38,880 results match your criteria Chemical Industry & Chemical Engineering Quarterly[Journal]


Potential threats of zeolitic imidazolate framework-8 nanoparticles to aquatic fungi associated with leaf decomposition.

J Hazard Mater 2020 Jun 22;401:123273. Epub 2020 Jun 22.

School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China; Key Laboratory of Pollution Treatment and Resource, China National Light Industry, Zhengzhou, China; Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Henan Province, China.

Synthesis of zeolitic imidazolate framework-8 nanoparticles (ZIF-8 NPs) and evaluation of their potential threats on ecosystem functioning has been reported in this work. A 45-day indoor experiment was conducted to explore the effects of ZIF-8 NPs at three different concentrations (10, 100, and 1000 μg L) on the aquatic fungal community associated with Populus nigra L. leaf litter decomposition. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jhazmat.2020.123273DOI Listing

Influence of Chemical and Physical Change of Pollen Microgels on Swelling/De-Swelling Behavior.

Macromol Rapid Commun 2020 Jul 6:e2000155. Epub 2020 Jul 6.

School of Materials Science and Engineering, Nanyang Technological University, 50, Nanyang, Avenue 639798, Singapore.

Pollen, the male microgametophyte of seed plants, is commonly used as a food and health supplement. Here, a facile method to transform sunflower pollen into pH-responsive microgels with tailored properties is presented. The structure and morphology of the pollen microgel are characterized by scanning electron microscopy, confocal laser scanning microscopy, and dynamic image particle analysis based on potassium hydroxide treatment with various incubation time and concentration. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1002/marc.202000155DOI Listing

Improvement of the stabilities and antioxidant activities of polyphenols from the leaves of Chinese star anise (Illicium verum Hook. f.) by β-cyclodextrin based metal-organic frameworks (β-CD-MOFs).

J Sci Food Agric 2020 Jul 6. Epub 2020 Jul 6.

Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin, 300134, China.

Background: Polyphenols extracted from plants are usually highly unstable and rapidly transformed into various reaction products during food and drug processing, thus limiting their applications. To improve the stability and solubility of the polyphenols from the leaves of Chinese star anise (Illicium verum Hook. f. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1002/jsfa.10642DOI Listing

Rapid Safety and Quality Control During Fish Shelf-Life by Using A Portable Device.

J Sci Food Agric 2020 Jul 6. Epub 2020 Jul 6.

Department of Health, Animal Science and Food Safety, Università degli Studi di Milano, 6 20133, Milan, Italy.

Background: Fish consumption is increasing nowadays both because of its positive role for health due to the abundant presence of unsaturated fatty acids and for its use in many new food preparations (e.g. raw fillet used for uncooked sushi and sashimi dishes). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1002/jsfa.10646DOI Listing

Recent Progresses in Cancer Nanotherapeutics Design Using Artemisinins as Free Radical Precursors.

Front Chem 2020 17;8:472. Epub 2020 Jun 17.

Institute of Tropical Medicine and Artemisinin Research Center, Guangzhou University of Chinese Medicine, Guangzhou, China.

Artemisinin and its derivatives (ARTs) are sort of important antimalarials, which exhibit a wide range of biological activities including anticancer effect. To solve the issues regarding poor solubility and limited bioavailability of ARTs, nanoformulation of ARTs has thus emerged as a promising strategy for cancer treatment. A common consideration on nanoARTs design lies on ARTs' delivery and controlled release, where ARTs are commonly regarded as hydrophobic drugs. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3389/fchem.2020.00472DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7311774PMC

The mechanisms of hyphal pellet formation mediated by polysaccharides, α-1,3-glucan and galactosaminogalactan, in species.

Fungal Biol Biotechnol 2020 1;7:10. Epub 2020 Jul 1.

Laboratory of Applied Microbiology, Department of Microbial Biotechnology, Graduate School of Agricultural Science, Tohoku University, 468-1 Aramaki-Aoba, Aoba-ku, Sendai, 980-8572 Japan.

Filamentous fungi are widely used for production of enzymes and chemicals, and are industrially cultivated both in liquid and solid cultures. Submerged culture is often used as liquid culture for filamentous fungi. In submerged culture, filamentous fungi show diverse macromorphology such as hyphal pellets and dispersed hyphae depending on culture conditions and genetic backgrounds of fungal strains. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1186/s40694-020-00101-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7329490PMC

Occurrence data of nickel in feed and animal exposure assessment.

