Pub Date : 2022-01-01DOI: 10.1590/0104-1428.20210082
T. Ribeiro, J. A. Scramin, J. Rodrigues, Rubens Bernardes Filho, L. Colnago, L. A. Forato
Carlos, SP, Brasil *tatianaribeiro@ufscar.br Obstract Kafirins, water-insoluble proteins from Sweet Sorghum BR501 grains, have been an alternative to prepare edible coatings for food due to their hydrophobic character. In this work, the secondary structures (SS) content of reduced (SSr) and unreduced (SSu) kafirins were determined by 13 C solid-state-NMR spectroscopy using areas of carbonyl peak. The SS elucidate by fitting the signal with the Lorentzian function shows 56% and 59% of α-helix and 40% and 12% of β-sheet structures for SSr and SSu, respectively. The SS also were elucidated by a Singular value decomposition- SVD method shows 55% and 49% of α-helix and 12% and 8% of β-sheet structure for SSr and SSu, respectively. Since SVD does not depend on the operator and has higher correlation coefficients for α-helix (0.96%) and β-sheet (0.91%), it is a reliable method to quantify the SS of insoluble proteins using
{"title":"13C ss-NMR Singular value decomposition and fitting for sorghum proteins conformation elucidation","authors":"T. Ribeiro, J. A. Scramin, J. Rodrigues, Rubens Bernardes Filho, L. Colnago, L. A. Forato","doi":"10.1590/0104-1428.20210082","DOIUrl":"https://doi.org/10.1590/0104-1428.20210082","url":null,"abstract":"Carlos, SP, Brasil *tatianaribeiro@ufscar.br Obstract Kafirins, water-insoluble proteins from Sweet Sorghum BR501 grains, have been an alternative to prepare edible coatings for food due to their hydrophobic character. In this work, the secondary structures (SS) content of reduced (SSr) and unreduced (SSu) kafirins were determined by 13 C solid-state-NMR spectroscopy using areas of carbonyl peak. The SS elucidate by fitting the signal with the Lorentzian function shows 56% and 59% of α-helix and 40% and 12% of β-sheet structures for SSr and SSu, respectively. The SS also were elucidated by a Singular value decomposition- SVD method shows 55% and 49% of α-helix and 12% and 8% of β-sheet structure for SSr and SSu, respectively. Since SVD does not depend on the operator and has higher correlation coefficients for α-helix (0.96%) and β-sheet (0.91%), it is a reliable method to quantify the SS of insoluble proteins using","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67121173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/0104-1428.20220009
Rafael Affonso Netto, Fabrícia Faria de Menezes, Rubens Maciel Filho, J. Bartoli
{"title":"Poly(methyl methacrylate) and silica nanocomposites as new materials for polymeric optical devices","authors":"Rafael Affonso Netto, Fabrícia Faria de Menezes, Rubens Maciel Filho, J. Bartoli","doi":"10.1590/0104-1428.20220009","DOIUrl":"https://doi.org/10.1590/0104-1428.20220009","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67121569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/0104-1428.20220025
Pollyana Marcondes, Gisela Helou Rosas, M. E. L. González, A. Queiroz, P. S. Marques
{"title":"Poly(vinyl alcohol)/poly(glycerol) dendrimer hydrogel mediated green synthesis of silver nanoparticles","authors":"Pollyana Marcondes, Gisela Helou Rosas, M. E. L. González, A. Queiroz, P. S. Marques","doi":"10.1590/0104-1428.20220025","DOIUrl":"https://doi.org/10.1590/0104-1428.20220025","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67121893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/0104-1428.210075
L. K. Lazzari, D. Perondi, A. J. Zattera, Ruth Marlene Campomanes Santana
Poultry litter waste (PLW) is the main by-product generated by the Brazilian poultry industry. A sustainable approach for reusing this waste is the production of biochar to be further used aiming CO2 adsorption. In this work, biochars were produced by varying the N2 flow along the pyrolysis process of 150 (PLW-150) and 1000 (PLW-1000) mL min -1. PLW and biochars were characterized for their morphology, porosity, specific surface area, and CO2 adsorption capacity. From the biochars, carbon cryogels (CC) were produced aiming their use as CO2 adsorbents. The results of the cryogel adsorption test showed a CO2 adsorption capacity of 13.1±2.9 and 33.8±3.3 mg g -1 for the CC-PLW.150 and CC-PLW.1000 cryogels, respectively. Therefore, reusing this residue for cryogels production and its use in the CO2 adsorption signifies an attractive perspective to minimize the environmental damage caused by CO2 emissions.
