22 research outputs found
HISTOPATHOLOGICAL EFFECTS OF CADMIUM EXPOSURE ON TESTIS TISSUE OF SWORDTAIL FISH, Xiphophorus helleri (Pisces: Poecilidae)
No full textHeavy metal contamination of the aquatic environment has drawn increasing attention as it may have devastating effects on the ecological balance of the recipient environment and a diversity of aquatic organisms. Cadmium (Cd) is one of the toxic heavy metals which is widely used in industry and is released into the aquatic system. This present study was done to investigate the histopathological effects of cadmium on testis tissue of swordtail fish (Xiphophorus helleri). Histological studies in testis of swordtails were made to assess tissue damage due to sublethal concentrations (0.1 ppm and 0.5 ppm) of Cd after 5 days of exposure. In this study, it is observed that Cd causes degeneration at seminiferous tubules, openings at spermatogenetic cells and clumping of primary and secondary spermatocytes
EFFECTS OF POLY(2-ETHYL-2-OXAZOLINE) EXPOSURE ON OVARY HISTOLOGY OF ZEBRAFISH (Danio rerio)
No full textPoly(2-oxazoline)s have been widely used in biomedical applications for the last years. They can mimick natural systems and they generally used as liposomes, drug and gene deliver and pseudopeptides. In this study histological effects of different doses (10 mg/L, 50mg/L) of poly(2-ethyl-2-oxazoline) on ovary tissue of zebrafish were investigated. After 5 days of administation, ovary tissues were dissected and histomorphological changes investigated under light microscope. Severe structural deformation in oocytes were monitored. Deterioration in germinal vesicle and openings at follicular epithelium, zona radiata and vitelline envelope were detected
HISTOPATHOLOGICAL CHANGES IN TESTIS OF THE SWORDTAIL FISH, Xiphophorus helleri (Pisces: Poecilidae) EXPOSED TO DELTAMETHRIN
No full textThis experiment was done in order to investigate the effects of deltamethrin on the testis tissue of swordtail fish. In this study, 90 swordtail fishes were examined in 2 experimental groups. Low (0.2 ppm) and high (0.4 ppm) sublethal doses of deltamethrin were added into the habitat of fishes which were sacrified after 72 hours. Tissues were dissected out, fixed in Bouin's fixative, stained with Hematoksilen & Eosin, and examined using light microscopy. It is observed that a low dose of deltamethrin in the testis of swordtail does not generate structural defect characteristics. Depending on increasing doses, numbers of mature sperm were significantly reduced, and degenerative changes in seminiferous tubules were observed. In conclusion, we can say that pesticide contamination affects the quality of sperm significantly
Cd and Pb Levels in the Soft Tissue of Black Mussel (Mytilus galloprovincialis) Collected from Marmara Sea, Pendik District Coastal Area, Istanbul, Turkey
No full textThe aim of this study was to determe cadmium and lead concentrations in the whole soft tissue of the black mussels (Mytilus galloprovincialis Lamarck, 1819) (n=60) caught from Pendik district coasts of Istanbul, Turkey. According to legal standards of Turkish Food Codex (TFC) and United Nations Environment Programme (UNEP) standards the level of Cd was low white that of Pb was high. The highest Pb concentration found in the whole soft tissue of mussels at S4 was 8.66 (February), 6.64 (January), 4.72 ppm Pb (July 2011) whereas in S5 it is 8.66 (November), 8.14 (February), 6.64 (October), 4.57 ppm (June 2012)
TRACE METAL LEVELS IN ABDOMINAL MUSCLE TISSUE OF FRESHWATER CRAYFISH (Astacus leptodactylus Eschscholtz, 1823) FROM IZNIK LAKE, BURSA, TURKEY
No full textThe freshwater crayfish (Astacus leptodactylus Eschscholtz, 1823) is a valuable and protected invertebrate species and the only native and dominant species in the big lakes of Turkey, such as Iznik Lake (Bursa, Turkey). In this study, bioaccumulation of some heavy metals (Zn, Cu, Cd, Pb) in abdominal muscle tissue of Astacus leptodactylus samples collected between November 2008 and December 2009 was examined. Heavy metal contents in muscle tissues were measured by AAS analysis. According to the obtained data, the levels of Zn, Cu, Cd and Pb for the studied samples were within normal ranges, and lower than all the recommended legal limits. The descending order of heavy metal concentrations found in crayfish is Zn>Cu>Cd>Pb. Heavy metal concentrations in freshwater crayfish samples were compared with the maximum permitted levels of heavy metals in seafood regulated by the EU, FAO and Turkish Food Codex limits. The results showed that there was no serious hazard in the samples in terms of the Zn, Cu, Cd and Pb values analyzed from Iznik Lake, Bursa, Turkey
Some oxidative stress parameters in heart tissue of Zebrafish (Danio rerio) caused by mancozeb