EFSA J 2019 Jun 24;17(6):e05754. Epub 2019 Jun 24.

Nickel (Ni) is a silvery-white, hard, ductile metal existing in oxidation states; in biological systems, Ni is the prevalent form. All analytical results used to estimate animal dietary exposure were reported as Ni', without providing information on specific chemical species. Considering the data provided by Member states, among FoodEx level 1 feed categories, the highest mean Ni levels were measured in 'Minerals and products derived thereof' (n = 72). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.2903/j.efsa.2019.5754DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7055724PMC

Engineered disulfide bonds improve thermostability and activity of L-isoleucine hydroxylase for efficient 4-HIL production in 168.

Eng Life Sci 2020 Jan 9;20(1-2):7-16. Epub 2019 Oct 9.

The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology Jiangnan University Wuxi Jiangsu Province P. R. China.

4-Hydroxyisoleucine, a promising drug, has mainly been applied in the clinical treatment of type 2 diabetes in the pharmaceutical industry. l-Isoleucine hydroxylase specifically converts l-Ile to 4-hydroxyisoleucine. However, due to its poor thermostability, the industrial production of 4-hydroxyisoleucine has been largely restricted. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1002/elsc.201900090DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6999076PMC
January 2020

Towards robust cell culture processes - Unraveling the impact of media preparation by spectroscopic online monitoring.

Eng Life Sci 2019 Oct 22;19(10):666-680. Epub 2019 Aug 22.

Bioprocess Development Biologicals Boehringer Ingelheim Pharma GmbH & Co. KG Biberach Germany.

Biopharmaceutical manufacturing processes can be affected by variability in cell culture media, e.g. caused by raw material impurities. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1002/elsc.201900050DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6999248PMC
October 2019

Pasting, viscoelastic and rheological characterization of gluten free (cereals, legume and underutilized) flours with reference to wheat flour.

J Food Sci Technol 2020 Aug 30;57(8):2960-2966. Epub 2020 Mar 30.

Food Engineering and Technology Department, Institute of Chemical Technology, Matunga, Mumbai, 400019 India.

In this study, the rheological properties of dough prepared from gluten free flours (rice, sorghum, moong, water chestnut and unripe banana) and wheat dough were determined. Pasting properties and viscoelastic properties were analyzed using rheometer and dough rheology experiment was performed on texture analyzer. Water chestnut flour exhibited highest peak viscocity (22. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s13197-020-04328-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7316925PMC

Manufacturing chemicals with light: any role in the circular economy?

Philos Trans A Math Phys Eng Sci 2020 Jul 6;378(2176):20190260. Epub 2020 Jul 6.

School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK.

We outline how recent developments in photochemistry can contribute to the realization of the 1912 vision of the pioneering Italian scientist Giacomo Ciamician, namely world-wide chemical-using industry-based chemical plants fuelled solely by the Sun. We then show how a combination of organic photochemistry and flow chemistry could contribute to the circular economy by harnessing the ability of light to provide the energy to promote reactions without the need for some of the added reagents that are necessary in more traditional chemical routes, so-called 'reagentless' chemistry. Photochemistry has a long history but recently it has undergone a renaissance, particularly with the rise in interest in photoredox chemistry. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1098/rsta.2019.0260DOI Listing

Platinum, palladium, and rhodium in airborne particulate matter.

Authors:
Jasmina Rinkovec

Arh Hig Rada Toksikol 2019 Dec;70(4):224-231

Institute for Medical Research and Occupational Health, Environmental Hygiene Unit, Zagreb, Croatia.

Measurable quantities of platinum, palladium, and rhodium, even in remote areas of the planet, evidence the global nature of pollution with these metals, mostly from catalytic converters of modern vehicles (other sources are jewellery production, chemical industry, and anticancer drugs). The amount of the platinum group metals (PGMs) emitted from automobile catalysts varies with the type, age, and condition of the engine and the catalyst, as well as the style of driving. Current literature suggests that the concentrations of these metals have increased considerably over the last twenty years, palladium concentrations in particular, as it has been proved more effective catalyst than platinum. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.2478/aiht-2019-70-3293DOI Listing
December 2019

Spatial-temporal variability of aerosol sources based on chemical composition and particle number size distributions in an urban settlement influenced by metallurgical industry.

