Review
Thermodynamics
Jacob W. Martin, Maurin Salamanca, Markus Kraft
Summary: This review discusses the formation of carbonaceous nanoparticles from gas-phase molecules in hydrocarbon flames, highlighting both their useful applications and negative impacts as pollutants. Advances in experimental techniques have allowed for the direct observation of gas phase precursors and the transformation into nanoparticles over the past decade. Questions remain regarding the mechanisms leading to nanoparticle formation, with physically stabilised soot inception proposed as a potential middle ground combining physical and chemical routes.
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2022)
Article
Environmental Sciences
Hongxia Li, Qing Zhong, Xinru Wang, Fengjian Luo, Li Zhou, Hezhi Sun, Mei Yang, Zhengyun Lou, Zongmao Chen, Xinzhong Zhang
Summary: The degradation and metabolism of chlorfluazuron and flonicamid in tea from garden to cup were investigated. The study found that the risk of chlorfluazuron intake from tea was negligible, while the intake risk of flonicamid and its metabolites was higher.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Analytical
Hanqiang Zhang, Yufei Li, Feng Gan
Summary: In this study, reduced-state sulfur nanodots (r-SDs) with reducibility, satisfactory fluorescence properties, and high stability were synthesized for the sensitive and selective analysis of metal ions. The reduction property of SDs was discovered for the first time, and the detailed reduction mechanisms were investigated. The r-SDs showed in situ reduction of Au3+ to Au nanoparticles and also reduction of Fe3+ and Cu2+ to Fe2+ and Cu+, respectively. Hg2+ was selectively analyzed through dual-mode fluorescence and colorimetric probes, while Fe3+ and Cu2+ were quantitatively analyzed using specific recognition after reduction by r-SDs. The linear ranges and limits of detection for the different analytes were determined. Good recoveries were obtained for practical applications in environmental water samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Review
Food Science & Technology
Ying Zhou, Yunchuan He, Zengrong Zhu
Summary: This article reviews the research progress on chiral aroma compounds in tea. The formation and changes in the chiral configuration of tea aroma compounds during the entire life cycle of tea leaves have been studied in detail using GC-MS methods. The ratio of aroma chiral isomers varies among different tea varieties and finished teas. Enzymatic and non-enzymatic reactions play important roles in the formation and change of aroma compound chiral isomers during tea tree growth, tea processing, and storage.
FOOD RESEARCH INTERNATIONAL
(2023)
Article
Chemistry, Applied
Medhen W. Abebe, Richard Appiah Ntiamoah, Hern Kim
Summary: This study addresses the environmental concerns of current tea bags and in-cup decaffeination by synthesizing efficient and biodegradable alginate-chitosan hydrogel tea bags. The as-prepared hydrogel tea bags show a significant improvement in tea release efficiency and decaffeination compared to commercial tea bags.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Chemistry, Multidisciplinary
Yupeng Shi, Jingjing Liu, Yong Zhang, Jianfeng Bao, Jingliang Cheng, Changqing Yi
Summary: This study successfully prepared novel hybrid CDs with outstanding fluorescence properties and biocompatibility, which can be applied for dual measurement of iron ions with great potential applications in wastewater and living cells.
