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1.
Dennis O'Brien 《Arts Education Policy Review》2013,114(6):42-46
Abstract The following article was awarded the third-place Reston Prize 1989, sponsored by the National Association of Schools of Art and Design, the National Association of Schools of Dance, the National Association of Schools of Music, and the National Association of Schools of Theatre. 相似文献
2.
Mary W. Dodge 《Arts Education Policy Review》2013,114(4):40-41
Abstract The following article was awarded the second-place Reston Prize 1989, sponsored by the National Association of Schools of Art and Design, the National Association of Schools of Dance, the National Association of Schools of Music, and the National Association of Schools of Theatre. 相似文献
3.
Maurice Cohen Jr. 《Chromosoma》1976,55(4):359-371
Drosophila melanogaster 5S ribosomal RNA labeled with 125I was used as an in situ hybridization probe to localize complementary sequences in chromosomes of species in the Drosophila virilis group. Whereas virilis, the ancestral species, has two different 5S gene loci, the derived species show only one of these loci; in the two lines that have evolved from virilis it is the opposite locus that is conserved. The possible events leading to such an arrangement are discussed.The author was a Predoctoral Fellow supported by Grant GM 1974 from the National Institute of General Medical Sciences, National Institutes of Health.Contribution from Oak Ridge National Laboratory, operated by the Union Carbide Corporation for the U.S. Energy Research and Development Administration. 相似文献
4.
Summary The rudimentary locus of Drosophila melanogaster is shown to be at least bifunctional. Mutants in different regions of the locus have either no CPSase or no ATCase activity; some mutants lack both activities. The results are discussed in correlation with the complementation and genetic map of the locus.Supported by National Research Council of Canada, grant A-1764 and National Cancer Institute of Canada, grant 6051 to D. T. Suzuki.Researcher, Centre National de la Recherche Scientifique, France and recipient of European Molecular Biology Organization Fellowship. 相似文献
5.
We have found that the phenol oxidase activity in 50-hr Drosophila melanogaster pupae is much greater than that of adult flies. The mutants lz and lz
g have all of the phenol oxidase components present in wild type, whereas the mutant tyr-1 has all of the wild-type components but the activity of each component is greatly reduced in comparison with wild-type activity. The newly discovered lozenge allele, lz
rfg, lacks all phenol oxidase activity.Predoctoral fellow supported by Grant GM 1974 from the National Institute of General Medical Sciences, National Institutes of Health.The Oak Ridge National Laboratory is operated for the U.S. Atomic Energy Commission by Union Carbide Corporation. 相似文献
6.
Tim Eichenberg 《Ocean Development & International Law》2013,44(2):251-254
National Research Council. Dolphins and the Tuna Industry: A Report of the National Academy of Sciences on Reducing Dolphin Mortality from Tuna Fishing. 1992. Washington, DC: National Academy Press. 176 pp. ISBN 0–309–04735–8. $22.95. 相似文献
7.
Fifty rhizobial isolates of Lathyrus and Oxytropis collected from northern regions of China were studied in their genotypic characterization based upon analyses of ARDRA, 16S-23S
IGS PCR-RFLP, TP-RAPD, MLEE, sequences of 16S rDNA gene and housekeeping genes of atpD, recA and glnII. The results demonstrated that most of the Lathyrus rhizobia belonged to Rhizobium and most of the Oxytropis rhizobia belonged to Sinorhizobium. A novel group of Rhizobium sp. I and S. meliloti were identified as the main microsymbionts respectively associated with Lathyrus and Oxytropis species in the collection area, which were new associations between rhizobia and the mentioned hosts. This study also provides
new evidence for biogeography of rhizobia.
Supported by the National Program for Basic S&T Platform Construction (Grant No. 2005DKA21201-1), the National Natural Science
Foundation of China (Grant No. 30670001), and the National Basic Research Program of China (Grant No. 2006CB100206) 相似文献
8.
Summary One- and two-dimensional gel electrophoresis was employed to characterize and compare ribosomal subunit proteins from wild-type D. melanogaster and several mutants, including suppressor-offorked and four X-linked cold sensitive lethals. The sibling species D. simulans was also studied. We found the electropherogram patterns indistinguishable in all cases.This work was supported by grants from the National Institutes of Health (GM 18910, GM 22866) and the National Science Foundation (BM S75-11890) to Edward Berger 相似文献
9.
