Results 31 to 40 of about 1,811,393 (164)

Microplastics Pollution in Chile: Current Situation and Future Prospects

Frontiers in Environmental Science, 2021
Millions of tons of plastics enter wild habitats, especially the oceans, every year. Despite extensive efforts, this amount is predicted to increase over in the near future, leading to a catastrophic damage to the environment.
Esteban Paredes-Osses, Esteban Paredes-Osses, Karla Pozo, Karla Pozo, Andrés Opazo-Capurro, Andrés Opazo-Capurro, Paulina Bahamonde, Jaime R. Cabrera-Pardo, Jaime R. Cabrera-Pardo   +8 more
doaj   +1 more source

Short-cut nitrogen removal from high-strength ammonia wastewater in a sequencing batch biofilm reactor: roles of NO and its production mechanism

Frontiers in Microbiology
Nitric oxide (NO) is a key intermediate in the biological nitrogen removal process. However, its role and production mechanism is still not fully understood.
Junkai Zhao, Junkai Zhao, Ju Zhang, Ju Zhang, Heng Yu, Heng Yu, Wenjuan Yang, Wenjuan Yang, Jianqiang Zhao, Jianqiang Zhao, Shuhan Lei, Jie Yang   +11 more
doaj   +1 more source

Evaluation of Chemical Constituents of Litchi Pericarp Extracts and Its Antioxidant Activity in Mice

Foods, 2022
Litchi pericarp is the main byproduct of litchi processing and contains several polyphenols. However, the chemical constituents and the antioxidant effect in litchi pericarp extracts (LPE) have been rarely studied. The result of the quantitative analyses
Ziming Yang, Li Zhang, Yuan-Hang Wu, Dian-Peng Li, Wei Li   +4 more
doaj   +1 more source

Unrecognized Health Effects of Chemicals [PDF]

AAOHN Journal, 2010
Worker populations continue to be at risk for exposure to chemicals, many of which are toxic, while completing work tasks. Although some of the health effects of chemicals are known, many have not yet been identified or recognized. Chemical products used during industrial work processes require thorough evaluation, testing, and long-term monitoring ...
openaire   +2 more sources

Frequency-Range-Specific Hand–Arm Vibration Exposure and the Risk of Musculoskeletal Disorders of the Upper Extremities: The German Hand–Arm Vibration Study

Vibration
To quantify the effect of frequency-range-specific hand–arm vibration (FRS-HAV) exposure on the risk of musculoskeletal disorders of the upper limb (UMSDs), we performed an analysis among the study sample of the German Hand–Arm Vibration Study. In total,
Yi Sun, Frank Bochmann, Winfried Eckert, Uwe Nigmann, Christian van den Berg, Uwe Kaulbars, Nastaran Raffler   +6 more
doaj   +1 more source

Chemical Synthesis and Characterization of Pd/SiO2: The Effect of Chemical Reagent

Metals, 2018
The size and shape distribution of metal nanoparticles (NPs) are important parameters that need to be tuned in order to achieve desired properties of materials for practical applications.
Aram L. Bugaev, Vladimir A. Polyakov, Andrei A. Tereshchenko, Ashura N. Isaeva, Alina A. Skorynina, Elizaveta G. Kamyshova, Andriy P. Budnyk, Tatiana A. Lastovina, Alexander V. Soldatov   +8 more
doaj   +1 more source

DIRIGINDO O OLHAR PARA O EFEITO ESTUFA NOS LIVROS DIDÁTICOS DE ENSINO MÉDIO: É SIMPLES ENTENDER ESSE FENÔMENO?

Ensaio Pesquisa em Educação em Ciências
Os livros didáticos, pela disponibilidade e acesso, são uma fonte importante de pesquisa para o professor de Ensino Médio, ao selecionar conteúdos e preparar suas aulas.
Anderson Cezar Lobato, Cristina Neres da Silva, Rochel Montero Lago, Zenilda de Lourdes Cardeal, Ana Luiza de Quadros   +4 more
doaj   +1 more source

Chemical Modification of Kraft Lignin: Effect on Chemical and Thermal Properties

BioResources, 2014
Esterified kraft lignins (KL) were prepared by reaction with maleic anhydride (MA), succinic anhydride (SA), and phthalic anhydride (PA) in acetone solutions.
Yao Chen, Nicole M. Stark, Zhiyong Cai, Charles R. Frihart, Linda F. Lorenz, Rebecca E. Ibach   +5 more
doaj   +1 more source

Research Progress on Dynamic Mechanical Response Characteristics of High-Velocity Particle Flow Impacting Multilayer Sandwich Composite Structures

Gaoya wuli xuebao
Multilayer sandwich composite structures have significant applications in impact protection. In particular, they demonstrate superior protective performance when subjected to impacts from explosive fragment particle clusters.
Wei ZHENG, Kunxuan WANG, Dengwang WANG, Jun LI, Yubo GAO   +4 more
doaj   +1 more source

Dataset on target chemical and bioassay analysis—Exploring contaminants of emerging concern in a low mountain river of central Germany

Data in Brief
Chemical pollution of the aquatic environment is nowadays characterised by increasing levels of anthropogenic organic compounds at low concentrations and is recognised as one of the main drivers of the deteriorated ecological state of European ...
Fabian G. Weichert, Werner Brack, Mario Brauns, Patrick Fink, Sarah Johann, Martin Krauss, Henner Hollert   +6 more
doaj   +1 more source