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https://www.readbyqxmd.com/read/29228060/model-of-hindlimb-unloading-in-adult-female-rats-characterizing-bone-physicochemical-microstructural-and-biomechanical-properties
#1
Melise Jacon Peres-Ueno, Camila Tami Stringhetta-Garcia, Robson Chacon Castoldi, Guilherme Akio Tamura Ozaki, Antônio Hernandes Chaves-Neto, Rita Cássia Menegati Dornelles, Mário Jefferson Quirino Louzada
Prolonged bedrest and microgravity induce alterations to bone, leading to bone fragility and compromising the quality of life. In this study, we characterized the physicochemical changes, microstructure, and biomechanics of the femurs of female adult rats in response to hindlimb unloading for 21 days. Twenty 6-month-old Wistar female rats were distributed into control (CON) and hindlimb unloading (HLU) groups. Analysis the in vivo bone mineral density (BMD) by dual energy x-ray absorptiometry (DXA) from the femurs was performed at the beginning and end of the experiment; plasma levels of calcium, phosphorus, and alkaline phosphatase, tartrate-resistant acid phosphatase activity, assessed by spectrophotometry, and estradiol, measured by enzyme-linked immunosorbent assay, was performed after the experiment...
2017: PloS One
https://www.readbyqxmd.com/read/29227935/hematite-%C3%AE-fe2o3-a-potential-ce4-carrier-in-red-mud
#2
Ralph M Bolanz, Stefan Kiefer, Jörg Göttlicher, Ralph Steininger
Cerium is the most abundant rare earth element (REE) within the waste product of alumina production (red mud), but its speciation in this complex material is still barely understood. Previous studies showed evidence for a correlation between Ce and the main constituent of red mud, iron oxides, which led us to investigate the most abundant iron oxide in red mud, hematite, as possible carrier phase for Ce. Synthetic hematite can incorporate up to 1.70±0.01wt% Ce, which leads to a systematical increase of all unit cell parameters...
December 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29227923/in-vitro-leishmanicidal-and-trypanocidal-evaluation-and-magnetic-properties-of-7-amino-1-2-4-triazolo-1-5-a-pyrimidine-cu-ii-complexes
#3
J M Méndez-Arriaga, I Oyarzabal, G Escolano, A Rodríguez-Diéguez, M Sánchez-Moreno, J M Salas
Two triazolopyrimidine complexes have been obtained from reaction between 7-amino-1,2,4-triazolo[1,5-a]pyrimidine (7atp) and Cu (II) salts. Crystal structures of [Cu2(μ-7atp)4Cl2]Cl2·4H2O (1) and [Cu2(μ-7atp)4(H2O)2](NO3)4·H2O (2) have been studied by X-ray diffraction methods and characterized by spectroscopic and thermal analysis. Magnetic studies of these dinuclear complexes have revealed the existence of moderate antiferromagnetic interactions between the copper ions, with J values of -91.2 and -96...
December 2, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29227565/limited-utility-of-routine-chest-x-ray-in-initial-evaluation-of-neutropenic-fever-in-patients-with-haematological-diseases-undergoing-chemotherapy
#4
Ortis Estacio, Zoe Loh, Amy Baker, Geoff Chong, Andrew Grigg, Leonid Churilov, Eliza A Hawkes
BACKGROUND: Routine chest X-Ray (CXR) is recommended for neutropenic fever(NF) management however its role is relatively understudied in haematology patients. METHODS: Retrospective, single-centre analysis of haematology patients admitted with NF between January 2011-December 2015. Baseline demographics, treatment details and outcomes were collected from electronic patient records. CXRs underwent independent radiology review. Primary endpoints were proportion of NF episodes in which CXR detected a probable chest infection in the absence of respiratory symptoms/signs, and/or resulted in a change in antibiotic management...
December 11, 2017: Internal Medicine Journal
https://www.readbyqxmd.com/read/29227533/functional-magnetic-nanoparticles-for-highly-efficient-cholesterol-removal
#5
Jun Sun, Bin Xu, Yaoyao Mu, Haile Ma, Wenjuan Qu
In this study, magnetic nanoparticles functionalized with carboxylated β-cyclodextrin (CM-β-CD; referred to Fe3 O4 @CM-β-CD) were synthesized and used for the efficient removal of cholesterol from milk and egg yolk via host-guest interactions. The results of Fourier-transform infrared, X-ray photoelectron spectroscopy, and thermogravimetric analysis indicated that the CM-β-CD was successfully conjugated to the surface of Fe3 O4 , and the amount of CM-β-CD attached on Fe3 O4 @CM-β-CD was determined to be 9...
