Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

According to reports, cardiorespiratory fitness (CRF) and skeletal muscle fitness (SMF) show deterioration among the adolescent population due to sedentary lifestyle. This study sought to establish the relationship between the level of CRF and SMF with the health indicators systemic blood pressure (SBP), blood glucose (Glu) and body fat; in adolescents aged 15 to 18 years. A total of 44 men and 60 women studying high school from Colima, Mexico, participated in the study (17.1 ± 1.2 years of age). The CRF was evaluated using Tecumseh protocol, and SMF was assessed with dynamometry to determine the maximum voluntary isometric tension in three exercises: knee extension, elbow extension and elbow flexion, adjusted to the muscle cross-sectional area. Regression analysis and curvilinear estimation indicated that the level of CRF and SMF have a moderate and significant association with health-friendly body fat and muscle mass. In men, the SBP presented an inverse association with CRF and SMF.

The objective of the study was to determine the nutritional value, ruminal fermentation, and in vitro methane production of foliage of tree and shrubs species with forage potential as feeding strategies in dry season and mitigation of methane emissions. The rumen liquor was taken by an esophageal tube. A repeated block design overtime was used. The content of crude protein (CP) and neutral and acid detergent fiber ranged from 6.14% to 21.78%, 44.34% to 77.43% and 16.12% to 49.53% of dry matter (DM). No difference was found in the maximum volume of gas (p > 0.05). The degradability was different among species, and it was higher for Tithonia diversifolia (760.40 g/kg DM), Morus alba (800.66 g/kg DM) and Hibuscus rosa-sinensis (800.16 g/kg DM), whilst the lower was for Megathyrsus maximus (390.40 g/kg DM and 287.40 g/kg organic matter (OM)) (p < 0.05). No difference in methane (CH4) production was observed (p > 0.05). It is concluded that L. leucocephala, P. piscipula, B. alicastrum and G. ulmifolia, T. diversifolia, and M. alba have a high potential to be included in the ruminant diet as sources of protein in the dry season and strategies to mitigate methane emissions.

Climate change is a variation of climate mainly attributed to human activities; this change affects ecosystems, livelihoods, infrastructure, among others. In this way, the objective of the present study was to assess the sensitivity of rural areas exposed to climate variability and climate change using a set of indicators at the área geoestadística básica (AGEB) level. This method was applied as a case study in Guasave, Sinaloa, Mexico. A total of 15 indicators distributed in four groups of variables with equal weight were used. The information needed to quantify the indicators was obtained from the 2010 population and housing census and through the application of household surveys. The results show that 13 AGEB need attention due to their sensitivity level, which is associated with a high dependence on primary activities. Based on these results, actions are proposed to improve the adaptive capacity of the region.

The objective of this study was to determine the relationship between the HbA1c values, the time suffering from diabetes, the age, the body mass index (BMI), the triglyceride levels, the cholesterol and the blood pressure (BP) with sexual function and dysfunction in women with type 2 diabetes mellitus (T2D). This was a descriptive, correlational and cross-sectional study. Sampling was non-probabilistic, 113 sexually active women with diabetes. A personal information form and the female sexual function index (FSFI) were applied (Rosen et al., 2000); the A1cNOW+ and Cardiochek devices, a scale with stadiometer and a mercury baumanometer were used. A high percentage of women with obesity and lack of glycemic control were found, along with a negative relationship of age and female sexual dysfunction (rs = -0.237; p = 0.01). In the group of women presenting sexual dysfunction, a relationship between age and desire (R2 = 6.3%; F[89] = 4.31; p = 0.01), arousal (R2 = 7.6%; F[89] = 7.12; p = 0.00), and lubrication (R2 = 12.5%; F[89] = 12.38; p = 0.01) was found. The results contribute to strengthening the scientific knowledge about female sexuality in a state of chronic disease

Sunflower is the fourth important oil seed plant in worldwide production and high oil seed content. On the other hand, the haploid plants are available to get inbred lines in a short time. The aim of this study was to develop a protocol to obtain sunflower from in vitro anther culture. The basic medium used was Murashige & Skoog (MS). Two bioassays were performed: bioassay I consisted of 25 treatments with five doses of 2,4-dichlorophenoxyacetic (2,4-D) (μM) and five doses of benzyladenine (BA) (μM), whereas bioassay II consisted of five treatments. The obtained callus was fixed with FFA and was observed under a microscope. In bioassay I, the induction of callus appeared at 25 days in low doses with higher weight; with higher doses, the induction was present at 40 days (r = -0.95). In bioassay II, the induction appeared at 23 days with all doses, obtaining highest callus weight. Outbreaks were not induced in transplanted callus. Uninucleate pollen grains, haploid and diploid callus and cells with haploid genome were observed.