家禽垃圾(PLW)是巴西家禽业产生的主要副产品。一种可持续的方法是生产生物炭，进一步用于二氧化碳吸附。在这项工作中，通过在150 (PLW-150)和1000 (PLW-1000) mL min -1的热解过程中改变N2流量来生产生物炭。对PLW和生物炭的形貌、孔隙度、比表面积和CO2吸附能力进行了表征。从这些生物炭中，制备了碳冷冻剂(CC)，目的是将其用作二氧化碳吸附剂。低温凝胶吸附实验结果表明，CC-PLW的CO2吸附量分别为13.1±2.9和33.8±3.3 mg g -1。150和CC-PLW。分别是1000个冰镇。因此，将这些残渣用于冷冻产品的生产和二氧化碳的吸附是一个很有吸引力的前景，可以最大限度地减少二氧化碳排放对环境造成的破坏。
{"title":"CO2 adsorption by cryogels produced from poultry litter wastes","authors":"L. K. Lazzari, D. Perondi, A. J. Zattera, Ruth Marlene Campomanes Santana","doi":"10.1590/0104-1428.210075","DOIUrl":"https://doi.org/10.1590/0104-1428.210075","url":null,"abstract":"Poultry litter waste (PLW) is the main by-product generated by the Brazilian poultry industry. A sustainable approach for reusing this waste is the production of biochar to be further used aiming CO2 adsorption. In this work, biochars were produced by varying the N2 flow along the pyrolysis process of 150 (PLW-150) and 1000 (PLW-1000) mL min -1. PLW and biochars were characterized for their morphology, porosity, specific surface area, and CO2 adsorption capacity. From the biochars, carbon cryogels (CC) were produced aiming their use as CO2 adsorbents. The results of the cryogel adsorption test showed a CO2 adsorption capacity of 13.1±2.9 and 33.8±3.3 mg g -1 for the CC-PLW.150 and CC-PLW.1000 cryogels, respectively. Therefore, reusing this residue for cryogels production and its use in the CO2 adsorption signifies an attractive perspective to minimize the environmental damage caused by CO2 emissions.","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67125476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/0104-1428.20220016
Dalila Pinto Malaquias, L. Dourado, Â. Lana, Fernando Souza, José Vilela, Margareth Andrade, J. Roa, Á. D. Carvalho-Junior, E. A. Leite
{"title":"Development and optimization by factorial design of polymeric nanoparticles for simvastatin delivery","authors":"Dalila Pinto Malaquias, L. Dourado, Â. Lana, Fernando Souza, José Vilela, Margareth Andrade, J. Roa, Á. D. Carvalho-Junior, E. A. Leite","doi":"10.1590/0104-1428.20220016","DOIUrl":"https://doi.org/10.1590/0104-1428.20220016","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67121685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/0104-1428.20210040
Mauro Cesar de Avila, A. P. Munaro, M. Munaro
{"title":"Development and evaluation of nitrile rubbers seals for power transformer application","authors":"Mauro Cesar de Avila, A. P. Munaro, M. Munaro","doi":"10.1590/0104-1428.20210040","DOIUrl":"https://doi.org/10.1590/0104-1428.20210040","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67120866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/0104-1428.20220014
Ariane Sarzi Porto, J. L. Alves, A. Morales
{"title":"Interactions of PP-PET blends modified by montmorillonite with different polarities","authors":"Ariane Sarzi Porto, J. L. Alves, A. Morales","doi":"10.1590/0104-1428.20220014","DOIUrl":"https://doi.org/10.1590/0104-1428.20220014","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67121677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/0104-1428.20210110
Hüseyin Tan, M. Şirin, H. Baltaş
{"title":"Ecological structure: production of organic impregnation material from mussel shell and combustion","authors":"Hüseyin Tan, M. Şirin, H. Baltaş","doi":"10.1590/0104-1428.20210110","DOIUrl":"https://doi.org/10.1590/0104-1428.20210110","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67121596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/0104-1428.20220013
Jefferson Renan Santos da Silva, J. V. C. Fonseca, Thais da Silva Santos, Josiel Bruno de Oliveira, Thiago Monteiro Maquiné, Bruno Mello de Freitas, Raimundo Nonato Alves Silva, N. R. Nascimento, J. Costa, R. Bello, José Costa de Macêdo Neto
{"title":"Polymer composite produced with Brazil nut residues and high impact polystyrene","authors":"Jefferson Renan Santos da Silva, J. V. C. Fonseca, Thais da Silva Santos, Josiel Bruno de Oliveira, Thiago Monteiro Maquiné, Bruno Mello de Freitas, Raimundo Nonato Alves Silva, N. R. Nascimento, J. Costa, R. Bello, José Costa de Macêdo Neto","doi":"10.1590/0104-1428.20220013","DOIUrl":"https://doi.org/10.1590/0104-1428.20220013","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67121639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1590/0104-1428.20220050
Juan-Ramón Campos-Cruz, N. Rangel-Vázquez, R. E. Zavala-Arce, Edgar Márquez-Brazon
{"title":"Polyurethane/single wall carbon nanotube/polymethylmethacrylate nanocomposite: PM3 semi-empirical method, Monte Carlo applied","authors":"Juan-Ramón Campos-Cruz, N. Rangel-Vázquez, R. E. Zavala-Arce, Edgar Márquez-Brazon","doi":"10.1590/0104-1428.20220050","DOIUrl":"https://doi.org/10.1590/0104-1428.20220050","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67122113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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