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C18H19N3O5, orthorhombic, Pna21 (no. 33), a = 15.5675(12) Å, b = 17.0299(13) Å, c = 6.2644(5) Å, V = 1660.8(2) Å3, Z = 4, Rgt(F) = 0.0322, wRref(F2) = 0.0815, T = 296 K.

Nanosized FeNi particles were loaded along multiwalled carbon nanotubes (MWCNT) to achieve high performance to attenuate electromagnetic (EM) waves of 2-18GHz and power frequency (50Hz). The MWCNT/Ni was produced through the electroless plating method, then followed by a polyol approach to produce MWCNT/FeNi composite nanowires. The microstructure of MWCNT/FeNi composite nanowires was characterized by transmission electron microscopy, scanning electron microscope, X-ray diffraction and vector network analysis. The results show that the multi-component structure endows MWCNT/FeNi composite nanowires with effective EM absorption band (RL

The research of liver metastasis is a developing field. The ability of tumor cells to invade the liver depends on the complicated interactions between metastatic cells and local subpopulations in the liver (including Kupffer cells, hepatic stellate cells, liver sinusoidal endothelial cells, and immune‐related cells). These interactions are mainly mediated by intercellular adhesion and the release of cytokines. Cell populations in the liver microenvironment can play a dual role in the progression of liver metastasis through different mechanisms. At the same time, we can see the participation of liver parenchymal cells and nonparenchymal cells in the process of liver metastasis of different tumors. Therefore, the purpose of this article is to summarize the relationship between cellular components of liver microenvironment and metastasis and emphasize the importance of different cells in the occurrence or potential regression of liver metastasis. Significance statement: In this work, we summarized the role of different cells in the liver microenvironment in liver metastasis of digestive system tumors. Different resident cells and recruitment cells in the liver can play a dual role in the process of metastasis. The balance of these effects ultimately determines whether tumor cells proliferate, colonize in new sites, enter dormancy, or even die. This review summarizes the different mechanisms of these cells, thus providing some possible therapeutic targets for the occurrence of liver metastasis of digestive system tumors. [ABSTRACT FROM AUTHOR]

The microstructure,martensite/austenite(M/A) islands,precipitated phases,high-angle grain boundaries and effective grain size of hot rolled and tempered low carbon bainitic steel AH80 DB were studied by scanning electron microscopy(SEM),transmission electron microscopy(TEM) and electron back-scattered diffraction(EBSD). The reason for the improvement in impact toughness of the low carbon bainitic steel after tempering was discovered. The results show that the microstructures of both the samples mainly consist of lath bainite,granular bainite and acicular ferrite. There is more acicular ferrite in the tempered steel. Coarse M/A islands are found in the hot rolled steel and its distribution is directional,the ratio of large-angle grain boundaries is 17.33%,and the average effective grain size is 3.57 μm. Nevertheless,the size of M/A islands decreases after tempering. Besides,the ratio of largeangle grain boundaries increases by 3.43% and the average effective grain size decreases by 0.56 μm after tempering. The precipitated phase of the hot rolled steel is(Nb,Ti) C with the size of 50-150 nm,while much small and spherical precipitates with the size of about 10 nm appear after tempering.

Described herein is the enantioselective synthesis of Hantzsch‐type 1,4‐dihydropyridines (DHPs), which are frequently contained in pharmaceuticals. Readily available symmetrical 1,4‐DHPs were used as substrates, and the methyl group at the 2‐ or 6‐position of the 1,4‐DHP was selectively monobrominated by desymmetrizing enantioselective bromination. The inert C−H bond was converted into a versatile C−Br bond, which guaranteed the modification of the chiral 1,4‐DHP derivatives with high efficiency. Furthermore, axially chiral 4‐aryl pyridines were accessible by central‐to‐axial chirality conversion. [ABSTRACT FROM AUTHOR]

The foaming behaviors of a semicrystalline poly(butylenes succinate) (PBS) and its blends with an amorphous semiaromatic nylon poly(hexamethylene (iso‐co‐tere)phthalamide) (PA6IcoT) assisted by supercritical CO2 (scCO2) as blowing agent at 110–130 °C and 16–24 MPa are investigated. The results show that the average cell diameter and cell density of the pure PBS foam obtained at 24 MPa and 120 °C are 46 μm and 1.6 × 107 cells cm−3, respectively. The cell coalescence is prevented and heterogeneous nucleation is induced in the presence of PA6IcoT in the physical blends (mPBS), resulting smaller cell size as 12 μm and higher cell density as 1.6 × 109 cells cm−3 in the foams at 24 MPa and 120 °C. The reactive blends (rPBS) with PA6IcoT prepared by 2,2‐(1,3‐benzene)bis(2‐oxazoline) (PBO) as chain extender are promising for higher complex viscosity and lower crystallinity, resulting in higher melt strength and better foamability. The rPBS foams with cell size as small as 8 μm and cell density as high as 2.0 × 109 cells cm−3 are obtained at 24 MPa and 120 °C. [ABSTRACT FROM AUTHOR]