Nanoparticles have a very large surface area compared to their volume, so they are often able to react very quickly. This makes them useful as catalysts to speed up reactions. For example, they can be used in self-cleaning ovens and windows. However, there is also the possibility that they might speed up reactions in living things in unpredictable ways, perhaps causing illness or death.

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what is the spontaneous emission and what is the stimulated emission ppt? ....etc

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SPECT, the acronym for Single Photon Emission Computed Tomography, is a nuclear medicine imaging modality, giving information about a patient?s specific organ or body system. The patient is injected with a radiopharmaceutical, which will emit Gamma rays. The radio activity is collected by an instrument called gamma camera and the image is reconstructed. SPECT is used to make three dimensional images of the heart, to perform brain studies and for skeletal scintigraphy. It is reasonable to speculate about a constant by perhaps a slower rate of in ....etc

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INTERNAL COMBUSTION ENGINES ARE USED IN A VARIETY OF STATIONARY APPLICATIONS RANGING FROM POWER GENERATION TO INERT GAS PRODUCTION.
BOTH SPARK AND COMP. ENGINES CAN BE FOUND.
A VARIETY OF FUELS CAN BE USED FOR I.C.ENGINES.
THE OPERATION OF I.C ENGINES RESULTS IN THE ENISSION OF HYDROCARBONS,CO,NOX,, & PARTICULATE MATTER

INTERNAL COMBUSTION ENGINES ARE USED IN A VARIETY OF STATIONARY APPLICATIONS RANGING FROM POWER GENERATION TO INERT GAS PRODUCTION.
BOTH SPARK AND COMP. ENGINES CAN BE FOUND.
A VARIETY OF FUELS CAN BE USED FOR I.C.ENGINE ....etc

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The economics of international emissions trading

It's possible for a country to reduce emissions using a Command-Control approach, such as regulation, direct and indirect taxes. But that approach is more costly for some countries than for others. That's because the Marginal Abatement Cost (MAC) ? the cost of eliminating an additional unit of pollution ? differs by country. It might cost China $2 to eliminate a ton of CO2, but it would probably cost Sweden or the U.S. much more. International emissions-trading markets we ....etc

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Definition

With the proliferation of portable electronic devices, power efficient data transmission has become increasingly important. For serial data transfer, universal asynchronous receiver / transmitter (UART) circuits are often implemented because of their inherent design simplicity and application specific versatility. Components such as laptop keyboards, palm pilot organizers and modems are few examples of devices that employ UART circuits. In this work, design and analysis of a robust UART architecture has been carried out to minimiz ....etc

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Definition

Emission Computed Tomography is a technique where by multi cross sectional images of tissue function can be produced , thus removing the effect of overlying and underlying activity. The technique of ECT is generally considered as two separate modalities. SINGLE PHOTON Emission Computed Tomography involves the use single gamma ray emitted per nuclear disintegration. Positron Emission Tomography makes use of radio isotopes such as gallium-68, when two gamma rays each of 511KeV, are emitted simultaneously where a positron from a nucl ....etc

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INTRODUCTION
Various types of displays have become common in the every day life. The displays are used in televisions, computers etc. They also have wide use in laboratories and in medical applications. The displays are those devices by which we can view moving objects. The displays are manufactured depending upon their application.

One of the hottest markets driving physics research is the demand for a perfect visual display. People want, for example, large, thin, lightweight screens for high-definition TV and outside displays and very hi ....etc

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Dear sir,
a private is going to come for campus recruitment in our college for which they are expecting us to mke a presentation on automobile emission control. so i am in need of this paper. so i kindly request you to provide me with this paper.
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Vertical Cavity surface Emission Lasers (VCSEL) are lasers that emit light from their surface in contrast with regular ???edge emittersâ„¢. Also they have got a vertical cavity , as the name suggests, which enables surface emission.???Vixels??? , as they are commonly called ,have several superior characteristics compared to their edge emitting counter parts.

VCSEL Semiconductor micro laser diodes which emit light perpendicular to their PN junction in a cylindrical beam vertically from the surface of a fabricated wafer and feature circul ....etc

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