Results 51 to 60 of about 133,520 (150)

Preparation of Mo-impregnated mordenite catalysts for the conversion of refined kernel palm oil into bioavtur

open access: yesCommunications in Science and Technology, 2023
The research aims to study the effects of Mo metal embedded on H-Mordenite on its activity and selectivity of hydrodeoxygenation (HDO) for Refined Palm Kernel Oil (RPKO) into bioavtur.
Wega Trisunaryanti   +7 more
doaj   +1 more source

FOUR-FACTOR RESPONSE SURFACE OPTIMIZATION OF THE ENZYMATIC SYNTHESIS OF WAX ESTER FROM PALM KERNEL OIL

open access: yesIndonesian Journal of Chemistry, 2010
The synthesis of wax ester using refined, bleached and deodorized (RBD) palm kernel oil (PKO) and oley alcohol catalyzed by Lipozyme IM was carried out.
Erin Ryantin Gunawan, Dedy Suhendra
doaj   +1 more source

Quasi-Newton Methods for Markov Chain Monte Carlo [PDF]

open access: yes, 2011
The performance of Markov chain Monte Carlo methods is often sensitive to the scaling and correlations between the random variables of interest. An important source of information about the local correlation and scale is given by the Hessian matrix of ...
Chain Monte Carlo   +2 more
core   +2 more sources

Machine learning-guided directed evolution for protein engineering [PDF]

open access: yes, 2019
Machine learning (ML)-guided directed evolution is a new paradigm for biological design that enables optimization of complex functions. ML methods use data to predict how sequence maps to function without requiring a detailed model of the underlying ...
Arnold, Frances H.   +2 more
core   +1 more source

Nonparametric inference of doubly stochastic Poisson process data via the kernel method

open access: yes, 2011
Doubly stochastic Poisson processes, also known as the Cox processes, frequently occur in various scientific fields. In this article, motivated primarily by analyzing Cox process data in biophysics, we propose a nonparametric kernel-based inference ...
Kou, S. C., Zhang, Tingting
core   +1 more source

Expanding Maize Genetic Resources with Predomestication Alleles: Maize–Teosinte Introgression Populations

open access: yesThe Plant Genome, 2016
Teosinte ( subsp. H. H. Iltis & Doebley) has greater genetic diversity than maize inbreds and landraces ( subsp. ). There are, however, limited genetic resources to efficiently evaluate and tap this diversity.
Zhengbin Liu   +16 more
doaj   +1 more source

Data inversion methods to determine sub-3 nm aerosol size distributions using the particle size magnifier [PDF]

open access: yesAtmospheric Measurement Techniques, 2018
Measuring particle size distribution accurately down to approximately 1 nm is needed for studying atmospheric new particle formation. The scanning particle size magnifier (PSM) using diethylene glycol as a working fluid has been used for ...
R. Cai   +14 more
doaj   +1 more source

A theoretical study of the kernel function for resistivity prospecting with a Sclilumherger apparatus in water

open access: yesAnnals of Geophysics, 1974
On the basis of already known theoretical results concerning the use of the geoelectrical sounding method with the a p p a r a t us immersed in water, in t h e present paper we i n d i v i d u a t e the kernel f u n c t i on of t h e p a r
D. SCHIAVONE, D. PATELLA
doaj   +1 more source

Existence of a unique weak solution to a non-autonomous time-fractional diffusion equation with space-dependent variable order

open access: yesAdvances in Difference Equations, 2021
In this contribution, we investigate an initial-boundary value problem for a fractional diffusion equation with Caputo fractional derivative of space-dependent variable order where the coefficients are dependent on spatial and time variables. We consider
Karel Van Bockstal
doaj   +1 more source

Kernel estimates for nonautonomous Kolmogorov equations with potential term

open access: yes, 2014
Using time dependent Lyapunov functions, we prove pointwise upper bounds for the heat kernels of some nonautonomous Kolmogorov operators with possibly unbounded drift and diffusion coefficients and a possibly unbounded potential ...
A. Aibeche   +9 more
core   +1 more source

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