Ultraviolet‐sensitive photographic process using enzymes

Abstract

SummaryA unique silver-free and ultraviolet (UV)-sensitive photographic process using enzymes has been developed. It utilizes a-chymotrypsin acylated to a light-sensitive stereoisomeric ester as the basic photographic material. When U V light is exposed to the film, the signal is registered by the appearance of melanin pigment through the chymotrypsin-mediated activation of pre-tyrosinase.

Inhibition or initiation of a radical polymerization reaction by an ultraviolet‐induced enzymatic process

“…This is confirmed by the fact that most of the work with inhibited a-CT has been done through acylation with cis-CI. [12][13][14]22 0 II 1 ) N a H…”

“…The yield was 47% (4.7 g) and the melting point was 127°C (as previously found to be 127"C17). Otherwise, mle = 333(2), l90( 14), 162 (17), 144(100), 120(41), and 91 (19).…”

“…The overall yield was 50% and the melting point was 143°C. Otherwise, rnle = 274(1 l), 208(100), 207(1), 179(36), 178(5), 153(5), 89.5 (14), and 77 (15).…”

“…The p-nitrophenyl-P-( I-naphthy1)-acrylate had an overall yield of 62%; the melting point was 138°C. Also, rnle = 320(1), 319(3), 181(100), 153(34), 139 (28), 92 (14), and 91(47). The pnitrophenyl-P-(2-naphthyl)-acrylate had an overall yield of 49%; the melting point was 159°C.…”

Switching biomimetic hydrogels

“…1981), and biosensors (Kazanskaya et al . 1983;Kuan & Lee 1980;Willner & Willner 1992). Such regulation has been used to improve the overall activity of a packed-bed column bioreactor, for improved enzyme puri cation, and also in the design of novel reusable sensors.…”