December 11, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/29227160/inter-and-intra-examiner-reliability-of-bitewing-radiography-and-near-infrared-light-transillumination-for-proximal-caries-detection-and-assessment
#6
Friederike Litzenburger, Katrin Heck, Vinay Pitchika, Klaus W Neuhaus, Fabian N Jost, Reinhard Hickel, Anahita Jablonski-Momeni, Alexander Welk, Alexander Lederer, Jan Kühnisch
OBJECTIVES: The purpose of this in vitro study was to evaluate the inter- and intra-examiner reliability of digital bitewing (DBW) radiography and near-infrared light transillumination (NIRT) for proximal caries detection and assessment in posterior teeth. METHODS: From a pool of 85 patients, 100 corresponding pairs of DBW and NIRT images (~1/3 healthy, ~1/3 with enamel caries and ~1/3 with dentin caries) were chosen. Twelve dentists with different professional statuses and clinical experience repeated the evaluation in two blinded cycles...
December 11, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29227156/the-characterization-of-biosignatures-in-caves-using-an-instrument-suite
#7
Kyle Uckert, Nancy J Chanover, Stephanie Getty, David G Voelz, William B Brinckerhoff, Nancy McMillan, Xifeng Xiao, Penelope J Boston, Xiang Li, Amy McAdam, David A Glenar, Arriana Chavez
The search for life and habitable environments on other Solar System bodies is a major motivator for planetary exploration. Due to the difficulty and significance of detecting extant or extinct extraterrestrial life in situ, several independent measurements from multiple instrument techniques will bolster the community's confidence in making any such claim. We demonstrate the detection of subsurface biosignatures using a suite of instrument techniques including IR reflectance spectroscopy, laser-induced breakdown spectroscopy, and scanning electron microscopy/energy dispersive X-ray spectroscopy...
December 2017: Astrobiology
https://www.readbyqxmd.com/read/29226240/optical-computed-tomography-for-spatially-isotropic-four-dimensional-imaging-of-live-single-cells
#8
Laimonas Kelbauskas, Rishabh Shetty, Bin Cao, Kuo-Chen Wang, Dean Smith, Hong Wang, Shi-Hui Chao, Sandhya Gangaraju, Brian Ashcroft, Margaret Kritzer, Honor Glenn, Roger H Johnson, Deirdre R Meldrum
Quantitative three-dimensional (3D) computed tomography (CT) imaging of living single cells enables orientation-independent morphometric analysis of the intricacies of cellular physiology. Since its invention, x-ray CT has become indispensable in the clinic for diagnostic and prognostic purposes due to its quantitative absorption-based imaging in true 3D that allows objects of interest to be viewed and measured from any orientation. However, x-ray CT has not been useful at the level of single cells because there is insufficient contrast to form an image...
December 2017: Science Advances
https://www.readbyqxmd.com/read/29225968/metabolic-differences-between-dogs-of-different-body-sizes
#9
Rondo P Middleton, Sebastien Lacroix, Marie-Pier Scott-Boyer, Nikola Dordevic, Adam D Kennedy, Amanda R Slusky, Jerome Carayol, Christina Petzinger-Germain, Alison Beloshapka, Jim Kaput
Introduction: The domesticated dog, Canis lupus familiaris, has been selectively bred to produce extreme diversity in phenotype and genotype. Dogs have an immense diversity in weight and height. Specific differences in metabolism have not been characterized in small dogs as compared to larger dogs. Objectives: This study aims to identify metabolic, clinical, and microbiota differences between small and larger dogs. Methods: Gas chromatography/mass spectrometry, liquid chromatography/tandem mass spectrometry, clinical chemistry analysis, dual-energy X-ray absorptiometry, and 16S pyrosequencing were used to characterize blood metabolic, clinical, and fecal microbiome systems, respectively...
2017: Journal of Nutrition and Metabolism
https://www.readbyqxmd.com/read/29225796/synthesis-of-uniform-rare-earth-doped-gd2o2s-sub-micron-sized-spheres-using-gas-aided-sulfurization-and-their-optical-characteristics
#10
Shuqing He, Xinyu Zhao, Mei Chee Tan
In this work, we report a detailed study of the synthesis of sub-micron sized Gd2O2S spheres using a two-step process: (1) amorphous precursor synthesis using the solvothermal method where a surfactant was used to control particle morphology, followed by (2) crystallization to form Gd2O2S polycrystalline spheres in a sulfur-rich environment. The crystallization and sulfurization processes are investigated by monitoring the crystal growth at different temperatures and under different environments using mainly x-ray diffraction and analysis of the precursor's thermal decomposition profile...
