92 research outputs found
Family Income Inequality and the Role of Wives Earnings in Mexico: 1988-2010
We study family income inequality in Mexico from 1988 to 2010. Female labor supply increased during this period, especially for married women. The share of wives’ income among married couples grew from 13 percent in 1988 to 23 percent in 2010. However, the correlation of husbands’ and wives’ earnings has been fairly stable with a value close to 0.28, one of the highest correlations recorded across countries. We follow Cancian and Reed’s (1999) methodology in order to analyze whether wives’ income equalizes total family income distribution. We investigate several counterfactuals and conclude that the recent increment in female employment has contributed to a decrease in family income inequality mainly through a rise in wives’ labor supply in poor families.income inequality, female employment, female earnings, Latin America, Mexico
Bis-enolates with extended π-conjugation are powerful nucleophiles. Study of their alkylation reactions with very hindered C-electrophiles
This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Organic Chemistry, copyright © 2019 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.joc.9b01961Bis-enolates with extended Ď€-conjugation, prepared by alkali metal-mediated reduction of several aromatic and unsaturated diesters, can be efficiently and regioselectively alkylated with very hindered C-electrophiles, such as neopentyl, secondary and tertiary alkyl halides, and tosylates. A one-step synthesis of 4-alkyl phthalates was derived from the reductive alkylation of a phthalate diester with hindered halides followed by rearomatization with oxygen. Additionally, synthetic protocols have been developed to efficiently prepare complex fused- or spiro-bicycles from diisopropyl phthalate in just one or two stepsFinancial support from Ministerio de EconomĂa y Competitividad of Spain (CTQ2017-84354-P), Xunta de Galicia (GRC 2014/029 and Centro singular de investigaciĂłn de Galicia accreditation 2016-2019, ED431G/09), and the European Union (European Regional Development Fund-ERDF) is gratefully acknowledged.S
Diseño para una Empresa Familiar de un Sistema AcuapĂłnico con EnergĂa Solar en el Chad
This article describes the design of a single-family aquaponic system powered by solar energy. This technique called “aquaponics” is an activity that blends aquaculture (farming aquatic species) and hydroponics (growing plants in a water-based environment) into one integrated system. A description is given of the elements in the aquaponic circuit, which is sized to scale for a family business, in addition to the budget required for its implementation in Chad. The use of renewable energy offers the possibility of implementing sustainable farming in underdeveloped countries. The objective of this system is to maximize the production of fish and vegetables, taking into account their limitations (20 kg of fish can be produced for every 1,000 liters of water while 8 liters of water are necessary to grow each plant). The fish farmed in this case will be tilapia, as it is technically feasible and has a flavor that is acceptable to the inhabitants of Chad. The cultivated plants include all types of fruits and vegetables, as well as aromatic plants.Este artĂculo describe el diseño de un sistema acuapĂłnico unifamiliar alimentado con energĂa solar. Esta tĂ©cnica llamada “acuaponĂa”, es una actividad en la que convergen la acuicultura (crĂa de especies acuáticas) y la hidroponĂa (cultivo de plantas sobre el agua) en un mismo sistema integrado. Se hace una descripciĂłn de los elementos del circuito acuapĂłnico, un dimensionamiento a nivel de empresa familiar asĂ como el presupuesto que permita su implementaciĂłn en el Chad. Al incluir el uso de energĂas renovables, nos da la posibilidad de implementar el cultivo sostenible en paĂses subdesarrollados. El objetivo de esta instalaciĂłn es maximizar la producciĂłn de pescados y vegetales, teniendo en cuenta sus limitaciones (se pueden producir 20 kg de peces por cada 1000 litros de agua y son necesarios 8 litros por planta cultivada). El pescado que se criará será la tilapia, ya que tĂ©cnicamente es factible y su sabor es aceptado por los habitantes del Chad. En cuando al cultivo de plantas, serán todo tipo de frutas y verduras, asĂ como plantas aromáticas
New prey items in the diet of snakes from the Yucatán Peninsula, Mexico
New prey items are reported in snakes that were found run over during night road trips, belonging to the families Colubridae, Dipsadidae, Elapidae and Viperidae from the Yucatán Peninsula, Mexico.Asociación Herpetológica Argentin
