Influence of Rotational Speed on Isothermal Piston Compression System.

An isothermal piston is a device that can achieve near-isothermal compression by enhancing the heat transfer area with a porous media. However, flow resistance between the porous media and the liquid is introduced, which cannot be neglected at a high operational speed. Thus, the influence of rotational speed on the isothermal piston compression system is analyzed in this study.

Electron spectroscopic study of nanoplasma formation triggered by intense soft x-ray pulses.

Using electron spectroscopy, we investigated the nanoplasma formation process generated in xenon clusters by intense soft x-ray free electron laser (FEL) pulses. We found clear FEL intensity dependence of electron spectra. Multistep ionization and subsequent ionization frustration features are evident for the low FEL-intensity region, and the thermal electron emission emerges at the high FEL intensity.

Investigations of the valence-shell excitations of molecular ethane by high-energy electron scattering.

The differential cross sections and generalized oscillator strengths for the low-lying excitations of the valence-shell 1e orbital electron in ethane have been measured for the first time at a high incident electron energy of 1500 eV and a scattering angular range of 1.5°-10°. A weak feature, termed X here, with a band center of about 7.

Spectral CT imaging of myocardial infarction: preliminary animal experience.

Objectives: To evaluate the capability of spectral CT imaging to detect the different stages and angiogenesis of myocardial infarction (MI).

Methods: MI was surgically induced in 40 rabbits that were evenly divided into four stages of MI: 6 h (6H), 3 days (3D), 7 days (7D) and 14 days (14D). Spectral CT was performed at 10 s, 1 min and 3 min after intravenous contrast medium administration.

Therapeutic effect of intermittent hypobaric hypoxia on myocardial infarction in rats.

Intermittent hypobaric hypoxia (IHH) preconditioning protects the heart against ischemic injuries. However, little is known about the therapeutic effect of IHH on myocardial infarction (MI). The aim of this study was to test whether IHH treatment influences infarct size and cardiac performance after MI.

Expression of anion exchanger 1 is associated with tumor progress in human gastric cancer.

Purpose: Anion exchanger 1 (AE1) is a transmembrane glycoprotein which is abundantly expressed in erythrocyte plasma membrane and mediates the electroneutral exchange of Cl(-) and HCO(3) (-). We previously reported that the AE1 protein was unexpectedly expressed in the gastric and colonic cancer and take part in the carcinogenesis of the cancer cells. The aim of the present study is to determine the potential clinical implications of AE1 expression in gastric carcinoma.

Expression of cytoplasmic p16 and anion exchanger 1 is associated with the invasion and absence of lymph metastasis in gastric carcinoma.

The tumor suppressor p16 is a negative regulator of the cell cycle, commonly believed to act in the nucleus. We recently found that p16 protein is expressed in the cytoplasm of gastric cancer cells, concomitantly with anion exchanger 1 (AE1). The aim of this study was to analyze the significance of cytoplasmic p16 and its relationship to AE1 in the progression of gastric cancer.

[Phase transitions of surface-stabilized liquid crystal studied by temperature-dependent FTIR spectroscopy].

The FTIR spectra were measured for liquid crystal molecules in CaF2 cell over a temperature range of 40-150 degrees C. The alkyl chain transformed from ordered zigzag-dominated conformation to disordered gaucheness-dominated conformation with increasing temperature. Meanwhile, the degree of freedom of the rotation of the carbonyl group increased, the co-plane interaction between the carbonyl group and the phenyl ring broke, and the conjugation between the C=O bond and the phenyl ring was reduced at the S(CA)* --> S(A) phase transition point, followed by the increase of the plane angle between the two phenyl rings.

[Analysis of prognostic factors in microsurgery of intratemporal facial nerve schwannoma].

Objective: To discuss prognostic factors in microsurgery of intratemporal facial nerve schwannoma.

Methods: Clinical and follow-up materials from 13 cases of facial nerve schwannoma were analyzed retrospectively. Spearman rank-order correlation and nonparametric Mann-Whitney U test from SPSS 10.

Expression of TGF-beta1, TbetaRII and Smad4 in colorectal carcinoma.

Background: Many colorectal carcinomas are resistant to the growth inhibitory response of transforming growth factor-beta (TGF-beta) due to alterations of components along the TGF-beta signaling pathway. The aim of this study was to examine the expression of TGF-beta1, TbetaRII and Smad4 in human colorectal carcinoma and their relationships with cancer growth.

Methods: Immunohistochemistry and in situ hybridization were performed in 38 cases of colorectal carcinoma.

[Study on vibrational spectra and structure of 4-mercaptopyridine monomer and dimer using density functional theory].

The optimized molecular structure and vibrational frequencies of 4-mercaptopyridine monomer and dimer were studied by density functional theory using B3LYP method with the 6-311++G(d, p) basis set. On the basis of the calculations, the assignments of vibrational spectra were performed on monomer and dimer, and the change in structure and vibrational spectrum of dimer as well as the intermolecular force of forming dimer were investigated. It was found that the two pyridine ring planes are vertical to each other, and the dimer was formed through H-bonding, which is between the nitrogen on one ring and the hydrogen of SH moieties on another.

[Significance of galectin-3 and CD44v6 expression in differential diagnosis of thyroid nodules].

Objective: To investigate the difference of galectin-3 and CD44v6 expression between benign and malignant thyroid nodules, and to evaluate their clinical value in distinguishing thyroid cancer from benign thyroid nodules.

Methods: The expression of galectin-3 and CD44v6 was immunohistochemically detected by the ABC method in 143 benign and malignant thyroid nodule samples.

Results: Expression of these two markers in benign thyroid nodules: galectin-3 was negative in 10 cases of para-cancer normal tissue and 14 cases of benign nodules found in the other benign thyroid disease.

Defective expression of transforming growth factor beta receptor type II is associated with CpG methylated promoter in primary non-small cell lung cancer.

Purpose: Reduced expression of the transforming growth factor beta receptor type II (TGF beta RII), a key inhibitor of epithelial cell growth and tumor suppressor gene, was reported frequently in many types of tumors including non-small cell lung cancer (NSCLC). This study explored the significance of the TGF beta RII gene in NSCLC carcinogenesis.

Experimental Design: With 43 independent pairs of tumor and paracarcinoma tissue samples from patients with primary NSCLC, we carried out PCR-denaturing gradient gel electrophoresis screening for DNA variants over the coding sequence of the TGF beta RII gene, immunohistochemical assay of TGF beta RII expression, methylation-specific PCR analysis, and semiquantitative reverse transcription-PCR.