A Unified Theory of Friction

Sargent, L. B.

doi:10.1080/05698197408981440

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…These subunits are homologous to the extent of 32-50% for different pairs within one species and descent from a single ancestral subunit fits well with the observed differences (Kubo et al, 1985). A large number of monoclonal antibodies has been raised against the purified nicotinic acetylcholine receptor (native or denatured) but only a small fraction ( < 5 %) recognize strongly more than one of its subunit types (Sargent et al, 1984;Lindstrom, 1984). So far, of 23 monoclonal antibodies to the GABAA receptor known to us or reported upon, only the 1A6 described herein shows intersubunit cross-reactivity.…”

Section: Discussionmentioning

confidence: 92%

“…wt of the isolated protein was -230 000 (Stephenson et al, 1986b (Chang and Barnard, 1982 (Kubo et al, 1985). A large number of monoclonal antibodies has been raised against the purified nicotinic acetylcholine receptor (native or denatured) but only a small fraction ( < 5 %) recognize strongly more than one of its subunit types (Sargent et al, 1984;Lindstrom, 1984). So recently, the ( subunit as the polypeptide that carries the binding site for GABA (Casalotti et al, 1986), it is now possible to correlate the distribution of the respective binding sites with the a2(32 structure.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The GABAA/benzodiazepine receptor is a heterotetramer of homologous alpha and beta subunits.

C¹,

Stephenson²,

Barnard³

1987

The EMBO Journal

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The GABAA receptor has been purified to homogeneity from bovine cerebral cortex. Under stringent conditions of isolation, the GABAA receptor was shown to consist only of a (Mr 53 000) and j3 (Mr 57 000) subunits. A densitometric scan of SDS-PAGE gels under reducing conditions showed that these subunits were present in a 1:1 ratio. A model of the receptor as a heterologous tetramer x2,32 iS proposed. Monoclonal antibodies have been raised to the purified bovine GABAA receptor. One of these antibodies, 1A6, was shown to react with both the a and ( subunits of the purified receptor. The subunits were still positive in immunoblots following the removal of the carbohydrate moieties of the respective polypeptides by endoglycosidase F treatment. This antibody has been employed to demonstrate antigenic cross-reactivity between the GABAA receptors of three vertebrate species. It is further proposed that there is partial amino acid sequence homology between the a and (3 polypeptides and hence that they are derived from a single ancestral gene.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

The GABAA/benzodiazepine receptor is a heterotetramer of homologous alpha and beta subunits.

C¹,

Stephenson²,

Barnard³

1987

The EMBO Journal

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“…This departure from the Hubble flow causes the observed clustering distribution in redshift surveys to be statistically anisotropic. On large scales, the clustering pattern is compressed along the line-of-sight (the "squashing effect") by coherent infall onto galaxy clusters and superclusters and outflow from voids and other underdense regions (Sargent & Turner 1977). On small scales, the velocity dispersion of virialized clusters creates the so-called "fingers of god" (FOG) by stretching out these structures along the line-of-sight (Jackson 1972).…”

Section: Introductionmentioning

confidence: 99%

The Bispectrum as a Signature of Gravitational Instability in Redshift Space

Scoccimarro¹,

Couchman

Frieman

1999

ApJ

286

434

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The bispectrum provides a characteristic signature of gravitational instability that can be used to probe the Gaussianity of the initial conditions and the bias of the galaxy distribution. We study how this signature is affected by redshift distortions using perturbation theory and highresolution numerical simulations. We obtain perturbative results for the multipole expansion of the redshift-space bispectrum which provide a natural way to break the degeneracy between bias and Ω present in measurements of the redshift-space power spectrum. We propose a phenomenological model that incorporates the perturbative results and also describes the bispectrum in the transition to the non-linear regime. We stress the importance of non-linear effects and show that inaccurate treatment of these can lead to significant discrepancies in the determination of bias from galaxy redshift surveys. At small scales we find that the bispectrum monopole exhibits a strong configuration dependence that reflects the velocity dispersion of clusters. Therefore, the hierarchical model for the three-point function does not hold in redshift-space.

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“…I;irst, a Illore ;~ccur;~tc cons~itutive equation is proposecl to ;~l~l~r o x i m ;~t e the Bair Xc Winer model in the usual visco-~)l;lstic region with less error. Second, in order to make a ~i l o r c rc;~listic ~~r~d i c t i o n , a new viscosity-pressure expresh i 0 1 1 11;ised o n tlie experimental observation (9) has been i~~troclticccl into the calculations combined with the viscositytcllll)c";lturc inlluencc. Fr~rthermore, with the more powc~.l'~tl conll)lltcr (113M 43(iI), a smaller increment has been IISCCI to get 111orc accurate numerical results.…”

