Controlled humidity

Control humidity in operating area (as humidity increases, static potential decreases)... 

Control humidity of air in operating area to reduce accumulation of static electricity... 

Environmental conditions under which solvent release from the adhesive on the substrate is produced must be carefully controlled. Humidity is critical because loss of heat due to solvent evaporation may allow attainment of the dew point (the evaporation of the solvent is an endothermic process), and then condensation of water on the adhesive can result. This phenomenon is often called moisture blooming. The presence of water on the adhesive film causes a detrimental effect because the autoadhesion of rubber chains is greatly inhibited. Therefore, humidity must be controlled and avoided by increasing the temperature during solvent evaporation. 

Modify the environment After cleaning and disinfecting an area that is contaminated by fungal or bacterial growth, control humidity to make conditions inhospitable for regrowth. 

Galvanic corrosion of dissimilar metals can be minimized by controlling humidity near such bimetallic connections. In general, continuously dry bimetallic joints do not corrode. 

Single plates are usually cured in special devices (curing ovens or curing chambers, cf., e.g., [25] ) that control humidity as well as temperature. In continuous plate production, the drying of the pasted ribbon is correspondingly controlled. Furthermore, in continuous manufacture final curing can occur after the plates are separated and inserted into the containers. 

On the evidence given here, the tablet conditioner seemed to work well, but the geometrical positions associated with the means (1.249, 1.775) differ from those with the means (1.069. .. 1.107) indeed, five of these positions were near the entry port of the controlled-humidity airstream, and the other two were situated in comers somewhat protected from the air currents. The 1.159 group marks the boundary of the acceptable region. 

The manufacturing process is sometimes discussed in terms of the characteristics of the active ingredient, e.g., the need for nonaqueous granulation processes, the need for controlled humidity in the manufacturing environment. The number of different manufacturing sites requested is mentioned in the assessment reports. Special manufacturing processes such as extrusion/ spheronization are mentioned in the EPARs. 

Permeability of an FML is evaluated using the Water Vapor Transmission test.28 A sample of the membrane is placed on top of a small aluminum cup containing a small amount of water. The cup is then placed in a controlled humidity and temperature chamber. The humidity in the chamber is typically 20% relative humidity, while the humidity in the cup is 100%. Thus, a concentration gradient is set up across the membrane. Moisture diffuses through the membrane, and with time the liquid level in the cup is reduced. The rate at which moisture is moving through the membrane is measured. From that rate, the permeability of the membrane is calculated with the simple diffusion equation (Fick s first law). It is important to remember that even if a liner is installed correctly with no holes, penetrations, punctures, or defects, liquid will still diffuse through the membrane. 

A rational development of models for moisture uptake begins with a description of the experimental procedure used to determine moisture uptake as a function of time. The first step in the experiment is to control the relative humidity to which a sample will be exposed. One technique to control humidity is to use saturated salt solutions. When placed in a closed system and held at a constant temperature, a saturated aqueous salt solution will provide a constant humidity (RH0) within that system. Table 1 lists relative humidities that will be maintained over various saturated salt solutions [14],... 

Controlled expansion alloys, 13 520-522 Controlled flavor release systems, 11 528, 543-553, 554-555 characteristics of, ll 544t demand for, 11 555 developments in, 11 558 elements of, 11 555-557 extrusion encapsulation for, 11 550 key aspects of, 11 556t morphologies of, 11 545 Controlled free-radical polymerization, block copolymers, 7 646 Controlled humidity drying, ceramics processing, 5 655-656 Controlled indexing, 18 241 Controlled initiation, 14 268-269 Controlled laboratory studies, in... 

Provide a safe, secure, and controlled storage location for the physical data. Consider special storage features that might be needed such as temperature control, humidity control, wrapping, and others. Prepare the parts for further evaluation and avoid actions that may destroy or degrade data. 

Most microarray printers are now housed in boxes set up to control humidity and many are provided with high efficiency particulate air (HEFA) filtration to remove particulates. However, a word of caution attempting to nm a HEFA filter along with a humidifier may be counter-productive if the humid air is exhausted by the HEFA system. Check the design of the environmental chamber to verify whether both devices can be used during a print nm. 

Cobalt(II) chloride was dissolved in poly(amide acid)/ N,N-dimethylacetamide solutions. Solvent cast films were prepared and subsequently dried and cured in static air, forced air or inert gas ovens with controlled humidity. The resulting structures contain a near surface gradient of cobalt oxide and also residual cobalt(II) chloride dispersed throughout the bul)c of the film. Two properties of these films, surface resistivity and bullc thermal stability, are substantially reduced compared with the nonmodified condensation polyimide films. In an attempt to recover the high thermal stability characteristic of polyimide films but retain the decreased surface resistivity solvent extraction of the thermally imidized films has been pursued. 

Provided using saturated aqueous solutions of MgBr2, controlled humidity cabinets. KNO2, NaBr, NaQ, KNO3, respectively, or... 

The solution part, SDS-PAGE part, and storage site are placed on the left, center, and right of the Peltiert devices, respectively. The parts are located in a closed box under controlled humidity and thermal conditions. 

To demonstrate the capability of the air handling system to control humidity at the specified level for each room... 

Thermogravimetric analyses were carried out in 10°-30° temperature increments with 200-mg samples using a conventional (Mauer) TGA system. Automatic recording of weight change was used to follow reaction to equilibrium, but actual weighings were recorded only by manual operation. The sample was bathed continuously in air of controlled humidity (Pmo = 7.9 torr) flowing at 180 cc/min. Precautions were taken to minimize drafts and convective currents, and buoyancy correction curve was made to 950°C. Further details on experimental methods are available (12). 

Thermal (A) High temperature—approach or exceed the melting point of solids autoclaving solutions. (B) Low temperature-usually below 100°C and may be conducted in a controlled humidity environment. 

Instead of putting the desiccant inside the dish, with a controlled humidity outside, the dish could contain water which is then transmitted out into a dry atmosphere and the amount transmitted measured by weight loss. By inverting the container, the transmission rate when the water is in contact with the test piece can also be measured. The transmission rates measured by the various alternative procedures will be different because different vapour pressure gradients across the test piece are being used and, logically, the conditions most relevant to service would be chosen. 

Method. The organothiophosphorus insecticides are separated on silica gel with hexane-acetone (2 1 or 3 1). The plate is dried in air and sprayed with a solution of calcein-palladium chloride (0.0005 M palladium chloride in 0.1 M hydrochloric acid mixed with an equal volume of 10-3 Af calcein, adjusted to pH 7.2 with phosphate buffer and diluted with water to obtain a 2.0 10 4Af solution of palladium equilibrated overnight) which is diluted 1 1 with a 50% solution of acetone—water. When the plate is translucent it is dried in air and stored for 18—24 h in a closed chromatographic tank containing a beaker of a saturated solution of calcium nitrate tetrahydrate. This procedure permits the full fluorescence to develop under controlled humidity. The plate is then observed under a UV light at 365 nm, or scanned quantitatively at 365 nm (excitation) and 518 nm (emission). 

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