ZIB

1

Electronic Resource

Cloning and characterization of the isopenicillin N synthetase gene mediating the formation of the β-lactam ring in Aspergillus nidulans

Ramon, D. ; Carramolino, L. ; Patino, C. ; [et al.]

Amsterdam : Elsevier

Gene 57 (1987), S. 171-181

add to mindlist on the mindlist

Details

ISSN: 0378-1119

Keywords: Cephalosporium ; Recombinant DNA ; evolution ; fungal gene cloning ; nucleotide sequence ; overexpression ; phage λ vector ; probe ; secondary metabolism

Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Topics: Biology

Type of Medium: Electronic Resource

URL: http://linkinghub.elsevier.com/retrieve/pii/0378-1119(87)90120-X

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

2

Electronic Resource

Transformation of Penicillium chrysogenum to sulfonamide resistance

Carramolino, L. ; Lozano, M. ; Perez-Aranda, A. ; [et al.]

Amsterdam : Elsevier

Gene 77 (1989), S. 31-38

add to mindlist on the mindlist

Details

ISSN: 0378-1119

Keywords: Recombinant DNA ; dihydropteroate synthetase ; dominant selection ; plasmid vectors, filamentous fungi

Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Topics: Biology

Type of Medium: Electronic Resource

URL: http://linkinghub.elsevier.com/retrieve/pii/0378-1119(89)90356-9

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

3

Electronic Resource

Transformation in Penicillium chrysogenum

Sanchez, F. ; Lozano, M. ; Rubio, V. ; [et al.]

Amsterdam : Elsevier

Gene 51 (1987), S. 97-102

add to mindlist on the mindlist

Details

ISSN: 0378-1119

Keywords: Recombinant DNA ; ascomycete ; integration ; penicillin production ; plasmid vector ; trpC gene

Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Topics: Biology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1016/0378-1119(87)90479-3

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

4

Electronic Resource

General model for a multimode Nd-doped fiber laser. II: Steady-state analysis of length-dependent polarization effects (2000)

Chartier, T. ; Sanchez, F. ; Stéphan, G.

Springer

Applied physics 70 (2000), S. 33-43

add to mindlist on the mindlist

Details

ISSN: 1432-0649

Keywords: PACS: 42.55.Wd; 42.25.Ja; 42.55.Ah

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract. We present a steady-state analysis of a general model for a bipolarized Nd-doped fiber laser including the slow longitudinal variations of the dynamical variables. The combined effects of pump-induced, distributed, and localized anisotropies are studied versus the fiber length. In particular, the evolution of the thresholds versus the pump-input polarization angle, for different fiber lengths, is investigated in depth. Approximate analytical results are derived for the thresholds and the output intensities. A good agreement with the numerical simulations is achieved in a large range of parameters.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s003400050005

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

5

Electronic Resource

General model for a multimode Nd-doped fiber laser. I: Construction of the model (2000)

Chartier, T. ; Sanchez, F. ; Stéphan, G.

Springer

Applied physics 70 (2000), S. 23-31

add to mindlist on the mindlist

Details

ISSN: 1432-0649

Keywords: PACS: 42.55.Wd; 42.25.Ja; 42.55.Ah

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract. We present a general modeling of a multi-longi-tudinal-mode bipolarized Nd-doped fiber laser which keeps both vectorial (polarization) and longitudinal properties in the dynamical equations. We use an approach based on random orientation of the microscopic dipoles and demonstrate that it is isomorphic to the model derived assuming a transverse two-site distribution function for the ions. This result is also true under the mean-field approximation. At steady-state, the model is the generalization of Rigrod’s theory to the case of a bipolarized laser.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s003400050004

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

6

Electronic Resource

Dielectric properties of fluid-saturated bone: a comparison between diaphysis and epiphysis (1988)

Mercato, G. ; Garcia-Sánchez, F. J.

Springer

Medical & biological engineering & computing 26 (1988), S. 313-316

add to mindlist on the mindlist

Details

ISSN: 1741-0444

Keywords: Bone conductivity ; Bone impedance ; Bone permittivity ; Diaphysis ; Epiphysis

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Chemistry and Pharmacology , Medicine

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02447087

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

7

Electronic Resource

Variation of the electric properties along the diaphysis of bovine femoral bone (1991)

Mercato, G. ; García Sánchez, F. J.

