Fahri Karayakar

• Mersin University

The aims of this study were to investigate the accumulation (15 days) and elimination (15 and 30 days) of cadmium (Cd) in the liver, gill, kidney and muscle of Oreochromis niloticus following exposures to different concentrations (1 and 2 mg/L) of Cd at different water temperatures (20, 25, 30 oC). Additionally, responses of oxidative stress biomar...

In this study, heavy metal (Cu, Zn, Cr, Cd, Pb and As) levels in the muscle of economically important fish species (Trachurus mediterraneus, Sparus aurata and Pegusa lascaris) living in different water columns in the North-East Mediterranean Sea were measured. Fish were bought from local fishermen between September 2016-August 2017 in Karataş regio...

Background Liver has an important role in the initiation and progression of multiple organ failure that occurs in sepsis. Many natural active substances can be used to reduce the liver injury caused by sepsis. For this aim, the effects of myricetin and apigenin on mice model of acute liver injury was evaluated in this study. Methods and results Th...

In this study, accumulation of aluminium (Al) in the gill, liver and muscle of Oreochromis niloticus were determined following exposure to Al (0, 1, 2 and 4 ppm) alone and in combination with chitosan (10 ppm) for 7, 14 and 21 days. Aluminium concentrations in the tissues were measured by ICP-MS. There were no fish mortality and apparent morphologi...

This study was intended to determine the lead accumulation levels in liver, gill, kidney, brain, and muscle tissues of Clarias gariepinus (African sharp tooth catfish) under the sole effect of lead (1.0 and 2.0 ppm) and combined with EDTA (Ethylene diamine tetraacetic acid) (2.0 and 4.0 ppm) for 7, 15, and 30 days. Inductively coupled plasma mass s...

The present study aimed to determine the zinc accumulation levels in the gill, liver, and muscle tissues of Cyprinus carpio (Linnaeus, 1758) under the effect of zinc (2.0 and 4.0 ppm) and zinc + EDTA (2.0 + 4.0 and 4.0 + 8.0 ppm) for 7, 15, and 30 days and the effects of EDTA on zinc accumulation in tissues. Tissue zinc levels were determined by in...

Approximately 350–400 million people in the world have Hbs Ag (hepatitis B virus surface antigen) positivity. In the international guidelines, the permanent suppression of replication in chronic hepatitis B virus (HBV) infection therapy is reported as the primary therapeutic goal. Trace elements play a key role in liver diseases. The aim of our stu...

z: Bu araştırmada Mersin Körfezinden örneklenen, tüke-time sunulan ve ekonomik öneme sahip Scomber japo-nicus, Caranx rhoncus, Pegusa lascaris türlerinin so-lungaç, karaciğer, böbrek, dalak ve kas dokularındaki Zn, Cu, Pb ve Cd düzeylerinin belirlenmesi amaçlan-mıştır. Doku metal düzeylerinin belirlenmesinde Ato-mik Absorbsiyon Spektrofotometrik yö...

z: Bu araştırmada Mersin Körfezinden örneklenen, tüke-time sunulan ve ekonomik öneme sahip Scomber japo-nicus, Caranx rhoncus, Pegusa lascaris türlerinin so-lungaç, karaciğer, böbrek, dalak ve kas dokularındaki Zn, Cu, Pb ve Cd düzeylerinin belirlenmesi amaçlan-mıştır. Doku metal düzeylerinin belirlenmesinde Ato-mik Absorbsiyon Spektrofotometrik yö...

Giriş: İnsan aktiviteleri sonucu çevreye katılan ağır metaller ekolojik döngüler sonucu başlıca alıcı ortamları oluşturan sucul ekosistemlere taşınırlar. Yarılanma ömürlerinin uzun ve katılımın sürekli olması, ortamda yer alan canlılarda birikim ve besin zinciri aracılığı ile de üst trofik düzeylere iletimini arttırır. Bu durum çevre ve insan sağlı...

The copper accumulation in liver and gill tissues of Oreochromis niloticus, exposed to 2 ppm Cu and 1g/L clinoptilolite singly and to the same concentrations of their mixture over 24, 48, 72 and 96 hours was studied. ICP-AES spectrophotometer techniques were applied in determining tissue copper levels. Statistical evaluation of the experimental dat...

Aim: In this study, the relationship of liver tissue trace element concentrations with hepatitis B disease and the effects of several environmental factors were analysed. Method: The liver tissue concentrations of Al, Fe, Cd, Mn, Cr, Cu, Pb, Ni, Zn, Ag, and Co were evaluated in 92 patients with hepatitis B using the Inductively Coupled Plasma -...

z: Bu araştırmada Mersin Körfezinden örneklenen, tüke-time sunulan ve ekonomik öneme sahip Scomber japo-nicus, Caranx rhoncus, Pegusa lascaris türlerinin so-lungaç, karaciğer, böbrek, dalak ve kas dokularındaki Zn, Cu, Pb ve Cd düzeylerinin belirlenmesi amaçlan-mıştır. Doku metal düzeylerinin belirlenmesinde Ato-mik Absorbsiyon Spektrofotometrik yö...

