690 research outputs found
Expansion Of The Geographic Distribution Of Faramea Nitida Benth: In The Restinga Of MaranhĂŁo State, Northeastern Brazil
In this study, we present new records of Faramea nitida that extend the range of this species in Maranhão state, Brazil. The new data were the result of fieldwork by us in restinga areas of São José de Ribamar and Alcùntara districts. This report highlights the rediscovery of a species after many years (30 to 70 years) and shows the necessity for more floristic and taxonomic studies on extreme northeastern Brazil. © 2016 Check List and Authors.12
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Ultrasensitive nucleic acid sequence detection by single-molecule electrophoresis
This is the final report of a one-year laboratory-directed research and development project at Los Alamos National Laboratory. There has been considerable interest in the development of very sensitive clinical diagnostic techniques over the last few years. Many pathogenic agents are often present in extremely small concentrations in clinical samples, especially at the initial stages of infection, making their detection very difficult. This project sought to develop a new technique for the detection and accurate quantification of specific bacterial and viral nucleic acid sequences in clinical samples. The scheme involved the use of novel hybridization probes for the detection of nucleic acids combined with our recently developed technique of single-molecule electrophoresis. This project is directly relevant to the DOE`s Defense Programs strategic directions in the area of biological warfare counter-proliferation
Resultados Da Colpofixação Sacroespinal Associada A Colporrafia Anterior Para O Tratamento Do Prolapso De CĂșpula Vaginal
To evaluate the results of sacrospinous colpopexy surgery associated with anterior colporrhaphy for the treatment of womeN with post-hysterectomy vaginal vault prolapse. Methods This prospective study included 20women with vault prolapse, PelvicOrgan Prolapse Quantification System (POP-Q) stage ℠2, treated between January 2003 and February 2006, and evaluated in a follow-up review (more than one year later). Genital prolapse was evaluated qualitatively in stages and quantitatively in centimeters. Prolapse stage < 2 was considered to be the cure criterion. Statistical analysis was performed using the Wilcoxon test (paired samples) to compare the points and stages of prolapse before and after surgery. Results Evaluation of the vaginal vault after one year revealed that 95% of subjects were in stage zero and that 5% were in stage 1. For cystocele, 50% were in stage 1, 10% were in stage 0 (cured) and 40% were in stage 2. For rectocele, three women were in stage 1 (15%), one was in stage 2 (5%) and 16 had no further prolapse. The most frequent complication was pain in the right buttock, with remission of symptoms in all three cases three months after surgery. Conclusions In this retrospective study, the surgical correction of vault prolapse using a sacrospinous ligament fixation technique associatedwith anterior colporrhaphy proved effective in resolving genital prolapse. Despite the low complication rates, there was a high rate of cystocele, which may be caused by posterior vaginal shifting due to either the technique or an overvaluation by the POP-Q system. © 2016 by Thieme PublicaçÔes Ltda, Rio de Janeiro, Brazil.382778
Cirurgia Com Tela Para Correção De Prolapso De Parede Anterior: Metanålise
Purpose Pelvic organ prolapse (POP) is a major health issue worldwide, affecting 6â8% of women. The most affected site is the anterior vaginal wall. Multiple procedures and surgical techniques have been used, with or without the use of vaginal meshes, due to common treatment failure, reoperations, and complication rates in some studies. Methods Systematic review of the literature and meta-analysis regarding the use of vaginal mesh in anterior vaginal wall prolapse was performed. A total of 115 papers were retrieved after using the medical subject headings (MESH) terms: âanterior pelvic organ prolapse OR cystocele AND surgery AND (mesh or colporrhaphy)â in the PubMed database. Exclusion criteria were: follow-up shorter than 1âyear, use of biological or absorbable meshes, and inclusion of other vaginal wall prolapses. Studies were put in a data chart by two independent