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Search Results: 1 - 10 of 325378 matches for " S. S. Modarres Najafabadi "
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Seasonal Population Changes of Wheat Green Aphid (Schizaphis graminum) and Introduction of its Natural Enemies in Sistan Region
S. S. Modarres Najafabadi,GH. GHolamian
Journal of Science and Technology of Agriculture and Natural Resources , 2007,
Abstract: Seven species of aphids belonging to the family Aphididae in six genera were collected and identified in wheat and barely fields in Sistan region (Miankangi, Shahraki-Narooi, Shibab and Markazi) during1999-2000. Among them, Schizaphis graminum (Wheat green aphid) was the dominant species with an abundance of about 85.4% in the area. The seasonal population changes of Schizaphis graminum were studied simultaneously in the fields of Sistan region (Zahak research station and its surrounding fields). The research was conducted in half a hectar of each farm. Thirty leaves from each field at weekly interval were randomly picked up and the aphids were collected and identified at the species level. The Schizaphis graminum had a peak of activity in the second half of March to April at the temperature and R.H. ranges of between 22-28oC and %45-65R.H. respectively. The control conditions study (Incubator with 25±2oC and %75±5R.H.) indicated that the Schizaphis graminum had a life cycle of 5-7 days and adult female longevity was 20-31 days. Rearing study also revealed that this species had ability to reproduce up to 18-98 nymphs in the laboratory condition (Cultural room with 20-25 oC and 55±5R.H.) and an apterous female gave birth to 22-93 nymphs in her life. Samplings for recognition of predators and parasitoids were also done at 3-day intervals. Natural enemies in the fields during the two years were identified as consisting of six coccinellid (Col:Coccinellidae), ten syrphid (Dip:Syrphidae) and two chrysopid species (Neu: Chrysopidae). Also in Hymenoptera, five parasitoids (Hym:Aphidiidae) were determined.
Population Fluctuations of Cabbage Aphid (Brevicoryne brassicae) and Identification of its Natural Enemies in Sistan Region
S. S. Modarres Najafabadi,H. Akbari Moghaddam,G. Gholamian
Journal of Science and Technology of Agriculture and Natural Resources , 2005,
Abstract: Four different species of aphids belonging to the Aphididae family in four genera were collected and identified in Rape-seed fields in Sistan region during 2000-2001. Among them, Brevicoryne brassicae (Cabbage aphid) was the dominant species with an abundance of about 89% in area. The population fluctuation of Brevicoryne brassicae was studied simultaneously on fields in Sistan region (Zahak research station and her around fields). The research was conducted on a half hectare of each farm. Thirty leaves from each field at week intervals were randomly picked up and the aphids were collected and identified at the species level. The Brevicoryne brassicae had a peak of activity in early mid March to April at temperature and R.H. ranging between 22-28oC and 45-65 R.H., respectively. Controlled conditions indicated that the Brevicoryne brassicae has a life cycle of 6-7 days and adult female longevity is 20-31 days (25±2 oC and 75±5 R.H.). Rearing study also revealed that this species has the ability to reproduce up to 18-98 nymphs under laboratory conditions and an apterous female gives birth to 22-93 nymphs in her life time. Samplings for recognition of predators and parasitoids were also taken at 3-day intervals. Natural enemies in fields during the two years were identified to be 5 coccinellid (Col:Coccinellidae), 4 syrphid(Dip:Syrphidae) and 2 chrysopid species (Neu:Chrysopidae). Also in Hymenoptera, 2 parasitoids (Hym: Aphidiidae & Pteromalidae) were determined.
ENTERIC ADENOVIRUS INFECTION IN INFANTS AND YOUNG CHILDREN WITH ACUTE GASTROENTERITIS IN TEHRAN
S. Modarres,F. Jam-Afzon S. Modarres
Acta Medica Iranica , 2006,
Abstract: Adenoviruses are one of the most important etiological agents of serious gastroenteritis among infants and young children. Fecal specimens from patients with an acute gastroenteritis were evaluated for the presence of adenovirus (Ad40, 41) from April 2002 to February 2004. During the study, 1052 samples were collected from children under the age of 5 years in six educational and therapeutic pediatric centers. The specimens were tested for adenovirus (Ad40, 41) by EIA technique in the Virology Department of Pasteur Institute of Iran. Adenoviruses (Ad40, 41) were detected from 27(2.6%) samples, but were not detected in 150 samples of healthy control group. In this study the highest rate of adenovirus was found in children aged 6 to 12 months (40.7%), but the male to female ratio inpatients was approximately equal. Adenovirus (Ad40, 41) infections peaked in the winter as 48.1% was detected from December to March. There were a statistically significant difference between age and infection (P < 0.001), also between season with adenovirus (Ad40, 41) infection (P = 0.005). Breast-feeding had a protective action against adenovirus (Ad40, 41) infection. This study revealed that enteric adenovirus (Ad40, 41) is an etiological agent of acute gastroenteritis among children in Tehran.
Order almost DUNFORD-PETTIS Operators on Banach lattices
H. Ardakani,S. M. S. Modarres Mosadegh
Mathematics , 2015,
Abstract: By introducing the concepts of order almost Dunford-Pettis and almost weakly limited operators in Banach lattices, we give some properties of them related to some well known classes of operators, such as, order weakly compact, order Dunford-Pettis, weak and almost Dunford-Pettis and weakly limited operators. Then, we characterize Banach lattices E and F on which each operator from E into F that is order almost Dunford-Pettis and weak almost Dunford-Pettis is an almost weakly limited operator.
