查询词典 hypoxia

Sanchez ET ,Botella LM ,Velasco B ,et al. Synergistic cooperation between hypoxia and transforming growth factor2beta pathways on humanvascular endothelial growth factor gene expression. J Biol Chem ,2001,19,276:38527238535.[3] Blancher C,Moore JW,Talks kl,et al.Relationship of hyposia-inducible factor HIF-1alpha expression to vascular endothelial growth factor I nduction and hypoxia survival in human breast cancer cell lines.

肝细胞癌中缺氧诱导因子-1α、热休克蛋白70的表达】；综上所述，肝细胞癌发生后，由于血供不足诱导HIF-1α过度表达，应激状态下产生的HSP70通过减轻缺血性损伤，增加毛细血管的生成及减轻细胞凋亡等途径使肿瘤细胞的增殖、移行加快，促进恶性肿瘤的生长、浸润和转移，使肿瘤细胞在适应缺氧、能量代谢、细胞凋亡及转移中起重要作用。

The present results suggest that (1) NA is not mainly concerned with spontaneous discharges of chemoreceptor sensitive to hypoxia, but does elicit an increase in spontaneous discharges, and (2) the increase of chemosensory unit discharges produced by hypoxia can be inhibited by yohimbine.

结果提示：(1)NA不是维持颈动脉体对缺氧敏感的化学感受纤维自发放电活动的主要因素，但给予NA能增加此类纤维自发放电的频率；(2)在低氧过程中，给予#alpha#_(2)受体拮抗剂育亨宾，可减弱这类纤维对缺氧反应的程度。

The dark adaptation being decreased during acute hypoxia exposure is well known, but the effect of hypoxia on other visual related function is less investigated.

在视觉系统方面，缺氧对暗适应功能的影响已经公认，但视觉功能其他方面的影响仍不够深入，需要进一步研究。

Methods: 27 SD rats were randomly divided into 3 groups: normal oxygen group, hypoxia group and combinational gaoyuanchun grain group (The following named remedy group). Put remedy group and and hypoxia group to decompressure chamber on time, decrease pressure to 0.06MPa, moved them out of decompression chamber 5 hours latter, and determined rats' brains oxygen freee radical changes of each group.

将SD大鼠27只随机分为常氧组、低氧组和复方高原春颗粒组，将药物组和低氧组按时入低压舱减压至0.06MPa，5h后减压出舱，测定每组大鼠脑匀浆氧自由基的变化。

Objective: As an important adaptation mechanism to hypoxia, erythrocytosis resulting from high altitude hypoxia maintains an adequate Oa delivery in blood.

目的：高原缺氧时红细胞增多，红细胞适度增多可以改善组织供氧，是缺氧习服-适应的重要机制之一。

An O2-labile protein (hypoxia-inducible factor 1, HIF-1) has been identified that is hydroxylated and degraded under normoxic conditions but actie in hypoxia, where it enhances Epo gene transcription resulting in eleated hemoglobin leels and O2 capacity of the blood. The stimulation of Epo production at lowered arterial O2 tension can be maladaptie, if erythrocytosis deelops such as seen in high altitude habitants.

此途径因提高了体内血红蛋白水平，加强了epo基因转录和氧运输能力。epo 在动脉低氧情况下的产生使机体不适应－－这种情况就如同世居高原人群中的细胞因子发生变化一样。

The acute altitude hypoxia and fulminating altitude hypoxia is one of the most harmful environmental factors for pilots.

在现代航空中，虽然有良好的密封增压座舱、供氧防护装备等条件，但由于飞机密封增压座舱失密封、面具佩戴不严或供氧系统故障等，仍然会引起飞行人员不同程度的缺氧，从而可能危机健康。

Methods 20 rats were randomly divided into A, B, C, D and E group. The models of cerebral anoxia in group A and C were made by hypopiesia and hypoxia, and the models of hypoxia-reoxgenation were made in group B and D. 24h and 1h before establishment of models, ginsenoside Rb3 was injected peritoneally in rats of group C and D, respectively. The number and form of GABA-like immunoreactive neurons in hippocampus CA1 area of rats after brain hypoxia-reoxgenation were investigated with immunohistochemistry.

將大鼠隨机分为A、B、C、D、E5组，A、C组以低压低氧暴露製作大鼠脑缺氧模型，B、D组为缺氧－复氧模型。C、D组动物分别於制模前24h、1h 2次腹腔注射人参皂甙Rh3溶液；採用免疫组化法，观察各组大鼠在缺氧及缺氧－复氧处理后海马CA1区GABA免疫反应阳性细胞形態及数量的变化，並与正常对照组比较。

Adult Wistar rats, supplied by the Animal Center of that university,were divided by random lotting into control group, acute hypoxia group, and chronic hypoxia group.Hypobaric chamber was used to simulate hypoxia for 2and 30 days at an altitude of

成年Wistar大鼠，校动物中心提供，按随机抽签法分为对照组、急性缺氧组和慢性缺氧组，低压舱模拟海拔5 000 m连续缺氧2，30 d，复制动物急性和慢性缺氧模型。

Alone cold stress, simulated 2 km hypoxia stress (4 hours/day, continuation for 2 days)+ cold, 2 km hypoxia stress, 2 km hypoxia stress + restraint stress and alone restraint stress all significantly decreased rats body weight gain.

与各自的单独应激相比较，冷应激+5km低氧(4小时／天，连续2天)的复合应激，束缚应激+5km低氧的复合应激显著地抑制了大鼠体重的增重。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。