recognition process is finished in 40 min. The lowest detection concentration of biotin is 1.0 × 10^-7 mg/mL. This research is promising in the application of immunoassays on line and in vivo.展开更多
目的探讨亚甲蓝光化学法(MB-P)灭活处理新鲜血浆后对1年保存期内部分凝血因子活性的影响。方法随机抽取30(人)份全血(400 ml/份),按照标准操作规程将每份制备成新鲜血浆和病毒灭活新鲜血浆(100ml/份),分成未灭活组和灭活组,分别检测保...目的探讨亚甲蓝光化学法(MB-P)灭活处理新鲜血浆后对1年保存期内部分凝血因子活性的影响。方法随机抽取30(人)份全血(400 ml/份),按照标准操作规程将每份制备成新鲜血浆和病毒灭活新鲜血浆(100ml/份),分成未灭活组和灭活组,分别检测保存0(制备期<1个月检测)、6、8、10、12个月后的2组各自的FⅡ∶C、FⅤ∶C、FⅦ∶C、FⅧ∶C、FⅨ∶C、FⅩ∶C及Fg含量变化。结果与未灭活组相比,灭活组除FⅦ∶C含量无明显变化外,其他6种凝血因子含量在保存期内均明显下降(尤其FⅧ∶C和Fg下降最为明显);0、6、8、10、12个月保存时间的FⅧ∶C含量(%)分别为灭活前58.7±20.1、59.6±34.0、52.0±35.3、57.5±34.7、54.1±31.2和灭活后45.8±13.9、49.3±23.5、44.6±21.7、49.7±22.9、43.9±20.7(均为P<0.05),Fg含量(mg/dl)分别为灭活前225.3±72.3、277.9±64.2、272.3±74.9、262.6±70.8、287.55±83.0)和灭活后188.8±54.7、205.8±54.0、205.8±54.0、220.2±66.7、202.2±56.8(均为P<0.05)。保存0和12个月相比,FⅩ∶C含量(%)分别为93.0±30.5 vs 83.1±18.0(P<0.05)。结论新鲜血浆经MB-P病毒灭活处理后,1年冰冻保存期内起7种凝血因子含量相对稳定;MB-P对凝血因子活性造成了一定损伤(尤其是Fg和FⅧ∶C),但除FⅧ∶C外,其他凝血因子含量在可接受的范围内。展开更多
文摘Objective:To achieve a primary pharmacological screening contained in the aqueous extract of Berberis vulgaris(B.vulgaris) and to examine the hypoglycaemic effect and biochemical parameters of aqueous and saponins extract on groups of rats rendered diabetic by injection of streptozotocin.Methods:The phytochemicol tests to detect the presence of different compounds were based on the visual observation of color change or formation of precipitate after the addition of specific reagents.Diabetes was induced in rats by intraperitoneal(i.p.) injection of streptozotocin(STZ) at a dose of 65 mg/kg bw.The fasting blood glucose levels were estimated by glucose oxidase-peroxidase reactive strips(Dextrostix,Bayer Diagnostics).Blood samples were taken by cutting the tip of the tail.Serum cholesterol and serum triglycerides were estimated by enzymatic DHBS colorimetric method.Results:Administration of 62.5 and 2S.0 mg/kg of saponins and aqueous extract respectively in normal rats group shows a significant hypoglycemic activity(32.33%and 40.17%respectively) during the first week.However,diabetic group treated with saponin extract produced a maximum fall of 73.1%and 76.03%at day 1 and day 21 compared to the diabetics control.Also,blood glucose levels of the diabetic rats treated with aqueous extract showed decrease of 78.79%on the first day and the effect remains roughly constant during 3 week. Both extracts also declined significantly biochemical parameters(20.77%-49.00%).The control in the loss of body weight was observed in treated diabetic rats as compared to diabetic controls. Conclusions:These results demonstrated significant antidiabetic effects and showed that serum cholesterol and serum triglycerides levels were decreased,significantly,consequently this plant might be of value in diabetes treatment.
基金Supported by the National Natural Science Foundation of China（Nos.91027010, 21073073, 20903043, 20973075）, the Research Fund for the Doctoral Program of Higher Education of China（No.20090061120089） and the National Instrumentation Program（NIP） of the Ministry of Science and Technology of China（No.2011YQ03012408）.
文摘A surface-enhanced Raman scattering（SERS） optical fiber sensor was prepared by the laser-induced deposition ofAg nanoparticle membrane on a silica optical fiber tip, which was applied to the real time SERS spectral monitoring on the biorecognition of biotin/avidin. The bioidentification of biotin/avidin was carried out through a indirect method, in which the bioidentification is based on the SERS response signal of a labeled dye（Atto610） after its fluorescence has been quenched totally by the deposited Ag nanoparticle membrane. By SERS monitoring the bioidentification process of biotin/avidin, it has been found that this recognition process is finished in 40 min. The lowest detection concentration of biotin is 1.0 × 10^-7 mg/mL. This research is promising in the application of immunoassays on line and in vivo.
文摘目的探讨亚甲蓝光化学法(MB-P)灭活处理新鲜血浆后对1年保存期内部分凝血因子活性的影响。方法随机抽取30(人)份全血(400 ml/份),按照标准操作规程将每份制备成新鲜血浆和病毒灭活新鲜血浆(100ml/份),分成未灭活组和灭活组,分别检测保存0(制备期<1个月检测)、6、8、10、12个月后的2组各自的FⅡ∶C、FⅤ∶C、FⅦ∶C、FⅧ∶C、FⅨ∶C、FⅩ∶C及Fg含量变化。结果与未灭活组相比,灭活组除FⅦ∶C含量无明显变化外,其他6种凝血因子含量在保存期内均明显下降(尤其FⅧ∶C和Fg下降最为明显);0、6、8、10、12个月保存时间的FⅧ∶C含量(%)分别为灭活前58.7±20.1、59.6±34.0、52.0±35.3、57.5±34.7、54.1±31.2和灭活后45.8±13.9、49.3±23.5、44.6±21.7、49.7±22.9、43.9±20.7(均为P<0.05),Fg含量(mg/dl)分别为灭活前225.3±72.3、277.9±64.2、272.3±74.9、262.6±70.8、287.55±83.0)和灭活后188.8±54.7、205.8±54.0、205.8±54.0、220.2±66.7、202.2±56.8(均为P<0.05)。保存0和12个月相比,FⅩ∶C含量(%)分别为93.0±30.5 vs 83.1±18.0(P<0.05)。结论新鲜血浆经MB-P病毒灭活处理后,1年冰冻保存期内起7种凝血因子含量相对稳定;MB-P对凝血因子活性造成了一定损伤(尤其是Fg和FⅧ∶C),但除FⅧ∶C外,其他凝血因子含量在可接受的范围内。
