查询词典 lethal dose

Results The UV-B treatment caused the declines of chlorophyll content, soluble protein content and water content of leaves, besides, dose-effect was existed. The decline of 30 μW/cm^2 treatment was bigger than that of 15 μW/cm^2 treatment. The influences of UV-B radiation on carotenoid content and anthocyanidin content were similar; the change trends were declined firstly then increased. The UV-B treatment with two doses restrained the electron transport of PSⅡ, particularly; the inhibitory effect was biggest after treated 2h, and then this effect was declined in 4, 6 and 8 h, so the dose-effect was existed. The UV-B radiation with two doses restricted photosynthetic rate and the inhibitory effect increased with the increase of treatment time. The high dose treatment caused huge damage to membrane system, while the result of low dose treatment was not obvious.

结果］UV-B处理导致叶绿素、可溶性蛋白含量以及含水量都降低，且存在剂量效应，30μW/平方公分处理的降幅大于15μW/平方公分；UV-B辐射处理对类胡萝卜素含量的影响与花青素相同，均表现为先下降后上升的趋势，2种剂量间差异不大；2种剂量的UV-B处理均抑制了PSⅡ的电子传递，尤其是处理2 h的抑制作用最大，4、6和8 h的抑制作用有所缓解，且存在剂量效应；2种剂量的UV-B辐射均抑制了叶片的光合速率，随着照射时间的延长抑制效应加大；高剂量UV-B处理对膜系统的损伤较大，低剂量UV-B处理结果不明显。

objective the effects of anthocyanin pigment from maize purple plant on resisting lipid peroxidation were investigated.methods the inhibition of anthocanin pigment from maize purple plant was examined in vitro that autcoxudation of lecithin liposome system induced by fe2+.50 mice were randomly divided into 5 groups.vehicle and different dose anthocyanin pigment from maize purple plant were given respectively,and then experimental injury of mice liver was induced to make use of bromobenzene and the content of mda was determined in liver homogenate.results the inhibition rates of anthocyanin pigment from maize purple plant on linoleic acid oxidation was higher that of ascorbic ascorbic acids.the content of mda in homogenate in middle and high dose of pigment were significantly lower than that in low dose and the injured control group.there were no significat differences in the content of mda in homogenate between low dose group and injury control group.conclusion the anthocyanin pigment from maize purple plant have the capability to resist lipid peroxide.

目的 探讨玉米紫色植株色素抗脂质过氧化的作用。方法体外实验测定玉米紫色植株花色苷色素在fe2+引发的卵磷脂脂质体体系中抗氧化活性。体内实验，取50只小鼠随机分成5组，分别给予溶媒和不同剂量的色素，然后采用溴代苯致实验性肝损伤，测定肝匀浆的丙二醛含量。结果在由fe2+引发的卵磷脂脂质体体系中玉米紫色植株色素对脂质过氧化有明显的抑制作用，抑制率随样品的浓度增高而增大，并且明显优于抗坏血酸。在溴代苯致小鼠实验性肝损伤模型实验中，中、高剂量组的丙二醛含量均低于损伤模型组。低剂量组和损伤模型组比较丙二醛含量差异无统计学意义。

To collect forty-five NSCLC patiens that correspond to our qualification. All the object were treated by LCEHART radiated by 6MV/15MV X-ray, antero-three weeks adopted normal radiotherapy 2GY/F/d,the dose of the large radiation field reached 30GY/15F/3W then adopted LCEHART, the fractionation dose of the forth week, the fifth week and the sixth week was,1.3GY/F/Bid, 1.4GY/F/Bid, 1.5GY/F/Bid, the interval was six to eight hours, the total dose reached 72GY/45F/6W, and the dose of chorda spinalis was restricted below 40GY.

