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31.
化学治疗是肿瘤综合性治疗的重要组成部分,为了增加化学治疗的效果,人们采取了多种措施,其中温热疗法、配伍用药、加入生物因子或物理因子等措施都收到了一定效果。而很多肿瘤具有生物性耐药特点,因此临床上疗效不佳的病例也层出不穷。 相似文献
32.
赵荧 《北京大学学报(医学版)》1995,(1)
简便的Masson-Fantana技术北京医科大学组织胚胎教研室赵荧我们实验室对石蜡切片的银染反应Masson-Fan-tana技术进行了改进,主要是降低硝酸银液的浓度,缩短银染时间,使组织切片既要显示银染的细胞又要有浅色的组织背景,整体组织结构清晰... 相似文献
33.
BACKGROUND: Chemical induction has been shown to be effective at promoting the differentiation of bone marrow-derived mesenchymal stem cells (MSCs). However, these inductors have cytotoxicity side effects that may damage cells over time. Traditional Chinese medicines avoid this disadvantage while still producing effective induction.
OBJECTIVE: To investigate the influence of RadixAstragafi (Huangql) on the differentiation of MSCs.
DESIGN, TIME AND SETTING: In vitro study of traditional Chinese medicine in neural stem cell differentiation. The experiment was performed at the Central Laboratory of Hebei North University between April and June 2007.
MATERIALS: Radix Astragafi solution (lot No. 060105; license No. Z53021585) was purchased from Dali Pharmaceutical Co., Ltd., China; rabbit anti-rat nestin, rabbit anti-rat neuron-specific enolase (NSE), mouse anti-rat microtubule-associated protein 2, and rabbit anti-rat glial fibrillary acidic protein were purchased from Wuhan Boster, China.
METHODS: Whole bone marrow was isolated from the femur and tibia of 6-week-old male Wistar rats and subcultured. The fourth passage of MSCs were harvested and induced by different concentrations (50, 100, 200, 400 g/L) of Radix Astragali.
MAIN OUTCOME MEASURES: Hematoxylin-eosin staining was used to observe MSC morphology after 24 hours of induction. Immunocytochemistry was employed to observe the expression of NSE (specific neuronal marker), nestin (marker of neural stem cell), glial fibrillary acidic protein and microtubule-associated protein 2 (markers of astrocytes).
RESULTS: Following Radix Astragali treatment, changes occurred in cell morphology including: cell body pyknosis; thin and long processes formed in some cells, with growth corresponding to drug concentration and induction time; and the formation of network-like connections between some cells. With increasing drug concentration and induction time, nestin expression was upregulated, and the number of positive cells increased; cells produced NSE, glial fibrillary acidic protein and microtubule-associated protein 2; nestin was expressed earlier than glial fibrillary acidic protein and microtubule-associated protein 2 expression. In addition, the number of NSE-positive cells was increased significantly more than glial fibrillary acidic protein-positive cells.
CONCLUSION: Radix Astragafi promoted process formation in stem cells. It may induce the differentiation of MSCs into neural stem cells, and subsequently into neuronal- and glial-like cells. Radix Astragafi exhibits stronger inductive effect on neuronal differentiation than glial differentiation of MSCs. 相似文献
OBJECTIVE: To investigate the influence of RadixAstragafi (Huangql) on the differentiation of MSCs.
DESIGN, TIME AND SETTING: In vitro study of traditional Chinese medicine in neural stem cell differentiation. The experiment was performed at the Central Laboratory of Hebei North University between April and June 2007.
MATERIALS: Radix Astragafi solution (lot No. 060105; license No. Z53021585) was purchased from Dali Pharmaceutical Co., Ltd., China; rabbit anti-rat nestin, rabbit anti-rat neuron-specific enolase (NSE), mouse anti-rat microtubule-associated protein 2, and rabbit anti-rat glial fibrillary acidic protein were purchased from Wuhan Boster, China.
METHODS: Whole bone marrow was isolated from the femur and tibia of 6-week-old male Wistar rats and subcultured. The fourth passage of MSCs were harvested and induced by different concentrations (50, 100, 200, 400 g/L) of Radix Astragali.
MAIN OUTCOME MEASURES: Hematoxylin-eosin staining was used to observe MSC morphology after 24 hours of induction. Immunocytochemistry was employed to observe the expression of NSE (specific neuronal marker), nestin (marker of neural stem cell), glial fibrillary acidic protein and microtubule-associated protein 2 (markers of astrocytes).