Environ Sci Pollut Res Int 2020 Jul 5. Epub 2020 Jul 5.

Department of Public Health Sciences, University of Rochester Medical Center, 265 Crittenden Boulevard, Rochester, NY, 14642-0708, USA.

The Moravian-Silesian region of the Czech Republic with its capital city Ostrava is a European air pollution hot spot for airborne particulate matter (PM). Therefore, the spatiotemporal variability assessment of source contributions to aerosol particles is essential for the successful abatement strategies implementation. Positive Matrix Factorization (PMF) was applied to highly-time resolved PM chemical composition (1 h resolution) and particle number size distribution (PNSD, 14 nm - 10 μm) data measured at the suburban (Ostrava-Plesná) and urban (Ostrava-Radvanice) residential receptor sites in parallel during an intensive winter campaign. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s11356-020-09694-0DOI Listing

Bacteriocins, a natural weapon against bacterial contamination for greater safety and preservation of food.

Curr Pharm Biotechnol 2020 Jul 4. Epub 2020 Jul 4.

Università degli Studi di Catania, Dipartimento di Scienze Biomediche e Biotecnologiche BIOMETEC, Sez. Microbiologia, Torre Biologica, via S. Sofia 97, 95123 Catania. Italy.

Nowadays, consumers have become increasingly attentive to human health and the use of more natural products. Consequently, the demand for natural preservatives in the food industry is more frequent. This has led to an intense research to discover new antimicrobial compounds of natural origin which could effectively fight foodborne pathogens. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.2174/1389201021666200704145427DOI Listing

Isolation and evaluation of trypanocidal activity of sesquiterpenoids, flavonoids, and lignans in Artemisia sieversiana collected in Mongolia.

J Nat Med 2020 Jul 3. Epub 2020 Jul 3.

National University of Mongolia, Ulaanbaatar, Mongolia.

Artemisia sieversiana is an annual herbaceous plant distributed throughout Central and East Eurasia and is regarded as an undesirable forage plant in Mongolia. It affects livestock, so information about its chemical composition is needed. We isolated three new sesquiterpenoids (1-3) and known compounds from A. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s11418-020-01429-2DOI Listing

Modeling of butyric acid recognition by molecular imprinted polyimide.

J Mol Model 2020 Jul 3;26(8):194. Epub 2020 Jul 3.

Australian Centre for Research on Separation Sciences, University of Tasmania, Private Bag 75, Hobart, Tasmania, 7001, Australia.

The constitutional repeating unit structures of poly(pyromellitic dianhydride-co-4,4'-oxydianiline) or polyamiс acid, butyric acid and complexes between butyric acid and one, two or three units of polyamiс acid were calculated using the density functional theory method (DFT B3LYP) on a 6-31G(d,p) basis with the basis set superposition error (BSSE) correction in the program Gaussian 09. The optimised structures of the template and polyamiс acid allowed to establish intermolecular non-covalent interactions during imprinting and, based on the results, develop a method of polyimide-based molecularly imprinted polymer preparation using butyric acid as template. It was shown that the optimum molar ratio of reagents used for the synthesis of molecularly imprinted polymer is 1:1 (interaction energy ∆E = 43. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s00894-020-04462-wDOI Listing

Fine-scale succession patterns and assembly mechanisms of bacterial community of Litopenaeus vannamei larvae across the developmental cycle.

Microbiome 2020 Jul 3;8(1):106. Epub 2020 Jul 3.

State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, China.

Background: Microbiome assembly in early life may have a long-term impact on host health. Larval nursery is a crucial period that determines the success in culture of Litopenaeus vannamei, the most productive shrimp species in world aquaculture industry. However, the succession patterns and assembly mechanisms of larval shrimp bacterial community still lack characterization at a fine temporal scale. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1186/s40168-020-00879-wDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7334860PMC

Analysis of Plant Cell Walls by Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy.

Methods Mol Biol 2020 ;2149:297-313

Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, UK.

