325,539 results match your criteria Chemical Engineering & Technology[Journal]


The recent challenges of highly contagious COVID-19; causing respiratory infections: symptoms, diagnosis, transmission, possible vaccines, animal models and immunotherapy.

Chem Biol Drug Des 2020 Jul 12. Epub 2020 Jul 12.

Department of medicinal chemistry, National University of Pharmacy, Pushkinska str. 53, Kharkiv, 61002, Ukraine.

COVID-19 is highly contagious pathogenic viral infection initiated from Wuhan seafood wholesale market of China on December 2019 and spread rapidly around the whole world due to onward transmission. This recent outbreak of novel coronavirus (CoV) was believed to be originated from bats and causing respiratory infections such as common cold, dry cough, fever, headache, dyspnea, pneumonia and finally Severe Acute Respiratory Syndrome (SARS) in humans. For this widespread zoonotic virus, human-to-human transmission has resulted in nearly 83 lakh cases in 213 countries and territories with 4,50,686 deaths as on 19th June 2020. Read More

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http://dx.doi.org/10.1111/cbdd.13761DOI Listing

Electrochemical sensor based on CuSe for determination of dopamine.

Mikrochim Acta 2020 Jul 11;187(8):440. Epub 2020 Jul 11.

Department of Chemistry, Missouri University of Science & Technology, Rolla, MO, 65409, USA.

A simple binary copper selenide, CuSe nanostructure, has been investigated as electrochemical sensor for dopamine detection. The hydrothermally synthesized and electrodeposited CuSe nanostructures showed high sensitivity for dopamine detection with low limit of detection (LOD). A sensitivity of 26 μA/μM. Read More

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http://dx.doi.org/10.1007/s00604-020-04405-5DOI Listing

A ROS responsive nanomedicine with enhanced photodynamic therapy via dual mechanisms: GSH depletion and biosynthesis inhibition.

J Photochem Photobiol B 2020 Jul 5;209:111955. Epub 2020 Jul 5.

College of Chemistry and Materials Science, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing, Jiangsu 210023, China; School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China. Electronic address:

Reduced glutathione (GSH, containing sulfydryl) inside cancer cells strongly consumes reactive oxygen species (ROS) in photodynamic therapy (PDT) process to reduce PDT effect. Thiol-ene click reaction is a classic method to couple sulfydryl and alkene groups. However, little effort was dedicated to developing medicines for GSH depletion based on this reaction. Read More

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http://dx.doi.org/10.1016/j.jphotobiol.2020.111955DOI Listing

Weak hydrogen bonds between alkyl halides and amides: The microwave spectroscopic and theoretical study of the difluoromethane⋯formamide complex.

Spectrochim Acta A Mol Biomol Spectrosc 2020 Jul 2;241:118681. Epub 2020 Jul 2.

School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331 Chongqing, China. Electronic address:

The pure rotational spectrum of the complex of difluoromethane with formamide was investigated by means of microwave spectroscopy supplemented with theoretical calculations. The hyperfine structure arising from the N nuclear quadrupole coupling effect was completely resolved. The most stable isomer that displays the C symmetry with the ∠HCH angle of difluoromethane being bisected by the ab-plane of formamide was detected. Read More

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http://dx.doi.org/10.1016/j.saa.2020.118681DOI Listing

Simultaneous determination of taxoids and flavonoids in twigs and leaves of three Taxus species by UHPLC-MS/MS.

J Pharm Biomed Anal 2020 Jul 2;189:113456. Epub 2020 Jul 2.

Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, 150040, PR China; Engineering Research Center of Forest Bio-Preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, PR China; College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, 150040, PR China.

Taxus species are highly concerned due to the presence of anticancer taxoids (especially paclitaxel) and health beneficial flavonoids. For the first time, an UHPLC-MS/MS method was developed for the simultaneous determination of seven taxoids and seven flavonoids in twigs and leaves of three Taxus species. The satisfactory separation of fourteen target compounds was achieved within 5 min of running time on an Agilent ZORBAX Eclipse Plus C18 column (50 mm × 2. Read More

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http://dx.doi.org/10.1016/j.jpba.2020.113456DOI Listing

Advances in G protein-coupled receptor high-throughput screening.

Curr Opin Biotechnol 2020 Jul 9;64:210-217. Epub 2020 Jul 9.

School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, United States; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, United States. Electronic address:

G protein-coupled receptors (GPCRs) detect compounds on the cell surface and are the starting point of a number of medically relevant signaling cascades. Indeed, over 30% of FDA approved drugs target GPCRs, making them a primary target for drug discovery. Computational and experimental high-throughput screening (HTS) approaches of clinically relevant GPCRs are a first-line drug discovery effort in biomedical research. Read More

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http://dx.doi.org/10.1016/j.copbio.2020.06.004DOI Listing

Characterisation of aluminium black dross before and after stepwise salt-phase dissolution in non-aqueous solvents.

