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Diana Penagos-Calvete,Jonathan Guauque-Medina,María Francisca Villegas-Torres,Guillermo Montoya 한국원예학회 2019 Horticulture, Environment, and Biotechnology Vol.60 No.2
Capsicum is currently one of the highest value vegetable crops due its richness in vitamins and antioxidants and is frequentlycommercialized as fresh fruit, dry crushed pepper, paprika oleoresin or pepper paste. The chemical content comprisescarotenoids, fl avonoids, lipid molecules like fatty acids, triacylglycerides and capsaicinoids as its principal chemotaxonomicmarkers. However, triacylglycerides and carotenoids are no frequently taken into analytical spectrometric methods due tononvolatile and extreme low polarity properties. Those molecules are usually extracted and commercialized as oleoresin,and there are gaining attention because it helps to combat nutrient defi ciencies. This study monitors the behavior of thepungency value in two real industrial productive crops of Capsicum frutescens (tabasco) and Capsicum annuum (cayenne)during a complete harvest period. A comparison of chemical carotenoid and triacylglycerides profi le was carried out byUPLC–PDA–ESI–MS between Capsicum frutescens (tabasco), Capsicum chinense (habanero), Capsicum annuum (jalapeño),and Capsicum annuum (serrano) in two diff erent ripening stages. The authors’ main fi nding is a strong correlation betweenplant age and pungency level independent of the size and dehydration state of the fruits. The major carotenoid content wasfounded in red Tabasco variety, and 12 triacylglycerides and 10 esterifi ed carotenoids are reported along the all fruits treated. Our results present an important and alternative fi nding for agro-industrial chili pepper producers and marketers who need tobetter understand the behavior of the pungency value as the principal quality feature, and to discover added-value chemicalslike TAG and carotenoids in their products.
Kim, K. H.,Watson, Dan M.,Manoj, P.,Forrest, W. J.,Furlan, Elise,Najita, Joan,Sargent, Benjamin,Herná,ndez, Jesú,s,Calvet, Nuria,Adame, Lucí,a,Espaillat, Catherine,Megeath, S. T.,Muz American Astronomical Society 2016 The Astrophysical journal Supplement series Vol.226 No.1
<P>We present our investigation of 319 Class II objects in Orion A observed by Spitzer/IRS. We also present the follow-up observations of 120 of these Class II objects in Orion A from the Infrared Telescope Facility/SpeX. We measure continuum spectral indices, equivalent widths, and integrated fluxes that pertain to disk structure and dust composition from IRS spectra of Class II objects in Orion A. We estimate mass accretion rates using hydrogen recombination lines in the SpeX spectra of our targets. Utilizing these properties, we compare the distributions of the disk and dust properties of Orion A disks with those of Taurus disks with respect to position within Orion A (Orion Nebular Cluster [ONC] and L1641) and with the subgroups by the inferred radial structures, such as transitional disks (TDs) versus radially continuous full disks (FDs). Our main findings are as follows. (1) Inner disks evolve faster than the outer disks. (2) The mass accretion rates of TDs and those of radially continuous FDs are statistically significantly displaced from each other. The median mass accretion rate of radially continuous disks in the ONC and L1641 is not very different from that in Taurus. (3) Less grain processing has occurred in the disks in the ONC compared to those in Taurus, based on analysis of the shape index of the 10 mu m silicate feature (F-11.3/F-9.8). (4) The 20-31 mu m continuum spectral index tracks the projected distance from the most luminous Trapezium star, theta(1) Ori C. A possible explanation is UV ablation of the outer parts of disks.</P>
The Millimeter Continuum Size-Frequency Relationship in the UZ Tau E Disk
Tripathi, Anjali,Andrews, Sean M.,Birnstiel, Tilman,Chandler, Claire J.,Isella, Andrea,Pé,rez, Laura M.,Harris, R. J.,Ricci, Luca,Wilner, David J.,Carpenter, John M.,Calvet, N.,Corder, S. A.,Del American Astronomical Society 2018 The Astrophysical journal Vol.861 No.1
<P>We present high spatial resolution observations of the continuum emission from the young multiple star system UZ Tau at frequencies from 6 to 340 GHz. To quantify the spatial variation of dust emission in the UZ Tau E circumbinary disk, the observed interferometric visibilities are modeled with a simple parametric prescription for the radial surface brightnesses at each frequency. We find evidence that the spectrum steepens with radius in the disk, manifested as a positive correlation between the observing frequency and the radius that encircles a fixed fraction of the emission (R-eff proportional to nu(0.34 +/- 0.08)). The origins of this size-frequency relation are explored in the context of a theoretical framework for the growth and migration of disk solids. While that framework can reproduce a similar size-frequency relation, it predicts a steeper spectrum than that observed. Moreover, it comes closest to matching the data only on timescales much shorter (<= 1 Myr) than the putative UZ Tau age (similar to 2-3 Myr). These discrepancies are direct consequences of the rapid radial drift rates predicted by models of dust evolution in a smooth gas disk. One way to mitigate that efficiency problem is to invoke small-scale gas pressure modulations that locally concentrate drifting solids. If such particle traps reach high-continuum optical depths at 30-340 GHz with a similar to 30%-60%. filling fraction in the inner disk (r less than or similar to 20 au), they can also explain the observed spatial gradient in the UZ Tau E disk spectrum.</P>
Quasifree Neutron Knockout from Ca54 Corroborates Arising N=34 Neutron Magic Number
Chen, S.,Lee, J.,Doornenbal, P.,Obertelli, A.,Barbieri, C.,Chazono, Y.,Navrá,til, P.,Ogata, K.,Otsuka, T.,Raimondi, F.,Somà,, V.,Utsuno, Y.,Yoshida, K.,Baba, H.,Browne, F.,Calvet, D.,Ch&ac American Physical Society 2019 Physical Review Letters Vol.123 No.14