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Structure group

We put it into a form showing the Lie group structure of the problem ... [Pg.836]

The adjacent charge rule provides some information regarding the nature of the bonds in the oxygen acids of heavier atoms. It has become customary, following Lewis, to assign to the silicate ion and related groups structures... [Pg.641]

As a polycation, chitosan spontaneously forms macromolecular complexes upon reaction with anionic polyelectrolytes. These complexes are generally water-insoluble and form hydrogels [90,91]. A variety of polyelectrolytes can be obtained by changing the chemical structure of component polymers, such as molecular weight, flexibility, fimctional group structure, charge density, hydrophilicity and hydrophobicity, stereoregularity, and compatibility, as... [Pg.158]

Table 1 is a summary of current knowledge of the relationship between side group structure in polyphosphazenes and biomedically important properties. Within rather broad limits two or more of these properties can be incorporated into the same polymer by a combination of different side groups attached to the same macromolecular chain. [Pg.188]

TABLE 1 Summary of Side Group Structure-Property Relationships in Polyphosphazenes... [Pg.189]

An important developing area that lies in the region between polymer chemistry, ceramic science, and metals, involves the search for new electrically-conducting solids. Linear polymers may conduct electricity by electronic or ionic mechanisms. As will be discussed, polyphosphazenes have been synthesized that, depending on the side group structure, conduct by either of these two processes. [Pg.252]

Four examples of the effects of changes in side group structure are illustrated in the polymers depicted as II and VI-VIII. This method of synthesis can be used as a prelude to the generation of a wider structural variety if organic reaction chemistry is carried out on the organic side groups. For example, the glucosylphosphazene polymer shown as X has been prepared by the chemistry shown in Scheme II. [Pg.254]

The variations in the end group structure and conformation are determined by the carotenoid biosynthesis enzymes. These structural features are likely to determine localization as well as functions of these xanthophylls in vivo (Hashimoto et al., 2001 Young et al., 2002). [Pg.114]

Another group which is well known for restricted rotation is the nitrovinyl group (Structure 6.17). [Pg.80]

Several modem analytical instruments are powerful tools for the characterisation of end groups. Molecular spectroscopic techniques are commonly employed for this purpose. Nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared (FTIR) spectroscopy and mass spectrometry (MS), often in combination, can be used to elucidate the end group structures for many polymer systems more traditional chemical methods, such as titration, are still in wide use, but employed more for specific applications, for example, determining acid end group levels. Nowadays, NMR spectroscopy is usually the first technique employed, providing the polymer system is soluble in organic solvents, as quantification of the levels of... [Pg.172]

The combination of a number of these techniques often provides complementary information on end group structure and hence the mechanism of polymerisation. The synergy between MALDI-TOF MS and NMR spectroscopy is particularly powerful, with MS/MS providing additional information where necessary. MALDI-TOF MS provides information on individual oligomers,... [Pg.173]

This section focuses on describing on how end group structures can be determined from one particular polymer that was generated by free radical polymerisation (see Figure 1), namely poly(methyl methacrylate) (PMMA, 1). [Pg.175]

Several techniques for determination of end group structure in polyesters have been described in the literature [25-31]. Many analytical procedures have... [Pg.183]

Figure 11 Reaction schemes for formation of PET oligomers with different end group structures. Figure 11 Reaction schemes for formation of PET oligomers with different end group structures.
Di-hydroxyl end-capped PPG (18) is an intermediate in the formation of a common polyurethane prepolymer (20). End group functionality of this intermediate is important, as this hydroxyl functionality is modified to form the prepolymer. Any different end group structures could lead to the presence of prepolymer that will not form polyurethane of the desired structure. The desired reaction of the intermediate (18) to form the prepolymer (20) is described in Figure 21. Reaction of one unit of the intermediate (18) and two units of methylene diphenyl 4,4 -diisocyanate (MDI) results in the formation (nominally) of the prepolymer (20). [Pg.195]


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See also in sourсe #XX -- [ Pg.4 , Pg.214 ]

See also in sourсe #XX -- [ Pg.392 ]




