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.
Extraction of the FETUS by means of abdominal HYSTEROTOMY.
Thinly cut sections of frozen tissue specimens prepared with a cryostat or freezing microtome.
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.
The technique of using a microtome to cut thin or ultrathin sections of tissues embedded in a supporting substance. The microtome is an instrument that hold a steel, glass or diamond knife in clamps at an angle to the blocks of prepared tissues, which it cuts in sections of equal thickness.
The marking of biological material with a dye or other reagent for the purpose of identifying and quantitating components of tissues, cells or their extracts.
Preparation for electron microscopy of minute replicas of exposed surfaces of the cell which have been ruptured in the frozen state. The specimen is frozen, then cleaved under high vacuum at the same temperature. The exposed surface is shadowed with carbon and platinum and coated with carbon to obtain a carbon replica.
Electron microscopy in which the ELECTRONS or their reaction products that pass down through the specimen are imaged below the plane of the specimen.
Tungsten hydroxide oxide phosphate. A white or slightly yellowish-green, slightly efflorescent crystal or crystalline powder. It is used as a reagent for alkaloids and many other nitrogen bases, for phenols, albumin, peptone, amino acids, uric acid, urea, blood, and carbohydrates. (From Merck Index, 11th ed)
Methods of preparing tissue for examination and study of the origin, structure, function, or pathology.
An organization of cells into an organ-like structure. Organoids can be generated in culture. They are also found in certain neoplasms.
A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.
A representation, generally small in scale, to show the structure, construction, or appearance of something. (From Random House Unabridged Dictionary, 2d ed)
A form of interference microscopy in which variations of the refracting index in the object are converted into variations of intensity in the image. This is achieved by the action of a phase plate.
A large, subclass of arachnids comprising the MITES and TICKS, including parasites of plants, animals, and humans, as well as several important disease vectors.
Electron microscopy involving rapid freezing of the samples. The imaging of frozen-hydrated molecules and organelles permits the best possible resolution closest to the living state, free of chemical fixatives or stains.
Study of intracellular distribution of chemicals, reaction sites, enzymes, etc., by means of staining reactions, radioactive isotope uptake, selective metal distribution in electron microscopy, or other methods.
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)
The study of the structure, behavior, growth, reproduction, and pathology of cells; and the function and chemistry of cellular components.
The species Oryctolagus cuniculus, in the family Leporidae, order LAGOMORPHA. Rabbits are born in burrows, furless, and with eyes and ears closed. In contrast with HARES, rabbits have 22 chromosome pairs.
Liquids transforming into solids by the removal of heat.
Histochemical localization of immunoreactive substances using labeled antibodies as reagents.
The technique of washing tissue specimens with a concentrated solution of a heavy metal salt and letting it dry. The specimen will be covered with a very thin layer of the metal salt, being excluded in areas where an adsorbed macromolecule is present. The macromolecules allow electrons from the beam of an electron microscope to pass much more readily than the heavy metal; thus, a reversed or negative image of the molecule is created.
The lipid- and protein-containing, selectively permeable membrane that surrounds the cytoplasm in prokaryotic and eukaryotic cells.
Uranium. A radioactive element of the actinide series of metals. It has an atomic symbol U, atomic number 92, and atomic weight 238.03. U-235 is used as the fissionable fuel in nuclear weapons and as fuel in nuclear power reactors.
Photography of objects viewed under a microscope using ordinary photographic methods.
The outermost layer of a cell in most PLANTS; BACTERIA; FUNGI; and ALGAE. The cell wall is usually a rigid structure that lies external to the CELL MEMBRANE, and provides a protective barrier against physical or chemical agents.
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)
Analysis based on the mathematical function first formulated by Jean-Baptiste-Joseph Fourier in 1807. The function, known as the Fourier transform, describes the sinusoidal pattern of any fluctuating pattern in the physical world in terms of its amplitude and its phase. It has broad applications in biomedicine, e.g., analysis of the x-ray crystallography data pivotal in identifying the double helical nature of DNA and in analysis of other molecules, including viruses, and the modified back-projection algorithm universally used in computerized tomography imaging, etc. (From Segen, The Dictionary of Modern Medicine, 1992)
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.
A replica technique in which cells are frozen to a very low temperature and cracked with a knife blade to expose the interior surfaces of the cells or cell membranes. The cracked cell surfaces are then freeze-dried to expose their constituents. The surfaces are now ready for shadowing to be viewed using an electron microscope. This method differs from freeze-fracturing in that no cryoprotectant is used and, thus, allows for the sublimation of water during the freeze-drying process to etch the surfaces.
Compounds and molecular complexes that consist of very large numbers of atoms and are generally over 500 kDa in size. In biological systems macromolecular substances usually can be visualized using ELECTRON MICROSCOPY and are distinguished from ORGANELLES by the lack of a membrane structure.
Contractile tissue that produces movement in animals.
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 diversion of RADIATION (thermal, electromagnetic, or nuclear) from its original path as a result of interactions or collisions with atoms, molecules, or larger particles in the atmosphere or other media. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Separation of particles according to density by employing a gradient of varying densities. At equilibrium each particle settles in the gradient at a point equal to its density. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Agents employed in the preparation of histologic or pathologic specimens for the purpose of maintaining the existing form and structure of all of the constituent elements. Great numbers of different agents are used; some are also decalcifying and hardening agents. They must quickly kill and coagulate living tissue.
The part of a cell that contains the CYTOSOL and small structures excluding the CELL NUCLEUS; MITOCHONDRIA; and large VACUOLES. (Glick, Glossary of Biochemistry and Molecular Biology, 1990)
A variety of anesthetic methods such as EPIDURAL ANESTHESIA used to control the pain of childbirth.
The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.
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.
Centrifugation with a centrifuge that develops centrifugal fields of more than 100,000 times gravity. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.
Test for tissue antigen using either a direct method, by conjugation of antibody with fluorescent dye (FLUORESCENT ANTIBODY TECHNIQUE, DIRECT) or an indirect method, by formation of antigen-antibody complex which is then labeled with fluorescein-conjugated anti-immunoglobulin antibody (FLUORESCENT ANTIBODY TECHNIQUE, INDIRECT). The tissue is then examined by fluorescence microscopy.
The sum of the weight of all the atoms in a molecule.
Direct contact of a cell with a neighboring cell. Most such junctions are too small to be resolved by light microscopy, but they can be visualized by conventional or freeze-fracture electron microscopy, both of which show that the interacting CELL MEMBRANE and often the underlying CYTOPLASM and the intervening EXTRACELLULAR SPACE are highly specialized in these regions. (From Alberts et al., Molecular Biology of the Cell, 2d ed, p792)
Condensed areas of cellular material that may be bounded by a membrane.
Filamentous proteins that are the main constituent of the thin filaments of muscle fibers. The filaments (known also as filamentous or F-actin) can be dissociated into their globular subunits; each subunit is composed of a single polypeptide 375 amino acids long. This is known as globular or G-actin. In conjunction with MYOSINS, actin is responsible for the contraction and relaxation of muscle.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
Elements of limited time intervals, contributing to particular results or situations.
Microscopy in which the samples are first stained immunocytochemically and then examined using an electron microscope. Immunoelectron microscopy is used extensively in diagnostic virology as part of very sensitive immunoassays.
A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc.
The network of filaments, tubules, and interconnecting filamentous bridges which give shape, structure, and organization to the cytoplasm.
