Evaluation of seedling and adult plant resistance to leaf rust in European wheat cultivars     

Amin K. Pathan  Robert F. Park 《Euphytica》2006,149(3):327-342

Summary A set of 105 European wheat cultivars, comprising 68 cultivars with known seedling resistance genes and 37 cultivars that had not been tested previously, was tested for resistance to selected Australian pathotypes of P. triticina in seedling greenhouse tests and adult plant field tests. Only 4% of the cultivars were susceptible at all growth stages. Twelve cultivars lacked detectable seedling resistance to leaf rust, and among the remaining cultivars, 10 designated genes were present either singly or in combination. Lr13 was the most frequently detected gene, present in 67 cultivars, followed by the rye-derived gene Lr26, present in 19 cultivars. Other genes present were Lr1, Lr3a, Lr3ka, Lr10, Lr14a, Lr17b, Lr20 and Lr37. There was evidence for unidentified seedling resistance in addition to known resistance genes in 11 cultivars. Field tests with known pathotypes of P. triticina demonstrated that 57% of the cultivars carried adult plant resistance (APR) to P. triticina. The genetic identity of the APR is largely unknown. Genetic studies on selected cultivars with unidentified seedling resistances as well as all of those identified to carry APR are required to determine the number and inheritance of the genes involved, to determine their relationships with previously designated rust resistance genes, and to assess their potential value in breeding for resistance to leaf rust.  相似文献   

Parasitic fauna of farmed freshwater ornamental fish in the northwest of Iran     

Rahmati-Holasoo  Hooman  Marandi  Amin  Ebrahimzadeh Mousavi  Hosseinali  Taheri Mirghaed  Ali 《Aquaculture International》2022,30(2):633-652

Ornamental fish farming is globally a key sector of aquaculture. The purpose of this study was to report on the parasitic fauna of ornamental fish from seven farms in the East Azerbaijan province in northwestern Iran. Between November 2020 and February 2021, a total of 600 freshwater ornamental fish of six species, including goldfish (Carassius auratus), angel (Pterophyllum scalare), guppy (Poecilia reticulata), dwarf gourami (Colisa lalia), swordtail (Xiphophorus helleri), and cichlid (Cichlasoma sp.) were collected for parasitological analysis. Six ciliate protozoan species (Trichodina mutabilis, Trichodina nobilis, Trichodina spp., Heteropolaria lwoffi, Ichthyophthrius multifiliis, and Chilodonella spp.), three species of monogenean trematodes (Dactylogyrus dulkeiti, Dactylogyrus spp. and Gyrodactylus spp.), two species of crustacean arthropods (Lernaea cyprinacea and Argulus japonicus), and a nematode (Capillaria spp.) were identified among the examined fish. Parasites were detected in the fish from 5 of 7 farms, with an overall parasitic prevalence in 26.33% (158/600) of the fish. Fish infection rates with protozoans, monogenean trematodes, crustacean arthropods, and nematodes were 16.83, 13.17, 4, and 0.33% respectively. The highest prevalence was found in X. helleri infected with Gyrodactylus spp. and P. scalare infested with Trichodina spp. Moreover, 9/100 and 10/100 of goldfish were infected with A. japonicus and L. cyprinacea, compared to 2/500 and 3/500, respectively, for all other species in combination, which is a statistically significant result (p?<?0.01). Assessment of farmed fish parasitic fauna is important to inhibit the spread of infections, ensure fish production and improve fish health.

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Synthesis of dimethyl derivatives of imidazolinone herbicides: their use in efficient gas chromatographic methods for the determination of these herbicides     

Anisuzzaman AK  Amin M  Ogg N  Hoq F  Kanithi MR  Jenkins RE 《Journal of agricultural and food chemistry》2000,48(12):5893-5902

The dimethyl derivatives of imazaquin, imazapyr, imazmethapyr, imazethapyr, 2-[4,5 dihydro-1, 4-dimethyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-methoxymethyl- 3-pyridine carboxylic acid, 2-[4,5-dihydro-1,4 -dimethyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-4-methyl benzoic acid, and 2-[4,5-dihydro-1,4-dimethyl-4-(1-methyl ethyl)-5-oxo-1H-imidazol-2-yl]-5-methyl benzoic acid were prepared and fully characterized. The availability of these derivatives has led to the development of efficient and multiresidue gas chromatographic methods for trace level analysis of imidazolinone herbicides in matrixes such as water, soybean, and soil.  相似文献   

