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and safety
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     Study on Fatigue Reliability and Safety Control of Steel Structure Crane in Service
     在役钢结构吊车梁疲劳可靠性与安全控制研究
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     Study on Experimentation and Theory of Detonation and Safety for Composition Explosives
     混合炸药爆轰与安全性能实验与理论研究
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     Research on Chaos and Safety of Nonlinear System for Tailings Dam
     尾矿坝非线性系统混沌与安全研究
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     Cracking Analysis and Safety Evaluation for High Arch Dam
     高拱坝开裂分析及安全评价
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     Study on Hydrodynamic Characteristics and Safety of Protecting Structure in High Dam Plunge Pool
     高坝消力塘水动力特性与防护结构的安全研究
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     The Preliminary Study on Efficacy and Safety of Lamifudine and Interferon α Therapy for Decrease of the HBV Loading in Blood of HBV Transgenic Mice during Pregnancy
     拉米夫定和干扰素α对孕期降低HBV转基因小鼠血中HBV载量有效性和安全性的初步研究
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     The Efficacy and Safety of Cyclosporine A after Renal Transplantation: A Systematic Review
     肾移植术后应用环孢素A有效性及安全性系列研究的系统评价
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     Effectiveness and Safety Studies of Cyadox in Broilers
     喹赛多在肉鸡的有效性与安全性研究
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     The Research about Protective Efficiency and Safety of DNA Vaccine Against Lymphocystis Disease Virus (LCDV)
     淋巴囊肿病毒(Lymphocystis disease virus)核酸疫苗的免疫效果评价及安全性研究
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     Study on Designing Theory and Safety of Slope Reinforced Pile-Anchor
     桩锚结构设计理论及安全性评价
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     safety.
     ·安全方面。
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     and safety.
     安全性指标。
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     FOODSTUFF SAFETY
     三绿工程为食品安全保驾护航
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     Speed And Safety
     联邦快递与全球儿童安全网络推出“速度与安全日”
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Logical-Probabilistic Calculus: A Tool for Studying the Reliability and Safety of Structurally Complex Systems
      
Commonly, the zonal borders of preferred habitats shifted southward to better climatic, feeding, and safety conditions.
      
Radiation-Chemical Resistance of Anion Exchangers and Safety of Sorption Processes in Nitric Acid Solutions: II.
      
Radiation-Chemical Resistance of Anion Exchangers and Safety of Sorption Processes in Nitric Acid Solutions: III.
      
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2,3-Dimercaptosuccinic acid-S_2~(35) has been synthesized as follows: Sodium sulphide S~(35) (Ⅰ) was oxidized with iodine to give sulphur-S~(35) (Ⅱ). The latter was convertcd into phosphorous pentasulphide-S_5~(35) (Ⅲ) by the action of red phosphorous. Interaction of Ⅲ and acetic acid gave thiolacetic acid-S~(35) (Ⅳ). 2,3-Bis-acetylthiosuccinic acid-S_2~(35) (Ⅴ) was obtained by the addition of compound Ⅳ to acetylenedicarboxylic acid. Upon hydrolysis of V the desired 2,3-dimercaptosuccinic acid-S_2~(35) (Ⅵ)...

2,3-Dimercaptosuccinic acid-S_2~(35) has been synthesized as follows: Sodium sulphide S~(35) (Ⅰ) was oxidized with iodine to give sulphur-S~(35) (Ⅱ). The latter was convertcd into phosphorous pentasulphide-S_5~(35) (Ⅲ) by the action of red phosphorous. Interaction of Ⅲ and acetic acid gave thiolacetic acid-S~(35) (Ⅳ). 2,3-Bis-acetylthiosuccinic acid-S_2~(35) (Ⅴ) was obtained by the addition of compound Ⅳ to acetylenedicarboxylic acid. Upon hydrolysis of V the desired 2,3-dimercaptosuccinic acid-S_2~(35) (Ⅵ) was obtained. This method has been found to be satisfactory for the synthesis with the advantages of convenience and safety in handling.