The formation of crystalline substances from solutions or melts. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
The making of a radiograph of an object or tissue by recording on a photographic plate the radiation emitted by radioactive material within the object. (Dorland, 27th ed)
Microscopy of specimens stained with fluorescent dye (usually fluorescein isothiocyanate) or of naturally fluorescent materials, which emit light when exposed to ultraviolet or blue light. Immunofluorescence microscopy utilizes antibodies that are labeled with fluorescent dye.
Extraction of the fetus by abdominal hysterotomy anytime following a previous cesarean.
Proteins found in any species of bacterium.
A vegetative stage in the life cycle of sporozoan protozoa. It is characteristic of members of the phyla APICOMPLEXA and MICROSPORIDIA.
Viruses whose hosts are bacterial cells.
A light microscopic technique in which only a small spot is illuminated and observed at a time. An image is constructed through point-by-point scanning of the field in this manner. Light sources may be conventional or laser, and fluorescence or transmitted observations are possible.
Characteristics or attributes of the outer boundaries of objects, including molecules.
Electrophoresis in which a polyacrylamide gel is used as the diffusion medium.
The reproductive elements of lower organisms, such as BACTERIA; FUNGI; and cryptogamic plants.
Within a eukaryotic cell, a membrane-limited body which contains chromosomes and one or more nucleoli (CELL NUCLEOLUS). The nuclear membrane consists of a double unit-type membrane which is perforated by a number of pores; the outermost membrane is continuous with the ENDOPLASMIC RETICULUM. A cell may contain more than one nucleus. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)
One of the protein CROSS-LINKING REAGENTS that is used as a disinfectant for sterilization of heat-sensitive equipment and as a laboratory reagent, especially as a fixative.
Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.
Specific particles of membrane-bound organized living substances present in eukaryotic cells, such as the MITOCHONDRIA; the GOLGI APPARATUS; ENDOPLASMIC RETICULUM; LYSOSOMES; PLASTIDS; and VACUOLES.
Semiautonomous, self-reproducing organelles that occur in the cytoplasm of all cells of most, but not all, eukaryotes. Each mitochondrion is surrounded by a double limiting membrane. The inner membrane is highly invaginated, and its projections are called cristae. Mitochondria are the sites of the reactions of oxidative phosphorylation, which result in the formation of ATP. They contain distinctive RIBOSOMES, transfer RNAs (RNA, TRANSFER); AMINO ACYL T RNA SYNTHETASES; and elongation and termination factors. Mitochondria depend upon genes within the nucleus of the cells in which they reside for many essential messenger RNAs (RNA, MESSENGER). Mitochondria are believed to have arisen from aerobic bacteria that established a symbiotic relationship with primitive protoeukaryotes. (King & Stansfield, A Dictionary of Genetics, 4th ed)
The science and application of a double-beam transmission interference microscope in which the illuminating light beam is split into two paths. One beam passes through the specimen while the other beam reflects off a reference mirror before joining and interfering with the other. The observed optical path difference between the two beams can be measured and used to discriminate minute differences in thickness and refraction of non-stained transparent specimens, such as living cells in culture.
Tissue that supports and binds other tissues. It consists of CONNECTIVE TISSUE CELLS embedded in a large amount of EXTRACELLULAR MATRIX.
Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor.
The long cylindrical contractile organelles of STRIATED MUSCLE cells composed of ACTIN FILAMENTS; MYOSIN filaments; and other proteins organized in arrays of repeating units called SARCOMERES .
Method of tissue preparation in which the tissue specimen is frozen and then dehydrated at low temperature in a high vacuum. This method is also used for dehydrating pharmaceutical and food products.
The outer protein protective shell of a virus, which protects the viral nucleic acid.
Nerve fibers that are capable of rapidly conducting impulses away from the neuron cell body.
A polypeptide substance comprising about one third of the total protein in mammalian organisms. It is the main constituent of SKIN; CONNECTIVE TISSUE; and the organic substance of bones (BONE AND BONES) and teeth (TOOTH).
Techniques to partition various components of the cell into SUBCELLULAR FRACTIONS.
The number of CELLS of a specific kind, usually measured per unit volume or area of sample.
Rupture of bacterial cells due to mechanical force, chemical action, or the lytic growth of BACTERIOPHAGES.
Any spaces or cavities within a cell. They may function in digestion, storage, secretion, or excretion.
The hard portion of the tooth surrounding the pulp, covered by enamel on the crown and cementum on the root, which is harder and denser than bone but softer than enamel, and is thus readily abraded when left unprotected. (From Jablonski, Dictionary of Dentistry, 1992)
A mixture of solid hydrocarbons obtained from petroleum. It has a wide range of uses including as a stiffening agent in ointments, as a lubricant, and as a topical anti-inflammatory. It is also commonly used as an embedding material in histology.
Slender, cylindrical filaments found in the cytoskeleton of plant and animal cells. They are composed of the protein TUBULIN and are influenced by TUBULIN MODULATORS.
An order of the class Amphibia, which includes several families of frogs and toads. They are characterized by well developed hind limbs adapted for jumping, fused head and trunk and webbed toes. The term "toad" is ambiguous and is properly applied only to the family Bufonidae.
Process of using a rotating machine to generate centrifugal force to separate substances of different densities, remove moisture, or simulate gravitational effects. It employs a large motor-driven apparatus with a long arm, at the end of which human and animal subjects, biological specimens, or equipment can be revolved and rotated at various speeds to study gravitational effects. (From Websters, 10th ed; McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A genus of gram-negative, aerobic bacteria found in soil and water. Its organisms occur singly, in pairs or irregular clumps, and sometimes in chains of varying lengths.
Critical and exhaustive investigation or experimentation, having for its aim the discovery of new facts and their correct interpretation, the revision of accepted conclusions, theories, or laws in the light of newly discovered facts, or the practical application of such new or revised conclusions, theories, or laws. (Webster, 3d ed)
The art, technique, or business of producing motion pictures for entertainment, propaganda, or instruction.
The infiltrating of tissue specimens with paraffin, as a supporting substance, to prepare for sectioning with a microtome.
Adherent debris produced when cutting the enamel or dentin in cavity preparation. It is about 1 micron thick and its composition reflects the underlying dentin, although different quantities and qualities of smear layer can be produced by the various instrumentation techniques. Its function is presumed to be protective, as it lowers dentin permeability. However, it masks the underlying dentin and interferes with attempts to bond dental material to the dentin.
The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.
Immunologic techniques based on the use of: (1) enzyme-antibody conjugates; (2) enzyme-antigen conjugates; (3) antienzyme antibody followed by its homologous enzyme; or (4) enzyme-antienzyme complexes. These are used histologically for visualizing or labeling tissue specimens.
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.
Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others.
One or more layers of EPITHELIAL CELLS, supported by the basal lamina, which covers the inner or outer surfaces of the body.
A genus of facultatively anaerobic heterotrophic archaea, in the order THERMOPLASMALES, isolated from self-heating coal refuse piles and acid hot springs. They are thermophilic and can grow both with and without sulfur.
A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances.
Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.
A yellow metallic element with the atomic symbol Au, atomic number 79, and atomic weight 197. It is used in jewelry, goldplating of other metals, as currency, and in dental restoration. Many of its clinical applications, such as ANTIRHEUMATIC AGENTS, are in the form of its salts.
The rate dynamics in chemical or physical systems.
