How a leaf is patterned

How Effective is Clinical Supervision in Nursing? A Systematic Review

Background: Clinical supervision is a process of learning and professional support for nurses in developing their practice through regular discussions with experienced and knowledgeable colleagues. However, it remains challenging to ensure the effectiveness of its implementation across healthcare organizations. This review is going to answer the question: What effect does clinical supervision h...

How is the Mother Tongue Acquired

Platelet Refractoriness and how it is formed

Abstract Background and Objectives Transfusion of platelet has become one of the main treatments for thrombocytopenic patients to reduce the severity and frequency of bleeding consequences. Failure to attain the desired level of platelets in a patient following platelet transfusion is defined as platelet refractoriness. The purpose of present paper is to review and study the mechanisms involve...

How strong is intracanopy leaf plasticity in temperate deciduous trees?

Intracanopy plasticity in tree leaf form is a major determinant of whole-plant function and potentially of forest understory ecology. However, there exists little systematic information for the full extent of intracanopy plasticity, whether it is linked with height and exposure, or its variation across species. For arboretum-grown trees of six temperate deciduous species averaging 13-18 m in he...

How a leaf gets its shape.

Leaves are formed from a group of initial cells within the meristem. One of the earliest markers of leaf initiation is the down-regulation of KNOX genes in initial cells. Polar auxin activity, MYB and LOB domain transcription factors function to keep KNOX out of the initiating leaf. If KNOX genes are expressed in initial cells, leaves fail to form. As the leaf grows away from the meristem, its ...