V. Kolodyaznaya, E. Kiprushkina, I. Shestopalova, Y. Broyko, O. Rumiantceva, A. I. Albulov, E. A. Rogozina
{"title":"CHANGES IN THE FATTY ACID COMPOSITION OF AVOCADO FRUIT TREATED WITH PREPARATIONS DURING STORAGE","authors":"V. Kolodyaznaya, E. Kiprushkina, I. Shestopalova, Y. Broyko, O. Rumiantceva, A. I. Albulov, E. A. Rogozina","doi":"10.15259/pcacd.24.006","DOIUrl":"https://doi.org/10.15259/pcacd.24.006","url":null,"abstract":"","PeriodicalId":44461,"journal":{"name":"Progress on Chemistry and Application of Chitin and its Derivatives","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44038989","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}
{"title":"RHEOLOGICAL AND MECHANICAL STUDIES OF CHITOSAN BLENDS WITH THE ADDITION OF AN IONIC LIQUID","authors":"K. Lewandowska, M. Szulc","doi":"10.15259/pcacd.24.010","DOIUrl":"https://doi.org/10.15259/pcacd.24.010","url":null,"abstract":"","PeriodicalId":44461,"journal":{"name":"Progress on Chemistry and Application of Chitin and its Derivatives","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43193685","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}
Y. Privar, E. Modin, S. Bratskaya, Donostia Cic nanoGUNE
Here, we report the fabrication of supermacroporous monolith sorbents for acidic dye removal via chitosan cross-linking with ethylene glycol diglycidyl ether (EGDGE) in acidic medium at sub-zero temperature. The developed porous structure with the thickness of polymer walls in the range of a few microns and a high content of primary amino groups determined the high sorption capacity of the sorbents toward Alizarin Red in a broad pH range (2–8). Due to the cross-linking via hydroxyl groups of the chitosan, the static sorption capacity of the fabricated materials was higher than that of chitosan flakes, even for sorbents cross-linked at EGDGE:NH 2 -chitosan with molar ratio 2:1. The monolith sorbents were mechanically stable and supported flow rates up to 300 bed volumes per hour. The breakthrough curve of Alizarin Red sorption showed that the effective dynamic sorption capacity was 283 mg/g, and 100% of the dye could be removed from the solutions with concentration of 100 mg/L. The monoliths can be regenerated with 0.3s M NaOH solution and used in several consecutive cycles of sorption/regeneration without loss of efficacy.
在这里，我们报道了在酸性介质中，在零下温度下，通过壳聚糖与乙二醇二缩水甘油醚（EGDGE）交联，制备用于酸性染料去除的超大孔单体吸附剂。聚合物壁厚度在几微米范围内的发达多孔结构和高含量的伯氨基决定了吸附剂在宽pH范围（2–8）内对茜素红的高吸附能力。由于壳聚糖的羟基交联，即使对于摩尔比为2:1的EGDGE:NH2-壳聚糖交联的吸附剂，所制备的材料的静态吸附能力也高于壳聚糖薄片。整料吸附剂是机械稳定的，并且支持高达每小时300床体积的流速。Alizarin红吸附的穿透曲线表明，有效动态吸附容量为283mg/g，浓度为100mg/L的溶液中染料的去除率为100%。整料可以用0.3s M NaOH溶液再生，并用于几个连续的吸附/再生循环，而不会失去效力。
{"title":"REMOVAL OF ALIZARIN RED BY SUPERMACROPOROUS CROSS-LINKED CHITOSAN MONOLITH SORBENTS","authors":"Y. Privar, E. Modin, S. Bratskaya, Donostia Cic nanoGUNE","doi":"10.15259/pcacd.24.015","DOIUrl":"https://doi.org/10.15259/pcacd.24.015","url":null,"abstract":"Here, we report the fabrication of supermacroporous monolith sorbents for acidic dye removal via chitosan cross-linking with ethylene glycol diglycidyl ether (EGDGE) in acidic medium at sub-zero temperature. The developed porous structure with the thickness of polymer walls in the range of a few microns and a high content of primary amino groups determined the high sorption capacity of the sorbents toward Alizarin Red in a broad pH range (2–8). Due to the cross-linking via hydroxyl groups of the chitosan, the static sorption capacity of the fabricated materials was higher than that of chitosan flakes, even for sorbents cross-linked at EGDGE:NH 2 -chitosan with molar ratio 2:1. The monolith sorbents were mechanically stable and supported flow rates up to 300 bed volumes per hour. The breakthrough curve of Alizarin Red sorption showed that the effective dynamic sorption capacity was 283 mg/g, and 100% of the dye could be removed from the solutions with concentration of 100 mg/L. The monoliths can be regenerated with 0.3s M NaOH solution and used in several consecutive cycles of sorption/regeneration without loss of efficacy.","PeriodicalId":44461,"journal":{"name":"Progress on Chemistry and Application of Chitin and its Derivatives","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42266973","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}