One of the three domains of life (the others being BACTERIA and ARCHAEA), also called Eukarya. These are organisms whose cells are enclosed in membranes and possess a nucleus. They comprise almost all multicellular and many unicellular organisms, and are traditionally divided into groups (sometimes called kingdoms) including ANIMALS; PLANTS; FUNGI; and various algae and other taxa that were previously part of the old kingdom Protista.
The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)
Thin layers of tissue which cover parts of the body, separate adjacent cavities, or connect adjacent structures.
Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding.
A series of steps taken in order to conduct research.
A genus of ameboid protozoa. Characteristics include a vesicular nucleus and the formation of several lodopodia, one of which is dominant at a given time. Reproduction occurs asexually by binary fission.
The transparent anterior portion of the fibrous coat of the eye consisting of five layers: stratified squamous CORNEAL EPITHELIUM; BOWMAN MEMBRANE; CORNEAL STROMA; DESCEMET MEMBRANE; and mesenchymal CORNEAL ENDOTHELIUM. It serves as the first refracting medium of the eye. It is structurally continuous with the SCLERA, avascular, receiving its nourishment by permeation through spaces between the lamellae, and is innervated by the ophthalmic division of the TRIGEMINAL NERVE via the ciliary nerves and those of the surrounding conjunctiva which together form plexuses. (Cline et al., Dictionary of Visual Science, 4th ed)
Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations.
A diverse superfamily of proteins that function as translocating proteins. They share the common characteristics of being able to bind ACTINS and hydrolyze MgATP. Myosins generally consist of heavy chains which are involved in locomotion, and light chains which are involved in regulation. Within the structure of myosin heavy chain are three domains: the head, the neck and the tail. The head region of the heavy chain contains the actin binding domain and MgATPase domain which provides energy for locomotion. The neck region is involved in binding the light-chains. The tail region provides the anchoring point that maintains the position of the heavy chain. The superfamily of myosins is organized into structural classes based upon the type and arrangement of the subunits they contain.
Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA).
A property of the surface of an object that makes it stick to another surface.
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.
Presence of warmth or heat or a temperature notably higher than an accustomed norm.
The minute vessels that connect the arterioles and venules.
Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA.
The physical characteristics and processes of biological systems.
The developmental entity of a fertilized chicken egg (ZYGOTE). The developmental process begins about 24 h before the egg is laid at the BLASTODISC, a small whitish spot on the surface of the EGG YOLK. After 21 days of incubation, the embryo is fully developed before hatching.
The technique of placing cells or tissue in a supporting medium so that thin sections can be cut using a microtome. The medium can be paraffin wax (PARAFFIN EMBEDDING) or plastics (PLASTIC EMBEDDING) such as epoxy resins.
Methods of preparing cells or tissues for examination and study of their origin, structure, function, or pathology. The methods include preservation, fixation, sectioning, staining, replica, or other technique to allow for viewing using a microscope.
The resistance that a gaseous or liquid system offers to flow when it is subjected to shear stress. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
A type of climate characterized by insufficient moisture to support appreciable plant life. It is a climate of extreme aridity, usually of extreme heat, and of negligible rainfall. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Any liquid or solid preparation made specifically for the growth, storage, or transport of microorganisms or other types of cells. The variety of media that exist allow for the culturing of specific microorganisms and cell types, such as differential media, selective media, test media, and defined media. Solid media consist of liquid media that have been solidified with an agent such as AGAR or GELATIN.
A darkly stained mat-like EXTRACELLULAR MATRIX (ECM) that separates cell layers, such as EPITHELIUM from ENDOTHELIUM or a layer of CONNECTIVE TISSUE. The ECM layer that supports an overlying EPITHELIUM or ENDOTHELIUM is called basal lamina. Basement membrane (BM) can be formed by the fusion of either two adjacent basal laminae or a basal lamina with an adjacent reticular lamina of connective tissue. BM, composed mainly of TYPE IV COLLAGEN; glycoprotein LAMININ; and PROTEOGLYCAN, provides barriers as well as channels between interacting cell layers.
A whiplike motility appendage present on the surface cells. Prokaryote flagella are composed of a protein called FLAGELLIN. Bacteria can have a single flagellum, a tuft at one pole, or multiple flagella covering the entire surface. In eukaryotes, flagella are threadlike protoplasmic extensions used to propel flagellates and sperm. Flagella have the same basic structure as CILIA but are longer in proportion to the cell bearing them and present in much smaller numbers. (From King & Stansfield, A Dictionary of Genetics, 4th ed)
The study of PHYSICAL PHENOMENA and PHYSICAL PROCESSES as applied to living things.
That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.
Proteins which are found in membranes including cellular and intracellular membranes. They consist of two types, peripheral and integral proteins. They include most membrane-associated enzymes, antigenic proteins, transport proteins, and drug, hormone, and lectin receptors.
A chelating agent that sequesters a variety of polyvalent cations such as CALCIUM. It is used in pharmaceutical manufacturing and as a food additive.
A division of organisms that exist vegetatively as complex mobile plasmodia, reproduce by means of spores, and have complex life cycles. They are now classed as protozoa but formerly were considered fungi.
The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species.
Specialized junctions at which a neuron communicates with a target cell. At classical synapses, a neuron's presynaptic terminal releases a chemical transmitter stored in synaptic vesicles which diffuses across a narrow synaptic cleft and activates receptors on the postsynaptic membrane of the target cell. The target may be a dendrite, cell body, or axon of another neuron, or a specialized region of a muscle or secretory cell. Neurons may also communicate via direct electrical coupling with ELECTRICAL SYNAPSES. Several other non-synaptic chemical or electric signal transmitting processes occur via extracellular mediated interactions.
A basic enzyme that is present in saliva, tears, egg white, and many animal fluids. It functions as an antibacterial agent. The enzyme catalyzes the hydrolysis of 1,4-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in peptidoglycan and between N-acetyl-D-glucosamine residues in chitodextrin. EC 3.2.1.17.
The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH = log 1/2[1/(H+)], where (H+) is the hydrogen ion concentration in gram equivalents per liter of solution. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
The technique of using FIXATIVES in the preparation of cytologic, histologic, or pathologic specimens for the purpose of maintaining the existing form and structure of all the constituent elements.
A generic term for any circumscribed mass of foreign (e.g., lead or viruses) or metabolically inactive materials (e.g., ceroid or MALLORY BODIES), within the cytoplasm or nucleus of a cell. Inclusion bodies are in cells infected with certain filtrable viruses, observed especially in nerve, epithelial, or endothelial cells. (Stedman, 25th ed)
Relating to the size of solids.
The 2nd cranial nerve which conveys visual information from the RETINA to the brain. The nerve carries the axons of the RETINAL GANGLION CELLS which sort at the OPTIC CHIASM and continue via the OPTIC TRACTS to the brain. The largest projection is to the lateral geniculate nuclei; other targets include the SUPERIOR COLLICULI and the SUPRACHIASMATIC NUCLEI. Though known as the second cranial nerve, it is considered part of the CENTRAL NERVOUS SYSTEM.
Physicochemical property of fimbriated (FIMBRIAE, BACTERIAL) and non-fimbriated bacteria of attaching to cells, tissue, and nonbiological surfaces. It is a factor in bacterial colonization and pathogenicity.
Antibodies produced by a single clone of cells.
