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https://www.readbyqxmd.com/read/29655325/an-atomic-mean-field-spin-orbit-approach-within-exact-two-component-theory-for-a-non-perturbative-treatment-of-spin-orbit-coupling
#1
Junzi Liu, Lan Cheng
An atomic mean-field (AMF) spin-orbit (SO) approach within exact two-component theory (X2C) is reported, thereby exploiting the exact decoupling scheme of X2C, the one-electron approximation for the scalar-relativistic contributions, the mean-field approximation for the treatment of the two-electron SO contribution, and the local nature of the SO interactions. The Hamiltonian of the proposed SOX2CAMF scheme comprises the one-electron X2C Hamiltonian, the instantaneous two-electron Coulomb interaction, and an AMF SO term derived from spherically averaged Dirac-Coulomb Hartree-Fock calculations of atoms; no molecular relativistic two-electron integrals are required...
April 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29649637/angiogenesis-impairment-by-the-nadph-oxidase-triggered-oxidative-stress-at-the-bone-implant-interface-critical-mechanisms-and-therapeutic-targets-for-implant-failure-under-hyperglycemic-conditions-in-diabetes
#2
Xiao-Fan Hu, Lin Wang, Geng Xiang, Wei Lei, Ya-Fei Feng
Mechanism underlying the diabetes-induced poor osteointegration of implants remains elusive, making it a challenge to develop corresponding solutions. Here, we studied the role of angiogenesis in the diabetes-induced poor bone repair at the bone-implant interface (BII) and the related mechanisms. In vivo, titanium screws were implanted in the femurs of mice, and, in vitro, vascular endothelial cell (VEC) was cultured on titanium surface. Results showed that, compared with normal milieu (NM), diabetic milieu (DM) led to angiogenesis inhibition around implants which resulted in reduced osteoprogenitors and poor bone formation on BII in vivo...
April 9, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29643985/replication-incompetent-gammaretroviral-and-lentiviral-vector-based-insertional-mutagenesis-screens-identify-prostate-cancer-progression-genes
#3
Victor M Bii, Casey P Collins, Jonah D Hocum, Grant D Trobridge
Replication-incompetent gammaretroviral (γRV) and lentiviral (LV) vectors have both been used in insertional mutagenesis screens to identify cancer drivers. In this approach the vectors stably integrate in the host cell genome and induce cancers by dysregulating nearby genes. The cells that contain a retroviral vector provirus in or near a proto-oncogene or tumor suppressor are preferentially enriched in a tumor. γRV and LV vectors have different integration profiles and genotoxic potential, making them potentially complementary tools for insertional mutagenesis screens...
March 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29625790/transfusion-associated-hazards-a-revisit-of-their-presentation
#4
O Garraud, C Sut, A Haddad, S Tariket, C Aloui, S Laradi, H Hamzeh-Cognasse, T Bourlet, F Zeni, C Aubron, Y Ozier, S Laperche, T Peyrard, P Buffet, D Guyotat, E Tavernier, F Cognasse, B Pozzetto, G Andreu
As a therapy or a support to other therapies, despite being largely beneficial to patients in general, transfusion it is not devoid of some risks. In a moderate number of cases, patients may manifest adverse reactions, otherwise referred to as transfusion-associated hazards (TAHs). The latest French 2016 haemovigilance report indicates that 93% of TAHs are minor (grade 1), 5.5% are moderate (grade 2) and 1.6% are severe (grade 3), with only five deaths (grade 4) being attributed to transfusion with relative certainty (imputability of level [or grade] 1 to 3)...
April 3, 2018: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/29608059/-c-6-h-13-n-2-bii-5-a-one-dimensional-lead-free-perovskite-derivative-photoconductive-light-absorber
#5
Weichuan Zhang, Kewen Tao, Chengmin Ji, Zhihua Sun, Shiguo Han, Jing Zhang, Zhenyue Wu, Junhua Luo
Lead-free organic-inorganic hybrid perovskites have recently attracted intense interest as environmentally friendly, low-cost, chemically stable light absorbers. Here, we reported a new one-dimensional (1D) zigzag chainlike light-absorbing hybrid material of (C6 H13 N)2 BiI5 , in which the corner-sharing octahedral bismuth halide chains are surrounded by organic cations of tetramethylpiperidinium. This unique zigzag 1D hybrid perovskite-derivative material shows a narrow direct band gap of 2.02 eV and long-lived photoluminescence, which is encouraging for optoelectronic applications...
