Biomimetic, Mild Chemical Synthesis of CdTe-GSH Quantum Dots with Improved Biocompatibility

Multiple applications of nanotechnology, especially those involving highly fluorescent nanoparticles (NPs) or quantum dots (QDs) have stimulated the research to develop simple, rapid and environmentally friendly protocols for synthesizing NPs exhibiting novel properties and increased biocompatibility

Finishing the euchromatic sequence of the human genome

The sequence of the human genome encodes the genetic instructions for human physiology, as well as rich information about human evolution. In 2001, the International Human Genome Sequencing Consortium reported a draft sequence of the euchromatic portion of the human genome. Since then, the international collaboration has worked to convert this draft into a genome sequence with high accuracy and nearly complete coverage. Here, we report the result of this finishing process. The current genome sequence (Build 35) contains 2.85 billion nucleotides interrupted by only 341 gaps. It covers ∼99% of the euchromatic genome and is accurate to an error rate of ∼1 event per 100,000 bases. Many of the remaining euchromatic gaps are associated with segmental duplications and will require focused work with new methods. The near-complete sequence, the first for a vertebrate, greatly improves the precision of biological analyses of the human genome including studies of gene number, birth and death. Notably, the human enome seems to encode only 20,000-25,000 protein-coding genes. The genome sequence reported here should serve as a firm foundation for biomedical research in the decades ahead

Dual Beam Spectrometer

This Quick Time movie describes the operation of a dual beam spectrometer using an optical wedge to improve the accuracy of the absorbance measurement. The movie includes narration and graphs which explain the technological concepts involved. Running time for the movie is 3 minutes and 55 seconds

Animations in an Instrumental Methods Chemistry Class?

This website provides an introduction to animations as a tool for teaching instrumental techniques in the instrumental analysis course - why one might wish to use animations, some information on how to go about developing them, and it provides a number of examples of animations for analytical instrumentation. The site should prove a valuable resource to college educators teaching analytical chemistry

Photomultiplier tube

This simulation shows how the photomultiplier worksComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Químic

The photoelectric effect

This simulation shows how the photoelectric effect can be used to calculate the energy of the photon and, therefore, the corresponding wavelengthComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Químic

Atomic absorption spectroscopy

The media shows the outline of each piece of equipment used in spectroscopy, atomic absorption and the unit operating mechanism. It also describes the calibration method to find the concentration of an unknown sampleComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Químic

How a grating works

This simulation shows how the diffraction is used to turn a polychromatic radiation that focuses on the diffraction networks monochromaticComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Químic

Double beam UV/Vis spectrophotometer

This simulation shows how a spectrophotometer works. Besides that, it shows the function of each component of the equipment. It also shows how to choose the best component depending on the sample that will be analyzedComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Químic

The photoelectric effect

This simulation shows how the photoelectric effect can be used to calculate the energy of the photon and, therefore, the corresponding wavelengthComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Químic