CHINESE CHEMICAL LETTERS
(2021)
Article
Environmental Sciences
Zihan Wang, Fengjian Luo, Mingming Guo, Jiawei Yu, Li Zhou, Xinzhong Zhang, Hezhi Sun, Mei Yang, Zhengyun Lou, Zongmao Chen, Xinru Wang
Summary: In this study, the metabolites of tolfenpyrad (TFP) in tea plants were identified and the transfer of TFP and its metabolites from tea bushes to consumption was studied for a comprehensive risk assessment. Four metabolites were identified and the dissipation and trends of TFP and its metabolites were examined during tea processing. The results showed that PT-CA posed a greater potential risk than TFP to tea consumers, suggesting the need to consider the sum of TFP and PT-CA residues as the maximum residual limit (MRL) in tea.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Jiafu Li, Md Tareq Aziz, Caroline O. Granger, Susan D. Richardson
Summary: The study found that residual chlorine in tap water used to boil tea can react with tea compounds to produce disinfection byproducts (DBPs), contributing to 12% of total DBPs in brewed tea. The total organic halogen in tea nearly doubled compared to tap water, with 96% of halogenated DBPs unknown, likely high-molecular-weight haloaromatic compounds. Identification and further research on these aromatic DBPs is recommended due to potential significant toxicity.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Marcela Rodrigues de Barros, Thais Meira Menezes, Yarima Sanchez Garcia, Jorge Luiz Neves
Summary: In this study, small iron-containing carbon nanocomposites showed efficient inhibition of tyrosinase activity. They quenched the fluorescence of tyrosinase through both static and dynamic mechanisms and exhibited tight binding to the enzyme. The nanocomposites also behaved as non-competitive inhibitors, with an inhibition efficiency 110 times higher than kojic acid.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Environmental Studies
Antonia Eastwood, Anke Fischer, Alice Hague, Katrina Brown
Summary: This study explores the influence of social relationships, networks, and power on land managers' decision-making, collaborative management, and policy change implementation in the Scottish national park. The findings highlight the key role of social relationships and networks in facilitating transformative change, but also their potential to consolidate the status quo and hinder change. The study suggests that personal relationships between agency staff and land managers can moderate polarization, while top-down collaborative groups and voluntary collaboration among like-minded estates can lead to further polarization.
Article
Chemistry, Multidisciplinary
Lucia Cardo, Lydia Martinez-Parra, Michele Cesco, Begona M. Echeverria-Beistegui, Marta Martinez-Moro, Natalia Herrero-Avarez, Marta-Beraza Cabrerizo, Susana Carregal-Romero, Pedro Ramos-Cabrer, Jesus Ruiz-Cabello, Maurizio Prato
Summary: Carbon Dots (CDs) are luminescent quasi-spherical nanoparticles with various applications. New gadolinium-doped CDs, Gd@CNDs, are presented as multifunctional probes for MRI. These Gd@CNDs show good homogeneity, stability, and biocompatibility, making them potential candidates for both MR and fluorescence imaging.
Article
Green & Sustainable Science & Technology
Elizaveta Novoradovskaya, Barbara Mullan, Penelope Hasking, Hannah Velure Uren
Summary: Approximately 16 billion paper coffee cups are thrown away globally each year. One effective solution is the use of reusable hot drink cups. An intervention on an Australian University campus successfully increased the use of reusable cups, with findings suggesting a relationship between habit strength and intolerance of uncertainty.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Multidisciplinary
Zach Sheffield, Maha Alafeef, Parikshit Moitra, Priyanka Ray, Dipanjan Pan
Summary: This study reports a method for highly specific molecular aggregation using carbon dots and complementary antisense oligonucleotide sequences in the presence of SARS-CoV-2 RNA. The sensor can differentiate between different coronaviruses and has high detection sensitivity.
Article
Engineering, Environmental
Ning Xie, Haiming Wang, Changfu You
Summary: In this study, the adsorption mechanism of Pb2+ on carbonaceous surfaces modified with oxygen functional groups was investigated using density functional theory. It was found that the introduction of oxygen functional groups significantly enhanced the adsorption of Pb2+ on the armchair surface, changing the adsorption mechanism from physisorption to chemisorption.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Analytical
Lingxiao Wang, Long Yu, Hongwei Ge, Yiming Bu, Mingtai Sun, Dejian Huang, Suhua Wang
Summary: This study reports the design of a novel dual-mode reversible probe based on amorphous carbon nanodots, which can simultaneously achieve colorimetric and fluorometric detection of mercury and glutathione. The probe can effectively analyze mercury and glutathione in different water samples.
MICROCHEMICAL JOURNAL
(2022)
