In this article, we generalize the concept of the Lie algebra of vector fields to the set of smooth sections of a T-bundle which is by definition a canonical generalization of the concept of a tangent bundle. We define a Lie bracket multiplication on this set so that it becomes a Lie algebra. In the particular case of tangent bundles this Lie algebra coincides with the Lie algebra of vector fie...

background: isolated right bundle branch block (rbbb) is a common finding in the general population. the atrioventricular node (avn) artery contributes to the blood supply of the right bundle branch. our hypothesis was that the anatomy of the avn artery and the pattern of dominancy differ between subjects with and without rbbb. methods: w e retrospectively studied the coronary angiography of 92...

introduction: skin resistance is greatly dependent on its collagen amount and nutritional substances such as crude protein that affect the skin collagen can indirectly influence the skin resistance and increase its strength. in this regard, this study aimed to evaluate the effect of in ovo methionine injection on histomorphometry of the skin layers. methods: thirty fertilized eggs of ross 308 b...

Fluctuations in intracellular calcium ion concentration ([Ca]i) constitute the main link in excitation-contraction coupling in the airway smooth muscle cells (ASMC). It has been recently reported that acetylcholine induces asynchronous recurring Ca waves in the intact ASMC of murine bronchioles. Using a novel technique that allows us to simultaneously measure sub-cellular [Ca]i and force genera...

Fluctuations in intracellular calcium concentration ([Ca2+]i) constitute the main link in excitation-contraction coupling (E-C coupling) in airway smooth muscle cells (ASMC). It has recently been reported that ACh induces asynchronous recurring Ca2+ waves in intact ASMC of murine bronchioles. With the use of a novel technique allowing us to simultaneously measure subcellular [Ca2+]i and force g...

C4 PHOTOSYNTHESIS—THE BASICS C4 photosynthesis is a unique blend of biochemical, anatomical, and gene regulatory characteristics. In the vast majority of C4 plants, i.e. with the exception of single-cell C4 photosynthesis in the Chenopodiaceae, this photosynthetic pathway is the result of the integrated metabolic activities of two distinct, specialized leaf cell types, mesophyll and bundle shea...

background and objectives: heracleum persicum aerial parts have been used in iranian folk medicine for their therapeutic activities and as a spice and flavoring agent in iranian foods and pickles. the present research was conducted to evaluate the pharmacognostic profile of h. persicum which will be useful in standardization for quality, purity, and sample identification. methods: for quality c...

Background and objectives: Heracleum persicum aerial parts have been used in Iranian folk medicine for their therapeutic activities and as a spice and flavoring agent in Iranian foods and pickles. The present research was conducted to evaluate the pharmacognostic profile of H. persicum which will be useful in standardization for quality, purity, and sample ide...