Section: The Influence Of Lubricant Visco-plastic Character On the LImentioning

confidence: 99%

The Influence of Lubricant Visco-Plastic Character on the Line Contact EHL Under High Sliding Speeds

Wang

Zhang

Wang

1991

Tribology Transactions

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A,S b 4 C CI .C:n I1 K 1 , I: 2 b; ' C It 110 Ill, 1-1 Hanit, H~.n>itl h' h'o K 1 4 2 L P p11.111:Ix I ' Q1.Q' = ~wcssure-viscosity coefficients = semiwitlth ol' tlertzian contact (111) = coeflicicnt of friction = specific hcat of lubricant (Jkg-I "C-I) = spccilic hcat of slide-roll botlies (j kg-' "C-I ) = tliameter of roller (m) = moduli of el;~st.ic botlies (Nm-') = effective elastic motlulus of slicle-roll bodies E' = 2ElE2/[E2(I -6 : ) + E l ( I .-(NIT]-') = non-tlimcnsion:~l 11i;lterial par;tnicter (G = aE') = film thickness (m) = central lil~n thickness (m) = exit filtn thickness (tn) = non-tlirncnsi~>~i:tl lil~n thickness H = IJK = non-tlimcnsion;n:l ~ninimum film thickness = non-tliniensiond niinimum film thickness for Newtot1i;tn Iluitl = thermal contluctivity of lubricant (Ns-I OC-') = thertnal contluctivity of lubricant at the atmospheric pressure (Ns-' "C-I) = thermal cot~tluctivit~ of slide-roll bodies (Ns-' "C-I) = non-tlimensio~i:tl Hertzian seniiwitlth L = blR = pressure (~m -' ) = maximum Hertze pressure (Nm-") = non-dimensional pressure P = PIE' = tenipcraturc-viscosity coefficien~s R RIR:! = cffec~ive ratlius of slitle-roll bodies I< = -Neruton-Rr~pI~s~~n ilemtio~t method ltrcs been n(lo$ted to obtnin full nu?~terical solzttion.sfi~r tlte line contncl EHL. Tlte ch(tngcs ~f t h~ slirlelroll rcltio, limitiirg sliear stress and uisco.sity, whiclt mrtinly reJlect the r~ort-Ne7utoni(tn helt(~uior of lz~hric(tn~s, have beett ruirlcly investiguted. Tlte cffecLs on llte line contact EHL (we d i~c l~s~c d . Furtlterniorc, tlte Pnrtiuf tltermal EHL sobctio~u ltnue bee~t prcse~tted for the te~n.per(fnlure and shenr .stre.s.s d i s t~i b z~t i~l~s (LS well ccs the coeficients of fijction on the s~~lf(fnce.s. f i e re.s~clls rf tlteoreticnl ana1yse.s contpare loell witlt the experiwre~ilnl rlrtta.= surlicc temperatures of slitlc-roll I,otlies (OC) = mean tcmlx'-;tture of Ittbric;~nt across the lil~n (OC) = reference temperature (OC) -= non-tlitncnsio~i:tl tenipel-au~rc 7' = TlTo = velocity in direction of motion ( n u -' ) = nun-tlimcnsio~i>~l velocity ii = irlU = vclocitics of slitlc-roll botlics (111s-') = rolling velocity ofslitle-roll botlies U = 0.5(U1 + U:,) (rns-I ) = non-tlilr~ensional rolling velocity V = 0.5(UI + Un)~lolE'R = non-tlinietisiv~ial sliding velocity V, = (U2 -Ul)'lo/E'I< = loatl per unit length (Nm-I) = non-tlirnensiotial loatl W = 7ull:"H = coortlinatrs (m) = pressure-viscosity coefficie~it of lubricant a = AIR (m2N-I) = limiting she:tr stress prol>ortionality co~ist:~t~ts -she . . ., ' -' 11 st1 .~I I I 12tc y = alllay ( 11s) = viscosity of lubricant (~s r n -~) = viscosity ol' I~cbricant at relkrcnce tctnpel-aturc ant1 atmospheric pressure (Ns~ii-') = Poisson ration of slitle-roll botlies = density of lubricant at attilospheric pressure (kgtn-:') = tlcnsity of slide-roll botlies (kgm-") = shear stress (Nm-') = limiting shear stress (Nm-') = limiting she;ir stress initial const;lnt (NIII-') = non-dimensional shear stress 7 = TIE' = non-dimensional she;tr srr;tin rate h = T~I T ,~ D...

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A Unified Theory of Friction

Cited by 6 publications

References 15 publications

The GABAA/benzodiazepine receptor is a heterotetramer of homologous alpha and beta subunits.

The GABAA/benzodiazepine receptor is a heterotetramer of homologous alpha and beta subunits.

The Bispectrum as a Signature of Gravitational Instability in Redshift Space

The Influence of Lubricant Visco-Plastic Character on the Line Contact EHL Under High Sliding Speeds

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