Effects of transplanted mesenchymal stem cells isolated from Wharton’s jelly of caprine umbilical cord on cutaneous wound healing; histopathological evaluation     

Azari O  Babaei H  Derakhshanfar A  Nematollahi-Mahani SN  Poursahebi R  Moshrefi M 《Veterinary research communications》2011,35(4):211-222

The aim of this study was to investigate the effects of transplanted Wharton’s jelly mesenchymal stem cells (WJMSCs) of caprine umbilical cord on cutaneous wound healing process in goat. After collection of caprine pregnant uterus of mixed breed goats from abattoir, the Wharton’s jelly (WJ) of umbilical cord was harvested. The tissues were minced in ventilated flasks and explant culture method was used for separating mesenchymal stem cells (MSCs). The isolated cells were immunostained for Actin protein, histochemically assayed for the presence of alkaline phosphatase activity, and analyzed for detection of matrix receptors (CD44) and hematopoetic lineage markers (CD34), using flow cytometery. After The isolated cells, 3 × 10⁶ MSCs were stained with BrdU and prepared for transplantation to each wound. Four 3-cm linear full thickness skin incisions were made on both sides of thoracic vertebrate of four Raeini goats (two wounds on each side). The left wounds were implanted with MSCs in 0.6 ml of Phosphate buffer saline (PBS), and the right wounds considered as control group that received 0.6 ml of PBS. The samples were taken from the wounds 7 and 12 days after the wounding, and healing process was compared histologically between the two groups. Anti-BrdU staining showed that the transplanted cells were still alive in the wound bed during the study. The histopathological study revealed that re-epithelialization was complete at days 7 in treated wounds with WJMSCs, whereas in control wound the wounds still showed incomplete epithelialization 12 days after wounding. Also, microscopic evaluation showed less inflammation, thinner granulation tissue formation with minimum scar in the treated wounds in comparison with control wounds. In conclusion, this study demonstrates the beneficial effect of caprine WJMSCs in cutaneous wound healing in goat.  相似文献   

The Effects of Crude Placental Extract and Erythritol on Growth of Chlamydia Psittaci (Ovis) in McCoy Cells     

Amin  J.D.  Wilsmore  A.J. 《Veterinary research communications》1997,21(6):431-435

Amin, J.D. and Wilsmore, A.J., 1997. The effects of crude placental extract and erythritol on growth of Chlamydia psittaci (ovis) in McCoy cells. Veterinary Research Communications, 21 (6), 431-435  相似文献   

The antinociceptive activity and respiratory effects of fentanyl in sheep     

A. E. Waterman  A. Livingston  A. Amin 《Veterinary anaesthesia and analgesia》1990,17(1):20-23

The analgesic activity of fentanyl was measured in sheep using both thermal and mechanical test systems. Fentanyl at a dose rate of 5 μg/kg given intravenously (iv) produced significant analgesia to thermal pain for some 30 mins but no detectable mechanical antinociceptive activity. However, at a dose rate of 10 μg/kg the drug produced both thermal (for 60 mins) and mechanical (40 mins) antinociceptive effects. In one sheep a dose of 20 μg/kg produced thermal analgesia for 110 mins and mechanical antinociception for 60 mins. Following iv injection at 10 μg/kg in five of the sheep, there was a brief period of respiratory depression evidenced by a significant fall in PaCO₂ of the order of 25 per cent and an increase in PCO₂ levels, but these changes were short lived and levels were back to normal at 15 mins after injection.  相似文献   

Molecular characterization of the circulating Bacillus anthracis in Jordan     

Amin Abdelfattah Aqel  Ekhlas Hailat  Luigina Serrecchia  Suad Aqel  Emanuele Campese  Nadia Vicari  Antonio Fasanella 《Tropical animal health and production》2015,47(8):1621-1624

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Economic Feasibility of Saving Water Through Controlling Outflow of Ghanats     

