Características morfológicas do pelame de vacas holandesas puras por cruza na região semiárida de Minas Gerais / Hair coat characteristics of graded Holstein cows in semiarid region of Minas Gerais State, Brazil

O objetivo do trabalho foi avaliar as características morfológicas como densidade numérica e espessura do pelame e comprimento dos pelos de vacas Holandesas predominantemente negras, puras por cruza em lactação na região de Montes Claros no norte de Minas Gerais. O estudo foi conduzido em duas fases, A: julho/agosto e B: outubro/novembro de 2010, utilizando 12 fêmeas Holandesas em lactação, puras por cruza de pelame predominante negro. Foram medidas as características de densidade numérica (nº pelos/cm²), espessura (mm), comprimento (mm) e a temperatura da superfície do pelame (TPE). Os resultados mostraram que o pelame foi menos denso, com pelos mais curtos na fase B, no entanto a espessura não variou entre as duas fases. No período em que ocorreu maior densidade numérica houve menor TPE. As características do pelame das vacas Holandesas puras por cruza observadas indicam uma boa adequação às condições ambientais da região em estudo.

The aim of this work was to evaluate the morphological characteristics such as number density, coat thickness and length of predominantly black lactating graded Holstein cows, in the region of Montes Claros in the north of Minas Gerais. The study was conducted in two phases, A: July/August and B: October/November 2010, using 12 lactating female Holstein crossbred dairy cows with predominant black coat. We measured the characteristics of numerical density (number of hair/cm²), thickness (mm) length (mm) and coat surface temperature (CST). Three samples of hair of each animal were taken at each stage through adjusted pliers. The results showed that the coat was less dense, with shorter hair in phase B, and the thickness did not change in the two phases. In the period when the coat was denser, that is, phase A, there was lower CTS. The observed coat characteristics of graded Holstein cows indicate good adaptation to environmental conditions in the region.

Hair fiber characteristics and methods to evaluate hair physical and mechanical properties / Características da fibra do cabelo e métodos para avaliar o cabelo propriedades físicas e mecânicas

The hair thread is a natural fiber formed by keratin, a protein containing high concentration of sulfur coming from the amino acid cystine. The main physical proprieties of the hair depend mostly on its geometry; the physical and mechanical properties of hair involve characteristics to improve: elasticity, smoothness, volume, shine, and softness due to both the significant adherence of the cuticle scales and the movement control (malleability), as well as the easiness of combing, since they reduce the fibers static electricity. The evaluation of these effects on hair may be carried out by several methods, as: optical and electron microscopy, mechanical resistance measuring, shine evaluation and optical coherence tomography (OCT).

O cabelo é uma fibra natural formada por queratina, uma proteína composta por teor elevado de enxofre proveniente da cistina. As propriedades principais do cabelo dependem de sua geometria, estrutura física. Características físicas e mecânicas das fibras capilares envolvem propriedades que melhoram: elasticidade, maciez, volume, maleabilidade, facilidade para o ato de pentear e brilho. A avaliação de tais propriedades do cabelo pode ser obtida por métodos diversos, como: microscopia óptica e eletrônica, mensuração da resistência mecânica, determinação do brilho e tomografia por coerência óptica (OCT).

Caracterización del tricograma en pacientes chilenos / Characterization of trichogram in Chilean patients

Introducción: El tricograma consiste en extraer pelos del cuero cabelludo que luego son examinados mediante un microscopio para determinar qué porcentaje de éstos se encuentra en telógeno, anágeno o catágeno. Objetivos: Caracterizar el tricograma en pacientes chilenos y determinar las diferencias existentes entre los porcentajes de anágeno y telógeno entre cuero cabelludo normal y la zona de menor densidad. Material y Métodos: Estudio observacional descriptivo y retrospectivo de análisis de tricogramas diferenciales de cuero cabelludo. Resultados: Las diferencias del porcentaje de anágeno y telógeno entre cuero cabelludo normal y la zona de menor densidad fueron estadísticamente significativas.

Introduction: Trichogram consists in removing hair follicles from the scalp and examining them under a microscope to determine the percentage of them that are in telogen, anagen or catagen. Aim: To characterize trichogram in chilean patients and determine the differences in anagen and telogen percentages between normal scalp and a lower density zone. Material and Methods: Observational, descriptive and retrospective study of the analysis of differential trichograms of the scalp. Results: The differences in anagen and telogen percentages between normal scalp and the lower density zone were statistically significant.Key words: Trichogram, anagen, telogen.

