the anomalous origin of the right coronary artery (rca) as a branch from the left anterior descending artery (lad) is a very rare variation of the single coronary artery anomaly. the anomalous vessel arises from the proximal or midportion of the lad and courses anterior to the pulmonary artery trunk in most instances. in this case report, a 61-year-old woman is introduced who underwent coronary...

thorough understanding of the anatomic and internal morphology of a root canal system is absolutely essential for the success of endodontic treatment. since permanent maxillary first molars have shown variation in internal anatomy, morphology, this tooth has been reviewed extensively. presence of two canals in a two-rooted maxillary first molar has rarely been reported in studies describing too...

We propose a new theory to explain developmental aberrations in plant hybrids. In our theory, hybrid incompatibilities arise from imbalances in the mechanisms that cause male sterility in hermaphroditic plants. Mitochondria often cause male sterility by killing the tapetal tissue that nurtures pollen mother cells. Recent evidence suggests that mitochondria destroy the tapetum by triggering stan...

Telomeres in cells that use the recombination-mediated alternative lengthening of telomeres (ALT) pathway elicit a DNA damage response that is partly independent of telomere length. We therefore investigated whether ALT telomeres contain structural abnormalities that contribute to ALT activity. Here we used next generation sequencing to analyze the DNA content of ALT telomeres. We discovered th...

Abstract Study question Does advancing male age influence the frequency of occurrence sperm abnormalities? Summary answer Advancing was associated with increased incidence certain head and tail defects – elongated head, nuclear vacuoles, coiled tail. What is known already Evaluation reproductive potential based mainly on motility morphology. Morphological features serve as a reliable indicator ...

in the framework of non-proliferation treaty (npt) it has been enumerated three objectives as follow: 1) peaceful use of nuclear energy; 2) non-proliferation of nuclear weapons and 3) nuclear disarmament. the writers in this article have studied and analyzed multilateral aspects of the right of peaceful use of nuclear energy, and interpretation of some npt articles (1, 2 and 4).in the conclusio...

This is an Open distribution, Abstract – This study investigated the cytotoxic and genotoxic potential of perfluorododecanoic acid (PFDoA), a perfluorinated carboxylic chemical (PFC) that has broad applications and distribution in the environment in Japanese medaka,Oryzias latipes. Micronucleus (MN) test and Comet assay were used for the toxicity study. Three groups of fish were exposed to 0.1m...