J Hazard Mater 2020 Jun 30;401:123351. Epub 2020 Jun 30.

Department of Chemical & Biological Engineering, University of Sheffield, Sheffield, South Yorkshire, S1 3JD, United Kingdom.

Aqueous leaching to recover salts from black dross is accompanied by hazardous gas generation. The gas-generating phases vary significantly across differently sourced black dross. The challenge for the industry is how to accurately qualify and quantify the problematic components of black dross, especially minor reactive phases. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123351DOI Listing

CoO-3D ordered mesoporous carbon nitride (CoO@mpgCN) composite as peroxymonosulfate activator for the degradation of sulfamethoxazole in water.

J Hazard Mater 2020 Jun 26;401:123326. Epub 2020 Jun 26.

Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, City, Taiwan. Electronic address:

A facile impregnation method was used to fabricate a hybrid CoO-3D ordered mesoporous carbon nitride (CoO@mpgCN) catalyst that effectively activated peroxymonosulfate (PMS) for the degradation of pharmaceutical chemical, exemplified by antibiotic sulfamethoxazole (SMX) in aqueous solutions. The CoO@mpgCN/PMS system exhibited high catalytic reactivity and SMX removal efficiency over a wide pH range with an observed rate constant (k) of 0.314 min. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123326DOI Listing

Parental exposure to the synthetic estrogen 17α-ethinylestradiol (EE2) affects offspring development in the Sydney rock oyster, Saccostrea glomerata.

Environ Pollut 2020 Jul 3;266(Pt 1):114994. Epub 2020 Jul 3.

School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW 2308, Australia. Electronic address:

Very little is currently known regarding the effects of estrogenic endocrine disrupting chemicals on embryonic and larval development in molluscs, nor the potential effects of parental (F) exposure on resultant F offspring. In this study, we assessed the embryotoxic impacts of exposure to environmentally relevant concentrations of the synthetic estrogen, 17α-ethinylestradiol (EE2), to male and female parents (50 ng/L) and their offspring (5 and 50 ng/L) in the native Australian Sydney rock oyster, Saccostrea glomerata. There were no detectable effects of parental exposure on fertilisation success, proportions of early larval (F) morphs and unfertilised eggs. Read More

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http://dx.doi.org/10.1016/j.envpol.2020.114994DOI Listing

Impact of quarantine measures on chemical compositions of PM during the COVID-19 epidemic in Shanghai, China.

Sci Total Environ 2020 Jul 6;743:140758. Epub 2020 Jul 6.

Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Department of Environmental Science & Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Institute of Eco-Chongming (IEC), 20 Cuiniao Rd., Chenjia Zhen, Chongming, Shanghai 202162, China. Electronic address:

The COVID-19 epidemic broke out in Wuhan, Hubei in December 2019 and in January 2020 and was later transmitted to the entire country. Quarantine measures during Chinese New Year effectively alleviated the spread of the epidemic, but they simultaneously resulted in a decline in anthropogenic emissions from industry, transportation, and import and export of goods. Herein, we present the major chemical composition of non-refractory PM (NR-PM) and the concentrations of gaseous pollutants in an urban site in Shanghai before and during the quarantine period of the COVID-19 epidemic, which was Jan. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140758DOI Listing

Cr(VI) visualization via transmittance of electrorheological display medium with core/shell polystyrene/polyvinyltetrazole microspheres.

Sci Total Environ 2020 Jul 2;743:140676. Epub 2020 Jul 2.

Department of Materials and Science Engineering, National Taiwan University of Science and Technology, 43, Sec. 4, Keelung Road, Taipei 106, Taiwan; R&D Center for Membrane Technology, Chung Yuan Christian University, Chungli, Taoyuan 32043, Taiwan. Electronic address:

In the course of time, significant amounts of heavy-ion pollutants have been dispersed into the environment. Rapid on-site detection of heavy metal ions is crucial to monitor their dispersion in the nascent stages. In this study, 2. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140676DOI Listing

The impact of ultrasonic treatment on blueberry wine anthocyanin color and its In-vitro anti-oxidant capacity.

Food Chem 2020 Jul 5;333:127455. Epub 2020 Jul 5.

Department of Food Science and Engineering, Institute of Food Safety and Nutrition, Guangdong Engineering Technology Center of Food Safety Molecular Rapid Detection, Jinan University, Guangzhou 510632, PR China. Electronic address:

Ultrasound (US) has been recognized as a non-thermal technology for accelerating blueberry wine aging for flavor development. However, influence of US on anthocyanin and color characteristics is uncertain. In this study, US was applied to new blueberry wine, and changes in color characteristics, anthocyanin content and anti-oxidant capacity were evaluated at early stage of aging period. Read More

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http://dx.doi.org/10.1016/j.foodchem.2020.127455DOI Listing

Exopolysaccharide produced by the potential probiotic Lactococcus garvieae C47: Structural characteristics, rheological properties, bioactivities and impact on fermented camel milk.

Food Chem 2020 Jul 4;333:127418. Epub 2020 Jul 4.

