Showing papers by "University of Costa Rica published in 1972"
TL;DR: Family Planning Program Evaluation is not a well-developed art, much less an exact science, and the prospects for improvement of FPPE depend, to a great extent, on overcoming constraints.
Abstract: Family Planning Program Evaluation is not a well-developed art, much less an exact science. The evaluation of the performance of such programs has received a good deal of attention but the methodologies are still controversial and the results inconclusive. This is due to a wide variety of constraints, not all of which are technical, and most of which are not unique to family planning. The prospects for improvement of FPPE depend, to a great extent, on overcoming these constraints.
28 citations
TL;DR: Human poisoning caused by ingestion of unripe fruit of Passiflora adenopoda is reported, apparently for the first time, and the presence of a cyanogenetic B-glycoside is suggested in P. adenoboda.
Abstract: Human poisoning caused by ingestion of unripe fruit of Passiflora adenopoda is he re reported, apparently for the first time. HCN is produced in the pericarp and aril of tbe unripe fruit, as well as in the primary stem, petiole, bracts and stipules but not in tendrils. HCN yield has been reported previously in Passifloraceae only from vegetative parts. The pericarp and arils of completely ripe fruit of Passiflora adenopoda were found free of HCN. The presence of a cyanogenetic B-glycoside is suggested in P. adenopoda.
5 citations
TL;DR: The change of growth from an accelerated phase to a much slower rate seems correlated with attainment of sexual maturity as well as related to weaning and the development of the masticatory and facial muscles.
Abstract: At birth, the catton rat skull is oval and the braincase continues to expand during the first 20 days to near the adult size. Subsequently with the development of the dorsal area and the extension of the bones at the base of the braincase, the rounded form is transformed into the typical long-snouted appearance of the adult. Skull measurements demonstrate the initial rapid expansion of the braincase and the subsequent extension of the rostrum. Adult skull size is attained within the first 100 days of life. Normally, during the first days after birth, height of the braincase is greater than the length of the post-palatal area. However, at 20 to 30 days growth in the latter is greatest and its dimensions surpass those of the former. In three species, Sigmodoll hispidru, Sigmodon alleni and Sigmodon ochrognathus , the rostral length exceeds the height of the braincase only after the animals are over 100 days old. At 40 days palatal and maxillary tooth-row lenglbs are ncar the maximum adult size, while tbe diastema is 50 to 67 percent (depending on the species). At birth the zygomatic arches are small but rapidly expand laterally in comparison with the slower-growing braincase. This process, together with the lengthening of the rostral region is related to weaning and the development of the masticatory and facial muscles. The change of growth from an accelerated phase (1 to 40 days) to a much slower rate seems correlated with attainment oi sexual maturity.
4 citations
TL;DR: It was shown that flaming did not reduce contamination significantly either under usual laboratory conditions or when the laboratory atmosphere had been seeded with a test organism so as to achieve higher rates of colony-forming settling particles.
Abstract: The effect of flaming the mouth of cotton-plugged broth tubes upon the contamination of media during culture transfers was studied. It was shown that flaming did not reduce contamination significantly either under usual laboratory conditions or when the laboratory atmosphere had been seeded with a test organism so as to achieve higher rates of colony-forming settling particles.
4 citations
TL;DR: From study of sections of the fruiting body in different stages of development, it is concluded that the gleba is not interrupted from its origin and thus the axial tissue never reaches the volva, and the prosenchymatous internal layer of the Volva is intimately connected with the "veins" of the gleva and becomes part of its lacunose system.
Abstract: A new collection of Xylophallus xylogenus, made at the same latitude as the type, confirms rotting wood as its natural substrate. The unpleasant odor of its gleba, typical of the phalloids, and its attraction to insects are reported. From study of sections of the fruiting body in different stages of development, we conclude that the gleba is not interrupted from its origin and thus the axial tissue never reaches the volva. The prosenchymatous internal layer of the volva is intimately connected with the "veins" of the gleba and becomes part of its lacunose system. The presence of a pore at the apex of the receptacle in unopened eggs is confirmed. As fruiting bodies mature, the pore becomes wider. The apparent continuity between the axial tissue and the volva in one specimen is assumed to result from swelling of one of the apical "veins" of the gleba due to pressure exerted by elongation of the stalk. When stained with safranin, the hyaline spores show a central zone of red cytoplasm surrounded by a large colorless portion. In material mounted in Amann's lactophenol with cotton blue, the spores mostly have a vacuole at both ends of the long ,axis; however, spores occasionally have three vacuoles or just one central vacuole. That the only known collections of X. xylogenus were made at the same latitude seems to confirm the narrow distribution of the species and its rarity. Xyllophallus xylogenus grows on wood in rather large colonies with the fruiting bodies joined by stolon-like rhizomorphs.
4 citations
17 Aug 1972
1 citations