April 2, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29600908/pedicle-screws-with-a-thin-hydroxyapatite-coating-for-improving-fixation-at-the-bone-implant-interface-in-the-osteoporotic-spine-experimental-study-in-a-porcine-model
#6
Makoto Ohe, Hiroshi Moridaira, Satoshi Inami, Daisaku Takeuchi, Yutaka Nohara, Hiroshi Taneichi
OBJECTIVE Instrumentation failure caused by the loosening of pedicle screws (PSs) in patients with osteoporosis is a serious problem after spinal surgery. The addition of a thin hydroxyapatite (HA) surface coating applied by using a sputtering process was reported recently to be a promising method for providing bone conduction around an implant without a significant risk of coating-layer breakage. In this study, the authors evaluated the biomechanical and histological features of the bone-implant interface (BII) of PSs with a thin HA coating in an in vivo porcine osteoporotic spine model...
March 30, 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29577220/-comparison-of-the-safety-and-the-costs-between-laparoscopic-assisted-or-totally-laparoscopic-uncut-roux-en-y-and-billrothii-braun-reconstruction-a-single-center-prospective-cohort-study
#7
Yinkui Wang, Ziyu Li, Fei Shan, Lianhai Zhang, Shuangxi Li, Yongning Jia, Yufan Chen, Kan Xue, Rulin Miao, Zhemin Li, Xiangyu Gao, Chao Yan, Shen Li, Zhouqiao Wu, Jiafu Ji
OBJECTIVE: To compare the short-term safety and costs between laparoscopic assisted or totally laparoscopic uncut Roux-en-Y and Billroth II((BII() + Braun reconstruction after radical gastrectomy of distal gastric cancer. METHODS: Clinical data from our prospective database of radical gastrectomy were systematically analyzed. The patients who underwent laparoscopic gastrectomy with uncut Roux-en-Y or BII(+ Braun reconstruction between March 1st, 2015 and June 30th, 2017 were screened out for further analysis...
March 25, 2018: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/29534535/chondroprotective-effects-and-mechanisms-of-dextromethorphan-repurposing-antitussive-medication-for-osteoarthritis-treatment
#8
Liv Weichien Chen, Feng-Cheng Liu, Li-Feng Hung, Chuan-Yueh Huang, Shiu-Bii Lien, Leou-Chyr Lin, Jenn-Haung Lai, Ling-Jun Ho
Osteoarthritis (OA) is the most common joint disorder and primarily affects older people. The ideal anti-OA drug should have a modest anti-inflammatory effect and only limited or no toxicity for long-term use. Because the antitussive medication dextromethorphan (DXM) is protective in atherosclerosis and neurological diseases, two common disorders in aged people, we examined whether DXM can be protective in pro-inflammatory cytokine-stimulated chondrocytes and in a collagen-induced arthritis (CIA) animal model in this study...
March 12, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29513847/building-infestation-index-for-aedes-aegypti-and-occurrence-of-dengue-fever-in-the-municipality-of-foz-do-igua%C3%A3-u-paran%C3%A3-brazil-from-2001-to-2016
#9
Açucena Veleh Rivas, Renata Defante, Robson Michael Delai, Jean Avemir Rios, André da Silva Britto, André de Souza Leandro, Daniela Dib Gonçalves
INTRODUCTION: the Building Infestation Index (BII) uses the Rapid Assay of the Larval Index for Aedes aegypti (LIRAa) to express the relationship between positive and surveyed properties. We evaluated LIRAa and the relationship between the BII and climate variables for dengue cases in Foz do Iguaçu municipality, Paraná. METHODS: Spearman's correlations for mean precipitation, mean temperature, BII, and dengue cases (time lag). RESULTS: positive correlations between BII and cases, and mean temperature and cases at two months...
January 2018: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/29513759/subtype-assignment-of-cll-based-on-b-cell-subset-associated-gene-signatures-from-normal-bone-marrow-a-proof-of-concept-study
#10
Caroline Holm Nørgaard, Lasse Hjort Jakobsen, Andrew J Gentles, Karen Dybkær, Tarec Christoffer El-Galaly, Julie Støve Bødker, Alexander Schmitz, Preben Johansen, Tobias Herold, Karsten Spiekermann, Jennifer R Brown, Josephine L Klitgaard, Hans Erik Johnsen, Martin Bøgsted
Diagnostic and prognostic evaluation of chronic lymphocytic leukemia (CLL) involves blood cell counts, immunophenotyping, IgVH mutation status, and cytogenetic analyses. We generated B-cell associated gene-signatures (BAGS) based on six naturally occurring B-cell subsets within normal bone marrow. Our hypothesis is that by segregating CLL according to BAGS, we can identify subtypes with prognostic implications in support of pathogenetic value of BAGS. Microarray-based gene-expression samples from eight independent CLL cohorts (1,024 untreated patients) were BAGS-stratified into pre-BI, pre-BII, immature, naïve, memory, or plasma cell subtypes; the majority falling within the memory (24...
