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31.
钒对大白鼠脾脏生长发育的影响 总被引:2,自引:0,他引:2
150只SD大白鼠随机分成5组,雌雄各半,对照组饮饲蒸馏水,试验Ⅰ、Ⅱ、Ⅲ、Ⅳ组分别添加钒10mg/kg、20 mg/kg、40 mg/kg、60mg/kg,于饮饲后第2、4、6、8、10周断脊处死,取脾脏称重并制作石蜡切片,HE染色,显微观察,研究微量元素钒对大白鼠脾脏生长发育的影响。结果表明,饮饲10mg/kg、20mg/kg、40 mg/kg钒,可见大白鼠脾脏重量较同一周龄对照组都有不同程度的增加,其中以20mg/kg组脾脏增重极显著(P<0.01);显微观察可见10mg/kg组、20mg/kg组、40 mg/kg组脾小结数量增多变大,动脉周围淋巴鞘增厚,椭球管腔变大,以10mg/kg组,20mg/kg组最为显著。60mg/kg组脾脏重量与同一周其他剂量组相比较轻,脾小结数量少且动脉周围淋巴鞘薄。说明大白鼠饮水中添加10~40 mg/kg钒是安全的,其中20 mg/kg钒对脾发育有促进作用,60 mg/kg钒对大白鼠脾具有抑制作用。 相似文献
32.
Rajesh Bhagwat S. P. Joshi Pradeep Salgia Achal Sepaha 《Indian journal of clinical biochemistry : IJCB》1997,12(1):81-85
Lipid abnormalities remain to be a major cause of early mortality in patients with chronic renal failure (CRF). In present
study, 114 (one hundred fourteen) CRF patients without any additional cause of dyslipidemia were divided into groups on the
basis of etiologies of CRF. Blood samples from each group were analyzed for total cholesterol, triglyceride and HDL cholesterol
along with blood urea nitrogen and serum creatinine. 25 healthy individuals without any obvious disease were taken as control.
Patients from all the groups showed a marked hypertriglyceridemia of 232 (SD±77) mg/dl (P<0.001) as compared to control. Levels
of HDL cholesterol were found to be significantly low 20 (±11) mg/dl (p<0.001) in all the groups. LDL cholesterol showed an
increase 104 (±30) mg/dl as compared to control group which is not statistically significant. Present study reveals that,
CRF patients show an uniform dyslipidemia irrespective of etiologies leading to CRF. This dyslipidemia is also independent
of serum creatinine levels. Although, these lipid abnormalities may not solely cause mortality in CRF patients, they may act
as modulators in accelerating atherogenesis which in turn cause early mortality in CRF patients. 相似文献
33.
目的:观察黄淮白山羊心脏冠状动脉的形态学特征,为其研究提供基础资料.方法:选择成年健康黄淮白山羊10头,采用颈静脉放血方式处死,其中6只心脏取不同管径大小的冠状动脉,多聚甲醛溶液固定,经水洗、脱水、二甲苯透明,石蜡包埋以HE、Masson三色及Verhoeff VG染色等步骤,观察冠状动脉的基本组织结构特点;另4只心脏标本经左、右冠状动脉口分别加压注入丁腈苯乙烯(ABS)丙酮溶液,经凝固成型后于70%浓盐酸溶液中腐蚀,观察冠状动脉的分支与分布.结果:黄淮白山羊的心脏左、右冠状动脉均起自于主动脉窦,行走于肺动脉与左心耳之间的左冠状动脉较粗大.黄淮白山羊弹性冠状动脉中弹性纤维含量丰富,外膜层有散在分布的块状平滑肌;肌性冠状动脉内外弹性膜结构清晰,中膜层主要由发达的平滑肌构成,含少量弹性纤维;微冠状动脉由一层内皮细胞构成.结论:黄淮白山羊冠状动脉属于左优势型,可分为弹性冠状动脉、肌性冠状动脉和微动脉三种类型. 相似文献
34.
35.
