Acta pharmaceutica Nordica最新文献

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Investigation of the applicability of a tensile testing machine for measuring mucoadhesive strength. 粘接强度拉伸试验机的适用性研究。
Acta pharmaceutica Nordica Pub Date : 1992-01-01
K Dyvik, C Graffner
{"title":"Investigation of the applicability of a tensile testing machine for measuring mucoadhesive strength.","authors":"K Dyvik,&nbsp;C Graffner","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The applicability of a tensile testing machine (M30K, JJ Lloyd Instruments Ltd, GB) is investigated for measuring mucoadhesive strengths. A sample of an aqueous dispersion of a polymer with expected mucoadhesive properties is placed between two homemade discs of polyoxymethylene. The upper disc is mounted on a movable part of the machine while the lower disc is fixed on the stationary frame. A tensile force is submitted and the maximum detachment force at fracture and the adhesion work are estimated from the force displacement curve recorded. In some experiments, native mucous tissue of the large intestine of pigs was glued to the upper disc. Four polymers polycarbophil (Carbopol EX-55), carboxypolymethylene (Carbopol 934P), hydroxypropylmethylcellulose (Methocel K4M), and sodium alginate, are used in five different concentrations. At least three measurements are made of each polymer and concentration. Viscosity and osmolality are determined. By standardizing the time of sample equilibration and the run rate before measurement, it is possible to get good reproducibility of the tensile values. Based on the maximum nominal breaking force and the work consumed, it is concluded that the tensile strength is dependent both on the concentration and the type of polymer. The conclusions are the same independent of whether mucous pig tissue is used, or not. The same rank order in adhesive properties of the polymers is achieved as from using modified surface tensiometers.</p>","PeriodicalId":7082,"journal":{"name":"Acta pharmaceutica Nordica","volume":"4 2","pages":"79-84"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12560681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Model systems in iontophoresis--transport efficacy. 离子导入-运输效能的模型系统。
Acta pharmaceutica Nordica Pub Date : 1992-01-01
B H Sage
{"title":"Model systems in iontophoresis--transport efficacy.","authors":"B H Sage","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":7082,"journal":{"name":"Acta pharmaceutica Nordica","volume":"4 2","pages":"123"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12553954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Topical administration of drugs. 局部用药。
Acta pharmaceutica Nordica Pub Date : 1992-01-01
L Juhlin
{"title":"Topical administration of drugs.","authors":"L Juhlin","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":7082,"journal":{"name":"Acta pharmaceutica Nordica","volume":"4 2","pages":"113"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12560659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Basic principles of transport from topical preparations. 外用制剂运输的基本原则。
Acta pharmaceutica Nordica Pub Date : 1992-01-01
L O Sundelöf
{"title":"Basic principles of transport from topical preparations.","authors":"L O Sundelöf","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":7082,"journal":{"name":"Acta pharmaceutica Nordica","volume":"4 2","pages":"114"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12560661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Skin barrier function and the mechanism(s) of percutaneous penetration. 皮肤屏障功能及经皮渗透机制。
Acta pharmaceutica Nordica Pub Date : 1992-01-01
R H Guy, R O Potts, M L Francoeur
{"title":"Skin barrier function and the mechanism(s) of percutaneous penetration.","authors":"R H Guy,&nbsp;R O Potts,&nbsp;M L Francoeur","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":7082,"journal":{"name":"Acta pharmaceutica Nordica","volume":"4 2","pages":"115"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12560662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
How to optimize drug penetration through the skin. 如何优化药物通过皮肤的渗透。
Acta pharmaceutica Nordica Pub Date : 1992-01-01
B C Lippold
{"title":"How to optimize drug penetration through the skin.","authors":"B C Lippold","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":7082,"journal":{"name":"Acta pharmaceutica Nordica","volume":"4 2","pages":"117-8"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12560666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cutaneous adverse reactions to transdermal delivery systems--mechanisms and prevention. 经皮给药系统的皮肤不良反应——机制和预防。