RESULTS: Following Radix Astragali treatment, changes occurred in cell morphology including: cell body pyknosis; thin and long processes formed in some cells, with growth corresponding to drug concentration and induction time; and the formation of network-like connections between some cells. With increasing drug concentration and induction time, nestin expression was upregulated, and the number of positive cells increased; cells produced NSE, glial fibrillary acidic protein and microtubule-associated protein 2; nestin was expressed earlier than glial fibrillary acidic protein and microtubule-associated protein 2 expression. In addition, the number of NSE-positive cells was increased significantly more than glial fibrillary acidic protein-positive cells.
CONCLUSION: Radix Astragafi promoted process formation in stem cells. It may induce the differentiation of MSCs into neural stem cells, and subsequently into neuronal- and glial-like cells. Radix Astragafi exhibits stronger inductive effect on neuronal differentiation than glial differentiation of MSCs. 相似文献
34.
日常组织染色中,常需同时显示两种纤维,即胶原纤维和弹性纤维,以研究纤维间相互共存的关系,有时还要观察纤维与其他结构(肌组织、软骨等)的伴随关系.以往多采用邻片染色方式观察纤维的形态结构、数量变化以及与其他结构的相互关系,但有可能受到制片技术或染色操作等因素的作用,尤其染色后的分色程度的控制,致使显微镜下被观察对象间存在一定差异而影响染色结果的比对.本研究的组合染色,对不同组织,尤其对动脉管壁的染色与观察均能呈现较理想的效果. 相似文献
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36.
糖尿病肾病临床早期诊断的探讨 总被引:1,自引:0,他引:1
本文对67名住院DM患者,采用放射核素法测定UAE及Uβ2MG,观察肾功能变化,探讨DN的早期诊断。结果,36例Alb(-)性患者,检测UAE及Uβ2MG的阳性率分别为33%、11%;21例Alb(±~+)者分别为57%、29%;10例Alb(++~++++)者分别为100%、70%。提示UAE、Uβ2MG检测能早期准确预测DN的发生及肾小球功能改变。因此,可做为DN早期诊断手续,值得推广。 相似文献
37.
目的:分析研究呼吸窘迫综合征的极低体重新生儿采用经鼻间歇正压通气联合肺表面活性物质治疗方法的效果。方法:回顾性分析2019年11月至2021年10月于我院产科分娩的116例确诊呼吸窘迫综合征的极低体重新生儿的临床资料,依据治疗方法的不同分为观察组和对照组,对照组患儿进行常规经鼻间歇正压通气治疗,观察组患儿进行肺表面活性物质联合经鼻间歇正压通气治疗。对比两组患儿治疗前后的血气分析、治疗效果、呼吸机辅助治疗时间、住院时间和各种并发症分布。结果:经不同方法治疗后,两组患儿治疗后pH值、PaO2、血氧饱和度均明显高于治疗前,PaCO2均明显低于治疗前,差异均有统计学意义(P<0.05)。观察组pH值、PaO2、PaCO2、血氧饱和度的治疗前后差值明显大于对照组,差异有统计学意义(P<0.05)。观察组患儿对于新生儿呼吸窘迫综合征的治疗总有效率显著高于对照组(P<0.05)。观察组患儿呼吸机辅助治疗时间、住院时间、有创机械通气时间均短于对照组(P<0.05)。观察组患儿相关并发症的总发... 相似文献
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40.
生存素在乳腺癌和宫颈癌中的表达及其临床意义 总被引:1,自引:0,他引:1
目的 探讨生存素(Survivin)在乳腺癌和宫颈癌中的表达及其临床意义.方法应用免疫组织化学方法检测66例乳腺癌、22例乳腺腺瘤、宫颈鳞状细胞癌46例和宫颈上皮不典型增生20例中Survivin的表达.结果①Survivin表达的阳性率在乳腺腺瘤组织中明显高于乳腺癌组织(P<0.05﹚,宫颈癌明显高于宫颈上皮不典型增生(P<0.05);②Survivin与患者的年龄和乳腺癌的位置无关(P>0.05),而与淋巴结是否转移有关(P<0.05).结论①Survivin蛋白可以通过抑制细胞凋亡对乳腺癌和宫颈癌的发生、发展起重要作用;②检测乳腺癌和宫颈癌中Survivin的表达对制定化疗方案具有重要意义. 相似文献