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Ice Crystals and Glassy Water in Frozen Polymer Gels 冷冻聚合物凝胶中的冰晶和玻璃水
Netsu Sokutei Pub Date : 2004-03-30 DOI: 10.11311/JSCTA1974.31.87
N. Murase
{"title":"Ice Crystals and Glassy Water in Frozen Polymer Gels","authors":"N. Murase","doi":"10.11311/JSCTA1974.31.87","DOIUrl":"https://doi.org/10.11311/JSCTA1974.31.87","url":null,"abstract":"To understand the mechanism of ice crystallization during rewarming observed with a frozen crosslinked dextran gel of a certain density of crosslink, DSC, Raman scattering and X ray diffraction-DSC simultaneous measurements were conducted. It was found, as a result, that size of ice crystals as well as freezing behavior depend on the density of crosslink of the gels. By the study of two-dimensional X ray diffraction-DSC simultaneous measurements, formation of small ice crystals was indicated with the gel where ice crystallization during rewarming is observed. Presence of glassy water was also indicated in the frozen state of the gel by the measurement of Raman scattering. Then, it was clarified that ice crystallization in polymer gels is more or less obstructed by the polymer network, and by its change at the time of freezing. From these results together with the knowledge so far obtained, a conceivable mechanism of ice crystallization during rewarming was discussed.","PeriodicalId":19096,"journal":{"name":"Netsu Sokutei","volume":"13 1","pages":"87-92"},"PeriodicalIF":0.0,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80256701","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
Application of Isothermal Microcalorimetry for Stability Evaluation of Solid Dosage Form 等温微热法在固体剂型稳定性评价中的应用
Netsu Sokutei Pub Date : 2004-03-30 DOI: 10.11311/JSCTA1974.31.80
Y. Yoshihashi, E. Yonemochi, K. Terada
{"title":"Application of Isothermal Microcalorimetry for Stability Evaluation of Solid Dosage Form","authors":"Y. Yoshihashi, E. Yonemochi, K. Terada","doi":"10.11311/JSCTA1974.31.80","DOIUrl":"https://doi.org/10.11311/JSCTA1974.31.80","url":null,"abstract":"","PeriodicalId":19096,"journal":{"name":"Netsu Sokutei","volume":"19 1","pages":"80-86"},"PeriodicalIF":0.0,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84445808","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: 1
Investigation of the structural Relaxation Process of Amorphous Formulation by Isothermal Microcalorimetry 用等温微热法研究非晶配方的结构弛豫过程
Netsu Sokutei Pub Date : 2004-03-30 DOI: 10.11311/JSCTA1974.31.74
K. Kawakami
{"title":"Investigation of the structural Relaxation Process of Amorphous Formulation by Isothermal Microcalorimetry","authors":"K. Kawakami","doi":"10.11311/JSCTA1974.31.74","DOIUrl":"https://doi.org/10.11311/JSCTA1974.31.74","url":null,"abstract":"","PeriodicalId":19096,"journal":{"name":"Netsu Sokutei","volume":"85 1","pages":"74-79"},"PeriodicalIF":0.0,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87107016","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: 5
Evaluation of Molecular State of Medicines by Differential Scanning Calorimetry 差示扫描量热法评价药物分子状态
Netsu Sokutei Pub Date : 2004-03-30 DOI: 10.11311/JSCTA1974.31.69
Y. Tozuka, Keiji. Yamamoto
{"title":"Evaluation of Molecular State of Medicines by Differential Scanning Calorimetry","authors":"Y. Tozuka, Keiji. Yamamoto","doi":"10.11311/JSCTA1974.31.69","DOIUrl":"https://doi.org/10.11311/JSCTA1974.31.69","url":null,"abstract":"This review describes the evaluation of molecular state of medicines by using differential scanning calorimetry (DSC). Thermal behavior of amorphous clarithromycin obtained by grinding and spray drying were evaluated. In DSC curves, both broad and sharp peaks for crystallization were observed in 30min ground sample, whereas spray-dried sample showed one broad peak for crystallization. In order to study the physicochemical stability of amorphous cefditoren pivoxil, glass transition accompanying enthalpy relaxation was evaluated for the ground and spray-dried samples by means of modulated-temperature DSC. Glass transition temperature (Tg) and relaxation enthalpy of the ground sample of cefditoren pivoxil were changed by storage for definite intervals at a temperature below Tg, while those of the spray-dried sample indicated an almost constant value by storage. These results suggest that the ground sample was less stable than the spray dried sample. The ground sample might be stabilized by storage below Tg. Thermal behavior of salicylamide in the mixtures with Folded Sheets Mesoporous Materials (FSM)-16 was investigated by DSC. Three kinds of molecular states of salicylamide, i.e., crystalline state, disordered crystalline state for which a broad endothermic peak was observed at a lower temperature, and amorphous state for which no peak on the DSC curves could be observed.","PeriodicalId":19096,"journal":{"name":"Netsu Sokutei","volume":"108 1","pages":"69-73"},"PeriodicalIF":0.0,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75718465","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
