Hasil untuk "hep-ex"

Masamitsu Kuroki, Ryoichi Shoji, Junya Tsurukiri

Natalie Dierick, Stuart Kostalas

Daphne Moutsoglou, Byron P. Vaughn

David A. Katzka

Angela Barnes, Abdul-Rahman Abualruz, John Erikson L. Yap

Kento Shionoya, Haruki Uojima

C. Richard Boland

Diana L. Snyder, David A. Katzka

Y. Tautayev

[1] N.A Dobtoyin, A brief history of the first period of field work of cosmic rays at the Physics Institute of the USSR, FIAN, Moscow 1998 [2]. G.T. Zacepin, Nuclear cascade process and its role in the development of broad atmosfer showers // DAN USSR, 1949, T. 67, P. 993 [3] Sadykov T.Kh., Determining the height of the interaction of hadrons to install Hadron-44" // AGU Abay. 2003, No1 (7), P. 200-201. [4] S. Towers, Kernel probability density estimation methods, State University of New York at Stony Brook. [5] Observation of Long-Range, Near-Side Angular Correlations in Proton-Proton Collisions at the LHC. The CMS Collaboration_ . arXiv:1009.4122v1 [hep-ex] 21 Sep 2010 Studies of interactions of cosmic ray particles with a dense target using X-ray emulsion chambers (REC) have been carried out on the high altitude research station of cosmic rays, located at an altitude of 3340 m in the Tien-Shan mountains. [1,2]. REC method is based on X-ray emulsion detectors that enable to collect statistics for determined time period. The main object of study is a group of genetically related particles (gamma rays and hadrons) with sufficiently high energy, which result from interaction with solid target or with air nuclei of primary high-energy particles. These groups of particles called families. To determine azimuthal anisotropy in interaction of cosmic-ray particles two-particle correlations were used, which is a powerful tool for studying the formation mechanism of particles in high-energy collisions of hadrons and nuclei. These studies provide important information characterizing quantum chromodynamics (QCD) in the power mode, especially hadronization mechanism and possible collective effects due to the particles high density, which can be achieved in such collisions. From a consideration of the distribution presented it is evident that it is divided into three families, separated from each other. The left side corresponds to small EPC heights, the central part grouped around target events and the right side with the families of atmospheric interactions. Thus, using information from ionization calorimeter and application of above criteria enable to select 2657 gamma rays families from 10,199 recorded events. Further, 462 events were selected at gamma rays families with n≥4. Two-dimensional correlation functions as Δη-Δφ were studied for these events. Where Δη – difference by pseudorapidity (η = -ln (tan (θ / 2)) with the polar angle, measured as the deviation from beam axis, Δφ is the difference between azimuth angles of two particles. To find two-dimensional correlation function in plane of Δη-Δφ Gaussian kernel PDE can be application in Monte-Carlo generation with N events generated in a k-dimensional parameter space. These events are distributed by some unknown PDF, f(x). Gaussian kernel method carry out an assessment the value of the PDF at x point by the summary of Gaussains that centered at the Monte Carlo generated points, {yi, i=1, N} [4]:

S. Bhattacharyya, Vasanthakumar Sekar, B. Majumder et al.

Ana Francisca Gomes da Silva, E. L. Amorim, M. Pranchevicius

The aim of this study was to analyze the antitumor activity of Anacardium humile A. St.-Hil., Brosimum gaudichaudii Trecul and Tabebuia avellanedae Lorentz ex Griseb species, which are distributed in the Cerrado region of Brazil. Qualitative and quantitative analyses were also conducted on the bark and leaf extracts and antioxidant and cytotoxic activities were studied. The results showed that the bark and leaf extracts of A. humile exhibited the highest contents of phenolic compounds and optimal antioxidant activity. The leaf extract of T. avellanedae had the highest content of flavonoids, displayed high efficiency as a ferrous ion chelating agent and inhibited the growth of the human laryngeal carcinoma (HEp-2) cell line by 88.0% at the concentration of 50 µg/ml. The leaves of B. gaudichaudii had higher levels of condensed tannins, flavonoids and coumarins compared with that of the bark. There was a correlation between inhibition of the NCI- human lung cancer (H292) cell line and the content of condensed tannins and antiradical activity and also between the inhibition of human colon carcinoma (HT-29) cell growth and the antioxidant and chelating activity of ferrous ion. Our data provide evidence that bark and leaf extracts of A. humile and leaves of T. avellanedae possess anticancer activity; therefore, the isolation and identification of the active ingredients of these plant tissues should be conducted to explore their therapeutic potential.   Key words: Antiproliferative, Hep-2 cells, HT-29 cells, medicinal plants, NCI-H292 cells, phenolic compounds.

Hyun-Ji Jung, Hye Jin Kim, O. Kwon et al.

Department of Nutritional Science and Food Management, College of Health Sciences, Ewha Womans University, Seoul 120-808, Kore aReceived September 22, 2015/Revised October 13, 2015/Accepted October 13, 2015The purpose of this study was to determine the effect of Pueraria lobate-root based combination sup-plementation containing Rehmannia glutinosa and exercise on histone modification in ovariectomized rat hindlimb skeletal muscle. Sixty rats were fed with high fat diet and randomly assigned into the following groups for 8 weeks: 1)HSV; High fat+Sedentary+Vehicle, 2)HSP; High fat+Sedentary+PR, 3)HSH; High fat+Sedentary+Estradiol, 4)HEV; High fat+Ex+Vehicle, 5)HEP; High fat+Ex+PR, 6)HEH; High fat+Ex+Estradiol. Exercise consisted of low intensity treadmill exercise(1-4th wk:15 m/min for 30 min, 5-8th wk: 18 m/min for 40 min, 5 times/week). The result of this study showed that exercise and Pueraria and Rehmannia glutinosa intake suppressed weight gain. Furthermore, exercise and Pueraria and Rehmannia glutinosa intake increased muscle mass. This study observed H3K9 acetylation and demethylation in plantaris muscle in exercised group, but no difference in soleus muscle. To test whether the decrease in HDAC4, HDAC5 and G9a mRNA levels after exercise and Pueraria/Rehmannia glutinosa intake, HDAC4, HDAC5 and G9a mRNA levels were determined by real-time PCR. Only ex-ercise induced HDAC5 and G9a mRNA reduction in plantaris muscle, but not in soleus muscle. In conclusion, these data demonstrates that exercise and Pueraria/Rehmannia glutinosa intake effect on body compositions. These changes are regulated by epigenetic modifications, such as histone acetyla-tion and methylation. Future studies should focus on gene-specific epigenetics and other epigenetic mechanism for Pueraria/Rehmannia glutinosa intake.Keywords :