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https://www.readbyqxmd.com/read/29345913/non-centrosymmetric-rbnamgp2o7-with-unprecedented-thermo-induced-enhancement-of-second-harmonic-generation
#1
Sangen Zhao, Xiaoyan Yang, Yi Yang, Xiaojun Kuang, Fengqi Lu, Pai Shan, Zhihua Sun, Zheshuai Lin, Maochun Hong, Junhua Luo
It is of great difficulty to obtain deep-UV transparent materials with enhanced second harmonic generation (SHG), mainly limited by the theoretically poor transparency of these materials in the deep-UV spectral region. Here we report a new non-centrosymmetric, deep-UV transparent phosphate RbNaMgP2O7, which undergoes a thermo-induced reversible phase transition (at a high temperature of 723 K) and correspondingly an evident SHG enhancement up to ~1.5 times. The phase transition is aroused by the twist of [P2O7]4- dimers with deviation from the P-O-P equilibrium positions...
January 18, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29344648/effect-of-midkine-on-gemcitabine-resistance-in-biliary-tract-cancer
#2
Yongliang Lu, Bing Yan, Huihui Guo, Li Qiu, Xinrong Sun, Xiang Wang, Qian Shi, Ying Bao
Gemcitabine‑based chemotherapy is one of the most effective and commonly used chemotherapeutic regimens for biliary tract cancer (BTC). However, development of resistance to this drug limits its efficacy. The present study aimed to explore the effects of midkine (MDK) on the resistance of BTC cells to gemcitabine. Cell viability and proliferation were measured by a Cell Counting Kit‑8 assay and 5‑ethynyl‑2'‑deoxyuridine staining, respectively. Western blot analysis was used to detect the expression of E‑cadherin and vimentin...
January 18, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29343837/neurocognitive-dysfunction-in-hematopoietic-cell-transplant-recipients-expert-review-from-the-late-effects-and-quality-of-life-working-committee-of-the-cibmtr-and-complications-and-quality-of-life-working-party-of-the-ebmt
#3
REVIEW
David Buchbinder, Debra Lynch Kelly, Rafael F Duarte, Jeffery J Auletta, Neel Bhatt, Michael Byrne, Zachariah DeFilipp, Melissa Gabriel, Anuj Mahindra, Maxim Norkin, Helene Schoemans, Ami J Shah, Ibrahim Ahmed, Yoshiko Atsuta, Grzegorz W Basak, Sara Beattie, Sita Bhella, Christopher Bredeson, Nancy Bunin, Jignesh Dalal, Andrew Daly, James Gajewski, Robert Peter Gale, John Galvin, Mehdi Hamadani, Robert J Hayashi, Kehinde Adekola, Jason Law, Catherine J Lee, Jane Liesveld, Adriana K Malone, Arnon Nagler, Seema Naik, Taiga Nishihori, Susan K Parsons, Angela Scherwath, Hannah-Lise Schofield, Robert Soiffer, Jeff Szer, Ida Twist, Anne B Warwick, Baldeep M Wirk, Jean Yi, Minoo Battiwalla, Mary D E Flowers, Bipin Savani, Bronwen E Shaw
Hematopoietic cell transplantation (HCT) is a potentially curative treatment for children and adults with malignant and non-malignant diseases. Despite increasing survival rates, long-term morbidity following HCT is substantial. Neurocognitive dysfunction is a serious cause of morbidity, yet little is known about neurocognitive dysfunction following HCT. To address this gap, collaborative efforts of the Center for International Blood and Marrow Transplant Research and the European Society for Blood and Marrow Transplantation undertook an expert review of neurocognitive dysfunction following HCT...
January 17, 2018: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/29341780/interplay-of-correlations-and-kohn-anomalies-in-three-dimensions-quantum-criticality-with-a-twist
#4
T Schäfer, A A Katanin, K Held, A Toschi
A general understanding of quantum phase transitions in strongly correlated materials is still lacking. By exploiting a cutting-edge quantum many-body approach, the dynamical vertex approximation, we make important progress, determining the quantum critical properties of the antiferromagnetic transition in the fundamental model for correlated electrons, the Hubbard model in three dimensions. In particular, we demonstrate that-in contradiction to the conventional Hertz-Millis-Moriya theory-its quantum critical behavior is driven by the Kohn anomalies of the Fermi surface, even when electronic correlations become strong...
