That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.
The smaller subunits of MYOSINS that bind near the head groups of MYOSIN HEAVY CHAINS. The myosin light chains have a molecular weight of about 20 KDa and there are usually one essential and one regulatory pair of light chains associated with each heavy chain. Many myosin light chains that bind calcium are considered "calmodulin-like" proteins.
The absence of light.
The conversion of absorbed light energy into molecular signals.
Light sources used to activate polymerization of light-cured DENTAL CEMENTS and DENTAL RESINS. Degree of cure and bond strength depends on exposure time, wavelength, and intensity of the curing light.
The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs and stimuli, hormone secretion, sleeping, and feeding.
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)
That portion of the electromagnetic spectrum immediately below the visible range and extending into the x-ray frequencies. The longer wavelengths (near-UV or biotic or vital rays) are necessary for the endogenous synthesis of vitamin D and are also called antirachitic rays; the shorter, ionizing wavelengths (far-UV or abiotic or extravital rays) are viricidal, bactericidal, mutagenic, and carcinogenic and are used as disinfectants.
Specialized cells that detect and transduce light. They are classified into two types based on their light reception structure, the ciliary photoreceptors and the rhabdomeric photoreceptors with MICROVILLI. Ciliary photoreceptor cells use OPSINS that activate a PHOSPHODIESTERASE phosphodiesterase cascade. Rhabdomeric photoreceptor cells use opsins that activate a PHOSPHOLIPASE C cascade.
The synthesis by organisms of organic chemical compounds, especially carbohydrates, from carbon dioxide using energy obtained from light rather than from the oxidation of chemical compounds. Photosynthesis comprises two separate processes: the light reactions and the dark reactions. In higher plants; GREEN ALGAE; and CYANOBACTERIA; NADPH and ATP formed by the light reactions drive the dark reactions which result in the fixation of carbon dioxide. (from Oxford Dictionary of Biochemistry and Molecular Biology, 2001)
An enzyme that phosphorylates myosin light chains in the presence of ATP to yield myosin-light chain phosphate and ADP, and requires calcium and CALMODULIN. The 20-kDa light chain is phosphorylated more rapidly than any other acceptor, but light chains from other myosins and myosin itself can act as acceptors. The enzyme plays a central role in the regulation of smooth muscle contraction.
The time period of daily exposure that an organism receives from daylight or artificial light. It is believed that photoperiodic responses may affect the control of energy balance and thermoregulation.
Adjustment of the eyes under conditions of low light. The sensitivity of the eye to light is increased during dark adaptation.
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.
A blue-green biliprotein widely distributed in the plant kingdom.
The visually perceived property of objects created by absorption or reflection of specific wavelengths of light.
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.
The adjustment of the eye to variations in the intensity of light. Light adaptation is the adjustment of the eye when the light threshold is increased; DARK ADAPTATION when the light is greatly reduced. (From Cline et al., Dictionary of Visual Science, 4th ed)
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.
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.
Flavoproteins that function as circadian rhythm signaling proteins in ANIMALS and as blue-light photoreceptors in PLANTS. They are structurally-related to DNA PHOTOLYASES and it is believed that both classes of proteins may have originated from an earlier protein that played a role in protecting primitive organisms from the cyclical exposure to UV LIGHT.
Porphyrin derivatives containing magnesium that act to convert light energy in photosynthetic organisms.
One of the types of light chain subunits of the immunoglobulins with a molecular weight of approximately 22 kDa.
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.
Elements of limited time intervals, contributing to particular results or situations.
The branch of biology dealing with the effect of light on organisms.
Constriction of the pupil in response to light stimulation of the retina. It refers also to any reflex involving the iris, with resultant alteration of the diameter of the pupil. (Cline et al., Dictionary of Visual Science, 4th ed)
Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity.
Therapy using oral or topical photosensitizing agents with subsequent exposure to light.
A member of tumor necrosis factor superfamily found on activated LYMPHOCYTES and MONOCYTES. It occurs as transmembrane protein that can be cleaved to release a secreted form that specifically binds to LYMPHOTOXIN BETA RECEPTOR and TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY, MEMBER 14.
A biogenic amine that is found in animals and plants. In mammals, melatonin is produced by the PINEAL GLAND. Its secretion increases in darkness and decreases during exposure to light. Melatonin is implicated in the regulation of SLEEP, mood, and REPRODUCTION. Melatonin is also an effective antioxidant.
The process in which light signals are transformed by the PHOTORECEPTOR CELLS into electrical signals which can then be transmitted to the brain.
Drugs that are pharmacologically inactive but when exposed to ultraviolet radiation or sunlight are converted to their active metabolite to produce a beneficial reaction affecting the diseased tissue. These compounds can be administered topically or systemically and have been used therapeutically to treat psoriasis and various types of neoplasms.
Specialized cells in the invertebrates that detect and transduce light. They are predominantly rhabdomeric with an array of photosensitive microvilli. Illumination depolarizes invertebrate photoreceptors by stimulating Na+ influx across the plasma membrane.
A plant genus of the family BRASSICACEAE that contains ARABIDOPSIS PROTEINS and MADS DOMAIN PROTEINS. The species A. thaliana is used for experiments in classical plant genetics as well as molecular genetic studies in plant physiology, biochemistry, and development.
A plant photo regulatory protein that exists in two forms that are reversibly interconvertible by LIGHT. In response to light it moves to the CELL NUCLEUS and regulates transcription of target genes. Phytochrome B plays an important role in shade avoidance and mediates plant de-etiolation in red light.
That portion of the electromagnetic spectrum usually sensed as heat. Infrared wavelengths are longer than those of visible light, extending into the microwave frequencies. They are used therapeutically as heat, and also to warm food in restaurants.
Microscopy using polarized light in which phenomena due to the preferential orientation of optical properties with respect to the vibration plane of the polarized light are made visible and correlated parameters are made measurable.
Photosensitive proteins expressed in the ROD PHOTORECEPTOR CELLS. They are the protein components of rod photoreceptor pigments such as RHODOPSIN.
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.
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.
The light chain subunits of clathrin.
The rate dynamics in chemical or physical systems.
Chemical reactions effected by light.
The primary plant photoreceptor responsible for perceiving and mediating responses to far-red light. It is a PROTEIN-SERINE-THREONINE KINASE that is translocated to the CELL NUCLEUS in response to light signals.
Proteins that originate from plants species belonging to the genus ARABIDOPSIS. The most intensely studied species of Arabidopsis, Arabidopsis thaliana, is commonly used in laboratory experiments.
The directional growth of organisms in response to light. In plants, aerial shoots usually grow towards light. The phototropic response is thought to be controlled by auxin (= AUXINS), a plant growth substance. (From Concise Dictionary of Biology, 1990)
A large multisubunit protein complex found in the THYLAKOID MEMBRANE. It uses light energy derived from LIGHT-HARVESTING PROTEIN COMPLEXES to catalyze the splitting of WATER into DIOXYGEN and of reducing equivalents of HYDROGEN.
The region of the stem beneath the stalks of the seed leaves (cotyledons) and directly above the young root of the embryo plant. It grows rapidly in seedlings showing epigeal germination and lifts the cotyledons above the soil surface. In this region (the transition zone) the arrangement of vascular bundles in the root changes to that of the stem. (From Concise Dictionary of Biology, 1990)
Photosensitive afferent neurons located in the peripheral retina, with their density increases radially away from the FOVEA CENTRALIS. Being much more sensitive to light than the RETINAL CONE CELLS, the rod cells are responsible for twilight vision (at scotopic intensities) as well as peripheral vision, but provide no color discrimination.
