Comparison of four thin-layer chromatographic methods for the determination of aflatoxins in raisins   总被引：1，自引：0，他引：1  

D Boyacio?lu  M G?nül 《Journal of the Association of Official Analytical Chemists》1988,71(2):280-282

A study was conducted to determine the accuracy and precision of 3 AOAC methods, secs 26.026-26.031 (CB), secs 26.032-26.036 (BF), and secs 26.052-26.060 (cottonseed), and the Romer quantitative method for the thin-layer chromatographic (TLC) determination of aflatoxins B1, B2, G1, and G2 in raisins. The samples were spiked at a level of 10 micrograms total aflatoxins/kg. The TLC development systems were: ether-methanol-water (94 + 4.5 + 1.5) and chloroform-acetone (9 + 1). The interaction between the 4 methods and the 2 development systems was also studied. The average recoveries were 88, 80, 75, and 93% with coefficients of variation of 14.0, 10.4, 14.0, and 9.6% for aflatoxin B1 using the CB, BF, cottonseed, and Romer methods, respectively. Statistical analysis showed no difference in the results obtained using the 2 TLC development systems.  相似文献   

肉用品种羊与地方品种羊所产杂种羊生长发育及产肉性能测定与分析     

吕建民  李颖康  马青  云华  张晓辉 《中国草食动物》2005,25(5):14-16

用特克萨尔、萨福克、无角陶赛特三个肉用品种公羊杂交改良本地原有的滩羊，寒滩杂种羊，所产后裔在相同的饲养管理条件下．特杂去势周岁公羊活重71．87kg，萨杂均64．26kg，陶杂为64．20kg，分别比同龄、同性别的滩羊高113．90％、91．25％、91．07％；比小尾寒羊高73．18％，54．84％，54.07％。屠宰试验结果表明：三个类群肉用杂种羊屠宰后胴体重比滩羊高97．67％～126．70％，比小尾寒羊高68．40％～93．13％；屠宰率比滩羊高1．72～3．88个百分点，比小尾寒羊高4．19～6．35个百分点；活体净肉率比滩羊高2.21～4.72个百分点，比小尾寒羊高6．61～9．12个百分点；其它指标均显著高于本地滩羊和小尾寒羊，改良效果十分明显。  相似文献   

Note: Evaluating insecticides for the control of overwintered adults ofEurygaster integriceps under field conditions in Turkey     

Erhan Koçak  Numan Babaroğlu 《Phytoparasitica》2006,34(5):510-515

The Sunn pestEurygaster integriceps Puton is the most harmful pest of cereals in Turkey and the surrounding countries. Chemical control has been employed against the nymph stages of the pest. The efficacy of six products [acetamiprid (SL, soluble concentrate), chlorpyrifosethyl (EC, emulsifiable concentrate), lambda-cyhalothrin (CS, capsule suspension), monocrotophos (SC, suspension concentrate), thiacloprid (SC) and zeta-cypermethrin (EC)] was tested on overwintered adults ofE. integriceps, with applications to wheat at the shooting stage. In a study conducted at Siverek, Şanlıurfa in the southeastern Anatolia Region, the most effective insecticide was found to be lambda-cyhalothrin. It gave very promising results in controlling the pest and reduced subsequent egg laying and the appearance of nymphs in the trial area. The results showed that chemical control of overwintered adults of the Sunn pest in early spring is possible with lambda-cyhalothrin. http://www.phytoparasitica.org posting Sept. 18, 2006.  相似文献   

Determination of grafting compatibility of grapevine with electrophoretic methods     

Z. Gökbayrak  G. Söylemezoğlu  M. Akkurt  H. Çelik 《Scientia Horticulturae》2007

This study was carried out to determine the efficiency of electrophoretic methods in predicting graft incompatibility of grape cultivars with American rootstocks. Three isoenzyme systems (peroxidase, PER; esterase, EST; acid phosphatase, AcPH) and total protein profiles were obtained in 15 grape cultivars (Vitis vinifera L.) and 12 American rootstocks. Compatibility levels were determined by the band similarities. Field compatibilities were also calculated. Results showed that incompatibility exists between different cultivar–rootstock combinations. AcPH and total protein profiles of the cultivar–rootstock combinations could be suggested to use for forecasting graft incompatibility.  相似文献   

Dicofol resistance in Tetranychus cinnabarinus: resistance and stability of resistance in populations from Antalya, Turkey     

Dağli F  Tunç I 《Pest management science》2001,57(7):609-614

Resistance against dicofol was investigated in the carmine spider mite, Tetranychus cinnabarinus. Higher resistance levels were detected by leaf residual bioassays than by topical bioassays, both done using a Potter spray tower, in almost all populations of T cinnabarinus examined from Antalya, Turkey. For instance, the resistance level at LC₉₅ was 17.5‐fold in topical bioassays but 58.9‐fold in leaf residual bioassays for the population collected from greenhouses in the Topçular district. There were differences of resistance levels at LC₉₅, ranging between 2.6‐ and 23.9‐fold using topical bioassays and between 5.0‐ and 58.9‐fold in residual bioassays, in populations collected from greenhouses from various districts. Populations from cotton showed lower resistance levels against dicofol than populations from greenhouses. Resistance to dicofol at LC₅₀ as indicated by topical and residual bioassays increased 19.7‐ and 100.7‐fold, respectively, in a colony from the laboratory strain of T cinnabarinus selected with dicofol alone for 16 cycles. However, the dicofol resistance at LC₅₀ increased 19.4‐ and 52.0‐fold in another colony selected in rotation with dicofol and tetradifon for six and eight cycles, respectively. The changes in resistance to dicofol 5 months after the selection ceased were as follows: in the colony selected for dicofol alone, using topical and residual bioassays, the resistance levels at LC₅₀ decreased to 11.7‐ and 99.1‐fold, respectively, and in the colony selected in rotation with dicofol and tetradifon to 10.8‐ and 15.8‐fold, respectively. © 2001 Society of Chemical Industry  相似文献   