2018: PloS One
https://www.readbyqxmd.com/read/29505032/single-cell-developmental-classification-of-b-cell-precursor-acute-lymphoblastic-leukemia-at-diagnosis-reveals-predictors-of-relapse
#11
Zinaida Good, Jolanda Sarno, Astraea Jager, Nikolay Samusik, Nima Aghaeepour, Erin F Simonds, Leah White, Norman J Lacayo, Wendy J Fantl, Grazia Fazio, Giuseppe Gaipa, Andrea Biondi, Robert Tibshirani, Sean C Bendall, Garry P Nolan, Kara L Davis
Insight into the cancer cell populations that are responsible for relapsed disease is needed to improve outcomes. Here we report a single-cell-based study of B cell precursor acute lymphoblastic leukemia at diagnosis that reveals hidden developmentally dependent cell signaling states that are uniquely associated with relapse. By using mass cytometry we simultaneously quantified 35 proteins involved in B cell development in 60 primary diagnostic samples. Each leukemia cell was then matched to its nearest healthy B cell population by a developmental classifier that operated at the single-cell level...
May 2018: Nature Medicine
https://www.readbyqxmd.com/read/29473301/a-novel-uhplc-ms-ms-method-for-the-simultaneous-determination-of-xanthones-and-steroidal-saponins-in-crude-and-salt-processed-anemarrhenae-rhizoma-aqueous-extracts
#12
De Ji, Xiaonan Su, Ziyan Huang, Qiaohan Wang, Tulin Lu
We established a rapid and sensitive ultrahigh performance liquid chromatography tandem mass spectrometry method for the simultaneous quantification of xanthones and steroidal saponins in rat plasma. Chromatographic separation was achieved on a C18 column with a mobile phase comprising acetonitrile and 0.1% formic acid. The detection was performed by negative electrospray ionization in multiple reaction monitoring mode. The validated method showed good linearity within the tested range (r > 0.9945). The intra- and inter-day precision at high, medium, and low concentrations were less than 7...
February 23, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29453061/effect-of-u-vi-aqueous-speciation-on-the-binding-of-uranium-by-the-cell-surface-of-rhodotorula-mucilaginosa-a-natural-yeast-isolate-from-bentonites
#13
Margarita Lopez-Fernandez, Maria Romero-González, Alix Günther, Pier L Solari, Mohamed L Merroun
This study presents the effect of aqueous uranium speciation (U-hydroxides and U-hydroxo-carbonates) on the interaction of this radionuclide with the cells of the yeast Rhodotorula mucigilanosa BII-R8. This strain was isolated from Spanish bentonites considered as reference materials for the engineered barrier components of the future deep geological repository of radioactive waste. X-ray absorption and infrared spectroscopy showed that the aqueous uranium speciation has no effect on the uranium binding process by this yeast strain...
February 9, 2018: Chemosphere
https://www.readbyqxmd.com/read/29393856/aerobic-method-for-the-synthesis-of-nearly-size-monodisperse-bismuth-nanoparticles-from-a-redox-non-innocent-precursor
#14
Hayden Winter, Elena Christopher-Allison, Anna L Brown, Andrea Mitchell Goforth
Herein, we report an aerobic synthesis method to produce bismuth nanoparticles (Bi NPs) with average diameters in the range 40-80 nm using commercially available bismuth triiodide (BiI<sub>3</sub>) as starting material; the method uses only readily available chemicals and conventional laboratory equipment. Furthermore, size data from replicates of the synthesis under standard reaction conditions indicate that this method is highly reproducible in achieving Bi NP populations with low standard deviations in the mean diameters...
February 2, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29107659/is-this-blood-an-erp-study-on-the-visual-identification-of-red-fluids-in-patients-with-blood-phobia
#15
Verena Leutgeb, Daniela Schwab, Wilfried Scharmüller, Carina Höfler, Anne Schienle
Blood can be easily recognized in situations involving injury. However, very little is known about the ability of humans to identify blood without such context information. We investigated the blood detection capacity and associated electrocortical correlates (event-related potentials) in 20 women with blood phobia and 20 non-phobic females. The participants viewed images depicting droplets of pig blood, and water with pink or red food coloring. They were asked to decide, whether the pictures showed real blood or not...
