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The following principle is well-known in Harmonic Analysis: If a real function has a spectral gap at the origin then it must have many sign changes.
      
The study shows that government has made some important changes after the signing of WTO agreement in 1994, but there are still some contentious issues that require attention.
      
The series of vasicine (1) analogues, an alkaloid from Adhatoda vasica Nees., were synthesized with changes in A, B or C rings.
      
Roridin P and Isororidin P induced morphological changes in Pyricularia oryzae, with a minimum concentration (MMCC) value of 6.2 ± 1.1?μmol/L and 7.9 ± 1.5?μmol/L.
      
Based on the literature [1], this paper changes the essential conditionα ∫g(t)/tr(s)ds ≤ 1 into∫g(t)/tr(s)ds ≤θ.
      
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Adult albino mice were starved for 66 to 120 hours and the liver was examined forphosphatases, glycogen and ribonucleic acid. Alkaline phosphatase was found to increasemoderately while acid phosphatase showed no significant change. Both glycogen andribonucleic acid disappeared completely. The periphery of the hepatic lobule often stainedmore deeply than the centre due mainly to the conspicuous staining of the cell borderand of the Kupffer cells. The duration of starvation had no infiuence on the amountof...

Adult albino mice were starved for 66 to 120 hours and the liver was examined forphosphatases, glycogen and ribonucleic acid. Alkaline phosphatase was found to increasemoderately while acid phosphatase showed no significant change. Both glycogen andribonucleic acid disappeared completely. The periphery of the hepatic lobule often stainedmore deeply than the centre due mainly to the conspicuous staining of the cell borderand of the Kupffer cells. The duration of starvation had no infiuence on the amountof both alkaline and acid phosphatases. In the refeeding experiment, mice starved for 48 to 72 hours were refed and werekilled 11 to 72 hours after subjecting to normal diet. The liver cells contained even greateramount of glycogen than in control animals. The restoration of ribonucleic acid was onlypartial. Both alkaline and acid phosphatases showed variable activities in the refeedingliver. The liver cells usually swelled and became rarefied, the sinusoids were very in-conspicuous. The swelling and rarefation of liver cells were caused by the accumulationof glycogen during refeeding. Three days refeeding did not bring this histological pictureto that of the control liver.

1.本实验系用年幼的小白鼠绝食66至120小时,及重喂11小时至3日, 观察肝脏内硷性及酸性磷酸酶、核糖核酸及糖元的改变。结果绝食的肝脏内糖元及核糖核酸完全消失;硷性磷酸酶中等量增加;酸性磷酸酶无变化。重喂的肝脏内糖元比对照标本更多,核糖核酸未完全恢复,硷性及酸性磷酸酶变化不一致。 2.绝食 66小时以上肝细胞内硷性及酸性磷酸酶含量并不随绝食时间延长而增多。 3.重喂的肝细胞膨大,细胞质稀薄中空,血窦狭窄。这种改变在重喂11小时後即已出现,连喂3日并无恢复的迹象。中空的原因是由於糖元增多所致。

Pacinian corpuscles from cat mesentery were fixed in Carnoy's fixative, paraffinsectioned and stained in Feulgen reagent and methyl green-pyronin. Controlled sectionswere hydrolyzed in 20% perchloric acid at 70℃ and 10% perchloric acid at 1-4℃. Itwas found that the so-called nuclei in the lamellae were Feulgen positive and stainedbluish purple after the methyl green-pyronin method. They disappeared after perchloric acidhydrolysis in 70℃ and showed no change after cold treatment. Their histochemicalreactions,...

Pacinian corpuscles from cat mesentery were fixed in Carnoy's fixative, paraffinsectioned and stained in Feulgen reagent and methyl green-pyronin. Controlled sectionswere hydrolyzed in 20% perchloric acid at 70℃ and 10% perchloric acid at 1-4℃. Itwas found that the so-called nuclei in the lamellae were Feulgen positive and stainedbluish purple after the methyl green-pyronin method. They disappeared after perchloric acidhydrolysis in 70℃ and showed no change after cold treatment. Their histochemicalreactions, stainability and detailed structures were similar to the nuclei of the connectivecells next to the corpuscle. It was therefore concluded the nuclear like bodies in the Paciniancorpuscles studied were true nuclei as mentioned in histological textbooks and not merely thecondensation of fibrils as W. Schwarz recently claimed after electron microscopic observation.These nuclei were located in between the fibrils of the lamellae.

