Habara, Y; Kanno, T
1. The effects of chlorobutanol, a widely used drug preservative, on exocrine response and intracellular Ca2+ dynamics were examined in isolated pancreatic acini of the rat. 2. Chlorobutanol (1 mg ml-1) markedly inhibited the secretory response to cholecystokinin octapeptide (CCK-8), carbamylcholine chloride (carbachol), or sodium fluoride, a direct G-protein activator. However, chlorobutanol itself induced a maximal release of amylase when the dose was increased to 4 mg ml-1. 3. An oscillatory fluctuation of cytoplasmic Ca2+ concentration, [Ca2+]c, induced by 5 pM CCK-8 or 0.3 microM carbachol was totally abolished in the presence of 1 mg ml-1 chlorobutanol. 4. A biphasic change in [Ca2+]c induced by 100 pM CCK-8, a rapid rise followed by a gradual decay, was transformed to an oscillatory fluctuation by the preservative. 5. Chlorobutanol inhibited 13 pM [125I]-CCK-8 or 0.5 nM [3H]-methylscopolamine chloride binding to the acinar cells in a dose-dependent manner. 6. These results indicate that chlorobutanol produces discernible pharmacological effects on the secretory response in rat pancreatic acinar cells through changes in the Ca2+ dynamics. Possible sites of action could be at a binding process of secretagogues to their receptors, at an activation process of a G-protein located in the plasma membrane, or at the processes following G-protein activation. However, the possibility that the preservative may distort the Ca(2+)-transport function of the plasma membrane or the membrane of intracellular organella, especially Ca(2+)-sequestering pools, cannot be excluded. PMID:7689400
刘茜; 马强; 席海为; 王烨; 白桦; 王超
建立了测定化妆品中三氯叔丁醇的气相色谱-质谱分析方法.膏霜、水剂、散粉、香波、唇膏等不同类型的化妆品样品加入50％甲醇-无水乙醇或无水乙醇超声提取后,样品提取液高速离心处理,取上清液经无水硫酸钠脱水,进行气相色谱-质谱定性及定量分析.选用DB-1701(30 m×0.25 mm×0.25μm)石英毛细管柱,程序升温,流速1.0 mL/min,采用电子轰击电离源,选择监测离子(m/z 53、59、125,其中59为定量离子),外标法定量.方法的平均回收率为83.4％～107.6％,相时标准偏差(RSD)为1.0％ ～5.3％,膏霜、水剂、散粉、香波、唇膏等不同类型化妆品中二氯叔丁醇的检出限均为0.8 mg/kg.%A gas chromatography-mass spectrometric method was developed for the determination of chlorobutanol in cosmetic samples. Hie cream, lotion, powder, shampoo and lipstick samples were ultrasonically extracted with 50% methanol-ethanol or ethanol, and then centrifuged. The eluent was further dehydrated and then analyzed with a capillary column ( DB-1701, 30 m × 0.25 mm × 0.25 jjun) under electron ionization conditions at a flow rate of 1. 0 mL/min. The quantitation was performed by the external standard method under selected ion monitoring mode (SIM) using monitoring ions of m/z 53, 59, 125. The recoveries were 83. 4% ～ 107.6% , with the relative standard deviations (RSDs) of 1.0% ～5. 3%. All the detection limit of cream, lotion, powder, shampoo and lipstick samples was 0. 8 mg/kg. This method was proved to be simple, accurate, and stable by testing experiments, which was suitable for the detection of chlorobutanol in cosmetics.
Full Text Available Background and Purpose. Dry socket syndrome is one of the most irritating complications after tooth extraction. This study aims to investigate the efficacy of pastille GECB compared to ZOE. Materials and Methods. 30 patients with dry socket syndrome were selected and divided into two groups. GECB pastille was produced with 3% Guaiacol, 3% Eugenol 1.6% Chlorobutanol, sized 3×7×10 mm. GECB was applied in one group, and ZOE was used for the other group. Duration of pain after treatment and painkiller intake values were recorded within 20 days. The data were analyzed with independent samples t-test, Mann-Whitney, and Chi-Square tests. Results. Pain persisted for 45.53±33.34 minutes in patients treated with ZOE and 19.87±21.80 minutes in those treated with GECB (=0.19. Patients in the ZOE group reported more painkiller intake within 20 days (=0.031. Conclusion. GECB showed more significant efficacy in reducing complications after tooth extraction.
The paper deals with some studies carried out to evaluate the feasibility of radiation sterilization or treatment of some medical products and pharmaceuticals of immediate importance to their respective industries. The products include penicillin G sodium, ampicillin sodium, tetracyclin hydrochloride ointment,hydrocortisone acetate and its ointment, aqueous sodium chloride solutions (0.9 and 20%), fluorescein sodium strips, urea, ethylmorphine hydrochloride, aqueous solution of chlorobutanol and one of its commercial preparations, phenylmercuric nitrate and its aqueous solutions, aqueous solutions of methyl and propyl paraben, lactose, gum karaya, absorbent cotton and poly-(vinyl chloride) based medical products. The irradiated products have been examined for pharmacopoeial specifications wherever available. In general the products have been examined for changes in colour, pH, ultra-violet and infra-red absorption spectra. Thin-layer chromatographic analyses have been carried out to establish the purity of some of the irradiated products. The feasibility or otherwise of radiation sterilization or treatment of the various products from the physicochemical and microbiological (pharmacological) clinical considerations is also described. (author)