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https://www.readbyqxmd.com/read/28098953/mesoporous-germanium-anode-materials-for-lithium-ion-battery-with-exceptional-cycling-stability-in-wide-temperature-range
#1
Sinho Choi, Yoon-Gyo Cho, Jieun Kim, Nam-Soon Choi, Hyun-Kon Song, Guoxiu Wang, Soojin Park
Porous structured materials have unique architectures and are promising for lithium-ion batteries to enhance performances. In particular, mesoporous materials have many advantages including a high surface area and large void spaces which can increase reactivity and accessibility of lithium ions. This study reports a synthesis of newly developed mesoporous germanium (Ge) particles prepared by a zincothermic reduction at a mild temperature for high performance lithium-ion batteries which can operate in a wide temperature range...
January 18, 2017: Small
https://www.readbyqxmd.com/read/28098909/biology-and-function-of-glypican-3-as-a-candidate-for-early-cancerous-transformation-of-hepatocytes-in-hepatocellular-carcinoma-review
#2
Mauro Montalbano, Jeremias Georgiadis, Ashlyn L Masterson, Joshua T McGuire, Janika Prajapati, Ali Shirafkan, Cristiana Rastellini, Luca Cicalese
Glypican-3 (GPC-3), a transmembrane heparan sulfate proteoglycan (HSPG), has recently been investigated as a player in tissue-dependent cellular signaling, specifically as a regulator of growth. Noteworthy, the regulatory protein has been implicated in both stimulatory and inhibitory pathways involving cell growth. Initially, GPC-3 was thought to act as a cell cycle regulator, as a loss-of-function mutation in the gene caused a hyper-proliferative state known as Simpson-Golabi-Behmel (SGB) overgrowth syndrome...
January 18, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28098895/microrna-133b-is-regulated-by-tap63-while-no-gene-mutation-is-present-in-colorectal-cancer
#3
Yifei Chen, Yi Zhang, Jianhuai He, Ying Fu, Changwei Lin, Xiaorong Li
Downregulation of miR-133b has been reported in multiple types of malignancies including colorectal cancer (CRC). We previously confirmed that TAp63 actively translates microRNA-133b (miR-133b) transcripts. While the presence of miRNA mutations have frequently been described in CRC, most CRCs do not show any variation in the miR‑133b coding sequence. Therefore, it is important to elucidate the relationship between TAp63 and miR-133b, and identify other mediators of miR-133b downregulation in CRC. The expression of TAp63 was detected by RT-qPCR, western blotting, immunohistochemistry (IHC) and densitometric analysis using Image-Pro Plus 6...
January 16, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28098833/role-of-electron-driven-proton-transfer-processes-in-the-ultrafast-deactivation-of-photoexcited-anionic-8-oxoguanine-adenine-and-8-oxoguanine-cytosine-base-pairs
#4
Xiuxiu Wu, Tolga N V Karsili, Wolfgang Domcke
It has been reported that 8-oxo-7,8-dihydro-guanosine (8-oxo-G), which is the main product of oxidative damage of DNA, can repair cyclobutane pyrimidine dimer (CPD) lesions when incorporated into DNA or RNA strands in proximity to such lesions. It has therefore been suggested that the 8-oxo-G nucleoside may have been a primordial precursor of present-day flavins in DNA or RNA repair. Because the electron transfer leading to the splitting of a thymine-thymine pair in a CPD lesion occurs in the photoexcited state, a reasonably long excited-state lifetime of 8-oxo-G is required...
January 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28098805/chemical-constituents-from-the-roots-and-rhizomes-of-asarum-heterotropoides-var-mandshuricum-and-the-in-vitro-anti-inflammatory-activity
#5
Yu Jing, Yi-Fan Zhang, Ming-Ying Shang, Guang-Xue Liu, Yao-Li Li, Xuan Wang, Shao-Qing Cai
Anti-inflammatory compounds were investigated from the ethanol extract of the roots and rhizomes of Asarum heterotropoides var. mandshuricum, a traditional Chinese medicine called Xixin and used for pain and inflammatory. Nine new compounds were isolated, including six new lignans, neoasarinin A-C (1-3), neoasarininoside A and B (4 and 5), and asarinin B (7), and one new monoterpene, asarincin A (8), two new amides, asaramid II and III (10 and 11), and one new natural monoterpene, asaricin B (9), along with 37 known compounds (6, 12-47)...
