Yazar "Acet, H. Ahmet" seçeneğine göre listele

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    Hayvansal Dokularda I?nce-Tabaka Kromatografi? Yöntemi? ile Tetrasi?kli?n Rezi?düleri?ni?n Tayi?ni?
    (Selçuk Üniversitesi, 1989 Ocak) Acet, H. Ahmet; Demet, Ömer; Traş, Bünyamin
    This study was evaluated to determine by thin layer chromatography of their residues to be found in animal tissues of tetracycline group antibiotics, which were widely used in Veterinary field. It was used IN HCL and methanol in extraction of samples and an Amberlite XAD-2 resin colomn for clean-up. Slicagel 60 G, cellulose and slicagel HF 254 were applied as adsorbent. It was shown that cellulose was better result than others. Their recovery were approximetaly determined as 62 %, adding the tetracyclines at 0.5, 1.0 and 1.5 ppm concentrations to the tissues (muscle, liver, kidney) which was not found the tetracyclines residues. The analyse sensitivity of this system was 1.0 ppm for liver and 0.5 ppm for muscle and kidney. It was concluded that this method would be able to be used for determination of tetracyclines residues in animal tissues as routine.
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    Karbamat Grubu Pesti?si?tlerle Deneysel Zehi?rlenmelerde Zehi?ri?n I?ç Organlardan Ekstraksi?yonu, I?denti?fi?kasyonu ve Tayi?ni? Üzeri?nde Ki?myasal Araştırmalar
    (Selçuk Üniversitesi, 1985 Ocak) Acet, H. Ahmet
    It is fact that agricultural drugs, especially pesticides, have been used unconsciously in the regions where intensive agriculture is made in this country. Carbamate pecticides of these were studied to determine under our laboratory conditions. The identifications of carbaryl, baygon, mesurol, methomyl, matacil primicarbe and promecarbe of carbamate pecticides were made with thin-layer chromatograms. The spoted layers were developed with ten different solvent systems. Dibromoquinonchlorimide, ninhydrin, rhodamin B, rhodamin B- AgNO3, bromin - fluorescein reagents and UV light with short wave (254 nm) were used to determine the spots on the developed layers. The sensitivitiy limits and the color reactions of seven various carbamate pecticides were also determined with the aid of this reagents. Carbaryl, baygon and carbaryl+baygon mixture were given orally to ten rabbits and three dogs in LD50 doses. After administering of the drugs was seen that all animals were died. Stomach intestine, liver, kidney and spleen of these animals were removed. After the results of our research was determinde the above stated chemical compounds in this organs. Carbamate pecticides were determinde at the levels of 0,5 µg or more with the aid of dibromoquinonchlorimid in this tissues samples on this laboratory conditions.
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    Sucuklarda N-Nitrozami?n Bi?leşi?kleri?ni?n Gaz Kromatografi?k Yöntemle Tayi?n Edi?lmesi?
    (Selçuk Üniversitesi, 1986 Ocak) Acet, H. Ahmet; Pirinçci, İbrahim; Batı, Bekir
    In this study, the levels of nitrosamines which can occur in 21 sausage samples provided from Elazığ, Konya, Kayseri and Ankara regions were investigated. NPyr was found in all that samples in the result of the analysis made by using gas chromatography with flame-ion-ization-detector. Whereas, NDMA, NDEA and NPip were determined in about 95% of samples analysed. The levels of nitrosamines determined in the sausage samples analysed were 5.1-370.0 ppb, 2.5-600.0 ppb, 6.5-200.0 ppb, and 1.4-125.0 ppb for NDMA, NDEA, NPyr and NPip respectively. According to the density groups, fourty-one %41, 17.95%, 10.26%, 6.41%, 6.41%, 6.41%, 7.69%, 2.56% 1.28% of the levels found for four nitrosamine derivatives were determined to be between 1.1-20.0 ppb, 20.1-40.0 ppb, 40.1-60.0 ppb, 60.1-80.0 ppb, 80.1-100.0 ppb, 100.0-150.0 ppb, 150.0-200.0 ppb, 200.1- 400.0 ppb, 400.1-600.0 ppb respectively. In conclusion, it can be said that the occurence of nitrosamine derivatives in the levels, which can produce canserogenic effect in some samples, is due to the adding of the compounds with nitrate nitrite to these samples.
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    Yem ve Yem Maddeleri?nde Aflatoksi?n, Okratoksi?n A ve Zearalenon Kalıntılarının Kromatografi?k Yöntem ile Araştırılması
    (Selçuk Üniversitesi, 1989 Ocak) Acet, H. Ahmet; Demet, Ömer; Traş, Bünyamin
    This investigation was conducted to determine the levels of aflatoxins, ochratoxin A and zearalenone in feeds and feedstuffs obtained from various regions of Turkey. Samples were analysed by thin layer chromatography. In this method, mycotoxins were extracted with chloroform from materials and then tranfered through the sep-pak cardrige coloumn to elute the mycotoxins residues. Mycotoxins were found in the nine samples of a hundred materials analysed. Aflatoxin B, in two samples, ochratoxin A in five samples and zearalenone in three samples were determined. The average concentrations of aflatoxin B?, ochratoxin A and zearalenone were 3.75., 12 and 6,6 microgram/kg respectively. The detectable limits were 1 microgram/kg for aflatoxin, 2 microgram/kg for ochratoxin A and 4 microgram/kg for zearalenone. According to results, the levels mycotoxins determined in the samples will not cause an extremely cases, however would make residue problems with consumption of these feeds by the animals for a long periods.