Ectopic pairing and evolution of 5S ribosomal RNA genes in the chromosomes of Drosophila funebris 总被引:1,自引:1,他引:0
Maurice Cohen Jr. 《Chromosoma》1976,55(4):349-357
5S ribosomal RNA from Drosophila melanogaster labeled with 125I was used to locate the 5S rRNA genes in chromosomes of D. funebris by means of in situ hybridization. Silver grains were observed at three distinct sites, one of which was a recognized reverse repeat. Only one half of the reverse repeat, however, hybridizes with 5S rRNA and the significance of this phenomenon is discussed. A case of ectopic pairing between two different 5S sites in the genome is reported, and the significance of ectopic pairing is considered.The author was a Predoctoral Fellow supported by Grant GM 1974 from the National Institute of General Medical Sciences, National Institutes of Health.Contribution from Oak Ridge National Laboratory, operated by the Union Carbide Corporation for the U.S. Energy Research and Development Administration. 相似文献
10.
Summary
Apl, a gene involved in the processing of lysosomal acid phosphatase in mouse liver, has been mapped on Chromosome 17. The gene order and map distances in per cent recombination of the loci studied are T (20.6±3.4) Pgk-2 (7.4±2.2) Apl. Thus, Apl is at least 7 cM distal to H-2 on this chromosome. In addition, strain-specific allelic variants for Apl have been demonstrated on cellulose acetate gels, a quick and inexpensive method of electrophoresis.This work was supported by Contract NO1-ES42159 with the National Institute of Environmental Health Sciences, Grant 1–476 from the National Foundation, March of Dimes, and Grant GM 20919 from the National Institute of General Medical Sciences. The Jackson Laboratory is fully accredited by the American Association for Accreditation of Laboratory Animal Care 相似文献
11.
Carolyn A. Bailey Runhua Lei Rick A. Brenneman Edward E. Louis Jr 《Conservation Genetics》2009,10(5):1389-1392
Milne-Edwards’ Sifaka (Propithecus edwardsi) is a dark furred lemur with white flanks living in the southern region of the eastern rainforest belt of Madagascar. This
species is endangered due to habitat destruction primarily from deforestation. Twenty-one polymorphic nuclear microsatellite
loci were isolated from a genomic DNA derived from an individual from Ranomafana National Park, Madagascar. Population genetic
parameters were estimated on 10 individuals each, from Andringitra National Park and the Vatoharana Forest in Ranomafana National
Park. 相似文献
12.
Joanna Sumner Jonathan K. Webb Richard Shine J. Scott Keogh 《Conservation Genetics》2010,11(3):747-758
The Broad-headed snake Hoplocephalus bungaroides is one of Australia’s most endangered vertebrates. Extant populations of H. bungaroides are restricted to several geographically isolated reserves to the north, west, and south of Sydney. We analysed mitochondrial
DNA from 184 specimens drawn from across the geographic range of the Broad-headed snake. Phylogenetic analysis demonstrated
that H. bungaroides comprises two divergent mitochondrial lineages with a “northern” clade comprising populations west and north of Sydney and
a “southern” clade comprising animals in Morton National Park. The two clades differ by an uncorrected genetic distance of
1.7%, which implies a divergence dating to approximately 755,000–850,000 years ago. We complemented our molecular data set
with a detailed analysis of morphological variation both between and within the genetic clades. The two H. bungaroides genetic clades are morphologically indistinguishable and show little sexual dimorphism. Our results demonstrate that the
populations north and south of this biogeographic split function as two distinct populations with no recent gene flow. There
is no reason for separate taxonomic recognition of these two clades, but they do represent distinct evolutionarily significant
units (ESUs) that require separate conservation management. In addition, within the northern ESU, populations from Royal National
Park, Blue Mountains National Park, Wollemi National Park, and the Sydney Water Catchment supply areas should be considered
as separate management units to conserve both evolutionary and ecological processes. 相似文献
13.
G. Fornaciari 《Plant biosystems》2013,147(6):544-551
Abstract LINNAEA BOREALIS L. on the occidental slope of the Stelvio National Park. — Distribution of Linnaea borealis L. is here examined within territorial limits of the occidental slope of the National Park on the Stelvio, taking out and noticing, for many stations characteristics of association in which the plant has beenobserved. 相似文献
14.
A new species of the Sphaeromatidae (Thermosphaeroma subequalum) is described from thermal waters (32° –35dgC) in Big Bend National Park, Brewster Co., Texas. A new genus, Thermosphaeroma, is proposed to include the Texas species and other sphaeromatids from hot springs in the American Southwest and Mexico: Exosphaeroma dugesi (Dolffus, 1893) from Aguascalientes, Mexico, and E. thermophilum (Richardson, 1897) from Socorro, New Mexico.Supported by National Park Service Contract PX 7000 3 0502, awarded to Owen T. Lind, Baylor University. 相似文献
15.