July 28, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341687/maximally-symmetric-composite-higgs-models
#5
Csaba Csáki, Teng Ma, Jing Shu
Maximal symmetry is a novel tool for composite pseudo Goldstone boson Higgs models: it is a remnant of an enhanced global symmetry of the composite fermion sector involving a twisting with the Higgs field. Maximal symmetry has far-reaching consequences: it ensures that the Higgs potential is finite and fully calculable, and also minimizes the tuning. We present a detailed analysis of the maximally symmetric SO(5)/SO(4) model and comment on its observational consequences.
September 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341659/new-boundary-driven-twist-states-in-systems-with-broken-spatial-inversion-symmetry
#6
Kjetil M D Hals, Karin Everschor-Sitte
A full description of a magnetic sample includes a correct treatment of the boundary conditions (BCs). This is in particular important in thin film systems, where even bulk properties might be modified by the properties of the boundary of the sample. We study generic ferromagnets with broken spatial inversion symmetry and derive the general micromagnetic BCs of a system with Dzyaloshinskii-Moriya interaction (DMI). We demonstrate that the BCs require the full tensorial structure of the third-rank DMI tensor and not just the antisymmetric part, which is usually taken into account...
September 22, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341388/venous-anastomosis-by-piggyback-technique-to-avoid-twisting-of-the-pediatric-en-bloc-kidney-grafts
#7
Jun Li, Raphael Schild, Jochen Herrmann, Jun Oh, Lutz Fischer, Martina Koch
This is the first report of using piggyback technique for the venous anastomosis in two pediatric recipients of small en bloc kidneys, which was found to be effective to avoid twisting of the grafts and vessels. The donors were aged 2 and 3 years with a body weight of 17 and 20 kg. The recipient age was 14 and 16 years with a body weight of 42 and 54 kg. The implantation was done extraperitoneally in the right iliac fossa. The donor's inferior vena cava was anastomosed to the recipient's distal caval vein side-to-side using 6-0 polydioxanone running suture as the piggyback technique, initially dealing with the short vena cava graft in the first case...
January 16, 2018: Pediatric Transplantation
https://www.readbyqxmd.com/read/29341382/synthesis-crystal-analysis-and-optoelectronic-properties-of-diazole-functionalized-acenes-and-azaacenes
#8
Jinchong Xiao, Huahang Pan, Tingting Song, Xiaomeng Yin, Pengcheng Jin
Doping heteroatoms into the skeletons of parent acenes can provide more chances to construct novel thermally and photo-stable organic π-conjugated semiconductors. Herein, a family of diazole-decorated acenes (APyS and APySe) and azaacenes (PyP, PyTh, PyPy, PyPh and PyAP) have been successfully synthesized through the classical reactions. Single crystal X-ray analyses showed that these as-formed diazole-modified derivatives adopted twisted topology configuration, whereas the azaacenes display reclining-chair architectures, besides twisted structure...
January 17, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29341302/twisted-charge-transfer-antennas-for-ultra-bright-terbium-iii-and-dysprosium-iii-bioprobes
#9
Anh Thy Bui, Amandine Roux, Alexei Grichine, Alain Duperray, Chantal Andraud, Olivier Maury
The design of original twisted charge transfer antennas where a non planar geometry is enforced thanks to one or two bulky ortho-Me substituents allows us to prepare the corresponding ultra-bright Tb(III) and Dy(III) bioprobes. The brightness of the Tb(III) derivative compares well with that of the benchmark Tb-Lumi4 complex. The first bio-imaging experiments with a Dy(III) luminescent bioprobe are also reported.
January 17, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29341285/2-2-bipyridine-equipped-with-a-disulfide-dithiol-switch-for-coupled-two-electron-and-proton-transfer
#10
Mauricio Cattaneo, Christine Schiewer, Anne Schober, Sebastian Dechert, Inke Siewert, Franc Meyer
[1,2]dithiino[4,3-b:5,6-b']dipyridine (1) and its protonated open form 3,3'-dithiol-2,2'-bipyridine (2) were synthesised and their interconversion investigated. The X-ray structure of 2 revealed an anti orientation of the two pyridine units and a zwitterionic form. In depth electrochemical studies in combination with DFT calculations lead to a comprehensive picture of the redox chemistry of 1 in the absence and presence of protons. Initial one electron reduction at E1 = -1.97 V results in the formation of the radical anion 1red with much elongated S-S bond, which readily undergoes further reduction at E2 = -2...
