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This work aims to analyze the relationship between value added tax (VAT) and economic growth in China and Mexico for the period 1991-2021. This research uses the gross domestic product (GDP) as the dependent variable, for the independent variables this research uses VAT and tax revenue. The test results indicated that for China there is a strong and positive relationship between GDP and VAT, as for Mexico the relationship although positive is not strong. [ABSTRACT FROM AUTHOR]

Copyright of Dilemas Contemporáneos: Educación, Política y Valores is the property of Dilemas Contemporaneos: Educacion, Politica y Valores and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Hidalguía is the property of Revista Hidalguia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The objective of this article is to analyse cultural influences when French companies cooperate with Mexican companies (subsidiaries of the French, established in Mexico) in the field of automotive manufacturing. An OEM supplier and a final assembly plant were selected to perform the study. Interviews with the workers, supervisors and managers have been performed. Case studies were collected in order to analyse the problems and to illustrate technical as well as cultural solutions. The analysis showed that important differences and coincidences in the manufacturing solutions could be explained from the cultural (French and Mexican) standpoint. The conclusions integrate some recommendations for French and Mexican companies that are in actual cooperation or that are planning to globalise in the corresponding countries. [ABSTRACT FROM AUTHOR]

The viperid genus Metlapilcoatlus (previously Atropoides) is represented in Mexico by four species: M. olmec , M. mexicanus , M. occidus , and M. nummifer. To date, no studies on their venoms have been reported. Here, we comparatively characterized the venom from M. nummifer neonates (≤8 months of age), young adults (18 months) and adults (≥24 months). We performed biological and enzymatic activities, as well as electrophoretic and RP-HPLC profiling combined with proteomic assignment of major fractions. Venoms from neonates and adults differed in their electrophoretic and chromatographic profiles, indicating that an ontogenetic compositional shift occurs in this species. Protein family assignments showed that neonates produce a venom rich in Snake Venom Metalloproteinases (SVMPs) and Snake Venom Serine Proteases (SVSPs), but lacking Phospholipases A 2 (PLA 2 s). In contrast, adults express abundant venom PLA 2 s, and lower molecular weight proteins, as evidenced by SDS-PAGE. Functionally, neonate venom did not display PLA 2 or procoagulant activities, whereas adult venom did. Hemorrhagic activity was present in both neonate and adult venoms, with similar potencies. Finally, it is of considerable concern that the lethal activity of neither neonate nor adult venoms was neutralized by two therapeutic antivenoms produced in Mexico. • Metlapilcoatlus nummifer venom exhibits ontogenetic variation. • Neonate venom is mainly composed of proteolytic enzymes and lacks phospholipases A 2. • Phospholipases A 2 are abundantly expressed in adult venom. • Neonate venom lacks procoagulant activity. • Two antivenoms failed to neutralize the lethal activity of either neonate or adult M. nummifer venoms in mice. [ABSTRACT FROM AUTHOR]

Objective: To investigate the antibody response to SARS-CoV-2 and identify associated factors in frontline and second-line healthcare workers (HCWs) at a large hospital in Mexico City during the first wave of COVID-19 pandemic., Methods: This was a cross-sectional study of HCWs returning to work following mandatory isolation after recovering from COVID-19. Immunoglobulin (Ig) M and IgG antibodies elicited by SARS-CoV-2 were semiquantitatively measured using densitometric analysis of band intensities in lateral flow assay (LFA) devices. The mean pixel intensity (dots-per-inch [dpi]) of each band on the LFA was considered a measure of antibody titre., Results: Of the 111 HCWs involved in the study, antibody responses were detected in 73/111 (66%) participants. Severe COVID symptoms was associated with old age. No differences in IgM intensity were observed between men and women, but IgG intensity was significantly higher in men than in women. Second-line HCWs produced a higher IgG intensity than firstline HCWs. The IgG intensity was high in severe cases., Conclusions: For HCWs who may acquire SARS-CoV-2 infection, it is necessary to establish a routine program for detection of the virus to avoid risk of infection and spread of COVID-19.