U. Filipkowska, M. Olsztyn, T. Jóźwiak, Luminita Gache, Ludmila Bolozan
{"title":"THE INFLUENCE OF CHITOSAN CONTENT IN HYDROGEL BEADS ON THE SORPTION EFFECTIVENESS OF REACTIVE BLACK 5 DYE","authors":"U. Filipkowska, M. Olsztyn, T. Jóźwiak, Luminita Gache, Ludmila Bolozan","doi":"10.15259/pcacd.24.003","DOIUrl":"https://doi.org/10.15259/pcacd.24.003","url":null,"abstract":"","PeriodicalId":44461,"journal":{"name":"Progress on Chemistry and Application of Chitin and its Derivatives","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48531013","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}
In the present paper, cold plasma-activated and chitosan-coated polyetheretherketone (PEEK) was covered with thin films of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine, cholesterol, cyclosporine A, and their mixtures using the Langmuir-Blodgett technique. The thermodynamic function, i.e., surface free energy, of those systems was determined based on the contact angle hysteresis (CAH) approach. This parameter seems to be essential in determination of cell adhesion to polymeric materials and molecular interactions with living tissues. The obtained results show that the wettability and surface free energy of PEEK can be changed depending on the composition of the coating.
{"title":"WETTABILITY OF CHITOSAN-MODIFIED AND LIPID/POLYPEPTIDE-COATED PEEK SURFACES","authors":"K. Przykaza, K. Woźniak, M. Jurak, A. Wiącek","doi":"10.15259/pcacd.24.016","DOIUrl":"https://doi.org/10.15259/pcacd.24.016","url":null,"abstract":"In the present paper, cold plasma-activated and chitosan-coated polyetheretherketone (PEEK) was covered with thin films of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine, cholesterol, cyclosporine A, and their mixtures using the Langmuir-Blodgett technique. The thermodynamic function, i.e., surface free energy, of those systems was determined based on the contact angle hysteresis (CAH) approach. This parameter seems to be essential in determination of cell adhesion to polymeric materials and molecular interactions with living tissues. The obtained results show that the wettability and surface free energy of PEEK can be changed depending on the composition of the coating.","PeriodicalId":44461,"journal":{"name":"Progress on Chemistry and Application of Chitin and its Derivatives","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42609439","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}
N. Drozd, B. Shagdarova, Y. V. Zhuikova, A. Il’ina, M. Vasiliev, T. Vasilieva, A. M. Hein, V. Varlamov
{"title":"THROMBORESISTANT SILICON PLATES MODIFIED WITH CHITOSAN AND HEPARIN BY THE LAYER-BY-LAYER ASSEMBLY METHOD","authors":"N. Drozd, B. Shagdarova, Y. V. Zhuikova, A. Il’ina, M. Vasiliev, T. Vasilieva, A. M. Hein, V. Varlamov","doi":"10.15259/pcacd.24.001","DOIUrl":"https://doi.org/10.15259/pcacd.24.001","url":null,"abstract":"","PeriodicalId":44461,"journal":{"name":"Progress on Chemistry and Application of Chitin and its Derivatives","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45468978","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}
S. Fadlaoui, O. E. Asri, Lakrat Mohammed, A. Sihame, A. Omari, M. Melhaoui
This work presents, for the first time, the extraction and characterization of chitin from the shell of the freshwater crab species Potamon algeriense with a standardized and revised chemical method. Chitin and chitosan were isolated following demineralization, deproteinization, decolouration (raw chitin), and deacetylation (chitosan). After boiling, drying, and grinding, 62.12% of the ground shell was obtained. A yield of 40.92% was obtained after demineralization of ground crab shell, while after the deproteinization process 8.74% was obtained. After decolourization, 8.27% of raw chitin was obtained, and the final amount of chitosan extracted from the crab shells was approximately 5.89%. We also characterized the isolated chitin by determining its physicochemical properties using X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). the of chitin. During the fourth step, we observed the biggest mass loss rate (24.8%). The mass loss observed at this was due to the decomposition of calcite in the collagen calcite. These results show the good thermal stability of the extracted chitin.
