Examination of rupture from 1372-H (RM 454)

Gruber, W.

doi:10.2172/10153824

Cited by 3 publications

(4 citation statements)

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“…These SM gels have already been shown to be useful hydrophilic carriers €or the immobilization of chelating groups, reagents, and catalytic active groups for applications in aqueous media. [32][33][34][35][36] Bactericidal groups were bonded to 4 directly as well as by hydrophobic and hydrophilic spacers.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and antibacterial activity of immobilized quaternary ammonium salts

Augusta

Gruber

Streichsbier

1994

J of Applied Polymer Sci

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SYNOPSISQuaternary ammonium salts were immobilized on hydrophilic gels based on sucrose methacrylates ( SM) and tested for their antibacterial properties. The cross-linked polymers were prepared by copolymerization of monomer-SM mixtures with 4-vinylpyridine and subsequent quaternization with 1-bromoctane and 1-bromoctadecan and by esterification of SM gels with 3-pyridine carboxylic acid chloride and quaternization. In addition, immobilized quaternary salts bonded by hydrophobic as well as by hydrophilic spacers were synthesized by esterification of SM gels with 11-bromundecanoic acid chloride and the tetraethylene glycol-based acid chloride 13c, respectively, and subsequent reaction of the halogen-substituted gels with tertiary amines. Suspension tests for antibacterial properties of the immobilized bactericides against Escherichin coli, Staphylococcus aureu, and Micrococcus luteus demonstrated high activity of the quaternary salts bonded by the hydrophobic spacer. Advantageously, these insoluble bactericides can be applicated without contamination of the substrate; they can be removed easily and used repeatedly. 0 1994 John Wiley & Sons, Inc.

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Section: Resultsmentioning

confidence: 99%

Synthesis and antibacterial activity of immobilized quaternary ammonium salts

Augusta

Gruber

Streichsbier

1994

J of Applied Polymer Sci

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“…[I]- [4] The EB melting technology, introduced for metal production more than 25 years ago, [70]- [72] offers the advantage ofa high degree of flexibility in the heat source and is ideal for the melting and refining of metals and alloys under high vacuum in water-cooled copper hearths. Because EB melting is a surface heating method, it produces only a shallow pool, and this has a positive effect on both the cleaning process and the ingot structure.£73]- [77] The method can, however, be employed as a type of zone melting process in a manner similar to that ofVAR and ESR processes.…”

Section: Comparison With Other Remelting Technologiesmentioning

confidence: 99%

“…1, [1] [4] and the dimensions oftypical ingots processed by them are given in Fig. These processes, together with VAR, are illustrated in Fig.…”

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confidence: 99%

Vacuum Arc Metal Processing

Brückmann¹,

Scholz²

1996

Handbook of Vacuum Arc Science and Technology

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“…The Pt-Pd area was determined by the adsorption of CO at room temperature, after cleaning of the surface in air at 660 °F (350 °C). Carbon monoxide was flowed over the sample in a carrier gas and the adsorbed CO evaluated by a gas chromatograph (3). The unit used here, 1 µ of CO adsorbed per gram of catalyst, is equivalent to a combined surface area of Pt plus Pd of 0.05 m2/g.…”

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confidence: 99%