2017: RSC Advances
https://www.readbyqxmd.com/read/29225511/the-crystalline-sponge-method-a-solvent-based-strategy-to-facilitate-noncovalent-ordered-trapping-of-solid-and-liquid-organic-compounds
#11
Timothy R Ramadhar, Shao-Liang Zheng, Yu-Sheng Chen, Jon Clardy
A strategy that leverages solvent effects to noncovalently trap solid and unstable liquid organic compounds within a crystalline sponge ({[(ZnI2)3(tris(4-pyridyl)-1,3,5-triazine)2]·x(CHCl3)}n) in a simple, mild, and efficient fashion for target molecule structure determination via X-ray diffraction is disclosed. Host-guest structures were obtained using third-generation synchrotron radiation, and new beamline hardware allowed rapid data collection in ~5-24 minutes. This is 40-90% faster than previously reported crystalline sponge synchrotron datasets collected by us, and approximately a 150-720-fold decrease in time versus using a typical in-house diffractometer, effectively enabling the potential for high-throughput analysis...
August 21, 2017: CrystEngComm
https://www.readbyqxmd.com/read/29225500/multi-scale-mechanics-of-granular-solids-from-grain-resolved-x-ray-measurements
#12
R C Hurley, S A Hall, J P Wright
This work discusses an experimental technique for studying the mechanics of three-dimensional (3D) granular solids. The approach combines 3D X-ray diffraction and X-ray computed tomography to measure grain-resolved strains, kinematics and contact fabric in the bulk of a granular solid, from which continuum strains, grain stresses, interparticle forces and coarse-grained elasto-plastic moduli can be determined. We demonstrate the experimental approach and analysis of selected results on a sample of 1099 stiff, frictional grains undergoing multiple uniaxial compression cycles...
November 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/29225463/nano-copper-bearing-stainless-steel-promotes-fracture-healing-by-accelerating-the-callus-evolution-process
#13
Lei Wang, Guoyuan Li, Ling Ren, Xiangdong Kong, Yugang Wang, Xiuguo Han, Wenbo Jiang, Kerong Dai, Ke Yang, Yongqiang Hao
Treatment for fractures requires internal fixation devices, which are mainly produced from stainless steel or titanium alloy without biological functions. Therefore, we developed a novel nano-copper-bearing stainless steel with nano-sized copper-precipitation (317L-Cu SS). Based on previous studies, this work explores the effect of 317L-Cu SS on fracture healing; that is, proliferation, osteogenic differentiation, osteogenesis-related gene expression, and lysyl oxidase activity of human bone mesenchymal stem cells were detected in vitro...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29225410/conformational-differentiation-of-%C3%AE-cyanohydroxycinnamic-acid-isomers-a-raman-spectroscopic-study
#14
Jayson Vedad, Maciej E Domaradzki, Elmer-Rico E Mojica, Emmanuel J Chang, Adam A Profit, Ruel Z B Desamero
Two α-cyanohydroxycinnamic acid positional isomers, α-cyano-4-hydroxycinnamic acid (CHCA4) and α-cyano-3-hydroxycinnamic acid (CHCA3), were characterized using Raman spectroscopy. We analyzed the implications of the collected Raman spectral shifts, and verified them through other spectroscopic techniques, to arrive at plausible three dimensional structures of CHCA3 and CHCA4. The positions of these groups were mapped by systematically analyzing the orientation and type of interactions functional groups make in each CHCA isomer...
October 2017: Journal of Raman Spectroscopy: JRS
https://www.readbyqxmd.com/read/29224976/body-composition-and-clinical-symptoms-in-patients-with-hip-or-knee-osteoarthritis-results-from-the-khoala-cohort
#15
Clémence Jeanmaire, Bernard Mazières, Evelyne Verrouil, Lorraine Bernard, Francis Guillemin, Anne-Christine Rat
OBJECTIVE: To analyze the associations between body composition, notably low lean mass, and clinical symptoms [pain, physical function, quality of life (QoL)] in patients with symptomatic hip and/or knee OA. METHODS: Cross-sectional study using data from the 3-year follow-up visit of the Knee and Hip OsteoArthritis Long-term assessment (KHOALA) cohort. Skeletal muscle and fat mass were measured by dual X-ray absorptiometry (DXA). Fat mass index (FMI) was defined as total fat mass/height2...