Pyrazinamide is a prodrug used in infections against Mycobacterium tuberculosis and its resistance is mainly due to mutations in the pncA gene. In this study, the detection of point mutations of this gene was performed in clinical isolates from the State of Nuevo León. Three-dimensional models of the pyrazinamidase enzyme were made by sequencing and using computational tools. The presence of important mutations in eight samples was observed, and in two of them termination codons are shown. The analyzes performed showed that the Q10P and W68S mutations structurally affected the active site. The P62L and D63A mutations occur in an important site; however, the enzyme remains stable. On the contrary, when the S179R mutation is analyzed, the enzymatic function is found to be highly unstable.

In this study the concentration in the Mexican banking markets and the technical efficiency of the Mexican commercial banks are analyzed. Moreover, the concentration in the credit, deposit and other profitable-asset markets are studied with the Herfindahl-Hirschman (HHI) and the dominance (DI) indexes. Technical efficiency indicators are built using data envelopment analysis (DEA) models. The main findings show the existence of differentiated increases in competition, efficiency and banking assets. The increases depended on the asymmetries in the size of the banks and the markets analyzed. The panel used in this study includes monthly data from January 2001 to March 2018.

For rational use of moringa seeds and its anatomical fractions (kernel, shells, and wings), the objective of the present investigation was to analyze their chemical composition, antinutritional factors content, and antioxidant capacity. The seed kernel fraction represents 71.78% of the whole seed weight and possesses high contents of protein (32.19%) and lipids (38.72%), whereas seed shells and wings fractions are mainly composed of dietary fiber and carbohydrates. Phytate was the most abundant antinutritional factor detected in all fractions (604.0 mg PAE/100 g-1674.9 mg PAE/100 g), followed by total phenolics (218.5 mg GAE/100 g-386.9 mg GAE/100 g) and saponins (130.4 mg DE/100 g-197.4 mg DE/100 g). Moringa seeds fractions showed a high antioxidant capacity. The kernel fraction exerts the highest activity (15 251.90 μmol TE/100g), followed by shells (8 499.50 μmol TE/100g) and wings (5 878.90 μmol TE/100g). Moringa seed kernel fraction seems to be a promising source of protein. All anatomical seed fractions of moringa are a reservoir of dietary fiber and antioxidants.

This research aimed to establish the relationship between the social perception about Covid-19 and emotional distress, worry and catastrophic cognition, unnecessary purchases, healing beliefs and socio-emotional skills of Mexicans over 18 years old, from four geographic regions in Mexico. A quantitative methodology was used, with 2324 Mexican people participating in a survey during the phase 2 of Covid-19 pandemic. The results show high concern and catastrophic thinking (M = 34.58), understood as a negative cognitive-emotional response that inflates the value of the threat (Álvarez-Aztorga et al., 2019). High emotional distress (M = 18.95) was found as an unpleasant and multifactorial emotional experience (Bernales et al., 2019). In the general linear regression model, worry and catastrophic cognition (B = 0.642) are related to emotional distress. Socio-emotional competencies (B = -0.152) are a protective factor used as tools that regulate emotional states (Torres, 2018) but with less intensity.

The processes of change of land and vegetation use in Mexico are a phenomenon caused by the expansion of anthropic activities. Given this and other problems, the generation of strategies through the decree of protected natural areas seeks to protect the integrity of representative ecosystems. Nevertheless, the lack of implementation of management policies in these geographical spaces makes evident their socio-environmental deterioration. Under this preamble, the objective of this research was to identify, locate and spatially analyze the transformation processes that directly affect the changes in land and vegetation use within the administrative territory of the Otomi-Mexica Park in the State of Mexico. Through the generation of land and vegetation use coverings of the years 1993 and 2018, application of overlay methods, photointerpretation techniques and field work, it is determined that changes in land and vegetation use are generated by conversion processes, modification and fragmentation.