Food Science Department, College of Food and Agriculture, United Arab Emirates University (UAEU), Al Ain, United Arab Emirates.

Fermented camel milk possesses a weak (liquid-like) gel structure. We aimed to 1) investigate the characteristics, bioactivities and rheological properties of the exopolysaccharide (EPS) produced by Lactococcus garvieae-C47 (exopolysaccharide-C47 product), a potential probiotic bacterium, on milk extracted from camels and 2) examine the rheological properties of the fermented camel milk produced by L. garvieae-C47. Read More

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http://dx.doi.org/10.1016/j.foodchem.2020.127418DOI Listing

Effects of osmolytes on salt resistance of Halomonas socia CKY01 and identification of osmolytes-related genes by genome sequencing.

J Biotechnol 2020 Jul 9. Epub 2020 Jul 9.

Department of Biological Engineering, College of Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, South Korea; Institute for Ubiquitous Information Technology and Applications, Konkuk University, Seoul 143-701, South Korea. Electronic address:

Bacteria from the genus Halomonas hold promise in biotechnology as sources of salt-tolerant enzymes, biosurfactants, biopolymers, osmolytes, and as actors in bioremediation processes. In a previous work, we have identified Halomonas socia strain CKY01 having various hydrolase activities. Here, we aimed to study the survival strategies of marine bacteria. Read More

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http://dx.doi.org/10.1016/j.jbiotec.2020.07.006DOI Listing

Efficient solid-state fermentation for the production of 5-aminolevulinic acid enriched feed using recombinant Saccharomyces cerevisiae.

J Biotechnol 2020 Jul 9. Epub 2020 Jul 9.

Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering of Ministry of Education, SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China. Electronic address:

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http://dx.doi.org/10.1016/j.jbiotec.2020.06.001DOI Listing

Characterization of heparin and severe acute respiratory syndrome-related coronavirus 2 (SARS-CoV-2) spike glycoprotein binding interactions.

Antiviral Res 2020 Jul 9:104873. Epub 2020 Jul 9.

Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, Troy, New York, United States of America; Department of Chemical and Biological Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York, United States of America; Department of Biological Science, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York, United States of America; Biomedical Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York, United States of America. Electronic address:

Severe acute respiratory syndrome-related coronavirus 2 (SARS-CoV-2) has resulted in a pandemic and continues to spread around the globe at an unprecedented rate. To date, no effective therapeutic is available to fight its associated disease, COVID-19. Our discovery of a novel insertion of glycosaminoglycan (GAG)-binding motif at S1/S2 proteolytic cleavage site (681-686 (PRRARS)) and two other GAG-binding-like motifs within SARS-CoV-2 spike glycoprotein (SGP) led us to hypothesize that host cell surface GAGs may interact SARS-CoV-2 SGPs to facilitate host cell entry. Read More

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http://dx.doi.org/10.1016/j.antiviral.2020.104873DOI Listing

Structural analysis of a glucoglucuronan derived from laminarin and the mechanisms of its anti-lung cancer activity.

Int J Biol Macromol 2020 Jul 9. Epub 2020 Jul 9.

College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China. Electronic address:

Laminarin (LA), a storage glucan, was purified from the brown alga Sargassum thunbergii. After specific oxidation using the stable nitroxyl radical, 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), together with NaBr and NaClO, glucoglucuronan (LAO) was obtained. Compositional analysis of LAO showed a molar ratio of glucuronic acid (GlcA) to glucose (Glc) of 12. Read More

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http://dx.doi.org/10.1016/j.ijbiomac.2020.07.069DOI Listing

Pollution sources of atmospheric fine particles and secondary aerosol characteristics in Beijing.

J Environ Sci (China) 2020 Sep 16;95:91-98. Epub 2020 Apr 16.

School of Municipal and Environmental Engineering, Co-Innovation Center for Green Building of Shandong Province, Shandong Jianzhu University, Jinan 250101, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China. Electronic address:

To investigate the secondary formation and pollution sources of atmospheric particles in urban Beijing, PM and its chemical components were collected and determined by URG-9000D ambient ion monitor (AIM) from March 2016 to January 2017. Among water-soluble ions (WSIs), NO, SO and NH (SNA) had the largest proportion (77.8%) with the total concentration of 23. Read More

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http://dx.doi.org/10.1016/j.jes.2020.04.002DOI Listing
September 2020

Relationships between chemical elements of PM and O in Shanghai atmosphere based on the 1-year monitoring observation.

J Environ Sci (China) 2020 Sep 29;95:49-57. Epub 2020 Apr 29.

School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China. Electronic address:

Mass level of fine particles (PM) in main cities in China has decreased significantly in recent years due to implementation of Chinese Clean Air Action Plan since 2013, however, O pollution is getting worse than before, especially in megacities such as in Shanghai. In this work, O and PM were continuously monitored from May 27, 2018 to March 31, 2019. Our data showed that the annual average concentration of PM and O (O-8 hr, maximum 8-hour moving average of ozone days) was 39. Read More

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http://dx.doi.org/10.1016/j.jes.2020.03.043DOI Listing
September 2020

Studies on relationships between air pollutants and allergenicity of Humulus Scandens pollen collected from different areas of Shanghai.

