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排序方式: 共有356条查询结果,搜索用时 203 毫秒
81.
Ahmed A. Nassr Kamran Hessami Elena D’Alberti Antonella Giancotti Nazlisadat Meshinchiasl Mark I. Evans Daniele Di Mascio Alireza A. Shamshirsaz 《黑龙江环境通报》2023,43(11):1425-1432
To evaluate obstetrical outcomes for women having late amniocentesis (on or after 24 weeks). Electronic databases were searched from inception to January 1st, 2023. The obstetrical outcomes evaluated were gestational age at delivery, preterm birth (PTB) < 37 weeks, PTB within 1 week from amniocentesis, premature prelabor rupture of membranes (pPROM), chorionamnionitis, placental abruption, intrauterine fetal demise (IUFD) and termination of pregnancy (TOP). The incidence of PTB <37 weeks was 4.85% (95% CI 3.48–6.56), while the incidence of PTB within 1 week was 1.42% (95% CI 0.66–2.45). The rate of pPROM was 2.85% (95% CI 1.21–3.32). The incidence of placental abruption was 0.91% (95% CI 0.16–2.25), while the rate of IUFD was 3.66% (95% CI 0.00–14.04). The rate of women who underwent TOP was 6.37% (95%CI 1.05–15.72). When comparing amniocentesis performed before or after 32 weeks, the incidence of PTB within 1 week was 1.48% (95% CI 0.42–3.19) and 2.38% (95% CI 0.40–5.95). Amniocentesis performed late after 24 weeks of gestation is an acceptable option for patients needing prenatal diagnosis in later gestation. 相似文献
82.
Kani Alexander Nti Dovi Evans Mpatani Farid Mzee Aryee Aaron Albert Han Runping Li Zhaohui Qu Lingbo 《Environmental Chemistry Letters》2022,20(1):705-729
Environmental Chemistry Letters - The direct discharge of untreated contaminants into global water systems has jeopardized our water security worldwide. This environmental concern has prompted... 相似文献
83.
84.
Honoria Kwok Jeffrey Yan Pamela Brunswick Mark McMaster Marlene Evans Marcus Kim 《Environmental Forensics》2020,21(1):87-98
AbstractA saponification extraction method with gas chromatography pseudo-MRM (pMRM) mass spectrometry detection was developed for the determination of 50 total polycyclic aromatic hydrocarbons (TPAH50, a combination of parent and alkylated homologues) in biota. The method was aimed at monitoring and identification of potential TPAH contaminants in bitumen impacted environments. Alkylated PAHs were determined by multi-level, quantitative calibration using parent PAHs. The developed and thoroughly validated method required only one injection for TPAH50 analysis which represents significant saving of time and expensive authentic alkylated standards. The current method was tested with certified reference mussel tissue NIST 1974c and performed well. In a comparison study, the method reached a limit of quantitation (LOQ) for the TPAH50 between 0.1 and 0.2?ng g?1, while the QuEChERs enhanced matrix removal – lipid (EMR) kit produced by Agilent showed an LOQ of 5–10?ng g?1. The current method relied on response factors (RF) for the quantitation of alkylated PAHs determined against parent PAHs. These RFs were shown to be stable and consistent over the course of 1 year, during which over 200 routine environmental biota monitoring samples were analyzed. The environmental biota monitoring samples analyzed include muscle, carcass and liver, with an average total PAH50 concentration of 13, 90 and 135?ng g?1, respectively. Results show significant differences in the distributions of 1 ringed, 2 ringed, 3 ringed, 4 ringed, and 5+ ringed TPAHs between the types of biota samples. 相似文献
85.
Asiedu Benjamin Ampomah Gyamfi Bright A. Oteng Evans 《Environmental science and pollution research international》2021,28(36):49949-49957
Environmental Science and Pollution Research - Due to various environmental degradation and natural resource depletion around the world, researchers’ and policymakers’ attention has... 相似文献
86.
David G. Evans 《Environmental management》1994,18(3):321-329
The decision as to whether to recycle discarded objects or not has traditionally been made on a simple financial basis. However,
over the last few years a popular movement has sprung up which regards recycling as a good in itself, and this movement finds
itself at odds with the present financial basis for recycling. In this paper a rationale for recycling is worked out in an
attempt to resolve this conflict. It is concluded that the normal market signals do not provide a proper basis for recycling
decisions and that this market failure must be corrected by government intervention. However, this intervention should not
take the form of uncritical support for recycling. Rather the societal objectives of individual recycling proposals should
be identified and the proposal should then be evaluated in terms of whether it would achieve these objectives more effectively
than some alternative action. 相似文献
87.
This paper reports concentrations of mercury in muscle tissue of flounder (Platichthys flesus L.) from various estuaries and coastal waters of north Wales and north-west England that encompass the north-east Irish Sea. Mercury concentrations were highest within and offshore the Ribble Estuary (0.476 +/- 0.037 mg kg(-1)) but were also high within the Mersey (0.389+/-0.042 mg kg(-1)) and Dee Estuaries (0.295+/-0.065) and at coastal sites in the vicinity. Values for all three estuaries and their near coastal sites were significantly higher than for sites in the north and central sectors of the study area. Regressions of mercury concentration against fish length showed significant relationships and age accumulation for the majority of sites, particularly within or in close proximity to the Mersey, Dee and Ribble Estuaries. 相似文献
88.
Wu Jiying Abban Olivier Joseph Hongxing Yao Boadi Alex Dankyi Ankomah-Asare Evans Takyi 《Environment, Development and Sustainability》2022,24(8):10183-10207
Environment, Development and Sustainability - The vision of every country or subregions is to achieve economic growth and sustainable economic growth. Thus, the Economic Community of West African... 相似文献
89.
Allen S. Hope Shelly M. Evans 《Journal of the American Water Resources Association》1992,28(4):695-702
ABSTRACT: The Linacre (1988) model for calculating evaporation from open water or well-watered surfaces only requires inputs of air temperature, latitude and elevation, and windspeed if it is available. The model was developed using data collected at a large number of sites in different climatic regions of the world, while independent tests of the model have shown it to be suitable for estimating evaporation in a variety of locations. This study was intended to contribute to the broad goal of evaluating temperature-based evaporation models for use in California by testing the Linacre model in the agriculturally intensive Central Valley. Observed monthly mean reference evaporation (Eo) and meteorological data for periods ranging up to 72 months were obtained from 25 California Irrigation and Management Information System (CIMIS) stations distributed throughout the Central Valley. Uncalibrated and calibrated Linacre models were used to estimate monthly mean reference evaporation, and the performance of each model was evaluated using indices that quantified the random and systematic errors and overall model performance. The accuracy of the radiation and ventilation components of the model were evaluated separately. The uncalibrated model was found to systematically overestimate Eo with most of the model error being attributed to the ventilation component. Calibration of the radiation and ventilation components removed most of the systematic model errors, and the root mean square error for monthly mean Eo was 0.676 mm day?1 (16.8 percent of the mean observed value). (KEY TERMS: reference evaporation; Linacre model; irrigation scheduling.) 相似文献
90.