January 17, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29337795/renal-decapsulation-to-treat-ischemic-acute-kidney-injury-a-new-twist-in-an-old-tale
#11
Roger G Evans
No abstract text is available yet for this article.
February 2018: Critical Care Medicine
https://www.readbyqxmd.com/read/29337056/comparison-of-epithelial-mesenchymal-transition-mediated-tyrosine-kinase-inhibitor-resistance-in-non-small-cell-lung-cancer-cell-lines-with-wild-type-egfr-and-mutant-type-egfr
#12
Tsatsral Iderzorig, Joseph Kellen, Chike Osude, Sanjana Singh, James A Woodman, Christian Garcia, Neelu Puri
In the United States, lung cancer is the second most common cancer in men and women. In 2017, 222,500 new cases and 155,870 deaths from lung cancer are estimated to have occurred. A tyrosine kinase receptor, epidermal growth factor receptor (EGFR) is over expressed or mutated in non-small cell lung cancer (NSCLC) resulting in increased cell proliferation and survival. Tyrosine kinase inhibitors (TKIs) are currently being used as therapy for NSCLC patients, however, they have limited efficacy in NSCLC patients due to acquisition of resistance...
January 11, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29336682/preliminary-phylogeny-of-coemansia-kickxellales-with-descriptions-of-four-new-species-from-taiwan
#13
Shu-Cheng Chuang, Hsiao-Man Ho, Nicole Reynolds, Matthew E Smith, Gerald L Benny, Chiu-Yuan Chien, Ju-Lin Tsai
Four new species of Coemansia from Taiwan are described. Three produce spirally twisted sporangiophores, and these new taxa increase the number of species in the Coemansia spiralis complex from three to six. Each new taxon is morphologically unique. Coemansia biformis, sp. nov., has two different asexual reproductive types on the same thallus; one is straight and the other has a spiral fertile region. Coemansia helicoidea, sp. nov., has stoloniferous sporangiophores with a helicoid fertile region. Coemansia pennisetoides, sp...
November 13, 2017: Mycologia
https://www.readbyqxmd.com/read/29336547/efficient-blue-and-yellow-organic-light-emitting-diodes-enabled-by-aggregation-induced-emission
#14
N Venkatramaiah, G Dinesh Kumar, Yogesh Chandrasekaran, Ramesh Ganduri, Satish Patil
A new class of donor-bridge-acceptor (D-π-A) π-conjugated light-emitting molecules comprising carbazole as donor and maleimide (Cbz-MI, Cbz-MI(d)), phthalimide (Cbz-Pth) as acceptor units with phenyl ring as spacer have been synthesized in good yields. These compounds exhibit high quantum yield with three distinct emission colors yellowish-green (Cbz-MI), bright yellow Cbz-MI(d), and sky blue (Cbz-Pth) in the solid state. Single-crystal X-ray and quantum chemical calculations reveals that twisting of the phenyl rings with high torsional angle on maleimide and phthalimide units reduce the effective inter-chromophore electronic coupling, furnish dramatic changes in their photophysical properties in solution and solid states...
January 16, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29336500/9-9-bifluorenylidene-cored-perylene-diimide-acceptors-for-as-cast-non-fullerene-organic-solar-cells-the-isomeric-effect-on-optoelectronic-properties
#15
Yuan Zhao, Huan Wang, Shengpeng Xia, Feng Zhou, Zhenghui Luo, Jiajia Luo, Feng He, Chuluo Yang
Two different non-fullerene small molecule acceptors, named m-PIB and p-PIB based on 9,9'-bifluorenylidene (BF) and perylene diimide (PDI) were designed and synthesized. Four β-substituted PDIs were linked to 9,9'-bifluorenylidene in different positions. Based on the analysis of density function theory (DFT), p-PIB exhibited reduced intramolecular twisting between the perylene diimide moieties, more delocalized wave function and sufficiently wider π-electron delocalization compared to m-PIB. The absorption ability of p-PIB was enhanced due to the increased intermolecular interaction...
