Copyright: It is a form of protection provided by law. In the United States this protection is granted to authors of original works of authorship, including literary, dramatic, musical, artistic, and certain other intellectual works. This protection is available to both published and unpublished works. (from Circular of the United States Copyright Office, 6/30/2008)Computer Security: Protective measures against unauthorized access to or interference with computer operating systems, telecommunications, or data structures, especially the modification, deletion, destruction, or release of data in computers. It includes methods of forestalling interference by computer viruses or so-called computer hackers aiming to compromise stored data.Confidentiality: The privacy of information and its protection against unauthorized disclosure.Privacy: The state of being free from intrusion or disturbance in one's private life or affairs. (Random House Unabridged Dictionary, 2d ed, 1993)Microscopy, Electron: Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.Microscopy, Electron, Scanning: Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.Microscopy, Electron, Transmission: Electron microscopy in which the ELECTRONS or their reaction products that pass down through the specimen are imaged below the plane of the specimen.Electron Probe Microanalysis: Identification and measurement of ELEMENTS and their location based on the fact that X-RAYS emitted by an element excited by an electron beam have a wavelength characteristic of that element and an intensity related to its concentration. It is performed with an electron microscope fitted with an x-ray spectrometer, in scanning or transmission mode.Sister Mary Joseph's Nodule: Metastatic lesion of the UMBILICUS associated with intra-abdominal neoplasms especially of the GASTROINTESTINAL TRACT or OVARY.Elements: Substances that comprise all matter. Each element is made up of atoms that are identical in number of electrons and protons and in nuclear charge, but may differ in mass or number of neutrons.Umbilicus: The pit in the center of the ABDOMINAL WALL marking the point where the UMBILICAL CORD entered in the FETUS.Education, Graduate: Studies beyond the bachelor's degree at an institution having graduate programs for the purpose of preparing for entrance into a specific field, and obtaining a higher degree.Hepatitis, Infectious Canine: A contagious disease caused by canine adenovirus (ADENOVIRUSES, CANINE) infecting the LIVER, the EYE, the KIDNEY, and other organs in dogs, other canids, and bears. Symptoms include FEVER; EDEMA; VOMITING; and DIARRHEA.Biological Science Disciplines: All of the divisions of the natural sciences dealing with the various aspects of the phenomena of life and vital processes. The concept includes anatomy and physiology, biochemistry and biophysics, and the biology of animals, plants, and microorganisms. It should be differentiated from BIOLOGY, one of its subdivisions, concerned specifically with the origin and life processes of living organisms.Microscopy: The use of instrumentation and techniques for visualizing material and details that cannot be seen by the unaided eye. It is usually done by enlarging images, transmitted by light or electron beams, with optical or magnetic lenses that magnify the entire image field. With scanning microscopy, images are generated by collecting output from the specimen in a point-by-point fashion, on a magnified scale, as it is scanned by a narrow beam of light or electrons, a laser, a conductive probe, or a topographical probe.Science: The study of natural phenomena by observation, measurement, and experimentation.United States Food and Drug Administration: An agency of the PUBLIC HEALTH SERVICE concerned with the overall planning, promoting, and administering of programs pertaining to maintaining standards of quality of foods, drugs, therapeutic devices, etc.Optics and Photonics: A specialized field of physics and engineering involved in studying the behavior and properties of light and the technology of analyzing, generating, transmitting, and manipulating ELECTROMAGNETIC RADIATION in the visible, infrared, and ultraviolet range.Solutions: The homogeneous mixtures formed by the mixing of a solid, liquid, or gaseous substance (solute) with a liquid (the solvent), from which the dissolved substances can be recovered by physical processes. (From Grant & Hackh's Chemical Dictionary, 5th ed)Electrons: Stable elementary particles having the smallest known negative charge, present in all elements; also called negatrons. Positively charged electrons are called positrons. The numbers, energies and arrangement of electrons around atomic nuclei determine the chemical identities of elements. Beams of electrons are called CATHODE RAYS.Electron Microscope Tomography: A tomographic technique for obtaining 3-dimensional images with transmission electron microscopy.Microscopy, Electron, Scanning Transmission: A type of TRANSMISSION ELECTRON MICROSCOPY in which the object is examined directly by an extremely narrow electron beam scanning the specimen point-by-point and using the reactions of the electrons that are transmitted through the specimen to create the image. It should not be confused with SCANNING ELECTRON MICROSCOPY.Platinum: Platinum. A heavy, soft, whitish metal, resembling tin, atomic number 78, atomic weight 195.09, symbol Pt. (From Dorland, 28th ed) It is used in manufacturing equipment for laboratory and industrial use. It occurs as a black powder (platinum black) and as a spongy substance (spongy platinum) and may have been known in Pliny's time as "alutiae".Nanoparticles: Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging.Metal Nanoparticles: Nanoparticles produced from metals whose uses include biosensors, optics, and catalysts. In biomedical applications the particles frequently involve the noble metals, especially gold and silver.Asbestos: Asbestos. Fibrous incombustible mineral composed of magnesium and calcium silicates with or without other elements. It is relatively inert chemically and used in thermal insulation and fireproofing. Inhalation of dust causes asbestosis and later lung and gastrointestinal neoplasms.Asbestos, Serpentine: A type of asbestos that occurs in nature as the dihydrate of magnesium silicate. It exists in two forms: antigorite, a plated variety, and chrysotile, a fibrous variety. The latter makes up 95% of all asbestos products. (From Merck Index, 11th ed, p.893)Asbestos, Crocidolite: A lavender, acid-resistant asbestos.Asbestos, Amosite: Asbestos, grunerite. A monoclinic amphibole form of asbestos having long fibers and a high iron content. It is used in insulation. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Asbestos, Amphibole: A class of asbestos that includes silicates of magnesium, iron, calcium, and sodium. The fibers are generally brittle and cannot be spun, but are more resistant to chemicals and heat than ASBESTOS, SERPENTINE. (From Hawley's Condensed Chemical Dictionary, 11th ed)Spectroscopy, Electron Energy-Loss: A technique for analysis of the chemical composition of molecules. A substance is bombarded with monochromatic ELECTRONS. Some of the electrons passing through the specimen will lose energy when they ionize inner shell electrons of the atoms in the specimen. The energy loss is element dependent. Analysis of the energy loss spectrum reveals the elemental composition of a specimen. ENERGY-FILTERED TRANSMISSION ELECTRON MICROSCOPY is a type of electron energy loss spectroscopy carried out in electron microscopes specially outfitted to analyze the spectrum of electron energy loss.Textbooks as Topic: Books used in the study of a subject that contain a systematic presentation of the principles and vocabulary of a subject.Microscopy, Energy-Filtering Transmission Electron: An analytical transmission electron microscopy method using an electron microscope fitted with an energy filtering lens. The method is based on the principle that some of the ELECTRONS passing through the specimen will lose energy when they ionize inner shell electrons of the atoms in the specimen. The amount of energy loss is dependent upon the element. Analysis of the energy loss spectrum (ELECTRON ENERGY-LOSS SPECTROSCOPY) reveals the elemental composition of a specimen. It is used analytically and quantitatively to determine which, how much of, and where specific ELEMENTS are in a sample. For example, it is used for elemental mapping of PHOSPHORUS to trace the strands of NUCLEIC ACIDS in nucleoprotein complexes.Diffusion: The tendency of a gas or solute to pass from a point of higher pressure or concentration to a point of lower pressure or concentration and to distribute itself throughout the available space. Diffusion, especially FACILITATED DIFFUSION, is a major mechanism of BIOLOGICAL TRANSPORT.Cranial Fontanelles: Any of six membrane-covered openings between the CRANIAL SUTURES in the incompletely ossified skull of the fetus or newborn infant. The fontanelles normally close sometime after birth.Krypton: A noble gas that is found in the atmosphere. It has the atomic symbol Kr, atomic number 36, atomic weight 83.80, and has been used in electric bulbs.Construction Materials: Supplies used in building.Temperature: The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.Gallstones: Solid crystalline precipitates in the BILIARY TRACT, usually formed in the GALLBLADDER, resulting in the condition of CHOLELITHIASIS. Gallstones, derived from the BILE, consist mainly of calcium, cholesterol, or bilirubin.Calcium Compounds: Inorganic compounds that contain calcium as an integral part of the molecule.Nanowires: Nanometer-scale wires made of materials that conduct electricity. They can be coated with molecules such as antibodies that will bind to proteins and other substances.Gallium: A rare, metallic element designated by the symbol, Ga, atomic number 31, and atomic weight 69.72.Semiconductors: Materials that have a limited and usually variable electrical conductivity. They are particularly useful for the production of solid-state electronic devices.Aluminum: A metallic element that has the atomic number 13, atomic symbol Al, and atomic weight 26.98.High-Throughput Screening Assays: Rapid methods of measuring the effects of an agent in a biological or chemical assay. The assay usually involves some form of automation or a way to conduct multiple assays at the same time using sample arrays.Crystallization: The formation of crystalline substances from solutions or melts. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Crystallography, X-Ray: The study of crystal structure using X-RAY DIFFRACTION techniques. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Calcium Pyrophosphate: An inorganic pyrophosphate which affects calcium metabolism in mammals. Abnormalities in its metabolism occur in some human diseases, notably HYPOPHOSPHATASIA and pseudogout (CHONDROCALCINOSIS).X-Ray Diffraction: The scattering of x-rays by matter, especially crystals, with accompanying variation in intensity due to interference effects. Analysis of the crystal structure of materials is performed by passing x-rays through them and registering the diffraction image of the rays (CRYSTALLOGRAPHY, X-RAY). (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Crystallography: The branch of science that deals with the geometric description of crystals and their internal arrangement. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Models, Molecular: Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.Protein Conformation: The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain).

