Scaling properties of hyperon production in Au+Au collisions at square root [sNN]=200 GeV.

We present the scaling properties of Lambda, Xi, and Omega in midrapidity Au+Au collisions at the Brookhaven National Laboratory Relativistic Heavy Ion Collider at sqrt[s_{NN}]=200 GeV. The yield of multistrange baryons per participant nucleon increases from peripheral to central collisions more rapidly than that of Lambda, indicating an increase of the strange-quark density of the matter produced. The strange phase-space occupancy factor gamma_{s} approaches unity for the most central collisions.

[The construction and expression of PcDNA3.1(+)/GFP-TIMP-2 in human ameloblastoma cell].

Objective: To construct the eukaryotic expression vector of TIMP-2 gene and to explore its expression in human ameloblastoma cell in vitro.

Methods: The aimed gene fragment was obtained by RT-PCR. And then, molecmicrolar cloning technology and enzyme digestion were used to connect the gene with the plasmid PcDNA3.

[Effects of apoptosis of Tca8113 cells induced by adriamycin on telomerase and telomere repeat binding factor proteins].

Objective: To investigate the role of telomerase and telomere repeat binding factors (TRF) in apoptosis.

Methods: The proliferative activity of Tca8113 cells was assessed by methyl thiazolyl tetrazolium (MTT) assay. After Tca8113 cells were treated with adriamycin at 5 mg/L, apoptotic morphology was observed under microscope with Giemsa staining and apoptosis examined by flow cytometry; analysis of telomerase activity was performed by TRAP-enzyme-linked immunosorbent assay; expression and expression level of TRF proteins were detected with immunohistochemical staining and immunofluorescence label assay, respectively.

Longitudinal double-spin asymmetry and cross section for inclusive jet production in polarized proton collisions at square root of s = 200 GeV.

We report a measurement of the longitudinal double-spin asymmetry A(LL) and the differential cross section for inclusive midrapidity jet production in polarized proton collisions at square root of s = 200 GeV. The cross section data cover transverse momenta 5 < pT < 50 GeV/c and agree with next-to-leading order perturbative QCD evaluations. The A(LL) data cover 5 < pT < 17 GeV/c and disfavor at 98% C.

Direct observation of dijets in central Au+Au collisions at sqrt[sNN]=200 GeV.

The STAR Collaboration at the Relativistic Heavy Ion Collider reports measurements of azimuthal correlations of high transverse momentum (pT) charged hadrons in Au+Au collisions at higher pT than reported previously. As (pT) is increased, a narrow, back-to-back peak emerges above the decreasing background, providing a clear dijet signal for all collision centralities studied. Using these correlations, we perform a systematic study of dijet production and suppression in nuclear collisions, providing new constraints on the mechanisms underlying partonic energy loss in dense matter.

Forward neutral pion production in p + p and d + Au collisions at square root sNN=200 GeV.

Measurements of the production of forward pi0 mesons from p + p and d + Au collisions at square root sNN=200 GeV are reported. The p + p yield generally agrees with next-to-leading order perturbative QCD calculations. The d + Au yield per binary collision is suppressed as eta increases, decreasing to approximately 30% of the p + p yield at eta =4.

Identified baryon and meson distributions at large transverse momenta from Au + Au collisions at square root sNN=200 GeV.

Transverse momentum spectra of pi+/-, p, and p up to 12 GeV/c at midrapidity in centrality selected Au + Au collisions at square root sNN=200 GeV are presented. In central Au + Au collisions, both pi +/- and p(p) show significant suppression with respect to binary scaling at pT approximately >4 GeV/c. Protons and antiprotons are less suppressed than pi+/-, in the range 1.

[Radiation-inducible promoters-mediated cdglytk gene in the treatment of buccal carcinoma in golden hamster].

Objective: To observe the therapeutic effect of CDglyTK gene mediated by radiation-inducible promoters in the treatment of buccal carcinoma in Golden Hamster.

Methods: Animal models of buccal carcinoma in golden hamster were established by painting 0.5% dimethyl-benzanthracene.

[Combined repair of large defect caused by radical surgery of advanced tongue cancer with rib-major pectoralis myocutaneous flap carrying costal parietal pleura].

Objective: To explore the clinical value and safety of using rib-major pectoralis myocutaneous flap carrying costal parietal pleura in combined repair of large soft and hard tissue defect caused by radical surgery of advanced tongue cancer.

