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Integrating biomechanical and motor control principles in elite high jumpers： A transdisciplinary approach to enhancing sport performance

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Journal of Sport and Health Science 2015年第4期4卷 341-346页

作者： James becker Will EW. Wu Department of Kinesiology California State University Long Beach CA 90840 USA

Background： In recent years, there has been a proliferation of technology and sport science utilized within an athlete＇s training, especially at the elite level. However, the sport science is a broad field, encompassing disciplines such as biomechanics, motor control and learning, exercise physiology, sports medicine, sport psychology to name a few. Rarely are these disciplines applied in an integrated manner. The purpose of this study was to document the effectiveness of an integrated biomechanics and motor control protocol for improving athlete＇s performance in the high jump. Methods： Four elite high jumpers performed baseline jumps under no^mal conditions and then jumps using a specific external focus of attention cue designed to improve their running posture. Three-dimensional biomeehanical analysis was used to quantify the upright posture throughout the approach as well as horizontal velocity at plant and vertical velocity at takeoff. Results： The results showed that when using the external focus of attention cue, the jumpers were significantly more upright during the approach, had significantly higher horizontal velocities at plant, and generated significantly greater vertical velocities during the takeoff. Conclusion： The results of this study lay the foundation for future work examining how integrating sport science disciplines can improve performance of elite level athletes.

关键词： Biomechanics High jump Motor control Sport performance

Early gestation chorionic villi-derived stromal cells for fetal tissue engineering

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World Journal of Stem Cells 2015年第1期7卷 195-207页

作者： Lee Lankford Taryn Selby James becker Volodymyr Ryzhuk Connor Long Diana Farmer Aijun Wang Department of Surgery University of California Davis Health System Sacramento CA 95817 United States

AIM: To investigate the potential for early gestation placenta-derived mesenchymal stromal cells(PMSCs) for fetal tissue ***: PMSCs were isolated from early gestation chorionic villus tissue by explant culture. Chorionic villus sampling(CVS)-size tissue samples(mean = 35.93 mg)were used to test the feasibility of obtaining large cell numbers from CVS within a clinically relevant timeframe. We characterized PMSCs isolated from 6 donor placentas by flow cytometry immunophenotyping, multipotency assays, and through immunofluorescent staining. Protein secretion from PMSCs was examined using two cytokine array assays capable of probing for over 70 factors in total. Delivery vehicle compatibility of PMSCs was determined using three common scaffold systems: fibrin glue, collagen hydrogel, and biodegradable nanofibrous scaffolds made from a combination of polylactic acid(PLA) and poly(lactic-co-glycolic acid)(PLGA). Viral transduction of PMSCs was performed using a Luciferase-GFPcontaining lentiviral vector and efficiency of transduction was tested by fluorescent microscopy and flow cytometry ***: We determined that an average of 2.09 × 106(SD ± 8.59 × 105) PMSCs could be obtained from CVS-size tissue samples within 30 d(mean = 27 d, SD ± 2.28), indicating that therapeutic numbers of cells can be rapidly expanded from very limited masses of tissue. Immunophenotyping by flow cytometry demonstrated that PMSCs were positive for MSC markers CD105, CD90, CD73, CD44, and CD29, and were negative for hematopoietic and endothelial markers CD45, CD34, and CD31. PMSCs displayed trilineage differentiation capability, and were found to express developmental transcription factors Sox10 and Sox17 as well as neuralrelated structural proteins NFM, Nestin, and S100 β. Cytokine arrays revealed a robust and extensive profile of PMSC-secreted cytokines and growth factors, and detected 34 factors with spot density values exceeding 103. Detected factors had widely div

关键词： Placenta Mesenchymal stromal cells Chorionicvillus Fetal surgery Tissue engineering

Very early family-based intervention for anxiety:two case studies with toddlers

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General Psychiatry 2019年第6期32卷 349-355页

作者： Dina R Hirshfeld-becker Aude Henin Stephanie J Rapoport Timothy E Wilens Alice S Carter Child CBT Program Department of PsychiatryMassachusetts General HospitalBostonMassachusettsUSA Department of Psychiatry Harvard Medical SchoolBostonMassachusettsUSA Division of Child and Adolescent Psychiatry Department of PsychiatryMassachusetts General HospitalBostonMassachusettsUSA Department of Psychology University of Massachusetts BostonBostonMassachusettsUSA

Anxiety disorders represent the most common categor of psychiatric disorder in children and adolescents and contribute to distress,impairment and *** Anxiety disorders or their temperamental precursors are often evident in early childhood,and anxiety can impair functioning,even during preschool age and in toddlerh A growing number of investigators have shown that anxiety in preschoolers can be treated efficaciously using cognitive-behavioural therapy(CBT)administere either by training the parents to apply CBT strategies with their children or through direct intervention with parents and *** date,most investigators have drawn the line at offering direct CBT to children under the age of ***,since toddlers can also present with impairing symptoms,and since behaviour strategi can be applied in older preschoolers with poor languag ability successfully,it ought to be possible to apply CBT anxiety to younger children as *** therefore prese two cases of very young children with impairing anxiet(ages 26 and 35 months)and illustrate the combinatio parent-only and parent-child CBT sessions that compri their *** treatment was well tolerated by parents and children and showed promise for reducing anxiety symptoms and improving coping skills.

