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Development of Active Films with Collagen Fiber and Polyvinyl Alcohol Mixture and Incorporation of Oregano and Rosemary Essential Oils in Their Matrix
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作者 Suslin Raatz Thiel Mari Silvia Rodrigues De Oliveira +5 位作者 Vinícius Badia Stephanie Reis Ribeiro Roger Wagner Tatiana Emanuelli Rosa Cristina Prestes Renius Mello 《Food and Nutrition Sciences》 2023年第7期601-625,共25页
The aim was to develop films with a new mixture of collagen fiber plus polyvinyl alcohol added of oregano or rosemary essential oils at different levels (0%, 2%, 4% and 6%), as well as to assess the antimicrobial acti... The aim was to develop films with a new mixture of collagen fiber plus polyvinyl alcohol added of oregano or rosemary essential oils at different levels (0%, 2%, 4% and 6%), as well as to assess the antimicrobial activity, physical, optical, microstructure and molecular properties in the films. An interaction between the ingredients was observed at the molecular level by FTIR. The amide II and amide III bands, which are important to verify collagen conformation, showed intense peaks in the films. The formation of a network through collagen fibers was produced, acting as a reinforcement in matrix. The films with essential oil had an expressive antimicrobial activity by the steam contact method (micro-atmosphere), mainly for Escherichia coli and Staphylococcus aureus. The mixture of collagen fiber plus polyvinyl alcohol added of essential oils is a promising matrix for application in food as active packaging. 展开更多
关键词 Antimicrobial Activity Biodegradable Packaging Bioactive Volatile Compounds Fourier Transformed Infrared Spectroscopy Scanning Electron Microscopy Sustainable Packaging
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Determination of Trace Mercury by Catalytic Solid Substrate-room Temperature Phosphorimetry
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作者 Jia Ming LIU Yun Xiong WU +6 位作者 Shao Xian LIN Fei Ming LI Xiu Mei SHI Zhong Bin SHI Guo Hui ZHU Zhi Ming LI Xiao Mei HUANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第12期1582-1584,共3页
A new highly sensitive method (detection limit: 4.1 ag spofx, sample volume: 0.4 gL spot^·l) for the determination of trace Hg2^2+ by catalytic solid substrate-room temperature phosphorimetry has been establ... A new highly sensitive method (detection limit: 4.1 ag spofx, sample volume: 0.4 gL spot^·l) for the determination of trace Hg2^2+ by catalytic solid substrate-room temperature phosphorimetry has been established in this paper. This method has been successfully applied to determine trace Hg6^2+ in water. 展开更多
关键词 Hg^2+ Α-NAPHTHYLAMINE sulfanilic acid catalytic solid substrate-room temperature phosphorimetry.
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Synthesis of biheteroaryls via 2-methyl quinoline C(sp^(3))-H functionalization under metal-free conditions 被引量:1
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作者 Dahan Wang Yuhan Yang +3 位作者 Fuhong Xiao Jinbing Liu Guojiang Mao Guo-Jun Deng 《Green Synthesis and Catalysis》 2024年第1期73-76,共4页
An acetic acid-promoted C(sp^(3))-H functionalization of 2-methyl quinoline,enaminoesters and elemental sulfur for the synthesis of 3,4,5-trisubstituted isothiazoles under metal-free conditions has been developed.This... An acetic acid-promoted C(sp^(3))-H functionalization of 2-methyl quinoline,enaminoesters and elemental sulfur for the synthesis of 3,4,5-trisubstituted isothiazoles under metal-free conditions has been developed.This approach provides viable access to various 5-(quinolin-2-yl)isothiazoles in moderate to good yields with good functional group tolerance.Moreover,the success of the gram-scale reaction gives this reaction a great potential application. 展开更多
关键词 C(sp^(3))-H functionalization Multicomponent reactions Biheteroaryls Elemental sulfur METAL-FREE
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A review on WO_(3)-based composite photocatalysts:synthesis,catalytic mechanism and diversified applications
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作者 Xue Zhang Zi-Qi Zhang +6 位作者 Yan-Dong Sun Xiao-Jia Ma Feng-Xian Jin Fang-Yuan Zhang Wei-Guang Han Bo-Xiong Shen Sheng-Qi Guo 《Rare Metals》 SCIE EI CAS CSCD 2024年第8期3441-3459,共19页
Photocatalysis as an emerging "green" energy conversion technology has attracted domestic and international attention.This technology uses semiconductor photocatalysts to convert solar energy into directly u... Photocatalysis as an emerging "green" energy conversion technology has attracted domestic and international attention.This technology uses semiconductor photocatalysts to convert solar energy into directly usable chemical energy,showing great potential for application in environmental pollutant purification and clean energy production,with broad development prospects.Among many semiconductor materials,tungsten trioxide(WO_(3)) is favored by researchers in the field of photocatalysis because of its good visible light response and excellent valence band hole oxidation properties.Currently,a large number of photocatalysts based on WO_(3),in particular W03-based composite photocatalysts,have been reported,and their applications cover a wide range of fields.In order to promote the development of WO_(3)-based photocatalysts and provide a reference for colleagues,we present a systematic summary of the applications and research progress of W03-based composites in the field of photocatalysis in recent years.Starting from the structural properties of WO_(3)itself,this article summarizes the preparation methods and structure-activity relationships of WO_(3)-based composite photocatalysts.Subsequently,it introduces the current application status of existing WO_(3)-based composite photocatalysts in CO_(2) reduction,hydrogen production,nitrogen fixation,and pollutant removal.Finally,the development prospects were analyzed. 展开更多
关键词 WO_(3)-based composite photocatalysts Intrinsic characteristic Preparation method Reaction mechanism APPLICATIONS
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