Methods: Six patients with advanced tongue carcinoma involving the floor of mouth and mandible were performed combined radical neck dissection with glossectomy and mandibulectomy, which caused large soft and hard tissue defect. Six rib-major pectoralis myocutaneous flaps carrying costal parietal pleura were transferred for immediate repair of the large defects.

[Construction and selection of siRNA expression cassettes targeting human telomerase reverse transcriptase gene in vitro].

Objective: To determine whether the human telomerase reverse transcriptase (hTERT) gene silencing could be effectively induced by PCR-derived siRNA expression cassettes (SEC) transfected by the fifth generation polyamidoamine dendrimer (G5 PAMAM-D) in Tca8113 cells.

Methods: Four SEC were rationally designed and constructed based on a two-step PCR reaction. The SEC were then transferred into Tca8113 cells using G5 PAMAM-D, and hTERT expression was investigated by real-time fluorescence-quantitative reverse transcriptase-PCR and western blot analysis.

Strange baryon resonance production in sqrt s NN=200 GeV p+p and Au+Au collisions.

We report the measurements of Sigma(1385) and Lambda(1520) production in p+p and Au+Au collisions at sqrt[s{NN}]=200 GeV from the STAR Collaboration. The yields and the p(T) spectra are presented and discussed in terms of chemical and thermal freeze-out conditions and compared to model predictions. Thermal and microscopic models do not adequately describe the yields of all the resonances produced in central Au+Au collisions.

[Intraoral submandibular gland excision and how to deal with external maxillary artery].

Objective: To investigate the feasibility and safety of intraoral submandibular gland excision.

Methods: Analyze the relationship between the external maxillary artery and submandibular gland, and offer a reliable anatomical base for 10 cases of intraoral submandibular gland excision, including 8 cases of chronic sialadenitis, 1 case of pleomorphic adenoma and 1 case of cyst of submandibular gland.

Results: The external maxillary artery went across the surface of gland submandibular, and its branches provided nutrition for the gland in most cases.

[Study on structures of blattela germanica allergen, Bla g 2 expressed by eukaryotic and prokaryotic vectors using fluorescence and CD spectra].

The recombinant allergen, Bla g 2, was expressed by prokaryotic vector E. coli and eukaryotic vector P. Pastoris.

[Synthetic radiation-inducible promoter mediated CDglyTK gene in treatment of Tca8113 cells].

Objective: To observe the therapeutic effect of CDglyTK gene mediated by synthetic radiation-inducible promoter in the treatment of Tca8113 cells.

Methods: CDglyTK gene in pCEA-CDglyTK was subcloned into pcDNA3.1 (+) to construct plasmid pcDNA3.

[Lymphatic metastasis intensity of and lymphadenectomy for thoracic esophageal squamous cell carcinoma].

Background & Objective: The intensity of lymphatic metastasis consists of lymph node metastasis number (LMN) and lymph node metastasis ratio (LMR). LMR is the ratio of positive nodes to dissected nodes. LMN and LMR are 2 important prognostic factors of esophageal cancer, and are adopted in tumor staging.

[Association of matrix metalloproteinase-2 activity with cell proliferation and growth in ameloblastoma].

Objective: To investigate the relationship between matrix metalloproteinase-2 (MMP-2)activity and cell proliferation, growth and invasion of ameloblastoma.

Methods: The cells and xenograft of ameloblastoma were treated with MMP-2 inhibitor Ro31-9790 and the effects of Ro31-9790 on the cell proliferation and growth of ameloblastoma were observed. Primary culture in vitro, subcapsular kidney xenograft in vivo, MTT assay, flow cytometry, neoplastic volume measurement and histochemistry were employed to study the effects of cell proliferation and growth produced by Ro31-9790.

[Isolation and functional analysis of tobacco MARs].

Two new MAR segments (M14 and M17) were cloned from tobacco genome. Both of the sequences contained several typical consensus sequences of MARs, which were different from the original MAR sequence, such as 90%AT-box, A-box, T-box, the base unpairing regions (BUR), autonomously replicating sequences (ARS), the consensus sequence for topoisomerase II, MAR recognition sequence (MRS), origin of replication (ORI), curved DNA motifs and ATATTT et al. To investigate the effects of these two sequences on gene expression in transgenic plants, 3 plant expression vectors were constructed with uidA gene coding beta-glucuronidase (GUS) which were flanked on one side and on both sides by the MARs we obtained.

