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Nicolás A Grosso-Giordano, Christian Schroeder, Alexander Okrut, Andrew Solovyov, Christian Schöttle, Walter Chassé, Nebojsa Marinković, Hubert Koller, Stacey I Zones, Alexander Katz
The effect of outer-sphere environment on alkene epoxidation catalysis using an organic hydroperox-ide oxidant is demonstrated for calix[4]arene-TiIV single-sites grafted on amorphous vs. crystalline delaminated zeotype (UCB-4) silicates as supports. A chelating calix[4]arene macrocycle ligand enforc-es a constant TiIV inner-sphere, as characterized by UV-visible and X-ray absorption spectroscopies, thus enabling the rigorous comparison of outer-sphere environments across different siliceous supports. These outer-sphere environments are characterized by solid-state1 H NMR spectroscopy to comprise proximally organized silanols confined within 12-membered-ring cups in crystalline UCB-4, and are responsible for up to 5-fold enhance-ments in rates of epoxidation by TiIV centers...
March 22, 2018: Journal of the American Chemical Society
Weon-Yoo Kim, Myung-Sup Ko, Se-Won Lee, Kwang-Sub Kim
Purpose: This study characterizes the short-term outcomes of ceramic coated metal-on-metal (MoM) large head total hip arthroplasty (THA) in prospectively selected patients aged 70 to 75 years. Materials and Methods: Eighteen patients (18 hips) between the ages of 70 and 75-years old with THA using ceramic-coated MoM large heads between June 2014 and December 2014 were evaluated. We prospectively selected patients younger than 70 years for bipolar hemiarthroplasty and older than 75 years for conventional THA...
March 2018: Hip & Pelvis
Ozge Yabas Kiziloglu, Okan Toygar, Baha Toygar, Ali Murat Hacimustafaoglu
To determine normal values, repeatability, and interocular symmetry of optic nerve head measurements, three spectral-domain optical coherence tomography (SD-OCT) scans were obtained from 128 healthy Turkish children aged 5-17 years consecutively and prospectively. The mean disc area, rim area, cup volume, cup to disc area ratio, and vertical and horizontal cup to disc ratios were 2.30 ± 0.42 mm2 , 1.84 ± 0.45 mm2 , 0.09 ± 0.10 mm3 , 0.20 ± 0.13, 0.37 ± 0.17, and 0.45 ± 0.20, respectively. The intraclass correlation coefficients were >0...
April 2018: Neuro-ophthalmology
Ahmad Khatoun, Jolien Breukers, Sara Op de Beeck, Ioana Gabriela Nica, Jean-Marie Aerts, Laura Seynaeve, Tom Haeck, Boateng Asamoah, Myles Mc Laughlin
Transcranial alternating current stimulation (tACS) is a noninvasive neuromodulation method that can entrain physiological tremor in healthy volunteers. We conducted two experiments to investigate the effectiveness of high-amplitude and focused tACS montages at entraining physiological tremor. Experiment 1 used saline-soaked sponge electrodes with an extra-cephalic return electrode and compared the effects of a motor (MC) and prefrontal cortex (PFC) electrode location. Average peak-amplitude was 1.925 mA...
March 21, 2018: Scientific Reports
X Q Wang, C S Wu, S Sun, J Wang, W Li, W Zhang
Objective: To investigate the situation of hip dislocation with the application of "femur first" principle and "combined anteversion technique" during total hip arthroplasty. Methods: A retrospective analysis has been done on the clinical data about 104 patients(133 hips)who were diagnosed as hip disease and were treated with total hip arthroplasty by the doctors from the Department of Joint Orthorpaedics of Shandong Provincial Hospital Affiliated to Shandong University from June 2014 to June 2016, and all the prostheses applied in the operation were cementless ones...
April 1, 2018: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
Erin Honcharuk, Stephen Kayiaros, Lee E Rubin
Addressing acetabular bone defects can be difficult and depends on the amount of bone loss. Augments, either with bone or highly porous metals, are options that still allow the use of a hemispherical cup. Almost all previous research and publication on acetabular augments have focused on revision hip arthroplasty utilizing either a modified lateral or a posterolateral surgical approach. We describe 3 cases of augmenting acetabular bone defects through a direct anterior approach for primary total hip arthroplasty...
March 2018: Arthroplasty Today
Matthias Gilgien, Josef Kröll, Jörg Spörri, Philip Crivelli, Erich Müller
External forces, such as ground reaction force or air drag acting on athletes' bodies in sports, determine the sport-specific demands on athletes' physical fitness. In order to establish appropriate physical conditioning regimes, which adequately prepare athletes for the loads and physical demands occurring in their sports and help reduce the risk of injury, sport-and/or discipline-specific knowledge of the external forces is needed. However, due to methodological shortcomings in biomechanical research, data comprehensively describing the external forces that occur in alpine super-G (SG) and downhill (DH) are so far lacking...
