蚯蚓冻干粉对高血脂症小鼠的降血脂作用

为了探讨蚯蚓冻干粉对高血脂症小鼠的降血脂作用,取体重为18～22 g的昆明种小鼠,随机分为5组,空白对照组饲喂基础饲料,高脂饲料组饲喂高脂饲料,其余3组在饲喂高脂饲料的同时分别按0.4,0.2, 0.1 g/kg体重灌胃蚯蚓冻干粉悬液,8周后禁食12 h,尾部取血,测定血清总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)及低密度脂蛋白胆固醇(LDL-C).结果表明,饲喂不同剂量蚯蚓冻干粉可明显降低高血脂症小鼠TC(P < 0.05)和TG,LDL-C(P < 0.05),并使HDL-C(P < 0.05)显著上升.     

高脂血症食蟹猴模型的建立及分析

目的 建立高脂血症食蟹猴模型。方法 采用高脂膳食饲料诱导食蟹猴,分别在4、8、12、18个月检测血清总胆固醇(TC)、高密度脂蛋白(HDL)、低密度脂蛋白(LDL)、甘油三脂(TG)指标,对其血脂指标的变化趋势进行分析。结果 模型组在饲喂高脂膳食饲料4个月后,TC、HDL、LDL与实验前相比差异极显著(P<0.01);TG在饲喂高脂膳食饲料8个月后明显升高,与实验前相比差异极显著(P<0.01);造模后,高脂饲料组与正常对照组比较,TC、HDL、LDL、TG均高于对照组,差异极显著(P<0.01)。结论 在本实验中,模型组TC、HDL、LDL、TG均呈现递增趋势,尤其是TC、LDL明显高于食蟹猴正常参考值水平,说明模型组食蟹猴具有高胆固醇和高、低密度脂蛋白血症的特征,初步建立了食蟹猴高脂血症动物模型。     

小鼠高脂血症性脂肪肝的动态研究

目的:建立小鼠高脂血症及脂肪肝模型,观察高脂血症性脂肪肝程度和时间的动态关系.方法:采用昆明种小鼠60只,随机分为对照组(n1=30),高脂组(n2=30),对照组喂普通饲料,高脂组喂高脂饲料,分别检测2～4周小鼠血清TG、TC、HDL-C、LDL-C、和肝组织TG、TC含量变化;并观察肝指数,根据肝脏病理切片HE染色和冰冻切片苏丹Ⅲ染色分析肝脏脂变情况.结果:在喂高脂饲料2周后,小鼠血清TC、HDL-C、LDL-C、TC/HDL-c出现明显升高,肝脏TG、TC含量也显著高于对照组,随后的3～4周血脂及肝脂水平保持稳定上升;肝指数持续增大,有肝细胞脂肪变性,肝脏组织细胞脂变程度随喂高脂饲料时间的延长逐渐加重.结论:高脂饲料喂养的小鼠4周内可形成不同脂变程度的脂肪肝,为抗脂肪肝药物的研究提供了实验依据.     

茶多酚复方制剂降血脂实验研究

目的:探讨茶多酚复方制剂对高血脂症大鼠的血脂调节作用。方法:将120只雄性SD大鼠随机分为正常组、高脂模型组和治疗组3组,正常组基础饲料饲喂生理灌喂,高脂模型组高脂饲料饲喂生理盐水灌喂,治疗组高脂饲料饲饲喂茶多酚复方制剂灌喂。实验持续8周,每2周每组随机宰杀10只,测定血液TC、TG、HDL-C、LDL-C含量。结果:整个实验期,治疗组大鼠血液TC、TG、LDL-C含量显著低于高脂模型组(P<0.05),而血液HDL-C含量显著高于高脂模型组(P<0.05)。结论:茶多酚复方制剂具有降血脂作用。     

两种乳杆菌对高脂小鼠降血脂作用的研究

高血脂与心血管疾病密切相关,研究发现补充具有胆盐水解酶活力的益生菌可以有效改善脂质代谢,因此对实验室现有的水解胆盐能力较强的植物乳杆菌AR113和水解胆盐能力较差的干酪乳杆菌LC2W进行体内降血脂试验,探讨其对高脂饮食小鼠血脂的影响。以ICR小鼠为实验动物,随机分成4组:对照组、高脂模型组、高脂模型+菌株AR113组、高脂模型+菌株LC2W组。4周造模成功后开始连续灌胃菌液4周,研究其对小鼠体重、脏器指数、血清总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)、肝脏TC和甘油三酯(TG)的影响。结果显示菌株AR113比LC2W降低血清血脂和肝脏血脂效果更好,菌株AR113对高脂血症小鼠具有显著的降胆固醇作用。     

野生山葡多酚对高脂血症小鼠脂代谢的影响及抗氧化作用研究

目的研究野生山葡多酚对脂代谢的影响及抗脂质过氧化作用.方法观察不同浓度野生山葡多酚对高脂血症小鼠血清总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)及脂质过氧化(LPO)水平的影响.结果野生山葡多酚200 mg/(kg·d-1)×56 d组小鼠血清TG,TC,LPO含量明显低于高脂饲料组(P＜0.05,P＜0.01,P＜0.01),而野生山葡多酚100 mg/(kg·d-1)×56 d组小鼠血清HDL-C含量显著高于高脂饲料组(P＜0.01),动脉硬化指标(AI)显著低于高脂饲料组(P＜0.01).结论野生山葡多酚具有显著降低血脂含量和抗脂质过氧化作用.提示野生山葡多酚具有防治动脉硬化作用.     

