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Volume 2, Issue 5, November 2012

About the Cover

Marie Curie was born in Warsaw on November 7, 1867, the daughter of a secondary-school teacher. She received a general education in local schools and some scientific training from her father. In 1891, she went to Paris to continue her studies at the Sorbonne in Physics and the Mathematical Sciences. She met Pierre Curie, Professor in the School of Physics, in 1894 and in the following year they were married. Madame Marie Curie was one of the first woman scientists and one of the great scientists of the 20th century. She discovered radium and paved the way to nuclear physics and cancer therapy. Marie Curie fought chauvinism, prejudices, sexism and plain stupidity of those who tried to stop her advancements in science. Curie developed methods for the separation of radium from radioactive residues in sufficient quantities to allow for its characterization and the careful study of its properties, therapeutic properties in particular. She received many honorary science, medicine and law degrees and honorary memberships of learned societies throughout the world. Together with her husband, she was awarded half of the Nobel Prize for Physics in 1903, for their study into the spontaneous radiation discovered by Becquerel, who was awarded the other half of the Prize.

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DISCOVERY OF THE MONTH

November 8, 1895: Roentgen's Discovery of X-Rays

Anam Haider

Wilhelm Roentgen, a German professor of physics, was the first person to discover electromagnetic radiation in a wavelength range commonly known as X-rays today. Roentgen was the first one to study X-rays systematically. To highlight the unknown nature of his discovery, he called them X-rays though they are still known as Roentgen-rays as well. For his remarkable achievement he was honored with the first Nobel Prize in Physics in 1901.

Discovery, 2012, 2(5), 27-28

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REVIEWS

Cloud Security: Analysing the risks involved in Cloud computing environments

Anju Yadav, Kavita Rani, Anu Sheoran, Gurpreet, Neha Gupta, Juhi

There is a growing development of using cloud environments forever growing storage and data processing requirements. However, adopting a cloud computing paradigm has positive as well as negative effects on the data security of service consumers. This paper primarily aims to highlight the major security issues existing in current cloud computing environments. We carry out a study to explore the security mechanisms that are compulsory by major cloud service providers.

Discovery, 2012, 2(5), 29-33

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RESEARCH

Microgram determination of iridium (III) by kinetic spectrophotometric method

Anjali Goel, Shakunj

A method for the determination of iridium is based on the Ir(III) catalyzed oxidation of alanine by hexacyanoferrate(III) in aqueous alkaline medium by kinetic - spectrophotometric analysis. By this method Beer’s law is obeyed in the range of 2.99 to 19.98 μg cm-3 of Ir(III). The molar absorptivity & sandell’s sensitivity are found 1.0 x 103 to 1.3 X 103 l mol-1 cm-1 and 0.145 to 0.192 μg cm-2 respectively. The value of correlation coefficient lies between 0.999 to 0.985. The effect of few interfering ions have been worked out for developing the calibration curves in terms of absorbance or reaction rate or pseudo first order rate constant vs. Ir(III) plot, absorbance was noted at max of 420 nm.

Discovery, 2012, 2(5), 34-36

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