A malpresentation of the FETUS at near term or during OBSTETRIC LABOR with the fetal cephalic pole in the fundus of the UTERUS. There are three types of breech: the complete breech with flexed hips and knees; the incomplete breech with one or both hips partially or fully extended; the frank breech with flexed hips and extended knees.
Established cell cultures that have the potential to propagate indefinitely.
A subfield of acoustics dealing in the radio frequency range higher than acoustic SOUND waves (approximately above 20 kilohertz). Ultrasonic radiation is used therapeutically (DIATHERMY and ULTRASONIC THERAPY) to generate HEAT and to selectively destroy tissues. It is also used in diagnostics, for example, ULTRASONOGRAPHY; ECHOENCEPHALOGRAPHY; and ECHOCARDIOGRAPHY, to visually display echoes received from irradiated tissues.
The infective system of a virus, composed of the viral genome, a protein core, and a protein coat called a capsid, which may be naked or enclosed in a lipoprotein envelope called the peplos.
The ten-layered nervous tissue membrane of the eye. It is continuous with the OPTIC NERVE and receives images of external objects and transmits visual impulses to the brain. Its outer surface is in contact with the CHOROID and the inner surface with the VITREOUS BODY. The outer-most layer is pigmented, whereas the inner nine layers are transparent.
Methods of maintaining or growing biological materials in controlled laboratory conditions. These include the cultures of CELLS; TISSUES; organs; or embryo in vitro. Both animal and plant tissues may be cultured by a variety of methods. Cultures may derive from normal or abnormal tissues, and consist of a single cell type or mixed cell types.
A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the Sprague-Dawley Animal Company.
Heat and stain resistant, metabolically inactive bodies formed within the vegetative cells of bacteria of the genera Bacillus and Clostridium.
Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).
Deoxyribonucleic acid that makes up the genetic material of bacteria.
The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.
The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM.
Lipids containing one or more phosphate groups, particularly those derived from either glycerol (phosphoglycerides see GLYCEROPHOSPHOLIPIDS) or sphingosine (SPHINGOLIPIDS). They are polar lipids that are of great importance for the structure and function of cell membranes and are the most abundant of membrane lipids, although not stored in large amounts in the system.
The technique of using a cryostat or freezing microtome, in which the temperature is regulated to -20 degrees Celsius, to cut ultrathin frozen sections for microscopic (usually, electron microscopic) examination.
The deductive study of shape, quantity, and dependence. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Polymers synthesized by living organisms. They play a role in the formation of macromolecular structures and are synthesized via the covalent linkage of biological molecules, especially AMINO ACIDS; NUCLEOTIDES; and CARBOHYDRATES.
The lipid-rich sheath surrounding AXONS in both the CENTRAL NERVOUS SYSTEMS and PERIPHERAL NERVOUS SYSTEM. The myelin sheath is an electrical insulator and allows faster and more energetically efficient conduction of impulses. The sheath is formed by the cell membranes of glial cells (SCHWANN CELLS in the peripheral and OLIGODENDROGLIA in the central nervous system). Deterioration of the sheath in DEMYELINATING DISEASES is a serious clinical problem.
Linear POLYPEPTIDES that are synthesized on RIBOSOMES and may be further modified, crosslinked, cleaved, or assembled into complex proteins with several subunits. The specific sequence of AMINO ACIDS determines the shape the polypeptide will take, during PROTEIN FOLDING, and the function of the protein.
Controlled operation of an apparatus, process, or system by mechanical or electronic devices that take the place of human organs of observation, effort, and decision. (From Webster's Collegiate Dictionary, 1993)
Parts of the myosin molecule resulting from cleavage by proteolytic enzymes (PAPAIN; TRYPSIN; or CHYMOTRYPSIN) at well-localized regions. Study of these isolated fragments helps to delineate the functional roles of different parts of myosin. Two of the most common subfragments are myosin S-1 and myosin S-2. S-1 contains the heads of the heavy chains plus the light chains and S-2 contains part of the double-stranded, alpha-helical, heavy chain tail (myosin rod).
The adhesion of gases, liquids, or dissolved solids onto a surface. It includes adsorptive phenomena of bacteria and viruses onto surfaces as well. ABSORPTION into the substance may follow but not necessarily.
A spectroscopic technique in which a range of wavelengths is presented simultaneously with an interferometer and the spectrum is mathematically derived from the pattern thus obtained.
Red blood cells. Mature erythrocytes are non-nucleated, biconcave disks containing HEMOGLOBIN whose function is to transport OXYGEN.
The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)
A nonreducing disaccharide composed of GLUCOSE and FRUCTOSE linked via their anomeric carbons. It is obtained commercially from SUGARCANE, sugar beet (BETA VULGARIS), and other plants and used extensively as a food and a sweetener.
A group of cold-blooded, aquatic vertebrates having gills, fins, a cartilaginous or bony endoskeleton, and elongated bodies covered with scales.
The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.
Tendency of fluids (e.g., water) to move from the less concentrated to the more concentrated side of a semipermeable membrane.
The development of anatomical structures to create the form of a single- or multi-cell organism. Morphogenesis provides form changes of a part, parts, or the whole organism.
Fibers composed of MICROFILAMENT PROTEINS, which are predominately ACTIN. They are the smallest of the cytoskeletal filaments.
The development and use of techniques to study physical phenomena and construct structures in the nanoscale size range or smaller.
Multicomponent ribonucleoprotein structures found in the CYTOPLASM of all cells, and in MITOCHONDRIA, and PLASTIDS. They function in PROTEIN BIOSYNTHESIS via GENETIC TRANSLATION.
The fission of a CELL. It includes CYTOKINESIS, when the CYTOPLASM of a cell is divided, and CELL NUCLEUS DIVISION.
Chromatography on non-ionic gels without regard to the mechanism of solute discrimination.
A generic term for fats and lipoids, the alcohol-ether-soluble constituents of protoplasm, which are insoluble in water. They comprise the fats, fatty oils, essential oils, waxes, phospholipids, glycolipids, sulfolipids, aminolipids, chromolipids (lipochromes), and fatty acids. (Grant & Hackh's Chemical Dictionary, 5th ed)
Artificial, single or multilaminar vesicles (made from lecithins or other lipids) that are used for the delivery of a variety of biological molecules or molecular complexes to cells, for example, drug delivery and gene transfer. They are also used to study membranes and membrane proteins.
Mature male germ cells derived from SPERMATIDS. As spermatids move toward the lumen of the SEMINIFEROUS TUBULES, they undergo extensive structural changes including the loss of cytoplasm, condensation of CHROMATIN into the SPERM HEAD, formation of the ACROSOME cap, the SPERM MIDPIECE and the SPERM TAIL that provides motility.
Body organ that filters blood for the secretion of URINE and that regulates ion concentrations.
The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments.
The concentration of osmotically active particles in solution expressed in terms of osmoles of solute per liter of solution. Osmolality is expressed in terms of osmoles of solute per kilogram of solvent.
Deoxyribonucleic acid that makes up the genetic material of viruses.
A protein derived from FIBRINOGEN in the presence of THROMBIN, which forms part of the blood clot.
Naturally occurring or experimentally induced animal diseases with pathological processes sufficiently similar to those of human diseases. They are used as study models for human diseases.
The protein constituents of muscle, the major ones being ACTINS and MYOSINS. More than a dozen accessory proteins exist including TROPONIN; TROPOMYOSIN; and DYSTROPHIN.
