there are many problems in yield, quality and and persistence regular bearing in olive trees, one of these problems is nutritional imbalances. this study carried out in order to evaluate nutritional status of olive orchards in tarom region of zanjan province. samples of soil and leaf were taken from 79 olive orchards in june 2012 and 2013 and were analyzed by using appropriate laboratory method...

I N T R O D U C T I O N Since the f inding that a fraction o f the Ca efflux in squid axons might be involved in a N a < o u p l e d exchange mechanism (Blaustein and Hodgkin , 1969) a great deal o f work has been devoted to analyze this particular unidirectional Ca f u x . Al though not all the features o f the Ca efflux have been firmly established, most o f the quantitative dependencies on N...

high-density planting system is one of the effective methods for improving production and profitability of tree orchards. in this research, the effects of four planting densities (1904, 2666, 3137 and 4800 tree/ha) on annual shoot growth, tree yield, physicochemical properties of fruit and leaf mineral contents of apple (malus domestica borkh cv ‘granny smith’treegrafted on m26 clonal rootstock...

Although an axoplasmic Ca(2+) increase is associated with an exocytotic acetylcholine (ACh) release from the parasympathetic postganglionic nerve endings, the role of voltage-dependent Ca(2+) channels in ACh release in the mammalian cardiac parasympathetic nerve is not clearly understood. Using a cardiac microdialysis technique, we examined the effects of Ca(2+) channel antagonists on vagal ner...

Tully, Keith and Steven N. Treistman. Distinct intracellular calcium profiles following influx through Nversus L-type calcium channels: role of Ca -induced Ca release. J Neurophysiol 92: 135–143, 2004; 10.1152/jn.01004.2003. Selective activation of neuronal functions by Ca is determined by the kinetic profile of the intracellular calcium ([Ca ]i) signal in addition to its amplitude. Concurrent ...

Kawada, Toru, Toji Yamazaki, Tsuyoshi Akiyama, Kazunori Uemura, Atsunori Kamiya, Toshiaki Shishido, Hidezo Mori, and Masaru Sugimachi. Effects of Ca channel antagonists on nerve stimulation-induced and ischemia-induced myocardial interstitial acetylcholine release in cats. Am J Physiol Heart Circ Physiol 291: H2187–H2191, 2006. First published June 9, 2006; doi:10.1152/ajpheart.00175.2006.—Alth...

objective: alzheimer’s disease is the most common type of neurodegenerative disorder. it has been suggested that oxidative stress can be one of the pathological mechanisms of this disease. carnosic acid (ca) is an effective antioxidant substance and recent studies have shown that its electrophilic compounds play a role in reversing oxidative stress. thus we tried to find out whether ca administ...

The interaction between nitrogen cycling and carbon sequestration is critical in predicting the consequences of anthropogenic increases in atmospheric CO2 (hereafter, Ca). The progressive N limitation (PNL) theory predicts that carbon sequestration in plants and soils with rising Ca may be constrained by the availability of nitrogen in many ecosystems. Here we report on the interaction between ...