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David Lark
David Lark

Where Can I Buy Micro Magnets



Welcome to the Molecular Expressions website featuring our acclaimed photo galleries that explore the fascinating world of optical microscopy. We are going where no microscope has gone before by offering one of the Web's largest collections of color photographs taken through an optical microscope (commonly referred to as "photo-micro-graphs"). Visit our Photo Gallery for an introductory selection of images covering just about everything from beer and ice cream to integrated circuits and ceramic superconductors. These photographs are available for licensing to commercial, private, and non-profit institutions.




where can i buy micro magnets



Secret Worlds: The Universe Within - Soar through space starting at 10 million light years away from the Milky Way down through to a single proton in Florida in decreasing orders of magnitude (powers of ten). This tutorial explores the use of exponential notation to understand and compare the size of things in our world and the universe, and provides a glimpse of the duality between the macroworld around us and the hidden microworld within.


Purchase Nikon's Small World 2020 Calendar - The Nikon Small World 2019 Calendar available now is printed in full color on 10.5 x 13.5 semi-gloss paper and spiral bound for mounting on the wall. The Nikon Small World Competition has brought together photomicrographers of all levels and disciplines for the past 45 years, and united them in a competition that truly celebrates and honors the intersection of science with art. Included in the calendar are the top 20 prize winners, the 10 honorable mentions, and all images of distinction. Winning entries include Fluorescent turtle embryo,Blood vessels of a mouse, color coding of freshwater protozoans, frozen water droplet, Chinese red carnation stamen, Male mosquito, BPAE cells in telophase stage of mitosis, copper oxide, Alligator embryo, spiders, snowflake, Octopus embryo and plenty more found under the world of the microscope. This year the contest had over 2,000 entries from a 84 countries. Each photomicrograph was judged by an independent panel of notable science and academic authority.


Spinning Disk Confocal Microscopy - Spinning disk microscopy has advanced significantly in the past decade and now represents one of the optimum solutions for both routine and high-performance live-cell imaging applications. The rapid expansion in biomedical research using live-cell imaging techniques over the past several years has been fueled by a combination of events that include dramatic advances in spinning disk confocal microscopy instrumentation coupled with the introduction of novel ultra-sensitive detectors and continued improvements in the performance of genetically-encoded fluorescent proteins.


Spectral Imaging and Linear Unmixing - Spectral imaging and linear unmixing is becoming an important staple in the microscopist's toolbox, particularly when applied to the elimination of autofluorescence and for FRET investigations. Instruments equipped for spectral imaging are becoming increasingly popular and many confocal microscopes now offer this capability. Widefield fluorescence and brightfield microscopy are also being used more frequently for resolving complex fluorophore and absorbing dye mixtures, a trend that should continue into the future.


Carl Zeiss MicroImaging Online Campus - Visit the new ZEISS website that explores the fascinating world of optical microscopy and provides the necessary background to understand both the basic concepts and advanced principles. Included are review articles, interactive Flash tutorials, reference materials, and image galleries.


Light Sources for Optical Microscopy - The performance of the various illumination sources available for optical microscopy depends on the emission characteristics and geometry of the source, as well as the focal length, magnification and numerical aperture of the collector lens system. In gauging the suitability of a particular light source, the important parameters are structure (the spatial distribution of light, source geometry, coherence, and alignment), the wavelength distribution, spatial and temporal stability, brightness, and to what degree these various parameters can be controlled.


Live-Cell Imaging - An increasing number of investigations are using live-cell imaging techniques to provide critical insight into the fundamental nature of cellular and tissue function, especially due to the rapid advances that are currently being witnessed in fluorescent protein and synthetic fluorophore technology. As such, live-cell imaging has become a requisite analytical tool in most cell biology laboratories, as well as a routine methodology that is practiced in the wide ranging fields of neurobiology, developmental biology, pharmacology, and many of the other related biomedical research disciplines. Among the most significant technical challenges for performing successful live-cell imaging experiments is to maintain the cells in a healthy state and functioning normally on the microscope stage while being illuminated in the presence of synthetic fluorophores and/or fluorescent proteins.


