Search

Peritoneal lymphomatosis is extremely rare and associated with poor prognosis. Most practitioners only pay more attention to peritoneal carcinomatosis. However, peritoneal lymphomatosis can be neglected and misdiagnosed. We report a teenager with 10 days of abdominal distension and pain accompanied by computed tomography scan suggesting diffuse thickening of the peritoneum and omentum and abdominopelvic effusion. Tuberculous peritonitis and peritoneal carcinomatosis were initially suspected. However, it was finally confirmed as non-Hodgkin’s B-cell lymphoma by omentum biopsies. He achieved complete remission after chemotherapy and autologous stem cell transplantation. But unfortunately, he suffered a relapse and died 10 months after diagnosis. Following a review of the literature, it can be concluded that the discovery of lymphomatosis in peritoneum is a rare finding. Lymphoma should be considered in the differential diagnosis of unexplained peritoneal thickening on computed tomography, and this case emphasizes the importance of early pathological diagnosis to make sure that the right treatment can be started opportunely.

SiCw-SiC foams with hollow skeleton were synthesized by a simple procedure that consisted of the chemical vapor infiltration (CVI) and oxidation process. Flexible carbon foam was employed as CVI template. A typical structure of SiCw-SiC foams consisting of SiC supporter with hollow skeleton structure accompanying numerous crooked SiC whiskers was obtained after burning out carbon skeleton of the carbon foam during oxidation process. SiCw-SiC foams have a density of 0.11 ≤ ρ ≤ 0.12 g/cm3, porosity ≥ 96% and a thermal conductivity at room temperature between 0.040 and 0.075 W/m·K. Thermal conductivity of the SiCw-SiC foams moderately increased with elevation of temperature, indicating that these foams with larger amount of whiskers exhibit excellent thermal insulation property at elevated temperature.

An improved sandwich structured composite with low thermal conductivity used in high temperature is discussed, which have a great potential to be used in thermal protection system. This composite was composed of compound core material and C/SiC laminates. It is crucially noted that the compound core material is composed of reticulated SiC foam and SiO 2 powders. In this paper, the thermal conductivity of compound core was much lower than that of unfilled SiC foam in high temperature. It was also observed that the thermal conductivities of compound cores with the density ranged from 1.23 to 1.38 g/cm 3 increased accordingly. A mathematical relation was derived to calculate the theoretical effective thermal conductivity of sandwich structured composite, and the results agreed with the measured data with an error of 5%.

This paper describes the preparation of ultralight flexible carbon foam (FCF) by direct carbonization of commercial melamine foam (MF). The effect of carbonization temperature on microstructure characteristics and thermal properties in FCF were evaluated. The thermal conductivity of the samples at ambient temperature was measured using the heat flow tester and the thermal conductivity of the samples at various temperatures was measured using water flow plate method. The pore distribution and microstructure morphology of the MF sample and FCF samples were also measured by mercury intrusion porosimetry and SEM imaging, respectively. The results show that the 3D network architecture and the triangle fiber shape of the MF precursor were inherited by the resulting FCF samples despite of a great reduction in volume. The average pore diameter of FCF samples reaches a lowest value for carbonization temperature of 850 °C. The thermal conductivity of FCF samples is considered to be affected by the porosity characteristic of FCF samples. The higher pore diameter of FCF samples, the greater its thermal conductivity.

Mono-wave-piercing boats adopt a tumblehome and wave-piercing design which is becoming popular among military vessels and yachts. Published studies on mono-wave-piercing boats mostly focused on motions and stability in waves, or were conducted at low speed. A new high speed mono-wave-piercing boat is developed in this study and model tests have been finished in order to reveal more sailing characters of mono-wave-piercing boats. Special attention is paid to the sailing characters of mono-wave-piercing boats at speed. Model tests include resistance tests in calm water and seakeeping performance tests in regular waves. Available model test results give an insight in the way how the mono-wave-piercing boat runs in calm water and regular waves at speed and are valuable reference for similar and derived design.

With regard to the adiabatic principle for insulation, a new-type high-temperature vacuum insulation composite (HTVIC) was put forward as structural thermal protection system. This new structure consisted of graphite felt core material and sealing layer was prepared by Chemical Vapor Infiltration (CVI) pyrolytic carbon (PyC), CVI SiC and silicasol-infiltration-sintering (SIS) process with composite density as low as 0.306 g/cm3. In this paper, a mathematical relation was also derived to calculate the theoretical effective thermal conductivity of HTVIC, whose results agreed with the measured data with the error of

With regard to the adiabatic principle of insulation, a novel multilayer cladding structure composites (MCSC) with vacuum inside was put forward, which could be used in high temperature insulation field. In the composites, SiO2 was used to fill the microcracks and protect the carbon matrix from oxidizing. This novel material was composed of two parts, one was the core material consisted of SiC foam ceramic, the other was the flawless outer shell consisted of carbon fiber reinforced composites with vacuum inside that produced by Chemical Vapor Infiltration (CVI) Pyrolytic Carbon (PyC) and silicasol-infiltration–sintering methods. Material density was 0.81 g/cm3. The effective thermal conductivity of MCSC ranged from 0.193 W/m · K to 0.721 W/m · K within the temperature from 303 K to 703 K, which was 13.5–23.3% lower than the value of SiC ceramic foam core materials. However, at 1473 K, the measured data of MCSC and SiC foam were 1.815 W/m · K and 1.911 W/m · K, respectively. It was only 5.02% lower than that of SiC foam. Keywords: Thermal insulation, Vacuum, Ceramic foam, Sealing layer