Excess Enthalpies of Some Nitrile Compounds + Methyl Methylthiomethyl Sulfoxide or + Dimethyl Sulfoxide at 298.15K 298.15K时某些丁腈化合物+甲基甲硫甲基亚砜或+二甲基亚砜的超焓
Netsu Sokutei Pub Date : 2004-03-30 DOI: 10.11311/JSCTA1974.31.62
T. Kimura, T. Matsushita, Kenzi Suzuki, S. Takagi
{"title":"Excess Enthalpies of Some Nitrile Compounds + Methyl Methylthiomethyl Sulfoxide or + Dimethyl Sulfoxide at 298.15K","authors":"T. Kimura, T. Matsushita, Kenzi Suzuki, S. Takagi","doi":"10.11311/JSCTA1974.31.62","DOIUrl":"https://doi.org/10.11311/JSCTA1974.31.62","url":null,"abstract":"","PeriodicalId":19096,"journal":{"name":"Netsu Sokutei","volume":"56 1","pages":"62-68"},"PeriodicalIF":0.0,"publicationDate":"2004-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76020315","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: 1
Accelerated Mixing on a Microfluidic Device 微流控装置上的加速混合
Netsu Sokutei Pub Date : 2004-01-25 DOI: 10.11311/JSCTA1974.31.38
T. Fujii
{"title":"Accelerated Mixing on a Microfluidic Device","authors":"T. Fujii","doi":"10.11311/JSCTA1974.31.38","DOIUrl":"https://doi.org/10.11311/JSCTA1974.31.38","url":null,"abstract":"","PeriodicalId":19096,"journal":{"name":"Netsu Sokutei","volume":"51 1","pages":"38-38"},"PeriodicalIF":0.0,"publicationDate":"2004-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78279651","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
Water; Dynamics and Reactions 水;动力学与反应
Netsu Sokutei Pub Date : 2004-01-25 DOI: 10.11311/JSCTA1974.31.6
S. Saito, M. Matsumoto, I. Ohmine
{"title":"Water; Dynamics and Reactions","authors":"S. Saito, M. Matsumoto, I. Ohmine","doi":"10.11311/JSCTA1974.31.6","DOIUrl":"https://doi.org/10.11311/JSCTA1974.31.6","url":null,"abstract":"","PeriodicalId":19096,"journal":{"name":"Netsu Sokutei","volume":"174 1","pages":"6-13"},"PeriodicalIF":0.0,"publicationDate":"2004-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73357370","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: 1
Polyamorphism in Water and the Second Critical Point Hypothesis 水的多变性和第二临界点假说
Netsu Sokutei Pub Date : 2004-01-25 DOI: 10.11311/JSCTA1974.31.23
O. Mishima
{"title":"Polyamorphism in Water and the Second Critical Point Hypothesis","authors":"O. Mishima","doi":"10.11311/JSCTA1974.31.23","DOIUrl":"https://doi.org/10.11311/JSCTA1974.31.23","url":null,"abstract":"","PeriodicalId":19096,"journal":{"name":"Netsu Sokutei","volume":"4 1","pages":"23-28"},"PeriodicalIF":0.0,"publicationDate":"2004-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79371599","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: 2
The Structure and Properties of Supercritical Water 超临界水的结构与性质
Netsu Sokutei Pub Date : 2004-01-25 DOI: 10.11311/JSCTA1974.31.14
M. Nakahara
{"title":"The Structure and Properties of Supercritical Water","authors":"M. Nakahara","doi":"10.11311/JSCTA1974.31.14","DOIUrl":"https://doi.org/10.11311/JSCTA1974.31.14","url":null,"abstract":"@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@ @?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@? @@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@? @?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@?@?e@?@? @?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@?@?@@@?@? @?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@?@?f@? @@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?@@@@@@@?","PeriodicalId":19096,"journal":{"name":"Netsu Sokutei","volume":"4 1","pages":"14-22"},"PeriodicalIF":0.0,"publicationDate":"2004-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90259666","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: 1
Quantitative Differential Thermal Analysis of Dehydration of Brucite under High Pressure 水镁石高压脱水的定量差热分析
Netsu Sokutei Pub Date : 2004-01-25 DOI: 10.11311/JSCTA1974.31.2
H. Fukui, T. Katsura, O. Ohtaka
{"title":"Quantitative Differential Thermal Analysis of Dehydration of Brucite under High Pressure","authors":"H. Fukui, T. Katsura, O. Ohtaka","doi":"10.11311/JSCTA1974.31.2","DOIUrl":"https://doi.org/10.11311/JSCTA1974.31.2","url":null,"abstract":"近年数万気圧 という高圧条件下において, 鉱物の融体 を 含む液相の構造 についての実験的研究がX線 を用いて盛ん に行われている。それ らは主に回折や吸収スペ ク トルによ るもので, 近距離 (~3A) もしくは中距離 (~6A) の構 造が高圧下 にお いて変化 する ことが明 らかになって きた。 この ような局所構造に対す る理解が深まる一方で, 熱力学 的 な理解すなわちエ ン トロピーやエ ンタルピーの測定 はあ ま り行 われていない。例 えば, 高圧下における融解熱 や脱 水熱は重要な物性値である。 これらを得 るためには高圧下 での定量的熱分析が必要 となるが, これまで数万気圧 とい う圧力条件下でい くつかの試みは行われた ものの,1-3)さま ざまな困難のために実用 的な方法論 はまだない とい うのが 現状である。 というの も, 数万気圧 を超える圧力条件を達 成 できる ような環境 において, 第一次的に熱量を測定で き る断熱法や電力補償 ヒーターを用 いた示差走査熱測定法 を 行 うことはほとん ど不可能に近い。 また通常用 いられてい るような金属の融解熱 を高圧下でも基準 として用いように も, 金属液体の圧縮率や熱膨張率 などは測 られていたとし ても1気 圧での値のみであるため, 高圧下でのエンタルピ ーを計算することができない。筆者 らは, 高圧力下におけ","PeriodicalId":19096,"journal":{"name":"Netsu Sokutei","volume":"94 1","pages":"2-5"},"PeriodicalIF":0.0,"publicationDate":"2004-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84325832","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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