J Environ Sci (China) 2020 Sep 30;95:43-48. Epub 2020 Apr 30.

School of Science and Engineering, Saitama University, Saitama 338-8570, Japan.

Pollen pollution and allergy are becoming prominent issues in China. However, few studies on pollinosis have been reported. As an allergen in the atmosphere, allergenic Humulus scandens pollen was collected from four districts of Shanghai, including Wusong (WS), Jiading (JD), Xujiahui (XJH) and Songjiang (SJ). Read More

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http://dx.doi.org/10.1016/j.jes.2020.03.037DOI Listing
September 2020

Vertical profiles of biogenic volatile organic compounds as observed online at a tower in Beijing.

J Environ Sci (China) 2020 Sep 1;95:33-42. Epub 2020 May 1.

State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.

Vertical profiles of isoprene and monoterpenes were measured by a proton transfer reaction-time of flight-mass spectrometry (PTR-ToF-MS) at heights of 3, 15, 32, 64, and 102 m above the ground on the Institute of Atmospheric Physics (IAP) tower in central Beijing during the winter of 2016 and the summer of 2017. Isoprene mixing ratios were larger in summer due to much stronger local emissions whereas monoterpenes were lower in summer due largely to their consumption by much higher levels of ozone. Isoprene mixing ratios were the highest at the 32 m in summer (1. Read More

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http://dx.doi.org/10.1016/j.jes.2020.03.032DOI Listing
September 2020

Sources and health risks of PM-bound polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) in a North China rural area.

J Environ Sci (China) 2020 Sep 7;95:240-247. Epub 2020 May 7.

Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China; Shanghai Institute of Eco-Chongming (SIEC), Shanghai 200062, China. Electronic address:

Polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) are typical persistent organic pollutants (POPs), which have high toxicity, bioaccumulation and long-distance transfer capability. Daily variation, sources of PCBs and OCPs in PM are rarely explored in polluted rural area. Here, the sources and health risks of the PCBs and OCPs were evaluated for 48 PM samples collected in winter 2017 in Wangdu, a heavy polluted rural area in the North China Plain. Read More

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http://dx.doi.org/10.1016/j.jes.2020.03.051DOI Listing
September 2020

Kinetic and mechanism studies of the ozonolysis of three unsaturated ketones.

J Environ Sci (China) 2020 Sep 1;95:23-32. Epub 2020 May 1.

Institute of Chemical Physics, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China.

Reaction rate constants and products of 1-octen-3-one, 3-octen-2-one and 4-hexen-3-one with ozone were studied in a 100-L fluorinated ethylene propylene (FEP) Teflon film bag using absolute rate method at 298 ± 1 K and atmospheric pressure. The rate constants were (1.09 ± 0. Read More

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http://dx.doi.org/10.1016/j.jes.2020.03.031DOI Listing
September 2020

Cause of PM pollution during the 2016-2017 heating season in Beijing, Tianjin, and Langfang, China.

J Environ Sci (China) 2020 Sep 7;95:201-209. Epub 2020 May 7.

Chinese Research Academy of Environmental Sciences, Beijing 100012, China.

To investigate the cause of fine particulate matter (particles with an aerodynamic diameter less than 2.5 µm, PM) pollution in the heating season in the North China Plain (specifically Beijing, Tianjin, and Langfang), water-soluble ions and carbonaceous components in PM were simultaneously measured by online instruments with 1-hr resolution, from November 15, 2016 to March 15, 2017. The results showed extreme severity of PM pollution on a regional scale. Read More

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http://dx.doi.org/10.1016/j.jes.2020.03.024DOI Listing
September 2020

Response to Grygar (2020) comments on "Potential phytomanagement of military polluted sites and biomass production using biofuel crop miscanthus x giganteus"- Pidlisnyuk et al. (2019). Environmental pollution, 261: 113038.

Environ Pollut 2020 Jun 20:115037. Epub 2020 Jun 20.

Department of Physical, Analytical and General Chemistry, National University "Lvivska Polytechnika", Sv. Yura square 9, 79013, Lviv, Ukraine. Electronic address:

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http://dx.doi.org/10.1016/j.envpol.2020.115037DOI Listing

Induction of ferroptosis in response to graphene quantum dots through mitochondrial oxidative stress in microglia.

Part Fibre Toxicol 2020 Jul 11;17(1):30. Epub 2020 Jul 11.

Key Laboratory of Environmental Medicine and Engineering, Ministry of Education; School of Public Health, Southeast University, Nanjing, 210009, P. R. China.