October 18, 2017: Seminars in Arthritis and Rheumatism
https://www.readbyqxmd.com/read/29224378/carotane-type-sesquiterpenes-from-cultures-of-the-insect-pathogenic-fungus-isaria-fumosorosea
#16
Jun Zhang, Sha-Sha Liu, Wei-Yu Yuan, Jing-Jing Wei, You-Xing Zhao, Du-Qiang Luo
Two new carotane-type sesquiterpenes named trichocaranes E (1) and F (2), along with two known ones CAF-603 (3) and trichocarane C (4), were isolated from cultures of the insect pathogenic fungus Isaria fumosorosea. Their structures and relative configurations were elucidated by extensive spectroscopic analysis and X-ray crystallography. Compounds 1-3 showed potent cytotoxic activities against six tumor cell lines MDA, MCF-7, SKOV-3, Hela, A549, HepG2 with IC50 values in a concentration range of 0.1-6.0 μg/ml...
December 10, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/29224021/comparison-of-muscle-mass-indices-using-computed-tomography-or-dual-x-ray-absorptiometry-for-predicting-physical-performance-in-hemodialysis-patients
#17
Seok Hui Kang, Hyun Seok Lee, Sukyung Lee, Ji-Hyung Cho, Jun Chul Kim
BACKGROUND/AIMS: Our study aims to evaluate the association between thigh muscle cross-sectional area (TMA) using computed tomography (CT), or appendicular skeletal muscle mass (ASM) using dual energy X-ray absorptiometry (DEXA), and physical performance levels in hemodialysis (HD) patients. METHODS: Patients were included if they were on HD for ≥6 months (n = 84). ASM and TMA were adjusted to body weight (BW, kg) or height2 (Ht2, m2). Each participant performed a short physical performance battery test (SPPB), a sit-to-stand for 30 second test (STS30), a 6-minute walk test (6-MWT), a timed up and go test (TUG), and hand grip strength (HGS) test...
December 7, 2017: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29223616/three-new-highly-oxygenated-sterols-and-one-new-dihydroisocoumarin-from-the-marine-sponge-derived-fungus-cladosporium-sp-scsio41007
#18
Xiaoyan Pang, Xiuping Lin, Junfeng Wang, Rui Liang, Yongqi Tian, Limbadri Salendra, Xiaowei Luo, Xuefeng Zhou, Bin Yang, Zhengchao Tu, Yonghong Liu
Three new highly oxygenated sterols (1-3) and a new dihydroisocoumarin (7) together with six known compounds were isolated from the extracts of the culture of a sponge-derived fungus Cladosporium sp. SCSIO41007. The structures of all new compounds (1-3, 7) were determined by the extensive spectroscopic analysis including NMR, MS, IR, and UV. Their absolute configurations were determined by X-ray single-crystal and CD data analysis. Compound 2 exhibited weak inhibitory activity against H3N2 with the IC50 value of 16...
December 6, 2017: Steroids
https://www.readbyqxmd.com/read/29223495/estimation-of-spinal-joint-centers-from-external-back-profile-and-anatomical-landmarks
#19
A Nerot, W Skalli, X Wang
Defining a subject-specific model of the human body is required for motion analysis in many fields, such as in ergonomics and clinical applications. However, locating internal joint centers from external characteristics of the body still remains a challenging issue, in particular for the spine. Current methods mostly require a set of rarely accessible (3D back or trunk surface) or operator dependent inputs (large number of palpated landmarks and landmarks-based anthropometrics). Therefore, there is a need to provide an alternative way to estimate joint centers only using a limited number of easily palpable landmarks and the external back profile...
November 20, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29223115/immobilization-of-hexavalent-chromium-in-contaminated-soils-using-biochar-supported-nanoscale-iron-sulfide-composite
#20
Honghong Lyu, Hang Zhao, Jingchun Tang, Yanyan Gong, Yao Huang, Qihang Wu, Bin Gao
Biochar supported carboxymethyl cellulose (CMC)-stabilized nanoscale iron sulfide (FeS) composite (CMC-FeS@biochar) was prepared and tested for immobilization of hexavalent chromium Cr(VI) in soil. Results of UV-vis and transmission electron microscopy (TEM) showed that the backbone of biochar suppressed the aggregation of FeS, resulting in smaller particle size and more sorption sites than bare FeS. The composite at a dosage of 2.5 mg per gram soil displayed an enhanced Cr(VI) immobilization efficiency (a 94...
December 1, 2017: Chemosphere
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