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searching for Density gradient 153 found (169 total)

alternate case: density gradient

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simple pelleting tasks are carried out in fixed angle rotors. Some density-gradient work for purifying cells and organelles can be carried out in swinging-bucket

density centrifugation (also isopycnic centrifugation or equilibrium density-gradient centrifugation) uses the concept of buoyancy to separate molecules

purifications may be done on the basis of density through equilibrium density-gradient centrifugation. Thus, the differential centrifugation method is the

A pycnocline is the cline or layer where the density gradient (∂ρ/∂z) is greatest within a body of water. An ocean current is generated by the forces such

used to prepare dense aqueous solutions for use in isopycnic (or "density-gradient") centrifugation. It is isostructural with potassium salt. Coordination

Metrizamide is a non-ionic iodine-based radiocontrast agent. It is also a density gradient medium for the centrifugation of biological particles. Historically

mineralogy, for density gradient centrifugation and for separating mixtures. Common applications of heavy liquids include: Density gradient centrifugation

the density gradient. At a density ratio of 1, temperature and salinity are said to be compensated: their density signatures cancel, leaving a density gradient

coated with polyvinylpyrrolidone (PVP). Percoll is well suited for density gradient experiments because it possesses a low viscosity compared to alternatives

visualization index based in the Electron density (ρ) and the reduced density gradient (s). It is based on the empirical observation that Non-covalent interactions

(February 9, 1913 – July 7, 1976) was an American biochemist who developed density gradient ultracentrifugation and analytical band centrifugation, and contributed

produce "heavy liquid" for gravity separation (sink /float analysis) and density gradient centrifugation. It has significant advantages when compared to zinc

Retrieved 19 November 2015. "Nycodenz®: A universal density gradient medium" (PDF). Axis-Shield Density Gradient Media. Archived from the original (PDF) on 26

Analytical ultracentrifugation is an analytical technique which combines an ultracentrifuge with optical monitoring systems. In an analytical ultracentrifuge

of trapped particles (which practically lie on poloidal plane) and density gradient: the poloidal current due to trapped particles motion is unbalanced

isotonic conditions and subsequent fractionation using differential and density gradient centrifugation. Liquid shear detaches the nerve terminals from the

their density. Isopycnic centrifugation refers to a method wherein a density gradient is either pre-formed or forms during high speed centrifugation. After

around a planet of sufficient size and with sufficient atmospheric density gradient. Sinking is the opposite of looming. In sinking, stationary objects

followed by Western blotting, size exclusion chromatography, sucrose density gradient sedimentation or mass spectrometry. Suchanek, M.; Radzikowska, A.;

to look for. With high speed buoyant density ultracentrifugation, a density gradient is created with caesium chloride in water. DNA will go to the density

Thames. The area uses around 4 gigawatts of electricity power. The density gradient of industrialising cities has tended to follow a specific pattern:

microbiologist who is primarily known for the development of sucrose density-gradient centrifugation as well as his work on viruses and macromolecules. He

neurons throughout the body occurs by a density gradient along the proximal-distal axis. The density gradient goes from high to low from the proximal

radiation zone is stable against formation of convection cells if the density gradient is high enough, so that an element moving upwards has its density lowered

observed using bacterial DNA; monitoring absorbance-temperature curves, density-gradient ultracentrifugation and by direct inspection using electron microscopy

Technology (1953-1957), Meselson's doctoral dissertation was on equilibrium density gradient centrifugation and on x-ray crystallography. Besides Pauling, Meselson's

have been used to sort sperm before the advent of flow cytometry. Density gradient centrifugation (in a continuous or discontinuous gradient) can concentrate

co-fractionates with a protein complex larger than PSI upon sucrose density gradient centrifugation of solubilised thylakoids. The Ycf3 protein is loosely

co-fractionates with a protein complex larger than PSI upon sucrose density gradient centrifugation of solubilised thylakoids. Ycf is an acronym standing

of the North Basin. The saline surface water then sinks along the density gradient to replenish the deep bottom waters of the North Basin (Francus and

method is distinguished from zone-sedimentation in that a stabilizing density gradient is self-generated during centrifugation, through the use of a higher

