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Search Results: 1 - 10 of 112119 matches for " O Karami "
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Shoot organogenesis in oleaster (Elaeagnus angustifolia L.)
O Karami, K Piri
African Journal of Biotechnology , 2009,
Abstract: Efficient plant regeneration through organogenesis was achieved from callus cultures derived from leaf explants of Elaeagnus angustifolia. Calli were obtained on MS medai containing 3% sucrose and different concentrations of TDZ (0.5, 1, 2, 3, 4 and 6 mg/l). Maximum percentage response for callus formation was 85% on MS medium supplemented with 2 mg/l of TDZ. Shoot organogenesis was achieved after transfer of calli to MS media with 3% sucrose and different concentrations of BA (0.5, 1, 2, 3, 4 and 6 mg/l) and kinetin (0.5, 1, 2, 3, 4 and 6 mg/l). Maximum organogenesis was obtained with 2 mg/l of BA. Rooting of the shoots was achieved on MS supplemented with 0.2 mg/l of IBA. Regenerated plantlets were acclimatized and successfully transplanted to soil.
Direct Somatic Embryogenesis and Plant Regeneration in Carnation (Dianthus caryophyllus L.)
O. Karami,A. Deljou,A. Mahmoudi Pour
Journal of Science and Technology of Agriculture and Natural Resources , 2008,
Abstract: In vitro regeneration of two cultivars of carnation, namely, ‘Nelson’ and ‘Impulse’ was studied through direct somatic embryogenesis. Somatic embryos were formed directly on petal explants cultured on Murashige and Skoog (MS) medium containing different concentrations (0.2, 0.5, 1, 2, 4, 6 mg 1-1) of picloram. Maximum embryogenesis was obtained with 1 and 2 mg/l picloram. Globular shaped embryos were developed into cotyledonary-shaped embryos when they were transferred to the growth regulator-free media containing different concentrations (2, 4, 6, 8, and 10 %) of sucrose. Increasing sucrose concentrations in the culture media enhanced somatic embryos development. Cotyledonary somatic embryos developed plantlets when they were transferred to the half-strength MS culture medium containing 3% sucrose. Plantlets also continued to grow under greenhouse conditions.
The Effect of Television Decors on the Change of Reverberation Time of the Studio  [PDF]
Mohsen Karami, Masoumeh Shafieian
Open Journal of Acoustics (OJA) , 2013, DOI: 10.4236/oja.2013.32005
Abstract: Reverberation time within studios decor is changed because of addition of its surface to the overall surfaces of the studio and also the additional absorption of its materials. It seems reverberation time changes due to studios decor is little because surface of the decor is small in comparison with the overall surfaces of the studio and surface has an important role in room constant and therefore in reverberation time. But these changes do not only depend on added surfaces and their absorption. Reverberation time is also dependent on shape of the decor and sometimes. It can decrease the effects of added surfaces which are used to increase the reverberation time. In this paper, a standard television studio is designed and implemented by using ODEON and 12 different decor which their dimensions and materials are similar to the actual ones, are applied inside the studio. Then studios decor effects on reverberation time of the studio are computed, compared and analyzed.

The Phenological Stages of Apple Tree in the North Eastern of Iran  [PDF]
Mokhtar Karami, Mehdi Asadi
Computational Water, Energy, and Environmental Engineering (CWEEE) , 2017, DOI: 10.4236/cweee.2017.63018
Abstract:
The main objective of this study was to evaluate the process of parameters such as mean temperature; total precipitation on phenology and phenological stages of apple golden type in Razavi Khorasan. For this reason, long-term data of absolute minimum daily temperature, precipitation, humidity, as well as Digital Elevation Model (DEM) was used. After collecting data on phenology and Growing Degree Days (GDD) for golden apple, to pass each phenological stage at different growth stages, the start and end dates, phenological stages of the locations were identified. Then, regression equations with variable longitude, latitude and altitude on SPSS software at level of 50% and 95%, respectively were used, and finally phenological stages and spatial distribution maps of temperature and precipitation variables based on these equations were drawn in ARC GIS software. The analysis of the phenological stages showed that Torbate Heydarieh station has a decreasing trend which is significant at 1% in all stages of phenology and Ghoochan station does not show any significant increase or decrease trend at all stages of phenology.
Diagnosis: Post Colonoscopic Bowel Perforation in Underlying Secondary Amyloidosis
L. Aghaghazvini,P. Karami,O. Yeganeh,Sh. Aghaghazvini
Iranian Journal of Radiology , 2011,
Abstract:
Effect of Mannitol on Growth of Embryogenic Callus-Derived Somatic Embryos of Carnation (Dianthus Caryophyllus L.)
