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https://www.readbyqxmd.com/read/28427102/an-intramolecular-car-h%C3%A2-%C3%A2-%C3%A2-o-c-hydrogen-bond-and-the-configuration-of-rotenoids
#1
Yulin Ren, Judith C Gallucci, A Douglas Kinghorn
Over the past half a century, the structure and configuration of the rotenoids, a group of natural products showing multiple promising bioactivities, have been established by interpretation of their NMR and electronic circular dichroism spectra and confirmed by analysis of single-crystal X-ray diffraction data. The chemical shift of the H-6' (1)H NMR resonance has been found to be an indicator of either a cis or trans C/D ring system. In the present study, four structures representing the central rings of a cis-, a trans-, a dehydro-, and an oxadehydro-rotenoid have been plotted using the Mercury program based on X-ray crystal structures reported previously, with the conformations of the C/D ring system, the local bond lengths or interatomic distances, hydrogen bond angles, and the H-6' chemical shift of these compounds presented...
April 20, 2017: Planta Medica
https://www.readbyqxmd.com/read/28425027/10-year-results-of-on-x-bileaflet-mechanical-heart-valve-in-the-aortic-position-low-target-inr-regimen-in-japanese
#2
Hideki Teshima, Masahiko Ikebuchi, Yosuke Miyamoto, Ryuta Tai, Toshikazu Sano, Yusuke Kinugasa, Hiroyuki Irie
OBJECTIVES: This study was designed to establish clinical outcomes after aortic valve replacement (AVR) with On-X bileaflet mechanical heart valve. METHODS: Between 2006 and 2014, AVR was performed to 686 patients. Of them, 78 patients using On-X valve were enrolled. The mean age was 65 ± 11 years (ranged 33-85); 65% were men; and 81% were in sinus rhythm preoperatively. Calcific or degenerative tricuspid aortic valve was present in 73%. Concomitant procedures included coronary artery bypass grafting (22%), Bentall (8%), mitral valve procedure (3%) and other (9%)...
April 19, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28421602/the-qualitative-f-ratio-method-applied-to-electron-channelling-induced-x-ray-imaging-with-an-annular-silicon-drift-detector-in-a-scanning-electron-microscope-in-the-transmission-mode
#3
Nicolas Brodusch, Raynald Gauvin
Electron channelling is known to affect the x-ray production when an accelerated electron beam is applied to a crystalline material and is highly dependent on the local crystal orientation. This effect, unless very long counting time are used, is barely noticeable on x-ray energy spectra recorded with conventional silicon drift detectors (SDD) located at a small elevation angle. However, the very high count rates provided by the new commercially available annular SDDs permit now to observe this effect routinely and may, in some circumstances, hide the true elemental x-ray variations due to the local true specimen composition...
April 18, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28420912/effectiveness-of-plain-x-ray-in-detection-of-fish-and-chicken-bone-foreign-body-in-upper-aerodigestive-tract
#4
Talha Ahmed Qureshi, Muhammad Sohail Awan, Muntazir Hussain, Muhammad Wasif
OBJECTIVE: To assess the use of plain film radiology in the detection of fish and chicken bones in the upper aerodigestive tract. METHODS: This retrospective chart review was conducted at the Aga Khan University Hospital, Karachi, and comprised medical charts of patients who had undergone oesophagoscopy for removal of fish and chicken bone from 1990 to 2015.SPSS 19 was used for data analysis. RESULTS: Of the 24 patients, foreign body was detected on X-ray in 7(29...
April 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28414356/sensitivity-study-of-x-ray-luminescence-computed-tomography
#5
Michael C Lun, Wei Zhang, Changqing Li
X-ray luminescence computed tomography (XLCT) is a hybrid molecular imaging modality that combines the merits of both x-ray imaging (high resolution) and optical imaging (high sensitivity). In this study, we have evaluated the sensitivity of XLCT with phantom experiments by scanning targets of different phosphor concentrations at different depths. We found that XLCT is capable of imaging targets of very low concentrations (27.6 μM or 0.01 mg/mL) at significant depths, such as 21 mm. Our results demonstrate that there is little variation in the reconstructed target size with a maximum target size error of 4...
