[en] Forward particle production and correlation measurements at RHIC can probe low-x gluons. The suppression observed in back-to-back forward π⁰+forwardπ⁰ correlations at STAR in central d + Au collisions at STAR is consistent with a prediction of the Color Glass Condensate (CGC) calculation, indicating the gold nucleus probed at such low-x is in a dense gluon state. The forward π⁰+near-forward jet-like cluster azimuthal correlations in 200 GeV p + p and d + Au collisions at STAR are studied, which are sensitive to the intermediate x region between forward+mid-rapidity correlations and forward + forward correlations. Together with the other measurements from STAR, which probe different regions of x, forward + near-forward di-hadron correlations can provide information to understand how sharp is the transition from dilute parton gas to dense gluon state

[en] Acute abdomen means a set of clinical emergency with acute abdominalgia as the primary characteristic symptom of onset, including others as the acute onset, quick symptom changes, severe illness, and oftenly need surgical treatment; therefore, acute abdomen ought to be designated within surgery domain. As interventional therapy is extensively applied in clinical medicine, now a days many victims of acute abdomen, especially those with ambiguous clinical diagnosis requiring an initial invasive examination (angiography, PTC, etc), should be referred to interventional therapy before taking an item of invasive measures. This new concept management has achieved good clinical curative effect and become one of the remarkable achievements in acute abdomen therapeutics. Such predominance finds proper expression in the following two aspects: (1) The evolution of contemporary medical iconography has made it possible to duly and accurately diagnose acute abdomen, and thus created a diagnostic predominance for us-interventionalists; (2) Intervention therapy is featured with its unique minimal invasion and massive effectiveness, and thus provides high leading edge than conventional surgical operation. The authors believe that intervention management ought to become the first-choice for treating the above mentioned acute abdomen. (authors)

[en] The heavy flavor studies at RHIC help improve the knowledge of the bottom/charm quark production and can test Quantum Chromodynamics (QCD). Compared to the LHC/Tevatron, the RHIC heavy flavor production originates from different partonic sub-processes and has a complementary kinematic coverage. The PHENIX forward rapidity silicon vertex detector (FVTX) provides precise determination of the event vertex, tracking and the Distance of Closest Approach (DCA) of charged tracks. This detector allows direct access to the B meson production via measurements of non-prompt J/ψ→μ⁺+μ^- within 1.2<|y|<2.2 rapidity in p+p collisions at √s= 510 and 200 GeV. Comparison among PHENIX measurements of the B→J/ψ fraction with integrated J/ψ p_T up to 5 GeV/c and higher energy results at the Tevatron and the LHC presents a smooth center of mass energy dependence from 0.2 to 13 TeV in p+p (p+$\stackrel{¯<!--\; ??\; -->}{p}$) collisions. The Next-To-Leading order Perturbative QCD (NLO pQCD) calculations are in reasonable agreement with the extracted total $b\stackrel{¯<!--\; ??\; -->}{b}$ cross section based on the B→J/ψ fraction measurements at PHENIX.

[en] This paper presents a method, through which the pth moment stability of a linear multiplicative stochastic system, that is a linear part of a co-dimension two-bifurcation system upon a three-dimensional center manifold and is subjected to a parametric excitation by an ergodic real noise, is obtained. The excitation included is assumed to be an integrable function of an n-dimensional Ornstein–Uhlenbeck vector process that is the output of a linear filter system and both the strong mixing condition, which is the sufficient condition for the stochastic averaging method, and the delicate balance condition are removed in the present study. By using a perturbation method and the spectrum representations of both the Fokker Planck operator and its adjoint one of the linear filter system, the asymptotic expressions of the moment Lyapunov exponent are obtained, which match the numerical results well

[en] Objective: To evaluate the effects of selective mesenteric angiography with continuous papaverine perfusion for the diagnosis and treatment of non-occlusive mesenteric ischemia (NOMI). Methods: Eighteen patients with NOMI underwent selective superior mesenteric arteriography and papaverine perfusion via the SMA simultaneously were analyzed retrospectively. Results: Fifteen out of the 18 cases recovered; 2 cases underwent laparotomy; 1 case died within 10 days. Conclusion: Selective superior mesenteric arteriography with continuous papaverine perfusion is an effective diagnostic and therapeutic method for nonocclusive mesenteric ischemia. (authors)

[en] Polylysine (PLL) coated iron oxide nanoparticles (SPIONs) have potential in biomedical application. In the present work PEG coated SPIONs (PEG-SPIONs) with the particle size of 9.4±1.4 nm were synthesized by thermal decomposition of Fe(acac)₃ in PEG, and then coated with PLL (PLL/PEG-SPIONs). The PEG-SPIONs and PLL/PEG-SPIONs were superparamagnetic with the saturation magnetization of 53 and 44 emu/g, respectively. The hydrodynamic diameter of PEG-SPIONs in deionized water was 18.8 nm, which increased to 21.3−28.2 nm after mixing with different amount of PLL. The zeta potentials of PLL/PEG-SPIONs were −8.9 − −3.4 mV which were changing with time. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses indicated that PLL was attached to the PEG-SPIONs. - Highlights: ●Hydrophilic PEG-SPIONs were synthesized by a thermal decomposition approach. ●The PEG-SPIONs were successfully coated with PLL. ●PEG-SPIONs and PLL/PEG-SPIONs have small hydrodynamic sizes. ●Both PEG-SPIONs and PLL/PEG-SPIONs showed superparamagnetic behavior at 300 K

