56 research outputs found
Variations of training load, monotony, and strain and dose-response relationships with maximal aerobic speed, maximal oxygen uptake, and isokinetic strength in professional soccer players
This study aimed to identify variations in weekly training load, training monotony, and training strain across a 10-week period (during both, pre- and in-season phases); and to analyze the dose-response relationships between training markers and maximal aerobic speed (MAS), maximal oxygen uptake, and isokinetic strength. Twenty-seven professional soccer players (24.9±3.5 years old) were monitored across the 10-week period using global positioning system units. Players were also tested for maximal aerobic speed, maximal oxygen uptake, and isokinetic strength before and after 10 weeks of training. Large positive correlations were found between sum of training load and extension peak torque in the right lower limb (r = 0.57, 90%CI[0.15;0.82]) and the ratio agonist/antagonist in the right lower limb (r = 0.51, [0.06;0.78]). It was observed that loading measures fluctuated across the period of the study and that the load was meaningfully associated with changes in the fitness status of players. However, those magnitudes of correlations were small-to-large, suggesting that variations in fitness level cannot be exclusively explained by the accumulated load and loading profile
Avaliação e tratamento do doente com acne â Parte I: Epidemiologia, etiopatogenia, clĂnica, classificação, impacto psicossocial, mitos e realidades, diagnĂłstico diferencial e estudos complementares
O Portuguese Acne Advisory Board (PAAB), grupo de dermatologistas portugueses que, Ă semelhança de grupos congĂ©neres internacionais, tem dedicado particular atenção Ă definição de linhas de orientação para o tratamento da acne, pretende que o presente documento constitua uma ferramenta Ăștil na abordagem dos doentes com esta patologia. Elaborou-se um dossier, para educação mĂ©dica contĂnua, subdividido em 2 partes: Parte I â etiopatogenia e clĂnica; Parte II â abordagem terapĂȘutica.
Nesta Parte I, revĂȘem-se os principais aspectos da clĂnica e da fisiopatogenia da acne Ă luz dos conhecimentos actuais. Discute-se a importĂąncia do impacto psicolĂłgico e social desta entidade e analisam-se os principais mitos e realidades com ela relacionados. Descrevem-se, sucintamente, as patologias mais relevantes no diagnĂłstico diferencial das lesĂ”es de acne. Enumeram-se as indicaçÔes para estudo hormonal, bem como os exames a efectuar nos doentes com esta patologia.
The Portuguese Acne Advisory Board (PAAB), a group of Portuguese dermatologists with a special interest in acne, develop, as other international groups in this field, consensus recommendations for the treatment of acne. Overall, the goal is to provide a practice guideline to all physicians dealing with this entity. The continuing medical education dossier was divided in two parts: Part I â etiopathogeny and clinical features; Part II â therapy.
This Part I reviews acne pathophysiology, clinical aspects, psychological and social impact and several myths surrounding this disease. Some other entities relevant for the differential diagnosis are described. The need of hormonal evaluation is also discusse
Avaliação e tratamento do doente com acne - Parte II: tratamento tĂłpico, sistĂ©mico e cirĂșrgico, tratamento da acne na grĂĄvida, algoritmo terapĂȘutico
O Portuguese Acne Advisory Board (PAAB), grupo de dermatologistas portugueses que, Ă semelhança de grupos congĂ©neres internacionais, tem dedicado particular atenção Ă definição de linhas de orientação para o tratamento da acne, pretende que o presente documento constitua uma ferramenta Ăștil na abordagem dos doentes com esta patologia. Elaborou-se um dossier, para educação mĂ©dica contĂnua, subdividido em 2 partes: Parte I â etiopatogenia e clĂnica; Parte II â abordagem terapĂȘutica.
Nesta Parte II discute-se a abordagem terapĂȘutica â tĂłpica e sistĂ©mica â em cada forma clĂnica de acne, dando particular ĂȘnfase aos retinĂłides e aos antimicrobianos, e salientam-se as estratĂ©gias a adoptar para limitar a crescente resistĂȘncia bacteriana aos antibiĂłticos. Referem-se as indicaçÔes especĂficas para terapĂȘutica hormonal e analisam-se as particularidades do tratamento da acne na grĂĄvida e lactante. Descrevem-se algumas tĂ©cnicas para correcção das cicatrizes da acne.