April 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/28413299/congenital-pouch-colon
#6
REVIEW
Rajiv Chadha, Niyaz Ahmed Khan
Congenital pouch colon (CPC) is an unusual abnormality in which a pouch-like dilatation of a shortened colon is associated with an anorectal malformation. It is categorized into four subtypes (Types I-IV) based on the length of normal colon proximal to the colonic pouch. In males, the pouch usually terminates in a colovesical fistula just proximal to the bladder neck. In girls, the terminal fistula opens either into the urethra or in the vestibule, close to the urethral opening. Girls usually have a double vagina with a wide inter-vaginal bridge, a monocornuate uterus on each side, and urinary incontinence due to a widely open bladder neck...
April 2017: Journal of Indian Association of Pediatric Surgeons
https://www.readbyqxmd.com/read/28389854/a-reduced-12-joint-ultrasound-examination-predicts-lack-of-x-ray-progression-better-than-clinical-remission-criteria-in-patients-with-rheumatoid-arthritis
#7
Eugenio de Miguel, Angela Pecondón-Español, Manuel Castaño-Sánchez, Alfonso Corrales, Ricardo Gutierrez-Polo, Manuel Rodriguez-Gomez, Jose A Pinto-Tasende, Jose L Rivas, José Ivorra-Cortés
To study the predictive value of clinical remission definitions and ultrasound (US) examination on X-ray progression in rheumatoid arthritis (RA). This was an observational prospective multicenter 1-year follow-up cohort of RA patients with moderate disease activity (3.2 < DAS28 ≤ 5.1) who started anti-TNF therapy. DAS28ESR, DAS28CRP, SDAI, CDAI, and ACR/EULAR remission criteria were applied and reduced 12-joint US examination was performed at baseline and at 6 and 12 months. At baseline and month 12, radiographs of hands and feet were obtained in a subset of patients...
April 7, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28387501/unraveling-the-issue-of-ag-migration-in-printable-source-drain-electrodes-compatible-with-versatile-solution-processed-oxide-semiconductors-for-printed-thin-film-transistor-applications
#8
Gyu Ri Hong, Sun Sook Lee, Hye Jin Park, Yejin Jo, Ju Young Kim, Hoi Sung Lee, Yun Chan Kang, Beyong-Hwan Ryu, Aeran Song, Kwun-Bum Chung, Youngmin Choi, Sunho Jeong
In recent decades, solution-processable, printable oxide thin-film transistors have garnered a tremendous amount of attention given their potential for use in low-cost, large-area electronics. However, printable metallic source/drain electrodes undergo undesirable electrical/thermal migration at an interfacial stack of the oxide semiconductor and metal electrode. In this study, we report oleic acid-capped Ag nanoparticles that effectively suppress the significant Ag migration and facilitate high field-effect mobilities in oxide transistors...
April 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28386289/sodium-tanshinone-iia-sulfonate-prevents-radiation-induced-toxicity-in-h9c2-cardiomyocytes
#9
Wenjing Zhang, Yi Li, Rui Li, Yaya Wang, Mengwen Zhu, Bowen Wang, Yanling Li, Dongyun Li, Ping Xie, Bin Liu
The present study was designed to elucidate the key parameters associated with X-ray radiation induced oxidative stress and the effects of STS on X-ray-induced toxicity in H9c2 cardiomyocytes. Cytotoxicity of STS and radiation was assessed by MTT. Antioxidant activity was evaluated by SOD and MDA. Apoptosis was measured by the flow cytometry, Hoechst 33258, clonogenic survival assay, and western blot. It was found that the cell viability of H9c2 cells exposed to X-ray radiation was significantly decreased in a dose-dependent manner and was associated with cell cycle arrest at the G0/G1 phase as well as apoptosis...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28379710/exotic-property-of-azobenzene-sulfonic-photoalignment-material-based-on-relative-humidity
#10
Yue Shi, Chenxiang Zhao, Jacob Yeuk-Lung Ho, Valery V Vashchenko, Abhishek Kumar Srivastava, Vladimir G Chigrinov, Hoi-Sing Kwok, Feng Song, Dan Luo
Azobenzene photoalignment materials are highly effective for liquid crystal alignment with high sensitivity and rewritability. A strong relationship between relative humidity and the alignment quality of a thin layer of azobenzene sulfonic dye has been investigated, where the photo-induced phase retardation, order parameter and anchoring strength of the alignment layer are influenced dramatically by relative humidity. Our results provide fabrication guidance for the photoalignment process in both display and photonic applications...