A type of scanning probe microscopy in which a probe systematically rides across the surface of a sample being scanned in a raster pattern. The vertical position is recorded as a spring attached to the probe rises and falls in response to peaks and valleys on the surface. These deflections produce a topographic map of the sample.
A basic element found in nearly all organized tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes.
A stack of flattened vesicles that functions in posttranslational processing and sorting of proteins, receiving them from the rough ENDOPLASMIC RETICULUM and directing them to secretory vesicles, LYSOSOMES, or the CELL MEMBRANE. The movement of proteins takes place by transfer vesicles that bud off from the rough endoplasmic reticulum or Golgi apparatus and fuse with the Golgi, lysosomes or cell membrane. (From Glick, Glossary of Biochemistry and Molecular Biology, 1990)
RNA sequences that serve as templates for protein synthesis. Bacterial mRNAs are generally primary transcripts in that they do not require post-transcriptional processing. Eukaryotic mRNA is synthesized in the nucleus and must be exported to the cytoplasm for translation. Most eukaryotic mRNAs have a sequence of polyadenylic acid at the 3' end, referred to as the poly(A) tail. The function of this tail is not known for certain, but it may play a role in the export of mature mRNA from the nucleus as well as in helping stabilize some mRNA molecules by retarding their degradation in the cytoplasm.
Cells that line the inner and outer surfaces of the body by forming cellular layers (EPITHELIUM) or masses. Epithelial cells lining the SKIN; the MOUTH; the NOSE; and the ANAL CANAL derive from ectoderm; those lining the RESPIRATORY SYSTEM and the DIGESTIVE SYSTEM derive from endoderm; others (CARDIOVASCULAR SYSTEM and LYMPHATIC SYSTEM) derive from mesoderm. Epithelial cells can be classified mainly by cell shape and function into squamous, glandular and transitional epithelial cells.
Proteins found in any species of virus.
Thin structures that encapsulate subcellular structures or ORGANELLES in EUKARYOTIC CELLS. They include a variety of membranes associated with the CELL NUCLEUS; the MITOCHONDRIA; the GOLGI APPARATUS; the ENDOPLASMIC RETICULUM; LYSOSOMES; PLASTIDS; and VACUOLES.
A ubiquitous sodium salt that is commonly used to season food.
The outer covering of the body that protects it from the environment. It is composed of the DERMIS and the EPIDERMIS.
A highly variable species of the family Ranidae in Canada, the United States and Central America. It is the most widely used Anuran in biomedical research.
Procedure in which an anesthetic is injected directly into the spinal cord.
Colloids with a solid continuous phase and liquid as the dispersed phase; gels may be unstable when, due to temperature or other cause, the solid phase liquefies; the resulting colloid is called a sol.
A dye obtained from the heartwood of logwood (Haematoxylon campechianum Linn., Leguminosae) used as a stain in microscopy and in the manufacture of ink.
Condition of having pores or open spaces. This often refers to bones, bone implants, or bone cements, but can refer to the porous state of any solid substance.
Organic compounds that generally contain an amino (-NH2) and a carboxyl (-COOH) group. Twenty alpha-amino acids are the subunits which are polymerized to form proteins.
Agents that emit light after excitation by light. The wave length of the emitted light is usually longer than that of the incident light. Fluorochromes are substances that cause fluorescence in other substances, i.e., dyes used to mark or label other compounds with fluorescent tags.
Micrograph showing chorionic villi. Very high magnification. H&E stain. Section through the embryo. Transverse section of a ... Micrograph showing chorionic villi. Intermediate magnification. H&E stain. ...
Horizontal section. Lipoma Trabectedin "Orphanet: Myxoid/round cell liposarcoma". Orpha.net. Retrieved October 27, 2019. Sung; ... Micrograph of myxoid liposarcoma. H&E stain MRI of myxoid liposarcoma of high grade, in left axillary region of 40 year old man ...
Micrograph of fatty liver showing lipid steatosis. H&E stain. On X-ray computed tomography (CT), the increased fat component ... Histological section of a mouse's liver showing severe steatosis. The clear vacuoles contained lipid in life; however, ...
Micrograph cross section of an equine vibrissa. Macrovibrissae of a tiger. Laboratory mouse (C57BL/6) showing macrovibrissae. ...
Micrograph of the rete testis involved by seminoma. H&E stain. Tubular ectasia of the rete testis Definition: Rete ovarii from ... English uses the New Latin name for the structure, which simply means "network of the testis". Vertical section of the testis, ...
Micrographs of wood sections of Ascarina philippinensis. ...
Sections of the colon are: The ascending colon including the cecum and appendix The transverse colon including the colic ... Micrograph of normal large instestinal crypts. Anatomy of normal large intestinal crypts The colon crypts are shaped like ... The ascending colon is the first of four main sections of the large intestine. It is connected to the small intestine by a ... In the four tissue sections shown here, many of the intestinal glands have cells with a mitochondrial DNA mutation in the CCOI ...
High resolution micrograph of human brain, coronal section through the hippocampus. Diagram of hippocampal regions in a rat ...
Micrograph showing the hypoglossal nuclei in relation to their surrounding structures. Micrograph showing the hypoglossal ... Hypoglossal nerve Transverse section of medulla oblongata below the middle of the olive. Nuclei of origin of cranial motor ...
Micrograph of cerebellar hemangioblastoma. HPS stain. Micrograph of cerebellar hemangioblastoma. HPS stain. von Hippel-Lindau ... Although they can occur in any section of the central nervous system, they usually occur in either side of the cerebellum, the ...
C. Coloured transmission electron micrograph (TEM) of a tangential section through a fibroblast cell. The internal structure ... Toluidine blue stained Semithin Epon sections of jejunum mucosa showing the bottom of Lieberkuhn glands in transverse section ... frequently only 2-3 telopodes are observed on a single section, depending on site and angle of section, since their 3D ... Scanning electron micrograph of monkey left ventricular myocardium. A typical TC is located across the cardiomyocytes, in close ...
Micrograph of pinworms in the appendix, H&E stain High magnification micrograph of a pinworm in cross section in the appendix, ... H&E stain Pinworms are sometimes diagnosed incidentally by pathology: Micrograph of male pinworm in cross section, alae (blue ... H&E stain Partially longitudinal cross-section of enterobius vermicularis, H&E stain Cross-section of early enterobius ... This micrograph reveals the cephalic alae in the head region of E. vermicularis. E. vermicularis The entire life cycle, from ...
Silimanite crystal from Sri Lanka Fibrolite micrograph List of minerals List of minerals named after people "WebMineral entry ... so named because the mineral appears like a bunch of fibres twisted together when viewed in thin section or even by the naked ... Atlas of rock-forming minerals in thin section. Essex: Longman Scientific & Technical. p. 10. ISBN 0-582-45591-X. Whitney, D.L ...
But the first micrograph of the internal side of a cell dates back to 1977 by M.V. Nermut. Professor John Heuser made ... The first observation the bi-layer cell membrane was made in 1959 on a section of a cell using the electron microscope. ...
Some darts have a round cross section, others are bladed or vaned. In some cases the blades on the sides of the dart are ... Note: both the scanning electron micrographs (SEMs) and the drawings below are taken from, or modified from, Koene & ... The upper images show a lateral view, where the scale bar is 500 μm (= 0.5 mm). The lower images show a cross-section, where ... The drawings show first the cross section, and then the lateral view, of the dart in that particular species. Darts vary in ...
