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Se describen a los micro-papers como formatos novedosos e incipientes para la difusión del conocimiento científico, tanto en revistas científicas como a través de otros métodos nativos del Internet (repositorios, blogs, etcétera). Planteamos la importancia de la utilización de este formato reducido de comunicación de la ciencia para transmitir ciertos tipos de hallazgos, pues presenta una condensación de la información básica en un documento breve, de fácil lectura y con amplia audiencia, sin perder la calidad propia de los trabajos científicos revisados. Para ello, se realiza un estudio descriptivo de carácter exploratorio por medio de una revisión bibliográfica que ahonda en su uso actual y experiencias previas. Concluimos que su viabilidad para la difusión de contenidos científicos concretos busca la agilidad, sin que ello implique la pérdida de la calidad en la difusión científica.

APPLICATION OF MASS SPECTROMETRY WITH PAPER SPRAY IONIZATION AND THE OPLS-DA CHEMOMETRIC METHOD FOR THE DIAGNOSIS OF PROSTATE CANCER BY ANALYSIS OF URINE SAMPLES. In this study, paper spray ionization mass spectrometry (PSI-MS) allied to orthogonal projections on the latent structure-discrimination analysis (OPLS-DA) was employed to differentiate urine samples from patients with prostate cancer and control individuals (without prostate cancer). The parameters of sensitivity, specificity, efficiency and Matthew’s correlation coefficient determined to analyze the efficiency and quality of the OPLS-DA model obtained a value equal to 1, which means, respectively, that the model has a good performance to correctly classify true positive samples and true negatives. These results showed 100% correct classification of the samples from the training and test set, demonstrating a high efficiency of the OPLS-DA model when classifying all samples considered as belonging to the class of interest (urine from control patient) into class 1 and all samples considered as belonging to the non-interest class (urine from patients with prostate cancer) in class 0. This efficiency resulting from the application of this model suggests that the PSI-MS combined to OPLS-DA is a promisor approach for a rapid diagnosis of prostate cancer, via chemical fingerprints of urine samples.

Introduction and purpose A pilonidal cyst also known as a pilondial sinus, is an inflammatory condition that occurs in the intergluteal region, which can lead to serious infections. It most commonly affects young men, with risk factors including the presence of hair in this area, excessive sweating, obesity, and poor hygiene. Symptoms include a lump, pain, and purulent discharge from openings in the skin. Diagnosis involves taking a medical history, a physical examination, and often an ultrasound. The aim of this paper is to present and compare the available methods for treating pilonidal cysts. Materials and methods Literature available in PubMed databases were reviewed using the following keywords: ‘’Pilonidal cyst’’, ‘’Hair cyst’’, ‘’Abscess’’, ‘’Treatment of pilonidal cyst’’,’’ Bascom II method’’,’’ Limberg flap’’,’’ Suchorski technique’’, ‘’V-Y or Z skin flap reconstruction’’,’’ the Karadakis’’ Results The available treatment methods can be divided into conservative and invasive approaches. Conservative methods include hair removal and improved hygiene. Among the surgical methods, there are traditional excision techniques and modern methods such as excision using the Bascom II method, Limberg flap, Suchorski technique, or V-Y or Z skin flap reconstruction. The Karadakis method, which involves shifting a skin flap, is particularly effective for obese patients. Conclusion Treatment of pilonidal cysts depends on the stage and symptoms. Abscesses require urgent surgical intervention, while asymptomatic cysts can be treated conservatively or surgically.

Se presenta un estudio sobre la adaptación de un examen de inglés a estudiantes con diversidad funcional. El estudio profundiza en los desafíos que enfrenta un estudiante parcialmente ciego con una pérdida sustancial de visión y sin formación previa en Braille cuando intenta realizar exámenes escritos en la clase de inglés. Entre las dificultades encontradas el navegar en texto continuo con software de conversión de texto a voz (TTS), la dependencia de imágenes y el impacto de las limitaciones de tiempo. La investigación subraya la eficacia de las adaptaciones realizadas al formato del examen para abordar estos desafíos y mejorar la accesibilidad y la inclusión. Los hallazgos revelan resultados favorables para el desempeño y el bienestar del estudiante con diversidad funcional durante el examen adaptado. El estudio enfatiza la importancia de los estudios longitudinales para monitorear el progreso del dominio del lenguaje de estudiantes visualmente limitados a lo largo del tiempo.

Se trata de exploraciones esenciales en torno al papel, su textura y las relaciones originadas a partir de su recorte y superposición en capas. Son obras minimalistas en su técnica que despliegan paisajes de formas plegadas y laminadas con profundidad y equilibrio que parten también del imaginario personal sobre la arquitectura. Las composiciones tienen un formato de 21x21 cm. Las mismas reglas operan en todas ellas: el orden y el número de capas, colores, etc., pero se recombinan en cada pieza de forma diferente. Las capas de papel se separan entre sí a unas distancias concretas y se unen de forma solidaria sólo por una pestaña en la parte superior, lo que permite una cierta libertad y tolerancia en la separación entre ellas, de forma que la percepción puede variar levemente en función del plegado o la curvatura del papel, incluso de las condiciones de humedad y atmosféricas.

During the recycling of a cardboard box in the shape of a right prism with a square base to build a tetrahedron, there was the curious coincidence that the height of the first was equal to the inclined height of the second. After some bending and cutting on the prism, its dynamic conversion to the tetrahedron and vice versa was achieved. This fact motivated us to carry out a study on the meaningful learning of a small group of participants (N = 10) with minimum primary school education, regarding the volume of these two common geometric bodies. It was found that 70 % of the study population thought that the volumes were equal and that 100 % had forgotten the formula to calculate the volume of the tetrahedron. A template to build the model and a video to illustrate the mentioned transformation process are also presented.

As in other countries, In Brazil, new genetic materials of Eucalyptus spp. and their hybrids are multiplied through cloning. These materials, currently in experimental trials, must undergo several stages to select the best ones for pulp and paper production. Therefore, new studies on wood quality are essential. Therefore, this study aimed to group 11 clones of Eucalyptus spp. wood, from a clonal plantation in the municipality of Palmital, São Paulo State, for the production of paper and cellulose. For this purpose, four trees of each clone of 4-year-old Eucalyptus spp. were collected. From each tree, a log of 1 m in length was taken from the base of the tree, for the study of the characterization of the basic density and cellular dimensions of the wood. The results showed that there were significant differences between clones for basic density, fiber length, vessel element length and fiber wall thickness. The Runkel ratio, wall fraction and stiffness coefficient did not show significant differences between the different genotypes. From the results obtained, we can conclude that clones can be differentiated only by basic density, fiber length, vessel element length and fiber wall thickness. The Runkel index, flexibility coefficient and wall fraction of Eucalyptus spp. were more efficient to group the clones into two groups.