April 5, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28378702/-a-man-with-a-primary-diffuse-b-cell-lymphoma-of-the-bone
#11
V H M Wanrooij, K S G Jie
A 63-year-old man suffered from persistent pain in the left knee that did not respond to local injections with bupivacaine and triamcinolone acetonide. The first X-ray of the knee did not show any abnormalities, but eight months later a lytic lesion in the left tibia was seen on X-ray. A PET/CT scan and histopathologic analysis of a biopsy revealed a primary diffuse B-cell lymphoma of the bone.
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28374128/cage-deviation-in-the-subaxial-cervical-spine-in-relation-to-implant-position-in-the-sagittal-plane
#12
Klaus Christian Mende, Sven Oliver Eicker, Friedrich Weber
Subsidence of interbody cages is a frequently observed and relevant complication in anterior cervical discectomy and fusion (ACDF). Only a handful of studies concentrated on the modality of subsidence and its clinical impact. We performed a retrospective analysis of ACDF patients from 2004 to 2010. Numeric analog scale (NAS) score pre-op and post-op, Oswestry Disability Index (ODI) on x-rays, endplate (EP) and cage dimensions, implant position, lordotic/kyphotic subsidence patterns (>5°), and cervical alignment were recorded...
April 4, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28357183/tuberculosis-and-guillain-barre-syndrome-a-chance-association
#13
Srikant Mohta, Manish Soneja, Surabhi Vyas, Wasim Khot
An 18-year-old boy presented with acute-onset quadriparesis that had developed 4 weeks prior. He had an intermittent fever and significant weight loss during this period. After extensive investigations, the patient was diagnosed with an acute motor and sensory axonal neuropathy (AMSAN) variant of Guillain-Barre syndrome (GBS) and disseminated tuberculosis with mediastinal lymphadenopathy, pericarditis, and pleural effusion. Plasmapheresis was performed and first-line anti-tubercular therapy was administered...
February 2017: Intractable & Rare Diseases Research
https://www.readbyqxmd.com/read/28356734/therapeutic-effects-of-proteoliposomes-on-x-linked-chronic-granulomatous-disease-proof-of-concept-using-macrophages-differentiated-from-patient-specific-induced-pluripotent-stem-cells
#14
Julie Brault, Guillaume Vaganay, Aline Le Roy, Jean-Luc Lenormand, Sandra Cortes, Marie José Stasia
Chronic granulomatous disease (CGD) is a rare inherited immunodeficiency due to dysfunction of the phagocytic nicotinamide adenine dinucleotide phosphate (NADPH) oxidase complex leading to severe and recurrent infections in early childhood. The main genetic form is the X-linked CGD leading to the absence of cytochrome b558 composed of NOX2 and p22 (phox) , the membrane partners of the NADPH oxidase complex. The first cause of death of CGD patients is pulmonary infections. Recombinant proteoliposome-based therapy is an emerging and innovative approach for membrane protein delivery, which could be an alternative local, targeted treatment to fight lung infections in CGD patients...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28340976/population-genetic-data-for-12-x-str-loci-in-the-northern-han-chinese-and-statsx-package-as-tools-for-population-statistics-on-x-str
#15
Fei Guo
The X-chromosomal short tandem repeat (X-STR) has the advantage in female traces identification against male contamination and in complex kinship cases. In this study, a total of 516 Northern Han Chinese were genotyped using the Investigator(®) Argus X-12 QS Kit and pairwise genetic distances (FST) were measured between Northern Han Chinese and 35 published populations using the same 12 X-STR loci in four presumed linkage groups (LG). Meanwhile, the StatsX package was compiled to aid the analysis of population statistics on X-STR...
