Disclosed herein are methods for securing a raised pavement marker to a roadway.

Disclosed herein are methods for securing a raised pavement marker to a roadway.

In some aspects, the present disclosure pertains to systems for forming hydrogels that comprise (a) a radiopaque polyamino compound and (b) a reactive polymer comprising a plurality of hydrophilic polymer segments and a plurality of reactive moieties, wherein the reactive moieties are reactive with amino groups of the radiopaque polyamino compound, and wherein the radiopaque polyamino compound is produced by a method that comprises: (i) converting hydroxyl groups of a polyhydroxylated radiopaque compound to amino groups, (ii) converting vicinal diol groups (CHOHCH.sub.2OH groups) of a polyhydroxylated radiopaque compound into hydroxyaminoethyl groups (CHOHCH.sub.2NH.sub.2 groups), or (iii) converting vicinal diol groups of a polyhydroxylated radiopaque compound into aminomethyl groups (CH.sub.2NH.sub.2 groups). In other aspects, the present disclosure pertains to hydrogels formed from such systems and to methods of treatment using such systems.

The present invention relates to a polyamide resin film having improved light resistance by minimizing color difference variation rate due to long-term ultraviolet irradiation, and a resin laminate using the same.

A method for producing amide-containing molecules of the formula:

##STR00001##

wherein: X.sup.1 and X.sup.2 are independently selected from NH.sub.2 and COOH; L is independently, in each instance, selected from hydrocarbon linkers containing 1-12 carbon atoms optionally containing one or more heteroatoms selected from O, N, S, and halogen atoms, and are the same or different; A independently represents an NHC(O) or C(O)NH linkage; w, x, y, and z are independently 0 or 1; the method comprising reacting at least two reactant molecules that form an amide bond with each other via X.sup.1 and X.sup.2 groups, in the presence of an amide synthetase enzyme, wherein the at least two reactant molecules are independently selected from the following formulas:

##STR00002##

wherein v is 0, 1, or 2.

A method for producing amide-containing molecules of the formula:

##STR00001##

wherein: X.sup.1 and X.sup.2 are independently selected from NH.sub.2 and COOH; L is independently, in each instance, selected from hydrocarbon linkers containing 1-12 carbon atoms optionally containing one or more heteroatoms selected from O, N, S, and halogen atoms, and are the same or different; A independently represents an NHC(O) or C(O)NH linkage; w, x, y, and z are independently 0 or 1; the method comprising reacting at least two reactant molecules that form an amide bond with each other via X.sup.1 and X.sup.2 groups, in the presence of an amide synthetase enzyme, wherein the at least two reactant molecules are independently selected from the following formulas:

##STR00002##

wherein v is 0, 1, or 2.