By Jean-Pierre Lepoittevin, David A. Basketter, An Goossens, Ann-Therese Karlberg, R.J.G. Rycroft
Allergic touch Dermatitis offers all up to date chemical and physio-chemical suggestions for the research and realizing of allergic touch dermatitis (ACD). The ebook covers all points of ACD - pores and skin penetration and metabolism, identity of sensitizers and hapten-protein interplay, together with new innovations of accelerating value resembling molecular popularity and quantitative structure-activity relationships. moreover, finished references are supplied, making this the main entire on hand text-book for dermatologists.
Allergic touch Dermatitis reaches an equilibrium among basic recommendations and medical purposes and hence offers a vital instruction to dermatologists, allergologists, biochemists and toxicologists.
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Extra info for Allergic Contact Dermatitis: The Molecular Basis
In NMR analysis the sample is put in a magnetic field and the field will affect atoms/nuclei in the sample. Various nuclei can be detected in NMR, but the most common analyses are proton NMR (lH-NMR) and carbon-13 NMR (13 C-NMR). The analysis principle will be described for the simplest and most studied nucleus, the proton. Protons in a magnetic field orient their magnetic moment by aligning either with the field or opposed to the field; i. , they may have two different spins. These represent two energy levels of the nucleus, with the nucleus opposed to the field corresponding to the higher energy level.
E -:- N02 HNGJF I~ N02 2,4-Dinitrofluorobenzene (DNFB) Fig. 36. The ipso substitution - HF • 40 Jean-Pierre Lepoittevin· Valerie Berl Nu-H • Citronellal Fig. 37. Mechanism of nucleophilic addition As before, the nucleophile adds on to the electrophilic carbon, resulting in displacement of the rr bond towards the most electronegative atom. This is followed by deprotonation of the bound nucleophile and protonation of the alkoxide ion formed, resulting in a saturated compound (Fig. 37). This type of direct attack on the electrophilic carbon is referred to as 1,2-addition.
4. Covalent bonds with strong/characteristic IR absorption: a and b C-H in saturated and unsaturated hydrocarbons, c O-H in alcohols and phenols, d c=o in ketones, e C=O in aldehydes, f C=O in carboxylic acids, g C=O in esters Finger print region 140o-aOO em"1 ~ 80 70 ~ 60 Gl 0 c:: :ll! ---,,---,---------,---------,---------T4 4400 4000 3500 3000 2500 2000 1500 1000 45( Wave number (em"l) Fig. 5. Infrared (IR) spectrum of 7-oxodehydroabietic acid methyl ester. Peak A -1735 em"! corresponds to c=o in the ester function, peak B -1695 cm-!
Allergic Contact Dermatitis: The Molecular Basis by Jean-Pierre Lepoittevin, David A. Basketter, An Goossens, Ann-Therese Karlberg, R.J.G. Rycroft