January 16, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29335413/heliconical-smectic-phases-formed-by-achiral-molecules
#16
Jordan P Abberley, Ross Killah, Rebecca Walker, John M D Storey, Corrie T Imrie, Mirosław Salamończyk, Chenhui Zhu, Ewa Gorecka, Damian Pociecha
Chiral symmetry breaking in soft matter is a hot topic of current research. Recently, such a phenomenon was found in a fluidic phase showing orientational order of molecules-the nematic phase; although built of achiral molecules, the phase can exhibit structural chirality-average molecular direction follows a short-pitch helix. Here, we report a series of achiral asymmetric dimers with an odd number of atoms in the spacer, which form twisted structures in nematic as well as in lamellar phases. The tight pitch heliconical nematic (NTB) phase and heliconical tilted smectic C (SmCTB) phase are formed...
January 15, 2018: Nature Communications
https://www.readbyqxmd.com/read/29334140/slit-tubes-for-semisoft-pneumatic-actuators
#17
Lee Belding, Bilge Baytekin, Hasan Tarik Baytekin, Philipp Rothemund, Mohit S Verma, Alex Nemiroski, Dan Sameoto, Bartosz A Grzybowski, George M Whitesides
This article describes a new principle for designing soft or 'semisoft' pneumatic actuators: SLiT (for SLit-in-Tube) actuators. Inflating an elastomeric balloon, when enclosed by an external shell (a material with higher Young's modulus) containing slits of different directions and lengths, produces a variety of motions, including bending, twisting, contraction, and elongation. The requisite pressure for actuation depends on the length of the slits, and this dependence allows sequential actuation by controlling the applied pressure...
January 15, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29333702/maml1-and-twist1-co-overexpression-promote-invasion-of-head-and-neck-squamous-cell-carcinoma
#18
Sima Ardalan Khales, Ehsan Ebrahimi, Eisa Jahanzad, Sahar Ardalan Khales, Mohammad Mahdi Forghanifard
AIMS: Head and neck squamous cell carcinoma (HNSCC) is the seventh most common cancer worldwide with considerable morbidity and mortality. Invasion and metastasis of HNSCC is a complex process involving multiple molecules and signaling pathways. Twist Family BHLH Transcription Factor 1 (TWIST1) and Mastermind-like 1 (MAML1) are essential in induction of epithelial-mesenchymal transition through direct regulation of implicated molecules in cellular adhesion, migration and invasion. Our aim in this study was to assess the clinical significance of MAML1 and TWIST1 expression in HNSCC, and elucidate the probable correlation between these genes to exhibit their possible associations with progression and metastasis of the disease...
January 15, 2018: Asia-Pacific Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29333573/simultaneous-site-directed-mutagenesis-of-duplicated-loci-in-soybean-using-a-single-guide-rna
#19
Yuhei Kanazashi, Aya Hirose, Ippei Takahashi, Masafumi Mikami, Masaki Endo, Sakiko Hirose, Seiichi Toki, Akito Kaga, Ken Naito, Masao Ishimoto, Jun Abe, Tetsuya Yamada
Using a gRNA and Agrobacterium-mediated transformation, we performed simultaneous site-directed mutagenesis of two GmPPD loci in soybean. Mutations in GmPPD loci were confirmed in at least 33% of T2 seeds. The clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated endonuclease 9 (Cas9) system is a powerful tool for site-directed mutagenesis in crops. Using a single guide RNA (gRNA) and Agrobacterium-mediated transformation, we performed simultaneous site-directed mutagenesis of two homoeologous loci in soybean (Glycine max), GmPPD1 and GmPPD2, which encode the orthologs of Arabidopsis thaliana PEAPOD (PPD)...
January 15, 2018: Plant Cell Reports
https://www.readbyqxmd.com/read/29331998/torsion-and-rupture-of-a-non-communicating-rudimentary-horn-in-a-17-week-gestation-in-a-16-year-old-girl-lessons-learnt
#20
Namrata Kumar, Vinita Das, Amita Pandey, Smriti Agrawal
A unicornuate uterus with non-communicating rudimentary horn has always been notorious and poses threat to continuation of pregnancy with dismal consequences. We are reporting an interesting case of uterine malformation with a 90° rotation of uterine axis which ultimately ruptured during termination of pregnancy. The rarity in our case was not only conception in non-communicating horn but also the complete twisting of axis which made the pregnant horn come in front of the non-gravid unicornuate uterus, mimicking normal pregnancy...
January 13, 2018: BMJ Case Reports
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