The Twist-1 transcription factor and its interacting protein Akirin-2 regulate apoptosis. We found that in glioblastomas, highly malignant brain tumors, Akirin-2 and Twist-1 were expressed in glial fibrillary acidic protein positive tumor regions as well as in tumor endothelial cells and infiltrating macrophages / microglia. Temozolomide (TMZ) induced the expression of both molecules, partly sh...

The spin–dependent twist–3 and 4 nucleon matrix elements d (2) and f (2) describing power corrections to the Bjorken and Ellis–Jaffe sum rules are computed in the instanton vacuum. A systematic expansion in the small packing fraction of the instanton medium, ¯ ρ/ ¯ R ≪ 1, is performed. We find that the twist–3 matrix element d (2) is suppressed [of order (¯ ρ/ ¯ R) 4 ], while the twist–4 matrix...

We show that the instanton model of the QCD vacuum indicates the parametric smallness of the twist-3 contributions to the polarized structure function h L. This smallness is related to the diluteness of the QCD instanton vacuum. 1. Among higher twist parton distributions the twist-3 distributions play a special role. In many physical observables the twist-3 distributions enter not suppressed by...

We present a higher-twist production mechanism for η c and χ J charmonium at large momentum fraction x F in pion-nucleon collisions. The higher-twist contribution is essentially independent of x F and therefore becomes dominant at large x F , where the leading-twist contribution falls off as (1 − x F) 3. We show that the higher-twist mechanism produces longitudinally polarized χ 1 and χ 2. For ...

introduction left ventricular (lv) twist is believed to store potential energy and plays an important role in generating diastolic suction. recent advances in echocardiography techniques have allowed quantification of lv twist. the aim of the present study was to compare lv twist and torsion in healthy human subjects determined by velocity vector imaging (vvi) and tissue doppler imaging (tdi) a...

Structure functions of polarized spin-1 hadrons will be measured at various accelerator facilities in the near future. Recently, transverse-momentum-dependent and collinear parton distribution were theoretically proposed twist 3 4 addition to twist-2 ones, so that full investigations became possible for structure same level with those spin-1/2 nucleons. Furthermore, twist-3 tensor-polarized mul...

We have calculated the Wandzura-Wilczek contribution to the twist-3 part of γ * γ → 2π amplitude. It describes interaction of the longitudinally polarized virtual photon with the real one, and it is suppressed by 1/Q, where Q 2 is the virtuality of the γ * , as compared to the twist-2 contribution. We have found that, in the Wandzura-Wilczek approximation, factorization applies to the twist-3 a...

We perform a QCD analysis for the radiative decay of a heavy 3 S 1 quarko-nium into the tensor meson f 2 (1270). We make an attempt to separate the nonperturbative effect related to the quarkonium and that related to the ten-sor meson, the former is represented by NRQCD matrix elements, while the later is parameterized by distribution amplitudes of gluons in the tensor me-son at twist-2 level a...

We perform a QCD analysis for the radiative decay of a heavy 3 S 1 quarko-nium into the tensor meson f 2 (1270). We make an attempt to separate the nonperturbative effect related to the quarkonium and that related to the ten-sor meson, the former is represented by NRQCD matrix elements, while the later is parameterized by distribution amplitudes of gluons in the tensor me-son at twist-2 level a...

Review on TWIST2, with data on DNA/RNA, on the protein encoded and where the gene is implicated.