Enabling the production of solar fuels on a global scale through artificial photosynthesis requires the development of water oxidation catalysts with significantly improved stability. The stability of photosystems is often reduced owing to attack by singlet oxygen, which is produced during light harvesting. Here, we report photochemical water oxidation by CoFPS, a fluorinated Co-porphyrin desig...

Heart attack and stroke are life and death emergencies. The cardiovascular system is complexclosed hydraulic system, which perform the essential service of transportation of oxygen,carbon dioxide, numerous chemical compounds and the blood cells. Patients suffering fromheart attack have to undergo regular check up of their heart functioning. It is highly risk takingjob, as th...

background: previous literatures have shown a transient ischemic attack  (tia) mimic rate  of 9-31%. we aimed  to ascertain the proportion of stroke mimics amongst suspected tia patients. methods: a prospective observational study was performed in   ghaem   hospital,   mashhad,   iran   during   2012-2013. consecutive tia patients  were identified in a stroke center. the  initial diagnosis  of ...

The blades of wind turbines are the most important parts in producing power output. In this study, a section of a 660 KW wind turbine blade will be installed in Iran in near future was tested in a wind tunnel. In addition to steady tests, various unsteady tests including the effects of reduced frequency, mean angle of attack, and amplitudes were carried out. The preliminary results show strong ...

Modelling and simulation techniques offer a comprehensive method for assessing the impact of a terrorist attack, allowing multiple scenarios to be simulated with ease without imposing extensive time or cost constraints. The aim of this paper is to provide a comprehensive model for the different categories of users who are likely to be involved in the modelling and simulation of a terrorist atta...

Environment safety measurements have resulted in use of peroxide as bleaching chemical in place of chlorine and chlorine dioxide. Concentration and composition of chemicals affects corrosion aspects, the suitability of existing plant metallurgy and materials of construction of bleach plants. Accordingly long term immersion and electrochemical corrosion tests were conducted on stainless steel 30...

cerebrovascular attack (cva) and transient ischemic attack (tia) are major causes of emergency department visits around the globe. a significant number of these patients may experience repeat attacks if left untreated. several risk stratifying scoring systems have been developed in recent years to point out the high risk patients. abcd 2 is based on age, blood pressure, clinical status, diabete...

Enzymatic synthesis and hydrolysis of nucleoside phosphate compounds play a key role in various biological pathways, like signal transduction, DNA synthesis and metabolism. Although these processes have been studied extensively, numerous key issues regarding the chemical pathway and atomic movements remain open for many enzymatic reactions. Here, using the Mason-Pfizer monkey retrovirus dUTPase...

An experimental study was performed to investigate the effects of the body angle of attack on the tail surface pressure distribution for a half body-tail combination in subsonic flow. The results show, in small deflection angle regions, that the tail deflection has the same effect on the surface pressure as the body angle of attack. However at moderate to high deflections, the flowfiled caused ...

Corrosion is a problem that has plagued man ever since he turned to the use of metals; corrosion is defined as the destructive alteration of a metal by reaction with its environment. Corrosion, viewed in a broad sense, has two main causes; these are: 1. Chemical-a direct cause. In this instance, an attack occurs on refined metals by acids, chemical fumes, moisture, and air. 2. Biological-an ind...