Aloe-Gel Coating for Delaying Physicochemical Change of Fresh-Cut Mango

Fresh-cut arumanis mango is current popular product, stimulated by lifestyle and community needs for quality fruit with little preparation. Stripping and cutting spur the damage of fresh-cut mangoes faster than whole mangoes. Aloe vera gel coating as an alternative to maintain the characteristics of fresh-cut mangoes and extend shelf life. This study aims to delaying the physicochemical change of fresh-cut mango with aloe vera edible coating. The design used is a completely randomized design (CDR) of two factors, namely the ratio of dilution of aloe vera gel with aquadest 1:0, 1:1 and 1:2. Factor II, duration of immersion 1, 2 and 3 minutes with observations on the 5th and 10th days stored at cold temperatures (7± 1) °C. Observation variables include physical properties, namely weight loss, color and texture. Whereas observations of chemical properties, namely pH, total solubvle solid, water content and vitamin C. The best results were obtained in a combination of 1:1 aloe vera gel with 3 minutes immersion with a weight loss value of 1.40%, color b (∆E) 63.12, texture 6.82N, pH 4.65, TSS 24.60°Brix, moisture content 83.51% and vitamin C 35.60mg/100g).

Three-dimensional simulation of acidizing process in carbonate rocks using the Darcy–Forchheimer framework

Acidizing is an economical and effective practice to remove the near wellbore damage, which is performed by injecting acid into the formation through the wellbore. The injected acid dissolves the rock, by which the permeability nearby the wellbore can be improved. For a carbonate reservoir, the injected acid dissolves some of the minerals and some narrow and long channels, named wormholes, are formed then. These wormholes can bypass the damaged zone and hence improve the productivity of the well. The process for acid dissolving rocks involves complex physicochemical change, including the chemical reactions at the pore scale and the fluid flow at Darcy scale. In this paper, a 3-D reactive flow model with non-Darcy framework is developed based on the two-scale continuum model, and is solved by using the finite volume method. Five types of dissolution patterns, named face dissolution, conical wormhole, wormhole, ramified wormhole, and uniform dissolution, are obtained as the injection velocity increases. The effect of non-Darcy flow on dissolution pattern and breakthrough volume is analyzed. It is found that there is no effect of non-Darcy on dissolution structure and breakthrough volume when the injection velocity is very low. However, when the injection velocity is very high, the generated wormhole has more branches when using the Forchheimer equation than using the Darcy equation. Moreover, the optimal injection velocity is found to be the same whether considering the non-Darcy flow or not.

Physicochemical Compatibility of Agrochemical Mixtures in Spray Tanks for Paddy Field Rice Crops

ABSTRACT: The use of pesticide mixtures constitutes a relatively common practice in rice crops. Thus, the aim of this work was to evaluate the physicochemical interaction among different pesticide tank mixes for use in paddy field rice. The study has followed technical standards specified in ABNT [Associação Brasileira de Normas Técnicas (Brazilian National Standards Organization)] NBR [Norma Brasileira Regulamentadora (Brazilian Regulatory Standard)] NBR 13875:2014 for the assessment of physicochemical compatibility by means of a dynamic technique. Treatments consisted of mixtures of 12 pesticides, which constituted 16 treatments, six of which are composed by mixing herbicides, six by mixing herbicide and insecticide, one by mixing fungicides, and three by mixing fungicide and insecticide. Tank mixtures among herbicides Clincher® + Ricer®, Clincher® + Kifix®, Clincher® + Imazethapyr Plus Nortox®, Clincher® + Ricer® + Kifix®, Clincher® + Ricer® + Sirius® 250 CS, Imazethapyr Plus Nortox® + Basagran® 600, between herbicides and insecticides Clincher® + Ricer® + Arrivo® 200 EC, Clincher® + Kifix® + Arrivo® 200 EC, Clincher® + Imazethapyr Plus Nortox® + Arrivo® 200 EC, Clincher® + Ricer® + Kifix® + Arrivo® 200 EC, Clincher® + Ricer® + Sirius® 250 CS + Arrivo® 200 EC, Imazethapyr Plus Nortox® + Basagran® 600 + Arrivo® 200 EC, among fungicides Alterne® + Bim® 750 BR + Priori® 250 CS, and between fungicides and insecticides Bim® 750 BR + Actara® 250 WG, Alterne® + Bim® 750 BR + Priori® 250 CS + Actara® 250 WG, and Alterne® + Bim® 750 BR + Priori® 250 CS + Talisman® did not present any physicochemical change in the spray mix and are therefore compatible to be used in mixtures in the spray tank in plant treatments in rice crops.