Mandibular defect occurs more frequently in recent years, and clinical repair operations via bone transplantation are difficult
to be further improved due to some intrinsic flaws. Tissue engineering, which is a hot research field of biomedical engineering,
provides a new direction for mandibular defect repair. As the basis and key part of tissue engineering, scaffolds have been
widely and deeply studied in regards to the basic theory, as well as the principle of biomaterial, structure, design, and
fabrication method. However, little research is targeted at tissue regeneration for clinic repair operations. Since mandibular
bone has a special structure, rather than uniform and regular structure in existing studies, a methodology based on tissue
engineering is proposed for mandibular defect repair in this paper. Key steps regarding scaffold digital design, such as external
shape design and internal microstructure design directly based on triangular meshes are discussed in detail. By analyzing
the theoretical model and the measured data from the test parts fabricated by rapid prototyping, the feasibility and effectiveness
of the proposed methodology are properly verified. More works about mechanical and biological improvements need to be done
to promote its clinical application in future. 相似文献
36.
Hong Zhang Rui-ying Li Xia Lu Zhen-zhen Mou Gui-mei Lin 《Journal of Zhejiang University. Science. B》2012,13(12):981-989
Docetaxel (DTX), as a member of taxoid family, has been widely used in the treatment of cancers. The present study prepared pH-sensitive DTX-loaded liposomes (DTX-Lips) by thin-film dispersion method and various physico-chemical and morphological properties were examined. The pH sensitivity of in vitro DTX release and the in vivo pharmacokinetics and tissue distribution using Kunming mice were also investigated. The mean particle size and zeta potential of DTX liposomes were (277±2) nm and (−32.60±0.26) mV, respectively. Additionally, in vitro drug release study showed that the cumulative release rate was 1.3 times more at pH 5.0 than at pH 7.4, suggesting a pH-dependent release ability of DTX-Lips. Pharmacokinetic and pharmaceutical studies in comparison with Duopafei® showed that the half-time period (t
1/2) and area under the curve (AUC) of DTX-Lips in mouse plasma were 1.8 times longer and 2.6 times higher, respectively, and that DTX-Lips selectively accumulated in macrophage-rich organs such as liver and spleen. These results together suggest that the DTX-Lips could be a promising formulation for the clinical administration of DTX. 相似文献
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38.
目的:探讨几种常见先天畸形胎儿脾脏的组织学结构特征和不同畸形对脾脏发育的影响。方法:解剖显露脾脏,常规取材,苏木精—伊红染色,光学显微镜下观察脾脏组织结构。结果:三类、6例先天畸形胎儿脾脏的组织学结构均表现程度不一的异常。结论:不同先天畸形对胎儿脾脏发育均产生影响。 相似文献
39.
Priyanka Srivastava Saumya Pandey Balraj Mittal Rama D. Mittal 《Indian journal of clinical biochemistry : IJCB》2013,28(1):13-18
Matrix metalloproteinase [MMP]-2 and tissue inhibitor of metalloproteinase [TIMP]-2 are emerging as pivotal players in inflammation and carcinogenesis. The present study aimed to evaluate the role of MMP-2 (−735C > T) [rs 2285053] and TIMP-2 (−418G > C) [rs 8179090] gene polymorphisms in cervical cancer susceptibility in Indian women. We recruited 200 cervical cancer patients from North India and 200 unrelated, age-matched, cancer-free healthy female controls of similar ethnicity. Genomic DNA extraction from peripheral blood samples, collected from the study subjects, was carried out using salting-out method. MMP-2 and TIMP-2 genotyping was performed using polymerase chain reaction-based restriction fragment length polymorphism. Our findings demonstrated no significant association between MMP-2 (−735C > T) and TIMP-2 (−418G > C) gene polymorphisms and the risk of developing cervical cancer in the study population. Further stratified analysis using a case-only study approach revealed that there was no effect of MMP-2/TIMP-2 polymorphisms on early and advanced stages of cervical cancer. Further MMP-2 and TIMP-2 polymorphisms did not modulate the risk in cervical cancer patients who smoked tobacco/cigarettes. Overall, the present study demonstrated a lack of association between MMP-2 and TIMP-2 gene polymorphisms and cervical cancer susceptibility in women of Northern India. 相似文献
40.
E. Cattrysse E. Zinzen D. Caboor W. Duquet P. Van Roy J.P. Clarys 《Journal of sports sciences》2013,31(9):717-723
In a group of 699 Belgian nursing professionals, we estimated body composition using the four-component anthropometric model, relying on the equations originally formulated by Matiegka in 1921 and later revised by Drinkwater and colleagues. We estimated muscle mass using the more recent formula proposed by Martin and co-workers. A discrepancy was noted between estimated total body mass and 'assessed' mass, suggesting erroneous estimations of the components. 相似文献