Article
Materials Science, Multidisciplinary
B. Bhagat, V. Jadeja, P. Sharma, R. Bandyopadhyay, K. Mukherjee
Summary: This study presents a simple colorimetric method using glycine for detecting Cu(II) in water. The color change caused by glycine allows for visual detection of Cu(II) concentration, while UV-vis spectroscopy is used to estimate the formation constant of Cu(II)-glycine complex. Image analysis algorithms based on RGB profiles can differentiate the color of Cu(II)/glycine solutions, suggesting new possibilities for quantitative estimation of Cu(II) solutions.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Julian Klein, Laura Kampermann, Benjamin Mockenhaupt, Malte Behrens, Jennifer Strunk, Gerd Bacher
Summary: The Tauc plot is a widely used method for determining the optical gap of amorphous semiconductors. It has also been modified to study direct and indirect interband transitions in (poly-) crystalline semiconductors. Despite its popularity, the Tauc plot should be used with caution due to the variability in electronic structure.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Medicine, Legal
Rohini Chauhan, Raj Kumar, Vijay Kumar, Kashma Sharma, Vishal Sharma
Summary: The derivative diffuse reflectance UV-vis-NIR spectroscopy combined with multivariate methods were used to discriminate and classify soil samples from north-western India. Different organic and inorganic minerals were identified in varying amounts, with peak comparison and chemometric methods such as PCA being effective in differentiating samples. The PCA model was validated by analyzing unknown samples and achieved 95% accurate clustering of soil samples.
FORENSIC SCIENCE INTERNATIONAL
(2021)
Article
Chemistry, Analytical
Cagri Cavdaroglu, Banu Ozen
Summary: Spectroscopic methods were used to predict quality and chemical parameters of vinegar processing, with accurate models obtained for most quality parameters through a combination of two spectroscopic datasets.
MICROCHEMICAL JOURNAL
(2021)
Review
Chemistry, Applied
Gurleen Singh, Nancy George, Riddima Singh, Gurjaspreet Singh, Sushma, Gurpreet Kaur, Harminder Singh, Jandeep Singh
Summary: This review focuses on the 1,2,3-triazole-based sensor probes synthesized selectively by CuAAC, which have the ability to detect single or multiple ions under specific conditions. The review also discusses the techniques and sensing mechanisms involved in ion detection using chemosensor probes.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Gordon Brezicki, Jonathan Zheng, Christopher Paolucci, Robert Schloegl, Robert J. Davis
Summary: This study demonstrates that the identity of the co-cation (H vs Na) significantly influences the Cu speciation and reactivity in Cu-MOR and Cu-ZSM-S catalysts. The choice of co-cation can be used to control active site structure and affect the selectivity of methane conversion to methanol.
Article
Biochemical Research Methods
Prisco Prete, Davide Iannaccone, Antonio Proto, Marek Tobiszewski, Raffaele Cucciniello
Summary: A new spectrophotometric method for the determination of Cu2+ in different water matrices was proposed using tetrasodium iminodisuccinate (IDS) as a bio-based organic ligand. The method showed a linear range of 6.3-381 mg L-1 and a limit of detection (LOD) of 1.43 mg L-1. The recovery data from spiked analysis of water samples confirmed the feasibility of this method for Cu2+ analysis in natural conditions. The proposed method was also found to have lower environmental impact compared to the reference method, making it suitable for Cu2+ analysis in water matrices.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Spectroscopy
Smita Verma, Velayutham Ravichandiran, Nihar Ranjan
Summary: A selective fluorescence sensor for carbonate ions has been developed in this study, which can rapidly detect low concentrations of carbonate ions. Experimental results demonstrate direct interaction between the sensor and carbonate ions, with potential implications for disease prevention and toxicity assessment.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Medicinal
Linfeng Wu, Brian R. Morrow, Mary M. Jefferson, Feng Li, Liang Hong
Summary: Novel collagen composite membranes with antibacterial function were successfully prepared in this study for guided tissue regeneration or wound dressing applications.
JOURNAL OF PHARMACEUTICAL SCIENCES
(2021)
Article
Chemistry, Inorganic & Nuclear
Kiyoshi Fujisawa, Aoba Yamada, Moeka Koyama, David James Young
Summary: Tridentate, planar nitrogen containing ligands based on pyridine and pyrazoles were synthesized and their solid-state structures were analyzed. Copper(II) chlorido and trifluoromethanesulfonato complexes were formed with these ligands and their coordination geometries were studied. The UV-Vis spectra of the complexes showed pi-pi* transition band red-shift and d-d transition bands at similar energy, indicating structural changes in the solution-state. EPR spectroscopy supported the findings.
INORGANICA CHIMICA ACTA
(2023)
Article
Chemistry, Physical
Qingli Zou, Yue Sun, Zhuojian Liang, Wanwan Wang, Yi-Chun Lu
Summary: Magnesium-sulfur batteries offer higher theoretical volumetric energy density and lower cost compared to lithium-sulfur batteries, but suffer from poor cycle life and low energy efficiency. By increasing polysulfide solubility with high-donor-number solvents like dimethyl sulfoxide (DMSO), the discharge capacity and sulfur overpotential can be improved, leading to higher performance and reversible cycling.
