Experiment Station Record, Volume 92, January-June, 1945 Page: 162
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162 EXPERIMENT STATION RECORD tVol. 92
Histamine content of unprocessed and canned fish: A tentative method for
quantitative determination of spoilage, E. GEIGER. (Food Res., 9 (1944), No. 4,
pp. 293-297, illus. 1).-"It is proposed to use the determinations of the histamine
content as one criterion for the relative freshness of fish."
Calcium, phosphorus, and iron contents of turnip greens'as influenced by
method of sampling, J. WHITACRE, S. H. YARNELL, A. G. OBERG, J. M. MCCRERY,
and L. MCWHIRTER. (Tex. Expt. Sta.). (Food Res., 9 (1944), No. 1, pp. 5665,
illus. 1).-"Three methods of sampling have been used for harvesting turnip
greens-random from single 16-ft. rows, composite-random from the same rows,
and total-population from 16-ft. rows each divided into four plats. Samples consisted
of 1,500 to 2,000 gm. each. Two sets of four rows each provided the random
samples; from each set, four single-row and four composite were taken, a total of
16 samples. For the total-population samples four rows of four plats each were
used to supply 16 samples. Moisture in the fresh greens and calcium, phosphorus,
and iron in the dried material were determined.
"Mean values of four samples from each method of sampling gave acceptably
low standard errors and standard deviations in comparison with total population
from 10-ft. rows. With calcium only one significant difference was found between
comparable samples, which were one pair of single-row and composite-random
samples. The explanation offered is the higher proportion of outer leaves in the
single-row sample, which was higher in calcium than in the composite. Significant
differences in phosphorus and iron content were found in only part of the totalpopulation
samples. One row was significantly higher in phosphorus than the
other three, which did not differ significantly among themselves. Three significant
differences were found among six row v. row comparisons of iron in total-population
samples. All rows were involved in these differences. The rows ranked in
an entirely different order in mean content of iron than in phosphorus; the row
of highest value in phosphorus held third place, in iron. The possibility is suggested
that variation in soil was responsible for the inconsistent differences in
phosphorus and iron. The findings in this study point to the economy of time
and labor in the use of no more than four random-composite samples taken from
several rows to determine the approximate composition of greens, provided experimental
design, sufficient homogeneity of the soil, and uniformity of cultural treatment
Proposed use of starch sponges as internal surgical dressings absorbable by
the body, C. W. BICE, M. M. MACMASTERS, and G. E: HILBERT. (U. S. D. A.).
(Science, 100 (1944), No. 2593, pp. 227-228).- A 5-percent suspension of purified
cornstarch is pasted by heating and then sterilized by heating in an autoclave for
15-20 min. at 15 lb. per square inch gauge pressure. The autoclaved paste is placed
in shallow pans or other containers, as desired, and frozen slowly, preferably at
a temperature just below 0 C. The higher the freezing temperature, the coarser
and stronger is the resulting sponge. When freezing is complete, the paste is
removed from the freezer and allowed to thaw. Sponges having different textures
may be prepared by varying the pasting and freezing conditions and the kind and
concentration of starch used. Sterile sponges can be prepared by autoclaving the
paste and carrying out the rest of the preparation under aseptic conditions, or
the final product can be simultaneously toughened anc sterilized by immersion in
70-percent alcohol. Dried sponges can be sterilized by autoclaving, as is absorbent
Starch sponges will take up 15-18 times their own weight of aqueous or alcoholic
solutions. Unlike cotton, they are firm enough to retain the absorbed liquid
during gentle handling. They can be air-dried at temperatures up to 105 to light,
rather brittle masses which return rapidly to their original soft state when re
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U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations. Experiment Station Record, Volume 92, January-June, 1945, book, 1947; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5064/m1/175/: accessed December 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.