China
Africa
Explore chapters and articles related to this topic
One and Two Restrictions on Randomization
Published in Daryl S. Paulson, Applied Statistical Designs for the Researcher, 2003
Blocking is a technique used to control variability by creating individual blocks of data that are as homogeneous as possible. Examples of blocking include subjects (blocks) receiving multiple treatments that do not interact; an experiment using humans in blocks based on same weight class or liver function rates; blocks of animals based on same sex, weight, class, or litter; brands of cars (as blocks) when evaluating four different tire brands; a chemical reaction rate experiment involving four catalyst treatments using six different batches of chemical ingredients (blocks); or measuring the durability of six different paints (treatments) on each of five different wood coupons (blocks).
Development, characterisation and efficacy evaluation of biochemical fungicidal formulations for postharvest control of anthracnose (Colletotrichum gloeosporioides Penz) disease in mango
Published in Journal of Microencapsulation, 2019
Amarjeet Kumar, Vithal Balavant Kudachikar
Storage at ambient temperature influence the stability of volatile molecules in several respects: usually, chemical change due to the temperature dependent reaction rate as stated by Arrhenius equation (Atkins 2002). Van’t Hoff law specified that a temperature rise of 10 °C the chemical reaction rate would be double, a reaction can be consulted the to predict the stability of volatile molecules at different temperature (Glasl 1975). Therefore, both autoxidation and decomposition of hydro peroxides occurred with increasing with temperature and contribute to the formation of free radicals (Choe and Min 2006). In general, monitoring of volatile molecules and essential oil composition demonstrated that stability losses with an extended storage period as well as a temperature rise from lower to ambient (Turek and Stintzing 2013). In our result concentration of volatile molecules reduced during storage period as shown in Tables 3 and 4 that follow the first order of reaction. But the loss of volatile molecules concentration did not occurs due to chemical change because there was no other molecules pick found apart from our volatile molecules in the gas chromatogram during storage period observation. The loss in volatile molecule concentration in VMECs were occurred due to evaporation (El-Nikeety et al. 1998). Stated complementing GC measurements with the assessment of varied physicochemical properties of essential oils and their constituents from parsley, anise, caraway, and cumin that kept under various storage conditions. Same results reported for changes in chemical composition. The chemical changes were quite ambiguous and might be the result of evaporation rather than mere oxidative degradation.