المؤلفون: Qingqing Zha, Wenbo Bai, Feifei Yuan, Lei Li, Guoxu Qin, Yonghong Ni, Jing Wang

المصدر: Talanta. 221:121421

مصطلحات موضوعية: chemistry.chemical_classification, Detection limit, Aqueous solution, Chemistry, 010401 analytical chemistry, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Fluorescence, Exfoliation joint, 0104 chemical sciences, Analytical Chemistry, Fluorescence intensity, Dicarboxylic acid, medicine, 0210 nano-technology, Selectivity, Cefixime, medicine.drug, Nuclear chemistry

الوصف: Two-dimensional Cd-MOF/Tb3+ (Cd-MOF = [Cd (μ-2,3-pdc) (H2O)3]n (2,3-pdc = 2,3-pyridine dicarboxylic acid)) fluorescent nanosheets with the thickness of 1.4 nm were successfully synthesized by a simple solution route with subsequent ultrasonic exfoliation at room temperature. It was found that as-obtained Cd-MOF/Tb3+ ultrathin nanosheets could be homogeneously dispersed in aqueous system to form a sol with excellent stability. Also, the fluorescence intensity of nanosheets remarkably increased to almost 12 times higher than that of Cd-MOF/Tb3+ microsheets before exfoliation. Further investigations uncovered that the above strong fluorescence of Cd-MOF/Tb3+ nanosheets could be highly sensitively quenched by Cefixime antibiotic in aqueous solution without interference from other antibiotics, amino acids and pesticides. Hence, the as-obtained ultrathin Cd-MOF/Tb3+ nanosheets could be prepared as a highly selective and sensitive fluorescence probe for the detection of Cefixime in aqueous system. Compared with the bulk Cd-MOF/Tb3+ sensor, the Cd-MOF/Tb3+ ultrathin nanosheets sensor exhibited a far lower detection limit down to 26.7 nM for CFX. Also, the as-obtained nanosheets sensor presented satisfactory recovery ranging from 98.07% to 103.01% and acceptable repeatability (RSD

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::b57eb2541fdec772c1fed2c155d5cd6fTest
https://doi.org/10.1016/j.talanta.2020.121421Test

المؤلفون: Y. Wu, B. Liu, Song Jiqing, Hailin Zhang, Wenbo Bai

المصدر: Soil Use and Management. 26:253-260

مصطلحات موضوعية: Moisture, Chemistry, Soil Science, Soil science, complex mixtures, Pollution, Bulk density, Water retention, Soil conditioner, Environmental chemistry, Soil pH, Soil water, medicine, Wetting, medicine.symptom, Agronomy and Crop Science, Water content

الوصف: Super-absorbent polymers (SAPs), a group of new water-saving materials and soil conditioners, have been widely adopted in agriculture, but little is known about their effects on soil physical and chemical properties under alternating dry and wet conditions. This study assesses soil moisture, bulk density, pH, electrical conductivity (EC) and available P and K after different wetting and drying cycles. Four types of SAPs, labelled BF, JP, BJ and WT, with organic macromolecules were mixed with sandy soils to give concentrations of 0%, 0.05%, 0.1%, 0.2% and 0.3%, with the aim of determining water retention and soil properties after amendment with the SAPs. Soil moisture increased by 6.2-32.8% with SAP application, while soil bulk density was reduced by 5.5-9.4% relative to the control, especially with a moderate water deficit when the relative soil moisture contents were about 40-50%. The largest increase in soil moisture and the greatest reduction in bulk density resulted from the WT treatment. The effects of SAPs on soil pH and EC were contrary. Soil available P increased slightly while available K significantly decreased, except following the first wetting and drying cycle. Available K increased with drying, but the opposite effect was observed for available P. Particular SAPs (JP and WT) seem more suitable under alternating dry and wet conditions. The effects on soil-water retention and other soil properties varied according to the structure of the SAP and soil moisture.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::fcdceb9a248d36cb8700e4c29db67fefTest
https://doi.org/10.1111/j.1475-2743.2010.00271.xTest

المؤلفون: Wenbo Bai, Abbie Kirkendall, Jay J. Shen, Joseph Greenway

المصدر: The American journal of hospicepalliative care. 33(3)

مصطلحات موضوعية: Gerontology, Male, Care setting, 03 medical and health sciences, 0302 clinical medicine, Medicine, Humans, 030212 general & internal medicine, Socioeconomic status, Hospice care, Aged, Aged, 80 and over, business.industry, Perspective (graphical), Hospices, General Medicine, Middle Aged, Home Care Services, Patient Discharge, Cross-Sectional Studies, Hospice Care, Socioeconomic Factors, 030220 oncology & carcinogenesis, Female, business, Nevada

الوصف: Investigating whether socioeconomic characteristics determine if hospice is received at home or in a medical facility is important to examine, considering most patients prefer to die at home. This study relied upon The State Inpatient Data of Nevada. A total of 19 206 discharges were analyzed from the data set between 2009 and 2013. The results indicate that increasingly patients are being discharged to home and overall socioeconomic characteristics appear to have less of an influence over whether hospice is received at home or in a medical facility. Further research on the perspectives of patients would provide insight into whether patients’ preferences or socioeconomic characteristics are more influential on where hospice services are received.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8cf878bec98160a25a0919674905288Test
https://pubmed.ncbi.nlm.nih.gov/25366183Test