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  • Getting Around Volatile Organic Compounds with Aqueous Cleaning Products
    Before we look at ways to avoid or eliminate Volatile Organic Compounds (VOC†TMs), we should take a minute and define what VOC†TMs are. VOCs are basically chemicals that contain carbon and evaporate at room temperature and pressure. The term includes all sorts of common solvents (e.g. mineral
  • What Type of Aerosol Cleaner Should I Choose?
    on shelves today. Water-based: These cleaners are low-cost, mostly non-flammable, and have a low VOC. However, they slowly evaporate so rust may form when cleaning metal. Flammables: Some flammables include hydrocarbons, alcohols, distillates, and terpenes. These are low cost, but the area must
  • How GEM Traps Work (.pdf)
    through the orifice moving from high to low pressure conditions. This causes a proportion of the condensate to re-evaporate as 'flash' steam within the discharge throat. This flash steam causes a turbulent flow and has two effects.
  • How to Select a Pump for Rotary Evaporation
    Evaporation is one of the most common tasks performed in a chemistry laboratory. But, how do you go about selecting the correct vacuum pump for your rotary evaporator? Or, if you already have a vacuum pump, how do you know whether it is well-suited for this application? This is important due
  • Cellulosics
    have low specific heat and low thermal conductivity -- characteristics that give them a pleasant feel. Dimensional stability of butyrate, propionate, and ethyl cellulose is excellent. Plasticizers used in these materials do not evaporate significantly and are virtually
  • Medical Device Link .
    this powerful approach of simultaneous modeling and experimentation. The large surface-to-volume ratio that is characteristic of microdevices frequently leads to unexpected process behavior. For example, microvolumes of physiological fluids evaporate, cool, and heat extremely rapidly. Modeling often
  • SMB Takes On Paclitaxel Purification
    studies led to modifications in the amount of stationary phase packed in the SMB columns, along with solvent composition, loading concentration, feed and take-off rates. The SMB process is controlled through real-time, near-line, fast HPLC analysis of the extract and raffinate evaporate streams
  • Medical Device Link .
    be produced. During the thermal drying process, the solvents in the adhesive or coating evaporate. Unless they are recovered, these vapors from the solvents can create what amounts to toxic air pollution. In contrast to heat-cured materials, substances that cross-link in the presence of ultraviolet (UV
  • Lubricants For Semiconductor Manufacturing Equipment
    molecules are prone to evaporate more readily. Additional distillation removes lighter weight materials. Though the original volume of the fluid decreases, the range of molecular weights narrows, reducing the likelihood of evaporation. Automated assembly methods have created a conundrum

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