本工作简化2,3-二巯基丁二酸的合成步骤,以半微量法制各其硫~(35)标记的化合物(Ⅵ)。此法操作步骤较为简便安全,产品纯度及产率均满意。

The present paper is concerned with the toxicity of dapterex to certain species of experimental and domestic animals.The results are as follows: 1.The LD_(50) of dipterex given by intraperitoneal injection and oral administration to albino mice are shown to be 450 and 660mg/kg respectively.Same susceptibility to the drug is found in male and female.Exposed 42 days,the aqueous preparation manifests a marked increase in its toxicity. 2.Single intraperitoneal injection of atropine (10mg/kg); concomitant intraperitoneal...

The present paper is concerned with the toxicity of dapterex to certain species of experimental and domestic animals.The results are as follows: 1.The LD_(50) of dipterex given by intraperitoneal injection and oral administration to albino mice are shown to be 450 and 660mg/kg respectively.Same susceptibility to the drug is found in male and female.Exposed 42 days,the aqueous preparation manifests a marked increase in its toxicity. 2.Single intraperitoneal injection of atropine (10mg/kg); concomitant intraperitoneal injection of atropine (10mg/kg) and PAM (50mg/kg); atropine and coramine (120mg/kg); and atropine and corazol (30mg/kg) manifest a marked protective effect on mice against intoxication by dipterex.The acute LD_(50) of the drug has to be increased from 450 to 618,1,300,1,312 and 1,217mg/kg respectively. 3.It is found that chickens and ducks are very susceptible to dipterex.The LD_(50) by oral administration are 46.6 and 44.8mg/kg respectively.The absolute lethal dose for cats after intraperitoneal injection is 300mg/kg.The toxic doses of dipterex by oral administration for pigs,sheep,cattle and horses are 65,200,100 and 50mg/kg respectively; 50mg/kg for pigs and 65mg/kg for sheep by intramuscular injection.The toxic effect of dipterex is primarily shown in the digestive system after oral administration.Intramuscular injection of dipterex to sheep produces very marked symptoms of respiratory system and local irritation. 4.Considering the anthelmintic efficiency and safety,it is preferrable to a minister dipterex by oral rather than parenteral.Recommended doses by oral are 100mg/kg for pigs and sheep,50-100mg/kg for cattle and 30mg/kg for horses.

一、国产敌百虫对小白鼠腹腔注射的LD_(50)剂量为450mg/kg,口服LD_(50)剂量为660mg/kg。雌雄小白鼠对敌百虫毒性的敏感性,无性别差异。敌百虫水溶液在室溫下貯放42天后,毒性明显增加。二、硫酸阿託品10mg/kg,PAM50mg/kg+阿託品10mg/kg,尼可他米120mg/kg+阿託品10mg/kg,五甲烯四氮唑30mg/kg+阿託晶10mg/kg对接受中毒量敌百虫的小白鼠,均有明显的保护作用,它們能分別将敌百虫的急性LD_(50)剂量提高到618、1300、1312和1217mg/kg。三、鸡、鴨对敌百虫的毒性非常敏感,口服LD_(50)剂量分別为46.6和44.8 mg/kg。猫腹胜注射的絕对致死量为300mg/kg。各种家畜口服敌百虫的中毒量为:猪65、羊200、牛100、馬50mg/kg;肌肉注射的中毒量为:猪50、羊65mg/kg。口服敌百虫的毒性反应,主要表現于消化系統。肌肉注射敌百虫,在羊呼吸系統和注射局部的反应甚为强烈。四、根据驅虫功效和反应程度,作者建議口服比注射給药安全,推荐的口服驅虫剂量为,猪100mg/kg,羊100mg/kg,牛50—100mg/kg,馬30m...