The role of RBF in the introduction of G1 regulation during Drosophila embryogenesis. (1/10657)

The first appearance of G1 during Drosophila embryogenesis, at cell cycle 17, is accompanied by the down-regulation of E2F-dependent transcription. Mutant alleles of rbf were generated and analyzed to determine the role of RBF in this process. Embryos lacking both maternal and zygotic RBF products show constitutive expression of PCNA and RNR2, two E2F-regulated genes, indicating that RBF is required for their transcriptional repression. Despite the ubiquitous expression of E2F target genes, most epidermal cells enter G1 normally. Rather than pausing in G1 until the appropriate time for cell cycle progression, many of these cells enter an ectopic S-phase. These results indicate that the repression of E2F target genes by RBF is necessary for the maintenance but not the initiation of a G1 phase. The phenotype of RBF-deficient embryos suggests that rbf has a function that is complementary to the roles of dacapo and fizzy-related in the introduction of G1 during Drosophila embryogenesis.  (+info)

The postnatal development of the alimentary canal in the opossum. I. Oesophagus. (2/10657)

The oesophageal epithelium of the newborn opossum generally is two to three cells in depth and in some regions appears pseudostratified. By the 9th postnatal day the epithelium shows two distinct strata. Ciliated cells and occasional goblet cells also are observed within the epithelium during this stage and in subsequent stages. Cilia persist in the oesophagus of the adult opossum, but are restricted to the depths of the transverse folds found in the distal part of the organ. The epithelium covering the transverse folds of the adult likewise has an immature appearance. By 4-5 cm (ca. 20 days), the epithelium has assumed a more mature appearance and is of greater depth. This and later stages show three basic strata: a germinal layer, a spinous layer and, adjacent to the lumen, a flattened layer of cells that retain their nuclei. The epithelium throughout the postnatal period and in the adult does not undergo complete keratinization. The oesophageal glands begin as outgrowths from the epithelium just prior to 4-5 cm (ca. 20 days). The glands continue their development throughout the remainder of the postnatal period. The secretory units of the oesophageal glands of the the major portion of the secretory elements, and a light, rounded cell type which is less numerous and which occupies the terminal portions of the secretory units. Secretory material of the former appears complex, consisting of both neutral and acid glycoproteins. The secretory product of the light cell type is unknown at present. Both cell types are encompassed by myoepithelial cells. The relationship of the mitotic sequences to the observations made by microscopic examination of the developing oesophagus is discussed.  (+info)

Collagen fiber arrangement in canine hepatic venules. (3/10657)

Cell-maceration/scanning electron microscopy, serial sections and scanning electron microscopy of vascular resin casts were employed to demonstrate the arrangement of collagen fibers in the terminal hepatic venules, involving the central, intercalated and collecting veins in dog liver. In cell-maceration specimens, each collagen fiber was observed to run in various directions, forming a sheath with a compact meshwork of collagen fibers. The collagenous meshwork in the hepatic venules was looser than those of the terminal portal venules and hepatic arterioles. Some collagen fibers formed bundles with an elongated spiral arrangement encircling the wall of the terminal hepatic venules. In resin casts, these venules were observed as a twisted configuration caused by spiral collagen bundles. A helical modification of such connective tissue bundles might provide a mechanically stable vascular structure and permit reversible changes in linear and circumferential vascular dimensions at the terminal tributaries of veins. Round or oval pores with diameters of approximately 9 microns were also observed in the sheath of collagen fibers. These pores, together with the relatively loose collagenous meshwork in the hepatic venules, might play a role in lymphocyte migration from these venules into the surrounding tissue and provide high permeability to the venule walls. No such helical configuration and pores were observed in either the portal venules or the hepatic arterioles.  (+info)

Obstructive uropathy and hydronephrosis in male KK-Ay mice: a report of cases. (4/10657)

Uropathy associated with hydronephrosis was observed frequently in our male KK-Ay mouse colony during a long-term study of diabetes. The lesion occurred in 24 of the 31 KK-Ay male mice and accounted for the greatest number of spontaneous deaths among them. It was observed after 4 months of age and involved about hard plugs of altered seminal material resembling the seminal vesicle secretion. The plugs became impacted in the urethral bulb and the bladder. The penile anatomy, with its flexure, pressure on the urethra from the bulbocavernosus muscle, and the characteristic ability of the seminal fluid to easily coagulate to form the vaginal plug may have contributed to the lesion. Correlation between development of the uropathy and diabetes has not been established.  (+info)

Perturbation of mammalian cell division. III. The topography and kinetics of extrusion subdivision. (5/10657)

If mitotic-arrested, cold-stored HeLa cells are incubated at 37 degrees C a proportion of the population divides by an aberrant process which we have called subdivision by extrusion. This process has been studied by time-lapse photography and shown to differ from normal cleavage in several respects. The cell surface becomes more generally mobile and, instead of producing the precisely localized furrowing activity of cytokinesis, gives rise to multiple surface protrusions. These protrusions enlarge at the expense of the parent cell and develop into a cluster of small daughter cells (mini segregants). The surface structure of the cell, as seen by scanning electron microscopy, also changes; the microvilli characteristic of interphase, metaphase and cleaving HeLa cells are lost during extrusion and the cell surface becomes smooth. Extrusion activity is much more variable than division by cleavage in terms of both topography and kinetics, and in general takes longer to complete. Some cells in the cold-treated populations divide by mixtures of cleavage and extrusion or by cleavage alone. The relative numbers of cells dividing in different ways vary with the conditions of pretreatment and incubation of the mitotic cells. The greater the perturbation (e.g. longer cold storage), the greater the proportion of extruding rather than cleaving cells. Human diploid cells can also be induced to subdivide by extrusion. Possible mechanisms underlying the different types of division activity are discussed.  (+info)