Attenuated total reflectance Fourier transform mid-infrared (ATR-FTIR) spectroscopy is widely applicable for the chemical analysis of biological materials, relatively inexpensive, requires only simple sample preparation, and is of comparatively high-throughput compared to traditional wet chemical or chromatographic methods. It is particularly well suited for the nondestructive analysis of dried and finely ground plant samples for the subsequent prediction of cell wall and other compositional or processing parameters using chemometric regression models. Furthermore, analysis of mid IR spectra by nonregression methods (e. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/978-1-0716-0621-6_16DOI Listing
January 2020

Effective degradation of tetracycline by magnetic palygorskite synthesized with different dosages of NaOH.

Water Sci Technol 2020 Apr;81(7):1452-1460

School of Environment, South China Normal University, University Town, Guangzhou 510006, China; Guangdong Technology Research Center for Ecological Management and Remediation of Water System, Guangzhou 510006, China and Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou 510006, China E-mail:

In the process of preparing magnetic palygorskite from waste pickling liquor of the steel industry, the dosage of NaOH will affect the properties of the magnetic palygorskite. The experimental results showed that magnetic palygorskite can be effectively prepared when NaOH dosage is between 255 and 330 g/L. Vibration sample magnetometry proved that different NaOH dosages can affect the saturation magnetization of magnetic palygorskite. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.2166/wst.2020.194DOI Listing

Cost-effective removal of COD in the pre-treatment of wastewater from the paper industry.

Water Sci Technol 2020 Apr;81(7):1345-1353

Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Fisciano, SA, Italy; Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Córdoba, Argentina.

The present paper reveals results of research for cost-effective removal of chemical oxygen demand (COD) contained in industrial paper mill effluent. Not only process efficiency but also wastewater treatment costs are discussed. Different pre-treatment processes are applied aiming to investigate the COD removal before discharge to the municipal sewage network. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.2166/wst.2019.328DOI Listing

Genomic characterization of the most barotolerant Listeria monocytogenes RO15 strain compared to reference strains used to evaluate food high pressure processing.

BMC Genomics 2020 Jul 2;21(1):455. Epub 2020 Jul 2.

Institute of Biotechnology, University of Helsinki, Helsinki, Finland.

Background: High pressure processing (HPP; i.e. 100-600 MPa pressure depending on product) is a non-thermal preservation technique adopted by the food industry to decrease significantly foodborne pathogens, including Listeria monocytogenes, from food. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1186/s12864-020-06819-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7331262PMC

Pharmacological Uses of the Plants Belonging to the Genus Commiphora.

Cardiovasc Hematol Agents Med Chem 2020 Jul 2. Epub 2020 Jul 2.

Department of Pharmaceutical Chemistry, Nandha College of Pharmacy, Koorapalayam Pirivu, Pitchandam Palayam Post, Erode, Tamil Nadu. India.

Natural products have a unique place in the healthcare industry. The genus Commiphora emerged as a potential medicinal with huge benefits as evidenced through its use in various traditional and modern systems of medicine. Therefore, we aimed to prepare a concise review on the pharmacological activities and the indigenous uses of various plant species belonging to the genus Commiphora along with the structural information of various active botanical ingredients present in these plants based on the published literatures and scientific reports. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.2174/1871525718666200702125558DOI Listing

Platycodon grandiflorum roots: A comprehensive study on odor/aroma and chemical properties during roasting.

J Food Biochem 2020 Jul 2:e13344. Epub 2020 Jul 2.

Department of Food Science, Gyeongnam National University of Science and Technology, Jinju, Republic of Korea.

Platycodon is a ubiquitous plant widely grown in Asia. This study investigated changes in odor/aroma associated sensory attributes and chemical properties in Platycodon grandiflorum roots upon roasting. Amino acid analysis, electronic tongue analysis, chemical property analysis, volatile compound analysis, GC-olfactometry-assisted sensory attributes, and electronic nose analysis were performed. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/jfbc.13344DOI Listing

Relationship between structure and efficacy of sea cucumber saponins echinoside A and its derivatives on hemolytic activity and prevention of nonalcoholic fatty liver disease.

J Food Sci 2020 Jul 2. Epub 2020 Jul 2.

College of Food Science and Engineering, Ocean University of China, No. 5 Yushan Road, Qingdao, Shandong Province, 266003, P.R. China.

The hemolytic property discourages the development of sea cucumber saponins on alleviating lipids metabolism disturbance. The hemolytic activity of saponins has been reported to be highly correlative to their chemical structures. The aim of this study was to reduce the hemolytic activity of sea cucumber-derived saponins echinoside A (EA) and simultaneously remain its effect on alleviating non-alcoholic fatty liver disease (NAFLD) by structural modifications. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/1750-3841.15126DOI Listing

Pigment production by Fusarium solani BRM054066 and determination of antioxidant and anti-inflammatory properties.