January 1, 2018: Brain Research
https://www.readbyqxmd.com/read/29106449/allosigma-allosteric-signaling-and-mutation-analysis-server
#16
Enrico Guarnera, Zhen Wah Tan, Zejun Zheng, Igor N Berezovsky
Motivation: Allostery is an omnipresent mechanism of the function modulation in proteins via either effector binding or mutations in the exosites. Despite the growing number of online servers and databases devoted to prediction/classification of allosteric sites and their characteristics, there is a lack of resources for an efficient and quick estimation of the causality and energetics of allosteric communication. Results: The AlloSigMA server implements a unique approach on the basis of the recently introduced structure-based statistical mechanical models of allosteric signaling...
July 6, 2017: Bioinformatics
https://www.readbyqxmd.com/read/29100990/evaluation-of-the-multiplex-pcr-allplex-gi-assay-in-the-detection-of-bacterial-pathogens-in-diarrheic-stool-samples
#17
Ariadna Martín, Ana Pérez-Ayala, Fernando Chaves, David Lora, M Ángeles Orellana
Rapid and accurate detection of the pathogens that cause gastrointestinal infection is important for appropriate therapy and proper infection control. This study assesses the performance of a new molecular assay for simultaneous detection of 13 different gastrointestinal bacteria in stool specimens. Using the Allplex GI-Bacteria (AGI-BI/AGI-BII) assay, a total of 394 stool samples were tested and the results were compared with culturing on selective differential followed by identification by mass spectroscopy...
January 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29057824/a-dna-structural-alphabet-distinguishes-structural-features-of-dna-bound-to-regulatory-proteins-and-in-the-nucleosome-core-particle
#18
Bohdan Schneider, Paulína Božíková, Petr Čech, Daniel Svozil, Jiří Černý
We analyzed the structural behavior of DNA complexed with regulatory proteins and the nucleosome core particle (NCP). The three-dimensional structures of almost 25 thousand dinucleotide steps from more than 500 sequentially non-redundant crystal structures were classified by using DNA structural alphabet CANA (Conformational Alphabet of Nucleic Acids) and associations between ten CANA letters and sixteen dinucleotide sequences were investigated. The associations showed features discriminating between specific and non-specific binding of DNA to proteins...
October 18, 2017: Genes
https://www.readbyqxmd.com/read/29040633/prevalence-of-pre-antiretroviral-treatment-drug-resistance-by-gender-age-and-other-factors-in-hiv-infected-individuals-initiating-therapy-in-kenya-2013-2014
#19
Rachel A Silverman, Ingrid A Beck, Catherine Kiptinness, Molly Levine, Ross Milne, Christine J McGrath, Steve Bii, Barbra A Richardson, Grace John-Stewart, Bhavna Chohan, Samah R Sakr, James N Kiarie, Lisa M Frenkel, Michael H Chung
Background: Pre-antiretroviral-treatment drug resistance (PDR) is a predictor of human immunodeficiency virus (HIV) treatment failure. We determined PDR prevalence and correlates in a Kenyan cohort. Methods: We conducted a cross-sectional analysis of antiretroviral (ARV) treatment-eligible HIV-infected participants. PDR was defined as ≥2% mutant frequency in a participant's HIV quasispecies at pol codons K103N, Y181C, G190A, M184 V, or K65R by oligonucleotide ligation assay and Illumina sequencing...
December 19, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28991913/diagnosis-disclosure-to-adolescents-living-with-hiv-in-rural-kenya-improves-antiretroviral-therapy-adherence-and-immunologic-outcomes-a-retrospective-cohort-study
#20
Gregg Joseph Montalto, Fredrick K Sawe, Argwings Miruka, Jonah Maswai, Ignatius Kiptoo, Appolonia Aoko, Chrispine Oreyo, Eunice Obiero, Sheila Korir, Stephen K Bii, Katherine X Song, Anjali N Kunz
BACKGROUND & AIMS: Emphasis on adolescent HIV has increased worldwide as antiretroviral treatment has greatly extended life expectancies of HIV-positive children. Few evidence-based guidelines exist on the optimal time to disclose to an adolescent living with HIV (ALHIV); little is known about the medical effects of disclosure. This study looked to determine whether disclosure is associated with improved medical outcomes in ALHIV. Prior work has tended to be qualitative, cross-sectional, and with an emphasis on psychosocial outcomes...
2017: PloS One
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