Article
Environmental Sciences
Mengze Geng, Xin Huang, Baoyou Shi, Jianwei Yu, Chunmiao Wang, Yuning Du, Yili Wang
Summary: The swampy/septic odor caused by thioethers is a major taste and odor problem in China's drinking water. Pre-oxidation has been found to improve the coagulation performance of thioethers, increasing their removal rates by 1.5 to 3 times. Bovine serum albumin (BSA) as background dissolved organic matter (DOM) enhances the removal efficiency of thioethers compounds compared to humic acid (HA), and the binding effect between BSA and thioethers compounds is mainly due to van der Waals forces and hydrogen bond. Therefore, pre-ozonation combined with coagulation is suggested for better control of thioethers compounds.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Organic
Dongying Ma, Jingjing Sun, Hua Chen, Wenzhi Xu, Yafang Wang, Changying Song, Tiesheng Shi, Shuying Huo, Shiangang Shen
Summary: In this study, an efficient method for the formation of disulfide bonds in peptides using Pt(IV) complex was developed. The reaction proceeded in aqueous medium under aerobic conditions and yielded peptides with good yields in a short reaction time.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Natacha Rombaut, Tony Chave, Sergey I. Nikitenko, Mohamed El Maataoui, Anne Sylvie Fabiano-Tixier, Farid Chemat
Summary: The impact of 20 kHz ultrasound on olive leaves in increasing polyphenol extraction was investigated, with the effectiveness depending on plant structure and its reaction to acoustic cavitation. Ultrasound seems to affect the leaves by eroding the cuticle and fragmenting the surface protrusions of olive leaves, both of which are polyphenol-rich structures.
APPLIED SCIENCES-BASEL
(2021)
Review
Computer Science, Information Systems
Jatin Karthik Tripathy, Sibi Chakkaravarthy Sethuraman, Meenalosini Vimal Cruz, Anupama Namburu, P. Mangalraj, R. Nandha Kumar, S. Sudhakar Ilango, Vaidehi Vijayakumar
Summary: In the past decade, there has been a significant increase in data and computing power, leading to new developments in the field of Natural Language Processing (NLP). This paper delves into the underlying ideas and methods behind embeddings and large pre-trained models, comparing the pros and cons of different strategies, datasets, and architectures.
COMPUTER SCIENCE REVIEW
(2021)
Review
Food Science & Technology
Gustavo V. Barbosa-Canovas, Francesco Donsi, Semanur Yildiz, Kezban Candogan, Prashant Raj Pokhrel, Andrea Y. Guadarrama-Lezama
Summary: Nonthermal technologies for processing selected foods are becoming increasingly relevant in the food industry as they preserve the nutritional value and fresh characteristics. The impact of these technologies on bioactive compounds serves as a key indicator to assess nutritional changes in food products before and after processing. Despite challenges in comparing results, scientific literature and data provide valuable insights into how nonthermal processing affects different bioactive compounds.
FOOD ENGINEERING REVIEWS
(2022)
Article
Chemistry, Analytical
Akane Shoda, Tomo Miyazaki, Shinichiro Omachi
Summary: This paper presents a method for generating high-quality images using deep learning. By reducing and smoothing colors and gradient regions in the original images before JPEG compression, the proposed method improves image quality and suppresses noise and pseudo-contour in the compressed images. Compared to traditional JPEG, the proposed method outperforms in quality measurements.
Review
Food Science & Technology
Nitin Mehta, S. Jeyapriya, Pavan Kumar, Akhilesh Kumar Verma, Pramila Umaraw, Sunil Kumar Khatkar, Anju Boora Khatkar, Devendra Pathak, Ubedullah Kaka, Awis Qurni Sazili
Summary: There is a rich potential of underutilized bioactive components in nature, and ultrasound-assisted extraction and encapsulation techniques have promising applications in the food industry to reduce costs, operational time, and energy consumption.
