Mathematical modeling of drying process of unripe banana slices

Unripe banana flour (UBF) production employs bananas not submitted to maturation process, is an interesting alternative to minimize the fruit loss reduction related to inappropriate handling or fast ripening. The UBF is considered as a functional ingredient improving glycemic and plasma insulin levels in blood, have also shown efficacy on the control of satiety, insulin resistance. The aim of this work was to study the drying process of unripe banana slabs (Musa cavendishii, Nanicão) developing a transient drying model through mathematical modeling with simultaneous moisture and heat transfer. The raw material characterization was performed and afterwards the drying process was conducted at 40 ºC, 50 ºC e 60 ºC, the product temperature was recorded using thermocouples, the air velocity inside the chamber was 4 m·s-1. With the experimental data was possible to validate the diffusion model based on the Fick\'s second law and Fourier. For this purpose, the sorption isotherms were measured and fitted to the GAB model estimating the equilibrium moisture content (Xe), 1.76 [g H2O/100g d.b.] at 60 ºC and 10 % of relative humidity (RH), the thermophysical properties (k, Cp, ?) were also measured to be used in the model. Five cases were contemplated: i) Constant thermophysical properties; ii) Variable properties; iii) Mass (hm), heat transfer (h) coefficient and effective diffusivity (De) estimation 134 W·m-2·K-1, 4.91x10-5 m-2·s-1 and 3.278?10-10 m·s-2 at 60 ºC, respectively; iv) Variable De, it presented a third order polynomial behavior as function of moisture content; v) The shrinkage had an effect on the mathematical model, especially in the 3 first hours of process, the thickness experienced a contraction of about (30.34 ± 1.29) % out of the initial thickness, finding two decreasing drying rate periods (DDR I and DDR II), 3.28x10-10 m·s-2 and 1.77x10-10 m·s-2, respectively. COMSOL Multiphysics simulations were possible to perform through the heat and mass transfer coefficient estimated by the mathematical modeling.

Evidence-Based Practice in the Juvenile Justice System: Balancing Clinical Expertise with Best Available Research and Client Variables

Each year, thousands of adolescents are processed through the juvenile justice system -- a system that is complicated, expensive, and inadequately addressing the needs of the youth in its care. While there is extensive literature available in support of interventions for youthful offenders that are clinically superior to current care and more cost-effective than the existing structure, there is a gap between research and practice that is preventing their implementation. The use of Evidence-Based Practice in Psychology (EBPP) as defined by the American Psychological Association is presented as one method to bridge this gap. This paper identifies and discusses each of five barriers to effective use of EBPP: cost, fragmentation of the mental health system, historical and systemic variables, research methodology, and clinician variables. These barriers are first defined and then illustrated using examples from the author's experience working in the juvenile justice field. Finally, recommendations for the field are presented.

Correlates of Program Completion in Juvenile Diversion

The current study evaluated the State Juvenile Diversion Program, managed by the District Attorney’s (DA) office in Denver Colorado. The purpose of this study was to review factors, which potentially contribute to success or failure in diversion. Research in diversion programing typically focuses on recidivism rates, but fails to examine which factors contribute to program completion. The analysis was conducted using data from 57 juveniles who entered the DA diversion program in 2015. This represents the majority of juveniles in the diversion program rather than a sample. The current study confirmed prior research findings that those juveniles who do not successfully complete a diversion program are more likely to reoffend. Additionally, the factors which were significantly correlated with successful completion of the diversion program were grade point average (GPA) and number of municipal tickets. The number of behavior reports in school before and after the Diversion program was significantly lower for both groups. Non-significant findings are also discussed as they may help guide future research.

How one juvenile court helps to make child labor legislation effective

by Mabel Brown Ellis.

Juvenile Delinquents, Washington, D.C., 1935 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Spot map showing residences of juvenile delinquents in the District of Columbia as of July 1, 1935. Data furnished by Juvenile Court of the District of Columbia. It was published in 1936. Scale [ca. 1:19,200]. Base map "Complete to June 13, 1933." The image inside the map neatline is georeferenced to the surface of the earth and fit to the Maryland State Plane Coordinate System Meters NAD83 (Fipszone 1900). All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows location of juvenile delinquents' residences by race and sex. Shows also features such as block numbers and alley dwelling areas, roads, railroads and stations, drainage, selected public buildings and points of interest, parks, cemeteries, and more. This layer is part of a selection of digitally scanned and georeferenced historic maps from The Harvard Map Collection as part of the Imaging the Urban Environment project. Maps selected for this project represent major urban areas and cities of the world, at various time periods. These maps typically portray both natural and manmade features at a large scale. The selection represents a range of regions, originators, ground condition dates, scales, and purposes.

Chlorophyll catabolism and gene expression in the peel of ripening banana fruits

The biochemical and molecular basis of chlorophyll (Chl) catabolism in bananas was investigated during ripening at 20°C and at an elevated temperature (35°C) where degreening is inhibited. Biochemical analysis showed that Chl breakdown products could be isolated from fruit ripened at both temperatures. The coloured breakdown products, chlorophyllide and pheophorbide, were not detected at any stage of ripening in the two treatments; however, a non-fluorescent Chl catabolite accumulated to a higher concentration at 20 than at 35°C. To investigate the ripening-related gene expression associated with these changes, a cDNA library was generated from the peel of fruit ripened at 20°C. Differential screening of this library produced 20 non-redundant families of clones including those encoding enzymes involved in ethylene biosynthesis, respiration, starch metabolism, cell wall degradation and other metabolic events. The expression of these genes was followed by northern analysis in fruit ripened at 20 and 35°C.