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排序方式: 共有218条查询结果,搜索用时 31 毫秒
61.
Alver Alper Baştürk Emine Kılıç Ahmet 《Environmental science and pollution research international》2021,28(13):15870-15882
Environmental Science and Pollution Research - Trihalomethanes (THMs), which is one of the major classes of DBP known to be highly cytotoxic and genotoxic, were formed and modeled under controlled... 相似文献
62.
Yilmaz Sevgi Külekçi Elif Akpinar Mutlu Başak Ertem Sezen Işık 《Environmental science and pollution research international》2021,28(45):63837-63859
Environmental Science and Pollution Research - Rapid migration to cities and the increasing demand for housing negatively affect living areas. Furthermore, uncontrolled population growth,... 相似文献
63.
Dihydropteridine reductase (DHPR) is an enzyme involved in the recycling of tetrahydrobiopterin (BH4), which is an obligate co-factor of the aromatic amino acid hydroxylases. DHPR deficiency is a rare, autosomal recessive disorder caused by mutations in the QDPR gene. DHPR-deficient patients are diagnosed by a lack of response to a low phenylalanine diet and by severe neurological symptoms. Final diagnosis is made by measurements of neurotransmitters and pterin metabolites in cerebrospinal fluid (CSF) and urine, in addition to DHPR enzyme activity, which can be assessed in whole red blood cells. Treatment of DHPR deficiency can be difficult and the outcome is not always satisfying, even if all treatment strategies are followed. Therefore prenatal diagnosis is of great importance in affected families. Prenatal diagnosis is possible by measuring DHPR activity in different cell types but this is time consuming. More than 25 different mutations have to date been identified in the QDPR gene and direct identification of a mutation in a fetus would be easy and rapid. We have developed a method based on denaturing gradient gel electrophoresis (DGGE) for the analysis of the QDPR gene. The method is useful for rapid and simultaneous scanning of all exons and flanking intronic sequences of the QDPR gene. We describe the first prenatal diagnosis conducted using this method. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
64.
Huseyin Yilmaz Kamil Bostan Nuri Turan Karlo Muratoglu Aysun Yilmaz Ayşe A. Ozkul Bekir Kocazeybek Christopher Helps 《Food and environmental virology》2010,2(2):64-68
Norovirus (NoV) is recognised as one of the most common causes of foodborne infections, and shellfish are a well-documented
source of this virus. The presence of NoV in shellfish has not previously been investigated in Turkey, and hence the aim of
this study was to determine the frequency of human NoV genogroups I and II in mussels collected from the Bosphorus, Istanbul,
Turkey. A total of 320 mussels representing 110 samples originating along the Bosphorus coast were collected from fish distributors.
RNA was extracted using the RNeasy Mini Kit and real-time RT–PCR performed using primers specific for NoV genogroup I and
II. Amongst the 110 samples, 5 (4.5%) were found to be positive for NoV genogroup II by SYBR Green assay; no genogroup I was
detected. A positive signal was obtained by SYBR Green for NoV Genogroup II in mussels collected in October, November and
December 2008, and February and July 2009. Only four out of five SYBR Green positive samples could be confirmed by the use
of a NoV GII probe-based real-time RT–PCR. The average count and SD of Enterobactericaeae, E. coli and sulphide reductase anaerobic bacteria in PCR positive mussels were 3.56 log ± 0.96 log, 2.32 log ± 0.77 log and 1.70
log ± 0.56 log, respectively. This study shows that NoV Genogroup II is present in mussels collected from the Bosphorus, Istanbul,
and may constitute a risk to human health. 相似文献
65.
Kubilay Gok Mayowa T. Babalola C. Lakshman John J. Sumanth Linh Chi Vo Stijn Decoster Anjali Bansal Ahmet Coşkun 《组织行为杂志》2023,44(1):157-175
Based on social cognitive theory (SCT), we develop and test a model that links ethical psychological climate to ethically focused proactive behavior (i.e., ethical voice and ethical taking charge) via two distinct mechanisms (i.e., duty orientation and moral potency). Results from multi-wave field studies conducted in the United States, Turkey, France, Vietnam, and India demonstrate that an ethical psychological climate indirectly influences employees' ethical voice and ethical taking charge behaviors through the dual mechanisms of duty orientation and moral potency. Additionally, we find that individuals' moral attentiveness strengthened these mediating processes. Together, these findings suggest that ethical psychological climate is an important antecedent of ethically focused proactive behavior by stimulating individuals' sense of duty and enhancing their moral potency, particularly when employees are already highly attuned to moral issues. 相似文献
66.