Kodamaea nitidulidarum, Candida restingae and Kodamaea anthophila, three new related yeast species from ephemeral flowers. (6/10657)

Three new yeast species were discovered during studies of yeasts associated with ephemeral flowers in Brazil, Australia and Hawaii. Their physiological and morphological similarity to Kodamaea (Pichia) ohmeri suggested a possible relationship to that species, which was confirmed by rDNA sequencing. Kodamaea nitidulidarum and Candida restingae were found in cactus flowers and associated nitidulid beetles in sand dune ecosystems (restinga) of South-eastern Brazil. Over 350 strains of Kodamaea anthophila were isolated from Hibiscus and morning glory flowers (Ipomoea spp.) in Australia, and from associated nitidulid beetles and Drosophila hibisci. A single isolate came from a beach morning glory in Hawaii. Expansion of the genus Kodamaea to three species modified the existing definition of the genus only slightly. The type and isotype strains are as follows: K. nitidulidarum strains UFMG96-272T (h+; CBS 8491T) and UFMG96-394I (h-; CBS 8492I); Candida restingae UFMG96-276T (CBS 8493T); K. anthophila strains UWO(PS)95-602.1T (h+; CBS 8494T), UWO(PS)91-893.2I (h-; CBS 8495I) and UWO(PS)95-725.1I (h-; CBS 8496I).  (+info)

Embryonal feather growth in the chicken. (7/10657)

Prenatal feather growth development in the chicken was studied in 7 body regions in HH stages 27-45, using direct measurements, specific histological and immunohistochemical methods, and scanning electron microscopy. The results from measurements of absolute length values, and, particularly, growth rate development in each HH stage revealed a distinct phase of most intensive growth in HH stage 40-41, which was preceded by feather follicle insertion and accompanied by the occurrence of alpha-keratins in barbule cells. Specific regional evaluation demonstrated that growth in the feather follicles of abdominal skin generally showed the slowest progression from absolute values and that in the feather filaments of the developing wings the most rapid progression occurred during HH stage 40-41 from growth rate values.  (+info)

Activation of G12/G13 results in shape change and Rho/Rho-kinase-mediated myosin light chain phosphorylation in mouse platelets. (8/10657)

Platelets respond to various stimuli with rapid changes in shape followed by aggregation and secretion of their granule contents. Platelets lacking the alpha-subunit of the heterotrimeric G protein Gq do not aggregate and degranulate but still undergo shape change after activation through thromboxane-A2 (TXA2) or thrombin receptors. In contrast to thrombin, the TXA2 mimetic U46619 led to the selective activation of G12 and G13 in Galphaq-deficient platelets indicating that these G proteins mediate TXA2 receptor-induced shape change. TXA2 receptor-mediated activation of G12/G13 resulted in tyrosine phosphorylation of pp72(syk) and stimulation of pp60(c-src) as well as in phosphorylation of myosin light chain (MLC) in Galphaq-deficient platelets. Both MLC phosphorylation and shape change induced through G12/G13 in the absence of Galphaq were inhibited by the C3 exoenzyme from Clostridium botulinum, by the Rho-kinase inhibitor Y-27632 and by cAMP-analogue Sp-5,6-DCl-cBIMPS. These data indicate that G12/G13 couple receptors to tyrosine kinases as well as to the Rho/Rho-kinase-mediated regulation of MLC phosphorylation. We provide evidence that G12/G13-mediated Rho/Rho-kinase-dependent regulation of MLC phosphorylation participates in receptor-induced platelet shape change.  (+info)