editors; results found in at least two studies were grouped for analysis. Results After the review of the titles by two independent editors, 70 studies were discarded, and after abstract assessment, 18 trials were eligible for full text screening. For final screening and meta-analysis, after applying the Jadad score (â> 2), 12 studies were included. Objective cure was greater in the mesh surgery group (odds ratio [OR]â=â1,28 [1,07â1,53]), which also had greater blood loss (mean deviation [MD]â=â45,98 [9,72â82,25]), longer surgery time (MDâ=â15,08 [0,48â29,67]), but less prolapse recurrence (ORâ=â0,22 [01,3â0,38]). Dyspareunia, symptom resolution and reoperation rates were not statistically different between groups. Quality of life (QOL) assessment through the pelvic organ prolapse/urinary incontinence sexual questionnaire (PISQ-12), the pelvic floor distress inventory (PFDI-20), the pelvic floor impact questionnaire (PFIQ-7), and the perceived quality of life scale (PQOL) was not significantly different. Conclusions Anterior vaginal prolapse mesh surgery has greater anatomic cure rates and less recurrence, although there were no differences regarding subjective cure, reoperation rates and quality of life. Furthermore, mesh surgery was associated with longer surgical time and greater blood loss. Mesh use should be individualized, considering prior history and risk factors for recurrence. © 2016 by Thieme PublicaçÔes Ltda, Rio de Janeiro, Brazil.38735636
Cirurgia com tela para correção de prolapso de parede anterior: metanålise
Pelvic organ prolapse (POP) is a major health issue worldwide, affecting 6â8% of women. The most affected site is the anterior vaginal wall. Multiple procedures and surgical techniques have been used, with or without the use of vaginal meshes, due to common treatment failure, reoperations, and complication rates in some studies. Methods Systematic review of the literature and meta-analysis regarding the use of vaginal mesh in anterior vaginal wall prolapse was performed. A total of 115 papers were retrieved after using the medical subject headings (MESH) terms: âanterior pelvic organ prolapse OR cystocele AND surgery AND (mesh or colporrhaphy)â in the PubMed database. Exclusion criteria were: follow-up shorter than 1âyear, use of biological or absorbable meshes, and inclusion of other vaginal wall prolapses. Studies were put in a data chart by two independent editors; results found in at least two studies were grouped for analysis. Results After the review of the titles by two independent editors, 70 studies were discarded, and after abstract assessment, 18 trials were eligible for full text screening. For final screening and meta-analysis, after applying the Jadad score (â> 2), 12 studies were included. Objective cure was greater in the mesh surgery group (odds ratio [OR]â=â1,28 [1,07â1,53]), which also had greater blood loss (mean deviation [MD]â=â45,98 [9,72â82,25]), longer surgery time (MDâ=â15,08 [0,48â29,67]), but less prolapse recurrence (ORâ=â0,22 [01,3â0,38]). Dyspareunia, symptom resolution and reoperation rates were not statistically different between groups. Quality of life (QOL) assessment through the pelvic organ prolapse/urinary incontinence sexual questionnaire (PISQ-12), the pelvic floor distress inventory (PFDI-20), the pelvic floor impact questionnaire (PFIQ-7), and the perceived quality of life scale (PQOL) was not significantly different. Conclusions Anterior vaginal prolapse mesh surgery has greater anatomic cure rates and less recurrence, although there were no differences regarding subjective cure, reoperation rates and quality of life. Furthermore, mesh surgery was associated with longer surgical time and greater blood loss. Mesh use should be individualized, considering prior history and risk factors for recurrence.387356364Prolapso de ĂłrgĂŁos pĂ©lvicos Ă© problema de saĂșde pĂșblicas, sendo o mais comum o anterior. Para tratamento sĂŁo utilizadas cirurgias, com ou sem telas. O uso de telas Ă© para diminuir recidivas, mas nĂŁo h ĂĄ consenso. MĂ©todos: Foi realizada revisĂŁo da literatura e metanĂĄlise, sobre uso de telas na correção do prolapso anterior. Base de dados foi PUBMED , com termos (MESH): âAnterior Pelvic Organ OR Cystocele AND Surgery AND (Mesh or Colporrhaphy)â. CritĂ©rios de exclusĂŁo foram: seguimento menor que 1 ano, telas biolĂłgicas ou