ADVANCED ENERGY MATERIALS
(2021)
Article
Environmental Sciences
Yujie Zhang, Shikang Wu, Peizhe Sun
Summary: Determining the conditional stability constant (Kcond) is crucial for assessing the stability of Fe(III) complexes in surface water and wastewater. This study evaluated existing methods of Kcond determination and proposed a novel UV-Vis spectroscopy method. The results showed that Fe(III)-EDTA had the highest logKcond value (7.08), followed by Fe(III)-NTA (4.67), Fe(III)-OA (4.32), Fe(III)-TTC (4.28), and Fe(III)-Kana (3.07). The method was also applied to Fe(III) complexation with humic acid (HA), yielding a logKcond value of 5.02 M-1. The proposed methodology demonstrated satisfactory measurement capability for a wide range of complexes (103 to 107 M-1). Insights into the impact of Fe(III) complexes in water matrices can be gained using this method.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Narayan Sinha, Juan-Ramon Jimenez, Bjorn Pfund, Alessandro Prescimone, Claude Piguet, Oliver S. Wenger
Summary: By combining pi-donating amido with pi-accepting pyridine coordination units in a tridentate chelate ligand, a strong nephelauxetic effect was achieved in a homoleptic Cr-III complex, shifting its luminescence to the NIR-II spectral range. This study focuses on increasing metal-ligand bond covalence to shift the ruby-like E-2 emission of Cr-III to 1067 nm at 77 K, taking a fundamentally different approach from previous ligand design strategies.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Analytical
Ismail Tarhan
Summary: A new method for quantifying squalene in amaranth seed oil was proposed using spectroscopic techniques and partial least square calibration models. The best calibration model was obtained from FTIR spectroscopy with normal spectra, showing low RMSEC and high R-square values. The study demonstrated that FTIR spectroscopy coupled with PLS regression is an effective and environmentally friendly way to quantify squalene in ASO samples.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Physical
Timur Khamidullin, Shamil Galyaltdinov, Alina Valimukhametova, Vasiliy Brusko, Artur Khannanov, Stefan Maat, Irina Kalinina, Ayrat M. Dimiev
Summary: A new, cost-effective separation method for carbon nanotubes is proposed in this work, allowing for industrial-scale processing of single-walled carbon nanotubes. The method involves passing a surfactant solution of unsorted CNTs through a column filled with chemically modified cotton wool, resulting in two fractions enriched with semiconductor and metallic CNTs, respectively. The separated fractions are fully characterized using various spectroscopic techniques.
Article
Chemistry, Applied
M. Graca Dias, Elsa Vasco, Francisco Ravasco, Lufsa Oliveira
Summary: This study estimated the vitamin D intake of "adults" and "elderly" populations in Portugal using the TDS methodology. The results showed that the majority of people had inadequate vitamin D intake, well below the Dietary Reference Values.
Article
Chemistry, Applied
Yanan Wang, Jiachen Shi, Yong-Jiang Xu, Chin-Ping Tan, Yuanfa Liu
Summary: This study investigates the variations in lipid digestion profiles among individuals of different ages using in vitro digestion models. The findings suggest that adults have a more comprehensive lipid digestion compared to infants, and infants tend to release shorter chain length and more saturated free fatty acids during digestion. Additionally, the particle sizes in the stomach of the elderly were consistently larger. This study enhances our understanding of how lipids with different degrees of unsaturation undergo digestion in diverse age groups.
Article
Chemistry, Applied
Hyunjong Yu, Huisu Kim, Pahn-Shick Chang
Summary: Chitosan-pectin emulsion-filled hydrogel (EFH) was developed to enhance the bioaccessibility of lipophilic bioactive compounds through intestinal delivery. The EFH, prepared without crosslinking agents, demonstrated improved mechanical strength and compactness with higher pectin concentration. It retained the emulsion at pH 2.0 and released it at pH 7.4, resulting in enhanced release of free fatty acids and improved bioaccessibility of curcumin.
Article
Chemistry, Applied
Tongze Zhang, Siqi Hong, Jia-Rong Zhang, Pin-He Liu, Siyi Li, Zixian Wen, Jianwei Xiao, Guirong Zhang, Olivier Habimana, Nagendra P. Shah, Zhongquan Sui, Harold Corke
Summary: Lactic acid fermentation significantly affects the morphology and physicochemical properties of proso millet starch, including the formation of surface indentations and small pores, decrease in gelatinization temperatures, and changes in hardness and adhesiveness.
Article
Chemistry, Applied
Liqin Kong, Feng Hong, Peng Luan, Yiping Chen, Yaoze Feng, Ming Zhu
Summary: This study presents a novel impedance biosensor using composite nanomaterials and T1R1 as a signal probe, which can competitively and ultra-sensitively detect umami intensity. The biosensor exhibits exceptional analytical performance and is suitable for food flavor evaluation.