An optical source that emits photons in a coherent beam. Light Amplification by Stimulated Emission of Radiation (LASER) is brought about using devices that transform light of varying frequencies into a single intense, nearly nondivergent beam of monochromatic radiation. Lasers operate in the infrared, visible, ultraviolet, or X-ray regions of the spectrum.
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.
The property of emitting radiation while being irradiated. The radiation emitted is usually of longer wavelength than that incident or absorbed, e.g., a substance can be irradiated with invisible radiation and emit visible light. X-ray fluorescence is used in diagnosis.
Specialized PHOTOTRANSDUCTION neurons in the vertebrates, such as the RETINAL ROD CELLS and the RETINAL CONE CELLS. Non-visual photoreceptor neurons have been reported in the deep brain, the PINEAL GLAND and organs of the circadian system.
Complexes containing CHLOROPHYLL and other photosensitive molecules. They serve to capture energy in the form of PHOTONS and are generally found as components of the PHOTOSYSTEM I PROTEIN COMPLEX or the PHOTOSYSTEM II PROTEIN COMPLEX.
The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.
Protein complexes that take part in the process of PHOTOSYNTHESIS. They are located within the THYLAKOID MEMBRANES of plant CHLOROPLASTS and a variety of structures in more primitive organisms. There are two major complexes involved in the photosynthetic process called PHOTOSYSTEM I and PHOTOSYSTEM II.
Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in plants.
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.
Plant cell inclusion bodies that contain the photosynthetic pigment CHLOROPHYLL, which is associated with the membrane of THYLAKOIDS. Chloroplasts occur in cells of leaves and young stems of plants. They are also found in some forms of PHYTOPLANKTON such as HAPTOPHYTA; DINOFLAGELLATES; DIATOMS; and CRYPTOPHYTA.
Photosensitive protein complexes of varied light absorption properties which are expressed in the PHOTORECEPTOR CELLS. They are OPSINS conjugated with VITAMIN A-based chromophores. Chromophores capture photons of light, leading to the activation of opsins and a biochemical cascade that ultimately excites the photoreceptor cells.
The aperture in the iris through which light passes.
Measurement of the index of refraction (the ratio of the velocity of light or other radiation in the first of two media to its velocity in the second as it passes from one into the other).
Experimentally produced harmful effects of ionizing or non-ionizing RADIATION in CHORDATA animals.
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.
A retrogressive pathological change in the retina, focal or generalized, caused by genetic defects, inflammation, trauma, vascular disease, or aging. Degeneration affecting predominantly the macula lutea of the retina is MACULAR DEGENERATION. (Newell, Ophthalmology: Principles and Concepts, 7th ed, p304)
Irradiation directly from the sun.
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.
The relationship between the dose of administered radiation and the response of the organism or tissue to the radiation.
A family of nonmetallic, generally electronegative, elements that form group 17 (formerly group VIIa) of the periodic table.
The introduction of a phosphoryl group into a compound through the formation of an ester bond between the compound and a phosphorus moiety.
Very young plant after GERMINATION of SEEDS.
Proteins found in plants (flowers, herbs, shrubs, trees, etc.). The concept does not include proteins found in vegetables for which VEGETABLE PROTEINS is available.
A pre-emergent herbicide.
Iron-free derivatives of heme with 4 methyl groups, 2 hydroxyethyl groups and 2 propionic acid groups attached to the pyrrole rings. Some of these PHOTOSENSITIZING AGENTS are used in the PHOTOTHERAPY of malignant NEOPLASMS.
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).
A phylum of oxygenic photosynthetic bacteria comprised of unicellular to multicellular bacteria possessing CHLOROPHYLL a and carrying out oxygenic PHOTOSYNTHESIS. Cyanobacteria are the only known organisms capable of fixing both CARBON DIOXIDE (in the presence of light) and NITROGEN. Cell morphology can include nitrogen-fixing heterocysts and/or resting cells called akinetes. Formerly called blue-green algae, cyanobacteria were traditionally treated as ALGAE.
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.
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.
Emission of LIGHT when ELECTRONS return to the electronic ground state from an excited state and lose the energy as PHOTONS. It is sometimes called cool light in contrast to INCANDESCENCE. LUMINESCENT MEASUREMENTS take advantage of this type of light emitted from LUMINESCENT AGENTS.
An immunolglobulin light chain-like protein composed of an IMMUNOGLOBULIN VARIABLE REGION-like peptide (such as light chain like lambda5 peptide) and an IMMUNOGLOBULIN CONSTANT REGION-like peptide (such as Vpreb1 peptide). Surrogate light chains associate with MU IMMUNOGLOBULIN HEAVY CHAINS in place of a conventional immunoglobulin light chains to form pre-B cell receptors.
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.
A syndrome characterized by depressions that recur annually at the same time each year, usually during the winter months. Other symptoms include anxiety, irritability, decreased energy, increased appetite (carbohydrate cravings), increased duration of sleep, and weight gain. SAD (seasonal affective disorder) can be treated by daily exposure to bright artificial lights (PHOTOTHERAPY), during the season of recurrence.
The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway.
The measurement of the amplitude of the components of a complex waveform throughout the frequency range of the waveform. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
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.
Measurement of the various properties of light.
Materials that have a limited and usually variable electrical conductivity. They are particularly useful for the production of solid-state electronic devices.
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.
Techniques used for determining the values of photometric parameters of light resulting from LUMINESCENCE.
A phylum of the kingdom Metazoa. Mollusca have soft, unsegmented bodies with an anterior head, a dorsal visceral mass, and a ventral foot. Most are encased in a protective calcareous shell. It includes the classes GASTROPODA; BIVALVIA; CEPHALOPODA; Aplacophora; Scaphopoda; Polyplacophora; and Monoplacophora.
Electron microscopy in which the ELECTRONS or their reaction products that pass down through the specimen are imaged below the plane of the specimen.
The physiological mechanisms that govern the rhythmic occurrence of certain biochemical, physiological, and behavioral phenomena.
Discrete concentrations of energy, apparently massless elementary particles, that move at the speed of light. They are the unit or quantum of electromagnetic radiation. Photons are emitted when electrons move from one energy state to another. (From Hawley's Condensed Chemical Dictionary, 11th ed)
The portion of a retinal rod cell situated between the ROD INNER SEGMENT and the RETINAL PIGMENT EPITHELIUM. It contains a stack of photosensitive disk membranes laden with RHODOPSIN.
A phosphoprotein phosphatase that is specific for MYOSIN LIGHT CHAINS. It is composed of three subunits, which include a catalytic subunit, a myosin binding subunit, and a third subunit of unknown function.
Behavior of LIGHT and its interactions with itself and materials.
A light-sensitive neuroendocrine organ attached to the roof of the THIRD VENTRICLE of the brain. The pineal gland secretes MELATONIN, other BIOGENIC AMINES and NEUROPEPTIDES.
The non-genetic biological changes of an organism in response to challenges in its ENVIRONMENT.
That region of the immunoglobulin molecule that varies in its amino acid sequence and composition, and comprises the binding site for a specific antigen. It is located at the N-terminus of the Fab fragment of the immunoglobulin. It includes hypervariable regions (COMPLEMENTARITY DETERMINING REGIONS) and framework regions.
Electrophoresis in which a polyacrylamide gel is used as the diffusion medium.
Processes and properties of the EYE as a whole or of any of its parts.
