Atrial fibrillation: the role of hypoxia-inducible factor-1-regulated cytokines

Molecular and Cellular Biochemistry - Atrial fibrillation (AF) is a common arrhythmia that has major morbidity and mortality. Hypoxia plays an important role in AF initiation and maintenance....     

Cytological basis for a tetraspory in Cupressus sempervirens L. megagametogenesis and its implications in genetic studies

 The processes of megasporogenesis and early megagametogenesis were cytologically investigated in Cupressus sempervirens L. in order to elucidate, at the cellular level, the origin of the megagametophyte. After pollination, sporogenous tissue developed in the chalazal region of the nucellus, but only one megaspore mother cell differentiated and divided meiotically without cell-wall formation. This led to the development of a cell with four nuclei which directly functioned as a megaspore. The C. sempervirens megagametophyte is thus tetrasporic, in contrast to the majority of conifers where the megagametophyte is monosporic. The consequenses of this observation are discussed from a genetics point of view. Received: 15 August 1997 / Accepted: 19 September 1997     

An efficient malware detection approach with feature weighting based on Harris Hawks optimization

Cluster Computing - This paper introduces and tests a novel machine learning approach to detect Android malware. The proposed approach is composed of Support Vector Machine (SVM) classifier and...