absorvĂveis. Resultados: foram avaliados 115 artigos. ApĂłs revisĂŁo dos tĂtulos, 70 estudos foram descartados e 18 apĂłs leitura de resumos. ApĂłs critĂ©rios de Jadad (>2), 12 estudos foram incluĂdos. AnĂĄlise estatĂstica foi razĂŁo de risco ou diferença entre mĂ©dias dos grupos, e as anĂĄlises com grande heterogeneidade foram avaliadas atravĂ©s de anĂĄlise de efeito aleatĂłrio. Resultados: Cura objetiva foi superior no grupo com tela - OR 1,28 (1,07-1,53, p †0,00001), maior perda sanguĂnea - diferença mĂ©dia (MD) 45,98 (9,72-82,25, p = 0,01), tempo cirĂșrgico mais longo - MD 15,08 (0,48-29,67, p = 0,04), porĂ©m menor recorrĂȘncia - OR 0,22 (0,13-0,38, p = 0,00001), nĂŁo apresentando maior resolução dos sintomas - OR 1,93 (0,83-4,51, p = 0,15). Dispareunia e taxa de reoperação tambĂ©m nĂŁo foram diferentes entre grupos. Qualidade de vida nĂŁo apresentou diferença. ConclusĂ”es: Cirurgia com tela para prolapso vaginal anterior apresenta melhor taxa de cura anatĂŽmica e menor recorrĂȘncia, sem diferenças cura subjetiva, reoperação e qualidade de vida. HĂĄ maior tempo cirĂșrgico e perda sanguĂnea. Uso de telas deve ser individualizado
Networked youth research for empowerment in digital society. The WYRED project
European Commision (EC). Funding H2020/CSA. Project Code: 72706
Electromagnetic form factors of light vector mesons
The electromagnetic form factors G_E(q^2), G_M(q^2), and G_Q(q^2), charge
radii, magnetic and quadrupole moments, and decay widths of the light vector
mesons rho^+, K^{*+} and K^{*0} are calculated in a Lorentz-covariant,
Dyson-Schwinger equation based model using algebraic quark propagators that
incorporate confinement, asymptotic freedom, and dynamical chiral symmetry
breaking, and vector meson Bethe-Salpeter amplitudes closely related to the
pseudoscalar amplitudes obtained from phenomenological studies of pi and K
mesons. Calculated static properties of vector mesons include the charge radii
and magnetic moments: r_{rho+} = 0.61 fm, r_{K*+} = 0.54 fm, and r^2_{K*0} =
-0.048 fm^2; mu_{rho+} = 2.69, mu_{K*+} = 2.37, and mu_{K*0} = -0.40. The
calculated static limits of the rho-meson form factors are similar to those
obtained from light-front quantum mechanical calculations, but begin to differ
above q^2 = 1 GeV^2 due to the dynamical evolution of the quark propagators in
our approach.Comment: 8 pages of RevTeX, 5 eps figure
Klein tunneling in graphene: optics with massless electrons
This article provides a pedagogical review on Klein tunneling in graphene,
i.e. the peculiar tunneling properties of two-dimensional massless Dirac
electrons. We consider two simple situations in detail: a massless Dirac
electron incident either on a potential step or on a potential barrier and use
elementary quantum wave mechanics to obtain the transmission probability. We
emphasize the connection to related phenomena in optics, such as the
Snell-Descartes law of refraction, total internal reflection, Fabry-P\'erot
resonances, negative refraction index materials (the so called meta-materials),
etc. We also stress that Klein tunneling is not a genuine quantum tunneling
effect as it does not necessarily involve passing through a classically
forbidden region via evanescent waves. A crucial role in Klein tunneling is
played by the conservation of (sublattice) pseudo-spin, which is discussed in
detail. A major consequence is the absence of backscattering at normal
incidence, of which we give a new shorten proof. The current experimental
status is also thoroughly reviewed. The appendix contains the discussion of a
one-dimensional toy model that clearly illustrates the difference in Klein
tunneling between mono- and bi-layer graphene.Comment: short review article, 18 pages, 14 figures; v3: references added,
several figures slightly modifie
A Coulomb gas approach to the anisotropic one-dimensional Kondo lattice model at arbitrary filling
We establish a mapping of a general spin-fermion system in one dimension into
a classical generalized Coulomb gas. This mapping allows a renormalization
group treatment of the anisotropic Kondo chain both at and away from
half-filling. We find that the phase diagram contains regions of paramagnetism,
partial and full ferromagnetic order. We also use the method to analyze the
phases of the Ising-Kondo chain.Comment: 19 pages, 9 figure
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