Submandibular Skinfold Thickness Cut-off Values in Relation to Body Mass Index and Percentage Body Fat Among Chilean Adolescents.

The present study evaluates submandibular skinfold (SMS) cutoff values to estimate excess weight for BMI and percentage body fat (%BF) among Chilean adolescents. The results show an optimal area under the cutoff curve value of 83% among girls and 91% in boys to estimate SMS concerning %BF and BMI. The SMS cutoff value estimating obesity by %BF was 10 mm among girls and 9 mm among boys, 10 mm among girls, and 7 mm among boys by BMI. Our results showed that SMS is significantly associated with anthropometric parameters for obesity.

Sorption of ionic liquids in soil enriched with polystyrene microplastic reveals independent behavior of cations and anions.

Recently, much attention has been focused on the application of the Ionic Liquids (ILs) with herbicidal activity in agriculture. It has been suggested that through the appropriate selection of cations and anions, one can adjust the properties of ILs, particularly the hydrophobicity, solubility, bioavailability, toxicity. In practical agricultural conditions, it will be beneficial to reduce the mobility of herbicidal anions, such as the commonly applied 2,4-dichlorophenoxyacetic acid [2,4-D] in the soil. Furthermore, microplastics are becoming increasingly prevalent in the soil, potentially stimulating herbicidal sorption. Therefore, we investigated whether cations in ILs influence the mobility of anions in OECD soil supplemented with polystyrene microplastic (PS). For this purpose, we used the 2,4-D based ILs consisting of: a hydrophilic choline cation [Chol][2,4-D] and a hydrophobic choline cation with a C12chain [C12Chol][2,4-D]. Characterization of selected micropolystyrene was carried out using the BET sorption-desorption isotherm, particle size distribution and changes in soil sorption parameters such as soil sorption capacity and cation exchange capacity. Based on the batch sorption experiment, the effect of microplastic on the sorption of individual cations and anions in soil contaminated with micropolystyrene was evaluated. The results obtained indicate that the introduction of a 1-10% (w/w) PS resulted in an 18-23% increase of the soil sorption capacity. However, the sorption of both ILs' cations increased only by 3-5%. No sorption of the [2,4-D] anion was noted. This suggests that cations and anions forming ILs, behave independently of each other in the environment. The results indicate the fact that ILs upon introduction into the environment are not a new type of emerging contaminant, but rather a typical mixture of ions. It is worth noting that when analyzing the behavior of ILs in the environment, it is necessary to follow the fate of both cations and anions.

Leukocyte and Platelet-Rich Fibrin Have Same Effect as Blood Clot in the 3-Dimensional Alveolar Ridge Preservation. A Split-Mouth Randomized Clinical Trial.

PURPOSE: Leukocyte- and platelet-rich fibrin (L-PRF) has been used for alveolar ridge preservation (ARP) in postextraction tooth sockets. However, current reports have measured its effectiveness in linear measurements of 3-dimensional ridge preservation. The purpose of this study was to determine the effectiveness of the use of L-PRF filling versus natural clot blood healing in ARP according to the clinical, radiographic, and volumetric measurements of postextraction tooth sockets. MATERIALS AND METHODS: A split-mouth randomized clinical trial was designed. Healthy patients who needed bilateral extraction of upper third molars were selected. After the tooth extraction, the socket was filled and distributed randomly with L-PRF and the contralateral socket only with the blood clot. The dimensional change of soft tissue healing around the sockets, and the length, depth, and difference of bone formation were examined using standardized periapical radiographs. Volumetric measurement variation of the sockets was evaluated by 3-dimensional scanning of dental casts. Changes of all measures were analyzed at 7 days (initial) and 3 months (final) after the tooth extraction and compared between both groups (t test; P < .05). RESULTS: Sixteen patients (aged 24.75 ± 3.53 years; 56.25% women) participated. Measurements of wound healing and the length, depth, and difference of bone formation were similar for both study groups at initial and final times. The calculation of initial-final volumetric socket variation was 15.45 ± 13.12 µL using L-PRF and 14.12 ± 11.23 µL using blood clot (P = .78). CONCLUSIONS: L-PRF filling showed the same dimensional and volumetric behavior as normal blood clot healing in the ARP of postextraction tooth sockets. Future investigations will have to analyze the use of surgical models and digital instruments in ARP techniques.

Somatotypes of schoolchildren from Chile: higher endomorphic components among adolescent girls.

