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- isdn
相关语句
  相似匹配句对
     ISDN Anywhere?
     ISDN无处不在吗?
短句来源
     FROM N-ISDN TO B-ISDN
     从窄带ISDN到宽带ISDN
短句来源
     Connectionless Service in B-ISDN
     B-ISDN中的无连接业务
短句来源
     Introduction to ISDN Technology
     ISDN技术的发展
短句来源
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  - isdn
The Medium Access Control (MAC) aims at providing a simple and efficient transport for ATM cells from a Base Station (BS), interfaced with the ATM Broadband Integrated Service Digital Network (B-ISDN), to ATM Portable Stations (PSs) and vice versa.
      
This evolution is necessary for the survival of the CATV industry in an era of deregulation and of the development of the B-ISDN by the telecommunications companies.
      
This experiment provided a real system demonstration of satellite ATM for B-ISDN.
      
Then initial ATM based B-ISDN can be introduced by interconnections of these broadband islands.
      
The purpose of the project is to develop an experimental ATM satellite link for the future B-ISDN services, particularly for the interconnections of the ATM testbeds which are in the form of broadband islands developed in Europe.
      
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After administration of a tablet containing both sodium alginate and soluble calcium salts, an acid insoluble calcium alginate gel matrix can be formed immediately upon wetting with gastric fluid (Fig 1). The active ingredient contained therein is released gradually and a prolonged-action of the drug can be produced accordingly.Scanning electron micrographs were taken for better understanding the structure of the matrix (Fig2, Fig3). It was found that all the particle size of the sodium alginate powder, the...

After administration of a tablet containing both sodium alginate and soluble calcium salts, an acid insoluble calcium alginate gel matrix can be formed immediately upon wetting with gastric fluid (Fig 1). The active ingredient contained therein is released gradually and a prolonged-action of the drug can be produced accordingly.Scanning electron micrographs were taken for better understanding the structure of the matrix (Fig2, Fig3). It was found that all the particle size of the sodium alginate powder, the forms and quantities of calcium salts, the tabletting processes and the sizes of the dried granules to be compressed etc. affected the release rate markedly. Several drugs including isosorbide dinitrate, procainamide, phenytoin, chloropromazine, and theophylline were incorporated into the alginate formulations separately. The dissolution rates obtained revealed that sustained release effects were achieved to some degree by this type of tablets (Fig4).In considering the relative short half-life characterized by isosorbide dinitrate (ISDN), efforts were made to develop a satisfactory formulation with a suitable dissolution rate. A formulation with t_(30) about 50 min. was obtained by using fine powder of sodium alginate (120 mesh) and medium size granules.

海藻酸钠(NaAl)与可溶性钙盐同时存在干片剂中服后遇胃液即生成酸不溶性海藻酸钙(CaAl)的凝胶骨架,其中所含药物因缓释而具长效作用。用扫描电镜研究了这种骨架并发现NaAl粉末的细度、钙盐的形式及用量、制片工艺、颗粒大小等因素对释药速度均有明显影响。硝酸异山梨醇(ISDN)、普鲁卡因酰胺(P)、苯妥因(DPH)、茶碱(Th)、氯丙嗪(Ch)均可藉CaAl而获得不同程度的缓释作用。着重研究了ISDN长效片,结合到该药的消除速度常数,从工艺方面研究了释药速度t_(30)=50分钟的处方。

Isosorbide dinitrate (ISDN) is an effective and safe antianginal agent. The determination of ISDN in rabbit's plasma by gas-liquid chromatography was described.Quantitation was effected by 63Ni-eleotron capture detector after separation with a 3% QF-1 column. Calibration curves of the instrumental response against drug concentration were linear over the range 0.1-0.9 ng. The limit of detection of ISDN was considered to be 0.02 ng.Avoiding the transfer and evaporation of the organic phase, ISDN...

Isosorbide dinitrate (ISDN) is an effective and safe antianginal agent. The determination of ISDN in rabbit's plasma by gas-liquid chromatography was described.Quantitation was effected by 63Ni-eleotron capture detector after separation with a 3% QF-1 column. Calibration curves of the instrumental response against drug concentration were linear over the range 0.1-0.9 ng. The limit of detection of ISDN was considered to be 0.02 ng.Avoiding the transfer and evaporation of the organic phase, ISDN was extracted from plasma with 0.5 ml ethyl acetate by a one-stage process. The extraction was simple and rapidly performed. The recovery from plasma was higher and the mean value was 87.67%.According to the time course of mean plasma concentration data, the pharmaco-kinetic characteristic of ISDN was established to be a two-oompartnent open model. The pharmaookinetic parameters were calculated as follows: t1/2(β) =23.38 min, t1/2(α) =4.16 min, Ke=0.07613 min-1,K21 = 0.06490 min-1, K12 = 0.05531min-1.

硝酸异山梨醇酯(简称ISDN)是临床上常用的一种有效而安全的抗心绞痛药物。本文报道采用3%QF-1层析柱及~(63)Ni-ECD气液色谱法测定了家兔血浆中ISDN的浓度,线性范围为0.1~0.9ng,检测限为0.02ng;并采用了0.5ml醋酸乙酯对家兔血浆中ISDN进一步提取,直接取上清液进样,避免了有机层的转移和挥发。此法操作简化,回收率高,平均回收率为87.67%。根据血药浓度-时间曲线,确定了ISDN的药代动力学特性是符合药理学上的开放型二室模型,测得药代动力学参数为:t_(1/2(β))=23.38分,t_(1/2(α))=4.16分,K_0=0.07613分~(-1),K_(12)=0.06490分~(-1),K_(12)=0.05531分~(-1)。

According to the pathaphysiology and the circulatory nature of the development of heart falure, the drug administration may be diveded into 5stages, and drugs should be added in every stage. 1. Dyspnea during mod-est physical exercise: Isosorbide dinitrate(ISDN)should be administered toimprove exercise tolerance. 2. Paraxysmal noctural dyspnea and/or mildperiphery edema: Diuretic (dihydrochlorothiazide or spironolactone) are ta-ken intermittenly besides ISDN. 3. Dyspnea during mild physical exerciseand...

According to the pathaphysiology and the circulatory nature of the development of heart falure, the drug administration may be diveded into 5stages, and drugs should be added in every stage. 1. Dyspnea during mod-est physical exercise: Isosorbide dinitrate(ISDN)should be administered toimprove exercise tolerance. 2. Paraxysmal noctural dyspnea and/or mildperiphery edema: Diuretic (dihydrochlorothiazide or spironolactone) are ta-ken intermittenly besides ISDN. 3. Dyspnea during mild physical exerciseand marked periphery edema:Hydralazine is added to ISDN and diuretics inthis stage. 4. dyspnea at rest: Cardiac glycosides are added to the drugsused in the 3rd stage. 5. Reluctant heart failure:On the basis of the drugtherapy in the 4th stage, some of prednisore, adrerergic beta receptor ago-nists, new vasodilator agents and GIK are administered selectively.

依据心衰发展的病理生理及循环特征,药物治疗分五个阶段,依次追加药物。1、一般体力活动时有呼吸困难:服消心痛以提高运动耐量。2、夜间阵发性呼吸困难及/或轻度周围水肿:加利尿剂,间断服用。3、轻微活动时即有呼吸困难及明显周围水肿:追加肼苯达嗪。4、休息时仍呼吸困难:追加洋地黄。5、难治性心衰:酌情加用肾上腺皮质激素、β受体兴奋药、新的血管扩张剂及极化液等。

 
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