Symptoms of aliphatic hydrocarbon ingestion, in the absence of toxic substituents, are confined to the gastrointestinal tract and the respiratory tract. ❋ Unknown (2010)
A particular example is the definition of frequent, simple single-ended amino acid binding sites, whose focus on affinity for side chain atoms frees α-carbon substituents for the posited peptide forming reactions (Fig. 7). ❋ Unknown (2010)
In 1873, after van't Hoff had moved to Paris to work with Charles Adolphe Wurtz, he realized that the phenomenon of optical activity possessed by some organic molecules — their ability to rotate plane-polarized light — could be explained by the two possible arrangements of four different substituents in the space around a carbon atom. ❋ Unknown (2008)
The method is not subject to changes in ring substituents as is the D/L naming of sugars. ❋ Unknown (2005)
As these polymers have large substituents, the doping effect is poor. ❋ Unknown (2001)
However, these polymers can be modified by introducing various substituents with interesting optical and thermal properties. ❋ Unknown (2001)
Thus those of the emodin type (with substituents in both terminal rings A and C) are usually derived through the acetatemalonate (polyketide) pathway in both higher and lower plants, while the alizarin (without substituents in ring A) type of anthraquinones are derived through the shikimic acid pathway. ❋ Unknown (1991)
Although a substantial number of BODIPY dye analogues have been developed, primarily through extended conjugation using aryl substituents, the substituted BODIPY dyes show red shifts of over 100 nm but have only low to moderate fluorescence quantum yields owing to non-radiative decay arising from the non-rigid nature of compounds. ❋ Unknown (2010)
In addition, the catalytic process is efficient for the synthesis of symmetric and a range of asymmetric aromatic azo compounds from the mixtures of two anilines substituted with electron-donor and electron-acceptor substituents. ❋ Abdessamad Grirrane (2010)
Calculates the 3J coupling constant from the dihedral angle and the electronegativity of the substituents using either the Altona equation or a generalized Karplus equation. now compatible with Snow Leopard. ❋ Unknown (2010)
Alkenyl, and more-recently alkynyl substituents afforded large red shifts, but the rigidity of the triple bond generally results in higher quantum yields. ❋ Unknown (2010)
Although high-level theory predicts these helium bonds to be quite short with relatively high stretching frequencies, the kinetic barriers to the loss of helium are predicted to be small, and are not increased by the strategy of having bulky substituents on the ring ligand. ❋ Henry S. Rzepa (2010)
[19] Recently, Poirier et al. published a series of hybrid inhibitors, based on a E1/E2 core with substituents of various lengths in C16 position ❋ Matthias Negri Et Al. (2010)
It is known that liquid porphyrins maintain the same spectroscopic features as their solid analogues, therefore, this discovery not only opens the way to design porphyrins possessing such substituents in optical limiting devices but also allows its broader use in other applications where liquidity or very high solubility are desirable. ❋ Unknown (2010)
