ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

1

Unbekannt

A study of atmospheric extinction at cerro tololo inter-American observatory (1983)

Gutierrez-Moreno, A. ; Moreno, H.

Elsevier

In: Atmospheric Environment. 1983; 17(4): 897. Published 1983 Jan 01. doi: 10.1016/0004-6981(83)90443-2.

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 1983-01-01

Print ISSN: 0004-6981

Digitale ISSN: 1878-2442

Thema: Geologie und Paläontologie , Physik

Publiziert von Elsevier

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

AKTUELLE ARTIKEL

S·F·X

Volltext

2

Digitale Medien

A qualitative mathematical model of the ontogeny of a circadian rhythm in crayfish (1993)

Lara-Aparicio, Miguel ; Medrano, Santiago López ; Fuentes-Pardo, Beatriz ; [weitere]

Springer

Bulletin of mathematical biology 55 (1993), S. 97-110

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1522-9602

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Mathematik

Notizen: Abstract Based on experimental work on the ontogeny of the electroretinogram circadian rhythm in crayfish, we present a mathematical model simulating changes in both frequency and amplitude of the electroretinogram oscillation during several developmental stages until shortly before the adult age. Simultaneously, we propose a hypothetical oscillation in the hormonal release whose frequency is imposed on the electroretinogram oscillation. The model consists of two coupled nonlinear oscillators in which a dynamical response is obtained mainly through an Andronov-Hopf bifurcation. Through the construction of the model, a biological hypothesis about the essential elements underlying the ERG circadian rhythm and their interrelations is formulated and discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02460296

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

3

Digitale Medien

The kinetics of enzyme systems involving activation of zymogens (1993)

Havsteen, B. H. ; Garcia-Moreno, M. ; Valero, E. ; [weitere]

Springer

Bulletin of mathematical biology 55 (1993), S. 561-583

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1522-9602

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Mathematik

Notizen: Abstract A general model of zymogen activation is proposed and explicit kinetic equations for the time courses of the various species and products involved are given. These equations are valid for the whole course of the reaction and therefore for both the transient phase and the steady state. This model is sufficiently general to include mechanisms possessing one or more steps of zymogen activation besides possible steps of inhibition (reversible or irreversible) or inactivation.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02460651

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

4

Digitale Medien

First observation of lasing at 231 Å in neon-like nickel using the prepulse technique (1993)

Nilsen, J. ; Moreno, J. C. ; MacGowan, B. J. ; [weitere]

Springer

Applied physics 57 (1993), S. 309-311

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-0649

Schlagwort(e): 42.60.By ; 32.30.Rj

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract We report lasing for the first time in nickel on the neon-like J=0→1, 3p→3s transition at 231 Å as well as several weaker transitions including the J=2»1 lines at 298 Å and 304 Å. Amplification is seen only when the prepulse technique of using a low intensity prepulse before the main optical drive pulse is used to illuminate the nickel target. The prepulse technique is also shown to produce lasing in copper and dramatically improve the output of the germanium laser.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00332454

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

5

Digitale Medien

Equilibrium dialysis and ultrafiltration studies of calcium and phosphate binding by human salivary proteins. Implications for salivary supersaturation with respect to calcium phosphate salts (1982)

Hay, D. I. ; Schluckebier, S. K. ; Moreno, E. C.