Eu 2+ and Dy 3+ codoped (Ca,Sr) 7 (SiO 3 ) 6 Cl 2 yellow phosphors were successfully synthesized by self-flux method. The structure, morphology and photoluminescence properties were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectra. The as-prepared phosphor showed a broad emission spectrum centered at 550 nm for Eu 2+ single-doped phosphor, while located at 548–544 nm for the Eu 2+ , Dy 3+ codoped samples under excitation at 380 nm light. The emission intensity was greatly improved when Dy 3+ was doped into the (Ca,Sr) 7 (SiO 3 ) 6 Cl 2 :Eu 2+ system. The composition-optimized sample with 3 mol.% of Dy 3+ and constant 10 mol.% of Eu 2+ exhibited a 220% PL enhancement compared to the phosphor with 10 mol.% Eu 2+ single-doped. Meanwhile, it was found that the quantum efficiency of phosphor namely (Ca,Sr) 7 (SiO 3 ) 6 Cl 2 :3 mol.% Dy 3+ , 10 mol.% Eu 2+ could get up to 24.6%. The synthesized yellow-emitting (Ca,Sr) 7 (SiO 3 ) 6 Cl 2 :Dy 3+ ,Eu 2+ is a promising candidate as high-efficiency yellow phosphor for NUV-excited white LEDs.

Pathological status of lymph nodes (LNs) plays a critical role in staging and treatment for the patients with breast cancer. Sentinel lymph node biopsy has become the standard method in determining pathological status of axillary LNs. Therefore, the determination of sentinel lymph nodes (SLNs) and therapy of metastatic LNs are highly desirable in clinic. Herein, an unprecedented carbon nanoparticles (CNs)-incorporated liquid-gas phase-transition nanodroplets (CNPs) with strong near-infrared (NIR) absorption, good biocompatibility, excellent photoacoustic (PA) and ultrasound (US) contrast, and high photothermal-conversion efficiency are reported in this study. Upon laser irradiation, liquid-gas phase transition of the CNPs has been demonstrated to provide excellent contrasts for PA/US dual-modality imaging both in vitro and in vivo. Additionally, the CNPs are capable of staining lymph nodes, which can contribute significantly to the identification of LNs with naked eyes. With increased laser energy, the CNPs exhibit the high performance in killing the breast cancer cells both in vitro and in vivo, due to the photothermal effect induced from the CNs within CNPs. These results suggest that the developed multifunctional phase-transition nanodroplets have high potential to act as the theranostic agents in both SLNs detection and therapy of metastatic LNs.

p53 is one of the most widely investigated molecular markers in bladder cancer and its polymorphisms have been related to individual cancer risks. The objective of this study was to explore the association of p53 codon 72 polymorphism with susceptibility and clinicopathologic characteristics of bladder cancer in a Chinese population.We investigated the impact of p53 codon 72 polymorphism in a hospital-based case-control study of bladder cancer. We tested peripheral blood samples from 120 patients with bladder cancer and 120 healthy individuals of similar age and from the same geographical region. The polymorphisms were analyzed using polymerase chain reaction-restriction fragment length polymorphism assay.There was an association between smoking status and bladder cancer (odds ratio [OR] = 2.25; 95% confidence interval [95% CI] = 1.31, 3.87; p = 0.003). Patients with bladder cancer had a significantly lower frequency of Arg/Arg (OR = 0.53; 95% CI = 0.31, 0.89; p = 0.02) and Arg allele (OR = 0.66; 95% CI = 0.45, 0.95; p = 0.03) than controls. Patients with invasive bladder cancer had a significantly lower frequency of Arg/Arg (OR = 0.29; 95% CI = 0.10, 0.88; p = 0.03) than those with superficial bladder cancer. When stratifying by the grade and histological type of bladder cancer, we found no statistical association.These data suggest that the p53 codon 72 Arg/Arg genotype and Arg allele are associated with a lower risk of bladder cancer in Chinese population.

A novel high temperature vacuum insulated composite with low thermal conductivity composed of SiC foam core material and sealing outer shell is discussed, which will have a great potential to be used as thermal protection system material. In this composite, the outer shell is the key to maintain its internal vacuum, which is consisted of 2.5D C/C and SiC coating. So the densification processes of outer shell, including 2.5D braiding process, chemical vapor infiltration (CVI) pyrolytic carbon (PyC) process, polymer infiltration and pyrolysis (PIP) glassy carbon (GC) process and chemical vapor deposition (CVD) SiC process, are focused in this paper. The measuring result of the gas transmission quantity of outer shell is only 0.14 cm3/m2 d Pa after 5 times CVD processes, which is two order of magnitude lower than that sample deposited one time. After 10 times thermal shock cycles, the gas transmission quantity increases to 1.2 cm3/m2 d Pa. The effective thermal conductivity of high temperature vacuum insulated composite ranged from 0.19 W m−1 K−1 to 0.747 W m−1 K−1 within the temperature from 20 °C to 900 °C. Even after 10 thermal shock cycles, the variation of the effective thermal conductivity is still consistent with that without treatments.