收集符合入组条件的NSCLC43例，采用后程逐量加速超分割放射治疗(NSCLC：采用6MV/15MV的X线照射，前3周为常规照射2GY/F/d，总剂量30GY/15F/3W即开始后程逐量加速超分割放疗，第4，5，6周每周分次照射剂量分别为1.3GY，1.4GY，1.5GY，每天2次照射，间隔6-8小时，均为每周5天，总剂量72GY/45F/6W，脊髓剂量限制在40GY以下)同步两周期化疗(NP方案：盖诺25mg/m2 ，静滴d1、d8，顺铂25mg/m2，静滴d1-3，同时水化、利尿、止吐)。

After controlsomatosympathetic reflex responses were obtained, midazolamwas administered IV to four groups of randomly allocated catsas follows: brain-intact cats at a dose of 0.03 mg/kg, brain-intactcats at a dose of 0.1 mg/kg, brain-intact cats at a dose of0.5 mg/kg, and decerebrate cats at a dose of 0.1 mg/kg.

控制下的体－交感反射产生后，我们把猫随机分成四组，分别静脉注射如下剂量的咪唑安定：大脑完整的猫注射剂量分别为0.03mg/kg 、 0.1mg/kg 、0.5mg/kg；去大脑的猫注射剂量为0.1mg/kg。

Methods Eighty Kunming mice were equally randomized into 8 groups: normal group, model group, vitamin E 90 mgkg^(-1d^(-1) group, high-and low-dose RPM protein 20 and 5 mgkg^(-1d^(-1)respectively groups, high-and low-dose RPM anthraquinone glycoside 28 and 7 mgkg^(-1d^(-1) respectively groups, combination (low-dose RPM protein and low-dose RPM anthraquinone glycosides) group. Except the normal group, the mice in other groups received subcutaneous injection of D-galactose to indue the aging model.

选用昆明种小鼠80只，随机分为8组：正常组，模型组，维生素E组（剂量为90mgkg^(-1)d^(-1)），何首乌蛋白质高、低剂量组（剂量分别为20、5mgkg^(-1)d^(-1)），何首乌蒽醌苷高、低剂量组（剂量分别为28、7mg kg^(-1)d^(-1)），AGRPM与PRPM混合组（混合组，均取两者低剂量）；除正常组外，其他组均采用长期（7周）皮下注射D-半乳糖复制衰老小鼠模型。

High dose copper induced decrease ofⅠ,Ⅱ,Ⅳ-2 content and increase ofⅢof spectrin. High dose copper can also decrease SA, PE content and increase SM, PS content.These showed that high dose can induce injury of erythrocyte by changing elementary structure and moity of membrane protein and membrane phospholipid, which may be one of the mechanisms of goat erythrocyte damage induced by high dose copper. 2. High copper caused the decrease of SOD and GSH-PX activity and the increase of MDA content.

高铜能引起红细胞膜收缩蛋白Ⅰ、Ⅱ及区带Ⅳ-2蛋白含量均显著降低，而区带Ⅲ蛋白含量明显增高，红细胞膜唾液酸含量降低，磷脂酰乙醇胺含量降低，神经鞘磷脂和磷脂酰丝氨酸含量升高，表明高铜能够改变红细胞膜蛋白和磷脂等基本结构和组成成分，这可能是高铜致羊红细胞损伤的机制之一。

Results Fibroblast ceils were divided into three groups, and cell proliferation was inhibited in the low-dose group, but promoted in the middle-dose group, while the collagen synthesis was inhibited in the middle-dose group, but pro- moted in the high-dose group.

