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1. Hydrophobization of Cellulose Sheets by Gas Grafting of Palmitoyl Chloride by Using Hot Press.

Author

Choi KH, Lee KS, Lee JH, and Ryu JY

Subjects
Esterification, Permeability, Polyvinyl Alcohol chemistry, Surface Properties, Water chemistry, Cellulose chemistry, Hot Temperature, Hydrophobic and Hydrophilic Interactions, Palmitates chemistry, Pressure
Abstract

The purpose of this study was to investigate the improvement in the hydrophobicity of cellulose through gas grafting treatment with long chain fatty acid chloride using high pressure during pressing at high temperature. To do this, the gas grafting treatment was performed on the cellulose sheet using a hot pressing method, and then the hydrophobization effect was analyzed. It was found that the gas grafting treatment by hot pressing using high pressure during pressing at high temperature produced cellulose sheets of high hydrophobicity. Especially, it was notable that the hydrophobization efficiency enhanced with an increase of the pressing pressure. In addition, the gas grafting efficiency was improved when polyvinyl alcohol (PVA) was coated to obtain high resistance to air permeability. These results indicate that protecting the loss of fatty acid gas by coating of polyvinyl alcohol (PVA) on the cellulose sheet surface contributed to the improvement of gas grafting efficiency., (Copyright © 2020 Elsevier Ltd. All rights reserved.)

Published
2020
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2. High-pressure intrapleural chemotherapy: feasibility in the pig model

Author

Bernard Royer, Alain Bernard, Bruno Chauffert, Pablo Ortega-Deballon, Olivier Facy, Guy Magnin, Pierre-Benoit Pagès, Sylvain Ladoire, Lipides - Nutrition - Cancer (U866) ( LNC ), Université de Bourgogne ( UB ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Ecole Nationale Supérieure de Biologie Appliquée à la Nutrition et à l'Alimentation de Dijon ( ENSBANA ), Service de Chirurgie Digestive, Cancérologique, Générale, Endocrinienne et Urgences (CHU de Dijon), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand ( CHU Dijon ), Service de chirurgie cardio-vasculaire, Service d'anesthésie réanimation, Centre Régional de Lutte contre le cancer - Centre Georges-François Leclerc ( CRLCC - CGFL ), Laboratoire de Pharmacologie Clinique et Toxicologie [Besancon], Centre Hospitalier Régional Universitaire [Besançon] ( CHRU Besançon ) -Hôpital Jean Minjoz-Université de Franche-Comté ( UFC ), Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC ( HOTE GREFFON ), Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Etablissement français du sang [Bourgogne-France-Comté] ( EFS [Bourgogne-France-Comté] ) -Université de Franche-Comté ( UFC ), This paper was supported by research grants from the French National League against Cancer, from the Regional Council of Burgundy and from the University Hospital of Dijon (France)., Lipides - Nutrition - Cancer (U866) (LNC), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Ecole Nationale Supérieure de Biologie Appliquée à la Nutrition et à l'Alimentation de Dijon (ENSBANA), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Centre Régional de Lutte contre le cancer Georges-François Leclerc [Dijon] (UNICANCER/CRLCC-CGFL), UNICANCER, Laboratoire de Pharmacologie Clinique et Toxicologie [CHRU Besancon], Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC (UMR INSERM 1098) (RIGHT), Institut National de la Santé et de la Recherche Médicale (INSERM)-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté])-Université de Franche-Comté (UFC), BMC, Ed., Service de chirurgie cardio-vasculaire et thoracique (CHU Dijon), and Service d'anesthésie - réanimation chirurgicale [CHU de Dijon]

Subjects
medicine.medical_specialty, [SDV.MHEP.CHI] Life Sciences [q-bio]/Human health and pathology/Surgery, Swine, Pleural Neoplasms, lcsh:Surgery, Intra arterial chemotherapy, [SDV.CAN]Life Sciences [q-bio]/Cancer, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, lcsh:RC254-282, Deoxycytidine, [ SDV.CAN ] Life Sciences [q-bio]/Cancer, 03 medical and health sciences, chemistry.chemical_compound, pressure, 0302 clinical medicine, [SDV.CAN] Life Sciences [q-bio]/Cancer, Surgical oncology, Neoplasms, Antineoplastic Combined Chemotherapy Protocols, medicine, Tumor Cells, Cultured, Animals, Humans, Intrapleural chemotherapy, Pleural Neoplasm, [ SDV.MHEP.CHI ] Life Sciences [q-bio]/Human health and pathology/Surgery, pig model, Cisplatin, business.industry, Research, Pig model, lcsh:RD1-811, intrapleural intracavitary chemotherapy, lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens, Gemcitabine, 3. Good health, Surgery, 030228 respiratory system, chemistry, Oncology, 030220 oncology & carcinogenesis, High pressure, Feasibility Studies, Female, business, medicine.drug
Abstract

Background The usual treatments for pleural malignancies are mostly palliative. In contrast, peritoneal malignancies are often treated with a curative intent by cytoreductive surgery and intraperitoneal chemotherapy. As pressure has been shown to increase antitumor efficacy, we applied the concept of high-pressure intracavitary chemotherapy to the pleural space in a swine model. Methods Cisplatin and gemcitabine were selected because of their antineoplasic efficacy in vitro in a wide spectrum of cancer cell lines. The pleural cavity of 21 pigs was filled with saline solution; haemodynamic and respiratory parameters were monitored. The pressure was increased to 15-25 cm H2O. This treatment was associated with pneumonectomy in 6 pigs. Five pigs were treated with chemotherapy under pressure. Results The combination of gemcitabine (100 mg/l) and cisplatin (30 mg/l) was highly cytotoxic in vitro. The maximum tolerated pressure was 20 cm H20, due to haemodynamic failure. Pneumonectomy was not tolerated, either before or after pleural infusion. Five pigs survived intrapleural chemotherapy associating gemcitabine and cisplatin with 20 cm H2O pressure for 60 min. Conclusions High-pressure intrapleural chemotherapy is feasible in pigs. Further experiments will establish the pharmacokinetics and determine whether the benefit already shown in the peritoneum is also obtained in the pleura.

Published
2012