Letters toProspects     

Malcolm S. Adiseshiah  Rafael Gómez-Pérez Ph.D.  LL.D. 《Prospects》1974,4(3):445-447

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The death of children following negligence: Social aspects     

Elisabeth Trube-Becker 《Child abuse & neglect》1977,1(1):25-30

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Profiles of educators: József Eötvös (1813–71)     

István Mészarós  Charles McFadden  Vladimir Mužić  Olivier Reboul 《Prospects》1985,15(4):633-639

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Nordic walking practice might improve plantar pressure distribution     

Pérez-Soriano P  Llana-Belloch S  Martínez-Nova A  Morey-Klapsing G  Encarnación-Martínez A 《Research quarterly for exercise and sport》2011,82(4):593-599

Nordic walking (NW), characterized by the use of two walking poles, is becoming increasingly popular (Morgulec-Adamowicz, Marszalek, & Jagustyn, 2011). We studied walking pressure patterns of 20 experienced and 30 beginner Nordic walkers. Plantar pressures from nine foot zones were measured during trials performed at two walking speeds (preferred and 20% faster), and under two walking conditions (NW vs. normal walking). In comparison to normal walking, NW experience led to a significant (p < .05) pressure reduction of about 50% on the central metatarsals. No significant increases were detected in other foot regions. The differences between experienced and beginners during normal walking including a 40% pressure reduction on the metatarsal area, suggests that regular NW practice might also have a beneficial effect on plantar pressure when walking without poles.  相似文献   

“You Just Type in What You Are Looking For”: Undergraduates' Use of Library Resources vs. Wikipedia     

Mónica Colón-Aguirre  Rachel A. Fleming-May 《The Journal of Academic Librarianship》2012,38(6):391-399

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Osmotic Concentration of Gooseberry Fruits – The Influence of Temperature,Time and Pretreatment Methods on Mass Transfer and Total Polyphenol and Organic Acid Content     

Anna Kucner  Robert Klewicki  Micha? Sójka  El?bieta Klewicka 《Food Technology and Biotechnology》2014,52(4):411-419

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Ageing of brazilwood dye in wool – a chromatographic and spectrometric study     

Ana Manhita  Vanda Santos  Helena Vargas  António Candeias  Teresa Ferreira  Cristina Barrocas Dias 《Journal of Cultural Heritage》2013,14(6):471-479

Brazilwood was used in this work to dye wool mordanted with different amounts of copper(II) sulfate, alum and iron(II) sulfate. Two different dyeing methods were used: premordanting (MD) and simultaneous mordanting (M+D) procedures. In order to evaluate the influence of the mordant ion in the brazilein chromophore photodegradation, samples were subjected to artificial light ageing. Color measurements were made and, for the first time, LC-DAD-ESI-MS was used for chromophore analysis of the dyed fibers before and after light exposure. Mordant ion quantification was done after fiber acid digestion, by inductively coupled plasma-optical emission spectroscopy (ICP-OES) and flame atomic absorption spectroscopy (FAAS). Mordant metal ion, mordant bath concentration and dyeing procedure were found to have strong influence in the wool fiber hues. Color variation was more pronounced in the alum dyed samples. Overall, mordant quantification showed that the amount of metal ions found in the fibers is very small when compared to the original concentrations of the dyeing bath, being Cu the ion with greater affinity for the wool fibers. MD dyeing procedure yielded fibers with larger amounts of mordant metal ions and higher chromophore peak areas. Higher amounts of brazilein were extracted from wool mordanted with copper(II) sulfate. Finally, chromatographic analysis of the brazilwood dyed samples before and after light exposure resulted in the detection of Type C compound as an outcome of the photodegradation process.  相似文献   

Preservation of a two-wing Lorenz-like attractor with stable equilibria     

L.J. Ontañón-García  E. Campos-Cantón 《Journal of The Franklin Institute》2013,350(10):2867-2880

In this paper, we present the preservation of a two-wing Lorenz-like attractor when in the Lorenz system a feedback control is applied, making two of its equilibria a sink. The forced system is capable of generating bistability and the trajectory settles down at one stable equilibrium point depending on the initial condition when the forced signal is zero. Due to a variation in the coupling strength of the control signal the symmetric equilibria of the Lorenz system move causing the basins of attraction to be the dynamic bounded regions that change accordingly. Thus, the preservation of a two-wing Lorenz-like attractor is possible using a switched control law between these dynamic basins of attraction. The forced switched systems also preserve multistability regarding the coupling strength and present multivalued synchronization according to the basin of attraction in which they were initialized. Bifurcations of the controlled system are used to exemplify the different basins generated by the forcing. An illustrative example is given to demonstrate the approach proposed.  相似文献   

Assessment of ghrelin and leptin receptor levels in postmenopausal women who received oral or transdermal menopausal hormonal therapy     

Ruszkowska B  Sokup A  Kulwas A  Socha MW  Góralczyk K  Góralczyk B  Rość D 《Journal of Zhejiang University. Science. B》2012,13(1):35-42

Objective  

In postmenopausal women, an increased leptin concentration and reduced levels of ghrelin and adiponectin were observed. The aim of this study was to evaluate the concentrations of the active form of ghrelin, total ghrelin, leptin receptor, lipoprotein(a) (Lp(a)), and plasminogen activator inhibitor type 1 (PAI-1) in postmenopausal women who received oral or transdermal menopausal hormonal therapy (MHT).  相似文献   

Role of vitamin B12 on methylmalonyl-CoA mutase activity     

Tóshiko Takahashi-I?iguez  Enrique García-Hernandez  Roberto Arreguín-Espinosa  María Elena Flores 《Journal of Zhejiang University. Science. B》2012,13(6):423-437

Vitamin B₁₂ is an organometallic compound with important metabolic derivatives that act as cofactors of certain enzymes, which have been grouped into three subfamilies depending on their cofactors. Among them, methylmalonyl-CoA mutase (MCM) has been extensively studied. This enzyme catalyzes the reversible isomerization of L-methylmalonyl-CoA to succinyl-CoA using adenosylcobalamin (AdoCbl) as a cofactor participating in the generation of radicals that allow isomerization of the substrate. The crystal structure of MCM determined in Propionibacterium freudenreichii var. shermanii has helped to elucidate the role of this cofactor AdoCbl in the reaction to specify the mechanism by which radicals are generated from the coenzyme and to clarify the interactions between the enzyme, coenzyme, and substrate. The existence of human methylmalonic acidemia (MMA) due to the presence of mutations in MCM shows the importance of its role in metabolism. The recent crystallization of the human MCM has shown that despite being similar to the bacterial protein, there are significant differences in the structural organization of the two proteins. Recent studies have identified the involvement of an accessory protein called MMAA, which interacts with MCM to prevent MCM’s inactivation or acts as a chaperone to promote regeneration of inactivated enzyme. The interdisciplinary studies using this protein as a model in different organisms have helped to elucidate the mechanism of action of this isomerase, the impact of mutations at a functional level and their repercussion in the development and progression of MMA in humans. It is still necessary to study the mechanisms involved in more detail using new methods.  相似文献