January 13, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28098505/facilitating-and-hindering-factors-for-coping-with-the-experience-of-having-a-child-with-cancer-a-lebanese-perspective
#6
Myrna A A Doumit, May Naifeh Khoury
BACKGROUND: Families with a child with cancer face significant emotional and psychosocial stressors. The frequency of childhood cancer is increasing in Lebanon with more than 282 children diagnosed each year. This condition is reported to evoke a range of challenging emotions for parents, yet no studies have been conducted on the facilitating and hindering factors that affect Lebanese parents coping with a child with cancer. OBJECTIVES: The purpose of the study was to gain an in-depth understanding of factors facilitating and hindering coping methods of Lebanese parents with a child with cancer...
January 18, 2017: Journal of Psychosocial Oncology
https://www.readbyqxmd.com/read/28098458/sequence-of-silicon-monolayer-structures-grown-on-a-ru-surface-from-a-herringbone-structure-to-silicene
#7
Li Huang, Yanfang Zhang, Yu-Yang Zhang, Wenyan Xu, Yande Que, En Li, Jinbo Pan, Yeliang Wang, Yunqi Liu, Shixuan Du, Sokrates T Pantelides, Hong-Jun Gao
Silicon-based two-dimensional (2D) materials are uniquely suited for integration in Si-based electronics. Silicene, an analog of graphene, was recently fabricated on several substrates and was used to make a field-effect transistor. Here, we report that, when Ru(0001) is used as a substrate, a range of distinct monolayer silicon structures forms, evolving towards silicene with increasing Si coverage. Low Si coverage produces a herringbone structure, a hitherto undiscovered 2D phase of silicon. With increasing Si coverage, herringbone elbows evolve into silicene-like honeycomb stripes under tension, resulting in a herringbone-honeycomb 2D superlattice...
January 18, 2017: Nano Letters
https://www.readbyqxmd.com/read/28098450/the-serum-amyloid-p-component-sap-interactome-in-human-plasma-containing-physiological-calcium-levels
#8
Ebbe Toftgaard Poulsen, Kata Wolff Pedersen, Anna Maria Marzeda, Jan Johannes Enghild
The pentraxin serum amyloid p component (SAP) is secreted by the liver and found in plasma at a concentration of approximately 30 mg/L. SAP is a 25 kDa homo-pentamer known to bind both protein and non-protein ligands, all in a calcium-dependent manner. The function of SAP is unclear, but likely involves the humoral innate immune system spanning the complement system, inflammation, and coagulation. Also, SAP is known to binding to the generic structure of amyloid deposits and possibly to protect these against proteolysis...
January 18, 2017: Biochemistry
https://www.readbyqxmd.com/read/28098422/structural-elucidation-of-a-non-peptidic-inhibitor-specific-for-the-human-immunoproteasome
#9
Haissi Cui, Regina Baur, Camille Le Chapelain, Christian Dubiella, Wolfgang Heinemeyer, Eva Maria Huber, Michael Groll
Selective inhibition of the immunoproteasome is a promising approach towards the development of immunomodulatory drugs. Recently, a class of substituted thiazole compounds that combine a non-peptidic scaffold with the absence of an electrophile has been reported in a patent. Herein, we describe the mode of action of the lead compound using a sophisticated chimeric yeast model of the human immunoproteasome for structural studies. The inhibitor adopts a unique orientation perpendicular to the β5i substrate binding channel...
January 18, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28098323/two-dimensional-melting-of-colloids-with-long-range-attractive-interactions
#10
Di Du, Manolis Doxastakis, Elaa Hilou, Sibani Lisa Biswal
The solid-liquid melting transition in a two-dimensional (2-D) attractive colloidal system is visualized using superparamagnetic colloids that interact through a long-range isotropic attractive interaction potential, which is induced using a high-frequency rotating magnetic field. Various experiments, supported by Monte Carlo simulations, are carried out over a range of interaction potentials and densities to determine structure factors, Lindermann parameters, and translational and orientational order parameters...