A group of sporadic, familial and/or inherited, degenerative, and infectious disease processes, linked by the common theme of abnormal protein folding and deposition of AMYLOID. As the amyloid deposits enlarge they displace normal tissue structures, causing disruption of function. Various signs and symptoms depend on the location and size of the deposits.
The largest of polypeptide chains comprising immunoglobulins. They contain 450 to 600 amino acid residues per chain, and have molecular weights of 51-72 kDa.
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.
Membranous cisternae of the CHLOROPLAST containing photosynthetic pigments, reaction centers, and the electron-transport chain. Each thylakoid consists of a flattened sac of membrane enclosing a narrow intra-thylakoid space (Lackie and Dow, Dictionary of Cell Biology, 2nd ed). Individual thylakoids are interconnected and tend to stack to form aggregates called grana. They are found in cyanobacteria and all plants.
Abnormal sensitivity to light. This may occur as a manifestation of EYE DISEASES; MIGRAINE; SUBARACHNOID HEMORRHAGE; MENINGITIS; and other disorders. Photophobia may also occur in association with DEPRESSION and other MENTAL DISORDERS.
Contractile tissue that produces movement in animals.
Oxygenated forms of carotenoids. They are usually derived from alpha and beta carotene.
Plant proteins that mediate LIGHT SIGNAL TRANSDUCTION. They are involved in PHOTOTROPISM and other light adaption responses during plant growth and development . They include the phototropins, phytochromes (PHYTOCHROME), and members of the ubiquitous cryptochrome family.
Multicellular, eukaryotic life forms of kingdom Plantae (sensu lato), comprising the VIRIDIPLANTAE; RHODOPHYTA; and GLAUCOPHYTA; all of which acquired chloroplasts by direct endosymbiosis of CYANOBACTERIA. They are characterized by a mainly photosynthetic mode of nutrition; essentially unlimited growth at localized regions of cell divisions (MERISTEMS); cellulose within cells providing rigidity; the absence of organs of locomotion; absence of nervous and sensory systems; and an alternation of haploid and diploid generations.
Light absorbing proteins and protein prosthetic groups found in certain microorganisms. Some microbial photoreceptors initiate specific chemical reactions which signal a change in the environment, while others generate energy by pumping specific ions across a cellular membrane.
Unstriated and unstriped muscle, one of the muscles of the internal organs, blood vessels, hair follicles, etc. Contractile elements are elongated, usually spindle-shaped cells with centrally located nuclei. Smooth muscle fibers are bound together into sheets or bundles by reticular fibers and frequently elastic nets are also abundant. (From Stedman, 25th ed)
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.
Biological mechanism that controls CIRCADIAN RHYTHM. Circadian clocks exist in the simplest form in cyanobacteria and as more complex systems in fungi, plants, and animals. In humans the system includes photoresponsive RETINAL GANGLION CELLS and the SUPRACHIASMATIC NUCLEUS that acts as the central oscillator.
The art or process of comparing photometrically the relative intensities of the light in different parts of the spectrum.
Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.
The hardening or polymerization of bonding agents (DENTAL CEMENTS) via exposure to light.
Blue-light receptors that regulate a range of physiological responses in PLANTS. Examples include: PHOTOTROPISM, light-induced stomatal opening, and CHLOROPLAST movements in response to changes in light intensity.
Photosensitive proteins in the membranes of PHOTORECEPTOR CELLS such as the rods and the cones. Opsins have varied light absorption properties and are members of the G-PROTEIN-COUPLED RECEPTORS family. Their ligands are VITAMIN A-based chromophores.
Established cell cultures that have the potential to propagate indefinitely.
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.
Measurement of the intensity and quality of fluorescence.
A part of the embryo in a seed plant. The number of cotyledons is an important feature in classifying plants. In seeds without an endosperm, they store food which is used in germination. In some plants, they emerge above the soil surface and become the first photosynthetic leaves. (From Concise Dictionary of Biology, 1990)
A phenothiazine that has been used as a hemostatic, a biological stain, and a dye for wool and silk. Tolonium chloride has also been used as a diagnostic aid for oral and gastric neoplasms and in the identification of the parathyroid gland in thyroid surgery.
The sum of the weight of all the atoms in a molecule.
A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).
The property of nonisotropic media, such as crystals, whereby a single incident beam of light traverses the medium as two beams, each plane-polarized, the planes being at right angles to each other. (Cline et al., Dictionary of Visual Science, 4th ed)
The parts of a macromolecule that directly participate in its specific combination with another molecule.
The outward appearance of the individual. It is the product of interactions between genes, and between the GENOTYPE and the environment.
Chemical bond cleavage reactions resulting from absorption of radiant energy.
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).
Methods of creating machines and devices.
The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.
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.
The effects of ionizing and nonionizing radiation upon living organisms, organs and tissues, and their constituents, and upon physiologic processes. It includes the effect of irradiation on food, drugs, and chemicals.
Adaptation to a new environment or to a change in the old.
Histochemical localization of immunoreactive substances using labeled antibodies as reagents.
In 2017, she presents the installation Llum! (Light!) with neon and glass at Montjuïc Castle in Barcelona, as a reflection of ...
He is then led by the light of God. God appears as his father in white; this portraying God's innocence. He is then led by God ... The little boy lost in the lonely fen, Led by the wand'ring light, Began to cry, but God ever nigh, Appeard like his father in ... light". The repetition of sound creates a rhythmic flow, setting the tone for the rest of the poem. The poem consists of two ...
All these scientists experimented with a small hole and light but none of them suggested that a screen is used so an image from ... While the effects of a single light passing through a pinhole had been described earlier, Ibn al-Haytham gave the first correct ... Daguerre treated a silver-plated sheet of copper with iodine vapor to give it a coating of light-sensitive silver iodide. After ... After focusing, the ground glass was replaced with a light-tight holder containing the sensitized plate or paper and the lens ...
Light. Donga, 1991. 『들』, 창작과비평사, 1992. Field. Changbi, 1992. 『고삐』, 풀빛, 1993. Reigns. Pulbit, 1993. 『고삐2』, 풀빛, 1993 Reigns 2. ...
Light.", Irish Museum of Modern Art, Retrieved 26 December 2018. "Compass in Hand: Selections from the Judith Rothschild ...
Australian Festival of Light and Community Standards Organisation, February 1996. p 12. "How the media saw Gianna". Light. ... Australian Festival of Light and Community Standards Organisation. May 1996. p. 12. "President Signs Born-Alive Infants ... In early 1996, Festival of Light Australia sponsored an Australian tour, during which Jessen spoke at venues in all states and ... ISBN 1-56179-415-5. "Gianna - glad to be alive". Light. ...
"Light". Electoral District Maps. Electoral Districts Boundaries Commission, Government of South Australia. Retrieved 6 January ...
Light. Sol Felty (2007). The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon. University of ...
CS1 maint: discouraged parameter (link) Isler, Scott (January 1981). "Light! Camera! XTCion!". Trouser Press. Ingham, Chris ( ...
It is sold in the following varieties: Original; Extra Creamy; Light; Fat Free; Non-Dairy; and Chocolate. In 2019, two new ...
"Light". Yona of the Dawn. Episode 14. 2015. "Never Back Down On Love". Yurikuma Arashi. Episode 1. 2015. "The Wind of Africa". ...
... "traffic light", "street light", which is literally equivalent to "light of road-LOC". The personal pronouns each have their own ... light; switch on; start (e.g. a car)" -choka "to become tired" → -chosha "to tire; be tiring; be tiresome; be boring" -kumbuka ...