红枣汁对小鼠血脂水平影响的研究

采用不同浓度红枣汁对小鼠进行试验,研究其对小鼠血脂水平的影响.结果表明,红枣汁组小鼠的血清甘油三酯(TG)、总胆固醇(TC)和动脉硬化指数(AI)均显著(P<0.05或P<0.01)低于高脂模型组,而高密度脂蛋白(HDL C)极显著(P<0.001)高于高脂模型组,提示红枣汁具有显著(P<0.05)的降血脂保健作用.     

果糖饮水对Ⅱ型糖尿病ICR小鼠体重和血糖的影响

目的观察果糖饮水对高脂饲料-STZ诱导ICR小鼠Ⅱ型糖尿病模型过程中体重及血糖浓度变化的影响。方法选取ICR小鼠(3周龄)雌雄各半,先以高脂饲料及高脂饲料加3%果糖饮水喂养6周,再以链脲佐菌素(STZ)(100 mg/kg体重)腹腔注射,继续喂养6周。每周测定体重,于注射前及注射后4周测定非空腹血糖浓度。结果雄性高脂饲料-果糖饮水组和高脂饲料组体重显著高于对照组(P<0.05),而高脂饲料-果糖饮水组与高脂饲料喂养组间没有显著差异(P>0.05);雌性高脂饲料-果糖饮水组和高脂饲料组体重与对照组均无显著差异(P>0.05),但高脂饲料-果糖饮水组体重显著低于高脂饲料组(P<0.05)。喂养6周后(注射STZ前),高脂饲料-果糖饮水组和高脂饲料组的血糖浓度均显著高于对照组(P<0.05),而实验组间没有显著差异。注射STZ后,雄性高脂饲料-果糖饮水组和高脂饲料组的血糖浓度均显著高于对照组(P<0.01),并且都超过糖尿病小鼠非空腹血糖的成模标准(11 mmol/L),且高脂饲料-果糖饮水组血糖浓度又显著高于高脂饲料喂养组(P<0.05);雌性小鼠高脂饲料-果糖饮水组和高脂饲料组血糖浓度均显著高于对照组(P<0.01),但都没有达到糖尿病小鼠非空腹血糖的成模标准,且高脂饲料-果糖饮水组与高脂饲料组间血糖浓度没有显著差异(P>0.05)。结论在高脂饲料喂养联合腹腔注射STZ制备Ⅱ型糖尿病模型实验中,果糖饮水对高脂饲料致肥胖作用没有显著的改善,而对血糖浓度升高具有明显的促进作用。这种促进作用在雄性小鼠最为明显,而对雌性小鼠没有明显效果。     

马齿苋水提物对高脂血症小鼠血脂的影响

目的 探讨马齿苋水提物降低高脂血症小鼠血脂的作用.方法 通过高脂肪饮食建立高脂血症小鼠模型，将小鼠随机分为正常对照组、高脂模型组、洛伐他汀组、马齿苋低剂量组、马齿苋高剂量组.喂养正常对照组时使用一般饲料，其他实验组使用高脂肪饲料，并且在饲喂同时按照其相应体质量进行灌胃给药.7周后，检测实验动物血清中总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL)、高密度脂蛋白胆固醇(HDL)、超氧化物歧化酶(SOD)、丙二醛(MDA)、谷丙转氨酶(ALT)、谷草转氨酶(AST)含量.结果 马齿苋水提物能显著降低高脂血症模型小鼠血清中TC、TG、LDL-C、MDA、ALT和AST水平(P<0.01),显著提高HDL和SOD水平(P<0.01).结论 马齿苋水提物能显著降低高脂血症小鼠血清中血脂的水平，并能在一定程度上减轻喂食高脂饲料对实验动物的不利影响.     

斑蝥黄质对大鼠高血脂症形成过程中脂代谢的干预作用

研究了斑蝥黄质对高脂饲料喂养下大鼠诱发高血脂症过程中干预血脂代谢的情况.将60只SD雄性大鼠随机分为正常对照组、高血脂模型组、辛伐他汀阳性药组(15mg/kg)、斑蝥黄质高刺量组(20mg/kg).斑蝥黄质中剂量组(15 mg/kg)、斑蝥黄质低剂量组(10 mg/kg),分别饲喂标准、高脂、高脂+辛伐他汀、高脂+不同剂量斑蝥黄质,于实验开始前1天和开始后第4,8,12周末取空腹血,检测血清甘油三酯(TG)、总胆固醇(TC)和高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C).与高血脂模型组比较,斑蝥黄质组的TC,TG,LDL-C在第8,12周时降低(P<0.01),而HDL-C升高(P<0.01).研究表明斑蝥黄质可以对高脂饲料喂养大鼠诱发高血脂症过程中血脂代谢产生影响,改善血脂变化.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that