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1.
Isiksel Ecem Attar Azade Mutlu Ozge Altikatoglu Yapaoz Melda 《Environmental science and pollution research international》2023,30(1):161-171
Environmental Science and Pollution Research - In this study, bioinspired fabrication of copper oxide nanoparticles (CuONPs) which are widely researched in nanotechnology field with Cotoneaster... 相似文献
2.
Erhan Mutlu 《Marine Biology》2006,149(3):573-584
Swimming trajectories of chaetognaths Sagitta setosa Müller in the Black Sea were studied using an echosounder operating at 120 and 200 kHz and an acoustic Doppler current profiler (ADCP) operating at 150 kHz. S. setosa were acoustically discriminated with respect to vertical migration and swimming speed, according to dissolved oxygen (DO) concentration and the timing of migrations. S. setosa formed a concentration layer thicker than Calanus euxinus did (1–3 m). The migration was completed in about 2.5–4 h, upward migration starting before C. euxinus and downward migration after C. euxinus. Adult Sagitta swam fast only in the well-oxygenated layer (subsurface maximum DO). The DO was found to be a significant (p<0.05) variable by partial correlation between the speed and hydrographical parameters. This feature constituted an oxygen-dependent influence on S. setosa’s vertical swimming and distinguished S. setosa from C. euxinus. Chaetognaths migrated daily between the nearsurface and the oxycline or the suboxic zone (OMZ, see Fig. 3b for the layers characterized by DO). Whether the deepest depth limit of migration was the oxycline or the OMZ depended on the relative abundance of adult and immature (young) individuals in the concentration layer. In July and September, individuals belonging to a new generation did not migrate but stayed in subsurface water day and night. 相似文献
3.
Margaret E. Elmes MB BS PhD J. Clarkson PhD J. Gwyn Jones PhD 《Environmental geochemistry and health》1983,5(2-3):85-87
The zinc content of intestinal epithelial cells in human jejunum and ileum has been measured using X-ray microanalysis. The range of values was wide, the highest being found in stem cells and enterocytes. Significant differences were found in jejunum from gastric carcinoma patients and ileum from Crohn's disease patients compared with patients with non malignant, non inflammatory disease. 相似文献
4.
Capareda SC Boriack CN Mukhtar S Mutlu A Shaw BW Lacey RE Parnell CB 《Journal of the Air & Waste Management Association (1995)》2005,55(7):999-1006
Controlled bench-scale laboratory experiments were conducted to evaluate the recovery of ammonia (NH3) and hydrogen sulfide (H2S) from dynamic isolation flux chambers. H2S (80-4000 ppb) and NH3 (5000-40,000 ppb) samples were diffused through the flux chamber to simulate ground level area source emissions while measuring the inlet and outlet flux chamber concentrations simultaneously. Results showed that the recovery of H2S during a 30-min sampling time was almost complete for concentrations >2000 ppb. At the lowest concentration of 80 ppb, 92.55% of the H2S could be recovered during the given sampling period. NH3 emissions exhibited similar behavior between concentrations of 5000-40,000 ppb. Within the 30-min sampling period, 92.62% of the 5000-ppb NH3 sample could be recovered. Complete recovery was achieved for concentrations >40,000 ppb. Predictive equations were developed for gas adsorption. From these equations, the maximum difference between chamber inlet and outlet concentrations of NH3 or H2S was predicted to be 7.5% at the lowest concentration used for either gas. In the calculation of emission factors for NH3 and H2S, no adsorption correction factor is recommended for concentrations >37,500 ppb and 2100 ppb for NH3 and H2S, respectively. The reported differences in outlet and inlet concentration above these ranges are outside the fullscale sensitivity of the gas sensing equipment. The use of 46-90 m of Teflon tubing with the flux chambers has apparently no effect on gas adsorption, because recovery was completed almost instantaneously at the beginning of the tests. 相似文献
5.
E. Mutlu 《Marine Biology》1999,135(4):603-613
The distribution of Mnemiopsis leidyi Agassiz, 1865 in the Black Sea was determined using plankton samples collected above the anoxic zone (maximum depth 200 m)
in the summer, winter, and spring from 1991 to 1995. Distribution was patchy. Average biomasses of 15 to 500 g m−2 were measured, and abundances varied from 10 to 180 ind m−2. Biomass and abundance peaked in winter, and there was a secondary peak in the summer. The distribution of M. leidyi was correlated with hydrographic features in the Black Sea with higher concentrations in anticyclonic gyres. The centers
of the two main cyclonic gyres generally had a low biomass of M. leidyi. From July 1992 to March 1995, the populations were largely offshore. M. leidyi were confined to the upper part of the mixed layer both day and night. Some individuals displayed a negative taxis to daylight
and were concentrated below the thermocline at night. Smaller M. leidyi (1.5 to 2 cm) were present in the winter, and individuals reached maximum size in the summer. Although reproduction was continuous
throughout the year, there were two distinct peaks: the larger peak in the summer and the smaller peak in the winter. Microscopic
analysis of stomach contents showed that copepods and molluscs form their main diet.
