Alberto Mata | UNAM Universidad Nacional Autónoma de México (original) (raw)
Address: Mexico, Distrito Federal, Mexico
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Papers by Alberto Mata
Cyta - Journal of Food, 2012
Las altas presiones hidrostáticas (APH) se han propuesto como método cuarentenario alternativo pa... more Las altas presiones hidrostáticas (APH) se han propuesto como método cuarentenario alternativo para destruir las larvas de la mosca de la fruta Anastrepha ludens y Anastrepha obliqua que infestan al mango. Sin embargo, existe escasa información científica sobre el efecto de las APH en la fisiología poscosecha de frutos. El objetivo de este trabajo fue evaluar el efecto de la presurización en la fisiología del mango ‘Ataulfo’ durante su maduración a 25°C. Se obtuvieron mangos en madurez fisiológica, se presurizaron a 15, 30 y 60 MPa por 10 o 20 min (se mantuvo un testigo sin tratamiento). Se almacenaron durante 14 días y se evaluaron cambios fisiológicos y fisicoquímicos. Las APH modificaron la fisiología poscosecha de los frutos de forma determinante pero no inhibieron el proceso de maduración. El efecto dependió del nivel de presión, el tiempo de presurización y la interacción de ambos parámetros.High hydrostatic pressure (HHP) has been proposed as a quarantine alternative method to destroy larvae from fruit flies Anastrepha ludens and Anastrepha obliqua that infest the mango. However, there is scarce scientific information on the effect of HHP on the postharvest physiology of target fruits. The aim of this study was to evaluate the effect of pressurization of low intensity in the physiology of the mango “Ataulfo” during ripening in storage at 25°C. Mangoes were obtained in a state of physiological maturity and pressurized to 15, 30, and 60 MPa for 10 or 20 min (fruits control were maintained without treatment). Mangoes were stored for 14 days and changes in physiological and physicochemical variables were evaluated. HHP changed the postharvest physiology of fruits but did not inhibit the ripening process; the effect was dependent on the level of pressure, pressurization time, and interaction of both parameters.
Review of Scientific Instruments, 2003
A spectrometer that combines laser ablation of a solid sample with molecular-beam Fourier-transfo... more A spectrometer that combines laser ablation of a solid sample with molecular-beam Fourier-transform microwave spectroscopy (MB-FTMW) has been constructed to obtain the rotational spectrum of solid organic molecules. Laser ablation is produced by visible radiation, using the second harmonic of a Nd:YAG laser. The laser hits a solid rod placed on a specially designed pulsed nozzle, coaxially oriented with the axis of the microwave spectrometer Fabry-Pérot cavity. The vaporized molecules are seeded in the supersonic jet formed by the expansion of a carrier gas (Ar,Ne) and probed by FTMW spectroscopy. The high sensitivity of the spectrometer is exemplified with the observation of minor isotopomers in natural abundance of different organic molecules and natural amino acids. This instrument opens perspectives in the investigation of the gas phase structure of solid organic compounds.
Cyta - Journal of Food, 2012
Las altas presiones hidrostáticas (APH) se han propuesto como método cuarentenario alternativo pa... more Las altas presiones hidrostáticas (APH) se han propuesto como método cuarentenario alternativo para destruir las larvas de la mosca de la fruta Anastrepha ludens y Anastrepha obliqua que infestan al mango. Sin embargo, existe escasa información científica sobre el efecto de las APH en la fisiología poscosecha de frutos. El objetivo de este trabajo fue evaluar el efecto de la presurización en la fisiología del mango ‘Ataulfo’ durante su maduración a 25°C. Se obtuvieron mangos en madurez fisiológica, se presurizaron a 15, 30 y 60 MPa por 10 o 20 min (se mantuvo un testigo sin tratamiento). Se almacenaron durante 14 días y se evaluaron cambios fisiológicos y fisicoquímicos. Las APH modificaron la fisiología poscosecha de los frutos de forma determinante pero no inhibieron el proceso de maduración. El efecto dependió del nivel de presión, el tiempo de presurización y la interacción de ambos parámetros.High hydrostatic pressure (HHP) has been proposed as a quarantine alternative method to destroy larvae from fruit flies Anastrepha ludens and Anastrepha obliqua that infest the mango. However, there is scarce scientific information on the effect of HHP on the postharvest physiology of target fruits. The aim of this study was to evaluate the effect of pressurization of low intensity in the physiology of the mango “Ataulfo” during ripening in storage at 25°C. Mangoes were obtained in a state of physiological maturity and pressurized to 15, 30, and 60 MPa for 10 or 20 min (fruits control were maintained without treatment). Mangoes were stored for 14 days and changes in physiological and physicochemical variables were evaluated. HHP changed the postharvest physiology of fruits but did not inhibit the ripening process; the effect was dependent on the level of pressure, pressurization time, and interaction of both parameters.
Review of Scientific Instruments, 2003
A spectrometer that combines laser ablation of a solid sample with molecular-beam Fourier-transfo... more A spectrometer that combines laser ablation of a solid sample with molecular-beam Fourier-transform microwave spectroscopy (MB-FTMW) has been constructed to obtain the rotational spectrum of solid organic molecules. Laser ablation is produced by visible radiation, using the second harmonic of a Nd:YAG laser. The laser hits a solid rod placed on a specially designed pulsed nozzle, coaxially oriented with the axis of the microwave spectrometer Fabry-Pérot cavity. The vaporized molecules are seeded in the supersonic jet formed by the expansion of a carrier gas (Ar,Ne) and probed by FTMW spectroscopy. The high sensitivity of the spectrometer is exemplified with the observation of minor isotopomers in natural abundance of different organic molecules and natural amino acids. This instrument opens perspectives in the investigation of the gas phase structure of solid organic compounds.