keyword
MENU ▼
Read by QxMD icon Read
search

DASH

keyword
https://www.readbyqxmd.com/read/28726935/strength-character-and-directionality-of-halogen-bonds-involving-cationic-halogen-bond-donors
#1
Kevin E Riley, Khanh-An Tran
Halogen bonds involving cationic halogen bond donors and anionic halogen bond acceptors have recently been recognized as being important in stabilizing the crystal structures of many salts. Theoretical characterization of these types of interactions, most importantly in terms of their directionality, has been limited. Here we generate high-quality symmetry adapted perturbation theory potential energy curves of a H3N-C[triple bond, length as m-dash]C-Br(+)Cl(-) model system in order to characterize halogen bonds involving charged species, in terms of contributions from electrostatics, exchange, induction, and dispersion, with special emphasis on analyzing contributions that are most responsible for the directionality of these interactions...
July 20, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28726930/competition-and-selectivity-in-supramolecular-synthesis-structural-landscape-around-1-pyridylmethyl-2-2-biimidazoles
#2
C A Gunawardana, J Desper, A S Sinha, M Ðaković, C B Aakeröy
Three isomeric forms of 1-(pyridylmethyl)-2,2'-biimidazole, A1-A3, have been synthesized and subjected to systematic co-crystallizations with selected hydrogen- and halogen-bond donors in order to explore the impact of electrostatics and geometry on the resulting supramolecular architectures. The solid-state supramolecular behavior of A1-A3 is largely consistent in halogen-bonded co-crystals. Only two types of primary interactions, the N-HN/NH-N homomeric hydrogen-bond interactions responsible for the pairing of biimidazole moieties and the IN(pyridine) halogen bonds responsible for the co-crystal formation and structure extension, are present in these systems...
July 20, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28726913/mechanistic-insights-into-dioxygen-activation-oxygen-atom-exchange-and-substrate-epoxidation-by-asqj-dioxygenase-from-quantum-mechanical-molecular-mechanical-calculations
#3
Xudan Song, Jiarui Lu, Wenzhen Lai
Herein, we use in-protein quantum mechanical/molecular mechanical (QM/MM) calculations to elucidate the mechanism of dioxygen activation, oxygen atom exchange and substrate epoxidation processes by AsqJ, an Fe(II)/α-ketoglutarate-dependent dioxygenase (α-KGD) using a 2-His-1-Asp facial triad. Our results demonstrated that the whole reaction proceeds through a quintet surface. The dioxygen activation by AsqJ leads to a quintet penta-coordinated Fe(IV)-oxo species, which has a square pyramidal geometry with the oxo group trans to His134...
July 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28726895/a-fluorescence-electrochemical-study-of-carbon-nanodots-cnds-in-bio-and-photoelectronic-applications-and-energy-gap-investigation
#4
Zheng Zeng, Wendi Zhang, Durga M Arvapalli, Brian Bloom, Alex Sheardy, Taylor Mabe, Yiyang Liu, Zuowei Ji, Harish Chevva, David H Waldeck, Jianjun Wei
Carbon nanodots (CNDs) have attracted great attention due to their superior solubility, biocompatibility, tunable photoluminescence, and opto-electronic properties. This work describes a new fluorescence-based spectroelectrochemistry approach to simultaneously study the photoluminescence and wavelength dependent photocurrent of microwave synthesized CNDs. The fluorescence of CNDs shows selective quenching upon a reversible redox couple, ferricyanide/ferrocyanide, reaction during cyclic voltammetry. The CND modified gold slide electrode demonstrates wavelength dependent photocurrent generation during the fluorescence-electrochemical study, suggesting the potential application of CNDs in photoelectronics...
July 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28726879/o-phthalaldehyde-catalyzed-hydrolysis-of-organophosphinic-amides-and-other-p-double-bond-length-as-m-dash-o-nh-containing-compounds
#5
Bin-Jie Li, Ryan D Simard, André M Beauchemin
Over 50 years ago, Jencks and Gilchrist showed that formaldehyde catalyses the hydrolysis of phosphoramidate through electrophilic activation, induced by covalent attachment to its nitrogen atom. Given our interest in the use of aldehydes as catalysts, this work was revisited to identify a superior catalyst, o-phthalaldehyde, which facilitates hydrolyses of various organophosphorus compounds bearing P([double bond, length as m-dash]O)-NH subunits under mild conditions. Interestingly, chemoselective hydrolysis of the P([double bond, length as m-dash]O)-N bonds could be accomplished in the presence of P([double bond, length as m-dash]O)-OR bonds...