Por Ășltimo, publica-se um algoritmo que pretende ilustrar a classificação da acne e definir, para cada tipo clĂnico, a abordagem terapĂȘutica consensualmente recomendada
Chromium removal from aqueous solution by a PEI-silica nanocomposite
It is essential and important to determine the adsorption mechanism as well as removal efficiency when using an adsorption technique to remove toxic heavy metals from wastewater. In this research, the removal efficiency and mechanism of chromium removal by a silica-based nanoparticle were investigated. A PEI-silica nanoparticle was synthesized by a one-pot technique and exhibited uniformly well-dispersed PEI polymers in silica particles. The adsorption capacity of chromium ions was determined by a batch adsorption test, with the PEI-silica nanoparticle having a value of 183.7 mg/g and monolayer sorption. Adsorption of chromium ions was affected by the solution pH and altered the nanoparticle surface chemically. First principles calculations of the adsorption energies for the relevant adsorption configurations and XPS peaks of Cr and N showed that Cr(VI), [HCrO4](-) is reduced to two species, Cr(III), CrOH2+ and Cr3+, by an amine group and that Cr(III) and Cr(VI) ions are adsorbed on different functional groups, oxidized N and NH3+
CaracterĂsticas de um grupo de usuĂĄrios do Programa SaĂșde da FamĂlia na cidade de Campo Bom (RS), Brasil em 2006
Are oral health conditions associated with schoolchildren's performance and school attendance in the Kingdom of Bahrain? A life-course perspective
Background
The link between oral diseases and school performance and school attendance remains unclear among Middle Eastern children.
Aim
To investigate the relationship of oral conditions with schoolchildrenâs school performance and attendance using the life course approach.
Design
A cross-sectional study was conducted with 466 schoolchildren aged 7-8 years from Kingdom of Bahrain (KoB) and their parents. Questionnaire data on childrenâs current and at birth environmental characteristics were completed by their parents. Childrenâs oral health measures, including ICDAS (International Caries Detection and Assessment System), PUFA (Pulp, Ulcer, Fistula, Abscess), and DDE (Developmental Defects of Enamel) indices, were the exposure variables. School performance and school attendance data obtained from the school register were the outcome variables. The data were analysed using multivariate ordinal logistic regression.
Results
The odds of Excellent school performance were significantly lower for children with untreated dentine caries (OR = 0.98 CI 95%: 0.96-0.99). Children with caries-treated teeth showed greater odds of Excellent school performance (OR=1.41 CI 95%: 1.15-1.74). A permissive parental style was associated with poor school attendance (OR= 2.63 CI 95%: 1.08-6.42).
Conclusion
Dental caries was associated with poor school performance but not with school attendance. Treated caries was associated with good school performance
Experimental biogeography: the role of environmental gradients in high geographic diversity in Cape Proteaceae
One of the fundamental dimensions of biodiversity is the rate of species turnover across geographic distance. The Cape Floristic Region of South Africa has exceptionally high geographic species turnover, much of which is associated with groups of closely related species with mostly or completely non-overlapping distributions. A basic unresolved question about biodiversity in this global hotspot is the relative importance of ecological gradients in generating and maintaining high geographic turnover in the region. We used reciprocal transplant experiments to test the extent to which abiotic environmental factors may limit the distributions of a group of closely related species in the genus Protea (Proteaceae), and thus elevate species turnover in this diverse, iconic family. We tested whether these species have a âhome site advantageâ in demographic rates (germination, growth, mortality), and also parameterized stage-structured demographic models for the species. Two of the three native species were predicted to have a demographic advantage at their home sites. The models also predicted, however, that species could maintain positive population growth rates at sites beyond their current distribution limits. Thus the experiment suggests that abiotic limitation under current environmental conditions does not fully explain the observed distribution limits or resulting biogeographic pattern. One potentially important mechanism is dispersal limitation, which is consistent with estimates based on genetic data and mechanistic dispersal models, though other mechanisms including competition may also play a role
Relação entre condição gengival e fatores sociodemogråficos de adolescentes residentes em uma região brasileira
The Arsenic Contamination of Drinking and Groundwaters in Bangladesh: Featuring Biogeochemical Aspects and Implications on Public Health
Match-Play and Performance Test Responses of Soccer Goalkeepers: A Review of Current Literature.
Goalkeepers are typically the last defensive line for soccer teams aiming to minimise goals being conceded, with match rules permitting ball handling within a specific area. Goalkeepers are also involved in initiating some offensive plays, and typically remain in close proximity to the goal line while coveringâ~â50% of the match distances of outfield players; hence, the competitive and training demands of goalkeepers are unique to their specialised position. Indeed, isolated performance tests differentiate goalkeepers from outfield players in multiple variables. With a view to informing future research, this review summarised currently available literature reporting goalkeeper responses to: (1) match play (movement and skilled/technical demands) and (2) isolated performance assessments (strength, power, speed, aerobic capacity, joint range of motion). Literature searching and screening processes yielded 26 eligible records and highlighted that goalkeepers coveredâ~â4-6 km on match day whilst spendingâ~â98% of time at low-movement intensities. The most decisive moments are the 2-10 saves·match-1 performed, which often involve explosive actions (e.g. dives, jumps). Whilst no between-half performance decrements have been observed in professional goalkeepers, possible transient changes over shorter match epochs remain unclear. Isolated performance tests confirm divergent profiles between goalkeepers and outfield players (i.e. superior jump performance, reduced [Formula: see text]2max values, slower sprint times), and the training of soccer goalkeepers is typically completed separately from outfield positions with a focus primarily on technical or explosive drills performed within confined spaces. Additional work is needed to examine the physiological responses to goalkeeper-specific training and match activities to determine the efficacy of current preparatory strategies
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