关键词： distress behaviour apply

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What's Wrong

小学生时代（大嘴英语） 2021年第7期 42-43页

作者： Paula becker(图) 不详

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Let's Party

小学生时代（大嘴英语） 2020年第6期 38-39页

作者： Paula becker(图) 不详

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Molecular Plant 2012年第4期5卷 951-954页

作者： Giuseppe Ortu Raffaella Balestrini Patricia A. Pereira Jorg D. becker Helge Kuste Paola Bonfante Department of Life Science and Systems Biology University of Torino Italy Istituto per la Protezione delle Piante--CNR Torino Italy Instituto Gulbenkian de Ciencia 2780-156 Oeiras Portugal Institut for Pflanzengenetik Leibniz Universitat Hannover Herrenhauser Str. 2 D-30419 Hannover Germany

Dear Editor, Phytohormones are essential regulators of plant develop- ment, but their role in the signaling processes between plants and fungi during arbuscular mycorrhizal （AM） establishment is far from being understood （Ludwig-M011er, 2010）. AM coloni- zation leads to extensive effects on host metabolism, as revealed by transcriptome studies of AM plants （Hogekamp et al., 2011）. Some genes have been specified as an AM core set, since they are mycorrhizal-responsive, irrespective of the identity of the plant,

关键词： AM真菌植物激素相关基因早期阶段调节过程生物合成相互作用赤霉素

Quantum-orbit theory of low-energy above-threshold ionization on and off axis

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Chinese Optics Letters 2015年第7期13卷 18-22页

作者： W.becker D.B.Miloevi Max-Born-Institut Faculty of Science University of Sarajevo Academy of Sciences and Arts of Bosnia and Herzegovina

Intense-laser-induced above-threshold ionization of a bound electron into continuum states with low energy is investigated in the context of the strong-field approximation that allows for one act of rescattering of the re- visiting electron. The quantum orbits for forward and backward scattering are evaluated and generalized to arbitrary scattering angles. The velocity map of the liberated electron exhibits the well-known low-energy structure as well as other features off the polarization axis.

关键词： Quantum-orbit theory of low-energy above-threshold ionization on and off axis

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细胞型DNA特异结合蛋白的快速分离

中国医学科学院学报 1990年第2期12卷 105-109页

作者：王智 F.F.becker 中国医学科学院基础医学研究所美国德州大学肿瘤研究所

本文建立了一个改良的凝胶洗脱法,用以分离细胞型DNA特异结合蛋白质。采用小型平板SDS凝胶电泳分离和银染鉴定,用硝酸纤维素滤膜结合法和迁移率改变法检测DNA活性。此法具有快速、经济和保留DNA活性等优点,适用于分离纯化象细胞型DNA特... 详细信息

本文建立了一个改良的凝胶洗脱法,用以分离细胞型DNA特异结合蛋白质。采用小型平板SDS凝胶电泳分离和银染鉴定,用硝酸纤维素滤膜结合法和迁移率改变法检测DNA活性。此法具有快速、经济和保留DNA活性等优点,适用于分离纯化象细胞型DNA特异结合这样含量极微的蛋白质。

关键词：凝胶洗脱分离结合蛋白质 DNA

Molecular Modeling of Cell Adhesion Peptides on Hydroxyapatite and Tio<sub>2</sub>Surfaces: Implication in Biomedical Implant Devices

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Journal of Biomaterials and Nanobiotechnology 2013年第4期4卷 351-356页

作者： Subhashis Biswas Udo becker Department of Chemistry Narula Institute of Technology Westbengal University of Technology Kolkata India Department of Earth and Environmental Sciences University of Michigan Ann Arbor USA.

Molecular modeling as a tool in studying peptide-substrate interactions provides insight on peptide adsorption conformation, adsorption energy, and stability of the peptide-inorganic interface. This work investigates the hydration and interaction of cell-adhesion peptides, specifically RGD and YIGSR, with the hydroxyapatite surface and Tio2 surface in cluster and periodic boundary condition approaches. The comparison of adsorption energies of RGD and YIGSR on both Hydroxyapatite (HA) and Tio2 surfaces reveals the similarities in adsorption energy and orientation pattern of peptides on both surfaces. The models demonstrate that initial peptide orientation affects adsorption energy for both. YIGSR is consistently more strongly adsorbed to HA-(001) surfaces and steps than RGD for both the surfaces. In addition, RGD maintained its “hairpin”-like structure during adsorption on a flat HA-(001) surface, and a slightly “relaxed hairpin” structure on Tio2 (110) surface. Adsorption energies of RGD on Tio2 (110) surface are significantly more favorable compared to HA-(001) surface, suggesting potential role of Tio2 as biomedical implants when tissue regeneration occurs via cell signaling.

关键词： Hydroxyapatite Nanobiomaterial Bone-Tissue Engineering RGD Tio2