OBJECTIVE: this investigation describes the somatotype components and somatotype as a whole in Chilean children and adolescents. METHODS: a cross-sectional study was conducted in Valparaiso, Chile. The somatotypes of 1,409 schoolchildren (747 males) aged 6 to 18 yearswere assessed using the Heath-Carter anthropometric method. Comparative category analyses (endomorph, mesomorph, and ectomorph) were performed using t-tests. To analyze whole somatotypes along two and three dimensions, the somatotype dispersion mean (SDM) and somatotype attitudinal mean (SAM), respectively, were used in addition to a somatochart representation. RESULTS: the somatotype of the male sample showed a marked mesomorph-endomorph biotype (4.9-4.8-2.1), whereas that for the female sample showed a mesomorphic endomorph classification (5.8-4.3-1.8). The samples differed significantly by sex, with an increased endomorphic component observed in females aged 13 to 18 years old. These sex differences were primarily evident in adolescents with high somatotype values in two or three dimensions (SDM ≥ 3.0; SAM ≥ 1.2), indicating high between-group dispersion. The somatocharts showed displacement of the endomorphic components for both sexes, particularly females. CONCLUSIONS: the results provide strong evidence that biotype changes have increased, primarily in terms of relative adiposity (i.e., the endomorphiccomponent) and predominantly in adolescent girls.

Somatotypes of schoolchildren from chile: higher endomorphic components among adolescent girls / El somatotipo de escolares chilenos: altos componentes endomórfi cos en mujeres adolescentes

Objective: this investigation describes the somatotype components and somatotype as a whole in Chilean children and adolescents. Methods: a cross-sectional study was conducted in Valparaiso, Chile. The somatotypes of 1,409 schoolchildren (747 males) aged 6 to 18 years were assessed using the Heath-Carter anthropometric method. Comparative category analyses (endomorph, mesomorph, and ectomorph) were performed using t-tests. To analyze whole somatotypes along two and three dimensions, the somatotype dispersion mean (SDM) and somatotype attitudinal mean (SAM), respectively, were used in addition to a somatochart representation. Results: the somatotype of the male sample showed a marked mesomorph-endomorph biotype (4.9-4.8-2.1), whereas that for the female sample showed a mesomorphic endomorph classification (5.8-4.3-1.8). The samples differed significantly by sex, with an increased endomorphic component observed in females aged 13 to 18 years old. These sex differences were primarily evident in adolescents with high somatotype values in two or three dimensions (SDM ≥ 3.0; SAM ≥ 1.2), indicating high between-group dispersion. The somatocharts showed displacement of the endomorphic components for both sexes, particularly females. Conclusions: the results provide strong evidence that biotype changes have increased, primarily in terms of relative adiposity (i.e., the endomorphic component) and predominantly in adolescent girls

Objetivo: esta investigación tiene por objetivo describir los componentes del somatotipo en niños y adolescentes chilenos. Métodos: se realizo un estudio transversal en la región de Valparaiso, Chile. Se evaluó el somatotipo de 1.409 escolares (747 hombres) de 6 a 18 anos de edad utilizando el método antropometrico de Heath-Carter. Los análisis comparativos por componentes (endomorfia, mesomorfia y ectomorfia) fueron realizados mediante pruebas t. Para analizar el somatotipo como un todo se realizó el cálculo en dos y tres dimensiones, se utilizaron la distancia de dispersión del somatotipo medio (DSM) y la dispersión morfogenica media (DMM) respectivamente, además de una representación en la somatocarta. Resultados: el somatotipo de la muestra masculina mostro un marcado biotipo mesomorfo-endomorfo (4,9-4,8-2,1), mientras que el de la muestra femenina mostro una clasificación meso-endomorfica (5,8-4,3-1,8). Las muestras difirieron significativamente según sexo, con un elevado componente endomorfico observado en mujeres de 13 a 18 años de edad. Estas diferencias en adolescentes por sexo tambien fueron observadas en el análisis del somatotipo en dos y tres dimensiones (DSM ≥ 3,0, DMM ≥ 1,2), lo que indica una alta dispersión entre grupos. Además, las somatocartas mostraron un desplazamiento hacia componentes endomorficos para ambos sexos, principalmente en mujeres. Conclusiones: los resultados proporcionan una fuerte evidencia de que los cambios en los biotipos han aumentado, principalmente en términos de adiposidad relativa (componente endomorfico) y predominantemente en adolescentes mujeres