New prey items in the diet of snakes from the Yucatán Peninsula, Mexico
New prey items are reported in snakes that were found run over during night road trips, belonging to the families Colubridae, Dipsadidae, Elapidae and Viperidae from the Yucatán Peninsula, Mexico.Asociación Herpetológica Argentin
New prey items in the diet of snakes from the Yucatán Peninsula, Mexico
New prey items are reported in snakes that were found run over during night road trips, belonging to the families Colubridae, Dipsadidae, Elapidae and Viperidae from the Yucatán Peninsula, Mexico.Asociación Herpetológica Argentin
H2 oxidation versus organic substrate oxidation in non-heme iron mediated reactions with H2O2
Herein we show that species generated upon reaction of α-[Fe(CF3SO3)2(BPMCN)] (BPMCN = N,N′-bis(2-pyridylmethyl)-trans-1,2-diaminocyclohexane) with H2O2 (putatively [FeV(O)(OH)(BPMCN)]) is able to efficiently oxidize H2 to H2O even in the presence of organic substrates, while species formed in the presence of acetic acid (putatively [FeV(O)(OAc)(BPMCN)]) prefer organic substrate oxidation over H2 activation. Mechanistic implications have been analysed with the aid of computational methodsThis work was supported by Spanish Ministerio de Economia y Competitividad (CTQ2012-37420-C02-02 and 01) European Research Council (StG 239910), and Generalitat de Catalunya (2014 SGR 862 and ICREA Academia award to MC). J.Ll.-F. thanks the CELLEX foundation for the starting career program for financial suppor
ErosiĂłn en la BahĂa de SamborombĂłn y cambios en la direcciĂłn de los vientos, provincia de Buenos Aires, Argentina
El corrimiento del anticiclĂłn semipermanente del Atlántico Sur hacia el S y una intensificaciĂłn de los vientos del E en el RĂo de la Plata ha sido documentado por diversos autores. Como consecuencia de esta variabilidad climática se ha detectado un leve incremento en las alturas de las olas desde 1970 al presente en el RĂo de la Plata y ocĂ©ano adyacente. El incremento más notable se observĂł entre las dĂ©cadas del 80’ y 90’ coincidentemente con el incremento de erosiĂłn en la bahĂa SamborombĂłn. La altura de ola media anual se investigĂł mediante simulaciones numĂ©ricas. Las mayores diferencias en alturas (0.20 m, 9%) se observaron en 34°S - 48°W, aproximadamente. En la plataforma continental y en el RĂo de la Plata el incremento fue algo menor (7%). Las medias anuales de las alturas de ola simuladas mostraron tendencias positivas significativas en Mar del Plata, la boca del RĂo de la Plata y la costa Uruguaya. La densidad de energĂa de olas (media anual, espacialmente promediada) presentĂł una tendencia positiva y una relativa alta variabilidad interanual. Se concluye que en general la lĂnea de costa en la bahĂa SamborombĂłn ha retrocedido unos 50 m en los Ăşltimos 49 años.A slight southward shift of the South Atlantic semi-permanent high pressure system and an intensification of the eastern wind at the RĂo de la Plata have been documented by several authors. A mild wind wave height increase has been detected at the RĂo de la Plata and the adjacent continental shelf, from 1970 to the present, as a consequence of the aforementioned climate variability. The most noticeable increase was observed between the 80’and 90’decades, in good agreement with a general increment of erosion at SamborombĂłn Bay and neighboring areas. The annual mean wave height was investigated using numerical simulations. The highest differences in wind wave heights (0.20 m, 9%) were observed at 34°S - 48°W, approximately. The increase was a little lower (7%) at the continental shelf and the RĂo de la Plata. The annual mean of the simulated wave height showed significant positive trends at the RĂo de la Plata mouth, the Uruguayan coast and Mar del Plata. The wind wave energy density (annual mean, averaged at the computational domain) also presented a significant positive trend and a relatively high inter-annual variability. From the analysis concludes that overall the shoreline has retreated about 50 m in the last 49 years at SamborombĂłn Bay.Universidad Nacional de La Plat
ErosiĂłn en la BahĂa de SamborombĂłn y cambios en la direcciĂłn de los vientos, provincia de Buenos Aires, Argentina