AMB Express 2020 Jul 1;10(1):117. Epub 2020 Jul 1.

Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia. Vitória da Conquista, Bahia, Brazil.

The fungal kingdom has been widely studied as a source of bioactive compounds of interest to the pharmaceutical and food industry. This paper studies the production of natural red pigments by Fusarium solani BRM054066 in the submerged fermentation system, using Doehlert experimental design to determine optimal cultivation conditions. The chemical composition of the red pigment was determined by Nuclear Magnetic Resonance spectroscopy (NMR) and Ultra-Performance Liquid Chromatography coupled to Mass Spectrometry (UPLC-MS). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1186/s13568-020-01054-yDOI Listing

Design and capital cost optimisation of three-phase gravity separators.

Heliyon 2020 Jun 23;6(6):e04065. Epub 2020 Jun 23.

School of Computing, Engineering and Digital Technologies, Teesside University, UK.

The separation of produced fluids is essential once it reaches the surface. This separation is achieved in gravity separators. The design and sizing of separators can be challenging due to the number of factors involved. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.heliyon.2020.e04065DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7321976PMC

Cow manure application effectively regulates the soil bacterial community in tea plantation.

BMC Microbiol 2020 Jul 1;20(1):190. Epub 2020 Jul 1.

Tea Research Institute, Qingdao Agricultural University, Qingdao, 266109, Shandong, China.

Background: Cow manure is not only an agricultural waste, but also an organic fertilizer resource. The application of organic fertilizer is a feasible practice to mitigate the soil degradation caused by overuse of chemical fertilizers, which can affect the bacterial diversity and community composition in soils. However, to our knowledge, the information about the soil bacterial diversity and composition in tea plantation applied with cow manure fertilization was limited. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1186/s12866-020-01871-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7329415PMC

Effects of Apigenin on RBL-2H3, RAW264.7, and HaCaT Cells: Anti-Allergic, Anti-Inflammatory, and Skin-Protective Activities.

Int J Mol Sci 2020 Jun 29;21(13). Epub 2020 Jun 29.

Department of Medicinal Biosciences, Research Institute for Biomedical & Health Science, College of Biomedical and Health Science, Konkuk University, 268 Chungwon-daero Chungju-si 27478, Korea.

Apigenin (4',5,7-trihydroxyflavone, flavonoid) is a phenolic compound that is known to reduce the risk of chronic disease owing to its low toxicity. The first study on apigenin analyzed its effect on histamine release in the 1950s. Since then, anti-mutation and antitumor properties of apigenin have been widely reported. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ijms21134620DOI Listing

Papain immobilized on alginate membrane for wound dressing application.

Colloids Surf B Biointerfaces 2020 Jun 25;194:111222. Epub 2020 Jun 25.

Department of Chemical Engineering, Federal University of Ceará, 60455-760, Campus of Pici, Fortaleza, Brazil. Electronic address:

Wound dressings based on natural polymers are of considerable interest in the pharmaceutical industry owing to their improved performance in the human body when compared to synthetic polymers. Alginate, a polysaccharide from brown algae, is commonly studied as a wound dressing owing to its biocompatibility and biodegradability. To improve its therapeutic features and thereby increase wound healing, papain (a proteolytic enzyme from Carica papaya latex) was proposed to be incorporated. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.colsurfb.2020.111222DOI Listing

[Source Profiles of Industrial Emission-Based VOCs in Chengdu].

Huan Jing Ke Xue 2020 Jul;41(7):3042-3055

Chengdu Key Laboratory of Air Pollution Research, Chengdu Academy of Environmental Sciences, Chengdu 610072, China.

The volatile organic compound (VOC) emission characteristics of various production procedures were analyzed through GC-MS after the emissions of typical enterprises such as automobile manufacturing, petrochemical, and other industries had been sampled with SUMMA canisters. Each production procedure in the automobile manufacturing and petrochemical industries was considered. The results showed that each automobile manufacturing procedure had its own dominant species, and alkanes (32%) and aromatics (35%) were the main emission species of coating spraying. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.13227/j.hjkx.201912203DOI Listing

[Evaluation of the Reduction in PM Concentration During the National Traditional Games of Ethnic Minorities in Zhengzhou].