January 18, 2017: Soft Matter
https://www.readbyqxmd.com/read/28098286/tridentate-lewis-acids-based-on-triphenylsilane
#11
Janek Tomaschautzky, Beate Neumann, Hans-Georg Stammler, Andreas Mix, Norbert W Mitzel
Several derivatives of the propeller-shaped ortho-substituted triphenylsilanes, carrying metal- or silicon-based acceptor groups, are reported. They were synthesized starting from tris(2-bromophenyl)fluorosilane, tris(2-vinylphenyl)fluorosilane and tris(2-ethynylphenyl)fluorosilane to generate a scope of Lewis-acidic molecules with different cavities. An improved synthetic protocol for donor-free tris(2-lithiophenyl)silanes is described. First attempts in host-guest chemistry to probe the binding between a threefold alane-functionalised ortho-substituted triphenylsilane and a tridentate Lewis-basic guest molecule are presented...
January 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28098285/kb-po4-f-a-novel-acentric-deep-ultraviolet-material
#12
Ji-Hong Jiang, Lin-Chuan Zhang, Ya-Xi Huang, Zhi-Mei Sun, Yuanming Pan, Jin-Xiao Mi
Two challenges to grow KBe2BO3F2 (KBBF), the best known deep-ultraviolet nonlinear optical (NLO) material to date, are the limited crystal sizes and the use of a highly toxic element (Be). Herein we report on the discovery of a novel anhydrous non-centrosymmetric alkali fluorinated borophosphate KB(PO4)F (KBPF) featuring a cut-off wavelength of less than 200 nm and a large second-harmonic generation (SHG) effect similar to KH2PO4 (KDP), hence representing a new promising deep-ultraviolet NLO material. The KBPF crystals consisting of common elements can be grown using green and cost effective processes and do not show any detectable hygroscopicity...
January 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28098282/b40-cluster-stability-reactivity-and-its-planar-structural-precursor
#13
Yang Yang, Zhuhua Zhang, Evgeni S Penev, Boris I Yakobson
We report a comprehensive first-principles study of the structural and chemical properties of the recently discovered B40 cage. It is found to be highly reactive and can exothermically dimerize, regardless of the orientation, by overcoming a small energy barrier ≃0.06 eV. The energy gap of the system varies widely with the aggregation of the increasing number of B40 cages, from 3.14 eV in a single B40, to 1.54 eV in the dimer, to 1.25 eV in the trimer. We also explore a recipe for protecting the B40 cage by sheathing it within a carbon shell and identify carbon nanotubes with a radius of ∼6 Å as optimal hosts for an isolated cage...
January 18, 2017: Nanoscale
https://www.readbyqxmd.com/read/28098260/hepatitis-b-virus-x-protein-is-capable-of-down-regulating-protein-level-of-host-antiviral-protein-apobec3g
#14
Ruidong Chen, Xue Zhao, Yongxiang Wang, Youhua Xie, Jing Liu
The apolipoprotein B mRNA editing catalytic polypeptide-like (APOBEC) family proteins bind RNA and single-stranded DNA, and create C-to-U base modifications through cytidine deaminase activity. APOBEC3G restricts human immunodeficiency virus 1 (HIV-1) infection by creating hypermutations in proviral DNA, while HIV-1-encoded vif protein antagonizes such restriction by targeting APOBEC3G for degradation. APOBEC3G also inhibits hepatitis B virus (HBV): APOBEC3G co-expression inhibits HBV replication and evidences exist indicating APOBEC3G-mediated HBV hypermutations in patients...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098237/controllable-synthesis-of-tio2-fe2o3-core-shell-nanotube-arrays-with-double-wall-coating-as-superb-lithium-ion-battery-anodes
#15
Yan Zhong, Yifan Ma, Qiubo Guo, Jiaqi Liu, Yadong Wang, Mei Yang, Hui Xia
Highlighted by the safe operation and stable performances, titanium oxides (TiO2) are deemed as promising candidates for next generation lithium-ion batteries (LIBs). However, the pervasively low capacity is casting shadow on desirable electrochemical behaviors and obscuring their practical applications. In this work, we reported a unique template-assisted and two-step atomic layer deposition (ALD) method to achieve TiO2@Fe2O3 core-shell nanotube arrays with hollow interior and double-wall coating. The as-prepared architecture combines both merits of the high specific capacity of Fe2O3 and structural stability of TiO2 backbone...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098232/crystal-structure-of-sec10-a-subunit-of-the-exocyst-complex