一、国产敌百虫对小白鼠腹腔注射的LD_(50)剂量为450mg/kg,口服LD_(50)剂量为660mg/kg。雌雄小白鼠对敌百虫毒性的敏感性,无性别差异。敌百虫水溶液在室溫下貯放42天后,毒性明显增加。二、硫酸阿託品10mg/kg,PAM50mg/kg+阿託品10mg/kg,尼可他米120mg/kg+阿託品10mg/kg,五甲烯四氮唑30mg/kg+阿託晶10mg/kg对接受中毒量敌百虫的小白鼠,均有明显的保护作用,它們能分別将敌百虫的急性LD_(50)剂量提高到618、1300、1312和1217mg/kg。三、鸡、鴨对敌百虫的毒性非常敏感,口服LD_(50)剂量分別为46.6和44.8 mg/kg。猫腹胜注射的絕对致死量为300mg/kg。各种家畜口服敌百虫的中毒量为:猪65、羊200、牛100、馬50mg/kg;肌肉注射的中毒量为:猪50、羊65mg/kg。口服敌百虫的毒性反应,主要表現于消化系統。肌肉注射敌百虫,在羊呼吸系統和注射局部的反应甚为强烈。四、根据驅虫功效和反应程度,作者建議口服比注射給药安全,推荐的口服驅虫剂量为,猪100mg/kg,羊100mg/kg,牛50—100mg/kg,馬30mg/kg。五、敌百虫的驅虫作用量对蠕虫直接发生作用,并非由于增强宿主的腸道蠕动所致。

Test results as well as experimental techniques in the investigation of steel-lined pressure chambers and conduits buried in solid rock are briefly summarized and analyzed whereby the following conclusions are drawn: 1. The concrete-rock carries 55—85% of internal pressure. Stresses in ordinary steel-linings are comparatively low. 2. An important new subject is the in situ buckling test of steel linings under external water pressure. Further investigations are needed to simulate actual conditions. 3. It is of...

Test results as well as experimental techniques in the investigation of steel-lined pressure chambers and conduits buried in solid rock are briefly summarized and analyzed whereby the following conclusions are drawn: 1. The concrete-rock carries 55—85% of internal pressure. Stresses in ordinary steel-linings are comparatively low. 2. An important new subject is the in situ buckling test of steel linings under external water pressure. Further investigations are needed to simulate actual conditions. 3. It is of paramount importance to have well back-filled concrete and high quality grouting to transmit internal pressure onto the external rock. 4. Grout holes must be carefully plugged and sealed to prevent serious leakage. 5. Temperature effects should be carefully observed. The temperature of water for pressure testing should not be too low to induce brittle fracture. 6. Due consideration should be paid for proper selection of loading and unloading speeds and pressure divisions for accuracy and safety. 7. It is recommended to adopt several different types of deformation measuring apparatus in order to check against each other. Due to the irregular deformation of steel linings, it is highly recommended to measure their total deformations. It is emphasized that long-term observations should be systematically carried out to account for temperature and creep effects under operating conditions.

本文介绍了国內外埋藏式高压钢管道试验研究工作的进展情况、试验內容和方法、量测设备以及某些工程的试验成果,并进行了综合分析,得出以下几点结论: 1.钢衬周围的混凝土-岩石一般承担55~85%的內水压力,因而研究其力学特征是很重要的.在设计荷载下,实测的钢衬应力都不大,埋藏管的总体安全度都较高。 2.外水压力作用下钢衬的屈曲试验是新课题,目前在现場进行的试验研究工作不多,但外水压力往往是设计的控制因素,今后应开展更多的工作. 3.回填混凝土的质量和灌浆工作非常重要,它直接影响钢衬、混擬土和岩石的联合作用. 4.灌浆孔的填塞封孔工作应作好,否则将影响管道的防渗性能。 5.试验时的水溫和溫度变化对于试验成果的影响,也应给予注意。 6.试验程序、试验压力、分级大小、加卸荷速度等都需仔细研究后确定. 7.变形测量最好同时采用几种方法,以便补充验证.由于钢衬的变形不是轴对称的,设法直接测出钢衬的总体变形是很有意义的. 此外,在运转条件下,长期系统地观测溫度和徐变的影响也是很重要的.

 
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