July 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28725505/long-volar-plating-for-metadiaphyseal-fractures-of-distal-radius-study-comparing-minimally-invasive-plate-osteosynthesis-versus-conventional-approach
#6
Emilie Pire, Juan José Hidalgo Diaz, Santiago Salazar Botero, Sybille Facca, Philippe A Liverneaux
Background  Minimally invasive plate osteosynthesis (MIPO) has been used in wrist surgery for several years. The purpose of this retrospective study was to compare clinical and radiologic outcomes of MIPO technique with those of a conventional approach in the treatment of metadiaphyseal distal radius fracture by long volar plating. Materials and Methods  Our series consisted of 32 fractures in 31 patients, mean age 63.9 years, including 16 men and 15 women. MIPO technique was used in 15 wrists (group 1) and conventional approach (> 60 mm of skin incision) in 17 wrists (group 2)...
August 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28725503/patient-rated-wrist-evaluation-spanish-version-and-evaluation-of-its-psychometric-properties-in-patients-with-acute-distal-radius-fracture
#7
Veronica Alfie, Gerardo Gallucci, Jorge Boretto, Agustin Donndorff, Juieta Puig Dubois, Sonia Benitez, Diego Giunta, Pablo de Carli
Purpose  The purpose of this paper is to validate a Spanish version of patient-rated wrist evaluation (PRWE) and evaluate its psychometric attributes in a population of patients with distal radius fracture. Material and Methods  A translation and cross-cultural adaptation of the PRWE to Spanish (PRWE-S) was performed according to standardized guidelines. A total of 50 patients with a distal radius fracture were included during the different steps of the study. The reliability of the new instrument was assessed in terms of construct validity with the Quick DASH (Disability of the Arm, Shoulder, and Hand)...
August 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28725500/volar-plate-fixation-in-patients-older-than-70-years-with-ao-type-c-distal-radial-fractures-clinical-and-radiologic-outcomes
#8
Nicolas S Piuzzi, Ezequiel E Zaidenberg, Matias Pereira Duarte, Jorge G Boretto, Agustin Donndorff, Gerardo Gallucci, Pablo De Carli
Introduction  Treatment of unstable distal radial fractures (DRFs) in elderly patients is controversial, and considering the increasing life expectancy, their appropriate treatment is of growing importance. Our aim was to analyze the clinical and radiologic outcomes in the elderly patients with AO type C DRF treated with volar locking plate (VLP). Materials and Methods  Between 2007 and 2011, 572 DRFs were operated on in our hospital with open reduction and internal fixation with VLP. Of these, only 64 patients (66 DRFs) met the selection criteria (AO type C DRF, age > 70 years, minimum 12-month follow-up)...
August 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28725498/percutaneous-transtrapezial-fixation-without-bone-graft-leads-to-consolidation-in-selected-cases-of-delayed-union-of-the-scaphoid-waist
#9
Matthias Vanhees, Roger R P van Riet, Annemieke van Haver, Radek Kebrle, Geert Meermans, Frederik Verstreken
Purpose  We evaluated clinical and radiographic outcome of percutaneous transtrapezial fixation of the scaphoid delayed union or nonunion using a headless bone screw without bone grafting. Methods  Sixteen patients with delayed union or nonunion of the scaphoid were included in this retrospective study between 2006 and 2011. All patients had a delayed presentation of scaphoid fracture, and none of them was treated conservatively elsewhere. Patients with bone graft, sclerotic bone debridement, or displacement of the fragment at the nonunion site were excluded...
August 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28721447/direct-repair-of-the-sagittal-band-for-extensor-tendon-subluxation-caused-by-finger-flicking
#10
In Tae Hong, Chi Hoon Oh, Young Suk Sim, Soo Hong Han
PURPOSE: For patients with metacarpophalangeal (MCP) extensor tendon subluxation caused by finger flicking injury, we performed an extensor tendon realignment and direct repair technique. The purpose of this study was to evaluate the clinical outcome after direct repair of the sagittal band in patients with MCP extensor tendon subluxation caused by finger flicking injury and to introduce the repair technique. METHODS: A total of 26 patients with a mean age of 39...