{\displaystyle \Gamma _{w}} is the density gradient of the wetting phase Γ n w {\displaystyle \Gamma _{nw}} is the density gradient of the non-wetting phase Microfluidics

compositional non-uniformity of vertebrate genomes using thermal melting and density gradient centrifugation. The DNA fragments extracted by the gradient centrifugation

mechanical dissociation of brain tissue samples into single cells, density gradient centrifugation and filtration to isolate nuclei of microvessels,

University. The process through which these technologies emerged is called Density Gradient Ultracentrifugation (DGU). DGU has been used for some time in biological

diffusing material in any part of the system is proportional to the local density gradient: j = − D ( ϕ , r ) ∇ ϕ ( r , t ) . {\displaystyle \mathbf {j} =-D(\phi

278, No. 44, Issue of October 31, pp. 42785–42794, 2003. Improved density gradient separation techniques using Sodium Polytungstate and a comparison to

gradient of refractivity normal to the path, which in turn depends on the density gradient. The effect is most pronounced when the radiation traverses a long

archive.org/web/20160825063320/http://www.cosmobiousa.com/axis-shield-density-gradient-optiprep.html http://www3.gehealthcare.com/en/products/categories/

refractive index gradient The index gradient is directly related to flow density gradient. The deflected light is compared to undeflected light at a viewing

zero frequency and a sinusoidal structure in the direction of the density gradient; they effectively lead to a continuous change in upstream conditions

order to reach equilibrium within a system that has an established density gradient (see Rayleigh–Taylor instability). To reach equilibrium, parcels from

electrons the diffusive current is in the same direction as the electron density gradient because the minus sign from the negative charge and Fick's Law cancel

phospholipids were found in roughly equal amounts following a sucrose density gradient centrifugation. In addition, it was found that spherosomes may also

Concerning electron density topology, recent methods based on electron density gradient methods have emerged recently, notably with the development of IBSI

indicates that the galaxy cluster's dark halo has a shallow inner density gradient and perhaps a soft dark matter core. At face value, this is incompatible

the cupula and the surrounding endolymph. The result is a temporary density gradient between the cupula and endolymph, and a consequent (erroneous) sensitivity

DNA is extracted from these cells and centrifuged on a salt (CsCl) density gradient, the DNA separates out at the point at which its density equals that

baroclinic vorticity generation, which occurs whenever there is a density gradient along surfaces of constant pressure. Baroclinic flows can be contrasted

azeotropic mixtures of simple fluids: Molecular dynamics simulation and density gradient theory". The Journal of Chemical Physics. 157 (12): 124702. doi:10

it possible to obtain a first estimate of the solar corona electron density gradient, the solar wind speed and density inhomogeneities in the solar corona

other alteration in between, and provided that they are separated by density gradient centrifugation or swim-up before use in assisted reproduction technology

González D, Ortiz A, García JF, Rodríguez AB, Pariente JA (2009). "Density gradient capacitation is the most suitable method to improve fertilization and

showed a distinct buoyant density, detectable as a "satellite peak" in density gradient centrifugation, and that was subsequently identified as large centromeric

This theory described different aether densities, creating an aether density gradient. His theory also explains that aether was dense within objects and

large-scale technological processes. The most efficient method relies on density-gradient ultracentrifugation, which separates surfactant-wrapped nanotubes by

DP. (2006) Sinking velocities of phytoplankton measured on a stable density gradient by laser scanning. Journal of the Royal Society Interface, The Royal

CK20, and TEM-8 in colorectal carcinoma patients using OncoQuick density gradient centrifugation system". J. Surg. Res. 155 (2): 183–90. doi:10.1016/j

for several hours in dense solutions of sugars or salts that form a density gradient, from low to high, in the tube during the centrifugation. In some cases

instability. Baroclinic instability is induced by the large horizontal density gradient in the WGC near the bottom. The misalignment of surfaces of equal pressure

as detected by the Voyager 1 and Voyager 2; this implies that "the density gradient is a large-scale feature of the VLISM (very local interstellar medium)

space probes. According to the researchers, this implies that "the density gradient is a large-scale feature of the VLISM (very local interstellar medium)

space probes. According to the researchers, this implies that "the density gradient is a large-scale feature of the VLISM (very local interstellar medium)

accomplished through diameter and electronic sorting of CNTs through a density gradient ultracentrifugation (DGU) process, involving a gradient of surfactants

space probes. According to the researchers, this implies that "the density gradient is a large-scale feature of the VLISM (very local interstellar medium)

