Surrounding 1161[cm.sup.-1] are located peaks related to the sum of lactose (tertiary alcohol vC-OH) and monosaccharide (endocyclic
oxygen vC-O) signals (Figure 1) .
The 3-benzyl-1,3-thiazolidine2-thione ligand offers three types of donor atoms which are thiocarbonyl sulfur atom, the nitrogen atom, and the endocyclic
The bond lengths show the endocyclic
N2-C7 bond is shorter than the exo cyclic N1-C7 bond, the N1-C1 bond length is quite long 1.416(3)A.
The HOCl-induced oxidation of nucleic acids in a DNA strand normally affects the nitrogenous base either at the primary nitrogen ("exocyclic") in adenosine, guanosine, or cytosine or at the secondary nitrogen ("endocyclic
") in guanosine, uridine, or thymidine, the reaction at the endocyclic
nitrogen seemingly being preferred .
Loew (1994).Reaction mechanisms of formaldehyde with endocyclic
Imino groups of nucleic acid bases.
Reaction with endocyclic
imino groups of DNA bases.
Key statement: A rubber material is described, modified with a barrier material in the form of a copolymer which can be produced via ring-opening metathesis polymerization of a) at least one olefin monomer selected from the group consisting of monocyclic olefin monomers having one or two endocyclic
C--C double bonds and bicyclic olefin monomers having one endocyclic
C--C double bond and b) at least one polycyclic olefin monomer having at least two C--C double bonds.
The visceral mass consists of a helically twisted endocyclic
type digestive tube and a centrally located axial organ.
cis- and trans-decalin are the hydrogenation products which further gived ROCP and cracking (CR) products by hydrogenolysis of endocyclic
C-C bond of decalin (ROCP and CR products are not shown in Scheme 1).
These carbohydrate mimics substitute the endocyclic
oxygen of sugars with a basic nitrogen atom.
Hydrogenation in the presence of palladium on carbon catalyst removes the endocyclic
olefin, and the stereochemistry at the alcohol was inverted by converting it into the mesylate, which was then displaced with cesium acetate.
These studies revealed a pattern of endocyclic
selection, that is, opposing directional selection episodes on gene arrangement frequencies during the life cycle.