Ameliorative effects of dietary clinoptilolite on pathological changes in broiler chickens during aflatoxicosis   总被引：2，自引：0，他引：2  

Ortatatli M  Oğuz H 《Research in veterinary science》2001,71(1):59-66

The amelioration of aflatoxicosis in broiler chickens was examined by feeding two concentrations of natural zeolite (clinoptilolite). Clinoptilolite (ClI), incorporated into the diet at 1.5 and 2.5 per cent, was evaluated for the ability to reduce the deleterious effects of 2.5 mg total aflatoxin (AF) kg(-1)diet on growing broiler chicks from 1 to 21 days of age. A total of 360 broiler chicks were divided into six treatment groups [Control, AF, CLI (1.5 per cent), AF plus CLI (1.5 per cent), CLI (2.5 per cent), and AF plus CLI (2.5 per cent)] each consisting of 60 chicks. Compared to controls, the AF consuming chicks showed increases in the relative weights of liver and kidney; and gross-histopathologic hepatic lesions such as paleness, friability, diffuse hydropic degeneration and/or fatty change, bile-duct hyperplasia and periportal fibrosis. Glumerular hypertrophy, increases in the number of mesengial cells and hydropic degeneration of tubuler epithelium in kidneys of chicks fed diet AF alone were also observed. Atrophy and lymphoid depletion were seen in the thymuses and bursa of Fabricius from the chicks fed AF alone. The additions of CLI (1.5 and 2.5 per cent) to the AF -containing diet moderately (significantly in some cases) decreased the number of affected broilers and/or the severity of lesions. The addition of CLI to the AF-free diet did not produce any significant changes compared with the controls. These results suggest that CLI was effective for the protection of AF-toxication in broilers and it could contribute to a solution of the AF problem in poultry production.  相似文献   

Assessment of Thinopyrum ponticum (Podp.) Barkworth & D. R. Dewey accessions using universal rice primers and molecular cytogenetics     

Tiryaki  Iskender  Karaoğlu  Gülhan Baytekin  Yücel  Gülru  Tuna  Metin 《Genetic Resources and Crop Evolution》2021,68(5):1875-1888

Genetic Resources and Crop Evolution - The aim of this study was to make morphological and molecular characterization of tall wheatgrass (Thinopyrum ponticum) accessions naturally found in...  相似文献   

Microencapsulation of Phenolic Extracts from Cocoa Shells to Enrich Chocolate Bars     

Grassia  M.  Messia  M.C.  Marconi  E.  Demirkol  Ȫ. Şakiyan  Erdoğdu  F.  Sarghini  F.  Cinquanta  L.  Corona  O.  Planeta  D. 《Plant foods for human nutrition (Dordrecht, Netherlands)》2021,76(4):449-457

Plant Foods for Human Nutrition - Cocoa bean shells were subjected to green extraction technologies, based on the absence of toxic organic solvents, to recover polyphenols; the extract was then...  相似文献   

Relationships between serum serotonin and serum lipid levels, and aggression in horses     

Meral Y  Cakiroğlu D  Sancak AA  Cýftcý G  Karabacak A 《DTW. Deutsche tier?rztliche Wochenschrift》2007,114(1):30-32

Levels of serum serotonin and serum lipids--triglyceride, total cholesterol, low-density lipoprotein, high-density lipoprotein and very low-density lipoprotein, were determined in normal horses and horses diagnosed with aggression on the basis of a questionnaire survey. Blood serotonin levels in aggressive horses were found to be significantly lower than in non-aggressive horses (P < 0.01), but no association was found with respect to blood lipids.  相似文献   

A study on morphology and morphometric parameters on skull of the Bardhoka autochthonous sheep breed in Kosovo     

Ozan Gündemir  Sokol Duro  Tefik Jashari  Oya Kahvecioğlu  İsmail Demircioğlu  Hajrip Mehmeti 《Anatomia, histologia, embryologia》2020,49(3):365-371

In this study, we aim to investigate the skull of Bardhoka sheep, which is the native breed of Kosovo by utilising normal morphometric methods. Differences between male and female were also statistically analysed. Further, the parameters that can be used in gender discrimination were also analysed. The statistical analysis was based on a sample of 24 adult skulls of Bardhoka breed with 12 female and 12 male skulls. Altogether, 31 different measurements were taken morphologically and 7 different indices were applied. Except for the measurement's values of the orbit, measurement's values of length of the cheek tooth row and the measurement's values of height of the foramen magnum, all the measured values of males were higher than females. Nasal index, cranium index and skull index values were statistically significant between both genders. It is envisaged that the findings of this study will motivate and assist other comparative studies with other autochthonous sheep and goat breeds found in the Dukagjini region or in clinical veterinary practice and even in zooarchaeology.  相似文献