[Dynamic observation of lung metastasis model of adenoid cystic carcinoma].

Objective: To form ACC-M-GFP cells by transfecting pEGFP-1 into ACC-M cells, and to build up lung metastasis model of adenoid cystic carcinoma for dynamic observation in simulated lung environment.

Methods: pEGFP-1 was prepared and then transfected into ACC-M cell lines by using cationic lipid-based gene transfer technique. After successive selection, the ACC-M-GFP cells were collected and inoculated in BALB/C mice.

Distributions of charged hadrons associated with high transverse momentum particles in pp and Au+Au collisions at sqrt[sNN]=200 GeV.

Charged hadrons in [EQUATION: SEE TEXT] associated with particles of [EQUATION: SEE TEXT] are reconstructed in pp and Au+Au collisions at sqrt[sNN]=200 GeV. The associated multiplicity and p magnitude sum are found to increase from pp to central Au+Au collisions. The associated p distributions, while similar in shape on the nearside, are significantly softened on the awayside in central Au+Au relative to pp and not much harder than that of inclusive hadrons.

Multistrange Baryon elliptic flow in Au+Au collisions at square root of sNN=200 GeV.

We report on the first measurement of elliptic flow v2(pT) of multistrange baryons Xi- +Xi+ and Omega- + Omega+ in heavy-ion collisions. In minimum-bias Au+Au collisions at square root of s(NN)=200 GeV, a significant amount of elliptic flow, comparable to other nonstrange baryons, is observed for multistrange baryons which are expected to be particularly sensitive to the dynamics of the partonic stage of heavy-ion collisions. The pT dependence of v2 of the multistrange baryons confirms the number of constituent quark scaling previously observed for lighter hadrons.

Multiplicity and pseudorapidity distributions of photons in Au+Au collisions at square root of (S(NN)) = 62.4 GeV.

We present the first measurement of pseudorapidity distribution of photons in the region 2.3 < or = eta < or = 3.7 for different centralities in Au+Au collisions at square root of (S(NN)) = 62.

[An island pectoralis major myocutaneous flap for the reconstruction of tongue and floor of mouth].

Objective: To evaluate an island pectoralis major myocutaneous flap for immediate reconstruction of the total tongue body and the floor of the mouth after radical resection of bilateral tongue carcinoma involved.

Methods: Form October 2000 to December 2002, seven patients with bilateral tongue carcinoma were selected to treat with salvage surgery, and an island pectoralis major myocutaneous flap were applied for immediate reconstruction of total body of tongue and floor of mouth.

Results: Six flaps survived well.

[Interaction of vascular endothelial growth factor-C over-expression with tongue squamous cell carcinoma cell line Tca8113 with peri-carcinoma lymphatics].

Objective: To detect the role of Vascular endothelial growth factor C (VEGF-C) in the interaction of tongue squamous cell carcinoma (TSCC) with the peri-carcinoma lymphatics.

Methods: TSCC cells were implanted on the chorioallantoic membrane (CAM), in which, group A was transfected by plasmid pREP7 including VEGF-C, group B was transfected by plasmid pREP7, and group C was Tca8113. Lymphatic vessels were stained by 5'-Nase.

Open charm yields in d+Au collisions at squareroot[sNN]=200 GeV.

Midrapidity open charm spectra from direct reconstruction of D0(D0)-->K-/+pi+/- in d+Au collisions and indirect electron-positron measurements via charm semileptonic decays in p+p and d+Au collisions at squareroot[sNN]=200 GeV are reported. The D0(D0) spectrum covers a transverse momentum (pT) range of 0.1 View Article and Find Full Text PDF

Azimuthal anisotropy and correlations at large transverse momenta in p + p and Au + Au collisions at square root sNN=200 GeV.

Results on high transverse momentum charged particle emission with respect to the reaction plane are presented for Au + Au collisions at square root s(NN)=200 GeV. Two- and four-particle correlations results are presented as well as a comparison of azimuthal correlations in Au + Au collisions to those in p + p at the same energy. The elliptic anisotropy v(2) is found to reach its maximum at p(t) approximately 3 GeV/c, then decrease slowly and remain significant up to p(t) approximately 7-10 GeV/c.