Alteration physical

Plasticizers. Addition of plasticizers (qv) to polyether elastomers alters physical properties, improves processing, and can improve low temperature flexibiUty. Plasticizers also reduce vulcanizate costs by allowing the use of higher levels of less expensive fillers. 

You may for example have suggested that the supply of other nutrients, such as ammonia and O2, may be adjusted to respond to the different needs of growth and penicillin production. You may also have suggested that precursors of specific penicillins, such as P-phenylacetic add, may be added after the growth phase is complete. You may have also considered altering physical parameters such as pH and temperature. 

It is worth noting that TTF-based sensors for species other than metals, particularly organic species, have been well studied. The principle is, of course, the same a host group capable of recognising a guest molecule is tethered to the signaller TTF, which displays an altered physical response when a guest is bound and when the receptor is free. Systems of this type are of particular interest as biosensors, for example, in the detection of saccharides for disease... 

Lipid nanodispersions (SLN and NLC) are complex, thermodynamically unstable systems. The colloidal size of the particles alters physical features (e.g., increasing solubihty and the tendency to form supercooled melts). The complex structured lipid matrix may include hquid phases and various lipid modifications that differ in the capacity to incorporate drugs. Lipid molecules of variant modifications may differ in their mobility. Moreover, the high amount of emulsifier used may result in liposome or micelle formation in addition to the nanoparticles. 

Polysaccharides that have been modified chemically, or altered physically, have been used as adsorbents for affinity chromatography. The modification of the structure of polysaccharides has been achieved by introducing cross-linkages between the chains of the polymer and bifunctional reagents. The alteration of the properties of polysaccharides by physical means can be effected by embedding the polysaccharide in a network of the support material. The molecular in-... 

Hydrogenated oils can be suitable basestocks for margarine, shortening, and frying oil with improved stability and altered physical properties. But hydrogenation has not completely solved oxidative-stability problems, and there is increasing concern about the nutritional safety of partially hydrogenated oils. 

A hair cut or a hair color change alters physical appearance. 

Chemical modification is now a senior technique in protein science and has retained its importance despite the introduction of many powerful modern physical methods over the last 30 years. Some of the more useful areas of chemical modification have been reactive or active-site modifications, modifications to alter physical and biological properties, radioisotopic labeling, and modifications for analytical purposes. 

If the chemical contents of a polymorph are different than other forms, it is designated as a pseudopolymorph.Most often this occurs due to the presence of differing amounts of solvent, and may alter physical properties of the crystals such as melting points and solubilities. Polymorphism and pseudopolymorphism may be observed when different experimental conditions are used for synthesis. For example, if crystals are grown by sublimation, changing the temperature will often yield different crystal structures, possibly even metastable phases that are kinetically favored. 

The net effect of the entire deterioration process is to alter physical and chemical properties so that the weathering stone becomes even more susceptible to atmospheric attack. 

Nonstandard amino acids can be either incorporated globally at multiple sites within a protein or inserted at specific locations (1, 15). Global misincorporation of nonstandard amino acids can produce protein polymers with altered physical properties that confer, for example, varied tensile strengths and elasticities (16). These unique biomaterials can be used in many medical applications, such as altering properties associated with cell adhesion. In other applications, routine replacement of methionine by selenomethionine aids in X-ray crystal structure determination. 

Shoreline sensitivity — The susceptibility of a shoreline environment to any disturbance that might decrease its stability or result in short- or long-term adverse effects. Shorelines that are susceptible to damage from stranded oil are usually equally sensitive to cleanup activities, which may alter physical habitat or disturb associated flora and fauna. Marshes and lagoons are the most sensitive shoreline environments, while exposed coasdine subject to heavy wave action is generally the least affected by oil and cleanup activities. 

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