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European Online Journal of Natural and Social Sciences
   [13 followers]  Follow    
  This is an Open Access Journal Open Access journal
     ISSN (Print) 1805-3602
     Published by European Online Journal of Natural and Social Sciences Homepage  [1 journal]
  • Investigation of Pistachio Micro-Propagation (Proliferation) (Pistacia
           Vera L.)

    • Authors: Mansour Kalantar, O Jadidi
      Abstract: Tissue culture and micro-propagation is a branch of applied sciences in plant biotechnology which is of critical significance these days. This has played a great role in increasing different species of tree, shrub, herbaceous, etc. It merits some advantages such as ease of propagation, maintenance of genetic stability, lack of time limitation and place. In this research, pistachio rootstock (Pistacia vera L.) micro propagation has been selected due to its prevalence in Iran, the heavy cost of propagation through mating, the spread of common diseases of propagation by the current propagation methods and specially the market's demand for asexual propagation. In this study, some media cultures including knop, ½ knop, Ms, ½ Ms, Dkw, ½ Dkw were investigated in factorial statistical design with two hormones called BAP in four levels (0.5, 1, 1.5, 2) mg/l and NAA in Tri levels (0,0.1,0.2) mg/l and by Tri repetition. Results showed that most suitable treatment for explant (shoot tip) sterilization of samples is using %96 ethanol and %15 vaitex and washing with water, which then was cultured for proliferation. Also, the results showed DKW media is more suitable relative to others media and high dose of BAP (2 mg/l) and low dose of NAA (0 mg/l) in proliferation is suitable.
      PubDate: 2014-07-26
      Issue No: Vol. 3 (2014)
       
  • Comparing the Effect of Quality of life, Psychological Stressors and
           Coping Strategies in Kidney Patients and Normal People

    • Authors: Mina Ghadiri nofarast, Hamidreza Aghamohammadiyan Sherbaf, Abdolali Yaghoubi
      Abstract: The current research has been conducted with the aim of comparing the effect of quality of life, stressors and coping strategies in kidney patients and healthy people. The current research methodology is correlative. The population includes all of the kidney patients visiting Montaserieh hospital in Mashad during spring 2013 in a time span of one moth. 50 kidney patients and 50 healthy individuals were randomly chosen as the sample. The tools used in this research were questionnaires of psychological stressors, quality of life and coping strategies. The achieved data were analyzed by the use of analysis of covariance ANCOVA (a multivariate analysis of covariance). Results showed that kidney patients have less quality of life and more amounts of stress than the healthy individuals. On the other hand, the patients take more use of emotion-focused coping strategies. Since the current study is a casual-comparative study it could be alleged that variables of psychological stressors, coping strategies and quality of life had a casual role in formation of kidney disease.
      PubDate: 2014-07-26
      Issue No: Vol. 3 (2014)
       
  • On the Relationship between Stock Returns and Trading Volume: A Case Study

    • Authors: Amir Mansour Tehranchian, Masoud Behravesh, Saleh Hadinia
      Abstract: This article focuses on the experiment about the causality relationship between the stock returns and the trading volume of the member companies at Tehran Stock Market. Accordingly, the seasonal data from these companies within the years 1996 to 2009 are used to estimate the vector error correction model. The results obtained from the Philips–Perron Unit Root Test demonstrated that the above mentioned variables are integrated of the order one and thus there is a long run equilibrium relationship between them. The estimation from the error correction model proved that there is a positive and bidirectional relationship between these variables. However the stock returns has a stronger effect on the trading volume. Therefore, through a psychological analysis, the "Mass Behavior" hypothesis in the said stock market is not approved. Moreover, the estimation of the error correction coefficient indicated that balancing the said variables towards the long run equilibrium volumes, is slow.
      PubDate: 2014-07-26
      Issue No: Vol. 3 (2014)
       
 
 
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