water content


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water content 

Water in a contact lens expressed as a percentage of the total mass of the lens in its hydrated state under equilibrium conditions with physiological saline solution containing 9 g/l sodium chloride at a temperature of 20 ± 0.5ºC and with a stated pH value.
where M is the mass of hydrated lens, m is the mass of dry lens.The US Food and Drug Administration (FDA) has categorized hydrogel contact lenses into four groups according to their water content and their surface reactivity (referred to as ionic if it contains more than 0.2% ionic material, and nonionic otherwise). Group 1: water content less than 50% and non-ionic. Group 2: water content greater than 50% and non-ionic. Group 3: water content less than 50% and ionic. Group 4: water content greater than 50% and ionic.
References in periodicals archive ?
[1] claimed that the dielectric constant, at frequencies in the range 1 MHz to 1 GHz, depends on the volumetric water content and can be determined empirically.
However, current cartilage alternatives aren't able to create this unique combination; they're designed to replicate the physical characteristics of cartilage and neglect the water content. This is problematic because the water in our cartilage allows for the transport of important cell nutrients.
However, most species have seeds that are classified as orthodox, which can tolerate desiccation untill the water content reduces to 2-5%, depending on the species.
To maximise fluid intake, opt for foods with high water content during Iftar and Suhoor.
When the normal water content of your body is reduced, it upsets the balance of minerals (salts and sugar) in your body, which affects the way it functions.
Scientists at The Ohio State University looked at how increasing water content may affect the structure of oleogel matrices, and how the addition of an emulsifier can influence the gel's behavior.
In addition, the rice storage temperature, the water content, and other factors will also influence the result of emulsifiers.
Consequently, the correspondent optimum water content ([[theta].sub.op]) should be maintained within the interval as follows:
SoPoWake Autonomous Landslide Surveillance System uses soil water content sensors to monitor the water content in soils and generates alert messages over a wireless network to provide early warnings of possible imminent occurrence of mudslides.