A. Deljou,O. Karami,M. Esna-Ashari
Journal of Science and Technology of Agriculture and Natural Resources , 2007,
Abstract: In vitro regeneration of four cultivars of carnation namely ‘Nelson’, ‘Impulse’, ‘Sagres’ and ‘Spitit’ through somatic embryogenesis was studied. MS culture medium was supplemented with 30 gl-1 sucrose, 2 mgl-1 2,4-D and 0.2 mgl-1 BA and used for embryogenic callus formation. Somatic embryos were formed when embryogenic callus was transferred to MS medium without growth regulators containing 30 g/l-1 sucrose alone or supplemented with different concentrations of mannitol (15, 30, 60, 90, 120 and 150 gl-1). No somatic embryo was formed on culture media containing mannitol without sucrose. Number of somatic embryos produced from embryogenic calli significantly increased by adding mannitol to the culture media. Normal embryos formed on culture media containing high concentrations of mannitol (60, 90, 120 and 150 gl-1) developed normally. About 95% of somatic embryos transferred to the1/2 MS culture medium containing 30 gl-1 sucrose, germinated into plantlets. Plantlets also continued their growth under greenhouse conditions.
The relative impact of persons, items, subtests, and academic background on performance on a language proficiency test
Hossein Karami
Psychological Test and Assessment Modeling , 2012,
Abstract: This study exploited generalizability theory to explore the impact of persons, items, subtests, and academic background on the dependability of the scores from a high-stakes language proficiency test, the University of Tehran English Proficiency Test (UTEPT). To this end and following Brown (1999), three questions were posed: 1. What are the distributional characteristics and CTT reliability of UTEPT test scores? 2. What are the relative contributions of persons, items, and subtests to the dependability of scores for each group and for all the groups combined? 3. What are the relative contributions of persons, items, subtests, academic background as well as their various interactions to the dependability of the scores when all groups are combined? To investigate the issues, 5795 examinees from four different academic backgrounds were selected from among all the participants who had taken the test in 2004. The results of the study indicated that the relative contributions of the facets were not stable across all groups, though highly similar. In addition, with academic background added as a facet, there was no significant interaction between items and fields, and the dependability of the scores did not decrease either. This result shows that background knowledge does not lead to bias in the UTEPT. This use of G-theory could be extended profitably to other measuring situations.
Comment on "Interacting holographic dark energy model and generalized second law of thermodynamics in a non-flat universe", by M.R. Setare (JCAP 01, 023, 2007)
K. Karami
Physics , 2009, DOI: 10.1088/1475-7516/2010/01/015
Abstract: Author of Ref. [1], M.R. Setare (JCAP 01, 023, 2007, arXiv:hep-th/0701242), by redefining the event horizon measured from the sphere of the horizon as the system's IR cut-off for an interacting holographic dark energy model in a non-flat universe, showed that the generalized second law of thermodynamics is satisfied for the special range of the deceleration parameter. His paper includes an erroneous calculation of the entropy of the cold dark matter. Also there are some missing terms and some misprints in the equations of his paper. Here we present that his conclusion is not true and the generalized second law is violated for the present time independently of the deceleration parameter.
Comment on "A holographic model of dark energy and the thermodynamics of a non-flat accelerated expanding universe", by M.R. Setare and S. Shafei (JCAP 09 (2006) 011, arXiv:gr-qc/0606103)
K. Karami
Physics , 2010,
Abstract: Authors of ref. [1], M.R. Setare and S. Shafei (JCAP 09 (2006) 011), studied the thermodynamics of a holographic dark energy model in a non-flat universe enclosed by the apparent horizon $R_A$ and the event horizon measured from the sphere of the horizon named $L$. In section 3 in ref. [1], Authors showed that for $R_A$ the generalized second law of thermodynamics is respected, while for $L$ it is satisfied for the special range of the deceleration parameter. Here we present that their calculations for $R_A$ should be revised. Also we show that their conclusion for $L$ is not true and the generalized second law is hold for the present time independently of the deceleration parameter. Also if we take into account the contribution of dark matter in the generalized second law which is absent in ref. [1], then the generalized second law for $L$ is violated for the present time.
Zeroes of random Reinhardt polynomials
Arash Karami
Mathematics , 2012,
Abstract: For a Reinhardt domain $\Omega$ with the smooth boundary in $\mathbb{C}^{m+1}$ and a positive smooth measure $\mu$ on the boundary of $\Omega$, we consider the ensemble $P_{N}$ of polynomials of degree $N$ with the Gaussian probability measure $\gamma_{N}$ which is induced by $L^{2}(\partial\Omega,d\mu)$. Our aim is to compute scaling limit distribution function and scaling limit pair correlation function between zeros when $z\in\partial\Omega$. First of all we apply stationary phase method to the Boutet de Monvel-Sj\"{o}strand theorem to get the asymptotic for the partial szeg\"{o} kernel, $S_{N}(z,z)$, and then we compute the scaling limit partial szeg\"{o} kernel in any direction in $\mathbb{C}^{m+1}$, then by using well-known Kac-Rice formula we compute scaling limit distribution function and scaling limit pair correlation function between zeros.
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