−Critical condition is derived for parameter−dependent quadratic Lyapunov function for a polytope of matrices. Condition gives some critical points for the plant, such that it becomes impossible to get parameters of Lyapunov function. In this paper first design is proposed of the memory less feedback controller for uncertain dynamic system with time varying delay. It is assumed that uncertainti...

Preconditioning of plant material prior to cryopreservation is beneficial for increasing the survival of plant tissues. Pretreatment of plant cells and tissues can be divided into three categories. Cultural pretreatments may involve growth medium, cold acclimation or consideration of the plant part used. Chemical treatments may be osmotic or penetrating cryoprotectants. Desiccation treatments m...

Plants are valuable sources of a vast array of chemical compounds like alkaloids, flavonoids, pigments, antimicrobials, pharmaceutical, etc. The majority of the compounds were produced by plants during different stages of cell, tissues and organ differentiation. Plant tissue culture is the process by which parts of plant can be grown in vitro condition in a sterile culture medium. The nutrient ...

to evaluate canola cultivars response to physiological characteristics and grain yield end seasonal drought stress in weather condition of ahvaz, farm experiments were done at research farm of khuzestan agriculture and natural resources center. during 2007-2008 and 2008-2009 crop years. farm test comprised drought stress was done as split plot form with randomize complete block design with four...

background : one of the best ways to control the malaria disease and to be protected human against anopheles mos­quito biting is the use of repellents. throughout repellents, herbal ones may be an appropriate and safe source for protection. methods : chemical constituents of achillea vermiculata and satoreja hortensis were determined by using gas chromatography-mass spectrometry. efficacy and t...