Summary The sensitivity to calcium of the human squamous carcinoma cell line, SCC-13, was demonstrated and characterized. Cultures
grown to confluence in the presence of 0.2 to 2 mM calcium had approximately 10-fold higher levels of particulate transglutaminase activity and envelope competence than those
grown in low calcium (0.025 to 0.05 mM) medium. Raising the calcium from 0.025 to 1.8 mM induced expression of this enzyme and of competence over the course of a week. Conversely, for cultures grown to confluence
in 1.8 mM calcium, subsequent reduction of calcium to 0.025 mM resulted in a substantial decline in transglutaminase over a similar time period. Immunoprecipitable transglutaminase was
clearly identifiable in cultures grown in 1.8 mM calcium-containing medium but not in those grown in low calcium medium or in the presence of retinoic acid, suggestive of
regulation at the level of mRNA accumulation or translation rather than posttranslational modification.
This research was supported by Public Health Service grant AR 27130 from the National Institute of Arthritis, Musculoskeletal
and Skin Diseases, Bethesda, MD, and National Research Service postdoctoral fellowship ES 05336 from the National Institute
of Environmental Health Sciences, Research Triangle Park, NC. 相似文献
16.
The objective of this study was to determine if thermophilic fungi exist in the mycoflora of man and in the aeroflora of his environment.Humicola lanuginosa andHumicola grisea were isolated from 5 of 55 samples of outside air. Three thousand cultures were taken from the nasal mucosae, skin surfaces and recta of 570 children. Cultures were incubated at 50°C. Thermophilic fungi were isolated from 6 of 287 children receiving immunosuppressive therapy for malignancies and from 1 of 283 normal children.H. lanuginosa was recovered from the skin of one, the rectum of one and the nasal mucosae of three patients.Mucor pusillus was isolated from the nasopharynges of two patients.Further studies are now indicated to determine the pathogenicity of these organisms with respect to tissue invasive disease, antigenicity and metabolite toxicity.Supported by General Research Support Grant RR-05584 from National Institutes of Health; Cancer Research Center Grant CA-08480 and Training Grant CA-05176 from the National Cancer Institute, National Institutes of Health and by ALSAC. 相似文献
17.
The suppressible eye color mutant purple (pr) of Drosophila melanogaster is known to be unable to synthesize a wild-type complement of pteridine eye pigments. This study measures the reduced levels of drosopterins, sepiapterin, and an unidentified presumed pteridine in pr and pr
bw. Pteridine analyses in double mutants combining pr with one of three other eye color mutants sepia, Henna-recessive3, and prune2, suggest that the metabolic block in pr occurs prior to sepiapterin biosynthesis. Measurements of GTP and GTP cyclohydrolase in pr showed wild-type levels and indicate the metabolic block in pr to be at one of the steps converting dihydroneopterin triphosphate to sepiapterin. Quantitation of pteridines in suppressed purple [su(s)
2; pr and pr; su(pr)
e3] shows restoration of pteridines to wild-type or nearly wild-type levels.T. G. W. is a predoctoral trainee supported by Grant GM 1974 from the National Institute of General Medical Sciences, National Institutes of Health.The Oak Ridge National Laboratory is operated by Union Carbide Corporation for the U.S. Energy Research and Development Administration. 相似文献
18.
19.
The National Research Council's document, Inquiry and the National Science Education Standards (2000) describes an elementary science classroom as one that is composed of learners who are engaged in scientific processes. In such a setting, children ask real-world questions and seek real-world solutions. As students pursue their inquiries, they often move away from science textbooks, and they implement mathematical skills, read literature, conduct research in electronic databases, write stories, and so forth in a larger context. What was originally a regular science lesson becomes an opportunity for integration across the curriculum. This article describes an integrated unit on bats and specifically addresses the National Science Education Standards. 相似文献
20.
Gordon J. Eaton 《Genetica》1968,39(1):371-378
Escape from pre-implantation lethality by homozygousyellow embryos depends on differentiation of trophoblastic cells. The evidence presented herein suggests that progesterone stimulated
differentiation of trophoblastic giant cells in some homozygousyellow blastocysts and thereby increased the percentage ofA
y/Ay “escaper” embryos.
This work was supported in part by funds from research grant HDOOO36, National Institute of Child Health and Development,
National Institutes of Health, U.S.A. 相似文献