Ultrasonic waves 1711 

 Ultrastructural studies 1374 

 Ultrastructure 784, 1375, 2224 

 Ultraviolet fluorescence spectra 683 



light 246, 452, 569, 570, 789, 864, 1047, 1834, 2086 



purification system 573 



radiation 157, 550 



-treated seawater 834 



Ulva 313, 1128, 2001 



Umbones 2, 10 8, 311 

 Undeveloped 203 

 Unio 2219 



Unit, holding 296 

 United 152 



Kingdom 133, 201 



States/United States coast 266, 512, 547, 670, 694, 1050, 1225, 1248, 1289, 



1303, 1316, 1549, 1551, 1552, 1687, 1815, 1869, 2035, 2043 



clam industry 1218 



, southeastern 413, 423 



species acted differently from European 1653 



^^^ Virgin Islands 2021 



University of Delaware 550, 672, 1499, 1731 



Southampton, England 639 



Southwestern Louisiana 85 8 



Unpolluted 203, 583 



waters 383, 644, 673, 1887 



Unreliable 302 



Unstable 531 



Unsuccessful 250, 1591 



Uptake 25, 173, 178, 188, 224, 231, 233, 249, 346, 476, 602, 1027, 1090, 2090 



, 3 H-T 2202, 2203 



or loss, ease of 744 



viral 2109 



Upwelling, artificial 122, 1418, 1562, 1563, 1564, 1753 

 Urbanization 1474 



Urea 29, 685, 686, 769, 2011 

 concentrations 401 



, stabili 



ty to 



396 



Urease 769 







Uric acid 



2011 





Urine 1808 







, human 



210, 



531 



VvosaVginx 

 1734' 



41, 



167, 



203, 273, 279, 281, 791, 1044, 1149, 1191, 1192, 1459, 1487, 



833 