[en] Forward di-jet production in d+Au collisions at RHIC provides sensitivity to Bjorken-x between 0.001 and 0.02 for the nuclear gluon density. The STAR experiment at RHIC has continuous azimuthal coverage with electromagnetic calorimeters for pseudo-rapidity from-1 to 4. We have measured forward+mid-rapidity π⁰ - π⁰ and π⁰ - h azimuthal correlations and forward+forward rapidity π⁰ - π⁰ azimuthal correlations. Both analyses use the Forward Meson Spectrometer (FMS) triggered data in RHIC 2008 run p+p and d+Au collisions at √S_NN = 200 GeV. The end-cap electromagnetic calorimeter (EEMC) at STAR covers pseudo-rapidity from 1.07 to 2. This provides us sensitivity to the nuclear gluon density at intermediate x values. Preliminary results on the π⁰ - π⁰ and π⁰ + jet-like azimuthal correlations with both the FMS and the EEMC will be discussed.

[en] Objective: To determine the value of MRI for diagnosing the posterior meniscus root tear. Methods: MR examinations of 30 patients with tear of the posterior meniscus root confirmed by knee arthroscopies were retrospectively reviewed. Of the 30 patients, 17 with posterior medial meniscus root tear (MMRT) and 13 with posterior lateral meniscus root tear (LMRT). The diagnostic sensitivity of' MRI for the posterior meniscus root tear was analyzed. Fisher's exact test was used to compare the detection rate of MRI for MMRT with that for LMRT. Results: All 17 cases with MMRT and 9 cases out of 13 with LMRT were correctly diagnosed by MRI and the diagnostic sensitivity of MRI for the posterior meniscus root tear was 86.7% (26/30). The main MR appearance of the posterior meniscus root tear was distortion of the meniscal root, with its low signal replaced by abnormal high signal. The detection rate of MRI for MMRT (17/17) was significantly greater than that for LMRT (9/13) (P=0.026). The prevalence of MMRT associated with meniscus extrusion (15/17) was significantly greater than that of LMRT (6/13) (P=0.020), but the prevalence of MMRT associated with anterior cruciate ligament (ACL) injury (5/17) was significantly lower than that of LMRT (11/13) (P=0.004). Conclusion: MRI is a relatively good method for detection of posterior meniscus root tears and associated injuries. (authors)

[en] Objective: To determine the feasibility of tissue T₂ measurement with turbo spin echo (TSE) sequence as an alternative method for a standard multi-echo spin echo sequence (MSE), and to evaluate the feasibility of single-slice and multi-slice acquisition for quantitative assessment of T₂ relaxation time. Methods: (1) The phantom consisted of 8 small plastic bottles of phosphate buffer saline doped with known amounts of Gd-DTPA (Magnevist) to prepare solutions with different T₂ times. T₂ values measured using a TSE sequence were experimentally assessed against a gold-standard MSE protocol to evaluate the feasibility of single-slice and multi-slice acquisition for quantitative assessment of T₂ relaxation time. (2) The consistency of T₂ values obtained by MSE and TSE sequence in six cases of in vivo knee joint measurement was compared. Results: (1) Apart from phosphate buffer saline (T₂ value was around 2000 ms), the discrepancy in T₂ values was less than 10% from phantom experiments between TSE (89.9±3.0)-(1228.0±128.0) ms and the conventional MSE technique (89.6±1.0)-(1221.0± 18.0) ms. The standard deviation in measured T₂ was increased for TSE sequence than for MSE sequence. (2) For tissues with T₂ value less than 1000 ms, the discrepancy in T₂ values was less than 10% from phantom experiments between single-slice (89.9±3.0)-(930.0±71.0) ms and multi-slice acquisition (85.8±5.0)-(902.7±354) ms for quantitative assessment of T₂ relaxation time. For tissues with T₂ value more than 1000 ms and around 600 ms, the discrepancy in measured T₂ was increased (>10%). (3) In vivo knee joint measurement, T₂ values of the other tissues apart from yellow bone marrow obtained by the MSE, single-slice and multi-slice TSE sequence (51.5±15.4)-(476.5±69.7) ms yielded a delicate consistency (ICC>0.75). Conclusions: The method of single-slice and multi-slice TSE sequence in T₂ measurement is feasible. For bone marrow and extremely long T₂ tissue (for instance, cerebrospinal fluid), however, there may be considerable discrepancy on T₂ values obtained by TSE sequence. (authors)

[en] Objective: To evaluate the effects of percutaneous transhepatic variceal obliteration in the treatment of acute bleeding from gastroesophageal varices in patients with severe cirrhosis. Methods: 19 patients with Child C cirrhosis suffered from active bleeding from gastroesophageal varices. Emergency procedures of percutaneous transhepatic variceal obliteration were performed in all 19 patients. Results: Successful catheterization and obliteration of the varices in all of the 19 cases. Active bleeding were controlled in 18 cases with only one failure and TIPSS was performed. During a follow-up period ranging from one to 12 months, 14 cases bled recurrently during 3 to 12 months. 15 cases died within the follow-up period. 4 cases were alive. Severe complication of intraperitoneal bleeding occurred in 1 case, and laparotomy was performed. Conclusions: Percutaneous transhepatic variceal obliteration is effective in controlling acute bleeding from gastroesophageal varices in patients with Chile C cirrhosis. It could be used as the first choice treatment method for emergency when TIPSS is contraindicated