2018: Frontiers in Physiology
Abdulaziz Anazi Alshamrani, Sami Al-Shahwan
BACKGROUND: Crouzon syndrome is the most common form of craniosynostosis, and mutations in the fibroblast growth factor receptor 2 and 3 (FGFR2 and FGFR3) genes are implicated in its pathogenesis. OBSERVATION: A 10-year-old female patient with Crouzon syndrome and congenital glaucoma treated with trabeculectomy and ocular hypotensive medications was examined. The patient had proptosis, exposure keratopathy, megalocornea, thin central corneal thickness, a shallow anterior chamber, mild anterior subcapsular cataract, and a cup-to-disc ratio of 0...
March 19, 2018: Journal of Glaucoma
Chun-Yuan Chen, Shan-Shan Rao, Lu Ren, Xiong-Ke Hu, Yi-Juan Tan, Yin Hu, Juan Luo, Yi-Wei Liu, Hao Yin, Jie Huang, Jia Cao, Zhen-Xing Wang, Zheng-Zhao Liu, Hao-Ming Liu, Si-Yuan Tang, Ran Xu, Hui Xie
Chronic non-healing wounds represent one of the most common complications of diabetes and need advanced treatment strategies. Exosomes are key mediators of cell paracrine action and can be directly utilized as therapeutic agents for tissue repair and regeneration. Here, we explored the effects of exosomes from human urine-derived stem cells (USC-Exos) on diabetic wound healing and the underlying mechanism. Methods: USCs were characterized by flow cytometry and multipotent differentiation potential analyses...
2018: Theranostics
Lauren E Au, Klara Gurzo, Wendi Gosliner, Karen L Webb, Patricia B Crawford, Lorrene D Ritchie
BACKGROUND: Research on the association between school meal consumption and overall dietary intake post-Healthy Hunger-Free Kids Act implementation is limited. OBJECTIVE: This study examines the association between frequency of participating in the National School Lunch and School Breakfast Programs and children's dietary intakes. DESIGN: The Healthy Communities Study was a cross-sectional observational study conducted between 2013 and 2015...
March 16, 2018: Journal of the Academy of Nutrition and Dietetics
Rifka C Derman, Carrie R Ferrario
Efforts to stem the global rise in obesity have been minimally effective, perhaps in part because our understanding of the psychological and behavioral drivers of obesity is limited. It is well established that stimuli that are paired with palatable foods can powerfully influence food-seeking and feeding behaviors. However, how consumption of sugary, fatty "junk-foods" affects these motivational responses to food cues is poorly understood. Here, we determined the effects of short- and long-term "junk-food" consumption on the expression of cue potentiated feeding and conditioned food cup approach to Pavlovian conditioned stimuli (CS)...
March 16, 2018: Physiology & Behavior
Holger Schultheis, Laura A Carlson
Mapping spatial expressions such as "behind the cup" to a spatial region requires two processes that have been largely explored independently: reference frame selection and spatial term assignment (Logan & Sadler, 1996). Reference frame selection carves a space into regions. Spatial term assignment evaluates these regions by determining the acceptability of the term for the given configuration. Here we present a systematic investigation of the relation and interplay of these two processes by asking whether (a) information from spatial term assignment feeds back to selection and (b) whether competition during selection is graded...
March 16, 2018: Cognition
Na Xu, Jun Chu, Min Wang, Ling Chen, Liang Zhang, Zhongwen Xie, Jinsong Zhang, Chi-Tang Ho, Daxiang Li, Xiaochun Wan
Large yellow tea is a traditional beverage in China with unique toasty flavor. Preliminary study using 3T3-L1 cells indicted that large yellow tea, possessed more potent lipid-lowering efficacy than green, black, dark and white teas. In the present study we further investigated its influence on metabolic syndrome in high-fat diet (HFD) mouse model with an emphasis on dose response. Thirty-two C57BL/6 male mice were randomly divided into 4 groups: low-fat diet (LFD), HFD, HFD+2.5% large yellow tea hot-water extract (YT, equivalent to 10 cups of tea daily for humans), HFD+0...