Electron micrographs in the early stage of infection suggest that virus replication occurs in the cytoplasm within a viroplasm ... Suttle and Chan (1995) counted more than 320 viruses in an ultrathin section of an infection cell. Estimates for burst sizes ... In this study, ultrathin sections of viruses within Chyrsochromulina brevifilum were prepared and viewed using transmission ...
This section needs additional citations for verification. Please help improve this article by adding citations to reliable ... Micrograph showing the visual cortex (pink). The pia mater and arachnoid mater including blood vessels are seen at the top of ... Dorsal and ventral V3 have distinct connections with other parts of the brain, appear different in sections stained with a ...
Cross section of a Chlamydomonas reinhardtii algae cell, a 3D representation. Light micrograph of Chlamydomonas without ...
Micrographs of the crimped connections can be prepared to illustrate good and bad crimps for training and quality assurance ... The assembled connection is cut in cross-section, polished and washed in nitric acid to dissolve any copper dust that may be ... "Cross Sectioning". Archived from the original on 2017-06-20. "Tensile Test". Archived from the original on 2017-12-01. Wire ... the joint is mechanically stronger Crimped connections can be used for cables of both small and large cross-sections, whereas ...
Electron micrograph sections show they have a thin outer endospore coat, a thick spore cortex, and an inner spore membrane ...
machine: evaluation of fluorescence micrographs". Computers in Biology and Medicine. 33 (1): 31-43. CiteSeerX 10.1.1.324.4664. ... Detection of 2000 Cell Surface Protein Clusters in a Single Tissue Section and Cell Type Specific Annotation by Using a Three ... biomolecules in fixed cells or tissue sections). This results in the transmission of a randomly large number of distinct ... "Combined multi-gene analysis at the RNA and protein levels in single FFPE tissue sections". Experimental and Molecular ...
C: Transverse section same.. Scanning electron micrograph of a pitcher's inner surface ...
This section does not cite any sources. Please help improve this section by adding citations to reliable sources. Unsourced ... A low magnification SEM micrograph of an advanced ceramic material. The properties of ceramics make fracturing an important ... Currently, even blades made of advanced metal alloys used in the engines' hot section require cooling and careful limiting of ...
Micrograph of an H&E stained section of a peripheral PNET.. Blue nevus ... Micrograph of a small-cell carcinoma showing cells with nuclear moulding, minimal amount of cytoplasm and stippled chromatin. ... Micrograph showing the yolk sac component of a mixed germ cell tumour. H&E stain. ...
Hybrid image showing an optical micrograph of part of a mouse kidney cross-section (gray), overlaid with the distribution of an ... Histology cross-sections of the tissue shown on the left. Early optoacoustic imaging involved scanning a single ultrasound ...
The periodical section has more than 2,500 journals and newspapers in Persian, Arabic, Turkish, and Urdu, as well as a number ... micrographs, etc. Technical Service Center: the center for the selection, ordering, registering, preparing, and cataloging of ... Also in this section are catalogers and bibliographers maintaining a written list of manuscripts in the library, having ...
Cross section of a human liver, taken at autopsy examination, showing multiple large pale tumor deposits. The tumor is an ... decrease Carcinoembryonic antigen for colorectal secondaries Ultrasound scan CT scan Biopsy under ultrasound control Micrograph ...
... or with a hexagonal cross section and some are barbed. Wattendorf (1976) suggested that all circular sectioned raphides, as ... Electron micrographs have shown that raphide needle crystals are normally four sided or H-shaped (with a groove down both sides ... visible in a light microscope, are probably hexagonal in cross section The hexagonal crystals reported by Wattendorf in Agave ...
Fine expanded PTFE fiber with round cross section and smooth outer surface are obtained by twisting flat stretched filaments ... The micrographs shown in FIG. 1 illustrate 2 conditions: * * (A) The final fiber with twisting smaller than optimum twisting ... One of the basic objectives of the instant invention is achieved by the fact that the PTFE fiber is given a round cross section ... 2. A fiber according to claim 1, wherein said cross section presents a diameter ranging from 33 to 410 μm. 3. A fiber according ...
This thin-section transmission electron micrograph (TEM) reveals a single virus particle, or virion, of measles virus. (CDC.gov ...
Cover: Light micrograph of part of a thinly sliced section through a strawberry. Photograph: Eye of Science/Science Photo ...
The fracture sections of both polymers were conducting enough to need no coating to be examined by SEM. This is indicative of a ... In these micrographs the white patches correspond to graphene in the fracture surface of the polymer matrix. ...
Section 3 discusses both devices and benchmarks all different types of modulators and switches presented in Section 2. Finally ... p-SiGe is selectively grown on a Si waveguide and the crystal defects are barely shown in the Transmission Electron Micrograph ... Figure 5. (a) Cross-section of an InGaAsP/Si hybrid MOS optical phase shifter demonstrated by J. Han et al. [61], and (b) of ... Figure 5. (a) Cross-section of an InGaAsP/Si hybrid MOS optical phase shifter demonstrated by J. Han et al. [61], and (b) of ...
... elegans using a series of electron micrographs. The authors then combined these with previously published micrographs to ... Previous studies have described the connectomes for sections of the male C. elegans and the nervous system of the hermaphrodite ... They note that their connectomes should be considered conceptualizations as they were constructed from micrographs of multiple ...
... polarized light micrograph. The black vertical lines are multiseriate rays, which are composed of several rows of cells. The ... Elm stem (Ulmus procera) section, polarized light micrograph. The black vertical lines are multiseriate rays, which are ...
Figure 7. Double-walled carbon nanotube bundle cross-section micrograph and model *Figure 8. Schematic of a vertically aligned ...
... biomedical illustration color image no people breast science illustration technique human body part biology cross section human ...
These micrographs were analyzed by point counting using a Zeiss MOP 3 Digital Image Analyzer. The results indicated no ... Ultrathin sections from the alveolar lung were prepared and conventionally processed for TEM and randomly photographed to ... Ultrathin sections from the alveolar lung were prepared and conventionally processed for TEM and randomly photographed to ... These micrographs were analyzed by point counting using a Zeiss MOP 3 Digital Image Analyzer. The results indicated no ...
In Section 4, the N+ ion beam was used to alter the sp2 bonded carbon networks and incorporate N atoms into the surface and sub ... Figure 2(b)-(d) show the low and high magnification plane-view SE micrographs of periodic features induced on the thin film ... In Section 3, RTA was used to easily modify the top 100 nm of a polycrystalline diamond thin film surface into a surface with a ... In this section, the diamond thin film surface modified using rapid thermal annealing (RTA) (i.e., without any metal ...
Roman slag (thin section). Light micrograph Barwel meteorite, light micrograph, 1990s. Covellite. ...
Watermilfoil myriophyllum sp stal transversal cross-section. Medical Images collection features curated Rights-Managed and ... cross-section, crystal, crystals, green, image, inside, life science, light, light micrograph, magnification, micrograph, ... Polarized light micrograph of Watermilfoil (Myriophyllum sp.) stalk transversal cross-section. The image shows a central part ... transversal cross section, plant cells, vascular bundles, sclerenchyma, polarized, many cells ...