Huan Jing Ke Xue 2020 Jul;41(7):3004-3011

College of Chemistry, Research Institute of Environmental Science, Zhengzhou University, Zhengzhou 450001, China.

To evaluate the effect of the implementation of emission reduction measures and the improvement in air quality during the National Traditional Games of Ethnic Minorities in Zhengzhou, a series of online instruments were used to continuously observe air pollutants and components of PM from August 5 to September 30, 2019. Three cases, including before emission reduction (August 5-24), during emission reduction (August 25 to September 18), and after emission reduction (September 19-30), were classified by the implementation of control measures. The results show that the growing concentration of PM after the cancellation of emission abatement measures (11. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.13227/j.hjkx.201911045DOI Listing

[Contribution of Emissions from the Iron and Steel Industry to Air Quality in China].

Huan Jing Ke Xue 2020 Jul;41(7):2981-2994

Hebei Zhengrun Environmental Technology Co., Ltd., Shijiazhuang 050091, China.

Based on the data from a continuous emission monitoring systems network in 2015, this study analyzed the compliance rates of exhaust gas in the processes of China's iron and steel industry, and established a high-resolution steel plant emission inventory for China (HSEC, 2015), based on the bottom-up method. The contribution of emissions from the iron and steel industry to regional air quality was quantitatively simulated using a CAMx model. The results showed that in 2015, the total emissions of SO, NO, PM, PM, PCDD/Fs, VOCs, CO, BC, OC, EC, and F were 374800 t, 720500 t, 334800 t, 150300 t, 1. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.13227/j.hjkx.201912166DOI Listing

[Comparison of Three Receptor Models for Source Apportionment of PM in Shanghai: Using Hourly Resolved PM Chemical Composition Data].

Authors:
Min Zhou

Huan Jing Ke Xue 2020 May;41(5):1997-2005

Shanghai Academy of Environmental Sciences, Shanghai 200233, China.

Continuous measurements of PM and its chemical composition, including inorganic ions, carbon components, and inorganic elements, were conducted in the urban area of Shanghai from November 2 to 24, 2014. The chemical characteristics and sources of PM were discussed. The average mass concentration of PM was (64±33) μg·m (ranging from 12 to 181 μg·m). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.13227/j.hjkx.201909170DOI Listing

[Photocatalytic Degradation of Rhodamine B with Micro-SiC/Graphene Composite Under Visible Light Irradiation].

Huan Jing Ke Xue 2020 Feb;41(2):756-762

College of Resources and Environment, Southwest University, Chongqing 400715, China.

To develop low consumption and an environmentally friendly degradation technology for organic pollutants, micro-SiC/graphene composite materials were synthesized by photocatalytic reduction, and the composition and morphology of the prepared materials were characterized by XRD, FTIR, Raman spectroscopy, XPS, and SEM. Rhodamine B (RhB) was selected as the simulated pollutant to investigate the photocatalytic activity and stability of composite materials under visible light irradiation. The degradation mechanism was preliminarily discussed by active species capture experiments. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.13227/j.hjkx.201908089DOI Listing
February 2020

[Source Profiles and Impact of Volatile Organic Compounds in the Coating Manufacturing Industry].

Huan Jing Ke Xue 2020 Apr;41(4):1582-1588

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

SUMMA canisters were used to collect the exhaust gas from eight coating manufacturers in East China. A total of 106 VOCs was determined by gas chromatography-mass spectrometry (GC-MS) method to identify the emission characteristics of volatile organic compounds (VOCs) and the contribution of VOCs emitted by various companies to ozone generation, and the source profiles of solvent-based and water-based coatings were established. The results show that the characteristic components of VOCs in the coating manufacturing industry are mainly aromatic hydrocarbons and oxygenated hydrocarbons. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.13227/j.hjkx.201908203DOI Listing

[Accounting Methods of VOCs Emission Associated with Production Processes in a Fine Chemical Industrial Park].

Huan Jing Ke Xue 2020 Mar;41(3):1116-1122

School of Environment, Tsinghua University, Beijing 100084, China.