Background: Graphene quantum dots (GQDs) provide a bright prospect in the biomedical application because they contain low-toxic compounds and promise imaging of deep tissues and tiny vascular structures. However, the biosafety of this novel QDs has not been thoroughly evaluated, especially in the central nervous system (CNS). The microarray analysis provides a hint that nitrogen-doped GQDs (N-GQDs) exposure could cause ferroptosis in microglia, which is a novel form of cell death dependent on iron overload and lipid peroxidation. Read More

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http://dx.doi.org/10.1186/s12989-020-00363-1DOI Listing

Keras R-CNN: library for cell detection in biological images using deep neural networks.

BMC Bioinformatics 2020 Jul 11;21(1):300. Epub 2020 Jul 11.

The Broad Institute, Cambridge, MA, USA.

Background: A common yet still manual task in basic biology research, high-throughput drug screening and digital pathology is identifying the number, location, and type of individual cells in images. Object detection methods can be useful for identifying individual cells as well as their phenotype in one step. State-of-the-art deep learning for object detection is poised to improve the accuracy and efficiency of biological image analysis. Read More

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http://dx.doi.org/10.1186/s12859-020-03635-xDOI Listing

The Interaction of Isoflavone Phytoestrogens with ERα and ERβ by Molecular Docking and Molecular Dynamics Simulations.

Curr Comput Aided Drug Des 2020 Jul 12. Epub 2020 Jul 12.

School of Pharmacy Lanzhou University, P.O. Box: 730000, Lanzhou. China.

Aim And Objective: Isoflavone phytoestrogens, which commonly present in natural plants, are closely related to human health. The combination of them with estrogen receptors in the body can play a more important role in the prevention and treatment of cardiovascular diseases, cancer, and menopausal diseases. This research is conducted for the wider application of isoflavone phytoestrogens in various fields. Read More

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http://dx.doi.org/10.2174/1573409916666200712140245DOI Listing

Enzyme Instructed Self-assembly of Naphthalimide-dipeptide: Spontaneous Transformation from Nanosphere to Nanotubular Structures that Induces Hydrogelation.

Chem Asian J 2020 Jul 11. Epub 2020 Jul 11.

National Chiao Tung University, Materials Science and Engineering, 1001 University Rd., 30010, Hsinchu, TAIWAN.

Understanding the structure-morphology relationships of the self-assembled nanostructures is very crucial for developing the materials with the desired chemical and biological functions. Here, phosphate-based naphthalimide (NI) derivatives have been developed for the first time to study the enzyme instructed self-assembly process. Self-assembly of simple amino acid derivative NI-Y p resulted in non-specific amorphous aggregates in the presence of alkaline phosphatase enzyme. Read More

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http://dx.doi.org/10.1002/asia.202000575DOI Listing

Tuning Electrical- and Photo-Conductivity by Cation Exchange within a Redox-Active Tetrathiafulvalene-Based Metal-Organic Framework.

Angew Chem Int Ed Engl 2020 Jul 11. Epub 2020 Jul 11.

Nanjing University, School of Chemistry and Chemical Engineering, Han Kou Road 22, 210093, Nanjing, CHINA.

To activate electronic and optical functions of the redox-active metal-organic framework, (Me 2 NH 2 )[In III (TTFTB)]·0.7C 2 H 5 OH· DMF (Me 2 NH 2 @ 1, TTFTB = tetrathiafulvalene-tetrabenzoate, DMF = N,N -dimethylformamide), has been exchanged by tetrathiafulvalenium (TTF •+ ) and N,N ' -dimethyl- 4,4 ' -bipyridinium (MV 2+ ). These cations provide electron carriers and photosensitivity. Read More

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http://dx.doi.org/10.1002/anie.202008941DOI Listing

Tuning the adsorption selectivity of ZIF-8 by amorphization.

Chemistry 2020 Jul 11. Epub 2020 Jul 11.

Ningbo University, The School of Materials Science and Chemical Engineering, Fenghua Road 818#, 315211, Ningbo, CHINA.

Amorphous metal-organic frameworks (amMOFs) with partial collapsed structure present a new category of porous hybrid materials. Herein, a solid-state amorphization of ZIF-8 was achieved by mechanical compression at 0.75 GPa. Read More

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http://dx.doi.org/10.1002/chem.202001249DOI Listing

Universal Access to Two-Dimensional Mesoporous Heterostructures via Micelle-Directed Interfacial Assembly.

Angew Chem Int Ed Engl 2020 Jul 11. Epub 2020 Jul 11.

The University of Queensland, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), Saint Lucia, 4072, Brisbane, AUSTRALIA.

Two-dimensional (2D) mesoporous heterostructures combining ultrathin nanosheet morphology, periodic porous surface structures and diverse hybrid compositions have recently emerged and become increasingly important for renewable energy storage and electronics. However, it remains a great challenge to develop a universal method to prepare 2D mesoporous heterostructures. Here, we report a composite micelle-directed interfacial assembly method to synthesize vertical heterostructures with ultrathin 2D material and two surrounding mesoporous monolayers assembled on both sides. Read More

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http://dx.doi.org/10.1002/anie.202007063DOI Listing

Fragmentation Mechanism of White Phosphorus: A Theoretical Insight into Multiple Cleavage/Formation of P-P and P-C Bonds.