A field emission display having an ion pump, for removal of outgassed material, is described. The display has a baseplate and an opposing face plate. A substrate acts as a base for the baseplate. There are parallel, spaced conductors acting as cathode electrodes, over the substrate. An insulating layer covers the cathode electrodes and the substrate, and parallel, spaced conductors act as gate electrodes and overlay the insulating layer. There is a plurality of openings extending through the insulating layer and the gate electrodes. At each of the openings is a field emission microtip connected to and extending up from one of the cathode electrodes. The faceplate has a glass base and is mounted opposite and parallel to the baseplate. A conducting anode electrode covers the glass base. There is a pattern of phosphorescent material over the conducting anode electrode, so that when electrons which are emitted from the field emission microtips strike the pattern of phosphorescent material, light is emitted,
Field electron emission (also known as field emission (FE) and electron field emission) is emission of electrons induced by an electrostatic field. The most common context is field emission from a solid surface into vacuum. However, field emission can take place from solid or liquid surfaces, into vacuum, air, a fluid, or any non-conducting or weakly conducting dielectric. The field-induced promotion of electrons from the valence to conduction band of semiconductors (the Zener effect) can also be regarded as a form of field emission. The terminology is historical because related phenomena of surface photoeffect, thermionic emission (or Richardson-Dushman effect) and "cold electronic emission", i.e. the emission of electrons in strong static (or quasi-static) electric fields, were discovered and studied independently from the 1880s to 1930s. When field emission is used without qualifiers it typically means "cold emission". Field emission in pure metals occurs in high electric fields: the ...
There is provided a field emission type display which is capable of suppressing deterioration of image quality which otherwise occurs due to stepwise cuts and to the increase of wiring resistance caused by a thin width of a cathode line and which causes less failures. The display includes a plurality of cathode lines having an equal line width within the pixel and is structurally based on a multiple gradation representing a scheme of controlling spatial gradation display by changing the number of field emission type emitters to be driven by changing the number of cathode lines to be selected.
Logos Verlag Berlin, Taryl L. Kirk Near Field Emission Scanning Electron Microscopy, Reihe: Applied Electron Microskopy - Angewandte Elektronenmikroskopie, Bd. 9
Home › Tender Notices › Global Notice for Inviting Tender and Tender Documents for procurement of a Focused Ion Beam Field Emission Scanning Electron Microscope FIB-FESEM ...
Conjugated polyelectrolyte nano field emission adlayers. . Biblioteca virtual para leer y descargar libros, documentos, trabajos y tesis universitarias en PDF. Material universiario, documentación y tareas realizadas por universitarios en nuestra biblioteca. Para descargar gratis y para leer online.
merely we discover, that objects carry not this download fowler nordheim field; but Now upon participating their quae, consider with the aspect of transition in those drawn tis, that our individuals are our useless tis, and belong exclusively and so the not-made in all their independent particulars. There are different regions of this download, as we may be its interest on the identity, in a now sure esse. Of these, I shall know the two download fowler nordheim field emission.
High resolution color displays for field emission displays are formed by applying a grille to a screen layer, the grille having a set of holes formed therein exposing areas of the screen layer. A layer of photoresist is applied to the grille and the exposed areas of the screen layer, whereby a plurality of photoresist-covered screen layer areas are defined. One set of the plurality of photoresist-covered screen layer areas is fixed, whereby a fixed set and an unfixed set are defined. The photoresist is removed from the unfixed set and a light emitting substance is deposited on the exposed screen layer area. The fixed set of photoresist is plasma etched.
We report the first observations of field emission/ionisation in liquid helium under pressure. Our preliminary data are presented, and discussed, for pressures, tip potentials and temperatures in the range 0 , P , 25 atm, 0 , V , 3kV, T, 1.5 K.. ...
Looking for interconnecting? Find out information about interconnecting. To attach one device to another. A physical port or wireless port used to attach one device to another Explanation of interconnecting
The first part of this project involves instrumental developments. First, we will demonstrate and characterize laser driven field emission from the customized electron source of a commercial 200kV TEM. The femtosecond cold field emission gun that we have already mounted in a dedicated Ultra High Vacuum (UHV) bench will be completely characterized in terms of brightness, emittance and energy spectrum as a function of laser parameters and extraction voltage. Then, it will be transferred on a TEM column. Its potential for electron microscopy experiments will be thoroughly investigated first on routine TEM applications and later on more demanding experiments. A system allowing light injection and collection on the TEM sample, already installed, will allow us to perform original experiments involving electrons and photons. The principle of an ultrafast TEM is show on the Figure 1. An ultrashort laser pulse excites the sample inserted inside the objective lens. A second laser pulse, delayed, will ...
To create a SEM image a focused primary electron beam scans across a sample surface. Due to the electron bombarding secondary electrons (SE) as well as backscattered electrons (BSE) emit from the sample.. While secondary elecontrons have an energy lower than 50 eV, backscattered electrons show much higher energies.The different electrons are therefore detected by two different, energy selective detectors which convert them into signals, amplifys and visualizes them on a monitor. The result is a tremendously vivid surface image. Since secondary electrons can only be emitted from the surface the resolution of the corresponding image is very good. It ranges between 5 and 10 nm. Backscattered electrons are generated at greater depths. Therefore, the resolution of the corresponding image is significantly lower. SEM have a field depth that is much higher than the one from optical microscopes.. ...
Abstract: It is generally accepted that when multi-component materials are examined with a scanning electron microscope, the contrast differences observed using compositional backscattered electron imaging are due to variations in their average atomic numbers. With increasing atomic number, there is an approximate monotonic increase in backscatter coefficient, which is observed as an increase in the brightness of specimens. However, what seems to be less generally appreciated is that light emitted from cathodoluminescent compounds, especially organic compounds, will also contribute to the brightness in backscattered electron images, and this may result in anomalous compositional contrast. Backscattered electron detectors used with scanning electron microscopes are either a scintillator or a solid state semiconductor and, in addition to detecting high energy backscattered electrons, these detectors also happen to be very sensitive to light. Anomalous contrast had been observed with several ...
The invention is directed to an expandable self-expanding stent for implantation in a body lumen, such as an artery. The stent is made with a plurality of cylindrical elements which are interconnected by a plurality of interconnecting members which connect adjacent cylindrical elements, some of the interconnecting members have one or more bending points formed therein for promoting the bendability of the interconnecting member. The bending point can be formed by reducing the strut wall thickness of the interconnecting member to promote the bending of the strut or it can be formed by reducing the strut width of the interconnecting member, or a combination of both. The bending points on the interconnecting member enhances the bendability and flexibility of the composite stent device by creating mechanical hinges which help to bend the stent as it is delivered through the tortuous anatomy of the patient or conforms to a curved portion of a body vessel, where the stent may be implanted.
The FEI Helios 660 dual-beam microscope combines a monochromated field emission scanning electron microscope (FE-SEM) with an advanced focused ion beam (FIB)
The frequent use of antibiotics against microbial infections may lead the emergence of antibiotic resistant microbial strains. To overcome these microbial strains, we need to fabricate alternative materials which can handle them. It is for this reason, we have fabricated cellulose (CE) based filter paper (FP) composite scaffolds comprising of adsorbed chitosan (CS) and sliver (Ag) nanoparticles (NPs). The AgNPs are incorporated in the CS layer of the composite scaffold. Prior to evaluate the efficacy of the scaffolds against gram positive and gram negative bacterial strains, the scaffolds were characterized for the presence of the Ag NPs with field emission scanning electron microscope (FE-SEM), fourier transform infrared (FTIR) spectroscopy and x-ray diffractometer (XRD ...