Angular Correlations in Associated Production of Single Top and Higgs with and without anomalous $Wtb$ Couplings
Taghavi, S. F.;Najafabadi, M. Mohammadi
High Energy Physics - Phenomenology , 2013,
Abstract: We study the angular correlation and the amount of top quark polarization in the production of a higgs boson in association with a single top quark in the $t-$channel at the LHC. We also study the effect of anomalous $Wtb$ couplings on the angular correlation and on the production cross section of the process. The cross section and angular correlation is almost insensitive to the variation of the Higgs boson mass within 3 GeV. The robustness of the angular correlation against the center-of-mass energy of the proton-proton collision, the variation of parton distribution functions, and the change of factorization scale is investigated. The sensitivity of this process to the anomalous couplings is examined.
Quantifying Landscape Pattern Using RS & GIS Techniques for Mooteh Wildlife Refuge
A Soffianian,S Maleki najafabadi,V Rahdari
Journal of Science and Technology of Agriculture and Natural Resources , 2009,
Abstract: Landscape ecology as a modern interdisciplinary science offers new concepts, theories, and methods for land evaluation and management. One main part of landscape ecology is describing patterns in the landscape and interpreting the ecological effects of these patterns on flora, fauna, flow of energy and materials. Landscape studies require methods to identify and quantify spatial patterns of landscape. Quantification of spatial patterns is essential to understand landscape functions and processes. Landscape indices as diversity and naturalness can provide quantitative information about landscape pattern. Remote sensing and GIS techniques have high ability for landscape researchers to specify, map and analyze landscape patterns. The objectives of the research include mapping and quantifing diversity and naturalness indices for Mooteh wildlife refuge by land use/land cover map derived from remote sensing images. Finally, diversity and naturalness were classified in 4 and 6 classes, respectively. Results showed that the intermediate and high diversity classes (class 1 & 2) have occupied the largest area in the study area. Among naturalness classes, class 1 which represents the high level of naturalness has taken the largest area in Mooteh W.R.
The ground state energy of 3He droplet in the LOCV framework
M Modarres,S Motahari,A Rajabi
Iranian Journal of Physics Research , 2012,
Abstract: The (extended) lowest order constrained variational ((E) LOCV) method was used to calculate the ground state energy of liquid helium 3 (3He) droplets at zero temperature. Different types of density distribution profiles, such as the Gaussian, the Quasi-Gaussian and the Woods-Saxon were used. It was shown that at least, on average, near 20 3He atoms are needed to get the bound state for 3He liquid droplet. Depending on the choice of the density profiles and the atomic radius of 3He, the above estimate can increase to 300. Our calculated ground state energy and the number of atoms in liquid 3He droplet were compared with those of Variational Monte Carlo (VMC) method, Diffusion Monte Carlo (DMC) method and Density Functional Theory (DFT), for which a reasonable agreement was found.
Mechanical Properties of Whole Apple, It’s Skin and Flesh
S. Shafiee,A. Modarres Motlagh,A. Rahmani Didar,S. Minaee
Research Journal of Biological Sciences , 2012,
Abstract: The usual puncture test was applied to determine some mechanical properties of Golden Delicious and Red Delicious apple and effect of skin on this parameters. The difference between overall puncture load displacement (whole fruit) and that measured without skin provide a satisfactorily precise result related to mechanical behavior of skin itself. This procedure is applied to evaluate the effect of skin on mechanical behavior of apple. Skin has an effective role in most puncture properties of the apple. Skin cause to increase in maximum force of compression, firmness, toughness, lam`s coefficient and elastic modulus of the apple. The kind of varieties has a significant effect on force, firmness, lam coefficient ( ) and elastic modulus of apple. For two varieties of apple skin has a high percent of toghness and rupture force but the contribution of skin in Golden Delicious apple is higher than Red Delicious apple. The contribution of skin in deformation for 2 varieties is few.
Investigation the Effect of Skin on Mechanical Behavior of Apple
S. Shafiee,A. Modarres Motlagh,A. Rahmani Didar,S. Minaee
Journal of Food Technology , 2013,
Abstract: The usual puncture test was applied to determine some mechanical properties of Golden Delicious and Red Delicious apple and effect of skin on this parameters. The difference between overall puncture load displacement (whole fruit) and that measured without skin provide a satisfactorily precise result related to mechanical behavior of skin itself. This procedure is applied to evaluate the effect of skin on mechanical behavior of apple. Skin has an effective role in most puncture properties of the apple. Skin cause to increase in maximum force of compression, firmness, toughness, lam`s coefficient and elastic modulus of the apple. The kind of varieties has a significant effect on force, firmness, lam coefficient ( ) and elastic modulus of apple. For two varieties of apple skin has a high percent of toghness and rupture force but the contribution of skin in Golden Delicious apple is higher than Red Delicious apple. The contribution of skin in deformation for 2 varieties is few.
Mechanical Properties of Whole Apple, Ita€ s Skin and Flesh
S. Shafiee,A. Modarres Motlagh,A. Rahmani Didar,S. Minaee
Research Journal of Biological Sciences , 2008,
Abstract: The usual puncture test was applied to determine some mechanical properties of Golden Delicious and Red Delicious apple and effect of skin on this parameters. The difference between overall puncture load displacement (whole fruit) and that measured without skin provide a satisfactorily precise result related to mechanical behavior of skin itself. This procedure is applied to evaluate the effect of skin on mechanical behavior of apple. Skin has an effective role in most puncture properties of the apple. Skin cause to increase in maximum force of compression, firmness, toughness, lam`s coefficient and elastic modulus of the apple. The kind of varieties has a significant effect on force, firmness, lam coefficient (μ) and elastic modulus of apple. For two varieties of apple skin has a high percent of toghness and rupture force but the contribution of skin in Golden Delicious apple is higher than Red Delicious apple. The contribution of skin in deformation for 2 varieties is few.
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