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Reverse osmosis membranes and other processes: differences

While many times have you wanted to label as a process of osmosis filtration on a molecular scale is easy to understand and realize ... And the most precious advantage: it adapts to all types of applications: waste water, process water, Pure Drinking, Health, Biological, ...

Story - antoq - 02/04/2010 - 06:20 - 0 comments - 0 attachments

Reverse osmosis and drinks

One of the most important and innovative water treatment process is reverse osmosis. The procedure is a real physical phenomenon, and through the ... materials. As stated above, one of the most important applications of reverse osmosis process has to do with the drinks industry, ...

Story - antoq - 02/15/2010 - 07:28 - 0 comments - 0 attachments

Application of ultrafiltration in the dairy industry

One type of more effective water treatment today is ultrafiltration, a process which ... without high molecular weight. The same has different applications, such as a prefilter for reverse osmosis. Furthermore, this water treatment is applied to purify ...

Story - antoq - 02/23/2010 - 08:00 - 0 comments - 0 attachments

PDS Biotechnology closed a licensing agreement to use the enantiomers of Merck Eprova

PDS Biotechnology announced that the company has obtained an exclusive license to use Merck AG Eprova the lipid DOTAP enantiomer Chloride Merck Eprova patented in Versamune (TM)-HPV and other products in development based on technology Versamune ( TM). The use of DOTAP Chloride pure enantiomer shows an improved adjuvant activity compared with the competition. Eprova AG Merck offer DOTAP Chloride pure enantiomer in cGMP produced for use in clinical and commercial drug products developed with nano technology Versamune (TM) PDS Biotechnology. PDS Biotechnology possess intellectual property rights for products that incorporate lipids DOTAP enantiomers for immunotherapeutic applications.


PDS Biotechnology announced that the company has obtained an exclusive license to use Merck AG Eprova the lipid DOTAP enantiomer Chloride Merck Eprova patented in Versamune (TM)-HPV and other products in development based on technology Versamune ( TM). The use of DOTAP Chloride pure enantiomer shows an improved adjuvant activity compared with the competition. Eprova AG Merck offer DOTAP Chloride pure enantiomer in cGMP produced for use in clinical and commercial drug products developed with nano technology Versamune (TM) PDS Biotechnology. PDS Biotechnology possess intellectual property rights for products that incorporate lipids DOTAP enantiomers for immunotherapeutic applications.

Ebook Forward and inverse analysis of chemical transport models

Assessing the discrepancy between modeled and observed distributions of aerosols is a persistent problem on many scales. Tools for analyzing the evolution of aerosol size distributions using the adjoint method are presented in idealized box model calculations. The ability to recover information about aerosol growth rates and initial size distributions is assessed given a range of simulated observations of evolving systems. While such tools alone could facilitate analysis of chamber measurements, improving estimates of aerosol sources on regional and global scales requires explicit consideration of many additional chemical and physical processes that govern secondary formation of atmospheric aerosols from emissions of gas-phase precursors. The adjoint of the global chemical transport model GEOS-Chem is derived, affording detailed analysis of the relationship between gas-phase aerosol precursor emissions (SOx, NOx, and NH3) and the subsequent distributions of sulfate - ammonium - nitrate aerosol. Assimilation of surface measurements of sulfate and nitrate aerosol is shown to provide valuable constraints on emissions of ammonia. Adjoint sensitivities are used to propose strategies for air quality control, suggesting, for example, that reduction of SOx emissions in the summer and NH3 emissions in the winter would most effectively reduce non-attainment of aerosol air quality standards. The ability of this model to estimate global distributions of carbonaceous aerosol is also addressed. Based on new yield data from environmental chamber studies, mechanisms for incorporating the dependence of secondary organic aerosol (SOA) formation on NOx concentrations are developed for use in global models. When NOx levels are appropriately accounted for, it is demonstrated that sources such as isoprene and aromatics, previously neglected as sources of aerosol in global models, significantly contribute to predicted SOA burdens downwind of polluted areas (owing to benzene and toluene) and in the free troposphere (owing to isoprene).


Assessing the discrepancy between modeled and observed distributions of aerosols is a persistent problem on many scales. Tools for analyzing the evolution of aerosol size distributions using the adjoint method are presented in idealized box model calculations. The ability to recover information about aerosol growth rates and initial size distributions is assessed given a range of simulated observations of evolving systems. While such tools alone could facilitate analysis of chamber measurements, improving estimates of aerosol sources on regional and global scales requires explicit consideration of many additional chemical and physical processes that govern secondary formation of atmospheric aerosols from emissions of gas-phase precursors. The adjoint of the global chemical transport model GEOS-Chem is derived, affording detailed analysis of the relationship between gas-phase aerosol precursor emissions (SOx, NOx, and NH3) and the subsequent distributions of sulfate - ammonium - nitrate aerosol. Assimilation of surface measurements of sulfate and nitrate aerosol is shown to provide valuable constraints on emissions of ammonia. Adjoint sensitivities are used to propose strategies for air quality control, suggesting, for example, that reduction of SOx emissions in the summer and NH3 emissions in the winter would most effectively reduce non-attainment of aerosol air quality standards. The ability of this model to estimate global distributions of carbonaceous aerosol is also addressed. Based on new yield data from environmental chamber studies, mechanisms for incorporating the dependence of secondary organic aerosol (SOA) formation on NOx concentrations are developed for use in global models. When NOx levels are appropriately accounted for, it is demonstrated that sources such as isoprene and aromatics, previously neglected as sources of aerosol in global models, significantly contribute to predicted SOA burdens downwind of polluted areas (owing to benzene and toluene) and in the free troposphere (owing to isoprene).

Reverse osmosis membranes and other processes: differences

While many times have you wanted to label as a process of osmosis filtration on a molecular scale is easy to understand and realize that reverse osmosis is a process clearly differentiated from the micro filtration or filtration.

There are three aspects which indicate clearly that this difference:
1. In the process of filtering the entire flow passes through the separator element. This only prevents the passage of solid particles of a predetermined size.
2. By contrast, reverse osmosis, only a portion of the feed rate through the membrane and constitutes the product. The remaining flow is discharged without passing through the membrane and becomes the rejection.
3. In reverse osmosis, never separated material accumulates on the surface of the membrane, as occurs in other processes, as is the rejection which is responsible for the drag of the material.
4. While the osmosis seawater flow is parallel to the membrane, filtration is perpendicular.


While many times have you wanted to label as a process of osmosis filtration on a molecular scale is easy to understand and realize that reverse osmosis is a process clearly differentiated from the micro filtration or filtration.

There are three aspects which indicate clearly that this difference:
1. In the process of filtering the entire flow passes through the separator element. This only prevents the passage of solid particles of a predetermined size.
2. By contrast, reverse osmosis, only a portion of the feed rate through the membrane and constitutes the product. The remaining flow is discharged without passing through the membrane and becomes the rejection.
3. In reverse osmosis, never separated material accumulates on the surface of the membrane, as occurs in other processes, as is the rejection which is responsible for the drag of the material.
4. While the osmosis seawater flow is parallel to the membrane, filtration is perpendicular.

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