结果激光照射剂量由低至高可分为3个剂量段，激光强度在第一剂量段时的生物调节效应主要表现为抑制细胞增殖，在第二剂黾段时则能促进细胞增殖并抑制胶原合成，在第三剂量段时间则可促进腔原合成，且每个剂量段内的激光生物调节效应与照射剂量间大致单线性相关。

The results showed that the irradiation treatment in the dose of 2.0-8.0kGy is not significantly effective to the contents of total sugar, crude protein and crude fat in walnut powder. The content of crude fiber in irradiated walnut powder increased, but not significantly. The irradiation had barely change on the contents of the lauric acid and myristic acid, and non-significant effects on the contents of palmitic acid, palmitoleic acid, stearic acid, leinoleic acid, arachidic acid and linolenic Acid. However, the irradiation contributed to significant increase in the content of oleic acid with the irradiation dose. When irradiation dose reached 8.0kGy, the content of oleic acid had an increase of 4.3%. Irradiation will not change the sensory index of walnut powder much when irradiation dose is lower than 8.0kGy.

结果表明：剂量为2.0～8.0kGy时，辐照对核桃粉中的总糖、粗蛋白和粗脂肪含量无显著影响；辐照后的粗纤维含量有一定的增加，但不显著；辐照对核桃粉中的月桂酸和肉豆蔻酸含量基本没有影响，对棕榈酸、棕榈油酸、硬脂酸、亚油酸、花生酸和亚麻酸含量有一定的影响，但不显著；辐照后核桃粉中的油酸含量随辐照剂量的上升而显著增加，剂量达到8.0kGy时，油酸含量增加了4.3%。8.0kGy以下辐照对核桃粉色泽、气味、口感无明显改变。

Two hundred 16-day-old of age commercial broiler chickens were randomly divided into 4 groups as follows: 50 birds were exposed to normal temperature (20℃) and peritoneally injected with normal saline as control group; 50 birds were exposed to low temperature (7-9℃) and peritoneally injected normal saline as low temperature group; 50 birds were exposed to low temperature and peritoneally injected with low dose BQ123 as low temperature low dose BQ123 group; 50 birds were exposed to low temperature and peritoneally injected high dose BQ123 as low temperature high dose BQ123 group.

本试验采用高选择性ETA受体拮抗剂BQ123预处理低温肉鸡，探讨ET在低温诱发AS模型的肺血管重塑和肺动脉高压发生发展中的作用。200只16日龄AA肉鸡随机均分为4组：常温(20℃)对照组、低温(7～9℃)对照组、低温低剂量BQ123组和低温高剂量BQ123组。23日龄、30日龄时进行肺动脉压的测定，肺组织取材、石蜡切片，Weigert间苯二酚复红染色。

Results Recurrence and metastasis in surgery, full-dose preoperative intracavitary irradiation, non full-dose preoperative intracavitary and radiotherapy alone groups were 19.8%, 8.1%, 22.2% and 34.6%, respectively. The recurrent rates of vaginal stump were 6.2%, 1.6%, 11.1% and 11.5%, respectively. The rates of proctitis and cystitis in full dose preoperative intracavitary irradiation group were 3.2% and 3.2%, 2.8 and 0.0% in non-full dose preoperative intracavitay irradiation group, and 0.0% and 3.8% in radiotherapy alone group.

结果手术组、术前腔内全量放疗组、术前腔内非全量放疗组及单纯放疗组的总复发转移率分别为19.8％、8.1％、22.2％、34.6％，其中阴道残断复发率分别为6.2％、1.6％、11.1％、11.5％；放疗并发症中，放射性直肠炎、膀胱炎的发生率，术前腔内全量放疗组均为3.2％，术前腔内非全量放疗组分别为2.8％、0.0％，单纯放疗组分别为0.0％、3.8％。

The statistical analysis of this large set of mutations has led us to propose a diagnostic strategy that should help with the molecular work-up of optic neuropathies.

这一大系列基因突变的统计学分析引导我们提出一个诊断策略，可以帮助我们对视神经病变进行分子学的诊断检查。

The results show that the pipe grouting changes the mechanical parameters of surrounding rocks to achieve the security of engineering objectives by reinforcing surrounding rocks and bolcking the water.

研究表明：小导管注浆一方面改变了围岩的力学参数，另一方面利用浆液的固结特性可以实现堵水和加固围岩的工程目标，使隧道在开挖过程中的安全得到保障。