PV, Tsanev RG (November 1966). "Ribonucleic acids fractionation by density-gradient centrifugation and by agar gel electrophoresis: a comparison". Analytical

Navier–Stokes equation, in presence of gravity g {\displaystyle g} and a mean density gradient (with gradient-length L ρ {\displaystyle L_{\rho }} ), for the perturbation

be obtained. Density gradient centrifugation is also another method for selecting flakes based on lateral size, where a density gradient is employed in

beat Watson; has a patent for a "method for maintaining a correct density gradient in a non-convecting solar pond" Luke Howard – meteorologist known for

Concentration of P. falciparum-infected erythrocytes by discontinuous density gradient centrifugation in Percoll.

post-reorientation configurations with cells moving towards the cell density gradient. Since an exact treatment of a stochastic agent-based model quickly

gene in reverse orientations which had been separated by a poly U,G density-gradient technique, were annealed to form double-stranded DNA. The single-stranded

Ortiz, A.; García, J.F.; Rodríguez, A.B.; Pariente, J.A. (2009). "Density gradient capacitation is the most suitable method to improve fertilization and

place in a laboratory following sperm donation. Sperm may be washed by density gradient centrifugation or by a "direct swim-up" technique that does not involve

etc.) can be isolated by precise high-speed centrifugation in the density gradient. Using osmotic shock, it is possible temporarily open vesicles (filling

particle when under the influence of a strong electromagnetic energy density gradient to accelerate plasma electrons and ions in the same direction, thereby

SurePath method, the sample is vortexed, strained, layered onto a density gradient, and centrifuged. Instruments required are a computer-controlled robotic

methods have been developed to purify them including polymer-assisted, density gradient ultracentrifugation (DGU), chromatography and aqueous two-phase extraction

north and warmer and lighter in the south. This sets up a horizontal density gradient. Earth’s rotation maintains this gradient by preventing the dense water

will appear as rolls or a superposition of them. Since there is a density gradient between the top and the bottom plate, gravity acts trying to pull the

concentration, so for holes a negative current results for a positive density gradient. (If the carriers are electrons, the hole density p is replaced by

13g/mL and the nucleocapsid has a density of 1.17g/mL in a sucrose density gradient. LDV has been shown to mature by budding through the intracytoplasmic

time points. These samples were then subjected to centrifugation in a density gradient, which separated the DNA molecules based on their density. The results

granular lymphocytes known today as NK cells. The demonstration that density gradient-isolated large granular lymphocytes were responsible for human NK activity

region where temperature gradients exceed 1 °C/m. Due to the stable density gradient, mixing is inhibited within the thermocline, which reduces the vertical

typically ranges from 3–9 Sv. ISOW is produced in proportion to the density gradient across the Iceland-Scotland Ridge and as such is sensitive to LSW production

"James F. Fowler, & Barb Smith. 2010. Erigeron mancus elevational density gradient as a baseline to detect future climate change in LaSal Mountain habitats

gradient of sugar (typically sucrose, glycerol, or a silica based density gradient media, like Percoll)—is generated in a tube such that the highest concentration

and also in a liquid of known density. A column of liquid with a density gradient can also be prepared: The column should contain a liquid of continuously

replication and genetic recombination. These studies utilized the method of density gradient centrifugation that was developed for the test of the semiconservative

improvements can be made when the conductive particulates are layered in a density gradient, so the tip of the pyramid has the lowest percentage of particles and

in several categories – age of the vines, altitude, aspect, vine density, gradient, granite content of the soil, schist content of the soil, types of

González D, Ortiz A, García JF, Rodríguez AB, Pariente JA (2009). "Density gradient capacitation is the most suitable method to improve fertilization and

diamagnetic drift now becomes whole plasma flux which is proportional to the density gradient since the diamagnetic drift includes pressure gradient. The diamagnetic

chloride, zinc sulfate, sucrose, Percoll, Ficoll-Hypaque, or other such density gradient media is preferred to formalin-ethyl acetate or other sedimentation

bitmap-based 3D printing approach thus faithfully reproduces the subtle density gradient distribution within molecular clouds in a tangible, intuitive, and

