480 



RADIOISOTOPES IN BIOLOGY AND AGRICULTURE 



Silver (Ag*), summary, 297-298, 450 

 Small-animal colony, general manage- 

 ment, 127-129 

 general specifications, 126-127 

 Sodium, body space, 300 



exchange rate from blood, 8, 300 

 radioactivation analj^sis, 421-422 

 removal rates from blood, 36 

 summary, 299-301 

 Sodium (Na*), reversible exchange in 

 blood, 32-37, 300 

 summary, 299-301, 450 

 Sodium (Xa2^), in double labeling, 191 

 in vivo usage, 4, 300 

 radiation-effect levels, 67 

 Soil, A value, 13 



phosphorus availability, 13 

 Soil-nutrient availability, 12-13 

 Soil studies, Ba*, 211 

 Ca«, 219 

 Co*, 241 

 manganese, 267 

 radioisotope, 152-154 

 rooting-pattern, 50-51 

 strontium, 304 

 zinc-65, 320 

 zirconium-95, 323 

 Solution counting, 187-188 

 Solvents for paper chromatography 



367-368 

 Sources for radioactivation analysis, 



416-419 

 Specific activity, definition, 7 

 gram element, 441 

 isotope, 441 



radiation injury as function of, 69-70 

 of radioisotope preparations, 446-451 

 Specific ionization, 84, 441 

 Specifications for radioisotope labora- 

 tories, 118-121 

 Spurious counts, 441 



shown by high background, 185 

 Stable, 441 



Staining of autoradiograms, 330-331 

 Standard deviation in counting, 172- 



173 

 Standards in tracer studies, 176-177 

 Starting voltage, 441 

 Statistical error (counting!, 441 

 Statistics of counting errors, 172-173 

 Steel, half-value layers for gamma 



radiation, 94 

 Storage of radioisotopes, 123-125 

 Stray radiation, 441 

 Stripping-film method, 338-340 

 Strontium, calcium ratio, 302 



radioactivation analysis, 423-424 

 summary, 302-305 



Strontium (Sr*j, mechanism of removal 

 from bone, 348 

 summary, 302-305, 450 

 Strontium (Sr^^), as insect label, 3, 304 

 in vivo usage of, 5, 303 

 radiation-effect levels, 67 

 Strontium (Sr^"), parent-daughter rela- 

 tionships, 65-66, 303 

 Subbing of slides, 339 

 Subcutaneous injection, 144 

 Sugars, labeled in photosynthesis, 42-43 



separation by ion exchange, 398-399 

 Sulfanilic acid reagent (diazotized), 372 

 Sulfur, exchange data, 73 



summary, 306-310 

 Sulfur (S35), amino acids double labeled 

 with, 47 

 in cellular biosynthesis, 348-349 

 digestion, with Mg(X03)2, 307-308 



with peroxide, 307 

 direct counting, 306-307 

 fibrinogen turnover rate, 37 

 intestinal deposition, 344 

 labeled compounds, 309 

 plant amino acid studies, 381 

 in rat embryo, 351 

 self-absorption data, 179 

 summary, 306-310, 450 

 Surfaces, decontamination, 101 

 Survey instrument, 441 

 Survival curve, 441 



Swine, administration of isotopes, 139- 

 144, 146-147 

 blood collection, 148 

 metabolism procedures, 137-139 

 Syndrome, 441 



Syringe for isotope delivery, 140-141 

 Syringe shields, 141 



Tagged atom, 441 



Tagged atoms, 441 



Tantalum (Ta*), summary, 311, 450 



Target, 441 



Target theory, 441 



Tartar emetic labeling, 206 



Technetium (Tc*), summary, 312, 450 



Teeth, analysis for Ca, 220 



Thallium, summary, 313-314 



Thallium (Tl*), summary, 313-314, 451 



Thiamine, ion-exchange methods, 395 



Thimble ionization chamber, 442 



Thin-window counter tube, 442 



Threshold dose, 442 



Thyroid function, effects of I^^\ 68 



in embryo, 257 

 Thyroid gland weights, 255 

 Thyroid uptake, iodine mass effect, 60- 

 61 



