over the past years, lake water levels have decreased considerably by various factors and the subsequent emergence of salt plain has brought disastrous consequences that need an essential action. therefore, this study aimed to investigate the effects of drying up and increasing lake water salt and landsat satellite images were used during different time periods in 9 years. to identify the new a...

fars province is one of the natural habitats of pyrus species in iran. harvesting of fruits, deforestation, expansion of agriculture and overgrazing in recent years has threatened the wild pear open forests and imposed detrimental effects on their natural regeneration, therefore, investigation on propagation of wild pear species for afforestation is needed. this research was carried out to deve...

in vitro propagation of plant has played a very important role in rapidmultiplication of cultivars with desirable traits and production of healthy and disease-free plants. in the present investigation, the objectives were to optimize the micropropagation of rose hybrid ‘black baccarat’ cultivar. in proliferation step, the nodal segments (1.5 cm) was cultured on both liquid and solid media (ms, ...

Objective: To develop in vitro callus induction in nodal segments of Decalepis hamiltonii and investigate the antioxidant potential of the callus. Methods: In this study, nodal segments of Decalepis were cultured on Murashige and Skoog (MS) medium supplimented with various concentration of 2,4-D for callus induction and later subcultured on various concentration of NAA and BAP. The antioxidant ...

The purpose of this study was to develop a protocol for the micropropagation of Pinus taeda from juvenile material. Apical shoots and nodal segments were inoculated into MS, DCR or WV medium. After 90 days, the explants were transferred to WV5 medium supplemented or not with 6-benzyladenine (BA) (2.0 μM) in order to induce multiple shoot formation. For root induction, a medium composed of water...

This paper presents new methods for efficient extraction of intersection curves between iso-surfaces of any pair of co-located 3D scalar fields. The first method is based on the Marching Cubes algorithm which has been enhanced to produce an additional data structure that makes it possible to reduce the complexity of the general surface intersection extraction from O(N) to O( √ N), where N denot...

An efficient method was developed for plant regeneration and establishment from alginate encapsulated synthetic seeds of Rauvolfia serpentina. Synthetic seeds were produced using in vitro proliferated microshoots upon complexation of 3% sodium alginate prepared in Llyod and McCown woody plant medium (WPM) and 100 mM calcium chloride. Re-growth ability of encapsulated nodal segments was evaluate...

Electric organs in Sternarchidae are of neural origin, in contrast to electric organs in other fish, which are derived from muscle. The electric organ in Sternarchus is composed of modified axons of spinal neurons. Fibers comprising the electric organ were studied by dissection and by light- and electron microscopy of sectioned material. The spinal electrocytes descend to the electric organ whe...

Objectives: Dual pathways have a determinant role in the occurrence of atrio nodal tachyarrhythmia (AVNRT). The aim of present study is to determine the role of slow pathway (SP) in the concealment zone and protective role of AV node during atrial fibrillation (AF). Material &Methods: In 7 isolated nodal rabbit preparation zone of concealment and concealed conduction is quantified by Specif...