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Investigation of the Gas-Phase N + CHCN Reaction at Low Temperatures.
J Phys Chem A
January 2025
Department of Chemistry, Saitama University, Saitama City, Saitama 338-8570, Japan.
Rate coefficients for ion-polar-molecule reactions between acetonitrile molecules (CHCN) and nitrogen molecular ions (N), which are of importance to the upper atmospheric chemistry of Saturn's moon Titan, were measured for the first time at low translational temperatures. In the experiments, the reaction between sympathetically cooled N ions embedded in laser-cooled Ca Coulomb crystals and velocity-selected acetonitrile molecules generated using a wavy Stark velocity filter was studied to determine the reaction rate coefficients. Capture rate coefficients calculated by the Su-Chesnavich approach and by the perturbed rotational state theory considering the rotational state distribution of CHCN were compared to the experimental rate coefficients.
View Article and Find Full Text PDFAmmonia distribution characteristics at the selective catalytic reduction reactor inlet with linear partitioning.
iScience
January 2025
Electrical Engineering College, Guizhou University, Guiyang 550025, China.
Analyzing the uniformity of ammonia distribution at the inlet of selective catalytic reduction reactors is crucial for enhancing denitrification efficiency. To minimize ammonia slip while ensuring effective denitrification, this study examines ammonia flow characteristics in the SCR system under various zoning schemes. In scheme I, zones A1, A2, A3, and A4 predominantly influence the left, center, center-right, and far-right regions of the reactor inlet.
View Article and Find Full Text PDFIncreasing anthropogenic stressors influenced the water quality and shifted trophic status of northern Lake Tana Gulf, Ethiopia.
Heliyon
January 2025
Department of Zoological Sciences, Addis Ababa University, 1176, Addis Ababa, Ethiopia.
Nutrients in an aquatic system determine productivity, integrity and ecological status of the aquatic system. However, the excessive enrichment of these nutrients emanating from severe anthropogenic activity has substantially impacted water quality and biodiversity. There is diminutive information available on the water quality and trophic status of the northern Gulf of Lake Tana, Ethiopia due to accessibility difficulties.
View Article and Find Full Text PDFEffects of aluminum on metabolism of reactive oxygen species and reactive nitrogen species in root tips of different Eucalyptus species.
BMC Plant Biol
January 2025
Guangxi Colleges and Universities Key Laboratory for Cultivation and Utilization of Subtropical Forest Plantation, Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning, 530004, China.
On acidified soil, the growth of Eucalyptus is seriously restricted by aluminum (Al) stress. Therefore, breeding Eucalyptus species with excellent Al tolerance, developing the genetic potential of species, and improving tolerance to Al stress are important for the sustainable development of artificial Eucalyptus forests. By observing the occurrence and distribution of the main reactive oxygen species (ROS) and reactive nitrogen species (RNS) in root tips of Eucalyptus seedlings under Al stress, this study analyzed change in the growth and physiological indexes of Eucalyptus seedlings under Al stress.
View Article and Find Full Text PDFDietary Compounds in the Prevention of Arsenic Induced Intestinal Toxicity .
J Med Food
January 2025
Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna (Valencia), Spain.
Recent studies show that inorganic arsenic (As) exerts a toxic effect on the intestinal epithelium, causing a significant increase in its permeability. This disruption of the epithelial barrier may favor the entry of contaminants or toxins into the systemic circulation, thus causing toxicity not only at the intestinal level but possibly also at the systemic level. The present study conducts an evaluation of the protective effect of various dietary supplements and plant extracts against the intestinal toxicity of inorganic As.
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