Sections indicated is benicar a beta blocker or ace inhibitor in blue. Ben-Shem A, Garreau de Loubresse N, Jenner L, Yusupova G ... CTFFIND4: fast and accurate defocus estimation from electron micrographs. Brown A, Baird MR, Yip MC, Murray J, Shao S. ... The complete ribosome is shown (left) next to a core-region cross-section (middle). D) The final focused refined map (EMD-11437 ... CTFFIND4: fast and accurate defocus estimation from electron micrographs. C in wooden cages with metal grids and provided ...
So that micrograph stitching is an important technology to produce a panorama or larger image by ... ... In material research, it is often highly desirable to observe images of whole microscopic sections with high resolution. ...
Light Micrograph. "This image shows a section of the liver of a mouse bearing a metastatic mammary tumor. At the center of the ...
Section 2== Include some current research, with a second image.,br>,br> ==Conclusion== Overall text length should be at least ... Electron micrograph of the Ebola Zaire virus. This was the first photo ever taken of the virus, on 10/13/1976. By Dr. F.A. ... The topic must include one section about microbes (bacteria, viruses, fungi, or protists). This is easy because all organisms ... Include at least 5 references under Reference section.,br>,br> ==References== ,references /> ,br>Edited by [Author Name], ...
Next, selected regions were trimmed for ultrathin sectioning. Ultrathin sections were collected on copper grids, stained with ... Transmission electron micrograph at original magnification (×20 000). In some cases the Engipore particles are surrounded by a ... Transmission electron micrograph at original magnification (×20 000). In some cases the Engipore particles are surrounded by a ... Transmission electron micrograph. At this original magnification (×2000) it is possible to visualize the particle of Engipore ...
Internally extruded trichocysts also seen in this micrograph. TEM taken on 1/12/73 by R. Allen with Hitachi HU11A operating at ... Microtome sections prepared at approximately 75nm thickness. Additional information available at (http://www5.pbrc.hawaii.edu/ ... Septa of the alveolar sac system and septal pores are seen in this micrograph. ...
... scanning electron micrograph (SEM). Shown here is a section through a pear fruit revealing a cluster of sclereids, also known ... Section through a pear fruit revealing a sclereid, also known as a stone cell. Sclereids are variously shaped sclerenchyma ... Shown here is a section through a pear fruit revealing a cluster of sclereids, also known as stone cells. This research was ... In pear fruit ) in length and are thus named fiberlike sclereids )! ) connecting the sclereids in olive leaves section B, ...
Figure 3. Soybean nodule cross-section micrograph showing individual bacteroids.. (Louisa Howard, Dartmouth College; used with ... For insecticides registered in soybean, please consult the soybean section of the latest version of the NDSU Extension "North ... First, determine the pounds of seed to plant as calculated in the planting rate section of this publication. Then (1) determine ... Treatments also can be based on the average defoliation (see Estimating Defoliation Damage section near the beginning of Insect ...
Suppose you observe a micrograph of a leaf cross section and are asked to determine which side is covered by the upper ... Cross Section Of Dicot Leaf Leaves Blog Wallpaper Cross Section . Photo about Cross-section Dicot, Monocot and Root of Plant ... Dianthus leaf cross section of leaf winter jasmine leaf cross section of dicot leaf cross section of winter... Chloroplasts, a ... Leaf Cross Section Microscope. Cross section of dicot leaf Things under a microscope. Mar 19, 2017 - Find Cross Sections ...
The micrograph of green leaf with breathing cells stomata. 3. Micrograph of green leaf with breathing cells stomata. save. ... Apply a layer of clear nail polish to a dime-sized section of the underside of the leaf. Slice fern leaf under a microscope, ( ... Micrograph of green leaf with breathing cells stomata. Be the first to share what you think! Use scissors to cut the glue into ... Purpose: Micrograph of green leaf with breathing cells stomata. The picture shows us the stomata and with that we are able to ...
Light micrograph of a section through the midrib (vein) of a leaf from a sycamore (Acer pseudoplatanus) tree. In the center of ... Light micrograph of a section through the midrib (vein) of a leaf from a sycamore (Acer pseudoplatanus) tree. In the center of ...
Record ID1799DescriptionMicrograph transverse section Angophora hispida leaf. A stoma is evident in. the epidermis; the ... xerophyte.Record typemicrographPersistent Identifierhttp://hdl.handle.net/102.100.100/1624 ...
11) Electron micrograph cross-section of ovary (arrowheads: basal lamina). Germ cells of the four stages of maturation are ... 11) Electron micrograph cross-section of ovary (arrowheads: basal lamina). Germ cells of the four stages of maturation are ... Sections on copper grids were stained with uranyl acetate and lead citrate [41]. Sections on gold grids were stained with ... 8) Electron micrograph of a vitelline cell at the fourth stage of maturation filled with shell globule clusters and lipid ...
In cross section, the tongue of a bird has a rather triangular shape, conforming the shape of the lower beak. The entoglossal ... At the micrograph above, the entoglossal bone is still cartilaginous. ... Cross section of the mid-region of the tongue of a young pigeon (HE) ...
a) (top) Scanning electron micrograph image of As2S3 planar waveguide cross-section and (lower) device schematic. (b) Principle ... a) (top) Scanning electron micrograph image of As2S3 planar waveguide cross-section and (lower) device schematic. (b) Principle ...
e) Cross-section of the Sc vein. Scale bar: 500 µm. (f) Laser scan of Sc vein and tympanal membrane depicting displacement at ... b) Light micrograph of right tympanal membrane. Scale bar: 200 µm. (c) Forewing showing enlarged subcostal (Sc) vein, as well ... Inset: Scanning electron micrograph of the opening connecting the tympanal chamber and Sc vein. Scale bar of inset: 100 µm. ...
... dark round structures in micrograph) are formed by the fungus. These are masses of thick-walled mycelium that allow the fungus ... greyVascular discoloration in cross sections of maple branches.Microsclerotia ( ... Vascular discoloration in cross sections of maple branches.. Microsclerotia (dark round structures in micrograph) are formed by ...