Springer

Medical & biological engineering & computing 29 (1991), S. 441-446

add to mindlist on the mindlist

Details

ISSN: 1741-0444

Keywords: Bone conductivity ; Bone impedance ; Bone permittivity ; Cortical bone ; Femoral diaphysis

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Chemistry and Pharmacology , Medicine

Notes: Abstract A preliminary study is presented of the variability of the electric properties, in the axial, tangential and radial directions, as a function of position in the diaphysis of a femoral bovine bone. The measurements were carried out at three frequencies: 100 Hz, 10 kHz and 1 MHz. It is shown that both the conductivity and the permittivity exhibit significant variations along the diaphysis, and increase in magnitude towards the epiphyses. From this study, the variation of the electric properties cannot be clearly and directly ascribed to the longitudinal variability of the total volumetric fluid content of the bone. The results reflect the orthotropic nature of the electric properties, at any given location, and indicate a position-dependent tendency towards axis symmetry.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02441667

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

8

Electronic Resource

Assay of cholinesterase using a proenhancer of the luminol-H2O2-horseradish peroxidase reaction (1995)

Díaz, A. Navas ; Sanchez, F. García ; García, J. A. González ; [et al.]

New York : Wiley-Blackwell

Journal of Bioluminescence and Chemiluminescence 10 (1995), S. 285-289

add to mindlist on the mindlist

Details

ISSN: 0884-3996

Keywords: Cholinesterase ; luminol ; pro-enhancer ; chemiluminescence ; Chemistry ; Biochemistry and Biotechnology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Biology , Chemistry and Pharmacology

Notes: 2-Naphthyl acetate acts as a pro-enhancer of the luminol-H2O2-horseradish peroxidase reaction. Cholinesterase hydrolyses the bound acetyl group and produces 2-naphthol, and this compound is an enhancer of the chemiluminescent reaction. We studied the kinetics of chemiluminescent emission and the influence of 2-naphthyl acetate and cholinesterase enzyme concentration. The cholinesterase concentration versus chemiluminescence intensity maximum was linear for cholinesterase between 0 and 181 μU/mL, with a detection limit of 8 μU/mL and a relative standard deviation of 9.5% (n = 3), for a sample containing 90.67 μU/mL of cholinesterase.

Additional Material: 5 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/bio.1170100505

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

9

Electronic Resource

Phenol derivatives as enhancers and inhibitors of luminol-H2O2-horseradish peroxidase chemiluminescence (1998)

Díaz, A. Navas ; Sánchez, F. García ; González Garcia, J. A.

New York : Wiley-Blackwell

Journal of Bioluminescence and Chemiluminescence 13 (1998), S. 75-84

add to mindlist on the mindlist

Details

ISSN: 0884-3996

Keywords: luminol ; enhanced chemiluminescence ; phenol ; Chemistry ; Biochemistry and Biotechnology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Biology , Chemistry and Pharmacology

Notes: Systematic studies on phenol derivatives facilitates an explanation of the enhancement or inhibition of the luminol-H2O2-horseradish peroxidase system chemiluminescence. Factors that govern the enhancement are the one-electron reduction potentials of the phenoxy radicals (PhO•/PhOH) vs. luminol radicals (L•/LH-) and the reaction rates of the phenol derivatives with the compounds of horseradish peroxidase (HRP-I and HRP-II). Only compounds with radicals with a similar or greater reduction potential than luminol at pH 8.5 (0.8 V) can act as enhancers. Radicals with reduction potentials lower than luminol behave in a different way, because they destroy luminol radicals and inhibit chemiluminescence. The relations between the reduction potential, reaction rates and the Hammett constant of the substituent in a phenol suggest that 4-substituted phenols with Hammett constants (σ) for their substituents similar or greater than 0.20 are enhancers of the luminol-H2O2-horseradish peroxidase chemiluminescence. In contrast, those phenols substituted in position 4 for substituents with Hammett constants (σ) lower than 0.20 are inhibitors of chemiluminescence. On the basis of these studies, the structure of possible new enhancers was predicted. © 1998 John Wiley & Sons, Ltd.

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)