Peter DeLuise (director); Brad Wright (writer). "Light". Stargate Universe. Season 1. Episode 5. Syfy. Robert C. Cooper ( ...
Tree of Light. Ivorypress LiberArs, 2011. Edited by Pedro Cabrita Reis. English/Spanish edition Thomas Demand. Model Studies. ... "Light". Ivorypress, Madrid, Spain. 30/05/2017 - 15/07/2017 Yves Berger. "From the orchard to the garden". Ivorypress, Madrid, ... "Broken Light". Ivorypress, Madrid, Spain. 12/09/2018 - 03/11/2018 Gavin Turk. "White Van Man". Ivorypress, Madrid, Spain. 15/11 ... Broken Light. Ivorypress, 2018. English edition Gavin Turk. White Van Man. Ivorypress, 2018. English edition Guillaume Bruère. ...
Light. 1926. No. 20 (164). Smirnov, N. "The case of the murder of Baku commissars".. ...
... and λ is the wavelength of light. For standard black-and-white film, a wavelength of light corresponding to yellow-green (550 ... Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known ... In its simplest form, the photographic pinhole camera can consist of a light-tight box with a pinhole in one end, and a piece ... A pinhole camera is a simple camera without a lens but with a tiny aperture (the so-called pinhole)-effectively a light-proof ...
South America: Copel; AES Eletropaulo; Ampla - Enel/ENDESA Group; Light; CEMIG; National Electricity Administration, Paraguay ( ... China Light & Power; Singapore Power. North America: Oncor Energy; Pacific Gas and Electric; Hydro-Québec; AEP Texas. ...
Shri Shantadurga is goddess of Wealth; prosperity; light; wisdom; fortune; fertility; generosity; courage; beauty;Divine; grace ...
ISBN 951-1-08579-4. Light. Poems. Helsinki: Ottawa, 1988. ISBN 951-1-10347-4. Poems 1971-1990 . Collected poems. Helsinki: ...
CS1 maint: discouraged parameter (link) Sparg; Kulkarni; Light; Van Staden (August 2005). "Improving seedling vigour of ...
Ford, Tom (1998). "Light". Visionaire (24). Retrieved 13 December 2017. Wolf, Sylvia. With an essay by Andy Grundberg. Pref. by ... "Light". It has also been included in the books Visions from America: Photography from the Whitney Museum of American Art 1940- ...
Lighted objects reflect rays of light in all directions. A small enough opening in a barrier admits only the rays that travel ... light. Light coming from the foot of an illuminated person were partly hidden below (i.e., strike below the pinhole) and partly ... the light will return. He described a "dark chamber", and experimented with light passing through small pinholes, using three ... and each of those lights (spots of light) appears directly opposite one (particular) candle along a straight line passing ...
Light. The song was the theme song for both the UK government's Shine Week 2009 and The Message Trust's own Shine Your Light ... In October, LZ7 had their first chart hit, when their single "This Little Light" made No. 26 on the UK Singles Chart and No. 4 ... From the release of their new album and single, LZ7 went on 'The Light Tour', which saw them perform across the UK and further ... "Shine Your Light". The Message Trust. 15 June 2010. Archived from the original on 17 July 2011. Retrieved 12 October 2010. The ...
Isler, Scott (January 1981). "Light! Camera! XTCion!". Trouser Press. Twomey 1992, p. 104. Twomey 1992, pp. 105-106. Christgau ...
Light". An optional heat pump extending range under low temperature conditions is offered or even fitted as standard in certain ... Headlights and taillights are mostly LED lamps on the ID.4, with Matrix LED lights being an optional feature. The front ... By default, the vehicle includes a light strip below the windscreen providing visual cues related to certain functions such as ...
In light of later developments it may be interesting to take note of Thomas Breakwell who died in Paris in 1902. Ultimately a ... "It was made clear that the Baha'i Revelation had dawned to bring new light and truth into the world as a leaven for all Faiths ... Bride, a Cup was brought out into the light of day. This vessel is the symbol of the heavenly and eternal Grail, the Chalice of ... The thunder passed, and the hill was bathed in quiet light, and I became aware of a mighty Presence standing beside me, full of ...
Light sales in China's three major music platforms: "Light - QQ Music". QQ Music. Retrieved 27 June 2020. "Light". Kugou. ... "Light". Kuwo. Retrieved 27 June 2020. Fan, Xu (10 October 2014). "Uncle cool". China Daily. Archived from the original on 8 ...
Light; Horse Sense; Did They ... Or Didn't They?; Science vs. Rome (8/6/01) - Rome tries Galileo Survival; Fire; It's Mine, All ...
"Spectrum: Little Willies". Light. Retrieved 19 December 2019. Streamer, Col. D. (1901). Ruthless Rhymes for Heartless Homes. ... Little Willie rhymes are light verses including an indifferent or cheerfully inappropriate response to a gruesome act of ...
"Dies irae ~Amantes amentes~ , light Android / iOS サポート". Light. Archived from the original on 2016-12-05. Retrieved 2017-06-07 ... Light experimented with games at the time, and created things they wanted to make; after developing Paradise Lost, they decided ... Light had initially expressed interest in an English localization of the smartphone game before its cancelation. "Dies irae ~ ... Dies irae was developed by Light, and was produced by Hattori Michisato and written by Takashi Masada, with art by G-Yuusuke ...
Units such as the light-minute, light-hour and light-day are sometimes used in popular science publications. The light-month, ... "Gly" for a gigalight-year (1,000,000,000 light years)[19]. History[edit]. The light-year unit appeared a few years after the ... Light travels approximately one foot in a nanosecond; the term "light-foot" is sometimes used as an informal measure of time.[ ... The Universe within 12.5 Light Years: The Nearest Stars *^ a b c d e International Astronomical Union, Measuring the Universe: ...
Newspaper articles about the Spook Light. Other Spook Lights around the world. Stories about the Spook Light. ... Directions to the Spook Light from Joplin, Missouri, Neosho, Missouri and Miami, Oklahoma. ... Spook Light Updates. Visit Real Spook Light on Facebook, Twitter, and YouTube you can also contact the Real Spook Light by ... The Hornet Spook Light is not the only strange light around. There are others in the US and around the world. click here to see ...
Light pressure is equal to the power of the light beam divided by c, the speed of light. Due to the magnitude of c, the effect ... Speed of light. Main article: Speed of light. The speed of light in a vacuum is defined to be exactly 299,792,458 m/s (approx. ... Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that can be perceived by ... The study of light and the interaction of light and matter is termed optics. The observation and study of optical phenomena ...
Its been months since we heard about Ryan Reynolds time travel movie for Netflix, which we learned back in April will be about a guy who goes back in time to stop some villain, interacting with both himself as a teenager and his now-deceased father along the way, and now The Hollywood Reporter has the scoop on the rest of the films surprisingly famous cast. For starters, Mark Ruffalo will be playing Reynolds father, a "brilliant physicist" of some kind, with a kid named Walker Scobell playing young Reynolds in what is apparently his "first professional gig." ...
Camp Little Lights desire is to provide a simple, relaxing environment for families to grow closer to God and each to other. ... such a place does exist and its called Camp Little Light. ...
My name is Zuzka Light, and my channel is all about Fitness, Healthy Lifestyle and Holistic Health. I post tips about exercise ... What I Eat In a Day , Zuzka Light - Duration: 7 minutes, 2 seconds.. Zuzka Light ... My Make Up Routine , Zuzka Light - Duration: 5 minutes, 6 seconds.. Zuzka Light ... Zuzka Light. 12400 Ventura Blvd #1252. Studio City CA, 91604. Email Address:. [email protected] Show less ...