Received: 1 November 1997 / Accepted: 30 August 1999 相似文献
6.
Sergio C. Capareda Cale N. Boriack Saqib Mukhtar Atilla Mutlu Bryan W. Shaw Ronald E. Lacey 《Journal of the Air & Waste Management Association (1995)》2013,63(7):999-1006
Abstract Controlled bench-scale laboratory experiments were conducted to evaluate the recovery of ammonia (NH3) and hydrogen sulflde (H2S) from dynamic isolation flux chambers. H2S (80–4000 ppb) and NH3 (5000–40,000 ppb) samples were diffused through the flux chamber to simulate ground level area source emissions while measuring the inlet and outlet flux chamber concentrations simultaneously. Results showed that the recovery of H2S during a 30-min sampling time was almost complete for concentrations >2000 ppb. At the lowest concentration of 80 ppb, 92.55% of the H2S could be recovered during the given sampling period. NH3 emissions exhibited similar behavior between concentrations of 5000–40,000 ppb. Within the 30-min sampling period, 92.62% of the 5000-ppb NH3 sample could be recovered. Complete recovery was achieved for concentrations >40,000 ppb. Predictive equations were developed for gas adsorption. From these equations, the maximum difference between chamber inlet and outlet concentrations of NH3 or H2S was predicted to be 7.5% at the lowest concentration used for either gas. In the calculation of emission factors for NH3 and H2S, no adsorption correction factor is recommended for concentrations >37,500 ppb and 2100 ppb for NH3 and H2S, respectively. The reported differences in outlet and inlet concentration above these ranges are outside the full-scale sensitivity of the gas sensing equipment. The use of 46–90 m of Teflon tubing with the flux chambers has apparently no effect on gas adsorption, because recovery was completed almost instantaneously at the beginning of the tests. 相似文献
7.
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
8.
Halim Mutlu Nesibe K?se ünal Akkemik Duru Aral Ali Kaya Sturt W. Manning Charlotte L. Pearson Nüzhet Dalfes 《Regional Environmental Change》2012,12(3):559-570
Dendrochronological and oxygen–carbon isotopic analysis was conducted on tree rings collected at two different elevations from three different regions in western Anatolia, Turkey. Tree rings were sampled from Anatolian black pines (Pinus nigra Arn. subsp. pallasiana (Lamb.) Holmboe) of at least 200?years old through an N–S transect covering Bolu-Mengen (north), Kütahya–Simav, and Antalya–Alanya (south) forests. Cellulose was extracted from 5-year blocks of tree rings from lower to upper altitudes in each region. Dendrochronological site chronologies were built for each of the 6 sites, and response to climate was evaluated. The long-term δ13C chronologies comprising the period 1800–2008 strongly decline by an average of 2.5‰ from the mid-twentieth century, which corresponds with the commencement of industrialization in Turkey. Oxygen isotope (δ18O) time series show dominantly low undulations, although some high-frequency variations of up to 6‰ are also observed. As a result of latitude and continent effects, oxygen isotope values of tree rings show an average of 3‰ increase from south (Antalya) to the north (Bolu). Correlations between carbon isotope ratios yield high positive values indicating that industrial pollution exerts a major control on the δ13C systematics of the studied trees. Corrected δ13C ratios are mostly represented by strong positive responses to variations in temperature and precipitation, whereas δ18O and summer temperature/precipitation are negatively correlated. Tree-ring widths and δ18O display similar responses to the temperature and sensitivity to the climatic impact of historic volcanic eruptions, and changes in the solar irradiance record are also detected in other high-resolution paleoclimate archives for the region. 相似文献
9.
The levels of noise arise from mining industry seem to be higher when compared to other industries. For this reason, noise
exposure and noise-induced hearing loss (NIHL) are prevalent in mining. Assessment of noise emission levels that arise from
various mining operations is required to prevent and minimize the NIHL. Because the studies for preventing occupational hearing
loss among miners are inadequate, a quarry and stone crushing-screening plant was selected to generate site-specific data.
The noise levels of the environments in which workers work were measured and also a hearing test centre applied hearing tests
to the workers. According to the hearing test results, it was determined that the part of workers have hearing loss. The main
factors affecting the NIHL were assumed as experience, noise level, miners’ age and occupation, and by taking into account
the sub factors of the main factors, multi way contingency tables were prepared. Then hierarchical loglinear analysis method
was implemented to categorized data; thus, the probabilities might effect NIHL was investigated. At the end of this study,
it was found that the most risky occupation group was the drivers, and additionally, these workers were mostly exposed to
70–79 dB(A) noise level. When the important interactions are evaluated, it is determined that 4–11 years experienced crusher
workers have high probability of NIHL because of high exposure to 90–99 dB(A) noise level. Moreover, the most important interactions
which may affect the NIHL were identified and the precautions to reduce hearing loss were presented. 相似文献
10.