March 19, 2018: Journal of Agricultural and Food Chemistry
May A Beydoun, Marie T Fanelli-Kuczmarski, Hind A Beydoun, Greg A Dore, Jose A Canas, Michele K Evans, Alan B Zonderman
The role of dairy foods and related nutrients in cardiometabolic health aetiology is poorly understood. We investigated longitudinal associations between the metabolic syndrome (MetS) and its components with key dairy product exposures. We used prospective data from a bi-racial cohort of urban adults (30-64 years at baseline (n 1371)), the Healthy Aging in Neighborhoods of Diversity across the Life Span (HANDLS), in Baltimore City, MD (2004-2013). The average of two 24-h dietary recalls measured 4-10 d apart was computed at baseline (V1) and follow-up (V2) waves...
March 2018: British Journal of Nutrition
Jia Ning, XinYue Cui, XiangNan Kong, YiFei Tang, Riana Wulandari, Lu Chen, Sebas Wesseling, Ivonne M C M Rietjens
In the present study, a risk assessment of plant food supplements (PFS), traditional Chinese medicines (TCM) and herbal teas containing alkenylbenzenes was performed using the Margin of Exposure (MOE) approach. The levels of alkenylbenzenes in botanical preparations collected on the Chinese market were quantified and the combined estimated daily intake (EDI) was determined using dose additivity. The combined EDI values obtained assuming equal potency of all alkenylbenzenes detected in the PFS, TCM and herbal teas were 0...
March 15, 2018: Food and Chemical Toxicology
Dandan Han, Lanying Wang, Yanping Luo
Actinomycetes are an important group of gram-positive bacteria that play an essential role in the rhizosphere ecosystem. The confrontation culture and Oxford cup method were used to evaluate the antagonistic activities of strains, which were isolated from the rhizosphere soil of Mikania micrantha. The two isolates were identified using morphological and physiological tests combined with 16S rRNA-based molecular analysis, respectively. The type I polyketone synthase (PKS-I) was amplified. The constituents of fermentation metabolites were analyzed by gas chromatography mass spectrometry...
March 2018: Microbiological Research
Melanie K Bean, Bethany Brady Spalding, Elizabeth Theriault, Kayla-Brooke Dransfield, Alexandra Sova, Mary Dunne Stewart
OBJECTIVE: To evaluate the 1-month impact of salad bars on fruit and vegetable (FV) selection, intake, and waste. DESIGN: Pre-post quasi-experimental design. SETTING: Title I elementary schools in a large, urban district in central Virginia. PARTICIPANTS: Students (grades 1-5; >95% African American) from 2 elementary schools participated in plate waste assessments (282 plates were rated at baseline, 443 at post-assessment); fourth- and fifth-grade students from 15 (of 18 eligible) schools (n = 1,193) responded to surveys...
March 14, 2018: Journal of Nutrition Education and Behavior
Marcos D Machado-Fragua, Ellen A Struijk, Auxiliadora Graciani, Pilar Guallar-Castillon, Fernando Rodríguez-Artalejo, Esther Lopez-Garcia
PURPOSE: Habitual coffee consumption has been associated with lower risk of type 2 diabetes and cardiovascular disease. Since these diseases are main determinants of functional limitations, we have tested the hypothesis that coffee intake is associated with lower risk of physical function impairment, frailty and disability in older adults. We focused on women and those with obesity, hypertension or type 2 diabetes because they are at higher risk of functional limitations. METHODS: Prospective study with 3289 individuals ≥ 60 years from the Seniors-ENRICA cohort...
March 16, 2018: European Journal of Nutrition
Bartosz Baran, Michał Krzyżowski, Mikołaj Cup, Jakub Janiec, Mateusz Grabowski, Jacek Francikowski
Volatile fatty acids (VFAs) are a group of common metabolites and semiochemicals mediating information transfer between higher organisms and bacteria, either from microbiome or external environment. VFAs commonly occur among various insect orders. There are numerous studies exploring their influence on the behavior of different insect species. In relation to the papers published by J. E. McFarlane in 1985, we assessed the effects of formic, acetic, propionic, butyric and valeric acids on the spatial preference of the lesser mealworm ( Alphitobius diaperinus ), a common pest of stored food grain products and the poultry industry...
March 16, 2018: Insects
Saverio Affatato, Alessandro Ruggiero, Sami Abdel Jaber, Massimiliano Merola, Pierangiola Bracco
Given the long-term problem of polyethylene wear, medical interest in the new improved cross-linked polyethylene (XLPE), with or without the adding of vitamin E, has risen. The main aim of this study is to gain further insights into the mutual effects of radiation cross-linking and addition of vitamin E on the wear performance of ultra-high-molecular-weight polyethylene (UHMWPE). We tested four different batches of polyethylene (namely, a standard one, a vitamin E-stabilized, and two cross-linked) in a hip joint simulator for five million cycles where bovine calf serum was used as lubricant...
March 16, 2018: Materials
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