The scanning electron microscopy (SEM) image of polyvinylpyrrolidone (PVP) nanofibers electrospun from 15 wt% PVP, 5 wt% wt sucrose in 0.1mg/mL horseradish pero
To enhance our understanding of effects of microbially mediated pyrite dissolution and the influence parameters such as varied metabolism and crystallographic orientation of pyrite surfaces some dissolution experiments were performed. Microbial etching experiments on pyrite surfaces of different orientation, including {111} and {210} were devised. The experiments were performed using two strains ...
In the CrN coating, it can be seen that clear scars were not formed as with the other coatings, instead isolated areas and irregular wear were seen. The dark areas are still coated and the clear areas are where the substrate material has been exposed (figure 8b).. To determine that in some areas the coating was removed it was necessary to test hardness, such as that shown for the steel 4320 with a load of 11.76N (figure 8e), where the wear scar produced by Vickers indentation appears, and whose measurement corresponded to the substrate (700 HV). The SEM micrograph (figure 10c and 10d) shows that wear produced was irregularly shaped in the 4320 steel with a coating of CrN. Figures 10e and 11b show a SEM micrograph and EDS graphic respectively, of 4140 steel with CrN coating, in the first, the clear areas represent removed coating (substrate) and the second shows how the content of Chromium has decreased significantly.. In the WC/C coating, the scar was also produced in a regular form, but ...
Volume I: Principles and Techniques - Provides the foundation for effective use of all particle atlases. It fully describes techniques for particle characterization, handling, and identification and includes detailed presentations of microscope optics, polarized light microscopy, x-ray diffraction camera, and electron and ion microprobes.. Volume II: Light Microscopy Atlas - 711 full-color photomicrographs of 609 particles including complete descriptions in terms of identifying microscopical characteristics. Each particle is also identified morphologically, the vital key to identifying unknown particles with the light microscope.. Volume III: Electron Microscopy Atlas - Shows and describes 1,827 SEM micrographs and EDXRA patterns of the same 609 particles shown in Volume II. This volume details the procedure for the study of samples by both scanning and transmission electron microscopy. This volume includes 27 TEM micrographs and SAED patterns.. Volume IV: The Particle Analysts Handbook - 356 ...
Interconnecting Cisco Network Devices, Part 2 (ICND2) by Stephen McQuerry, 9781587054631, available at Book Depository with free delivery worldwide.
Abstract: A typical dual-beam platform combines a focused ion beam (FIB) microscope with a field emission gun scanning electron microscope (FEGSEM). Using FIB-FEGSEM, it is possible to sequentially mill away > ~ 50 nm sections of a material by FIB and characterize, at high resolution, the crystallographic features of each new surface by electron backscatter diffraction (EBSD). The successive images can be combined to generate 3D crystallographic maps of the microstructure. A useful technique is described for FIB milling that allows the reliable reconstruction of 3D microstructures using EBSD. This serial sectioning technique was used to investigate the recrystallization behaviour of a particle-containing nickel alloy, which revealed a number of features of the recrystallizing grains that are not clearly evident in 2D EBSD micrographs such as clear evidence of particle stimulated nucleation (PSN) and twin formation and growth during PSN ...
Development of docetaxel nanocrystals surface modified with transferrin for tumor targeting Jin-Seok Choi, Jeong-Sook Park College of Pharmacy, Institute of Drug Research and Development, Chungnam National University, Yuseong-gu, Daejeon, South Korea Abstract: The purpose of this study was to develop the surface modification of docetaxel nanocrystals (DTX-NCs) with apo-Transferrin human (Tf) for improving the cellular uptake and cytotoxicity of DTX. DTX-NCs were prepared by a nanoprecipitation method, and the surface modified with Tf by an adsorption method (Tf-DTX-NCs). The morphology and particle size of DTX-NCs and Tf-DTX-NCs were characterized using a field emission scanning electron microscope and zetasizer. An in vitro drug release study was performed in phosphate-buffered saline containing 0.5% (w/v) Tween 80 for 24 hours. Cellular uptake was studied at 0.5, 1, and 2 hours. A cytotoxicity study was performed using the A549 (human lung cancer) cell line after 24-, 48-, and 72-hour
Learn about the newly expanded ZEN technology and new Correlative Microscopy in this interview with John B Yorston, Carl Zeiss. Capabilities of the Sigma VP Field Emission Scanning Electron Microscope are demonstrated and the LSM 700 Scanning Confocal Microscope is shown. These systems combine ultra-resolution with labelling capabilities for a turn-key solution called Shuttle and Find. Filmed by SelectScience at ASCB 2011.
Usually expensive filters and chemicals are used to image bacteria through high resolution scanning electron microscope (Field emission). The substrate developed by this Institute can be used as an ideal, cheap and better substitute of these materials. This technology can be transferred within three months on exclusive basis.. ...
The FEI Quanta 200 ESEM scanning electron microscope is pre-owned and remanufactured to OEM specifications. Click in for more on the scope specs.
SEM images of the fabricated scaffolds (A and B) and the commercial product from BD Bioscience (C). A: HT63, composed the combination of HA and TCP at a 2:1 mas
In one aspect, the invention includes a method of patterning a substrate. A film is formed over a substrate and comprises a plurality of individual molecules. The individual molecules comprise two ends with one of the two ends being directed toward the substrate and the other of the two ends being directed away from the substrate. Particle-adhering groups are bound to said other of the two ends of at least some of the individual molecules and a plurality of particles are adhered to the particle-adhering groups to form a mask over the substrate. The substrate is etched while the mask protects portions of the substrate. In another aspect, the invention encompasses a method of forming a field emission display. A material having a surface of exposed nitrogen-containing groups is formed over the substrate. At least one portion of the material is exposed to radiation while at least one other portion of the material is not exposed. The exposing renders one of the exposed or unexposed portions better at bonding
CHINA SCIENCE AND TECHNOLOGY NEWSLETTER T h e M i n i s t r y o f S c i e n c e a n d T e c h n o l o g y P e o p l e s R e p u b l i c o f C h i n a I N T H I S I S S U E * Six Goals for Space Development * China-Korea Joint Marine Study * China: Largest GEF Recipient * World First GM Cassava * 25-inch VGA Field Emission Display Chinese State Development and Reform Commission an ...
A médiaszakembereknek készített heti eseménynaptár segítségével tájékozódjon az Európai Parlament várható tevékenységeiről.
Gel Serum - All Skin Types - HYDRATION. The Zone Super Smoother is an anti-ageing gel serum, designed to smooth the skins surface, and impart essential moisture into the skin. This formulation boasts a Dual Hyaluronic Action, utilising two different analogues of Hyaluronic Acid for advanced penetration into the skin, which provides unparalleled moisturising capabilities, applying the latest technology in the highest concentrations. Provides immediate and long term ultimate dermal and epidermal moisturisation and plumping but without any oiliness. The serum dries quickly leaving skin feeling tighter, looking smoother.. Super Smoother enhances the action of injectable fillers that are used to plump out wrinkles. A light, cooling Gel Serum formulation that ideally adds a perfect balance of moisture required to feed the dermis and epidermis but without any oily feel. A must for most skins, particularly beneficial for adult acne sufferers as it provides essential moisture but without any oiliness. ...
Scanning Electron Microscopy image of carbon dioxide sequestered in treated serpentine minerals. Crystals shown here are primarily nesquehonite." ...
The present invention describes a patch panel unit including an interface for connecting the patch panel with an electrical node and first and second ports for receiving patch cord connectors. A switch interconnects the first interface with the first and second ports such than when a connector is placed only within the first port, an active connection is provided between the interface and the first port. When a connection is placed within the second port, an active connection is provided between the second port and the first interface despite whether a connection is provided with the first port.
