A novel electrochemical sensor based on MnCO3 nanostructures incorporated into carbon fibers (MnCO3NS/CF), including a molecularly imprinting polymer (MIP), was developed for the determination of Ochratoxin A (OTA). In this study, a sensitive and selective sensor design for OTA detection was successfully performed by utilizing the selectivity and catalysis properties of MIP and the synthesized MnCO3NS/CF material at the same time. MnCO3 nanostructures incorporated into carbon fibers were first characterized by using various analytical techniques. The sensor revealed a linearity towards OTA in the range of 1.0 × 10−11–1.0 × 10−9 mol L−1 with a detection limit (LOD) of 2.0 × 10−12 mol L−1. The improved electrochemical signal strategy was achieved by high electrical conductivity on the electrode surface, providing fast electron transportation. In particular, the analysis process could be finished in less than 5.0 min without complex and expensive equipment. Lastly, the molecular imprinted electrochemical sensor also revealed superior stability, repeatability and reproducibility.

In this study, it was aimed to evaluate total sialic acid (TSA), paraoxonase activity (PON1), malondialdehyde (MDA) and some serum biochemical parameters in cows with subclinical paratuberculosis. Paratuberculosis (PT) test was performed on 500 cows aged 2-6 years by ELISA method. Twenty-four cows diagnosed with paratuberculosis constituted the PT group and 12 healthy cows constituted the control group. According to the results, alanine aminotransferase (ALT), aspartate aminotransferase (AST) and UREA levels were found to be statistically higher (p <0.05) in the group with paratuberculosis compared to the control group. Iron (Fe) levels were found to be lower than the control group (p> 0.05). Compared to the control group, there was a decrease in PON1 activity and a significant increase in TSA and MDA levels in the PT group (p <0.05). In conclusion, in subclinical paratuberculosis infection, the long incubation period and the absence of clinical findings until advanced stages constitute a handicap. However, our findings show that the determination of lipid peroxidation (MDA), PON1 activity and TSA concentration caused by the inflammatory and oxidative stress state caused by the infection can be used as new biomarkers for this infection.

Alpha cypermethrin (α-CYP) is an insecticide, a member of the group of synthetic pyrethroid pesticides. This study aims to assess the histopathological and biochemical subacute effects of α-CYP on the renal tissues of 48 male Spraque–Dawley adult rats. In this study, the rats were divided into six groups: control, α-CYP (10 mg kg−1), α-CYP (20 mg kg−1), caffeic acid phenethyl ester (CAPE) (10 µmol kg−1), α-CYP + CAPE (10 mg kg−1), and α-CYP + CAPE (20 mg kg−1) groups. The percentage of weight gain was found to be dose-dependent on α-CYP in all groups. As a result of exposure, the normal histological structure of renal tissue was also observed in the control and CAPE groups, while glomerular atrophy and haemorrhage, enlargement of Bowman capsule, glomerular lobulation, and degeneration in distal and proximal tubules were noted in the α-CYP-treated groups with an increased frequency and severity in parallel with the dose increase. Although the severity and intensity of lesions decreased in the α-CYP + CAPE groups, they were statistically insignificant (p > 0.05). A decrease in the antioxidant parameter levels and an increase in oxidant parameters were observed in parallel with the negative effects of the antioxidant system in the α-CYP-treated groups. The groups exposed to CAPE in combination with α-CYP exhibited a therapeutic trend towards normalization in biochemical parameters due to the antioxidant character of CAPE. However, considering the statistical difference between the groups treated with α-CYP alone and CAPE alone, it was observed that the therapeutic features of those chemicals were not robust.

Carbon tetrachloride (CCl4) is a xenobiotic compound with toxicological action. It is absorbed by gastrointestinal system, respiratory system, and skin. The studies have reported that many countries have used Ganoderma lucidum (GL, Reishi Mushroom) as a medicinal plant against liver diseases induced by hepatotoxic agents such as CCl4 for more than thousands of years and is used for many diseases, including cancer since it is thought that it increases resistance against them and treats them. In the present study, immunohistochemical localization and expression of cyclooxygenase-2 (COX-2) by administrating carbon tetrachloride and Ganoderma lucidum in adult rats were examined. In the study, 32 adult Spraque-Dawley male rats that were 8-10 weeks old were used. Rats were divided in 4 groups as control, CCI4, Ganoderma lucidum (GL), and CCI4+GL. As a result of the experimental applications, the liver tissue was found to be normal in the control and GL groups, and multifocal necrosis areas, hepatocellular degeneration, cell infiltration, sinusoidal dilatation, and congestion were observed in the central and portal areas in CCI4 group. In the CCI4+GL group, decreases were observed in lesion severity and density. COX-2 immunoreactivity was detected more common in hepatocyte cytoplasm in the area from the central vena to the Kiernan space, while it was observed as sporadic in the hepatocyte nucleus. While CCI4 caused a decrease in total antioxidant level (TAS) in blood plasma samples, it caused an increase in total oxidant level (TOS), Aspartate aminotransferase (AST), and alanine aminotransferase (ALT) levels.