plant tissue culture techniques are used as basic requirement of common plant transformation systems. in most cases of plant transformation, a reproducible regeneration protocol is the limiting step due to long time lasting, specialized facilities and well experienced persons. furthermore, tissue culture procedures induce somaclonal variation among regenerated transgenic plants. therefore, rece...

We attempt to address the old problem of plane shear flows: origin turbulence and hence transport angular momentum in accretion flows as well laboratory flows, such Couette flow. undertake by introducing an extra force Orr-Sommerfeld Squire equations along with Coriolis mimicking local region disk. For flow, term drops. Subsequently we solve WKB approximation method. investigate dispersion rela...

A technique for obtaining shift, rotation and scale invariant signatures for two dimensional contours in images is proposed and demonstrated. The technique is based upon a measure of the degree to which the local tangent estimate at each point in the contour is consistent with having been generated by a shift, rotation or scale invariant function. An invariance factor is calculated at each poin...

Regeneration of explants plays a significant role in plant transformation. Explant type, hormonal concentration, and pre-culturing period are important in transformation efficiency. To get an efficient transformation of canola and optimize regeneration conditions, different explants along with different culture media were studied. Four canola varieties were used to evaluate regeneration ability...

Background: Oat (Avena sativa) with high nutritive value and fiber content is used as the main food grain in many countries for human diet as well as animal feed. Recently, it became difficult to transfer new genes through the conventional breeding due to the lack of desirable traits. Objectives: The current study aimed at achieving a st...

background: hemorrhagic transformation (ht) of ischemic stroke (is) is a detrimental complication. this study investigated the association between serum ferritin level and ht in patients with massive is of middle cerebral artery.   methods: thirty patients with massive is of middle cerebral artery were enrolled in this prospective cohort study. they were divided into two groups based on the ser...

Background: A highly efficient genetic transformation system is essential for a successful genetic manipulation of the African violet (Saintpaulia ionantha Wendl.). Objectives: Developing a particle bombardment-based genetic transformation system for the African violet. Materials and Methods: A local cultivar of the African violet from Guilan province was used for transformation experiments. Th...

let $g$ be a finite simple graph whose vertices and edges are weighted by two functions. in this paper we shall define and calculate entropy of a dynamical system on weights of the graph $g$, by using the weights of vertices and edges of $g$. we examine the conditions under which entropy of the dynamical system is zero, possitive or $+infty$. at the end it is shown that, for $rin [0,+infty]$, t...

myths show the layers of human being's collective unconsciousness and include a  nations' symbolic and mysterious conceptions. banugoshasbnameh is a mythic verse book including mythic functions. in banugoshasbnameh, banugoshasb is a warring and heroic archetype. her functions remind the glory of   women's role in agricultural era, the era which is famed for its matriarchy and in ...

pod borer is one of the main factors for yield decrease of chickpea. therefore, breeding of chickpea for resistance to this pest is important. modified cry1ac gene of bacillus thuringiensis in pcry1ac-nptii plasmid containing twin t-dna for cry1ac and nptii genes have been used for transformation of chickpea. at last 38 plants had nptii gene that 36 plants of them had cry1ac gene and two plants...