Comparing Confocal and Widefield Fluorescence Microscopy - Confocal microscopy offers several distinct advantages over traditional widefield fluorescence microscopy, including the ability to control depth of field, elimination or reduction of background information away from the focal plane (that leads to image degradation), and the capability to collect serial optical sections from thick specimens. The basic key to the confocal approach is the use of spatial filtering techniques to eliminate out-of-focus light or glare in specimens whose thickness exceeds the dimensions of the focal plane. This interactive tutorial explores and compares the differences between specimens when viewed in a confocal versus a widefield fluorescence microscope.


Introduction to Image Processing and Analysis - John Russ has taught hands-on courses and extended workshops in image processing and analysis to more than 3000 students, worldwide, over the course of his career. His one-day tutorials and lectures, sponsored by various professional societies and other organizations, have reached several thousand more. But the need to have a basic understanding of these topics is far wider than he can ever reach in person. Potentially everyone working with images, and certainly that includes every microscopist, needs to be aware of the possibilities (and limitations) of computer-based image processing and measurement. The descriptive reviews and interactive tutorials in this section cover most of the topics that the author discusses in typical one-day tutorials.


Rat Brain Tissue Sections - The rat brain has served as an excellent model for elucidating the complex anatomy and physiological mechanisms of the human brain. As a result, a significant amount of information on brain diseases, such as dementia and Parkinson's disease, has been determined from investigations using rat brains. Brain tissue has been mapped into dozens of major and hundreds of minor regions that are anatomically and functionally distinct. Individual brain cells segregate into specialized areas by expressing a wide spectrum of specific housekeeping proteins, enzymes, transporters, and receptors. This digital image gallery explores many regions of the rat brain as observed with immunofluorescence in coronal, horizontal, and sagittal thick sections using laser scanning confocal microscopy.


Laser Scanning Confocal Microscope Simulator - Perhaps the most significant advance in optical microscopy during the past decade has been the refinement of mainstream laser scanning confocal microscope (LSCM) techniques using improved synthetic fluorescent probes and genetically engineered proteins, a wider spectrum of laser light sources coupled to highly accurate acousto-optic tunable filter control, and the combination of more advanced software packages with modern high-performance computers. This interactive tutorial explores multi-laser fluorescence and differential interference contrast (DIC) confocal imaging using the Olympus FluoView FV1000 confocal microscope software interface as a model.


Nikon MicroscopyU - The MicroscopyU website is designed to provide an educational forum for all aspects of optical microscopy, digital imaging, and photomicrography. Together with the scientists and programmers at Molecular Expressions, Nikon microscopists and engineers are providing the latest state-of-the-art information in microscope optics and imaging technology including specialized techniques such as fluorescence, differential interference contrast (DIC), phase contrast, reflected light microscopy, and microscopy of living cells. We invite you to explore MicroscopyU and discover more about the exciting world of optics and microscopy.


Human Pathology Digital Image Gallery - The investigation of disease in humans has, understandably, been one of the primary focal points in medicine for thousands of years. The image gallery presented in this section attempts to illustrate, through use of the brightfield microscope, many of the pathological conditions that are readily observed in stained human specimens. Each image was chosen for artistic merit, photographic quality, and content. Note that several of the images in this gallery might not depict every aspect of the pathological condition under which they are catalogued.


Nikon Fluorescence Microscopy Digital Image Gallery - The widefield reflected light fluorescence microscope has been a fundamental tool for the examination of fluorescently labeled cells and tissues since the introduction of the dichromatic mirror in the late 1940s. Furthermore, advances in synthetic fluorophore design coupled to the vast array of commercially available primary and secondary antibodies have provided the biologist with a powerful arsenal in which to probe the minute structural details of living organisms with this technique. In the late twentieth century, the discovery and directed mutagenesis of fluorescent proteins added to the cadre of tools and created an avenue for scientists to probe the dynamics of living cells in culture. This gallery examines the fluorescence microscopy of both cells and tissues with a wide spectrum of fluorescent probes. 041b061a72


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