1.用母猫肠系膜内的环层小体,Carnoy固定液固定,石蜡包埋,切成10微米。 2.用Feulgen染色,板层内的细胞核有阳性反应,用甲绿——哌啷咛染色,核呈蓝紫色,且均与附近的成纤维细胞核有相同的构造。 3.用过氯酸在70℃下水解3小时後再用上法染色,就不再见有这些核的出现,而用过氯酸在冰箱中(1.5—2℃)过夜,核的颜色和构造都与对照片同。 4.用蒸馏水代替过氯酸在70℃或1.5—2℃同样处理後染色也和对照片同。 5.由以上的结果,我们认为环层小体的板层内有核的存在。根据我们的观察核在环层本身的两层膜内。

Sham feeding was performed on esophageal fistula dogs with normal mixed food. The change of blood sugar concentration was followed for 3 hours as an indication of insulin secretion. The results were as follows: (1) After 10-15 minutes of sham feeding, the blood sugar showed marked fluctuations in most of the experiments and a slight decrease in some of the experiments as compared with that in the control experiments without sham feeding. (2) After inactivation of the adrenal medulla(removal of right adrenal...

Sham feeding was performed on esophageal fistula dogs with normal mixed food. The change of blood sugar concentration was followed for 3 hours as an indication of insulin secretion. The results were as follows: (1) After 10-15 minutes of sham feeding, the blood sugar showed marked fluctuations in most of the experiments and a slight decrease in some of the experiments as compared with that in the control experiments without sham feeding. (2) After inactivation of the adrenal medulla(removal of right adrenal and denervation of left adrenal), a marked fall of blood sugar was observed after sham feeding. The lowered blood sugar level maintained for about 2 hours and then returned to normal gradually. (3) The effect in(2) was abolished after injection of hyoscyamine, an atropinelike drug, or by subdiaphragmatic vagotomy. (4) Further observations were made on dogs with denervated pancreas after the inactivation of the adrenal medulla. No fall of blood sugar was also observed after sham feeding. Thus, the fall of blood sugar elicited by sham feeding was produced reflexly through the vago-insulin system. (5) These observations provided a further evidence for the nervous control of insulin secretion and gave rise to a favourable means for studying the significance of the vago-insulin system under natural conditions. We wish to express our gratitude to Comrade for bis valuable advice and to Prof. T. C. Shen for his constant encouragement throughout this work.

本工作用具有食道瘻的狗,用正常混合食物進行假飼,觀察血糖濃度在三小時內的變動,作為胰島素分泌的指標,結果如下: (一)正常假飼後,血糖濃度與不進行假飼的對照實驗比較,呈顯著的波動,有的血糖水平呈降低現象。 (二)取消腎上腺髓質作用後,再進行假飼,血糖濃度呈顯著的下降,並持續約兩小時左右,以後才逐漸恢復,說明取消腎上腺髓質作用後,假飼可引起顯著的血糖降低。 (三)用取消腎上腺體質作用的狗,再應用阿托平類藥物,或切斷其膈下迷走神經後,進行假飼,則不再有血糖降低,這說明引起血糖下降是通過迷走神經的。 (四)當切斷胰腺的一切外來神經後,再將取消了腎上腺髓質的狗進行假飼,血糖水平也不再下降,說明假飼所引起的血糖下降是由於反射性地通過迷走神經,興奮胰島裝置釋放胰島素對機體作用的結果。 (五)這項結果可作為神經因素影響胰島裝置的一個確切的證據,並對於闡明在自然條件下迷走神經—胰島素系統的重要意義,提供了有利的條件。

 
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