جستجوی مقالات مرتبط با کلیدواژه « کبد » در نشریات گروه « مهندسی دریا »

This study determined the concentrations of mercury, lead, cadmium and arsenic in the muscle and liver of Liza klunzingeri from Khuzestan province. In this study, 18 samples of L. klunzingeri were collected from Hendijan seaport in winter. The concentrations of heavy metals were obtained by atomic absorption spectrometry (Perkin Elmer 4100). The average length and weight of L. klunzingeri were 18.77±0.95 cm and 78.27±3.68 g, respectively. Concentration of Hg, Cd, Pb and As in muscle of L. klunzingeri were 0.033±0.009, 0.171±0.017, 0.265±0.009, 0.092±0.008 mg kg-1 dry weight. Also, the amounts of these toxic metals in L. klunzingeri were 0.052±0.009, 0.224±0.011, 0.323±0.017, 0.160±0.008 mg kg-1 dry weight, respectively. The mercury, cadmium, lead and arsenic concentrations in liver of L. klunzingeri were higher than their levels in muscle. In this study, there was no significant positive correlationbetweenconcentration of Hg, Cd, Pb and As with length and weight in muscle of Liza klunzingeri (P<0.05).Accumulation ofHg, Pb and As in muscle of Liza klunzingeri was lower than the WHO, FDA and NHMRC standards, but concentration of Cd was higher than the NHMRC standards.

One of the toxic pollutants in aquatic ecosystem is heavy metals. This study aims to elucidate the toxic impact of zinc on the structure of gill and liver in silver carp (Hypophthalmichthys molitrix). This study was conducted at spring 1390 at the International Sturgeon Research Institute. In this study, after adaptation, 135 fish with the length of 13±1 cm and the weight of 50±10gr were put in one control group and 2 treatment groups contained 0, 5, and 10mg/L (Zn (NO) 3)2 in 90 liter aquariums. Fish were sampled at 12, 24, 48, 72 and 96 hours. The samples of gill and liver in each treatment were immediately fixed in Bouin solution and 5μ sections were stained by Hematoxylin-Eosin general staining method. In histological study of gills, epithelial cell hyperplasia was encountered, that had increased with high metal densities. Initially lamella cells wrinkled and change of formation was observed in chloride cells. This lesion enhanced in higher densities. Fish liver exposed to zinc showed atrophy,cloudiness, swelling, hyperemia, vacuolation and necrosis. These hepatic alterations were more evident in fish exposed to high metal densities. In conclusion, the present study showed that histopathology of liver and gill in silver carp, is a useful biomarker for environmental pollution, since it discriminated between reference and test sites.

Oxytetracycline (OTC) is the only form of tetracycline compounds which is approved by FDA to be used for prevention and treatment of aquatic animals’ diseases. The aim of this study was to determine the amount of OTC residue in muscle and liver of Common carp (Cyprinus carpio) by high performance liquid chromatography (HPLC) using single dose method. 12 fishes were divided into 4 treatments and each treatment was divided into 3 replicates. Regarding the weight range of fishes   ( 40-80 g ) and also the injectable OTC dosage rate of  25-50 mg/kg in accordance with aquatic animals pharmaceuticals ,0.04 ml of injectable solution of OTC was intramuscularly injected, then muscle and liver were sampled from fishes after 6, 24, 48 and 72 hours. Measurement of OTC residues was carried out by HPLC after solid phase extraction (SPE). The highest recorded concentrations in muscle and liver were observed in 6hr and 24hr after injection respectively (3.37μg/g and 17.37μg/g). The lowest concentrations in muscle and liver belonged to 72hr after injection (0.29μg/g and 9.52μg/g respectively). The results indicated that OTC concentrations descend in muscle from 6th to 72th hour. But in liver, because of OTC redistribution, drug concentration increases significantly after 24hr (P<0.05), then it decreases after 48 and 72hr.

This research was performed in order to survey the histochemical and histological factors of female Mullie  ovary and liver ( Pociliae sphenops)on three groups(adult, preadult and immature) in 2008 at laboratory complex of Science and ResearchUniversity. Then 10 numbers of each group(totally 30) were evaluated to determine the histochemical factors(liver and ovary protein and lipid). The tissues were kept in -70 ċ to do the rest of experiments. Also 12 numbers were surveyed to do the histological process and observation by light microscope(Hematoxilin-Eosin, Von- kossa for calcium and Sudan- Black B for lipid). According to statistical analysis, protein and lipid percentages of ovary tissue on three groups, adult(4-month-old), preadult(3-month-old) and immature(1.5- month-old) revealed the significant variation(P<0.05) and immature, preadult and adult groups had respectively the most and least lipid and protein percentages of ovary. The significant variations (P<0.05) also were seen by liver protein and lipid. The immature livers protein was higher than preadults and adults. The measurement of liver total lipid showed that preadult lipid was more than adult and immature. Calcium staining in both liver and ovary tissues expressed that this element will increase during growth and development.