Pesticides are derived from the Greek word pestis - pest, cido to destroy, and substances used exterminate, repel or reduce plant pests act as growth regulators, well nitrogen stabilizers, defoliants, desiccants. primarily in agriculture, but about half of 200 pesticides registered today widely by non-agricultural organizations such hospitals, restaurants, decontamination services. Pesticide mi...

Silica aerogels are frequently employed as solid desiccants in enthalpy wheels for dehumidifying the supply stream in air-conditioning systems. These desiccant materials possess good moisture adsorption and desorption characteristics due to their porous structure. Analysis of adsorption and desorption isotherms is critical for performance characterization and is often performed to evaluate the ...

In order to provide a comfortable living and working environment indoors in tropical countries, the outdoor air often needs to be cooled and dehumidified before it enters the rooms. Membrane separation is an emerging technology for air dehumidification and it is based on the solution diffusion mechanism. Water molecules are preferentially permeating through the membranes due to its smaller kine...

Comfortable, efficient, and affordable heating, ventilation, and air conditioning systems in buildings are highly desirable due to the demands of energy efficiency and environmental friendliness. Traditional vapor-compression air conditioners exhibit a lower coefficient of performance (COP) (typically 2.8-3.8) owing to the cooling-based dehumidification methods that handle both sensible and lat...

As the freshwater crisis looms, metal-organic frameworks (MOFs) with stepped isotherms lie at forefront of desiccant development for atmospheric water harvesting (AWH). Despite numerous studies on sorption kinetics in MOF desiccants, AWH sorbents are a challenge to quantify. Here, we report that seven known MOFs and industry-standard Syloid limited by diffusion sorbent bed surface. A quantitati...

Cup experiments are the most widely used method to measure water vapor permeability of porous building materials. For this test, cup assembly is designed create a pressure gradient across sample and, thus, allow diffusion through it. Water assessed by weighing over time. While external conditions generally well controlled, appropriate solid desiccants or saturated salt solutions control inside ...

Desiccants can be used in conjunction with solar energy to provide a viable alternative to traditional air conditioning techniques. Liquid desiccant regeneration was proved to be an effective method to extract the moisture from solution with a relatively less energy in order to regenerate the desiccant. An experimental study was carried out to analyze the effect of temperature for regeneration ...

The validness of the expiration dates (validity period) that manufacturers provide on food product labels is a crucial food safety problem. Governments must study how to use their authority by implementing fair awards and punishments to prompt manufacturers into adopting rigorous considerations, such as the effect of adopting new storage methods for extending product validity periods on expecte...