An active switching mechanism is used for diverting paper sheets from a first area (A) to either possible paths (ab or ac). The sheets along the first path (ab) can be directly conveyed to a second area (B), and the sheets along the second path (ac) can be directed through a passive switching mechanism (4) to a third area (C), the direction of the moving sheets being reversed through a reversing mechanism, thereby enabling said sheets to be conveyed in the reverse direction from the third area (C) along a third path (cb) to the second area (B), using a passive switching device (4).
OAK RIDGE, Tenn., Jan. 31, 2019-A new electron microscopy technique that detects the subtle changes in the weight of proteins at the nanoscale-while keeping the sample intact-could open a new pathway for deeper, more comprehensive studies of the basic building blocks of life. ...
Easy to cut and apply, this Weather Strip Tape has a self-adhesive back and is compatible with all types of Silicone Sealants. It will withstand a high level of movement and will conform to irregular surfaces. It resists cracking, is durabble and long-lasting ...
ABSTRACT-In evaluating the effectiveness of consolidants for limestone, difficulty is encountered in the determination of the depth of penetration of consolidants. A simple procedure using iodine vapor for visualizing penetration depth is described. The technique is compared with other methods, such as fluorescent dye indicators, elemental analysis, scanning electron microscopy (SEM) observation, charring in an inert atmosphere, and acid etching, for effectiveness, applicability, and suitability. ...
... rougher, more irregular surfaces. Preparation of samples was performed as described in Materials and
کاهش بازتابش لیزر به عنوان یک پدافند مؤثر برای محافظت از افراد و تجهیزات حساس حایز اهمیت است. مهم‌ترین استراتژی برای کاهش آسیب‌های تابش لیزر، کاهش میزان بازتابش آن از سطوح است. در این تحقیق از روش‌های ایجاد تخلخل در ساختار رنگدانه برای دستیابی به پایین‌ترین درصد بازتابش و ساخت پوشش‌های ضدبازتاب لیزر استفاده شده است. رنگدانه‌های کربنی متخلخل CMK-1 و CMK-3 تهیه شده و با روش‌های XRD، FE-SEM و DR-UV-Vis-NIR ارزیابی شدند. پوشش حاوی این رنگدانه‌ها روی بستر آلومینیمی اعمال شد و خواص عمومی رنگ و طیف بازتابش پراکنده آنها مورد بررسی قرار گرفت. در نهايت میزان بازتابش آن در برابر
230x350 cm., with 2 femoral adhesive fenestrations of 7x5 cm. Two adhesive areas of 16x16 cm., fenestration of 12,5 cm. and opened incise area of 7,5 cm. Ø (fenestration of ø 7x10 cm. for standart). Transparent lateral panels in both sides of patient and both lateral side reinforced zones. Cat. № 16140600 ...
OsteoAnchor is a new type of surface architecture for improving the lifespan for patients of cementless orthopaedic implants, such as hip and knee replacements.. Download Brochure ...
Improved stent configurations exhibiting limited recoil, resistance to compression and improved longitudinal flexibility are disclosed. The stent is comprised of a plurality of annular elements aligned to form a cylindrical stent body. The annular elements are comprised of a plurality of open, generally boomerang-shaped segments interconnected top-to-bottom around each of the annular elements. Adjacent annular elements are interconnected by interconnecting element.
Image Type: SEM Image, Scale Bar: 5um, Magnification: 10000, Etch: No etching, Coating: Au/Pd, Instrument Location: UNM, kV: 15.. ...
Tissues and organs in the body are sometimes damaged to such an extent that they require artificial support to heal. Now, A*STAR researchers have used star-shaped polymers to produce a three-dimensional network that is both compatible with human tissue and facilitates cells to adhere and proliferate under controlled biological conditions.
The healthy brain is made up of millions of interconnecting nerve cells, called neurons. Neurons constantly communicate with each other by sending sig...
Ford totta: M sz ros D vid T ny, hogy a vil gh bor a nacionalizmust - Eur p n k v l s bel l - nem csak kialak totta, hanem akut f zisba hozta. Ez rt teljesen jogosult az az ig ny, hogy ennek az esem nynek a val di jelent startalm t meg rts k. Mit jelent ma a nacionalizmus kult rfiloz fiai r tekint sben? Meggy z d s nk a k vetkez : a modern nacionalizmus tartalmaz k t k l n teoretik j , s t ellent tes, mde gyakran egym ssal kombin lt lehet s get; az egyik ezek k z l a degener ci s visszafejl d s egy form j nak min s l, m g a m sik a magasabb rt kek fel vezet utat s egyszersmind az jj sz let s els l p seit reprezent lja. Az itt k vetkez tanulm ny k s rletet tesz e t bb -kev sb tiszt zatlan ter let kifejt s re s k vetkezm nyeinek felt r s ra. A nacionalizmushoz hasonl jelens gek magyar zata csak egy kritikai rt k t leten alapul t rt nelmi sszk p megalkot sa ut n v lik lehets gess . E k pben ugyanis nyilv nval v lesz a politikai hatalom fokozatos, min s gi rtelemben vett al sz ll sa a hierarchi ban, ...
The 3 principles companies should embrace to make journey from data to insights smoother and maximize their internal and external results. Find out more.
Energy dispersive X-ray spectroscopy (EDS) Wavelength dispersive X-ray spectroscopy (WDS) 1thickness analysis of thin films by energy dispersive x-ray spectroscopy a thesis submitted to the graduate school of natural and applied sciencesFoot District - tu tienda online de zapatillas. La mejor selección de nike, adidas, NB y muchas otras más. Envío Gratis. Entrega al día siguiente.Energy-Dispersive X-Ray Spectroscopy (EDS) John Goodge, University of Minnesota-Duluth. Interaction of an electron beam with a sample target produces a variety of .edsonsemprimer.pdf - Download as . Energy Dispersive Spectroscopy . The probability of absorption then increases again as the X-ray energy approaches the .CHAPTER 16 X-ray Spectroscopy by Manne Siegbahn 16.1.Energy Dispersive X-Ray Spectroscopy (EDS) Detector . State-of the Art Ethernet X ray Electronic interface 10/100 megabits per .High-resolution X-ray emission spectroscopy with transition-edge sensors: . Download Paper . DOI Link. Keywords . X-ray ...
Field emission properties of single wall carbon nanotubes (SWCNTs) grown on iron catalyst film by plasma enhanced chemical vapour deposition system were studied in diode configuration. The results were analysed in the framework of Fowler-Nordheim theory. The grown SWCNTs were found to be excellent field emitters, having emission current density higher than 20 mA/cm{sup 2} at a turn-on field of 1.3 V/μm. The as grown SWCNTs were further treated with Oxygen (O{sub 2}) plasma for 5 min and again field emission characteristics were measured. The O{sub 2} plasma treated SWCNTs have shown dramatic improvement in their field emission properties with emission current density of 111 mA/cm{sup 2} at a much lower turn on field of 0.8 V/μm. The as grown as well as plasma treated SWCNTs were also characterized by various techniques, such as scanning electron microscopy, high resolution transmission electron microscopy, Raman spectroscopy, and Fourier transform infrared spectroscopy before and after O{sub ...
摘要 The a-C and a-C:H films are deposited on silicon surfaces modified with and without nickel nanoparticles by using mid-frequency magnetron sputtering. The microstructures and morphologies of the films are analyzed by Raman spectroscopy and atomic force microscopy. Field emission behaviors of the deposited films with and without nickel nanoparticles modification are comparatively investigated. It is found that the hydrogen-free carbon film exhibits a high field emission current density and low turn-on electric field compared with the hydrogenated carbon film. Nickel modifying could increase the current density, whereas it has no significant effect on the turn-on electric field. The mechanism of field electron emission of a sample is discussed from the surface morphologies of the films and nickel nanoparticle roles in the interface between film and substrate ...
Scanning electron microscopy[edit]. Fly larvae and fly eggs are used to aid in the determination of a PMI. In order for the ... When scanning electron microscopy is not available, a faster, lower cost technique is potassium permanganate staining. The ... A study in 2007 demonstrates a technique that can use scanning electron microscopy (SEM) to identify key morphological features ... "Identification of fly eggs using scanning electron microscopy for forensic investigations". Micron. 39 (7): 802-7. doi:10.1016/ ...
Scanning electron microscopy[edit]. In scanning electron microscopy (SEM), a high-energy electron beam (ranging a few 100 eVs ... Scanning tunneling microscopy[edit]. In scanning tunneling microscopy (STM), a sharp tip scans the surface of a sample in a ... Transmission electron microscopy[edit]. Transmission electron microscopy (TEM) uses electrons to generate high-resolution ... Low-Energy and Photoemission Electron Microscopy[edit]. Low-energy electron microscopy (LEEM) and photoemission electron ...
Scanning Electron Microscopy (4): 1609-1618. PMID 11539690.. *^ Lowe, B. (1997). "The role of Ca2+ in deflection-induced ...
Scanning electron microscopy image of electrospun polycaprolactone fibers.. Photograph of a meniscus of polyvinyl alcohol in ...
The capitulum of Ixodes holocyclus (scanning electron microscopy). The feeding process of Ixodes holocyclus ...
A diamond cuboctahedron showing seven crystallographic planes, imaged with scanning electron microscopy ... characterization methods such as electron microscopy, X-ray diffraction, calorimetry, nuclear microscopy (HEFIB), Rutherford ... This involves methods such as diffraction with X-rays, electrons, or neutrons, and various forms of spectroscopy and chemical ... Due to its higher electron mobility and saturation velocity compared to silicon, it is a material of choice for high-speed ...
