Let $G$ be a graph with vertex set $V(G)$ and edge set $E(G)$, and let $d_u$ denote the degree of vertex $u$ in $G$. The Randi'c index of $G$ is defined as${R}(G) =sum_{uvin E(G)} 1/sqrt{d_ud_v}.$In this paper, we investigate the relationships between Randi'cindex and several topological indices.

to evaluate the effect of nitrogen fertilizer amounts on grain yield of forage corn in 2012, a pilot was implemented in islamic azad university agricultural research station, isfahan, as a split plot in a randomized complete block design. main plots consisted of four levels: control (no fertilization ) , 50 , 100 and 150 kg per ha nitrogen from urea source and subplots , including several varie...

background and objective: hyperemesis gravidarum (hg) is defined as vomiting sufficiently severe to produce weight loss, dehydration, electrolyte abnormalities. interleukin-6 (il-6), a pro-inflammatory and trophoblast-derived cytokine has ability to induce trophoblasts to secrete human chorionic gonadotropin (hcg). the purpose of our study was to assay the level of il-6 and β-hcg in serum of pr...

the leukocyte mi gration test (lht) in the prese nce of na t i v e igg, and l l e v amis ole were studi ed in 9 patients su f f e ring from cla s s i c a l r h e umatoid ar.thri t i s be f o r e a nd after treatment with l evamisole . fi f teen heal thy b l o od dono rs we r e s i mi l a r ly l nvestig ated a s cont r o ls . t- l ympho c yte s ub-popu lations (to ta l a nd active) a nd b-c el l...

in order to investigate the effects of drought stress on grain yield and its components, a study was carried out (2011) as split plots in randomized complete blocks design in isfahan (32° 40'  n,51° 48' e). main factor was drought stress in four levels including irrigation after 80, 100, 120, and 140 mm evaporation from evaporation pan (class a) and subplots were three cultivars (sirena, record...

background: breast cancer is the most common cancer in women, containing approximately one third of all illnesses in women. assessment of molecular markers is valuable in predicting the outcome of disease and decision making for optimal treatment. the purpose of this study was to determine the relationship between estrogen and progesterone receptors with her-2, ki67, p53, and clinicopathologica...

introduction there is an agreement that eating disorder is related to psychological characteristics and on the other hand, level of ghrelin hormone, intercellular adhesion molecule-1 (icam-1) and e-selection also change during eating disorders. we aimed to study the relationship between eating disorders and rest levels, icam-1, e-selection, and ghrelin hormone in obese people. materials and met...

introduction: the presence of her-2 has been shown to be a prognostic factor in many kinds of cancers, but its role in head and neck squamous cell carcinoma (hnscc) is not still defined. the purpose of the current study is to investigate the role of her-2 in hnscc and its correlation with various clinicopathologic parameters.   materials and methods: peripheral blood samples were obtained from ...