Article
Chemistry, Applied
Kunying Lv, Yixin Yang, Qilong Li, Ran Chen, Liang Deng, Yiwei Zhang, Ning Jiang
Summary: Horse's milk, with its high nutritional value and low allergenic proteins, could be a substitute for cow's milk in infant consumption. A proteomic method was used to identify and compare milk fat globule membrane (MFGM) and whey proteins from different horse breeds. The study found differences in protein composition and functionality, which could support the development of formulas more suitable for human infants.
Article
Chemistry, Applied
Enrique Jacobo Diaz-Montana, Helene Brignot, Ramon Aparicio-Ruiz, Thierry Thomas- Danguin, Maria Teresa Morales
Summary: Sensory perception of virgin olive oil is influenced by phenols and volatiles, which are affected by the composition of the oil and biological factors. This study investigated the effect of saliva and phenols on the release of volatiles, and found that the presence of phenols decreased the release of saturated volatiles.
Article
Chemistry, Applied
Wei Zhou, Rui Zhang, Zhen Cai, Fangfang Wu, Yong Hu, Chao Huang, Kun Hu, Yun Chen
Summary: Environmentally friendly and outstanding pH-responsive cationic starch nanoparticles (CSNP) were prepared from pH-sensitive starch. CSNP exhibited nanosize and regular sphere, highly free-flowing molecular chains, and demonstrated excellent pH responsiveness through multiple emulsion/demulsification transitions.
Article
Chemistry, Applied
Andrea Koo, Vinayak Ghate, Weibiao Zhou
Summary: This study suggests that direct seeding may negatively affect the nutritional quality of crops, causing a decrease in ascorbic acid, vitamin K, and total glucosinolate content.
Article
Chemistry, Applied
Tonghao Du, Yazhou Xu, Xiaoyan Xu, Shijin Xiong, Linli Zhang, Biao Dong, Jinqing Huang, Tao Huang, Muyan Xiao, Tao Xiong, Mingyong Xie
Summary: This study successfully improved the ACE inhibitory activity of black sesame seeds by fermenting them with Lactobacillus Plantarum NCU116 and hydrolyzing them using acid protease. The RF-PSO model was used to predict the ACE inhibitory activity during the hydrolysis process. Eight peptides with ACE inhibitory activity were identified from fermented black sesame seed hydrolysates after separation and screening.
Article
Chemistry, Applied
Yao Liu, Songyi Lin, Kexin Liu, Shan Wang, Qiaozhen Liu, Na Sun
Summary: This study analyzed the structural changes of shrimp proteins during digestion, predicted the immunodominant epitopes, and validated their allergenicity. The results showed that shrimp proteins were degraded into peptides during digestion, but still carried IgE epitopes that trigger allergic reactions.
Article
Chemistry, Applied
Tiantian Fu, Hongwei Cao, Yu Zhang, Xiao Guan
Summary: This study investigates the impact of milling on the active components in rice, with a focus on the stability and bioaccessibility of phenols, VB1, and alpha-GABA during cooking and digestion. The findings show that milling exacerbates the instability of gamma-GABA during cooking and VB1 during digestion, and it affects the bioaccessibility of these active compounds.
Article
Chemistry, Applied
Zhihao Yang, Yanru Hou, Min Zhang, Puxin Hou, Chang Liu, Lu Dou, Xiaoyu Chen, Lihua Zhao, Lin Su, Ye Jin
Summary: This study investigated the molecular mechanism of feeding regimes on lamb flavor by using TMT labeling combined with MS. The results showed that pasture-fed groups had higher levels of amino acids and volatile flavor substances compared to concentrate-fed groups. Additionally, several differentially abundant proteins associated with lamb flavor were identified.
Article
Chemistry, Applied
Zixuan Xie, De Zhang, Junyu Zhu, Qianqian Luo, Jun Liu, Jingtao Zhou, Xiaoyong Wang, Yuqiong Chen, Zhi Yu, Dejiang Ni
Summary: This study investigated the acidification of aroma-enhanced black tea during storage. Analysis of non-volatile substances and organic acids using UPLC-Q-TOF/MS and HPLC revealed a decrease in soluble sugars and amino acids, while an increase in organic acids such as oxalic acid, malic acid, and quinic acid. In vitro experiments further demonstrated that the acidification is a result of the decomposition of sugars and amino acids by heating, as well as the oxidation of aromatic aldehydes. Additionally, the study showed that the taste composition of tea infusion is altered, with reduced amino acids, catechins, soluble sugars, and flavonoids. This research provides a theoretical basis for improving the quality of black tea.
Article
Chemistry, Applied
Lin Wang, Falai Ma, Zihan Li, Yan Zhang
Summary: This study developed time-temperature integrators based on amyloglucosidase@Cu3(PO4)2 nanoflowers for monitoring the freshness of chilled pork. The results showed that the integrators were highly reliable and accurate in predicting the quality of chilled pork.