Volatile organic compounds (VOCs) are one of the key atmospheric pollutants associated with great impact on air quality. Industrial sources have become the most important source of VOCs emissions in China, of which the chemical industry accounts for a large part. At present, more than half of chemical manufacturers are clustered in chemical industrial parks (CIPs), thus the control of VOCs in CIPs is crucial. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.13227/j.hjkx.201909088DOI Listing

[Analysis of Chemical Components and Sources of PM During Autumn and Winter in Yangquan City].

Huan Jing Ke Xue 2020 Mar;41(3):1036-1044

Key Laboratory of Resources and Environmental Systems Optimization, Ministry of Education, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.

PM samples were collected from October 15, 2017 to January 23, 2018 in the Yangquan urban area. The characteristics of PM and its main chemical components on clean and polluted days were analyzed, and source apportionment of PM was conducted using enrichment factor analysis (EF) and positive matrix factorization (PMF). The results showed that the ratios of secondary inorganic ions (SO, NO, and NH) to PM on polluted days was 23. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.13227/j.hjkx.201906024DOI Listing

Oil crop genetic modification for producing added value lipids.

Crit Rev Biotechnol 2020 Jun 30:1-10. Epub 2020 Jun 30.

Salt-soil Agricultural Center, Key Laboratory of Agricultural Environment in the Lower Reaches of Yangtze River Plain, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences(JAAS), Nanjing, PR China.

Plant lipids, mainly stored in seeds and other plant parts, are not only a crucial resource for food and fodder but are also a promising alternative to fossil oils as a chemical industry feedstock. Oil crop cultivation and processing are always important parts of agriculture worldwide. Vegetable oils containing polyunsaturated fatty acids, very long chain fatty acids, conjugated fatty acids, hydroxy fatty acids and wax esters, have outstanding nutritional, lubricating, surfactant, and artificial-fibre-synthesis properties, amongst others. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1080/07388551.2020.1785384DOI Listing

Vine-Canes as a Source of Value-Added Compounds for Cosmetic Formulations.

Molecules 2020 Jun 28;25(13). Epub 2020 Jun 28.

REQUIMTE/LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4249-015 Porto, Portugal.

The majority of works about vine-canes are focused on the evaluation of their chemical composition and antioxidant potential. To the best of our knowledge, the possible applications of produced extracts in cosmetic formulations have never been explored. The aim of the present study was to evaluate the antioxidant properties of vine-canes subcritical water extracts for use as active ingredients in the cosmetic industry. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/molecules25132969DOI Listing
June 2020
2.416 Impact Factor

The Effects of Reprocessing and Fiber Treatments on the Properties of Polypropylene-Sugarcane Bagasse Biocomposites.

Polymers (Basel) 2020 Jun 27;12(7). Epub 2020 Jun 27.

Research Group for Manufacturing Technologies GITEM, Universidad Autónoma de Occidente, Cali 760030, Colombia.

This study explores the reprocessing behavior of polypropylene-sugarcane bagasse biocomposites using neat and chemically treated bagasse fibers (20 wt.%). Biocomposites were reprocessed 5 times using the extrusion process followed by injection molding. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/polym12071440DOI Listing

Enhanced Surface Energetics of CNT-Grafted Carbon Fibers for Superior Electrical and Mechanical Properties in CFRPs.

Polymers (Basel) 2020 Jun 26;12(6). Epub 2020 Jun 26.

Research Laboratory for Multifunctional Carbon Materials, Korea Institute of Carbon Convergence Technology (KCTECH), Jeonju 54853, Korea.

Surface enhancement of components is vital for achieving superior properties in a composite system. In this study, carbon nanotubes (CNTs) were grown on carbon fiber (CF) substrates to improve the surface area and, in turn, increase the adhesion between epoxy-resin and CFs. Nickel (Ni) was used as the catalyst in CNT growth, and was coated on CF sheets via the electroplating method. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/polym12061432DOI Listing

Aromatic Herbs, Medicinal Plant-Derived Essential Oils, and Phytochemical Extracts as Potential Therapies for Coronaviruses: Future Perspectives.

Plants (Basel) 2020 Jun 26;9(6). Epub 2020 Jun 26.

Department of Chemistry, University of Alabama in Huntsville, Huntsville, AL 35899, USA.