Chemistry 2020 Jul 11. Epub 2020 Jul 11.

Dalian University of Technology, School of Chemical Engineering, CHINA.

Molecular-level understanding of metal-mediated white phosphorus (P 4 ) activation is meaningful but challenging because of its direct relevance to conversion of P 4 into useful organophosphorus compounds as well as the complicated and unforeseeable cleavage process of P-P bonds. The related study, however, has still rarely been achieved to date. We reported here a theoretical insight into step-by-step process of three P-P bond cleavage/four P-C bond formation for [P 3 +P 1 ]-fragmentation of P 4 mediated by lutetacyclopentadienes. Read More

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http://dx.doi.org/10.1002/chem.202002338DOI Listing

Effects of brew strength, brew yield, and roast on the sensory quality of drip brewed coffee.

J Food Sci 2020 Jul 11. Epub 2020 Jul 11.

Department of Food Science and Technology, University of California, One Shields Avenue, Davis, CA, 95616, U.S.A.

Drip brewed coffee is traditionally quantified in terms of its strength, also known as total dissolved solids (TDS), and its brewing yield, also known as percent extraction (PE). Early work in the 1950s yielded classifications of certain regimes of TDS and PE as "underdeveloped," "bitter," or "ideal," with the modifiers "weak" or "strong" simply correlated with TDS. Although this standard is still widely used today, it omits a rich variety of sensory attributes perceptible in coffee. Read More

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http://dx.doi.org/10.1111/1750-3841.15326DOI Listing

Design and optimization of bioreactor to boost carbon dioxide assimilation in RuBisCo-equipped Escherichia coli.

Authors:
Shih-I Tan I-Son Ng

Bioresour Technol 2020 Jul 6;314:123785. Epub 2020 Jul 6.

Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan. Electronic address:

Global warming is a surging issue that has provoked the demand of green process to mitigate carbon dioxide. In this context, RuBisCo-equipped Escherichia coli has first developed and evaluated the CO-assimiliable capability based on the mass balance in three devices: Flask-based in CO incubator (FIC), two-layered device (TLD) and CO bubbling device (CBD) systematically. With the forced diffusion of 5% CO in CBD, which confers an efficient attack of CO to RuBisCo, the CO assimilation increased from -5. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123785DOI Listing

Alkyl chain length affecting uptake of imidazolium based ionic liquids by ryegrass (Lolium perenne L.).

J Hazard Mater 2020 Jul 2;401:123376. Epub 2020 Jul 2.

CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China. Electronic address:

Imidazolium based ionic liquids (ILs) have been extensively used in the various industrial fields, however, the dependence of their structure on toxicity and bioavailability by plants is not clear. Thus, in this study, uptake of imidazolium based ILs with different alkyl chain lengths (e.g. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123376DOI Listing

Co-immobilization of laccase and ABTS onto amino-functionalized ionic liquid-modified magnetic chitosan nanoparticles for pollutants removal.

J Hazard Mater 2020 Jun 30;401:123353. Epub 2020 Jun 30.

State Key Laboratory of Materials-Oriented Chemical Engineering, School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 210009, China. Electronic address:

This work aims to achieve the co-immobilization of laccase and 2,2-binamine-di-3-ethylbenzothiazolin-6-sulfonic acid (ABTS) to improve removal capability of the biocatalyst for pollutants while avoiding potential pollution caused by ABTS. The laccase was immobilized on magnetic chitosan nanoparticles modified with amino-functionalized ionic liquid containing ABTS (MACS-NIL) based on Cu ion chelation (MACS-NIL-Cu-lac). The carrier was characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, x-ray diffraction and etc. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123353DOI Listing

Novel green phosphorene as a superior chemical gas sensing material.

J Hazard Mater 2020 Jun 30;401:123340. Epub 2020 Jun 30.

School of Molecular Sciences, The University of Western Australia, Perth, WA 6009, Australia.

Green phosphorus and its monolayer variant, green phosphorene (GreenP), are the recent members of two-dimensional (2D) phosphorus polymorphs. The new polymorph possesses the high stability, tunable direct bandgap, exceptional electronic transport, and directionally anisotropic properties. All these unique features could reinforce it the new contender in a variety of electronic, optical, and sensing devices. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123340DOI Listing

Synergistic effects, gaseous products, and evolutions of NO precursors during (co-)pyrolysis of textile dyeing sludge and bamboo residues.

J Hazard Mater 2020 Jun 29;401:123331. Epub 2020 Jun 29.

Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.

This study aimed to investigate the synergistic influences of the textile dyeing sludge (TDS) and bamboo residues (BR) co-pyrolysis, and its effects on the formation mechanisms of NH and HCN. The mass loss rate was lower for TDS than BR, with the co-pyrolysis with 50% BR exerting the strongest synergistic effect. The pyrolysis stages 1 (< 400 °C) and 2 (400-800 °C) were best described using the diffusion and third-order reaction mechanisms, respectively. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123331DOI Listing

Highly efficient removal of thallium in wastewater by MnFeO-biochar composite.

