Hi this thesis, the setting time of various retarders had been tested, in which three retarders with good retarding action, citric acid, sodium tripolyphosphate, bone glue are respectively chosen from three types of retarders, hydroxyl carboxylic acid type, phosphate type and protein type, and the strength and setting time of gypsum added with them are determined. effect of some factors, such as ph value, fineness of hemihydrate, type of gypsum on the retarding action of the retarders is also studied
本文對多種緩凝劑進行凝結時間測試,選擇效果良好的羥
基羧酸、無機鹽和蛋白質類型的三種緩凝劑:檸檬酸、多聚磷酸鈉和骨膠,測定它們對石
膏凝結時間、強度等宏觀性能的影響,並分別研究ph值、石
膏細度和石
膏種類等因素對它們的緩凝效果的影響。
Through the analyzing the macro - structure to micro - structure, the author considers that retarding mechanism of citric acid is that citric acid and ca in the gypsum form the complexant ion, and hinder the crystallization center of dihydrate crystal bigger ; that of sodium tripolyphosphate is that it combined with ca, hinders the dissolve of hemihydrate. formation and growth of crystallization center ; that of bone glue is the glue - protection and chemical absorption action of active group, which also retards the formation and growth of crystallization center
通過宏觀到微觀的分析,筆者認為,檸檬酸的緩凝作用的原因主要在於檸檬酸與鈣形成絡合離子,影響了二水石
膏晶體的晶核長大過程;多聚磷酸鈉與鈣形成某種復鹽,對于石
膏晶體的溶解、成核和長大過程均有強烈的阻礙影響;骨膠則在於膠體對半水石
膏的包裹和活性
基團的化學吸附,使二水石
膏晶體的成核和長大困難。
Treatment with cream base and untreated volunteers served as controls
用乳
膏基質和未治療的志願者為對照。
One ear was treated with hirudoid cream, while the other ear was either left untreated or treated with the cream base only
一隻耳朵用喜療妥軟
膏治療,而另一隻耳朵則不治療或只用軟
膏基質治療。
When compared to the reference group, treated with cream base, a clear shortening of the mean thrombus length was seen after the administration of hirudoid
而與用軟
膏基質的對照組相比,應用喜療妥后平均血栓長度明顯縮短。
The size of the haematomas treated with hirudoid was reduced after 24 hours, while the haematomas which remained untreated or were treated with cream base required 24 - 36 hours to show a distinct improvement
血腫的大小在喜療妥組用藥24小時后即減小了,而未治療組或軟
膏基質組則需要24 36小時才有明顯的改善。
Standard specification for steel self - piercing tapping screws for the application of gypsum panel products or metal plaster bases to wood studs or steel studs
木銷或鋼銷上石
膏板製品或金屬熟石
膏基板用自攻鋼螺釘標準規范
Study on compounding and properties of gypsum - based building putty
石
膏基建築膩子的配製與性能研究
Methods adopting blockrandomized, open, positive western medicine and placebo parallel group controlled method, a total of 120 enrolled patients were administered orally with saoxuan pill, and randomized into three groups respectively treated with external application of cebo, daivonex, or vehicle control twice a day for 4 weeks. the changes of erythema, infiltration, scaly eruption, pruritus and the area of lesion were evaluated, the safety and the initiating time of symptom improvement itsi were observed as well
將120例入選患者在口服掃癬丸情況下,分別採用復方莪倍軟
膏達力士軟
膏軟
膏基質外塗治療4周,療程結束后評價紅斑浸潤鱗屑瘙癢的改善情況及皮損面積改變情況及安全性,並觀察癥狀改善時間。
Setting time of gypsum plaster is very short, usually only 6 ~ 30 min, and operation time is only 5 - 10 min, which cannot satisfy the practical plastering and construction of gypsum - based material
半水石
膏凝結硬化很快,其初終凝時間為6 30分鐘,可操作時間只有5 10分鐘,往往不能滿足石
膏基材料的成型與施工的需要。
The ointment bases, the different excipients and the varying properties of heparins are being discussed as possible reasons for the different effects of ointments containing heparin
而肝素軟
膏的作用差異很大,差異的原因可能是軟
膏基質、賦形劑和所含肝素濃度的不同。
Now, bpb mainly provide high - qualified plasterboard, mineral fiber tile and ceiling tile together with metal, joint tape, joint plaster, drywall screw, insulation glass wool and other accessorial tool
目前,公司可以為客戶提供優質紙面石
膏板礦棉天花板石
膏基吊頂板配以輕鋼骨接縫紙帶接縫石
膏粉干墻螺釘玻璃隔音棉輔助工具等完善的系列產品。
Gypsum based adhesives for gypsum blocks - definitions, requirements and test methods
石
膏塊材用石
膏基膠粘劑.定義要求和試驗方法
Gypsum based adhesives for gypsum blocks - definitions, requirements and test methods ; german version en 12860 : 2001 ac : 2002
石
膏塊材用石
膏基粘合劑.定義要求和試驗方法;德文
Gypsum based adhesives for thermal acoustic insulation composite panels and plasterboards - definitions, requirements and test methods ; german version en 14496 : 2005
隔熱隔音面板和灰泥板用石膏基膠粘劑.定義要求和試