Flenley JR (1993). "Pollen purification and fractionation by equilibrium density gradient centrifugation". Palynology. 17 (1): 137–55. Bibcode:1993Paly...17

45.566. S2CID 55620379. Oliver, G. L.; Perdew, J. P. (1979). "Spin-density gradient expansion for the kinetic energy". Phys. Rev. A. 20 (2): 397–403. Bibcode:1979PhRvA

isopycnic centrifugation. Centripetal and diffusive forces establish a density gradient that allow separation of mixtures on the basis of their molecular density

Rao, Shanta S. (September 1977). "Use of Ficoll–sodium metrizoate density gradient to separate human X- and Y-bearing spermatozoa". Nature. 269 (5623):

both terms are comparable to the nonlinear term. The unperturbed density gradient can also be just as small as the normalized electric potential and

the University of Toronto Innovations Foundation. Cedarlane sells density-gradient cell separation media under the Lympholyte trade name. Cedarlane offers

González D, Ortiz A, García JF, Rodríguez AB, Pariente JA (2009). "Density gradient capacitation is the most suitable method to improve fertilization and

caesium trifluoroacetate (Cs(O 2CCF 3)) useful in molecular biology for density gradient ultracentrifugation. This technology is used primarily in the isolation

flashes are enhanced by atmospheric inversions which increase the density gradient in the atmosphere, and therefore increase refraction. In other words

Blevins, B.A., de la Rey, M. and Loskutoff, N.M. (2008)  Effect of density gradient centrifugation with trypsin on the fertilizing capability of bovine

is a key factor. Alternatively, post-synthetic protocols, such as density gradient ultracentrifugation, can be used to narrow the size distribution through

fluorescent protein for biological imaging Jerome Vinograd — developed density gradient ultracentrifugation Steven Vogel — biomechanics Mikhail Volkenshtein

to molecules from above, and minus sign below. Note that the number density gradient d n / d y {\displaystyle dn/dy} can be considered to be constant over

faces. This was previously explained as stemming from a more clustered density-gradient for other-race faces than same race faces. The reasoning is that this

punches from both ends of the toolset in order to reduce the level of density gradient within the compact. Ejection of the compact from the die, using the

1007/BF00155342. S2CID 118512625. 4,249,518 Method for maintaining a correct density gradient in a non-convecting solar pond 1996 Holt first ran for Congress in

approaches have been used, including differential ultracentrifugation, density gradient ultracentrifugation, size exclusion chromatography, ultrafiltration

by the father of hydrogen exchange Kaj Ulrik Linderstrøm-Lang using density gradient tubes. In modern times, H–D exchange has primarily been monitored by

“long, continuous structure with a well-defined velocity and column density gradient.” The velocity at the tip of the Magellanic Stream is hypothesized

organization of the brush border in intestinal epithelial cells I. Tris density gradient disruption of isolated hamster brush borders and separation of fractions"

of Illinois at Urbana-Champaign University of Cambridge Known for Density Gradient Ultracentrifugation (DGU) of carbon nanotubes Contributions in the

Scott AM, et al. (February 2012). "Comparison of ultracentrifugation, density gradient separation, and immunoaffinity capture methods for isolating human

rigidity dependence[citation needed] Precision measurement of the density gradient of cosmic rays in the solar system by probing Swinson flow[citation

filamenting femtosecond laser pulses in a square arrangement to produce a density gradient in air which acted as an optical waveguide lasting on the order of

techniques, as well as the use of temperature gradients to define a density gradient. This is somewhat counterintuitive as temperature does not play a role

{\displaystyle g=2} gyromagnetic ratio of the electron. In other words, a spin-density gradient is twice as effective at making an electric current as it is at contributing

different chiralities stuck together due to van der Waals attraction. Density gradient ultracentrifugation (DGU) has recently been used to get rid of this

depth. Instead of a vertical gradient, the bay shows a horizontal density gradient, with fresh water entering from the drainage canals on the west side

baroclinity A measure of the misalignment between a pressure gradient and a density gradient in a stratified fluid such as the atmosphere. In the context of meteorology

racemate from excess enantiomer of chiral nonracemic compounds via density gradient ultracentrifugation. Journal of the American Chemical Society 2008