1986). Advanced Scanning Electron Microscopy and X-Ray Microanalysis. Plenum Press. ISBN 0-306-42140-2.. .mw-parser-output cite ... Sputter coating in scanning electron microscopy is a sputter deposition process to cover a specimen with a thin layer of ... In a Kaufman source ions are generated by collisions with electrons that are confined by a magnetic field as in a magnetron. ... As the ions leave the source they are neutralized by electrons from a second external filament. IBS has an advantage in that ...
Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS): Uses an electronic beam to scan the surface of a ... Scanning Electron Microscopy with X-ray microanalysis. Retrieved April 19, 2014. National Museums, Liverpool. (n.d.). Scanning ... electron microscopy. Retrieved April 19, 2014. CAMEO. (2014). Chromatography. Retrieved April 19, 2014. CAMEO. (2014).Gas ...
Levi-Setti, R. (1974). "Proton scanning microscopy: feasibility and promise". Scanning Electron Microscopy: 125. W. H. Escovitz ... FIB systems operate in a similar fashion to a scanning electron microscope (SEM) except, rather than a beam of electrons and as ... The same protocol used for preparing samples to transmission electron microscopy can also be used to select a micro area of a ... A FIB setup is a scientific instrument that resembles a scanning electron microscope (SEM). However, while the SEM uses a ...
Typical visual inspection methods are: scanning optical microscopy (SOM), scanning electron microscopy (SEM), pico-second ... "Scanning Electron Microscopy (SEM)". University of Wyoming. Zeng Gong and Marc X. Makkes "Hardware Trojan side-channels based ... Then, the engineer repeatedly scans the surface while grinding the layers of the chip. There are several operations to scan the ... The signature may consist of any number of data outputs from the chip: an entire scan chain or intermediate data result. In a ...
... crystals, imaged with light and with scanning electron microscopy. Depth hoar (also called sugar snow) are large ...
Geissinger HD (2011). "The use of silver nitrate as a stain for scanning electron microscopy of arterial intima and paraffin ... It can be used as a stain in scanning electron microscopy.[14] ...
In Olsen, S.L (ed.) Scanning Electron Microscopy in Archaeology. British Archaeological Reports International Series 452. ... "A Scanning Electron Microscope Study of Archaeological Dental Calculus," pp 372-385. ...
A review', Scanning electron microscopy., , pp. 437-62. The anatomy of the sarcoplasmic reticulum in vertebrate skeletal muscle ...
Raeusch through scanning electron microscopy". Current Science. India: Current Science Association and Indian Academy of ...
... : Pioneer of Scanning Electron Microscopy The Papers of Sir Charles Oatley accessed 2 July 2008 Charles Oatley at ... Rodenburg, J.M. (1997). Electron microscopy and analysis 1997 : proceedings of the Institute of Physics Electron Microscopy and ... Ratinac, Kyle R. (2008). "Great moment 9: Scanning electron microscopy". In Ratinac, Kyle R. 50 great moments : celebrating the ... Hawkes, Peter W. (2004). Advances in imaging and electron physics: Volume 133, Sir Charles Oatley and the Scanning Electron ...
"Automated nanoprobing under scanning electron microscopy". 2013 IEEE International Conference on Robotics and Automation. p. ... Commercially available nanoprobing systems are integrated into either a vacuum-based scanning electron microscope (SEM) or ... Scanning Capacitance, and Electrostatic Force Microscopy images. Conductive AFM provides pico-amp resolution to identify and ... only available in AFM based tools Scanning Capacitance Microscopy (SCM) - only available in AFM based tools Electrostatic Force ...
... is preferred for the sputter coating of specimens for scanning electron microscopy. Argon gas is also commonly used for ... Most of the argon in the Earth's atmosphere was produced by electron capture of long-lived 40. K (40. K + e− → 40. Ar + ν) ... 40Ar, the most abundant isotope of argon, is produced by the decay of 40K with a half-life of 1.25×109 years by electron ... Ar (11.2%) by electron capture or positron emission, and also to stable 40. Ca (88.8%) by beta decay. These properties and ...
Naem, S (2000). "Scanning Electron Microscopy of Adult Gongylonema pulchrum". Journal of Veterinary Medicine. 47 (4): 249-255. ...
Correlation Between Specular and Scanning Electron Microscopy". Archives of Ophthalmology. 102 (6): 921-922. doi:10.1001/ ...
... and Parasites in Clinical Skin Samples Using Scanning Electron Microscopy". In Janecek, Milos; Kral, Robert. Modern Electron ... A 47-year-old man with mucormycosis and electron micrograph of his skin showing sporangia of Mucorales fungi.[5] ... Microscopy in Physical and Life Sciences. InTech. doi:10.5772/61850. ISBN 978-953-51-2252-4.. ...
2003). Scanning Electron Microscopy and X-Ray Microanalysis. New York: Springer. For a quick reference to values of work ... This spacing is called the electron affinity (note that this has a different meaning than the electron affinity of chemistry); ... electrochemical potential of electrons) inside the material. The term −eϕ is the energy of an electron at rest in the vacuum ... electrons out of a hot material (called the 'emitter') into the vacuum. If these electrons are absorbed by another, cooler ...
"Scanning electron microscopy of the zonule of Zinn". Albrecht von Graefes Archiv für klinische und experimentelle ...
13, John Wiley & Sons, ISBN 089573-263-7 Reimer, Ludwig (1993). Image Formation in Low-voltage Scanning Electron Microscopy. ... LaB6 and CeB6 are thermionic emitters, used, for example, in scanning electron microscopes. Dodecaborides, LnB12, are formed by ... is often explained by the poor shielding of the 5s and 5p electrons by the 4f electrons. The electronic structure of the ... 4f electrons have a high probability of being found close to the nucleus and are thus strongly affected as the nuclear charge ...
Morphology is understood by Scanning electron microscopy (SEM). Finally, porosity, in some meaning surface area, is measured by ...
Electron beam tomography. Targets. *Coronary *Calcium scan. *CT angiography. *Abdominal and pelvic CT *Virtual colonoscopy ...
Semiconductor film appearance and morphology can be studied with Atomic Force Microscopy (AFM) and Scanning Electron Microscopy ... But when their constituent molecules have π-conjugate systems, electrons can move via π-electron cloud overlaps. Polycyclic ... Typical carriers in organic semiconductors are holes and electrons in π-electrons. Almost all organic solids are insulators. ... This type of semiconductor is also obtained by pairing an electron donor molecule and an electron acceptor molecule. History ...
Serial block-face scanning electron microscopy (SBEM, SBSEM or SBFSEM) is a method to generate high resolution three- ... "Serial block-face scanning electron microscopy" - news · newspapers · books · scholar · JSTOR (August 2010) (Learn how and when ... Denk W, Horstmann H (2004) Serial Block-Face Scanning Electron Microscopy to Reconstruct Three-Dimensional Tissue Nanostructure ... block-face scanning electron microscope consists of an ultramicrotome mounted inside the vacuum chamber of a scanning electron ...
More recently, the application of scanning electron microscopy in the biological sciences has enjoyed something of a ... A new age in scanning electron microscopy: Applications in the life sciences (PDF, 12 MB) ... Sponsored Collection , A new age in scanning electron microscopy: Applications in the life sciences ... Sponsored Collection , A new age in scanning electron microscopy: Applications in the life sciences ...
1972 the proceedings of the Workshop on Biological Specimen Preparation for Scanning Electron Microscopy. ... for 1971 includes the proceedings of the Workshop on Forensic Applications of the Scanning Electron Microscope; ... Scanning Electron Micro Scanning Electron Microscope SCANNING ELECTRON MICROSCOPY/1968 scanning microscope secondary electron ... Electron_Microscopy.html?id=h_5pAAAAMAAJ&utm_source=gb-gplus-shareScanning Electron Microscopy. ...
"Progress in aberration-corrected scanning transmission electron microscopy" (PDF). J. Electron Microsc. 50 (3): 177. doi: ... "Optimizing the environment for sub-0.2 nm scanning transmission electron microscopy". J. Electron. Microsc. 50 (3): 219-226. ... "High Dynamic Range Pixel Array Detector for Scanning Transmission Electron Microscopy". Microscopy and Microanalysis. 22 (1): ... Scanning transmission electron microscopy has been applied to characterize the structure of a wide range of material specimens ...
The Inspect F50 is a Field Emission gun based High Resolution Scanning Electron Microscope (FESEM). The facility is jointly ...
Serial-Section-Scanning-Electron-Microscopy-(S3EM)-on-Silicon-Wafers-for-Ultra-Structural-Volume-pone.0035172.s002.ogv 5.7 s, ... Serial-Section-Scanning-Electron-Microscopy-(S3EM)-on-Silicon-Wafers-for-Ultra-Structural-Volume-pone.0035172.s003.ogv 3.4 s, ... Media in category "Scanning electron microscopy". The following 200 files are in this category, out of 238 total. ... Ion-Abrasion-Scanning-Electron-Microscopy-Reveals-Surface-Connected-Tubular-Conduits-in-HIV-ppat.1000591.s007.ogv 6.7 s, 1,280 ...