July 18, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28720252/the-cryptochrome-photolyase-protein-family-in-diatoms
#11
Sarah König, Matthias Juhas, Stefanie Jäger, Tilman Kottke, Claudia Büchel
The cryptochrome - photolyase family (CPF) consists of homologous flavoproteins having completely different functions involving DNA repair, circadian rhythm and/or photoreception. From the original photolyases, working either as (6-4) or cyclobutane pyrimidine dimer photolyases, the animal- and plant-type cryptochromes, respectively, evolved and also the more intermediate DASH cryptochromes. Whereas animal cryptochromes work mostly in clock-related functions, plant cryptochromes are also directly involved in developmental processes such as hypocotyl elongation or flower induction...
July 8, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28720043/open-arthroscopic-and-percutaneous-surgical-treatment-of-lateral-epicondylitis-a-systematic-review
#12
Matthew B Burn, Ronald J Mitchell, Shari R Liberman, David M Lintner, Joshua D Harris, Patrick C McCulloch
BACKGROUND: Approximately 10% of patients with lateral epicondylitis go on to have surgical treatment; however, multiple surgical treatment options exist. The purpose of this study was to review the literature for the clinical outcomes of open, arthroscopic, and percutaneous treatment of lateral epicondylitis. The authors hypothesized that the clinical outcome of all 3 analyzed surgical treatments would be equivalent. METHODS: A systematic review was performed using PubMed, Cochrane Central Register of Controlled Trials, and Google Scholar in July 2016 to compare the functional outcome, pain, grip strength, patient satisfaction, and return to work at 1-year follow-up for open, arthroscopic, and percutaneous treatment of lateral epicondylitis...
March 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28720007/extensor-pollicis-brevis-spiral-tenodesis-for-combined-metacarpophalangeal-instability-and-trapeziometacarpal-arthritis
#13
Mark Henry
BACKGROUND: In more advanced stages of trapeziometacarpal arthritis, the thumb metacarpal may develop an adduction contracture, leading to secondary hyperextension instability of the metacarpophalangeal joint. Following trapeziometacarpal arthroplasty, uncorrected substantial metacarpophalangeal hyperextension may contribute to ongoing Z-collapse deformity, weakness of pinch and grip, and patient perception of diminished function. METHODS: We prospectively analyzed a consecutive case series of 55 trapeziometacarpal arthroplasty patients (mean age, 60 years; 7 males) who received simultaneous extensor pollicis brevis spiral tenodesis for thumb metacarpophalangeal hyperextension of at least 50°...
March 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28719990/radiographic-and-clinical-assessment-of-intramedullary-nail-fixation-for-the-treatment-of-unstable-metacarpal-fractures
#14
Ather Mirza, Justin Mirza, Chris Healy, Vishaaq Mathew, Brian Lee
BACKGROUND: The purpose of the article was to evaluate clinical and radiographic outcomes in a case series of unstable metacarpal fractures treated with flexible intramedullary nail (IMN) fixation. METHODS: A total of 55 patients with unstable metacarpal fractures between 2003 and 2010 were treated with IMN fixation and followed for a minimum of 1 year. The outcomes were assessed via a radiological study of longitudinal and angular collapse, Disabilities of the Arm, Shoulder, and Hand (DASH) score, total active range of motion (ROM) of the wrist, and grip strength testing...
March 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28719982/deep-friction-massage-versus-steroid-injection-in-the-treatment-of-lateral-epicondylitis
#15
Rosemary Yi, Walter W Bratchenko, Virak Tan
BACKGROUND: The aim of the study was to determine the efficacy of deep friction massage in the treatment of lateral epicondylitis by comparing outcomes with a control group treated with splinting and therapy and with an experimental group receiving a local steroid injection. METHODS: A randomized clinical trial was conducted to compare outcomes after recruitment of consecutive patients presenting with lateral epicondylitis. Patients were randomized to receive one of 3 treatments: group 1: splinting and stretching, group 2: a cortisone injection, or group 3: a lidocaine injection with deep friction massage...