Akbulut Özen Songül Yesilkanat Cafer Mert Özen Murat Başsarı Asiye Taşkın Halim 《Environmental science and pollution research international》2022,29(48):72683-72698
Environmental Science and Pollution Research - In this study, the performance of the Sequential Gaussian Simulation (SGS) approach was studied with the aim of accurately determining local health... 相似文献
67.
Apaydın Aylin Kabaoğlu Hatice Apaydın Gökhan Şirin Murat Cengiz Erhan Köksal Oğuz Kağan Baltaş Hasan Tıraşoğlu Engin 《Environmental science and pollution research international》2022,29(5):7053-7066
Environmental Science and Pollution Research - In the present study, the concentration levels of heavy metals such as Mn, Fe, Ni, Cu, Zn, Cr, and Pb in sediment samples collected from 16 sampling... 相似文献
68.
Sandbars are critical to the cross-shore movement of sediment. Prediction of cross-shore sandbar volumes requires knowledge about the functional relationship of sediment transport rate conditions with waves, currents, base slope, sediment property and water depth. In this study, experiments on cross- shore sediment transport were carried out in a laboratory wave channel for initial base slopes of 1/8, 1/10 and 1/15. Using regular waves with different deep-water wave steepness generated by a pedal-type wave generator, bar volumes caused by cross-shore sediment transport are investigated for beach materials with the medium diameter of d50?=?0.25, 0.32, 0.45, 0.62 and 0.80 mm. A non-dimensional equation for sandbar volume was obtained by using linear and non-linear regression methods through the experimental data and was compared with previously developed equations in the literature. The results have shown that the experimental data fitted well to the proposed equation with respect to the previously developed equations. 相似文献
69.
Harmens H Norris DA Cooper DM Mills G Steinnes E Kubin E Thöni L Aboal JR Alber R Carballeira A Coşkun M De Temmerman L Frolova M González-Miqueo L Jeran Z Leblond S Liiv S Maňkovská B Pesch R Poikolainen J Rühling A Santamaria JM Simonèiè P Schröder W Suchara I Yurukova L Zechmeister HG 《Environmental pollution (Barking, Essex : 1987)》2011,159(10):2852-2860
In 2005/6, nearly 3000 moss samples from (semi-)natural location across 16 European countries were collected for nitrogen analysis. The lowest total nitrogen concentrations in mosses (<0.8%) were observed in northern Finland and northern UK. The highest concentrations (≥1.6%) were found in parts of Belgium, France, Germany, Slovakia, Slovenia and Bulgaria. The asymptotic relationship between the nitrogen concentrations in mosses and EMEP modelled nitrogen deposition (averaged per 50 km × 50 km grid) across Europe showed less scatter when there were at least five moss sampling sites per grid. Factors potentially contributing to the scatter are discussed. In Switzerland, a strong (r2 = 0.91) linear relationship was found between the total nitrogen concentration in mosses and measured site-specific bulk nitrogen deposition rates. The total nitrogen concentrations in mosses complement deposition measurements, helping to identify areas in Europe at risk from high nitrogen deposition at a high spatial resolution. 相似文献
70.
A detailed investigation of ambient aerosol composition and size distribution in an urban atmosphere
S. Levent Kuzu Arslan Saral Selami Demir Gülsüm Summak Göksel Demir 《Environmental science and pollution research international》2013,20(4):2556-2568
This research was executed between March 2009 and March 2010 to monitor particulate matter size distribution and its composition in Istanbul. Particulate matter composition was determined using ion chromatography and inductively coupled plasma optical emission spectrometry. The sampling point is adjacent to a crowded road and the Bosporus Strait. Two prevailing particulate modes are found throughout PM10 by sampling with a nine-stage low-volume cascade impactor. First mode in the fine mode is found to be between 0.43 and 0.65 μm, whereas the other peak was observed between 3.3 and 4.7 μm, referring to the coarse mode. The mean PM10 concentration was determined as 41.2 μg/m3, with a standard deviation of 16.92 μg/m3. PM0.43 had the highest mean concentration value of 10.67 μg/m3, making up nearly one fourth of the total PM10 mass. For determining the effect of traffic on particulate matter (PM) composition and distribution, four different sampling cycles were applied: entire day, nighttime, rush hour, and rush hour at weekdays. SO 4 ?2 and organic carbon/elemental carbon proportions are found to be lower in night samples, representing a decrease in traffic. The long-range transports of dust storms were observed during the sampling periods. Their effects were determined analytically and their route models were run by the HYSPLIT model and validated through satellite photographs taken by the NASA Earth Observatory. 相似文献