J Hazard Mater 2020 Jun 25;401:123311. Epub 2020 Jun 25.

Key Laboratory of Water Quality and Conservation in the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou 510006, China. Electronic address:

Thallium (Tl), is a highly toxic trace metal in the natural environment. Emerging Tl pollution in waters has gradually become a global concern. However, limited removal technologies are available for Tl-containing wastewater. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123311DOI Listing

An efficient broad spectrum-driven carbon and oxygen co-doped g-CN for the photodegradation of endocrine disrupting: Mechanism, degradation pathway, DFT calculation and toluene selective oxidation.

J Hazard Mater 2020 Jun 27;401:123309. Epub 2020 Jun 27.

Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China. Electronic address:

In this study, a new type of carbon and oxygen co-doped g-CN (PACN) was successfully synthesized by a one-step thermal polymerization method for the photodegradation of Bisphenol A (BPA) and selective oxidation of toluene to benzaldehyde. The degradation rate of BPA was 23.58 times higher than that of pristine g-CN and the efficiency benzaldehyde formation rate without the need of any solvent increased to 5. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123309DOI Listing

Recyclable aqueous metal adsorbent: Synthesis and Cu(II) sorption characteristics of ternary nanocomposites of FeO nanoparticles@graphene-poly-N-phenylglycine nanofibers.

J Hazard Mater 2020 Jun 22;401:123283. Epub 2020 Jun 22.

Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Gwangjin-gu, Seoul, 05006, Republic of Korea; Graphene Research Institute (GRI) & GRI-TPC International Research Center, Sejong University, Gwangjin-gu, Seoul, 05006, Republic of Korea. Electronic address:

Metal pollutant adsorbents are an essential material platform for sustainable environmental remediation, but the adsorbents are typically disposable after sorption, which secondarily contaminates the environment. We report on recyclable Cu(II) adsorbent of deprotonated poly-N-phenylglycine nanofibers (d-PPG NFs)-grafted reduced graphene oxide (rGO) sheets intercalated with FeO nanoparticles (NPs), which are synthesized via wet chemical process. The adsorption performances of ternary FeO NPs@rGO-d-PPG NFs and binary FeO NPs@rGO composites are compared, and the ternary ones exhibit much higher Cu-adsorption capacity than binary ones under diverse pH conditions due to both high specific surface area and high cationic affinity of d-PPG NFs that follow the Freundlich adsorption model. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123283DOI Listing

Negative effects on the leaves of submerged macrophyte and associated biofilms growth at high nitrate induced-stress.

Aquat Toxicol 2020 Jul 3;226:105559. Epub 2020 Jul 3.

Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing, 210098, China.

High nitrate (NO-N) concentration is a growing aquatic risk concern worldwide. However, adverse effects of high NO-N concentration on submerged macrophytes-epiphytic biofilms are unclear. In this study, the alterations in physiological changes, biofilms formation and chemical compositions were investigated on leaves of Vallisneria asiatica exposed to different NO-N concentrations. Read More

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http://dx.doi.org/10.1016/j.aquatox.2020.105559DOI Listing

Effects of calcium chelation on the neutralization of milk protein isolate and casein micelle reassembling.

Food Chem 2020 Jul 4;332:127440. Epub 2020 Jul 4.

Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland. Electronic address:

Rehydration in an alkaline solution has been shown to improve the rehydration behaviour of milk protein isolate (MPI). In this study, the focus is on citric acid neutralization of MPI powder dissolved in alkaline solution. The results showed that alkalization induced more negative zeta-potential compared to MPI control, reducing it from -22. Read More

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http://dx.doi.org/10.1016/j.foodchem.2020.127440DOI Listing

Fabrication of electrochemical biosensor composed of multi-functional DNA/rhodium nanoplate heterolayer for thyroxine detection in clinical sample.

Colloids Surf B Biointerfaces 2020 Jul 2;195:111240. Epub 2020 Jul 2.

Department of Chemical Engineering, Kwangwoon University, Wolgye-dong, Nowon-gu, Seoul, 01899, Republic of Korea. Electronic address:

Thyroxine (T4) contains four iodine atoms and is a major thyroid hormone synthesized in the thyroid gland. Abnormal levels of T4 in the body cause various endocrine diseases. The present study describes the fabrication of an electrochemical biosensor composed of a multi-functional DNA structure/rhodium nanoplates heterolayer for precise detection of T4 concentration. Read More

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http://dx.doi.org/10.1016/j.colsurfb.2020.111240DOI Listing

Synthesis of bioactive glass-based coating by plasma electrolytic oxidation: Untangling a new deposition pathway toward titanium implant surfaces.

J Colloid Interface Sci 2020 Jun 29;579:680-698. Epub 2020 Jun 29.

Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil. Electronic address:

Hypothesis: Although bioactive glass (BG) particle coatings were previously developed by different methods, poor particle adhesion to surfaces and reduced biological effects because of glass crystallization have limited their biomedical applications. To overcome this problem, we have untangled, for the first time, plasma electrolytic oxidation (PEO) as a new pathway for the synthesis of bioactive glass-based coating (PEO-BG) on titanium (Ti) materials.

Experiments: Electrolyte solution with bioactive elements (NaSiO-5HO, CHOCa, NaNO, and CHNaOP) was used as a precursor source to obtain a 45S5 bioglass-like composition on a Ti surface by PEO. Read More

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http://dx.doi.org/10.1016/j.jcis.2020.06.102DOI Listing

Sealed pre-carbonization to regulate the porosity and heteroatom sites of biomass derived carbons for lithium-sulfur batteries.

J Colloid Interface Sci 2020 Jul 1;579:667-679. Epub 2020 Jul 1.

School of Environment, Henan Normal University, Xinxiang, Henan 453007, PR China. Electronic address:

Ultrathin carbon sheets with high surface area, abundant mesoporous structure and rich N, O heteroatom doping sites were prepared from puffed rice through unique sealed pre-carbonization. By utilizing them as cathode materials for lithium-sulfur batteries, the in-operando Raman spectra and electrochemical tests indicated that the polysulfides shuttling effect could be substantially suppressed by the physical confinement and chemical adsorption due to these structural advantages. In addition, the well-developed hierarchical porous structure and ultrathin thickness were found to enhance the mass diffusion in the electrode, which increased the ion conductivity within the carbon framework. Read More

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http://dx.doi.org/10.1016/j.jcis.2020.06.068DOI Listing

Design and evaluation a kind of functional biomaterial for bone tissue engineering: Selenium/mesoporous bioactive glass nanospheres.

J Colloid Interface Sci 2020 Jul 1;579:654-666. Epub 2020 Jul 1.

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China. Electronic address:

Conventional treatments of bone tumor involve removal followed by radiation and chemotherapeutic drugs that may have limitations and cause secondary damage. The development of functional filling biomaterial has led to a new strategy for tumor therapy. In this study, a novel therapeutic ion selenium doped mesoporous bioactive glasses (Se/MBG) nanospheres were successfully synthesized by a facile sol-gel technique using cetyl trimethyl ammonium bromide (CTAB) as the template, which had uniform spherical morphology (≈ 400 nm), high surface area (>400 m/g) and mesopore volume (≈0. Read More

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http://dx.doi.org/10.1016/j.jcis.2020.06.122DOI Listing

Synthesis, characterization, photoluminescence, antiproliferative activity, and DNA interaction of cadmium(II) substituted 4'-phenyl-terpyridine compounds.

J Inorg Biochem 2020 Jun 25;210:111165. Epub 2020 Jun 25.

School of Chemistry and Chemical Engineering, Guangxi University, 530004 Nanning, Guangxi, People's Republic of China; Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal. Electronic address:

A series of CdCl complexes (1a-1f and 2a-2c) with 4'-(substituted-phenyl)-2,2':6',2″-terpyridine compounds bearing hydrogen (L), p-methyl (L), p-phenyl (L), p-tolyl (L), p-carboxyl (L), p-fluoro (L), p-hydroxyl (L), m-hydroxyl (L) or o-hydroxyl (L), were prepared and characterized by H NMR, IR, elemental analysis and single crystal X-ray diffraction. All the compounds display interesting photoluminescent properties and different maximal emission peaks due to the difference of the substituent groups. The in vitro antiproliferative activities against four human carcinoma cell lines, A549, Bel-7402, Eca-109 and MCF-7, were investigated and cell viability studies indicate that the compounds have excellent results with the lowest IC values of 0. Read More

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http://dx.doi.org/10.1016/j.jinorgbio.2020.111165DOI Listing

Caudicles in Vandoid Orchids: A Carotenoid-Based Soft Material with Unique Properties.

Acta Biomater 2020 Jul 8. Epub 2020 Jul 8.

State Key Laboratory of Turbulence and Complex Systems, Department of Mechanics and Engineering Science, BIC-ESAT, College of Engineering, Peking University, Beijing, 100871, People's Republic of China; CAPT, HEDPS and IFSA Collaborative Innovation Center of MoE, Peking University, Beijing, 100871, People's Republic of China. Electronic address:

130 years ago, Darwin observed that caudicles in vandoid orchids possess considerable elasticity and further hypothesized that their elasticity serves to improve pollination efficiency. However, there has been no study that seeks to either quantitatively backup Darwin's hypothesis or characterize this natural material for practical use. Here we show that vandoid caudicles are a novel kind of soft material with extremely high extensibility (1190%), low modulus (160 kPa) and density lower than that of water. Read More

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http://dx.doi.org/10.1016/j.actbio.2020.07.005DOI Listing