White light. If we look beyond the greatest galaxies and universes, what do we find? Light. The very same light. Light is ... This is light technology, the use of consciousness and light, as well as the science that explains it.. Why do I claim these ... More about light and colors, Throat chakra, thyroid gland, iodine. An article about Light Tech which was the first one I wrote ... The nourishing light. - Light Technology. When reading in various sources about breatharianism, different sources for ...
Light show may refer to: Drone display Laser lighting display (Laser show) Liquid light shows Christmas lights Meteor shower ... Wizards in Winter Christmas light show This disambiguation page lists articles associated with the title Light show. If an ...
... : The Luminist Movement, 1850-1875: Paintings, Drawings, Photographs ,/i,. ... American Light: The Luminist Movement, 1850-1875: Paintings, Drawings, Photographs. John Wilmerding, with contributions by Lisa ... American Light makes a fresh and comprehensive examination of the culminating phase of Hudson River painting, now commonly ... American Light: The Luminist Movement, 1850-1875, Paintings, Drawings, Photographs. Hudson River School Visions: The Landscapes ...
... whether from light bulbs, flames, flashlights, or the Sun (our most important source of light). We see objects because they ... We see light every day-whether from light bulbs, flames, flashlights, or the Sun (our most important source of light). We see ... Types of light: gamma rays, X-rays, ultraviolet light, visible light, infrared rays, microwaves, and radio waves. ... A light-year is the distance that light travels in one year, or about six trillion miles. Astronomers use this measurement ...
Uv light water treatment camping Diy repair bmw Homemade led lamp for nails price Buy uv light brisbane weather Uv light ... Use the form below to delete this Soldiers Machine Gun Army Weapons M249 Light image from our index. Use the form below to ... ... Use the form below to delete this BREN Light Machine Gun Description Use And Mechanism UK0000 Mycity image from our index. ... Dying Light: The Following - Enhanced Edition will be available from digital stores a.... ...
... (also known as delexical verbs, thin verbs, semantically weak verbs, or empty verbs) are verbs that do not carry ... Light Verbs What is a light verb?. Light verbs (also known as delexical verbs, thin verbs, semantically weak verbs, or empty ... Using Light Verbs. Light verbs function by pairing with a word or words (usually, but not always, a noun or noun phrase) to ... Common Light Verbs. Unfortunately, the only way to become familiar with the various meanings and uses of light verbs is to ...
... "light"), German Licht ("light"). Related also to Swedish ljus ("light"), Icelandic ljós ("light"), Latin lūx ("light"), Russian ... light (third-person singular simple present lights, present participle lighting, simple past and past participle lit or lighted ... light (third-person singular simple present lights, present participle lighting, simple past and past participle lit or lighted ... light (comparative lighter, superlative lightest). *Of low weight; not heavy. My bag was much lighter once I had dropped off ...
What is circadian-friendly: a light that is still white, but minimizes blue in its color spectrum. Blue light has the biggest ... Having developed the light using proven scientific principles, we hope to bring healthy illumination for night-time tasks. The ... How important/essential would this feature be to you: If the light turned with loud sounds, such as your morning alarm going ... Do you turn on the overhead lights when you check on your child or walk around the house at night? ...
Textbook of Light. Nature volume 148, page300(1941)Cite this article ... Textbook of Light.. By Dr. R. Wallace Stewart Prof. John Satterly. Seventh edition, revised by Prof. C. T. Archer. Pp. vii + ... Archer in the revised version of Stewart and Satterlys "Textbook of Light". The book contains a treatment of the elements of ... Textbook of Light. Nature 148, 300 (1941). ...
Red Light! Green Light! Mondo Announces Mission: Impossible Vinyl Soundtrack Release 03 August 2018 , Slash Film ... Red Light (1949) Passed , 1h 23min , Crime, Drama, Film-Noir , 30 September 1949 (USA) ... Lights out 26 May 2013 , by AAdaSC - See all my reviews George Raft (Johnny Torno) owns a trucking company. Because of his real ... I assume the lights in the final scene are red - its a bit of a strange title for a black and white film. ...
... flattering light on your subjects, anywhere from in the studio to the great outdoors. ... In this diffused light photography guide, learn how to shed soft, ... The difference between hard light and soft light.. Hard light, or direct light, creates high-contrast scenes with harsh shadows ... Diffused light, or soft light, is light thats filtered by something. Sunlight through a sheer curtain is diffused. Light from ...
Stars feel each other, even if theyve died millions of years ago, even if theyre light years apart. Taking destiny into her ... But slow to get going.. Once the story of old man time, and light, and family progressed I was swept along with it. Complex ... Stars feel each other, even if theyve died millions of years ago, even if theyre light years apart. Taking destiny into her ...
The Eve Light Switch gives you the comfort and convenience of switching your lights on and off using Siri or with a quick tap ... The Eve Light Switch gives you the comfort and convenience of switching your lights on and off using Siri or with a quick tap ... No more asking my wife if shes ready for me to turn the light off. We just get in bed and one of us commands the light off. ... It works perfectly (I have it in tandem with a Hue light). The unit itself i I bought a single Eve Light Switch to try it out. ...
Style name: Light Rank. Author: sangoku_51. Style description: rank of Light in 2 colors : orange and yellow. Style version: ... Download file: File size: 27.65 KiB. Style overview page: View. The phpBB Team is not responsible nor required to ... Light Rank. All 3.0.x styles released in our Styles Database can be found here. All discussion or support regarding an ...
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely. ...
Eh, whats a "light source?" Basically, its a particle accelerator that, in a controlled manner, sheds light of wavelengths… ... "The light which puts out our eyes is darkness to us. Only that day dawns to which we are awake. There is more day to dawn. The ... "I have this one little saying, when things get too heavy just call me helium, the lightest known gas to man." -Jimi Hendrix ... A little more than one year ago, on the day of its groundbreaking ceremony, the National Synchrotron Light Source II (NSLS-II) ...
The online extension of Billboard magazine, is the essential online destination for the music business.. Learn more ...
light. Photo Synthesis. Tag archives for light. Photo Technique: the White Box. Posted by on April 26, 2009 ...
Retrieved from "" ...
... From the deepest recesses of the ocean to hundreds of miles above earth, Canons renowned imaging technology ... In "See the Light," discover how Canons EOS C300 Mark II, ME20F-SH, and EOS C500 cameras captured the beauty of bioluminescent ... creatures under the sea, the grandeur of the extremely difficult-to-photograph Aurora Borealis (Northern Lights), and the ... .header { position: absolute; width: ...
... and thereby a lighter-weight loudspeaker has been developed.This loudspeaker consists of a light-weight magnetic circuit with a ... for lighter-wight of a loudspeaker, the weight and performance of loudspeakers were analyzed, ... Light Weight Loudspeaker 920078. In accordance with the CAFE program, for lighter-wight of a loudspeaker, the weight and ... Finally, the performance comparison between the newly developed light-weight loudspeaker with a combination of a light-weight ...
