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Zandi-Sohani N.,University of Agriculture and Natural Resources Ramin
Indian Journal of Agricultural Sciences | Year: 2011

The toxicity of essential oil vapours distilled from thyme (Zataria multiflora Boiss), rosemary (Rosmarinus officinalis L.), Savory (Satureja hortensis L.), Penny royal (Mentha pulegium L.) and spearmint (Mentha viridis L.) were tested against adults of cotton whitefly (Bemisia tabaci Gennadius). Insects were exposed at time 3, 6, 9, 12 and 24 hr and the amounts of the essential oils were 2,4, 6 and 8 μl in each desiccator with 41 capacity, corresponding to 0.5, 1, 1.5 and 2 μl/1 air. The essential oil vapours of all five species caused the highest mortality in 2 μl/l air doses and 24hr of exposure time in this species. In general, higher mortality was observed as the doses of essential oils and exposure period increased. The results showed that the essential oil of five aromatic plants have the potential to be used for management of B. tabaci in greenhouse conditions. M. pulegium and M. viridis essential oils caused the highest mortality of B. tabaci adults (78.75 and 78.19%), respectively. The mean mortality caused by essential oils of Z multiflora, R. officinalis and S. hortensis were 69.02, 54.3 and 53.47% respectively. Source


Azizi-Shotorkhoft A.,University of Agriculture and Natural Resources Ramin | Rezaei J.,Tarbiat Modares University | Fazaeli H.,Animal Science Research Institute
Animal Feed Science and Technology | Year: 2013

A 28-d experiment was performed to evaluate the influence of replacing dietary corn/barley with molasses at levels of 0 (M0), 50 (M50) and 100 (M100) g/kg dietary dry matter (DM), as energy sources, in the diets containing heat-processed broiler litter (HBL) (240. g/kg DM) in male Moghani sheep. Digestibility, microbial protein supply (MPS), ruminal parameters and blood metabolites were measured. The digestibility of DM and crude protein (CP) in experimental sheep linearly increased (L, P=0.01) as level of molasses enhanced in the diets. Addition of molasses to diet linearly increased MPS (L, P=0.01) compared to sheep fed the control diet. Ruminal pH and ammonia concentrations linearly declined (L, P<0.05) as level of molasses increased in the diet. There was no difference (P>0.05) in ruminal volatile fatty acid concentrations, except a linear increase in the molar proportion of butyrate (L, P=0.02) among the molasses supplemented groups. Blood urea-N linearly decreased (L, P=0.02) in sheep fed molasses compared to the control group. It can be concluded that replacing corn/barley with molasses in sheep diet improved the utilization of the diet containing HBL. © 2012 Elsevier B.V. Source


Osdaghi E.,University of Agriculture and Natural Resources Ramin | Lak M.R.,Agricultural and Natural Resources Research Center of Iran
Journal of Phytopathology | Year: 2015

A new orange variant of Curtobacterium flaccumfaciens pv. flaccumfaciens was isolated from seeds of common bean cv. Daneshkadeh and Dehghan stored in the seed banks in Khomein Bean Research Station, and field plants (cv. Local Khomein) in Arak, Iran. The pathogenicity of the isolates was confirmed on 5- to 7-day-old seedlings of cv. Daneshkadeh. Marginal necrosis and interveinal chlorosis on first trifoliate leaves were observed 10-15 days after inoculation. Amplification of 306 bp fragment of orange-pigmented strains using CffFOR2- and CffREV4-specific prime pair characterized them as C. flaccumfaciens pv. flaccumfaciens. Although the yellow-pigmented variant of the causal agent was previously reported on cowpea, this is the first report of orange variant of C. flaccumfaciens pv. flaccumfaciens causing bacterial wilt on common bean in Iran. © 2015 Blackwell Verlag GmbH. Source


Tahmouzi S.,University of Agriculture and Natural Resources Ramin
Carbohydrate Polymers | Year: 2014

Ultrasonic assisted-extraction technique was applied to extract the polysaccharide from Zagros oak (Quercus brantii Lindl). The effects of four independent factors (ultrasonic power (X1: 150-300 W), extraction temperature (X2: 50-90 C), extraction time (X3: 30-90 min), and the ratio of water to raw material (X4: 15-45)) on the extraction yield of polysaccharide from the leaves of Q. brantii Lindl (QBLP) were optimized using response surface methodology. The experimental data obtained were fitted to a second-order polynomial equation. The optimal extraction conditions for QBLP were determined as follows: X1: 205.8 W, X2: 81.9 C, X3: 55.6 min and X4: 23.4. Under these optimal conditions, the experimental yield was 19.42 ± 0.53%, which was well matched with the value predicted by the model 19.61%. The results indicated that polysaccharide has strong scavenging activities in vitro on DPPH and hydroxyl radicals. In addition, the QBLP showed good antimicrobial activity at 1.5-2.5 mg/mL. © 2014 Elsevier Ltd. All rights reserved. Source


Tabatabaei S.,University of Agriculture and Natural Resources Ramin
Comparative Clinical Pathology | Year: 2012

The purpose of this study was to determine the values of some metabolites, ions, and enzymes in maternal blood serum and fetal fluids in relation to pregnancy stage in singleton pregnant goats. Gravid uteri of goats were collected from local abattoirs. The allantoic and amniotic fluids as well as maternal blood samples were collected. Fetal age was determined according to crown-rump length by applying the age estimation formula that previously was presented for goat. The pregnancies were divided into five stages as: stage I (0-30 days), stage II (31-60 days), stage III (61-90 days), stage IV (91-120 days), and stage V (121 days to term). With the progress of pregnancy, the biochemical levels of fetal fluids and maternal serum changed as follows: there was a rise of total protein, urea, and creatinine concentrations in fetal fluids and serum; the level of glucose in serum, potassium, and ALK in fetal fluids and calcium and phosphorus in allantoic fluid increased; triglyceride and sodium contents of fetal fluids and serum decreased; glucose in fetal fluids, AST and LDH in serum and allantoic fluid, potassium and ALT in serum, and calcium and phosphorus in amniotic fluid and serum dropped; the values of AST, ALT, and ALK in amniotic fluid remained unchanged; and the levels of cholesterol and LDH in amniotic and allantoic fluids were constant in the whole gestation periods. The serum cholesterol value showed a significant decrease from stages 1 to 2 of pregnancy. But, it was not significant from stages 2 to 5 of gestation. © 2011 Springer-Verlag London Limited. Source

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