Effects of sub-lethal concentrations of copper and lead on hematocrit and mean cell volume (MCV) levels and on erythrocyte numbers, erythrocyte and erythrocyte nucleus areas were determined after exposing Oreochromis niloticus to 4 ppm Cu and 0.2 ppm Pb over 7, 15 and 30 days. Micro-hematocrit methods were adopted in determining hematocrit levels a...

Effects of Zn and Cd on condition factor (CF), hepatosomatic (HES) and gonadosomatic (GSI) of Oreochromis niloticus, after exposing the animals to 10 % of their LC50 values, namely 6.0 ppm Zn and 1.6 ppm Cd, over 7, 15, and 30 days. Standard mathematical formulations were used in determining the mentioned parameters. Cadmium, which is a toxic metal...

The aim of this study was to see whether the taurine (TAU), alpha-lipoic acid (LA), curcumin (CUR), and N-acetylcysteine (NAC) protection against oxidative stress caused by heavy metals is owed to the metal-decreasing or antioxidative effect. In this context, liver and kidney tissues of common carp (Cyprinus carpio carpio L.) were exposed in vivo t...

Total metal accumulation and the levels of total protein and glycogen were measured in Pulaemonetes pugio after exposing the animals to 0.05, 0.1 and 0.2 ppm concentrations of chromium over 1,7 and 15 days. Metal accumulation in tisuues was measured using atomic absorbtion spectrophotometric techniques and the levels of total protein and glycogen w...

We investigated the muscle tissue of a teleost Cyprinus carpio L. to find out whether N-acetylcysteine (NAC), alpha-lipoic acid (LA), taurine (TAU), and curcumin (CUR) were able to counteract oxidative stress induced by acute exposure to cadmium (Cd). The muscle tissue was dissected 96 h after a single intraperitoneal injection of Cd (5 mg kg(-1))...

Accumulation of chromium (VI) in hepatopancreas, gill and muscle tissues of Callinectes sapidus was studied after exposing the animals to 1.0, 2.0 and 4.0 ppm chromium (IV) over 96 hours. Tissue levels of the metal were determined using Atomic Absorbtion Spectrophotometric (AAS) methods. No mortality was observed in any concentration of chromium af...

We investigated the muscle tissue of a teleost Cyprinus carpio L. to find out whether N-acetylcysteine (NAC), alpha-lipoic acid (LA), taurine (TAU), and curcumin (CUR) were able to counteract oxidative stress induced by acute exposure to cadmium (Cd). The muscle tissue was dissected 96 h after a single intraperitoneal injection of Cd (5 mg kg-1) an...

The effects of cadmium on sera glucose and cortisol levels of Clarias gariepinus was studied after exposing the animals to 0.25, 0.50 and 1.00 ppm Cd over 30 days. An autoanalyser was used in determining sera parameters. Sera glucose levels showed no significant difference between the control and 0.25 and 0.50 ppm Cd exposed fish whereas 1.00 ppm c...

Accumulation of copper in liver, gill and muscle tissues of Anguilla anguilla was studied after exposing the animals to 1.00, 2.00 and 4.00 ppm Cu over 96 h period. The levels of metals in the studied tissues were determined using atomic absorption spectrophotometric techniques. All the copper concentrations tested increased the tissue levels of th...

The aim of the present study was to determine the levels of cadmium, copper, zinc and chromium in the liver, gill and muscle tissues of some pelagic, benthopelagic and benthic fish species caught from Mersin Gulf and sold at Karaduvar Harbor. Pelagic species Sardinella aurita (Clupeidae), Liza ramado (Mugilidae), benthopelagic species Diplodus annu...

Modern coastal areas have natural and transported rocks (armourstone) on which various types of organisms live. Burrowing, boring and feeding by these organisms can destroy or modify the coastal rocks and hence change the coastal morphology. Two rock types and three dominant types of organisms have been studied in Mersin Bay, Eastern Mediterranean...

Levels of copper, zinc, cadmium, chromium and lead were determined in the gill, hepatopancreas and muscle tissues of Brachidontes pharaonis collected from the Mersin coasts of Turkey. Water and animal samples were collected monthly from the four stations between June 2002 and May 2003 for metal determinations. Metal levels in water samples of Mersi...

Natural resistance frequency and plasmid based resistance of Enterobacteriaceae members Escherichia coli, Klebsiella sp. and Proteus sp. which isolated from Sparus aurata against the III rd generation cephalosporins Cefazol (CF), Ceftizoxime (ZOX) and Ceftriaxone (CRO) antibiotics were studied. Sparus aurata were caught from the Mersin fishermen's...

Natural resistance frequency and plasmid based resistance of Enterobacteriaceae members Escherichia coli, Klebsiella sp. and Proteus sp. which isolated from Sparus aurata against the IIIrd generation cephalosporins Cefazol (CF), Ceftizoxime (ZOX) and Ceftriaxone (CRO) antibiotics were studied. Sparus aurata were caught from the Mersin fishermen's s...

This study investigated the water samples collected from Mersin fishing pier, Karaduvar, Çeþmeli and Taþucu stations located on Mersin shore line. Escherichia coli isolated from water samples collected from above mentioned stations were investigated for the frequency of their natural resistancy against the third generation antibiotics Sefazol (CF),...