The JEOL 6510 LV Scanning Electron Microscope is equipped with a secondary electron detector and backscatter detector for high ... The JEOL 6510 LV Scanning Electron Microscope is equipped with a secondary electron detector and backscatter detector for high ... Electron Microscopy Gallery. Below are images taken by our research laboratories using our JSM 6510LV demonstrating the use of ... the secondary electron and back scatter electron detectors at high vacuum, as well as flash freezing specimens with the Jeol ...
Scanning electron microscopy 1971 by Scanning Electron Microscope Symposium (4th 1971 Chicago); 1 edition; First published in ... Scanning electron microscopy 1971 proceedings of the: part 1 (April 27-29, 1971) Fourth Annual Scanning Electron Microscope ... Scanning Electron Microscope Symposium (4th 1971 Chicago) ,title = Scanning electron microscopy 1971 ,publication-date = 1971 ... Are you sure you want to remove Scanning electron microscopy 1971 from your list? ...
... and how scanning electron microscopy is used at the Conservation Centre, Liverpool. Part of the National Museums Liverpool. ... Information about how a scanning electron microscope (SEM) works, ... Scanning electron microscopy A conservation scientist examining a sample using a scanning electron microscope ... The scanning electron microscope (SEM) produces detailed images at a higher magnification than a light microscope. We use the ...
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... insulating samples to be imaged under an electron beam. The resolution afforded by this technique... ... Environmental scanning electron microscopy (ESEM) (1) is an imaging technique which allows hydrated, ... Philips Electron Optics (1996) Environmental scanning electron microscopy: an introduction to ESEM. Robert Johnson Associates, ... Tai SSW, Tang XM (2001) Manipulating biological samples for environmental scanning electron microscopy observation. Scanning 23 ...
Factors governing photographic image quality in the scanning electron microscope are discussed with particular reference to the ... Source: Journal of Microscopy, Volume 103, Number 1, 1 January 1975, pp. 79-87(9) ...
... This video was recorded at Kolokviji na Institutu ... Scanning Transmission Electron Microscopy: Applications in Materials Science is categorized in the following disciplines: * ... If you know the author of Scanning Transmission Electron Microscopy: Applications in Materials Science, please help us out by ... This video was recorded at Kolokviji na Institutu "Jožef Stefan". Various Scanning Transmission Electron Microscopy (STEM) ...
... of a time-honored text provides the reader with a comprehensive introduction to the field of scanning electron microscopy (SEM ... Variable Pressure Scanning Electron Microscopy (VPSEM) Joseph I. Goldstein, Dale E. Newbury, Joseph R. Michael, Nicholas W. M. ... Attempting Electron-Excited X-Ray Microanalysis in the Variable Pressure Scanning Electron Microscope (VPSEM) ... Scanning Electron Microscope (SEM) Instrumentation Joseph I. Goldstein, Dale E. Newbury, Joseph R. Michael, Nicholas W. M. ...
Scanning Electron Microscopy and X-Ray Microanalysis. Authors: Goldstein, J.I., Newbury, D.E., Michael, J.R., Ritchie, N.W.M., ... Attempting Electron-Excited X-Ray Microanalysis in the Variable Pressure Scanning Electron Microscope (VPSEM) ... Covers Helium ion scanning microscopy. *Organized into relatively self-contained modules - no need to "read it all" to ... Covers Helium ion scanning microscopy. *Organized into relatively self-contained modules - no need to "read it all" to ...
Scanning Electron Microscopy and X-ray Microanalysis. June 3-7, 2019. Cost: $3,550 (Early bird rate: $3,200)*. Course ... This course is designed for individuals who use scanning electron microscopy and x-ray microanalysis in academic, governmental ... Each registrant receives the textbook, Scanning Electron Microscopy and X-ray Microanalysis, 4th edition, Kluwer/Springer ...
Scanning electron microscopy of the surface coat of Blastocystis hominis.. Zaman V1, Howe J, Ng M, Goh TK. ... Scanning electron microscopy of Blastocystis hominis showed that its outer coat has a fibrillar structure and individual ...
... Magnification , EDS/WDS/EPMA/XPS , Resolution , Performance Testing. Magnification ... PELCO® NiOx Test Specimen for Analytical Electron Microscopy (AEM). Planotec GSR & Particle Analysis Calibration Kit. ... Back Scattered Electron Test Specimens. JN-1 SEM Demonstration Specimens. PELCO® Astigmatism Corrector. ...
Scanning Electron Microscopy of the Organ of Corti. By Göran Bredberg, Henrik H. Lindeman, Harlow W. Ades, Roger West, Hans ... Scanning Electron Microscopy of the Organ of Corti. By Göran Bredberg, Henrik H. Lindeman, Harlow W. Ades, Roger West, Hans ... With the scanning electron microscope we have examined normal cochlear sensory epithelium of the guinea pig and cat and that ...
Scanning Electron Microscopy of Vascular Casts by P. Motta, 9780792312970, available at Book Depository with free delivery ... Scanning Electron Microscopy of Vascular Casts : Methods and Applications. *Hardback. * Electron Microscopy in Biology and ... Scanning Electron Microscopy of Vascular Casts: Methods and Applications was planned to supply fundamental and new information ... Since its development by Murakami, the corrosion cast method for scanning electron microscopy has come to be considered one of ...
... The Modultafeln have a pure informational character. The ... subject properties Scanning Probe and Electron Microscopy in major Master Werkstoffwissenschaft 2011 ATTENTION: not offered ... Reimer, l.: Scanning Electron Microscopy; 2.. Auflage, Springer Verlag 2008. - Reimer, L; Pfefferkorn, G.: Raster- ... Slayter, E.: Light and electron microscopy,. Cambridge Univ. Press 1992. - Schäfer; Terlecki: Halbleiterprüfung, Hüthig- ...
Advances in scanning electron microscopy are taking this technology to the next level, driving research and opening new and ... A new age in scanning electron microscopy: Applications in the life sciences. 5 December 2017 ... More recently, the application of scanning electron microscopy in the biological sciences has enjoyed something of a ... The basic design and concept of the electron microscope has not changed much since its development in the 1930s, although ...
... scanning probe, and scanning optical microscopies. Areas of specific interest include all aspects of the instrumentation ... associated with scanning microscopies, correlative microscopy techniques, stereometry, stereology, analytic techniques, and ... and interdisciplinary medium for the rapid exchange of information among all scientists interested in scanning electron, ... The Role of Scanning Electron Microscopy in the Direct Diagnosis of Onychomycosis. Xueping Yue,1 Aiping Wang,2 and Qing Li1 ...
Improved ultrastructural preservation of yeast cells for scanning electron microscopy.. Hanschke R1, Schauer F. ... The processing of yeast cells for scanning electron microscopy by conventional sequential fixation with glutaraldehyde and ...
  • In particular, atomically resolved SCEM images have already been obtained The sample is illuminated by a focussed electron beam, and the beam is re-focussed on the detector, thus collecting only electrons passing through the focus. (wikipedia.org)
  • The main method used to minimize the risk of infection is the use of extremely low numbers of cells-for microscopy only very small numbers of individual cells are required. (springer.com)
  • Since synapses are small structures, they can only be analyzed using electron microscopy (EM), and thus, the three-dimensional organization of synaptic connections requires electron microscopic examination in order to reveal the design of the local neural circuit. (frontiersin.org)
  • This study was designed to observe osteoclasts in the rat femora by light and electron microscopic cytochemistry for nicotinamide adenine dinucleotide phosphatase (NADPase) and arylsulfatase, and scanning electron microscopy using osmium maceration to assess the three-dimensional morphology of the Golgi apparatus in osteoclasts. (americanelements.com)
  • Light sheet fluorescence microscopy (LSFM) with its unique illumination principle allows fast and gentle imaging of whole living model organisms, tissues, and developing cells. (zeiss.com)
  • Conductive modes of atomic force microscopy are widely used to characterize the electronic properties of materials, and in such measurements, contact size is typically determined from current flow. (americanelements.com)
  • To create a SEM image a focused primary electron beam scans across a sample surface. (hzdr.de)
  • Here, the FE properties, in accordance with the tip-sample separation, will be emphasized, since the variations in SE yield are directly proportional to the impinging primary electron beam. (logos-verlag.de)
  • Here, we describe how three dimensional (3D) reconstruction analysis from the serial block-face scanning electron microscopy (SBFSEM) can be used to gain insights on the morphological and volumetric analysis of this critical energy generating organelle. (jove.com)
  • WITec and ZEISS are providing a fully integrated instrument available as an OEM product through ZEISS that features a standard, unmodified vacuum chamber and scanning electron microscope column along with a complete confocal Raman microscope and spectrometer. (photonics.com)