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Acetyl group structure

Actinide space group structure type

Acyl group structure

Ajmaline group structure

Alkali metals (Group crystal structures

Alkali metals (Group structures

Alkoxides group, structure

Amide functional group atomic orbital structure

Amide functional group structural formula

Amino group, structure

Application of space group symmetry in crystal structure determination

Azide group structure

Backbone structure group-8 metals

Band Structure of Group III Nitrides

Benzene group, surfactant structure

Benzyl group, structure

Blood group antigens, structure

Blood-group polysaccharides structure

Building crystal structures from lattices and space groups

Calculation from structural group contributions

Calculation from structural group contributions compound

Carbohydrate chains structural reporter groups

Carbonyl group electronic structure

Carbonyl group resonance structures

Carbonyl group structure

Carbonyl group structure and bonding

Carbonyl group, reduction resonance structures

Carboxyl group model structure

Carboxyl group structure

Carboxyl group, amino acid structure

Carboxyl groups chemical structure

Chain structure terminal groups

Common Crystal Structures of the Group III Nitrides

Congeneric groups structural classes

Corticosteroids structural groups

Crystal structure Group

Crystal structure prediction space groups

Crystal structure space groups and

Crystal structures, polymers space group

Crystal structures, polymers symmetry group

Crystallographic structure refinement group

Cube structure symmetry groups

Cubic structure space group

Determination of Space Group and Crystal Structure

Dicarbonyls, Group structural properties

Donor groups lead structures

Effect of Functional Group Structure on Selectivity

Effect of the R Group Structure on SN2 Reactions

Electronic structure, amide group

End groups, structures

Estimation from structural group contributions

Estimation from structural group contributions systems

Flavocytochrome prosthetic groups structure

Fourier band assignments for groups/structures

Fourth-Group Structures

Functional Groups that Terminate the Core Structure

Functional groups bond-line structures

Functional groups structural formulas

Functional groups structure

Functional groups, effect supramolecular structures

General Remarks on the Band Structures of Group III Nitrides

General Structural and Synthetic Interest in the Phenoxyl Group

Group 1 elements structural effects

Group 12 structural studies

Group 15 amides structural data

Group 17 elements electronic structures

Group 5 metal halide clusters electronic structure

Group 5 metal halide clusters molecular structure

Group 8 (VIII structural studies

Group Frequencies Associated with NH and CN Structural Units

Group Frequencies of M—H Structural Units

Group crystalline structures

Group lattice structures

Group molecular structure

Group solid state structures

Group structural parameters

Group structures of elements

Group theory and electronic structure

Groupings, structural

Groups class structure

Hemiacetal groups structure

Hemiketal groups, monosaccharide structure

Herbicide groups, structure-activity

Herbicide groups, structure-activity relationships

Hydroxide cationic functional group, structure

Hydroxyl group structure

Hydroxyl groups monosaccharide structure

Icosahedron structure symmetry groups

Infrared spectroscopy structural hydroxyl groups

Internal Structure of Illite Group

Internal Structure of Kaolinite Group

Internal Structure of Palygorskite-Sepiolite Group

Internal Structure of Smectite Group

Internal Structure of Vermiculite Group

Ionizable groups, amino acid structure

Isoelectronic series, main group hydride structure and bonding

Linear polymers with p-phenylene groups and other ring structures

Metal Fluoride Surfaces that Contain Surface Hydroxyl Groups Aluminium Hydroxy Fluorides with the Hexagonal Tungsten Bronze Structure

Methyl group structure

Methyl group, model structure

Molecular Structures I Compounds of Main Group Elements

Molecular Structures of Covalently Bound Main Group Elements

Myoglobin prosthetic group, structure

NHC Complexes of Main Group Elements Novel Structures, Reactivity, and Catalytic Behavior

Nitramino group, structure

Nitro group structure

Nitro group structure and conjugation

Nitrogen, electron structure leaving group

Nitroso group, structure

Octahedral structure symmetry groups

Organic functional groups structure

Phenyl group structure

Phenyl group, interaction with aromatic structures

Phosphodiester group structure

Physical, Spectroscopic, and Structural Properties of the Various Group 4B Metallocene Dicarbonyls

Platinum group metals surface structure

Point Group. Electronic Structure

Point Group. Isomerism. Electronic Structure

Prediction from structural groups

Prosthetic group structural protein

Prosthetic group, structure

Prosthetic groups primary structure

Prosthetic groups secondary structure

Prosthetic groups tertiary structure

Proton chemical shifts structural-reporter groups

Quinone group containing structures

Resonance structures metal carbonyl group

Scandium Group Elements electron structures

Serpentine mineral groups structure

Solid state structures group 2 compounds

Solution-state NMR determination of polymer end-groups, substituents and minor structures

Stemona alkaloids structural groups

Streptococcus Group structure

Structural Relationships by Group-Subgroup Relations

Structural Transitions at Dense Arrays of Protogenic Surface Groups

Structural details of trioctahedral true micas-2M, space group

Structural details of trioctahedral true micas-3T, space group

Structural group analysis

Structural hydroxyl groups

Structural hydroxyl groups, infrared spectra

Structural point groups, crystallography

Structural studies, lead compounds donor groups

Structurally rigid groups

Structure Elucidation Group

Structure and Bonding The Carbonyl Group

Structure and SN2 Reactivity The Leaving Group

Structure and bonding in simple compounds of the Group 14 elements

Structure common binding groups

Structure of Terminal Groups

Structure of amylose. End group analysis

Structure of side groups

Structure of the Carbonyl Group

Structure of the Heme Prosthetic Group

Structure of the Leaving Group

Structure of the Prosthetic Group

Structure space groups

Structure, Group Theory and Spectroscopic

Structure, carboxyl group Diversity

Structure, carboxyl group Poly

Structure-Function Relationship for the R Group

Structure-activity relationship groups

Structure-activity relationship substituent groups

Structure-activity relationships specific substituent groups

Structure-function relationship leaving group

Structure-reactivity relationships functional group effects

Structure. The functional group

Structures and Bonding in Group III Derivatives

Structures of Functional Groups

Structures of Main Group Organometallic Compounds Containing Electron-Deficient

Structures of Main Group Organometallic Compounds Containing Electron-Deficient Bridge

Structures of Main Group Organometallic Compounds Containing Electron-Deficient Bridge Bonds

Structures of some 7r-organometallic compounds containing allyl groups as ligands

Structures organic group abbreviations

Structures with unconnected (PO4) groups

Sulfhydryl groups, amino acid structure

Surfactants hydrophobic group structure

Synthesis, Structure and Reactivity of Group

The Group Structure

The Main-Group Elements Applying Principles of Bonding and Structure

The incorporation of water solubilizing groups in a structure

Transition structure group

Typical structures of 16th group elements

Vacuum Structure Group Analysis

With ether pendant groups structures

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