  • Another honored image, a scanning electron micrograph of a greenfly eye, looks almost like a ballooning mouth of a frog. (livescience.com)
  • Scanning electron micrograph of two bacteriophages. (newswise.com)
  • Fig. C shows a scanning electron micrograph cross-section throuh the rostrum at the point of the arrow in Fig. B. Note the spaces, fluid-filled in life, that give the rostrum its cartilage-like consistency. (tolweb.org)
  • C - Scanning electron micrograph of a cross-section of the rostrum. (tolweb.org)
  • The microstructure probed by scanning electron micrograph reveals almost homogeneously distributed particles having random shape with some porosity. (scirp.org)
  • Scanning electron micrographs show the cross sections of three fibers. (photonics.com)
  • Insert: cross-section of actual structure, represented as rescaled scanning electron micrograph. (umd.edu)
  • Scanning electron micrograph of polished section of ruthenium nugget with isoferroplatinum inclusions. (webmineral.com)
  • Most earlier studies have employed electron microscopy of thin or thick sections of cells. (nih.gov)
  • We have analyzed ultrathin sections from isolated bovine chromaffin cells grown on plastic support, after fast freezing, by quantitative electron microscopy. (rupress.org)
  • Our main service is providing electron microscopy micrographs for patient diagnosis. (washington.edu)
  • Cross sectioned striated muscle fibers of the heart myocardium. (shutterstock.com)
  • Spatially resolved infrared (IR) and Raman images are acquired from human hair cross sections or intact hair fibers. (spiedigitallibrary.org)
  • Thin-section transmission electron micrograph (TEM). (cdc.gov)
  • A thin-section transmission electron micrograph showing two HIV virus particles. (telegraph.co.uk)
  • Transmission electron micrograph of a thin section of Chlorobaculum tepidum strain TLST. (eol.org)
  • Coloured transmission electron micrograph of a section through a cluster of corona viruses. (gettyimages.com)
  • C ) Transmission electron micrographs of BM neutrophils from whole BM sections. (jci.org)
  • Reconstruction of the centrosome cycle from cryoelectron micrographs. (nih.gov)
  • Right panels show 3D reconstruction ortho-view micrographs of representative cells. (nih.gov)
  • analysis and reconstruction of serial section electron micrographs. (springer.com)
  • As heavy metal-contrasted plastic-embedded samples are less sensitive to the overall dose rather than the electron dose rate, an optimal resampling of the reconstruction space can be achieved by accumulating lower dose electron micrographs of the same area over a wider range of specimen orientations. (nih.gov)
  • Left: Superposition of a confocal fluorescence microscopy image and a TEM montage (480 images recorded at 15.000x magnification) acquired from immune-labelled ultrathin sectioned human iPS cells. (mpg.de)
  • Representative images of neutrophils (top) (original magnification, ×3,500) and a section from the image (bottom) (original magnification, ×6,500). (jci.org)
  • Transverse section of a chorionic villus. (wikipedia.org)
  • Micrographs of transverse sections through phloem tissue. (els.net)
  • 2005, J Struct Biol) for automated data collection on ultrathin-sections. (mpg.de)
  • Light micrograph of a section through a bamboo cane (diameter 2cm) used for gardening. (sciencephoto.com)
  • Light micrograph of a section through a normal human eye, showing the junction between the light- sensitive, multi-layered retina and its supporting choroid layer (at far left). (sciencephoto.com)
  • Light micro-graphs of sections from control (A), C2C12/GFP- (B) and C2C12/RLX-transplanted hearts (C), stained with Van Gieson for collagen. (nih.gov)
  • Light micrograph. (shutterstock.com)
  • Light micrograph of a section through a ductal carcinoma (cancer) of the breast. (photos.com)
  • There are no comments for Breast Cancer, Light Micrograph . (photos.com)
  • Other compelling images included a light micrograph of a teensy parasitoid wasp ( Wallaceaphytis kikiae ), measuring just 0.03 inches (0.75 millimeters) long. (livescience.com)
  • Polarized light micrograph of a cross-section of a cat tongue. (livescience.com)
  • The judges also praised a polarized light micrograph of a cross-section of a cat's tongue, prepared on a vintage slide during the Victorian era. (livescience.com)
  • Besides light microscopy support, most of our projects within the institute are on ultra-thin sectioning of tissues, cells and cell components. (mpg.de)
  • Insulin crystals, light micrograph. (diabetologia-journal.org)
  • Polished section (from microprobe analysis) in reflected light. (webmineral.com)
  • Schematic drawing of the longitudinal cross-section of a tooth. (intarch.ac.uk)
  • 1 , 2 , 3 , 4 , 5 , 6 Spatially resolved spectroscopic images provide, in essence, a histological image of the distribution of endogenous biochemical components (proteins, lipids, DNA) within a tissue section without the use of stains or probes. (spiedigitallibrary.org)
  • Scanned thin-section of sample EIN-15 showing the pattern of microbial tunnelling. (intarch.ac.uk)
  • Scanned thin-section of sample EIN-22. (intarch.ac.uk)
  • Paleohistological thin section from a 96-million-year-old fossil side-necked turtle shell from the Arlington Archosaur Site. (faseb.org)
  • A) Thin section electron micrograph of D. radiodurans tetrad. (intechopen.com)
  • Ventral view of the gladius of O. ingens with cross-sections and a side view of the conus and rostrum. (tolweb.org)
  • Amacrine profiles vary between being very small cross sections through thin straight tubes, and larger varicosities budding off the dendrites. (utah.edu)
  • Factor analysis of the image plane acquired with IR microscopy in hair sections, permits delineation of specific micro-regions within the hair. (spiedigitallibrary.org)
  • A-F) Gal1 mRNA and protein expression in mouse spinal cord tissue and confocal microscopy of spinal cord white matter sections from CFA immunized (control), preclinical EAE (preclinical, 10 dpi), acute EAE (acute, 20 dpi) and chronic EAE (chronic, 40 dpi) mice. (nih.gov)
  • Section of a bronchus with cilia (yellow) on top of the mucous membrane cells (red) and connective tissue (grey) containing two blood vessels. (eyeofscience.de)
  • Electron micrographs showing the association of vimentin filaments with the forming of LDs after brief AIM stimulation of human preadipocytes. (figshare.com)
  • This year, Luis de la Torre-Ubieta, a postdoctoral fellow at UCLA, created a micrograph of a slice of a mouse brain to show the deep structures inside, including color-coded nerve cells. (livescience.com)
  • To understand better the localization of SwmA, further TEM analyses of thin sections as well as of whole cells were undertaken. (asm.org)
  • Sections were stained with anti-Gal1 antibody (green), the nuclear marker Topro3 (blue) and anti-GFAP (D, red), anti-CD4 (E, red), or anti-CD11b (F, red) antibodies. (nih.gov)
  • This micrograph shows a cross-section of intestinal villi. (faseb.org)
  • d) A glancing section through a sieve plate in a developing cotyledon of castor bean shows large sieve pores (arrows), sieve‐element plastids (p), one mitochondrion (m) and filamentous P protein. (els.net)
  • Weight values typically differed by 1 to 2 sections. (plos.org)
  • Electron micrograph of the Ebola Zaire virus. (kenyon.edu)
  • We routinely process biopsies/specimens into plastic medium, cut one micron sections of the specimen and select samples of these sections for thin sectioning. (washington.edu)
  • TEM micrograph of a plastic section containing Mimivirus virions infecting a cell culture at 4h post infection. (nih.gov)
  • [14] This is exemplified by the micrograph of pollen shown above. (wikipedia.org)
  • Due to the very narrow electron beam, SEM micrographs have a large depth of field yielding a characteristic three-dimensional appearance useful for understanding the surface structure of a sample. (wikipedia.org)
  • Micrograph of sample EIN-23. (intarch.ac.uk)
  • Micrograph of sample EIN-05 showing globular-shaped tunnels within the dentine. (intarch.ac.uk)
  • Edge weights are represented by the number of 70-90 nm serial sections of pre-synaptic densities. (plos.org)
  • Micrographs of sections of porcine coronoary organ cultures at day 28, staining with elastica van gieson: untreated control (A), ex vivo ballooning (B) and ex vivo ballooning with simultaneous intra/extravascular antiproliferative drug therapy (C). arrow = area of neointimal thickening. (nih.gov)
  • So far the plant has not been found of any special importance in medicine or the arts, but to the microscopist, sections of its stems are of great interest. (mentalfloss.com)
  • Find support for a specific problem in the support section of our website. (mdpi.com)
  • The personal equation must be left out, for it is hardly likely that any naturalist can suggest an improvement in the design of a diatom, of a radiolarian, or of a section of an ordinary plant. (mentalfloss.com)
  • Research begins with preparing very thin sections of bone. (icr.org)
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 909, Issue. (cambridge.org)
  • a) Grazing section of two very small LDs (approx. (figshare.com)
  • CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website. (cdc.gov)

No images available that match "micrograph of a section"