Body Hair Scores and Total Hair Diameters in Healthy Women in the Kirikkale Region, of Turkey

It was aimed to determine the normal hair scores of women of Kiri kkale region according to the Ferriman- Gallwey scale and to investigate the relationship between the hair shaft diameter and hair scores. Hair scores were calculated in 204 healthy women, and hair shaft diameters were measured from the hair samples collected from 60 patients. Body mass index, waist to hip ratio, insulin resistance and blood androgen levels were determined. Neutral, hormonal and total hair scores were 2.1+/-1.4, 3.1+/-2.7 and 5.2+/-3.6, respectively. The average total hair diameter and hormonal hair diameter were 191.93+/-90.49micrometer and 121.8+/-75.9micrometer respectively. The correlation between total hair diameter and total hair score was statistically significant (r=0.704 p< 0.001). Also, the correlation between hormonal hair diameter and hormonal hair score was statistically significant (r=0.724 p< 0.001). While hair scores and diameters show meaningful positive correlation with androgen levels, they show negative correlation with age. In our population, 95% value of total hair score was 11, and for the hormonal score, it was 9. Hair diameters increase with hair score, regardless of total or hormonal of hair scores. Hair scores and hair diameters may be affected by blood androgens in healthy women.

Sindrome Estafilococico de piel escaldada / Staphylococcal syndrome of scalded skin

Descubrimos un caso de un recien nacido que fue atendida en el servicio de Pediatria del Hospital Santa Barbara por presentar un cuadro clinico de una semana de evolucion, que se inicia con un proceso inflamatorio a nivel de la region umbilica, irritabilidad y elevacion termica no cuantificada y 3 dias despues aparicion de lesiones vesiculares, flietenas, lesciones eritemato descamativas en cara, cuello, torax, extremidades superiores e inferiores con signo de Nicolsky positivo, laboratorialmente presenta un hemograma con una VSG acelerada leucositosis y neutropenia. El tratamiento instaurado Hidratacion cloxacilina endovenosa, presentando de evolucion favorable.

El análisis microscópico comparativo del cabello humano. Su utilidad para la identificación forense de individuos / Comparative microscopic analysis of human hair. Its utility for forensic identification of individuals

El análisis de las características microscópicas del cabello humano es un método de identificación forense antiguo. Para que tenga validez, debe de estar respaldado por un estudio de las frecuencias con las que se manifiestan estas características y de su análisis estadístico. En México no existen estudios de este tipo. Se estudiaron los pelos de la cabeza de un grupo estadísticamente representativo de la población militar mexicana, de acuerdo a la tabla de Strauss modificada, determinándose las frecuencias y la probabilidad de coincidencia al azar en esta población.

O tricograma: Parte I. Significado e método de realizaçäo / The trichogram Part I. Significance and method of performing

O tricograma é um exame que analisa o cabelo em um determinado momento. Alteraçöes fisiológicas e anatômicas do ciclo biológico do pêlo podem ser detectadas por exame. Neste trabalho é descrita a técnica de realizaçäo do exame

Tricograma / Trichogram

O autor faz uma revisao da técnica de realizaçao do tricograma e discute sua interpretaçao e importância como método complementar no diagnóstico e prognóstico das alopecias. Sao também analisados os achados do tricograma em algumas formas de alopecias, como a androcronogenética areata, alopecias de causas externas, alopecia medicamentosa, na tricotilomania, na dermatite seborréica, na psoríase e nas doenças carenciais.

Distribution of hair on the phalanges of the fingers in a sample of medical students

Distribution of hair phalanges shows striking population differences. Previous literature documented the hair distribution among different populations of the world. No report has investigated the Arab Countries except one from Egypt The present article shows the hair distribution on phalanges in Iraqis. The phalanges of 300 males and 200 females were examined. The result shows absence of hair on proximal phalanges in 4% of males and 7.5% of females. The frequency distribution of hair on middle phalanges was 44%. in males and 42.5% in females Although there is a wide range of variation in the presence or absence of hair on the middle phalanges from one population to another, the frequency order an all of them including the present report is on digit 4>digit 3>digit 5>digit 2. The distal phalanges never showed hair which is in agreement with previous reports