El corrimiento del anticiclĂłn semipermanente del Atlántico Sur hacia el S y una intensificaciĂłn de los vientos del E en el RĂo de la Plata ha sido documentado por diversos autores. Como consecuencia de esta variabilidad climática se ha detectado un leve incremento en las alturas de las olas desde 1970 al presente en el RĂo de la Plata y ocĂ©ano adyacente. El incremento más notable se observĂł entre las dĂ©cadas del 80’ y 90’ coincidentemente con el incremento de erosiĂłn en la bahĂa SamborombĂłn. La altura de ola media anual se investigĂł mediante simulaciones numĂ©ricas. Las mayores diferencias en alturas (0.20 m, 9%) se observaron en 34°S - 48°W, aproximadamente. En la plataforma continental y en el RĂo de la Plata el incremento fue algo menor (7%). Las medias anuales de las alturas de ola simuladas mostraron tendencias positivas significativas en Mar del Plata, la boca del RĂo de la Plata y la costa Uruguaya. La densidad de energĂa de olas (media anual, espacialmente promediada) presentĂł una tendencia positiva y una relativa alta variabilidad interanual. Se concluye que en general la lĂnea de costa en la bahĂa SamborombĂłn ha retrocedido unos 50 m en los Ăşltimos 49 años.A slight southward shift of the South Atlantic semi-permanent high pressure system and an intensification of the eastern wind at the RĂo de la Plata have been documented by several authors. A mild wind wave height increase has been detected at the RĂo de la Plata and the adjacent continental shelf, from 1970 to the present, as a consequence of the aforementioned climate variability. The most noticeable increase was observed between the 80’and 90’decades, in good agreement with a general increment of erosion at SamborombĂłn Bay and neighboring areas. The annual mean wave height was investigated using numerical simulations. The highest differences in wind wave heights (0.20 m, 9%) were observed at 34°S - 48°W, approximately. The increase was a little lower (7%) at the continental shelf and the RĂo de la Plata. The annual mean of the simulated wave height showed significant positive trends at the RĂo de la Plata mouth, the Uruguayan coast and Mar del Plata. The wind wave energy density (annual mean, averaged at the computational domain) also presented a significant positive trend and a relatively high inter-annual variability. From the analysis concludes that overall the shoreline has retreated about 50 m in the last 49 years at SamborombĂłn Bay.Universidad Nacional de La Plat
ErosiĂłn en la BahĂa de SamborombĂłn y cambios en la direcciĂłn de los vientos, provincia de Buenos Aires, Argentina
El corrimiento del anticiclĂłn semipermanente del Atlántico Sur hacia el S y una intensificaciĂłn de los vientos del E en el RĂo de la Plata ha sido documentado por diversos autores. Como consecuencia de esta variabilidad climática se ha detectado un leve incremento en las alturas de las olas desde 1970 al presente en el RĂo de la Plata y ocĂ©ano adyacente. El incremento más notable se observĂł entre las dĂ©cadas del 80’ y 90’ coincidentemente con el incremento de erosiĂłn en la bahĂa SamborombĂłn. La altura de ola media anual se investigĂł mediante simulaciones numĂ©ricas. Las mayores diferencias en alturas (0.20 m, 9%) se observaron en 34°S - 48°W, aproximadamente. En la plataforma continental y en el RĂo de la Plata el incremento fue algo menor (7%). Las medias anuales de las alturas de ola simuladas mostraron tendencias positivas significativas en Mar del Plata, la boca del RĂo de la Plata y la costa Uruguaya. La densidad de energĂa de olas (media anual, espacialmente promediada) presentĂł una tendencia positiva y una relativa alta variabilidad interanual. Se concluye que en general la lĂnea de costa en la bahĂa SamborombĂłn ha retrocedido unos 50 m en los Ăşltimos 49 años.A slight southward shift of the South Atlantic semi-permanent high pressure system and an intensification of the eastern wind at the RĂo de la Plata have been documented by several authors. A mild wind wave height increase has been detected at the RĂo de la Plata and the adjacent continental shelf, from 1970 to the present, as a consequence of the aforementioned climate variability. The most noticeable increase was observed between the 80’and 90’decades, in good agreement with a general increment of erosion at SamborombĂłn Bay and neighboring areas. The annual mean wave height was investigated using numerical simulations. The highest differences in wind wave heights (0.20 m, 9%) were observed at 34°S - 48°W, approximately. The increase was a little lower (7%) at the continental shelf and the RĂo de la Plata. The annual mean of the simulated wave height showed significant positive trends at the RĂo de la Plata mouth, the Uruguayan coast and Mar del Plata. The wind wave energy density (annual mean, averaged at the computational domain) also presented a significant positive trend and a relatively high inter-annual variability. From the analysis concludes that overall the shoreline has retreated about 50 m in the last 49 years at SamborombĂłn Bay.Universidad Nacional de La Plat
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