#16
Jianxing Chen, Atsushi Yamagata, Keiko Kubota, Yusuke Sato, Sakurako Goto-Ito, Shuya Fukai
The exocyst complex is a heterooctameric protein complex composed of Sec3, Sec5, Sec6, Sec8, Sec10, Sec15, Exo70 and Exo84. This complex plays an essential role in trafficking secretory vesicles to the plasma membrane through its interaction with phosphatidylinositol 4,5-bisphosphate and small GTPases. To date, the near-full-length structural information of each subunit has been limited to Exo70, although the C-terminal half structures of Sec6, Sec15 and Exo84 and the structures of the small GTPase-binding domains of Sec3, Sec5 and Exo84 have been reported...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098230/molecular-mechanism-of-the-allosteric-regulation-of-the-%C3%AE-%C3%AE-heterodimer-of-human-nad-dependent-isocitrate-dehydrogenase
#17
Tengfei Ma, Yingjie Peng, Wei Huang, Jianping Ding
Human NAD-dependent isocitrate dehydrogenase catalyzes the decarboxylation of isocitrate (ICT) into α-ketoglutarate in the Krebs cycle. It exists as the α2βγ heterotetramer composed of the αβ and αγ heterodimers. Previously, we have demonstrated biochemically that the α2βγ heterotetramer and αγ heterodimer can be allosterically activated by citrate (CIT) and ADP. In this work, we report the crystal structures of the αγ heterodimer with the γ subunit bound without or with different activators...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098216/chemical-bonding-in-aqueous-hexacyano-cobaltate-from-photon-and-electron-detection-perspectives
#18
Sreeju Sreekantan Nair Lalithambika, Kaan Atak, Robert Seidel, Antje Neubauer, Tim Brandenburg, Jie Xiao, Bernd Winter, Emad F Aziz
The electronic structure of the [Co(CN)6](3-) complex dissolved in water is studied using X-ray spectroscopy techniques. By combining electron and photon detection methods from the solutions ionized or excited by soft X-rays we experimentally identify chemical bonding between the metal center and the CN ligand. Non-resonant photoelectron spectroscopy provides solute electron binding energies, and nitrogen 1 s and cobalt 2p resonant core-level photoelectron spectroscopy identifies overlap between metal and ligand orbitals...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098213/tunable-diffraction-free-array-in-nonlinear-photonic-crystal
#19
Dongmei Liu, Dunzhao Wei, Yong Zhang, Zhenhua Chen, Rui Ni, Bo Yang, Xiaopeng Hu, Y Q Qin, S N Zhu, Min Xiao
Diffraction-free beams have attracted increasing research interests because of their unique performances and broad applications in various fields. Although many methods have been developed to produce such beams, it is still challenging to realize a tunable non-diffracting beam. Here, we report the generation of a tunable diffraction-free array through second-harmonic generation in a nonlinear photonic crystal, i.e., a 2D periodically-poled LiTaO3 crystal. In such a crystal, the second-harmonic wave is engineered by properly designing the domain structure based on the Huygens-Fresnel principle...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098209/crystal-growth-of-dirac-semimetal-zrsis-with-high-magnetoresistance-and-mobility
#20
Raman Sankar, G Peramaiyan, I Panneer Muthuselvam, Christopher J Butler, Klauss Dimitri, Madhab Neupane, G Narsinga Rao, M-T Lin, F C Chou
High quality single crystal ZrSiS as a theoretically predicted Dirac semimetal has been grown successfully using a vapor phase transport method. The single crystals of tetragonal structure are easy to cleave into perfect square-shaped pieces due to the van der Waals bonding between the sulfur atoms of the quintuple layers. Physical property measurement results including resistivity, Hall coefficient (RH), and specific heat are reported. The transport and thermodynamic properties suggest a Fermi liquid behavior with two Fermi pockets at low temperatures...
January 18, 2017: Scientific Reports
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