No full textThe potential toxic effects of mancozeb exposure on some antioxidant enzyme were investigated on heart tissue of zebrafish in this study. Zebrafish groups were exposed to different doses of mancozeb (Group A: 5 mgL(-1) and Group B: 7.5 mgL(-1)) for 120 hours. In this study, catalase (CAT) activity, malondialdehyde (MDA) level and total protein (TP) level were determined with spectrophotometer. Our results showed that CAT activity was found 2.541 +/- 0.771 mg L-1 in A group and 2.011 +/- 0.201 mg L-1 in B group in this study. CAT and MDA activity levels decreased in the experiment group according to control group. MDA levels were found 0.025 +/- 0.003 mg L-1 in A group and 0.025 +/- 0.003 mg L-1 in B group. TP levels were found 9.75 +/- 1.51 mg L-1 in A group and 10.18 +/- 0.32 mg L-1 in B group. TP levels increased in the all experiment groups according to control group. We observed that the changes in the CAT activity and MDA levels were time and as well as mancozeb dose dependent. As a result, mancozeb is a very toxic substance for zebrafish and other aquatic organisms
Evaluation of Oxidative Stress After Exposure to Different Doses of Deltamethrin and Cadmium in Swordtail Fish Gills
No full textIn the present study, deltamethrin, a pyrethroid insecticide, and cadmium were investigated for their potency to induce oxidative stress. and effects on antioxidant systems in gill tissue of Swordtail fish (Xiphophorus hellerii). Animals were exposed to sublethal doses, of deltamethrin and cadmium for 72 hours except the control group. Protein, malondialdehyde (MDA), reduced glutathione (GSH) levels. and catalase (CAT) enzyme activities were determined. The results showed that total proteins MDA and GSH increased in each group, except for 0.2 ppm deltamethrin MDA and 0.1 ppm cadmium group where GSH was decreased. Catalase activity was decreased in all groups when compared to control group
Adverse Effect of Different Exercise Types on Ovarian Reserve
No full textIn this study, it was aimed to determine the negative effect of different types of exercise on ovarian reserve of sedentary women. A total of 40 sedentary women who met the criteria for admission to work were categorized as aerobic exercise (AE; n:20; age: 33.0±2.0 years old) and strength exercise (SE; n:20; age: 32.7±2.1 years old) groups. Participants in both groups received two different exercises of 60-minute with an intensity of 60-70% for 16 weeks and 4 days per week. Participants' anthropometric (body weight, BMI, waist and hip circumference, waist and hip rate (WHR)), estradiol (E2), luteinizing hormone (LH) follicle stimulating hormone (FSH), and levels antimülerian hormone (AMH), which used as over-reserve indicators, were measured for before and after exercise. Comparisons of these parameters were evaluated at p0.05). In the SE group, there was a decrease in AHM level (p0.05). As a results; strength exercise triggers to decrease in serum AMH levels and to increase in serum FSH levels. For this reason, strength exercise practices can have negative consequences for fertility, especially for women with lower ovarian reserve values
Author Identification with Chicken Swarm Optimization Algorithm and Adaboost Approaches
No full textAuthor identification takes an important place in Natural Language Processing (NLP). Each written document carries the trail of its author. In this study, we aim to realize the author identification via the traces belonging to author be retrieved from the text. A raw dataset was created with 25 columnists and randomly selected 2024 texts from different newspapers in the Turkish language. A dataset with character and lexical features with natural language processing methods were prepared over the raw dataset. The feature selection process was realized with the combination of the Chicken swarm optimization and the ensemble learning algorithms on the prepared dataset. The results were evaluated before and after the feature selection method was applied. The highest success rate with 93.99% was achieved when Adaboost with J48 algorithm was applied after the feature selection process carried out
Evaluation of blood metal levels of hockey teams after playing on synthetic turf fields
No full textBackground
Artificial turf fields are widely used as an alternative to natural grass in many areas such as parks, playgrounds, and playing fields. In this study, we aimed to evaluate the toxicological effects of the chemicals contained in the fields consisting of artificial turf and crumb rubber on the blood metal levels in field hockey players.
Methods
A cross-sectional study was conducted involving 28 apparently healthy men aged 20-25 years who participated in this study voluntarily. They consisted of 17 field hockey athletes [athlete group (AG)] and 11 sedentary males [control group (CG)]. Before and after the 7-day tournament, blood samples were taken from AG and CG to measure mercury, arsenic, aluminum, lead, zinc, magnesium and iron levels. An independent t-test was used to analyze the data.
Results
In comparisons between CG and AG, the magnesium level of AG before the tournament was higher, while the iron and mercury levels were significantly lower (p<0.05). In intragroup comparisons, a significant increase was observed in the post-tournament magnesium and iron variables in the AG group (p<0.05). In post-tournament intergroup comparisons, increases in the Mg and decreases in the Hg variables of AG were significant (p<0.05).
Conclusion
It is thought that as a result of the tournament on fields with synthetic grass surfaces, the male field hockey players in the 20-25 age group were toxicologically not affected by the harmful heavy metals present in these fields, because the Hg, As, Pb, Zn, Al, Fe, and Mg levels are within the international reference ranges