After its recent discovery in patients with serious pneumonia in Wuhan (China), the 2019 novel coronavirus (2019-nCoV), named also Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), has spread quickly. Unfortunately, no drug or vaccine for treating human this coronavirus infection is available yet. Numerous options for controlling or preventing emerging 2019-nCoV infections may be predicted, including vaccines, interferon therapies, and small-molecule drugs. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/plants9060800DOI Listing

Effect of NaOH Treatment on the Flexural Modulus of Hemp Core Reinforced Composites and on the Intrinsic Flexural Moduli of the Fibers.

Polymers (Basel) 2020 Jun 26;12(6). Epub 2020 Jun 26.

LEPAMAP Research Group, University of Girona, Maria Aurèlia Capmany, 61, 17003 Girona, Spain.

This paper describes the potential of using hemp core waste in the composite industry. These lignocellulosic residues can be used to produce environmentally friendly and economically viable composites and improve the overall value chain of hemp production. To this purpose, hemp core residues were alkaline treated at different NaOH concentrations and then mechanically defibrated. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/polym12061428DOI Listing

Enhancement of Mechanical Properties and Porosity of Concrete Using Steel Slag Coarse Aggregate.

Materials (Basel) 2020 Jun 26;13(12). Epub 2020 Jun 26.

Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Assam 781039, India.

This paper investigates the possibility of utilizing steel slags produced in the steelmaking industry as an alternative to burnt clay brick aggregate (BA) in concrete. Within this context, physical, mechanical (i.e. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma13122865DOI Listing

Enhanced Interfacial Adhesion of Polydimethylsiloxane (PDMS) by Control of the Crosslink Density.

J Nanosci Nanotechnol 2020 Nov;20(11):6768-6775

Korea Packaging Center of Korea Institute of Industrial Technology, 397 Seokcheon-ro, Bucheon-si, Gyeonggi-do, 14449, Republic of Korea.

In this paper, we report a simple, fast, and one-step approach to improve the adhesion force of polydimethylsiloxane (PDMS) by incorporating inorganic nanoparticles that can control the physical, mechanical, and adhesion properties of the PDMS. An organic/inorganic PDMS-based composite was fabricated by the hydrosilylation of vinyl-decorated silica nanoparticles (v-SNPs) and the PDMS. The v-SNP/PDMS composite showed a significantly decreased elastic modulus and increased elongation compared with that of pristine SNPs incorporated with the PDMS composite (SNP/PDMS) and pristine PDMS. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1166/jnn.2020.18804DOI Listing
November 2020

Assessing Contamination of Stream Networks near Shale Gas Development Using a New Geospatial Tool.

Environ Sci Technol 2020 Jun 30. Epub 2020 Jun 30.

Earth and Environmental Systems Institute, Pennsylvania State University, University Park, Pennsylvania 16802, United States.

Chemical spills in streams can impact ecosystem or human health. Typically, the public learns of spills from reports from industry, media, or government rather than monitoring data. For example, ∼1300 spills (76 ≥ 400 gallons or ∼1500 L) were reported from 2007 to 2014 by the regulator for natural gas wellpads in the Marcellus shale region of Pennsylvania (U. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.est.9b06761DOI Listing

Mannitol: physiological functionalities, determination methods, biotechnological production, and applications.

Appl Microbiol Biotechnol 2020 Jun 29. Epub 2020 Jun 29.

State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, China.

Mannitol is a naturally occurring six-carbon sugar alcohol that has wide applications in the food and pharmaceutical industry because of its many properties, namely being a natural sweetener with a low metabolism and no glycemic index. The increasing demand for mannitol has spurred many studies of its production. Compared with its chemical synthesis and extraction from plants, both of which are difficult to satisfy for industrial requirements, biotechnological production of mannitol has received considerably more attention and interest from scientists because of its known advantages over those two methods. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s00253-020-10757-yDOI Listing

NH formation from N and H mediated by molecular tri-iron complexes.

Nat Chem 2020 Jun 29. Epub 2020 Jun 29.

Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Braunschweig, Germany.

Living systems carry out the reduction of N to ammonia (NH) through a series of protonation and electron transfer steps under ambient conditions using the enzyme nitrogenase. In the chemical industry, the Haber-Bosch process hydrogenates N but requires high temperatures and pressures. Both processes rely on iron-based catalysts, but molecular iron complexes that promote the formation of NH on addition of H to N have remained difficult to devise. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1038/s41557-020-0483-7DOI Listing