  • Above the range of visible light, ultraviolet light becomes invisible to humans, mostly because it is absorbed by the cornea below 360 nm and the internal lens below 400 nm. (
  • The NIOSH research team for the Saturn LED area light won the 2017 NIOSH Bullard-Sherwood Research-to-Practice Award, which recognizes outstanding efforts by scientists and their partners in applying occupational safety and health research to prevent work-related injury, illness, and death. (
  • Light from behind a lampshade is diffused compared to the direct light of a bare bulb. (
  • The Eve Light Switch transforms any single or multi-bulb setup into an intelligent lighting system, so can use your existing bulbs regardless of their shape, size, or color. (
  • Ordinary light, such as that from a light bulb, has many wavelengths and spreads in all directions. (
  • Note: LED light bulb is polarity sensitive. (
  • The bulb is organic in operation, meaning it is basically two panels of phosphorescent diodes combined to release light. (
  • The process results in a superior white light that does not heat up the bulb and waste energy. (
  • What's The Best Light Bulb? (
  • Cree 60W Equivalent Soft White (2700K) A19 LED Light Bulb (4-Pack). (
  • Each BeOn bulb has backup power, so even in the event of a power outage or emergency you'll have some lighting, and if your other home safety appliances-like a smoke detector or carbon monoxide detector-goes off, the lights will respond as well so you can see your way out of the house. (
  • Light Weight Loudspeaker," SAE Technical Paper 920078, 1992, . (
  • METRO's light rail page is at . (
  • For other uses, see Light year (disambiguation) . (
  • For other uses, see Light (disambiguation) and Visible light (disambiguation) . (
  • Light show may refer to: Drone display Laser lighting display (Laser show) Liquid light shows Christmas lights Meteor shower Wizards in Winter Christmas light show This disambiguation page lists articles associated with the title Light show. (
  • [note 1] As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days). (
  • This experiment didn't work because light travels too fast for him to measure over one mile. (
  • A light-year is the distance that light travels in one year, or about six trillion miles. (
  • In a vacuum, light travels at a constant speed of 186,000 miles per second. (
  • Light, of course, is more than color: it is energy, which travels at incredible speeds throughout the universe. (
  • The Greeks recognized that light travels through air in rays, a term from geometry describing that part of a straight line that extends in one direction only. (
  • light-year, in astronomy, unit of length equal to the distance light travels in one sidereal year . (
  • I am now exploring the world of caustics - those magical patterns that are formed when a beam of light travels through transparent textured materials. (
  • [5] [6] In this sense, gamma rays , X-rays , microwaves and radio waves are also light. (
  • There are many kinds of light that our eyes cannot detect, like radio waves, microwaves, and X-rays. (
  • In the same way, you can use a diffusion sheet to filter the harsh rays of the sun or another light source in order to produce a soft, even, complimentary glow at any time of day. (
  • While the rays of hard light are direct, soft light has scattered rays. (
  • All diffusion techniques use the same basic concept: Place a translucent screen, sheet, or filter between a light source and the subject so you diffuse the rays of hard light to create softer lighting. (
  • Unfortunately, they also subscribed to the erroneous concept of intromission - the belief that light rays originate in the eye and travel toward objects, making them visible. (
  • In Newton's time, physicists understood that a prism could be used for the diffusion of light rays - in particular, to produce an array of colors from a beam of white light. (
  • This workbook is about the reflection and refraction of light rays. (
  • A triangular prism dispersing a beam of white light. (
  • Its orb could be seen filtered through the thick snow clouds and an unusually vertical beam of light shot above and slightly below its position. (
  • Light verbs function by pairing with a word or words (usually, but not always, a noun or noun phrase) to achieve their meaning. (
  • Softboxes direct and diffuse the light as it passes through the screen. (
  • These fingerlike protrusions terminate in sandblasted crystal lobes which softly diffuse the light from enclosed LEDs. (
  • Polish developer Techland has announced that Dying Light: The Following - Enhanced Edition will be coming to PlayStation 4, Xbox One, and PC on February 9th, 2016. (
  • Dying Light: The Following - Enhanced Edition will be available from digital stores a. (
  • Dying Light is a first-person, action survival game set in a vast open world. (
  • Dying Light gradually and gratifyingly evolves into a fast, hyper-violent celebration of vertical freedom and zombie destruction. (
  • Techland's pedigree helps Dying Light become one of the better zombie games in recent years. (
  • Dying Light: The Following - Enhanced Edition is the quintessential open world zombie game. (
  • Fueled by the dedication of millions of fans who continue playing Dying Light, we've made supporting the game one of our priorities. (
  • Available DLCs include crossover weapon packs that let you enjoy Left 4 Dead 2, Chivalry: Medieval Warfare, and Unturned gear in Dying Light. (
  • We see light every day-whether from light bulbs, flames, flashlights, or the Sun (our most important source of light). (
  • Built in light bar has 3 light bulbs for easy viewing. (
  • Small levels of mercury in light bulbs can cause some health concerns. (
  • Energy-saving light bulbs are being pushed by power companies, eco-friendly organizations and the government. (
  • Low-mercury light bulbs are widely available. (
  • They work in much the same way that old bulbs did except they are more energy-efficient and produce a higher light. (
  • You might think light bulbs are a commodity, and to many, they are. (
  • This week we're looking at five of the best light bulbs to save you money around the house, or customize the lighting to your mood, based on your nominations. (
  • Not all light bulbs are alike. (
  • BeOn's line of smart home LED light bulbs are great lighting, sure, but they're really designed to improve your home safety and security. (
  • To save this item to your list of favorite Light Reading content so you can find it later in your Profile page, click the "Save It" button next to the item. (
  • His sensitivity to light, colour and space is the principal raison d'être of these paintings. (
  • Berkowitz's paintings, developing steadily over some 40 years of dedicated work, have, since the "Big Bend" paintings in the early '70s, blossomed into almost awe-inspiring beauty: great soaring clouds of pure light and color. (
  • Around the walls, and leaning their lofty heads toward the skylight, would be his ethereal paintings of light. (
  • All of my light paintings are straight out of the camera. (
  • [1] Visible light is usually defined as having wavelengths in the range of 400-700 nanometers (nm), or 4.00 × 10 −7 to 7.00 × 10 −7 m, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths). (
  • In physics , the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not. (
  • The study of light, known as optics , is an important research area in modern physics. (
  • Though it was not as epochal as his contributions to mechanics, Newton's work in optics, an area of physics that studies the production and propagation of light, was certainly significant. (
  • The main source of light on Earth is the Sun . Sunlight provides the energy that green plants use to create sugars mostly in the form of starches , which release energy into the living things that digest them. (
  • To address these challenges, NIOSH researchers developed the Saturn LED area light with the main objectives of reducing glare and increasing floor illumination to improve the ability of miners to see floor tripping hazards. (
  • Light contains all colors, more colors than the ones our human eyes perceive. (
  • Soundwaves act as a prism, separating colors from the light into a rainbow so to speak. (
  • As the light flows through, the needed colors stick to this empty space. (
  • To prove this, he directed a beam of white light through a prism, then allowed the diffused colors to enter another prism, at which point they recombined as white light. (
  • Newton gave to the array of colors in visible light the term spectrum, (plural, "spectra") meaning the continuous distribution of properties in an ordered arrangement across an unbroken range. (
  • Most of the times you see a firework of colors in space depending on the light around you, and the amount of pressure you press against the eyes. (
  • EMR in the visible light region consists of quanta (called photons ) that are at the lower end of the energies that are capable of causing electronic excitation within molecules, which leads to changes in the bonding or chemistry of the molecule. (