{"title":"ISOLATION AND CHARACTERIZATION OF CHITIN FROM SHELLS OF THE FRESHWATER CRAB POTAMON ALGERIENSE","authors":"S. Fadlaoui, O. E. Asri, Lakrat Mohammed, A. Sihame, A. Omari, M. Melhaoui","doi":"10.15259/pcacd.24.002","DOIUrl":"https://doi.org/10.15259/pcacd.24.002","url":null,"abstract":"This work presents, for the first time, the extraction and characterization of chitin from the shell of the freshwater crab species Potamon algeriense with a standardized and revised chemical method. Chitin and chitosan were isolated following demineralization, deproteinization, decolouration (raw chitin), and deacetylation (chitosan). After boiling, drying, and grinding, 62.12% of the ground shell was obtained. A yield of 40.92% was obtained after demineralization of ground crab shell, while after the deproteinization process 8.74% was obtained. After decolourization, 8.27% of raw chitin was obtained, and the final amount of chitosan extracted from the crab shells was approximately 5.89%. We also characterized the isolated chitin by determining its physicochemical properties using X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). the of chitin. During the fourth step, we observed the biggest mass loss rate (24.8%). The mass loss observed at this was due to the decomposition of calcite in the collagen calcite. These results show the good thermal stability of the extracted chitin.","PeriodicalId":44461,"journal":{"name":"Progress on Chemistry and Application of Chitin and its Derivatives","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46295789","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}
M. Konovalova, Shemyakin, B. Shagdarova, V. Zubov, E. Svirshchevskaya
{"title":"EXPRESS ANALYSIS OF CHITOSAN AND ITS DERIVATIVES BY GEL ELECTROPHORESIS","authors":"M. Konovalova, Shemyakin, B. Shagdarova, V. Zubov, E. Svirshchevskaya","doi":"10.15259/pcacd.24.007","DOIUrl":"https://doi.org/10.15259/pcacd.24.007","url":null,"abstract":"","PeriodicalId":44461,"journal":{"name":"Progress on Chemistry and Application of Chitin and its Derivatives","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43002649","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}
E. Kuprina, S. Murashev, E. Gorlach, V. Abramzon, P. I. Demidov, Evgenia S. Grishina, Anastasia K. Kostyleva, S. Diana
{"title":"PERSPECTIVE FOR THE USE OF CHITIN MINERAL FOOD ADDITIVES IN THE TECHNOLOGY OF HARD-SMOKED SAUSAGES","authors":"E. Kuprina, S. Murashev, E. Gorlach, V. Abramzon, P. I. Demidov, Evgenia S. Grishina, Anastasia K. Kostyleva, S. Diana","doi":"10.15259/pcacd.24.008","DOIUrl":"https://doi.org/10.15259/pcacd.24.008","url":null,"abstract":"","PeriodicalId":44461,"journal":{"name":"Progress on Chemistry and Application of Chitin and its Derivatives","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44151739","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}
Gastro-esophageal reflux is a term that defines the reverse flow of acid gastric contents into the esophagus. On the other hand, alkaline reflux occurs in the case when alkaline intestinal contents enter the esophagus. The aim of the study was to examine the pharmaceutical properties of gels for the treatment of gastro-esophageal reflux, covering the mucosa, allowing prolonged contact with the esophageal mucosa. Formulations containing the PVP K-30 showed the lowest pH, which is an important feature and can be used in the treatment of advanced alkaline reflux. Gels containing PVP K-90 and chitosan can be used in the treatment of acid reflux. The addition of chitosan significantly increased the dynamic viscosity of the tested gels. The study of the work of adhesion showed the effect of PVP K-30 and PVP K-90 and their concentration on the value of the work of adhesion. The presented studies have shown that it is possible to obtain gels with high adhesion to the esophageal mucous membrane.
{"title":"INFLUENCE OF CHITOSAN ON THE PROPERTIES OF GELS PROTECTING OF THE ESOPHAGEAL MUCOSA","authors":"K. Małolepsza-Jarmołowska","doi":"10.15259/pcacd.24.012","DOIUrl":"https://doi.org/10.15259/pcacd.24.012","url":null,"abstract":"Gastro-esophageal reflux is a term that defines the reverse flow of acid gastric contents into the esophagus. On the other hand, alkaline reflux occurs in the case when alkaline intestinal contents enter the esophagus. The aim of the study was to examine the pharmaceutical properties of gels for the treatment of gastro-esophageal reflux, covering the mucosa, allowing prolonged contact with the esophageal mucosa. Formulations containing the PVP K-30 showed the lowest pH, which is an important feature and can be used in the treatment of advanced alkaline reflux. Gels containing PVP K-90 and chitosan can be used in the treatment of acid reflux. The addition of chitosan significantly increased the dynamic viscosity of the tested gels. The study of the work of adhesion showed the effect of PVP K-30 and PVP K-90 and their concentration on the value of the work of adhesion. The presented studies have shown that it is possible to obtain gels with high adhesion to the esophageal mucous membrane.","PeriodicalId":44461,"journal":{"name":"Progress on Chemistry and Application of Chitin and its Derivatives","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67092219","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：