Article
Materials Science, Multidisciplinary
Jinyu Gu, Lei Wang, Qingfeng Song, Chao Wang, Xugui Xia, Jincheng Liao, Yi-Yang Sun, Lidong Chen, Shengqiang Bai
Summary: This study systematically investigates the oxidation behavior of Zr 0.5 Hf 0.5 CoSb 0.8 Sn 0.2 half-Heusler material at high temperatures. It is found that three typical layers of oxidation products tend to form on the surface, among which the dense oxide layer and alternate oxide layer help block the outward diffusion of Zr/Hf. Pre-oxidation treatment improves the oxidation resistance of the material.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Dehua Yang, Linhai Li, Xiao Li, Wei Xi, Yuejuan Zhang, Yumin Liu, Xiaojun Wei, Weiya Zhou, Fei Wei, Sishen Xie, Huaping Liu
Summary: We report a method for industrial separation of single-chirality carbon nanotubes using gel chromatography with increased concentration of carbon nanotube solution. The technique allows for increased concentration of individualized carbon nanotubes and higher separation yield of single-chirality species. By applying this technique to a hybrid of graphene and carbon nanotubes, the separation yield is significantly increased and the environmental impact and cost of production are reduced. This method promotes the industrial production and practical applications of single-chirality carbon nanotubes.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Biswa Nath Bhadra, Yong Su Baek, Sunghwan Kim, Cheol Ho Choi, Sung Hwa Jhung
Summary: Tungsten nitride-incorporated carbon was successfully prepared and utilized for oxidative denitrogenation of fuels, demonstrating high efficiency in removing organo-nitrogen compounds. The oxidation mechanism of this material may be determined by the electron density on the N-atom of ONCs, and the ultrasonic-assisted oxidative denitrogenation reaction pathway was supported by peroxide crystallinity and radical experiments.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Chemical
Keyu Yao, Lei Fang, Pubin Liao, Huishan Chen
Summary: The efficiency and mechanism of ultrasound-activated peracetic acid (US/PAA) in removing tetracycline hydrochloride (TCH) were investigated in this study. The results showed that the US/PAA process successfully removed organic contaminants from water, achieving a degradation efficiency of 99.4% for TCH within 30 minutes. The addition of ultrasonic radiation effectively activated PAA and significantly increased the degradation efficiency of TCH compared to the PAA process. Singlet oxygen and organic radicals played a crucial role in the degradation of TCH during the US/PAA process, as demonstrated by electron paramagnetic resonance and radical quenching experiments.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Applied
Wolfgang Jud, Chase A. Salazar, Joseph Imbrogno, Jenson Verghese, Steven M. Guinness, Jean-Nicolas Desrosiers, C. Oliver Kappe, David Cantillo
Summary: An electrochemical method for converting primary alcohols to carboxylic acids has been developed. This method can be used with various alcohols containing nitrogen-containing heterocycles in both continuous flow and batch modes. The use of a heterogeneous NiOOH electron-proton transfer mediator eliminates the need for homogeneous catalysts, reducing unit operations and process mass intensity.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2022)
Article
Chemistry, Multidisciplinary
Marcel Krug, Nina Frohlich, Dominik Fehn, Alexander Vogel, Frank Rominger, Karsten Meyer, Timothy Clark, Milan Kivala, Dirk M. Guldi
Summary: Three linear dimers containing two redox-active planarized triphenylamines were synthesized and their structures verified by X-ray crystallography. Investigation of their radical cations using various techniques revealed the significance of using redox centers with low internal reorganization energies. Distance-dependence attenuation factor of the super-exchange mechanisms remained similar when compared with non-planarized nitrogen-centered building blocks.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Wenbin Liu, Jack Twilton, Bo Wei, Maizie Lee, Melissa N. Hopkins, John Bacsa, Shannon S. Stahl, Huw M. L. Davies
Summary: A mild method for accessing diazo compounds via aerobic oxidation of hydrazones was described, using a Cu(OAc)(2)/pyridine catalyst and molecular oxygen. Insight gained from mechanistic studies led to the expansion of this method to include diaryl hydrazones, delivering diaryl diazomethane derivatives. The products can be used in rhodium carbene catalysis without isolation of the diazo intermediate to afford cyclopropane products in good yield with high enantioselectivity.
Article
Chemistry, Multidisciplinary
Glen A. Frerichs, Desmond Yengi
Summary: The Belousov-Zhabotinsky (BZ) oscillating chemical reaction involves complex oscillations, influenced by factors such as initial concentrations of sodium bromate and methylmalonic acid, their ratio, as well as temperature and stirring rate. The reaction also exhibits phenomena like mixed mode oscillations, birhythmicity, quasiperiodicity, bursting, and possibly chaos, with a proposed mechanism involving manganese(iii) complex formation leading to oxidation to methyltartronic acid and Mn2+.
