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The expression of genes involved in microcin maturation regulates the production of active microcin E492
(2002)
The production of active microcin E492, a channel-forming bacteriocin, was studied in exponential and stationary phase. The structural gene for this bacteriocin (mceA) is transcribed in exponential as well as in stationary ...
Trypanosoma cruzi: Activities of lapachol and α- and β-lapachone derivatives against epimastigote and trypomastigote forms
(Elsevier Ltd, 2008-01-15)
Derivatives of natural quinones with biological activities, such as lapachol, α- and β-lapachones, have been synthesized and their trypanocidal activity evaluated in vitro in Trypanosoma cruzi cells. All tested compounds ...
Urban form datasets of 194 cities delineated based on the contiguous urban fabric for 1990 and 2015
(Elsevier Inc., 2020-12)
The present research datasets were processed for the article “The global homogenization of urban form. An assessment of 194 cities across time” [1]. They consist of land cover spatial layers, longitude and latitude point ...
A Note on Bias of Closed-Form Estimators for the Gamma Distribution Derived From Likelihood Equations
(Amer Statistical Assoc, 2019-04-03)
We discuss here an alternative approach for decreasing the bias of the closed-form estimators for the gamma distribution recently proposed by Ye and Chen in 2017. We show that, the new estimator has also closed-form ...
A comparison of density structures of a star forming and a non-star-forming globule - DCld303.8-14.2 and Thumbprint Nebula
(EDP SCIENCES S A, 2007-03)
We present a study of radial density structure of the star forming globule, DCld303.8-14.2 (DC303), and a non-star forming globule, Thumbprint Nebula (TPN), using near-infrared data taken with the ISAAC instrument on the ...
Using weak forms to derive asymptotic expansions of elliptic equations with high-contrast cofficients
(Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Matemáticas, 2014-07-01)
In this work we review some recent results on approximation of solutions of elliptic problems with high-contrast coefficients. In particular, we detail the derivation of asymptotic expansions for the solution in terms of ...
Sign changes of Fourier coefficients of cusp forms supported on prime power indices
(World Scientific Publishing Co. Pte Ltd, 2014)
© World Scientific Publishing Company. Let f be an even integral weight, normalized, cuspidal Hecke eigenform over SL2(Z) with Fourier coefficients a(n). Let j be a positive integer. We prove that for almost all primes σ ...
On product expansions of generalized modular forms
(2008)
We give examples of generalized modular forms with the property that their divisors are supported at the cusps and the exponents in their q-product expansions take infinitely many values. © 2007 Springer Science+Business ...
Graded Witt kernels of the compositum of multiquadratic extensions with the function fields of Pfister forms
(2016)
Let F be a field of characteristic 2 and W-q(F) be the Witt group of nonsingular quadratic forms over F. Let phi be a bilinear Pfister form over F and L be a multiquadratic extension of F of separability degree less than ...
On the convergence of random polynomials and multilinear forms
(Academic Press Inc Elsevier Science, 2011-10)
We consider different kinds of convergence of homogeneous polynomials and multilinear forms in random variables. We show that for a variety of complex random variables, the almost sure convergence of the polynomial is ...