  • This loudspeaker consists of a light-weight magnetic circuit with a higher magnetic-flux utilization rate and a high-rigidity light-weight frame. (
  • One basic type of laser consists of a sealed tube, containing a pair of mirrors, and a laser medium that is excited by some form of energy to produce visible light, or invisible ultraviolet or infrared radiation. (
  • METRORail consists of three light-rail lines: The Red Line (North), Green Line (East End) and the Purple Line (Southeast). (
  • Today, the power of lasers, highly focused beams of high-intensity light, make possible a number of technologies used in everything from surgery to entertainment. (
  • It can be focused into a tight beam and can concentrate very high-intensity light at large distances from the laser. (
  • The study, released earlier this week , exposed breeding clownfish pairs to 12 hours of daylight followed by 12 hours under dim artificial lights. (
  • It appears that artificial lights can distract the young turtles from needed optical clues (e.g., the sky reflecting off the ocean) which would normally lead them to the sea shortly after hatching. (
  • One Light signed to Rexius Records in the summer of 2018. (
  • Organic Light Emitting Diodes (OLED) are a technology borrowed from liquid crystal displays. (
  • The primary properties of visible light are intensity , propagation direction, frequency or wavelength spectrum , and polarization , while its speed in a vacuum , 299,792,458 meters per second, is one of the fundamental constants of nature. (
  • Visible light, as with all types of electromagnetic radiation (EMR), is experimentally found to always move at this speed in a vacuum. (
  • The speed of light in a vacuum is defined to be exactly 299 792 458 m/s (approx. (
  • Some of the greatest unanswered questions about the nature of the universe are related to light, the vacuum (i.e. space where neither matter nor radiation exists), and their relationship with time. (
  • What is circadian-friendly: a light that is still white, but minimizes blue in its color spectrum. (
  • A softbox is a simple enclosure with a silver reflective interior and a white diffusion layer that goes over a light. (
  • The Saturn light used an array of 12 cool-white LEDs that provide lighting similar to natural daylight. (
  • 6 LED xenon white LED light, super bright LED provide maximum visibility and safety. (
  • Supposing you brought the light inside of the body, which you could do either through the skin or in some other way,' Trump said during the daily White House coronavirus task force briefing. (
  • From the deepest recesses of the ocean to hundreds of miles above earth, Canon's renowned imaging technology enables researchers, professional photographers, cinematographers and even astronauts to shoot impactful, clear, crisp imagery, even in extremely low-light conditions. (
  • In fact, in this study, the researchers found that impacts on clownfish reproduction disappeared as soon as they returned the clownfish to normal light-dark cycles. (
  • Researchers at the National Institute for Occupational Safety and Health (NIOSH) have developed the Saturn LED area light that significantly improves illumination for roof bolting machines in underground mines, thereby enhancing safety by reducing injuries to miners. (
  • An international collaboration of researchers has recently made a breakthrough in remotely controlling meta-atoms by illuminating them with a pattern of visible light. (
  • In an effort to assess the magnitude of the light pollution problem, a comprehensive World Atlas of Artificial Night Sky Brightness was produced in 2001 by researchers at the University of Padua , Italy, and the National Oceanic and Atmospheric Administration (NOAA). (
  • Researchers also say they can use light commands. (
  • Ted Ducker, who goes by Outabounds on Flickr, has a simpler approach to light painting than Dennis Calvert (will link to Dennis Calvert slideshow). (
  • I'm talking about the experiments of Alan Jaras, a "light photographer", on flickr. (
  • exactly one year later Construction is quickly progressing on the $912 million facility, which will be the world's most brilliant light source. (
  • For light that cannot be seen with human eye, see Electromagnetic radiation . (
  • Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that can be perceived by the human eye . (
  • Like all types of EM radiation, visible light propagates as waves. (
  • Light is a form of energy called electromagnetic radiation. (
  • The human eye can typically detect radiation (light) in the wavelength range of about 400 to 750 nanometers . (
  • She stood for a moment holding her skirt above the grimy steps, [ … ] , and the light of the reflector fell full upon her. (
  • One of the most versatile and cost-effective light modifiers you can pick up is a 5-in-1 reflector kit. (
  • Or if you want to diffuse harsh light, simply unzip the reflector layer and position the diffuser in between your subject and the light source. (
  • While the lasers themselves can cause injuries, laser light shows that are produced in accordance with FDA regulations keep hazardous lasers away from the audience. (
  • For instance, direct sunlight on a cloudless afternoon is hard light. (
  • Polymorphic light eruption is a fairly common skin rash triggered by exposure to sunlight or artificial ultraviolet (UV) light. (
  • Prickly heat is caused by warm weather or overheating, rather than sunlight or UV light. (
  • Plant growth is also affected by the colour spectrum of light, a process known as photomorphogenesis. (
  • A single area of light pollution could lead to impacts to surrounding reefs that are still relatively dark at night. (
  • Impacts of artificial light could spread to other reefs, while attracting young fish to an environment where their young likely won't hatch. (
  • Regulations on the type of light and orientation (facing down, rather than out), may help reduce impacts of light pollution on clownfish and other marine species. (
  • [2] Because it includes the word " year ", the term light-year is sometimes misinterpreted as a unit of time. (
  • [20] He recognized that his readers would enjoy the mental picture of the approximate transit time for light, but he refrained from using the light-year as a unit. (
  • The cells absorb the light, which accelerates tissue repair and speeds up recovery time. (
  • As consciousness is acquired and the body prepared (I will add specific information about this later on as I get the time) the light will no longer have blockages (will write about those too) to go through in order to reach the human body. (
  • He concluded that when Io was farther away, it was taking more time for its light to reach Earth, making it seem to appear later. (
  • Having developed the light using proven scientific principles, we hope to bring healthy illumination for night-time tasks. (
  • The idea was born out of the need to have a better, more patient-friendly night-time illumination for caregivers in hospital rooms (notorious for poor sleep and vulnerable to light disruption). (
  • At the foot of the pier stands a bridge that is only wide enough for a single car at a time, and drivers take turns with no light to direct them (apparently, Kronstadt only has one traffic light on the entire island). (
  • Those of you who nominated the LIFX noted that it's incredibly versatile, and since you can control the lighting in your home from your smartphone at any time, you can have the lights up in your home before you open the door, program different areas of your home to suit your tastes, and that the mobile apps are available for both iOS and Android, which is a nice perk. (
  • It lights instantly with power, so no warm-up time required. (
  • The University of Queensland) =============================================================== Like watching a movie in reverse, physicists have just demonstrated a new technique for the time-reversal of a wave of optical light. (
  • It's the first time that time reversal of optical waves has been achieved with full control over all of the degrees of freedom of light simultaneously. (
  • These light levels simulate the artificial light exposure of near-shore reef communities, such as reefs just offshore a small city. (
  • Again, like all of Calvert's images, this effect was created entirely by playing with a long exposure and moving various lights around. (
  • People with polymorphic light eruption are at greater risk of vitamin D deficiency, as a certain amount of sun exposure is needed to make your own vitamin D . Your GP will advise whether you need treatment with vitamin D supplements. (
  • An ordinary light switch provides an example of a situation in which there is an excluded middle: there is nothing between "on" and "off. (
  • A Web developer in Culmann, Ala. (dry since Prohibition, Calvert tells me, until just recently), he found the tools he needed for his new hobby in the local Wal-Mart's camping and automotive sections: glow sticks, flashlights, electric tent lights, and other devices used by Alabamans to trick out their dashboards. (