February 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28719555/the-influence-of-shortening-on-clinical-outcome-in-healed-displaced-midshaft-clavicular-fractures-after-nonoperative-treatment
#16
E B Goudie, N D Clement, I R Murray, C R Lawrence, M Wilson, A J Brooksbank, C M Robinson
BACKGROUND: We aimed to evaluate the effect of clavicular shortening, measured with 3-dimensional computed tomography (3DCT), on functional outcomes and satisfaction in patients with healed displaced midshaft clavicular fractures up to 1 year following injury. METHODS: The data used in this study were collected as part of a multicenter, prospective randomized controlled trial of open reduction and plate fixation compared with nonoperative treatment for acute, displaced midshaft clavicular factures...
July 19, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28719554/treatment-of-displaced-midshaft-clavicle-fractures-figure-of-eight-harness-versus-anterior-plate-osteosynthesis-a-randomized-controlled-trial
#17
Marcel Jun Sugawara Tamaoki, Fabio Teruo Matsunaga, Adelmo Rezende Ferreira da Costa, Nicola Archetti Netto, Marcelo Hide Matsumoto, Joao Carlos Belloti
BACKGROUND: Most midshaft clavicle fractures affect the economically active population, which is negatively impacted by transient limb impairment during the treatment. There is still debate about the advantages and disadvantages of surgical treatment for these fractures. METHODS: In this prospective randomized controlled trial, 117 patients were allocated to 1 of 2 groups: nonsurgical treatment with a figure-of-eight harness or surgical treatment with anteroinferior plate osteosynthesis...
July 19, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28719549/long-term-follow-up-of-neonatal-brachial-plexopathy-psychological-and-physical-function-in-adolescents-and-young-adults
#18
Lesley Butler, Janith Mills, Heather M Richard, Russell Riddle, Marybeth Ezaki, Scott Oishi
PURPOSE: The prevalence of neonatal brachial plexus palsy (NBPP) has been increasing since the early 1980s. No known studies have examined long-term psychological health and quality of life (QOL) in young adults. The purpose of this study was to investigate the psychosocial and intellectual aspects of NBPP during adolescence into young adulthood. METHODS: A total of 31 patients were enrolled in the adolescent group (16 to 18 y) and 25 in the young adult group (23 to 28 y)...
July 17, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28718465/structure-and-molecular-packing-in-smectic-bcr-and-ad-phases-of-schiff-base-liquid-crystal-compounds-through-the-analyses-of-layer-spacing-entropy-and-crystal-structure
#19
Yasuhisa Yamamura, Takahito Murakoshi, Sakiko Iwagaki, Natalia Osiecka, Hideki Saitoh, Mafumi Hishida, Zbigniew Galewski, Maria Massalska-Arodź, Kazuya Saito
Single-crystal structural analyses and heat capacity measurements were performed on two Schiff base liquid crystal compounds, 5CBAA (4-chlorobenzylidene-4'-pentyloxyaniline) and 5ABCA (4-pentyloxybenzylidene-4'-chloroaniline). The alkyloxy-chain of a 5CBAA molecule was conformationally ordered in the crystal at room temperature. While that of 5ABCA was partially disordered in the room temperature phase but ordered in a low-temperature phase at 100 K. The structural phase transition involving the disordering of the conformation was observed at 107 K in the heat capacity of 5ABCA...
July 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28717702/management-of-chemoradiation-induced-mucositis-in-head-and-neck-cancers-with-oral-glutamine
#20
Lucy Pattanayak, Niharika Panda, Manoj Kumar Dash, Sumita Mohanty, Sagarika Samantaray
PURPOSE: Head and neck cancers are the third most common cancers worldwide. Oral mucositis is the most common toxicity seen in patients who receive chemoradiation to treat head and neck cancer. The aim of this study was to evaluate the efficacy and safety of oral glutamine supplementation in these patients. MATERIALS AND METHODS: From December 2013 to December 2014, we randomly assigned to two arms 162 patients who had squamous cell carcinoma of the head and neck...
August 2016: Journal of Global Oncology
keyword
keyword
18743
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"