Acta pharmaceutica Nordica Pub Date : 1992-01-01
H Maibach
{"title":"Cutaneous adverse reactions to transdermal delivery systems--mechanisms and prevention.","authors":"H Maibach","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":7082,"journal":{"name":"Acta pharmaceutica Nordica","volume":"4 2","pages":"125"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12560675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diagnostic tests of contact sensitivity. 接触敏感性诊断试验。
Acta pharmaceutica Nordica Pub Date : 1992-01-01
T Fischer
{"title":"Diagnostic tests of contact sensitivity.","authors":"T Fischer","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":7082,"journal":{"name":"Acta pharmaceutica Nordica","volume":"4 2","pages":"126"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12560676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of terminal heat sterilization on the stability of phospholipid-stabilized submicron emulsions. 末梢热灭菌对磷脂稳定亚微米乳剂稳定性的影响。
Acta pharmaceutica Nordica Pub Date : 1992-01-01
P R Chaturvedi, N M Patel, S A Lodhi
{"title":"Effect of terminal heat sterilization on the stability of phospholipid-stabilized submicron emulsions.","authors":"P R Chaturvedi,&nbsp;N M Patel,&nbsp;S A Lodhi","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Parenteral emulsions similar in composition to the commercially available fat emulsions were prepared using a Microfluidizer. The relationship of pH and terminal heat sterilization by autoclaving on the stability of phospholipid-stabilized emulsions was evaluated. The stability of these formulations was determined by using droplet size and zeta potential measurements. It was found that the zeta potentials of emulsions stabilized by more purified phospholipid were lower in magnitude compared to those stabilized by less purified phospholipid. Furthermore, acidic emulsions (between pH 5.0 and 7.0) showed an increased droplet size upon autoclaving, whereas the emulsions adjusted to an alkaline pH (pH 8.0 to 10.0) did not show a significant change in their droplet sizes upon autoclaving. The zeta potentials of all the emulsions \"increased\" (in magnitude) upon autoclaving and achieved values between -40 and -50 mV. The results of our studies could be explained on the basis of hydrolysis of phosphatidylcholine at different pH values, leading to a breakdown of the film surrounding the oil droplet, which results in coalescence and/or cracking of the emulsions.</p>","PeriodicalId":7082,"journal":{"name":"Acta pharmaceutica Nordica","volume":"4 1","pages":"51-5"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12683774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Increase in thebaine content of Papaver bracteatum Lindl. after colchicine treatment of seeds. Annual fluctuations in thebaine level of individual plants. 小苞罂粟碱含量的增加。秋水仙碱处理后的种子。单个植物的碱水平的年波动。
Acta pharmaceutica Nordica Pub Date : 1992-01-01
J K Wold, B S Paulsen, T Haugli, A Nordal, M M Laane
{"title":"Increase in thebaine content of Papaver bracteatum Lindl. after colchicine treatment of seeds. Annual fluctuations in thebaine level of individual plants.","authors":"J K Wold,&nbsp;B S Paulsen,&nbsp;T Haugli,&nbsp;A Nordal,&nbsp;M M Laane","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>From colchicine-treated seeds of Papaver bracteatum Lindl. some poppy plants were obtained that developed capsules richer in thebaine than the controls. The individual poppies were analyzed for capsule thebaine content annually for eight successive years, the results revealing significant year-to-year differences. One of the poppies, X7, (ca 5% thebaine) developed capsules consisting partly of polyploid tissue during the first and second year. This plant was propagated vegetatively to give a series (the X7 series) of new P. bracteatum plants. The capsule thebaine content of these individuals differed markedly the first two years, whereupon the alkaloid production decreased and appeared to level out and reach a value still clearly higher than the controls (mean values 2.3% and 1.3%, respectively). From seeds of four of the thebaine-rich poppies of the X7 series, four new series of P. bracteatum plants were obtained. The capsule thebaine level of these was significantly lower than that of the mother plants.</p>","PeriodicalId":7082,"journal":{"name":"Acta pharmaceutica Nordica","volume":"4 1","pages":"31-4"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12683878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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