January 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28327166/arthroscopic-findings-of-a-diagnostic-dilemma-hip-pathology-with-normal-imaging
#16
Joel Glenn Buikstra, Camdon Fary, Phong Tran
BACKGROUND: Patients with groin, hip and pelvic pain but normal findings on MRI and minimal changes on x-ray can be a diagnostic problem. This paper looks at the arthroscopic findings of patients who have had hip pain and a positive response to an intra-articular anaesthetic but have non-contributory imaging. We hypothesized that standard MRI's were missing significant pathology and if there was a response to intra-articular local anaesthesia, pathology found during arthroscopy was likely...
March 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28325425/treatment-of-scaphotrapeziotrapezoid-osteoarthritis-with-the-pyrocardan-%C3%A2-implant-results-with-a-minimum-follow-up-of-2-years
#17
E Gauthier, M-V Truffandier, E Gaisne, P Bellemère
The aim of this study was to report the results of arthroplasty using a mobile pyrocarbon implant (Pyrocardan(®)) for isolated scaphotrapeziotrapezoid (STT) osteoarthritis. The hypothesis was that this arthroplasty leads to functional improvement without carpal instability. Twenty patients (22 implants) were included with a minimum follow-up of 2 years and an average age of 59.6 years. Outcome criteria were pain (VAS scale), QuickDASH and PRWE scores, strength (grip and pinch), wrist mobility, the Kapandji index, carpal height and the capitolunar angle measured on X-rays...
April 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28323692/hyperlordosis-is-associated-with-facet-joint-pathology-at-the-lower-lumbar-spine
#18
Thorsten Jentzsch, James Geiger, Matthias A König, Clément M L Werner
STUDY DESIGN: A retrospective study. OBJECTIVE: Our study opted to clarify the remaining issues of lumbar lordosis (LL) with regard to (1) its physiological values, (2) age, (3) sex, and (4) facet joint (FJ) arthritis and orientation using computed tomography (CT) scans. SUMMARY OF BACKGROUND DATA: Recent studies have questioned whether LL really decreases with age, but study sample sizes have been rather small and mostly been based on x-rays...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28323691/mri-may-serve-as-a-valid-alternative-to-standing-radiography-in-evaluating-the-sagittal-alignment-of-the-upper-thoracic-spine
#19
Fei Wang, Xu Sun, Saihu Mao, Zhen Liu, Jun Qiao, Feng Zhu, Zezhang Zhu, Tao Pan, Ling Chen, Qinghua Zhao, Yong Qiu
STUDY DESIGN: This study is of a retrospective radiographic design. OBJECTIVE: The objective of the study was to compare supine magnetic resonance images (MRI) with standing x-ray scanning in the evaluation of the sagittal alignment of the upper thoracic spine. SUMMARY OF BACKGROUND DATA: X-ray films have been reported to be inaccurate in evaluating the proximal thoracic sagittal alignment because of poor visibility of the upper thoracic region...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28315662/insights-into-the-establishment-of-chromatin-states-in-pluripotent-cells-from-studies-of-x-inactivation
#20
REVIEW
Andreas Postlmayr, Anton Wutz
Animal development entails the sequential and coordinated specialisation of cells. During cell differentiation transcription factors, cell signalling pathways and chromatin associated protein complexes cooperate in regulating the expression of a large number of genes. Here we review the present understanding of the establishment of chromatin states by focusing on X chromosome inactivation (XCI) as a model for facultative heterochromatin formation in female embryonic cells. The inactive X chromosome (Xi) is large enough to be investigated by biochenical and microscopy techniques...
March 15, 2017: Journal of Molecular Biology
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