نتایج جستجو برای: r c m
تعداد نتایج: 1767751 فیلتر نتایج به سال:
In this short article, we observe that the path of particle of mass $m$ moving along $mathbf{r}= mathbf{r}(t)$ under pseudo-force $mathbf{A}(t)$, $t$ denotes the time, is given by $mathbf{r}_d= int(frac{dmathbf{r}}{dt} mathbf{A}(t)) dt +mathbf{c}$. We also observe that the effective force $mathbf{F}_e$ on that particle due to pseudo-force $mathbf{A}(t)$, is given by $ mathbf{F}_e= mathbf{F} mat...
the direct and indirect methods in solvent media and grinding method in a solvent-free media were used to prepare the mcm-41/zno and mcm-48/zno photocatalysts. the x-ray diffraction (xrd) patterns showed that zinc oxide nanoparticles were put into mcm-41 and mcm-48 substrates and there were zno crystallites as secondary phase in the extra framework of mesoporous materials. the decrease of surfa...
the value of clinical use of tumor markers cea and ca15-3 for early detection of recurrent breast cancer still is a controversial. this study was investigated relationship between tumor markers cea and ca15-3 and recurrence breast cancer. data regarding 147 women who had breast cancer were entered into the study. patients were reviewed for 120 months after treatment. maximum time for relapse wa...
odontogenic tumors constitute a group of heterogeneous lesions of benign and malignant neoplasms with variable aggressiveness. ameloblastomas are a group of benign but locally invasive neoplasms that occur in the jaws and are derived from epithelial elements of the tooth-forming apparatus. we previously described orosomucoid-1 protein expression in odontogenic myxomas. however, whether orosomuc...
introduction: for thousands of years, plants have been used as the main source of drug worldwide. recently, it has been found out that the plant artemisia annua and especially its derivatives such as artemether have anticancer properties. methods: in this study, the anticancer effect of artemether on mcf-7 breast cancer cell line was examined. mtt assay was used to assess the viability of cance...
conclusions these results show that zen and α-zol enhance the rate of cell division in er positive cells and therefore, exposure to this mycotoxin may increase the risk of breast cancer. results the results obtained from the present study demonstrated that both zen and α-zol enhance the cell viability of mcf-7 especially at low doses (1 - 500 ng/ml) and at a high dose of 125µg/ml after 24 and 4...
let $g$ be a $p$-group of nilpotency class $k$ with finite exponent $exp(g)$ and let $m=lfloorlog_pk floor$. we show that $exp(m^{(c)}(g))$ divides $exp(g)p^{m(k-1)}$, for all $cgeq1$, where $m^{(c)}(g)$ denotes the c-nilpotent multiplier of $g$. this implies that $exp( m(g))$ divides $exp(g)$, for all finite $p$-groups of class at most $p-1$. moreover, we show that our result is an improvement...
the copper(ii) complex [cu(pic)2]·2h2o was synthesized with 2-picolinic acid (hpic) and copper acetate as reactants by room temperature solid-solid reaction. the composition and structure of the complex was characterized by elemental analyses, single crystal x-ray diffraction, x-ray powder diffraction, ft-ir spectroscopy and thermogravimetry-differential scanning calorimetry. the crystal struct...
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