Two Topics in Chemical Instabilities: I Periodic Precipitation Processes; II Resonances in Oscillatory Reactions and Glycolysis

1981 ◽  
pp. 180-185
Author(s):  
John Ross
Keyword(s):  
Periodic Precipitation ◽  
Oscillatory Reactions ◽  
Precipitation Processes ◽  
Chemical Instabilities

Measurements of temporal and spatial sequences of events in periodic precipitation processes

1982 ◽  
Vol 76 (3) ◽  
pp. 1392-1406 ◽  
Author(s):  
Shoichi Kai ◽  
Stefan C. Müller ◽  
John Ross
Keyword(s):  
Periodic Precipitation ◽  
Precipitation Processes ◽  
Temporal And Spatial

Measurements and a hypothesis on periodic precipitation processes

1987 ◽  
Vol 91 (24) ◽  
pp. 6300-6308 ◽  
Author(s):  
Mel Edward. LeVan ◽  
John. Ross
Keyword(s):  
Periodic Precipitation ◽  
Precipitation Processes

Precipitation in silicon: Microanalysis

1988 ◽  
Vol 46 ◽  
pp. 474-475
Author(s):  
R.W. Carpenter
Keyword(s):  
Transition Metals ◽  
Spatial Resolution ◽  
Thin Foil ◽  
Precipitation Reaction ◽  
High Current ◽  
Reaction Products ◽  
Carbon And Nitrogen ◽  
Dielectric Layers ◽  
Precipitation Processes ◽  
Areas Of Interest

Interest in precipitation processes in silicon appears to be centered on transition metals (for intrinsic and extrinsic gettering), and oxygen and carbon in thermally aged materials, and on oxygen, carbon, and nitrogen in ion implanted materials to form buried dielectric layers. A steadily increasing number of applications of microanalysis to these problems are appearing. but still far less than the number of imaging/diffraction investigations. Microanalysis applications appear to be paced by instrumentation development. The precipitation reaction products are small and the presence of carbon is often an important consideration. Small high current probes are important and cryogenic specimen holders are required for consistent suppression of contamination buildup on specimen areas of interest. Focussed probes useful for microanalysis should be in the range of 0.1 to 1nA, and estimates of spatial resolution to be expected for thin foil specimens can be made from the curves shown in Fig. 1.

On the precipitation processes in commercial QE22 magnesium alloy

2007 ◽  
Vol 98 (6) ◽  
pp. 501-505 ◽  
Author(s):  
Osvaldo Agustin Lambri ◽  
Gabriel Julio Cuello ◽  
Werner Riehemann ◽  
Jose´ Lucioni
Keyword(s):  
Magnesium Alloy ◽  
Precipitation Processes

Lipospheres: Emerging Carriers in the Delivery of Proteins and Peptides

1970 ◽  
Vol 1 (3) ◽  
pp. 207-214
Author(s):  
Manju Rawat ◽  
Swarnlata Saraf
Keyword(s):  
Drug Delivery ◽  
Protein Stability ◽  
Biodegradable Polymers ◽  
Clinical Utility ◽  
Physicochemical Characteristics ◽  
Peptide Delivery ◽  
Chemical Instabilities ◽  
Physical And Chemical ◽  
Proteins And Peptides

Currently, drug delivery technologies for protein and peptide delivery mainly rely on biodegradable polymers. However, protein stability during release from these systems can be critical due to physical and chemical instabilities. Lipospheres are solid microparticles composed of fat core stabilized by phospholipids layer represent an alternative carrier for the delivery of highly challenging, labile and unstable  substances. This review highlights various aspects of lipospheres like physicochemical characteristics and stability for better clinical utility with a wider spectrum of proteins and peptides.

Gravity Effect on the Formation of Periodic Precipitation Patterns

2000 ◽  
Vol 65 (9) ◽  
pp. 1438-1442 ◽  
Author(s):  
Vladislav Holba ◽  
Frederik Fusek
Keyword(s):  
Gravitational Field ◽  
Spatial Arrangement ◽  
Experimental Results ◽  
Single Sample ◽  
Gravity Effect ◽  
Periodic Precipitation ◽  
Precipitation Patterns ◽  
Liesegang Bands

The effect of gravity on the formation of Liesegang patterns of Ag2Cr2O7in gelatin and that of PbI2in agar was investigated. Spatial arrangement of Liesegang bands was measured in the parallel and antiparallel orientation to the gravitational field in a single sample with all other parameters kept fixed. The experimental results are discussed in terms of the prenucleation theory of periodic precipitation.

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