S. Amin  J.M. Sadeghi  M.A. Salimi Manshadi 《Irrigation and Drainage Systems》2004,18(2):145-154

The purpose of this study was toinvestigate the economic feasibility ofimplementing a scheme to control theoutflow of ghanats in Iran. The schemesaves an average of 34,000 m3 of waterper ghanat each year during the months whenthere is no agricultural activity. Thewater saved will later be used forirrigation purposes. The cost of theimplementation of the scheme is compared tothose of two other alternatives: theconstruction of new ghanats and the diggingof new wells to provide the same amount ofwater saved by the scheme. The resultsindicate that obtaining the amount of watersaved by executing the scheme costs 877 and26 times less than those required forproducing a new ghanat or a new well,respectively. On the basis of theseresults, application of the scheme to 25%of the existing ghanats in Iran that aretechnically suitable is stronglyrecommended.  相似文献   

Optimization of elecrospinning process of zein using central composite design     

Mohammad Amin Miri  Jebrail Movaffagh  Mohammad B. Habibi Najafi  Masoud Najaf Najafi  Behrouz Ghorani  Arash Koocheki 《Fibers and Polymers》2016,17(5):769-777

Biodegradable edible sub-micron electrospun zein fibers were prepared using acetic acid as solvent. The solution concentration at three levels: 22, 26 and 30 w/v %, the electrospinning voltage at three levels: 10, 20 and 30 kV, the solution flow rate at three levels: 4, 8 and 12 ml/h and the distance between needle tip and collector at three levels: 10, 15 and 20 cm were studied. Central composite design (CCD) was utilized to modeling the effect of electrospinning parameters of zein solution on average fiber diameters and the data were analyzed using response surface methodology (RSM). Coefficient of determination, R², of fitted regression model was higher than 0.9 for response. The analysis of variance table showed that the lack of fit was not significant for response surface model at 95 %. Therefore, the model for response variable was highly adequate. Results also indicated that the solution concentration had significant influence (P<0.0001) on morphology and diameter of fibers. By increasing the solution concentration, uniform and bead-free fibers were obtained. As the solution concentration was increased, the average fiber diameters were also increased. Furthermore, the electrospinning voltage had significant effect (P<0.0001) on average fiber diameters. By increasing the electrospinning voltage, the average fiber diameters increased. The solution flow rate and the distance between needle tip and collector had no significant influence on the average fiber diameters. According to model optimization, the minimum average fiber diameter of electrospun zein fiber is given by following conditions: 24 w/v % zein concentration, 10 kV of the applied voltage, 10 cm of needle tip to collector distance, and 4 ml/h of solution flow rate.  相似文献   

Synthesis of (-)-[4-3H]epigallocatechin gallate and its metabolic fate in rats after intravenous administration   总被引：1，自引：0，他引：1  

Kohri T  Nanjo F  Suzuki M  Seto R  Matsumoto N  Yamakawa M  Hojo H  Hara Y  Desai D  Amin S  Conaway CC  Chung FL 《Journal of agricultural and food chemistry》2001,49(2):1042-1048

Because a great deal of attention has been focused on the metabolism of (-)-epigallocatechin gallate (EGCg), quantitative analysis of this compound is required. For this purpose we developed a method of chemical synthesis of [4-(3)H]EGCg. Synthesized [4-(3)H]EGCg showed 99.5% radiochemical purity and a specific activity of 13 Ci/mmol. To clarify the excretion route of EGCg, the radioactivity levels of bile and urine were quantified after intravenous administration of [4-(3)H]EGCg to bile-duct-cannulated rats. Results showed that the radioactivity of the bile sample excreted within 48 h accounted for 77.0% of the dose, whereas only 2.0% of the dose was recovered in the urine. The excretion ratio of bile to urine was calculated to be about 97:3. These results clearly showed that bile was the major excretion route of EGCg. Time-course analysis of the radioactivity in blood was also performed to estimate the pharmacokinetic parameters following intravenous administration of [4-(3)H]EGCg. In addition, EGCg metabolites excreted in the bile within 4 h after the intravenous dose of [4-(3)H]EGCg were analyzed by HPLC. The results showed that 4',4"-di-O-methyl-EGCg was present in the conjugated form and made up about 14.7% of the administered radioactivity.  相似文献