Synthetic type

Alternatively an ice-cold dilute solution of sodium peroxide is passed through a column containing a cation-exchanger of the synthetic type (p. 274) where the cation is hydrogen (i.e. H3O then exchange occurs ... 

Fig. 3. Model of the crystal structure of the mineral mordenite showing the main channel formed by 12-membered ring and small channels which contain some of the sodium cations. Synthetic types of mordenite exhibit the adsorption behavior of a 12-membered ring, whereas the mineral does not, probably...

Ultrasonic Properties. Vitreous sihca of high purity, such as the synthetic type, has an unusually low attenuation of high frequency ultrasonic waves. The loss, is a linear function of frequency, up to the 30—40 MHz region and can be expressed a.s A = Bf, where B = 0.26 dB-MHz/m for shear waves and 0.16 dB-MHz/m for compressional waves (168). 

Resins can be divided into natural and synthetic types. Natural resins have a vegetable or animal origin. Typical examples are rosins. Synthetic resins result from controlled chemical reactions, and can be divided into two subgroups. 

Infergen (rIFN-a, synthetic type I Amgen (USA) Chronic hepatitis C... 

The 3H chemical shifts, coupling constants, temperature coefficients, exchange rates and inter-residual ROEs of the hydroxyl protons of various synthetic type II trisaccharides, analogues of (3-D-Galp-(l - 4)-p-D-GlcpNAc-(l - 2)-a-D-Man-(l - 0)(CH2)7CH3, were reported and interpreted,8 assisted with molecular dynamic simulations, to deduce key information on the conformational behavior of these important molecules in aqueous solution. 

Infergen (rIFN-a, synthetic type 1 interferon produced in E. coli) Amgen (USA), Yamanouchi Europe (EU) Chronic hepatitis C 1997 (USA), 1999 (EU)... 

At the outbreak of World War II a synthetic-type cracking catalyst (22) was made available and the quality of the gasoline produced was further improved. The production of this aviation fuel added greatly to the over-all output of finished aviation gasoline (18). Even so, the availability of the components of commercial iso-octanes and alkylates was limiting. 

For use in commercial plants, the natural-type catalyst is produced as pellets approximately 4 mm. in diameter and length. The synthetic-type catalyst finds general... 

Figure 9. Thermal Stability of Natural Clay and Synthetic Types of Catalyst...

Both the natural clay and the synthetic types of catalyst undergo normal aging. Abnormal aging, due to sulfur compounds, has been found only with natural clay catalyst the synthetic types are stable under similar conditions. Natural clay catalysts can be protected against abnormal aging from sulfur compounds by hydrating with steam after regeneration. Certain types of iron-free clays and bentonitic clays treated to remove iron do not show sulfur deactivation. 

Synthetic polymers based on polyesters and co-polyesters are some of the most expensive biopolymers. Feedstock is expensive compared with biopolymers based on renewable resources and the production process is more complex and costly. Synthetic types can cost up to three times the price of commodity polymers such as polyethylene and polypropylene. 

VIII. Appendix Listing of the Named Reactions by Synthetic Type and by their Utility...502... 

Table 2 Concentration values synthetic type reference material. Grav. M, gravimetric method Flamp. M, flame photometry Ion S. M, ion selective method Cont. F, continuous flow Spp. M,...

Table 1 Concentration values synthetic type reference material sera...

Note that the molar concentration values are relevant to decision levels where accurate measurement is crucial for medical decision. The category of synthetic-type reference material sera needs to be certified by means of primary methods. According to international regulations [6], the methods of certification of the clinical reference materials followed several steps regarding the preparation of the material, homogeneity testing, performance of interlaboratory analyses, assignment of the certified value and uncertainty. 

They are common and extremely effective catalysts. Many zeolites occur naturally, but synthetic types are tailor-made for special purposes and have particular catalytic functions. 

Castor. Perfume fixative obtained from secretions of the beaver. Synthetic types are available. 

Use Oxidizing agent, depolarizer in dry cell batteries (African and synthetic types only), pyrotechnics, matches, etc., catalyst, laboratory reagent, scavenger and decolorizer, textile dyeing, source of metallic manganese (as pyrolusite). 

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