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     The Name
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     In the name of family
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     (2) the name and the reality;
     2 名实之争 ; 3 言意之辩。
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The piezoelectricity of a pressure-treated cellular polypropylene (PP) (commercially available, trade name PQ50) film electret was studied by the measurement of direct-and inverse-piezoelectric d33 coefficient.
      
The intravenous injection of the NO-synthase inhibitor L-NAME (50 mg/kg) also completely abolished the cardioprotective effect of δ-OR stimulation.
      
An inhibitor of NO-synthase, L-NAME (NG-nitroarginine, methyl ester), failed to inhibit Na+,K+-ATPase.
      
However, the presence of L-NAME abolished the inhibition of Na+,K+-ATPase by high concentrations of L-arginine.
      
Thus, tiny redusomes progressively decrease in size; it is from here their name originates.
      
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A new species under a new genus of the stbfamily Derogenetinae is described. The cirrus pouch is present and envelopes the upper portion of the curved seminal vesicle and the whole mass of prostate glands. The ventral sucker is situated in the posterior part of the ,body. The vitellaria are in a single and compact mass, located at the posterior extremity, and the eggs are provided with two long filaments at one pole. For the new genus and new species the name Chenia cheni is proposed.

本文把Derogenetinae亚科中之一新属及新种作一详细叙述。其主要特徵为(1)有阴茎囊包被貯精囊之上端及攝護腺之全部,(2)腹吸盤在体之中部稍近下方,(3)单块卵黄腺在体之最末端,(4)在无卵蓋之一端具两條细长丝状体。擬名陈氏半尾吸蟲(Chenia cheni)为本亚科中之一新属及新种。

The examination of shrimps for trematodes has been carried on, but interruptedly, since 1950, and, in addition to the three reported species, Coitocaecum sp., Phyllodistomum lesteri (Wu, 1938)and Microphallus minus (Wu, 1938; Yeh and Wu, 1950), another new trematode was discovered in the ovary of the freshwater shrimps of Shanghai. Through careful morphological studies with both living and stained specimens, it was found that the present trematode is an unencysted metacercaria of the Genus Genarchopsis Ozaki,...

The examination of shrimps for trematodes has been carried on, but interruptedly, since 1950, and, in addition to the three reported species, Coitocaecum sp., Phyllodistomum lesteri (Wu, 1938)and Microphallus minus (Wu, 1938; Yeh and Wu, 1950), another new trematode was discovered in the ovary of the freshwater shrimps of Shanghai. Through careful morphological studies with both living and stained specimens, it was found that the present trematode is an unencysted metacercaria of the Genus Genarchopsis Ozaki, 1925. It shows profound progenesis with its internal structures, especially the fully developed reproductive system. Furthermore, the degree of progenesis is so marked that the worm is filled with light brownish eggs. This makes the third case of the progenetic phenomenon of the fourth trematode larvae parasitic to the freshwater shrimps, Macrobrachium nipponensis (de Haan), obtained from Shanghai.In comparing the morphological characteristics of the present species with those ofother Genarchopsis, i. e., G. goppo Ozaki, 1925, G. anguillae Yamaguti, 1938, and G. chinensis Tang, 1950, it was also discovered that the present species, with the presence of the seminal receptacle and difference in structure of both intestinal caecum and excretory bladder is by no means a duplicate of any of the above stated species. A new name, Genarchopsis shanghaiensis is, therefore, proposed.

本文把上海沼蝦的Genarchopsis shanghaiensis n.sp.作一描述,并与Genarchopsis goppo,Genarchopsis anguillae和Genarchopsis chinensis互予比较。新种主要的特徵:(1)具有受精囊;(2)卵有1长丝;(3)排泄管较长,而在腹吸盤前缘分枝;(4)腸支短,而在腹吸盤前缘合併;(6)睾丸左右相对并列。另外对本蟲早熟现象提出问题,加以讨论。

Plasticizing agent is an organic surface-active admixture for cement mortar and concrete. It may be introduced also as an "addition" to the clinker during the grinding process in the manufacture of plasticizing Portland cement. In the USSR, the plasticizing agent under the name of "has been extensively and successfully used in construction works.The plasticizing agent is prepared by chemical treatment of the waste from the alcoholic fermentation of sulfite liquor in pulp manufacture. It contains calcium...

Plasticizing agent is an organic surface-active admixture for cement mortar and concrete. It may be introduced also as an "addition" to the clinker during the grinding process in the manufacture of plasticizing Portland cement. In the USSR, the plasticizing agent under the name of "has been extensively and successfully used in construction works.The plasticizing agent is prepared by chemical treatment of the waste from the alcoholic fermentation of sulfite liquor in pulp manufacture. It contains calcium lignin sulphonate as an effective component and thus possesses hydrophilic property. Due to the adsorption of the agent, a colloidal layer is formed on the surface of the cement particle; hence the effective dispersion and the increase of lubricity between the particles.Following the Soviet experience of CCB, the Materials-Testing and Research Laboratory of Shanghai Civil Engineering Bureau successfully experimented with the preparation of thermal polymer of the plasticizing agent, and a series of tests on the characteristics of the agent were made. This paper attempts to describe the method of preparation and the main properties of the agent.The addition of the agent in an amount of 0.1—0.2% of cement (dry weight) markedly improves the workability and the texture of the mortar and concrete mixtures. It reduces the water requirement and the cement content. It improves the impermeability and durability of the hardened mortar and concrete.The agent has a retarding effect on the setting of cement. It lowers the early strength of mortar and concrete, while the strength of later age is higher than those without admixtures. The use of CaCl_2 accelerator in 0.5—1% of cement by weight speeds up the rate of development of the early strength.The proper dosage of the agent depends upon the properties of cement. Therefore, certain tests should be made with the specified cement and aggregates on the job before the adoption of the agent.

本文介紹亞硫酸鹽酒精液滓塑化劑實驗室中的試製以及對於水泥膠砂及混凝土技術性能方面的作用。首先說明一些塑化劑的理論及亞硫酸鹽酒精液滓的技術規格,再簡要的介紹上海市政工程局材料試驗研究所試驗研究的經過和結果;最后综合蘇聯對於塑化劑和塑化水泥使用的先進經驗。塑化剂是一種有機的表面活動性物質,利用造紙工業发液進行酒精發酵所得的液滓。加入微量的塑化劑——約為水泥重量的0.1—0.25%,可以顯著的改善膠砂和混凝土的性質。在增加流動性、改善和易性和提高耐久性方面,有十分的效用,尤其是對節約水泥用量有极大的意義。祖國的建设事業正迫切需要這類新型的建築材料,因此提供一些试驗研究結果,以供国家主管機關和科技工作同志們深入研究和推廣使用時的參考。

 
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