160.750.300 – fetal weight MeSH E05.181.724.336 – centrifugation, density gradient MeSH E05.181.724.336.253 – centrifugation, isopycnic MeSH E05.181.724

Cytocompatible Carbon dot Synthesis and its Separation Using Sucrose Density Gradient Centrifugation". Journal of Fluorescence. 25 (1): 9–14. doi:10.1007/s10895-014-1477-x

E. coli. Purification before culturing can be accomplished by CsCl density gradient centrifugation. Renaudin, J; Aullo, P; Vignault, JC; Bové, JM (1990)

surrounding solution than in the interparticle region. The resulting density gradient gives rise to an osmotic pressure that is anisotropic in nature, acting

that may be present. (At extreme rates of radiative mass loss, the density gradient of lofted material may become continuous enough that a meaningfully

Carol (2015-10-20). "Delayed settling of marine snow: Effects of density gradient and particle properties and implications for carbon cycling". Marine

elements, Reinhold, New York, pp. 432–7 Hinton H & Dobrota N 1978, 'Density gradient centrifugation', in TS Work & E Work (eds), Laboratory techniques in

Lennard-Jones Truncated and Shifted Fluid: Comparison of Molecular Simulation, Density Gradient Theory, and Density Functional Theory". The Journal of Physical Chemistry

The associated buoyancy forcing enhances the Atlantic meridional density gradient giving rise to the North Atlantic Deep Water (NADW) formation which

Kurth, W.S.; Gurnett, D.A. (25 August 2020). "Observations of a Radial Density Gradient in the Very Local Interstellar Medium by Voyager 2". The Astrophysical

concentration of living dinoflagellate resting cysts from marine sediments via density-gradient centrifugation;". Limnology and Oceanography. 36 (3): 588–592. Bibcode:1991LimOc

convection regime. This current must be in thermal wind balance with the density gradient between the chimney’s interior and exterior. The width of the rim current’s

PMID 1054532. Horáková, K; Fusková, A; Ceglédyová, N (1976). "Sacharose density gradient separation of Ehrlich ascites carcinoma and L-5178Y tumor cells in

relative contributions of temperature and salinity in determining the density gradient in a seawater column Dynamic topography – Elevation changes caused

interactions depicted in the Dewar-Chatt-Duncanson model. QTAIM, RDG (Reduced Density Gradient), and DORI (Density Overlap Regions Indicator) approaches also suggest

complete absence of emission in the eastern part indicates a strong density gradient of the interstellar medium where Kesteven 75 expands. The central component

Stylized Urban Density Gradient

and stroma. Unwanted cells were isolated through the process of a density gradient. After this process, the removal of hematopoietic stem cells and nonadherent

cells (PBMC) are harvested from the blood sample using a Ficoll-Paque® density gradient. The PBMC's are washed using a phosphate-buffered saline (PBS) and

R. (2021) Home range variation in leopards living across the human density gradient. Journal of Mammalogy. 102 (4), 1138–1148. doi.org/10.1093/jmammal/gyab068

the Endoplasmic Reticulum: Analysis by Two-Phase Partitioning and Density-Gradient Centrifugation". Ethylene Signaling. Methods in Molecular Biology.

warm due to transport. The SST is directly linked to the horizontal density gradient which is really strong at fronts and is induced by ocean currents and

f {\displaystyle f} the Coriolis parameter. Therefore a horizontal density gradient in the y {\displaystyle y} -direction ( ∂ ρ ∂ y ) {\displaystyle \left({\frac

have, instead, a boundary layer of suspended sediments with a broad density gradient instead of a discrete transition point. This condition has a fundamental

liquid pycnometer method and titration method ISO 1183-2:2019 Part 2: Density gradient column method ISO 1183-3:1999 Part 3: Gas pyknometer method ISO 1184:1983

thermohaline forcing and turbulent mixing. Thermohaline forcing refers to density-gradient driven motions, whereby density is determined by the temperature (‘thermo’)

space probes. According to the researchers, this implies that "the density gradient is a large-scale feature of the VLISM (very local interstellar medium)