Springer

Calcified tissue international 34 (1982), S. 531-538

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-0827

Schlagwort(e): Saliva ; Calcium ; Phosphate ; Ion-binding ; Supersaturation

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Medizin , Physik

Notizen: Summary Previous ultrafiltration studies indicated that up to one-half of the calcium and two-thirds of the phosphate in human salivary secretions may be bound by salivary proteins. Since this binding is an important variable in determining the extent of salivary supersaturation with respect to calcium phosphate salts, and since the amount of binding reported is surprisingly large, calcium and phosphate ion-binding by salivary macromolecules has been reexamined. From experiments using equilibrium dialysis, it was found that (1) the fraction of salivary calcium involved in macromolecular complexes ranges from a few percent for unstimulated secretions, to no more than about 10% for stimulated glandular salivas, and (2) salivary proteins do not bind phosphate ions to any significant extent. These findings, and experiments using an improved ultrafiltration membrane, indicate that the earlier results were artifacts of the ultrafiltration technique. Fractionation of salivary proteins, followed by equilibrium dialysis measurements, showed that the anionic proline-rich proteins and a basic proline-rich glycoprotein are responsible for most of the calcium binding now observed. The finding that macromolecular complexes of salivary calcium and phosphate have been overestimated in the past, leads to the conclusion that salivary calcium and phosphate ion activities in stimulated salivary secretions may be up to 50 to 100% higher than previously thought. Revised values were therefore used to recalculate the degree of salivary supersaturation with respect to calcium phosphate salts. The results indicate that stimulated salivary secretions are supersaturated with respect to dicalcium phosphate dihydrate; this is a substantially greater degree of supersaturation than previously reported.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02411299

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

6

Digitale Medien

*-Products on D 1 (ℂ), S 2 and related spectral analysis (1983)

Moreno, Carlos ; Ortega-Navarro, Pilar

Springer

Letters in mathematical physics 7 (1983), S. 181-193

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1573-0530

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract We provide expressions to find recursively any 2-cochain of each of two invariant formal differentiable deformations of C ∞(S 2), here called * and *″. They are obtained in ways similar to those followed to obtain, respectively, Wick's and Moyal's deformations on ℂ n . We provide the expression for the corresponding *-exponential, on Poincaré's disk and on S 2, and its proper spectral decomposition. No proofs are given in this letter. For detailed proofs in the case of D 1 (ℂ), see [1]. The proofs for the case S 2 follow the same pattern; however, [1] does not contain the spectral analysis given here.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00400432

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

7

Digitale Medien

Are there fast-rotating giant active longitudes ? (1993)

Rodriguez Taboada, R. E. ; Moreno, G. Gil

Springer

Solar physics 144 (1993), S. 399-402

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1573-093X

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The distribution of significant solar activity for the northern and southern solar hemispheres from 1964 through 1979 is studied. Two 90-degree wide active longitudes, separated 180 degrees and rotating with a velocity 1% faster than the solar surface, are proposed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00627603

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

8

Digitale Medien

Mendelian recessive ratios in acute poststreptococcal glomerulonephritis (1982)

Rodríguez-Iturbe, B. ; Moreno-Fuenmayor, H. ; Rubio, L. ; [weitere]

Springer

Cellular and molecular life sciences 38 (1982), S. 918-920

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1420-9071

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Medizin

Notizen: Summary A prospective study of 15 families (61 siblings) of index cases of acute poststreptococcal glomerulonephritis detected a proportion of 0.260±0.016 SEM. This is an excellent fit for a single autosomal recessive trait.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01953653

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

9

Digitale Medien

Effects of EDITEMPA on dental calculus and caries formation in vivo (1983)

Gaffar, Abdul ; Moreno, E. C. ; Muhlemann, H. R. ; [weitere]

Springer

Calcified tissue international 35 (1983), S. 362-365

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-0827

Schlagwort(e): N,N,N',N'-ethylenediamine (tetramethylene phosphonic acid) ; Calculus in beagles ; Anticaries effects ; Rat caries

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Medizin , Physik

Notizen: Summary N,N,N',N'-ethylene diamine tetra (methylene phosphonic acid)—EDITEMPA—was highly effective in reducing dental calculus formation in beagle dogs when applied topically as a 1% solution or in a mouth rinse. A dose-response study in 40 beagles for 12 weeks with dentifrices containing 1, 2, 2.75, and 2.75% EDITEMPA+0.1% NaF gave a significant (α=0.05) reduction in calculus formation. Based on these results, it was also concluded that 0.1% NaF did not affect the anticalculus activity of 2.75% EDITEMPA. The effect of EDITEMPA dentifrice on dental caries in rats was also studied. A dentifrice containing 1.69% EDITEMPA significantly (α〈0.01) reduced smooth and fissure caries in rats when applied topically. Collectively, the data suggested that EDITEMPA was an effective anticalculus agent and that it did not damage developing enamel in vivo.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02405059

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

10

Digitale Medien

The fourth moment of Ramanujan τ-function (1983)

Moreno, Carlos J. ; Shahidi, Freydoon

Springer

Mathematische Annalen 266 (1983), S. 233-239

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-1807

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01458445

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext