排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
Christena Visser-Tenyenhuis B. N. S. Murthy Joseph Odumeru Praveen K. Saxena 《In vitro cellular & developmental biology. Plant》1994,30(3):140-143
Summary The Ringo Rose cultivar of zonal geranium (Pelargonium x hortorum Bailey) has been shown to be morphogenetically unresponsive. Attempts to improve somatic embryogenesis using various seed
stress treatments before germination proved ineffective. However, bacterial contamination of one of the seed-stress treatments
led to infected explants that had a significant increase in frequency of high-quality somatic embryos. The co-cultivation
of explants with the isolated bacterium (tentatively identified asBacillus sp.) was found to be repeatable, and potentially represents a novel way to improve morphogenesis in geranium and possibly
other species. 相似文献
2.
This paper describes the historical evolution of the Kawasaki disease (KD) case definition and its limitations for identification and treatment of children at risk for coronary artery aneurysms (CAA). The dominant view of pathogenesis is that an unknown agent infects infants and children, who then develop the signs of KD. Some of the infected infants and children then develop CAA, and a few die from myocardial infarction. Because the etiologic agent remains unknown, diagnosis of KD relies on observation and recognition of the clinical signs that comprise the KD case definition criteria. This approach has been successful in identifying and treating many children at risk for CAA. Unfortunately, however, it has delayed the effective treatment of children who fail to meet the KD case definition criteria but who, nevertheless, develop CAA. The original case definition was developed before the general acceptance of CAA as sequelae of KD, the availability of the echocardiogram, and effective treatment with intravenous immunoglobulin. Despite an evolution in awareness, detection, and treatment of possible CAA sequela, the case definition has not been altered so as to incorporate this knowledge. Our investigation explores the transformation of the case definition from an epidemiological instrument to a diagnostic tool. We urge the construction of a more sensitive KD case definition that includes signs and laboratory findings associated with CAA. 相似文献
1