Chains alkyl chain length

Amine Primary or secondary Monoamide or diamide Alkyl chain chain length Degree of saturation Substituents, e.g. ... 

Alterations in Alkyl Chains Chain Length, Branching, and Rings... 

The reported transition temperatures for a range of [RMIM] ionic liquids [6, 23-26, 46] are shown in Figure 3.1-5, with varying anion and alkyl chain substituent length. 

Rodriguez-Saona CR, Maynard DF, Phillips S, Trumble JT, AlkyRurans Effects of alkyl side-chain length on insecticidal activity, J Nat Prod 62 191—193,... 

Frequency-domain measurements of fluorescence energy transfer are used to determine the end-to-end distance distribution of donor-acceptor D-A) pairs linked by flexible alkyl chains. The length of the linker is varied from 11 to 2B atoms, and two different D-A pairs are used. In each case the D-A distributions are recovered from global analysis of measurements with different values for the FSrster distance, which are obtained by collislonal quenching of the donors. In all cases essentially the same distance distribution Is recovered from the frequency-domain data for each value of tha Ffirster distance. The experimentally recovered distance distributions are compared with those calculated from the RIS model. The experimentally recovered distance distributions for the largest chain molecules are In agreement with the predictions of the RIS model. However, the experimental and RIS distributions are distinct for the shorter D-A pairs. 

The comparison of CMC data in distilled vs. hard river water shows that the decrease in CMC with hardness has the order anionics cationics nonionics (Rosen et al., 1996). Hardness increases the dependence of the CMC on alkyl carbon chain length of CnE0mS04, indicating that in hard water the influence of additional carbon atoms is the same for CnE0mS04 as for CnEOm surfactants (Rosen et al., 1996). The influence of ionic strength on micellization of nonionic surfactants is due to a salting out effect of the hydro-phobic moiety of the surfactant molecule (Carala et al., 1994). 

Satouchi, K., Pinckard, R. N., and Hanahan, D. J. (1981) Influence of alkyl ether chain length of acetylglyceryl ether phosphorycholine and its ethanolamine analog on biological activity towards rabbit platelet, Arch. Biochem. Biophys. 211, 683-688. 

For reverse-phase chromatography purposes, silica sorbents are commonly modified by hydrophobic ligands by means of silanes. These systems are therefore particularly suitable for water intrusion experiments [7]. We studied the influence of the chain nature (perfluorated, alkyl), the chain length and the type of bonding chemistry (mono or trifunctional, chloro- or alkoxy- silanes) on the hydrophobic properties of silica gels. 

In this chapter, the properties of a series of poly(dimethylsiloxane-co-methylalkylsiloxane) (PDM-PMAS) of various alkyl side-chain lengths are discussed. These polymers contain 3.5 mol % methylalkylsiloxane units and are prepared from the same precursor thus, any effects due to variations in the percentage of alkyl substitution and main-chain molecular weight differences and effects due to block distribution of the alkyl substituents are eliminated. 

Warner, K.S. Li, S.K. Ftiguchi, W.I. Influences of alkyl group chain length and polar head group on chemical skin permeation enhancement. J. Pharm. Sci. 2001, 90, 1143-1153. 

Table 6.11 Micellar solubilisation parameters for steroids in r>alkyl polyoxyethylene surfactants C E (where n = alkyl (C) chain length and m = polyoxyethylene (E) chain length) at 25°C°...

Three-component formation was observed for pyrene- and naphtha-lene-/9-CD complexes in the presence of surfactants such as n-alkyl sulfates (chain length C4-C12), n-alkylammonium chlorides (Cj-Cg), and n-al-kyltrimethylammonium bromides (CiQ-Cig) [118]. The two complexes exhibit different behavior in the presence of surfactants. With respect to the value of the two-component system, increased association constants were found for pyrene (short-chain surfactants gave higher constants than long-chain). Lower association constants were found for / -CD-naph-thalene in the presence of surfactants. By following the time course of T-T absorption of the two aromatics in the presence of nitrite, it was found that their different behaviors were due to surfactant influence on the rate constants of formation (k+) and dissociation (k ) of the inclusion compound. For naphthalene, a reduction of k+ was observed in the presence of surfactants while k was unaffected. For pyrene, short-alkyl-... 

Figure 2.9. Unit cell parameter a as function of alkyl side chain length. Data are selected from various publications as indicated.

Platelet retention in the polymer-coated bead columns was quantified by noting the percentage of platelets removed from aliquots 2 through 5 of 5 successive 1 ml effluent fractions. (Aliquot 1 was diluted with saline and was not counted.) Retention values obtained for the 14 polymers tested are shown in Table 1. These data are plotted in Fig, 2 as a function of both the alkyl side chain length and the glass transition temperatures (Tg s) of the polymers. 

Figure 3. Passivation of polymers of the acrylate series (A) and the methacrylate series (B) by preliminary exposure to platelet-poor plasma (PPP) before whole blood platelet retention vs alkyl side chain length. (Replotted from data in Fig. 5 of Ref. 17.)...

Vanderzande, D., Manca, J.V., 2009. Effect of alkyl side-chain length on photovoltaic properties of poly(3-alkylthiophene)/PCBM bulk heterojunctions. Adv. Funct. Mater. 19,3300-3306. 

S. Feng, G.A. Voth, Molecular dynamics simulations of imidaz-oHum-based ionic liqmdAvater mixtures Alkyl side chain length and anion effects. Fluid Phase Equilib. 294 (2010) 148-156. 

X-ray studies, coupled with thermal studies by Nandi, examine the relationship between alkyl side-chain length and degree of regioregularity in the cocrystalUzation of rr-P3HT and rr-P30T blends... 

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