  • Many animals with eyes that do not require lenses (such as insects and shrimp) are able to detect ultraviolet, by quantum photon-absorption mechanisms, in much the same chemical way that humans detect visible light. (
  • The light-year unit appeared a few years after the first successful measurement of the distance to a star other than the Sun, by Friedrich Bessel in 1838. (
  • Bessel added that light employs 10.3 years to traverse this distance. (
  • He may have resented expressing distances in light-years because it would deteriorate the accuracy of his parallax data due to multiplying with the uncertain parameter of the speed of light. (
  • The closest star to our Sun, Proxima Centauri, is about four light-years away. (
  • Magoon's governorship in Cuba was viewed in a negative light by many Cuban historians for years thereafter. (
  • Alpha Centauri and Proxima Centauri, the stars nearest our solar system, are about 4.3 light-years distant. (
  • Although physicists had known for 50 years that under some conditions concentrated sound could produce flashes of light, it wasn't until a few years ago that Putterman's group put the topic back in the scientific forefront. (
  • Calvert began experimenting with light only about two years ago. (
  • Like many of those now regarded as masters, he's only been playing with light for about two years. (
  • Her hair is black as the inmost secret of light in a perfectly cut diamond, a perilous black, a secret light that must have been studied for many years before the anxious and disciplined craftsman could achieve the necessary balance between courage and skill to stroke the strange stone and take the one chance he would ever have to bring that secret to light. (
  • Wish you could visit the Spook Light but can't make the drive? (
  • But some materials (like air, glass, or water) can actually make light bend and slow down. (
  • Below, we'll look at some examples using four particularly common light verbs that have a variety of different meanings- do, make, get , and take . (
  • There's no need to avoid outdoor shoots or midday shoots to make diffused light images, however. (
  • You don't need a lot of equipment to make soft light," says Gaskins. (
  • To make it worse, the light then usually turns on anyway. (
  • They also make a great addition to your at-home emergency kit - keeping the light on even when the power goes out. (
  • Suddenly, in the center of the globe, you can just make out a steady blue light shining like a tiny star. (
  • So, for sound to make light requires an almost unbelievable concentration of energy. (
  • The light can trick microphones and make the devices react as if they are receiving audio. (
  • One of the coolest ideas is to make sweet light graffiti with this camera option. (
  • Visit Real Spook Light on Facebook , Twitter , and YouTube you can also contact the Real Spook Light by messaging us on facebook with any questions, comments, corrections or additions. (
  • Visit the Real Spook Light on Facebook for updates and discussions managed from 10 miles Southeast of Spook Light Road. (
  • Historically, another important source of light for humans has been fire , from ancient campfires to modern kerosene lamps . (
  • The roof bolter light sources were compact fluorescent lamps shrouded by yellowish-orange polycarbonate globes intended to reduce glare and to protect the lamps. (
  • this is wasted light reflecting off the water particles that form clouds. (
  • Even without clouds, light shoots into the sky and reflects off of tiny airborne dust and moisture particles. (
  • Hard light, or direct light, creates high-contrast scenes with harsh shadows and sharp, bright highlights. (
  • You can take this light we use to perceive the whole world and bend it in a way that creates science fiction and pure fantasy," he says. (
  • However, as a research team from TU Wien (Vienna) and Utrecht University (Netherlands) has now been able to show, there is a class of very special light waves for which this does not apply: for any specific disordered medium-such as the sugar cube you may just have put in your coffee-tailor-made light beams can be constructed that are practically not changed by this medium, but only attenuated. (
  • In the early 17th century, Galileo tried to measure the speed of light by flashing lanterns from hilltops about one mile apart. (
  • Our solar-powered lanterns and solar home systems provide light to over 80 million people. (
  • There are some pretty good pictures out there of this effect, and some feature blurred, colorful lights, which are just beautiful. (
  • d.light is a global leader in affordable solar lighting solutions for off-grid communities. (
  • Whatever the adventure, your d.light solar-powered lantern can handle it. (
  • Wisdom thinks, and makes a solar Drummond Light of a point of dull lime. (
  • The light which puts out our eyes is darkness to us. (
  • He ``hath called you out of darkness into his marvellous light'' is what I thought. (
  • Jesus said, ``I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life. (
  • Mary Baker Eddy, the Discoverer and Founder of Christian Science, writes, ``Christianity causes men to turn naturally from matter to Spirit, as the flower turns from darkness to light. (
  • The Air Force issued its request for proposal to acquire a fleet of turboprop aircraft as part of its light attack effort. (
  • The new commander of SOCOM wants light attack aircraft to back his forces on the ground. (
  • The Air Force was supposed to publish a final RFP in December for a light attack aircraft, but it never happened. (
  • The U.S. Air Force has taken the initial steps to buy commercial, off-the-shelf aircraft for its light attack fleet. (
  • This Sources Sought Synopsis focused solely on the need to explore cost-effective acquisition options to provide a productionized, weaponized, certified, and existing single-engine, turbo-prop, tandem-seat, pressurized, retractable tricycle gear Advanced Flight Trainer / Light Attack Aircraft (AFT/LAA) capability for ANAAC. (
  • In April 2010, the US Air Force announced its intention to acquire a Light Air Support (LAS) aircraft for use by the Afghanistan National Army Air Corps (ANAAC) and other future customers. (
  • The purpose of the contract was the acquisition of non-developmental Light Air Support Aircraft (LAS) for existing and future building partnership capacity nations. (
  • Light painting spreads more easily than the zombie virus. (
  • For example, you can set your bathroom to soothing, dimmer light, and your office with brighter, more energetic lighting if you prefer. (
  • American Light makes a fresh and comprehensive examination of the culminating phase of Hudson River painting, now commonly called luminism. (
  • Nearby shorter and longer wavelength ranges, although not visible, are commonly called ultraviolet and infrared light. (
  • Visible light" redirects here. (
  • At the lower end of the visible light spectrum, EMR becomes invisible to humans (infrared) because its photons no longer have enough individual energy to cause a lasting molecular change (a change in conformation) in the visual molecule retinal in the human retina, which change triggers the sensation of vision. (
  • Various sources define visible light as narrowly as 420-680 nm to as broadly as 380-800 nm. (
  • Light exists along a relatively narrow bandwidth of the electromagnetic spectrum, and the region of visible light is more narrow still. (
  • ants in fact do use polarized light as a compass, augmenting the pedometric function of their legs. (
  • Either can be used as a directional light (light that hits a subject at an angle other than 90 or 270 degrees), but when a soft light source hits a subject from a lower angle it leads to lower-contrast images - and produces scenes with softer shadows and highlights. (
  • While it may seem illogical, "the closer a light source is to your subject, the softer it becomes," says Gaskins. (
  • Construction on Brookhaven's National Synchrotron Light Source II (NSLS-II) -- which will allow scientists to explore everything from fuel cell catalysts and soil samples to molecules vital for human life -- has passed the 50-percent completion mark. (
  • A little more than one year ago, on the day of its groundbreaking ceremony, the National Synchrotron Light Source II (NSLS-II) construction site was nothing more than a whole lot of dirt. (
  • Eh, what's a "light source? (
  • c. 965-1039), sometimes called the greatest scientist of the Middle Ages , showed that light comes from a source such as the Sun , and reflects from an object to the eyes. (
  • That connection between the source of this light and the focus of our lives is important. (
  • and his rich legacy of truth can be to us an eternal source of light and healing in our own lives. (
  • Sonoluminescence literally means "sound into light," and the mysterious phenomenon serves as a central plot device in the film, in which Keanu Reeves plays a student who stumbles upon a limitless source of energy. (