CHAKRAVARTI AND HELD Table 4. Radioisotopes (disintegrations per minute per gram) in rations from Rongelap Island (dry-weight basis). is). ~oniple 60 “9 WB 28 459 A 2.82 B65 38.9 371 Oe 0485 760 0814 22 277 95 152 138 WW 22 17 12. 8 . 4 — 1 223. 18 7.38 t 3.8 22.7 974 O11 = 0.16 —~0.23 +0.09 —0.19 +010 —).21 +011 —-).003 + 0.13 3.6 16.1 20.0 3.0 2.6 0.21 D065 0.86 0.22 0.32 Vay WIZE = 6 IS + O45 + 0.30 + 0.35 + 0.41 + 0.36 42 860777 HAG AOE G = 2 + + + 0.09 0.6 0.08 0.05 0.08 RESULTS AND DISCUSSION Mratein mitrogen was determined by the Kjelein 0.399: 0.027 32 362 3 Follewing the same principle, Joyner and ‘hakravarti (1960) suggested techniques that were ipplied to these samples. 1.30 ).080 : rhe thou, Fat was determined by a modification of the Juhason method (Winton and Winton, 1945). Methylene chloride was the extracting solvent. eS OF ee 30073 Ash content was determined as the nitrate form by drying an aliquot of the ashed sample to constant weight, Moisture content was calculated from the wetseight co dry-weight ratio. Total carbohydrate and like substances were esti- 75 77 0.28 0.29 0.38 0.17 0.21 Table 1 lists the components of the 24-lr food rations collected at Rongelap Island. Tables 2 and 3 show proximate composition and trace-element content of the rations, and Tables + and 5 present levels of radioiso- a Hcl 0.214 ee = = = + + ‘aay added untif a precipitate furmed, and an excess of NIGH was then added during constant. stircng. The precipitate, magnesium ammonium phos- 1) and are selectively eluted at different molarities 335 45 Te eR made basic with LV NHLOH; 5% (NH,)2POv shown that the chloride complexes of the transitiotial elements nickel through zine are adsorbed onto a strongly basic anion-exchange resin (Dowex 222, i4 2 “U.Y¥5 ccunting evror. metrically by methods described by Sandell (1959). Fhe clements were initially separated by selective elution of their chloride complexes from an anionexchange. resin. Kraus and Moore (1953) have 1275 OND. #3 3. 9.67 170 0.87 2.50 0.05 22 13 14 .15 16 olution against a standard EDTA solution using ‘se indicator Eriochrome Black T. Portal phosphorus was determined by the colorisetric method of Fleischer et al. (1958). 9 L. YA3 0.90 0.36 1.20 0.33 Phe transition cements nickel, manganese, cosalt, copper, iron, and zinc were determined colori- 485.0 05 0.84 + 0.07 1.63 + 0.16 1.25 + 0.25 aiuin was determined by titrating an aliquot of this 2. 10 9 si 61.4 = 0.00 14.1 + 0.50 21.1 + 0.87 & + 2 + & T1ySt phate, was allowed to settle overnight, removed by tiltering, dissolved in 6 drops of concentrated t{.8e),, and made to volume with water. Magne- 2 28 a." 2 9 \ raat 0.04 = 0.09 0.11 + 0.20 0.49 +0.39 > Negative values are given to indicate that there are errors in addition to the counting error which cannot be specifically accounted for. 823 0.102 3 2 3 0 7 A Zov 0.40 + 0.29 —1.03 + 0.53" —2.40 + 1.0 Won te : 4 ye 0.35 + 12° 0.52 + .25 0.12 + 52 wted by subtracting moisture, fat, protein, and ny strom the total solids and calculating the carcydrate content by difference. [53 topes. Results are given on a percentage or unit weight basis (Tables 2 and +) and as amount for total diet (Tables 3 and $). The former basis permits comparison of the relative composition of individual rations and facilitates evaluation of the contributions made by specific items in each diet; the latter basis shows the actual amounts con- sumed in a 24-hr period. In evaluating the chemical constituents consumed byan individual in a 24-hr period, the gross weight of the total diet is of much importance. By comparing the proximate chemical composition on a percentage basis with the published chemical composition of some of the items constituting the samples, it is possible to account for the variation in moisture. fat, protein, carbohydrate and ash content of the different diets. Since information on the nutritional as- pects of the Rongelapese diet is limited, comparison of the data with data for other areas is probably not meaningful. The gross percentage composition indicates that the diets are generally lowin fat, protein, and ash but fairly high in carbohydrate content. When the data in Table 3 are compared with the recommended daily dietary allowances published by the Food and Nutrition 3oard of the National Research Council, the ee rate aati et 3 I 2 3