Background: Every year more than 2 million people depart from Iran to Saudi Arabia for Hajj ritual which can be faced with some different diseases. There are not much information about frequencies and trend of diseases in Hajj. The main objective of this study was to determine the trend of prevalent diseases during five consecutive Hajj rituals among Iranian pilgrims. Methods: We est...

Given a positive integer n, we let sfp(n) denote the squarefree part of n. We determine all positive integers n for which max{sfp(n), sfp(n+ 1), sfp(n+ 2)} ≤ 150 by relating the problem to finding integral points on elliptic curves. We also prove that there are infinitely many n for which max{sfp(n), sfp(n + 1), sfp(n + 2)} < n.

Lichen planus is a chronic, autoimmune, mucocutaneous disease that shows differences in clinical presentation at different times of the year. The present retrospective study was conducted to clarify the meteorological factors that influence the incidence of lichen planus, as well as the general features and clinical presentation of this condition during three consecutive years, 2008, 2009, and ...

Opium poppy (Papaver somniferum L.) has two major products: alkaloids in the capsules and the seeds. It is known that opium poppy today contains alkaloid in great quantities. Opiate alkaloids and their synthetic derivatives are widely used in medicines which are produced in hundreds of tons for the medicine industry. The study aimed to screen the capsules of six Turkish opium poppy lines to eva...

Background Sperm cells are one of the most stellar and fascinating cells in all species. One of the most distinctive characteristic of these cells is their movement dynamics which can be observed through a light microscope. The first paper regarding sperm cell biology that appeared on PubMed was presented by Dr. W.F. Whitney (1). There, he showed the staining properties of spermatozoa and it wa...