Maximum Parsimony Phylogenetic Inference Using Simulated Annealing

International audienc

A Bottom-Up Implementation of Path-Relinking for Phylogenetic Reconstruction Applied to Maximum Parsimony

In this article we describe a bottom-up implementation of Path-Relinking for Phylogenetic Trees in the context of the resolution of the Maximum Parsimony problem with Fitch optimality criterion. This bottom-up implementation is compared to two versions of an existing top-down implementation. We show that our implementation is more efficient, more interesting to compare trees and to give an estimation of the distance between two trees in terms of the number of transformation

Case studies: Raman implementation for process lifecycle management in fermentation based processes

Existing metabolite analyzers for several inline fermentation based vaccine processes are becoming obsolete in upcoming years. Analyzers are used to support classified parameters and attributes as well as characterization of the fermentation processes. A PAT solution is preferred as a replacement as it would allow for enhanced process understanding and control. Raman spectroscopy has been aligned as a core technology for implementation with varying challenges based on media, organism, processing parameters and attributes being measured. Implementation requires a highly collaborative approach across functions and sites to ensure effective implementation with no interruption to supply. Using a standardized approach to Raman model development and validation, robust models have been developed for 2 product lines with implementation scheduled over the next three years

Characterization of aroma-active compounds in black sapote (Diospyros digyna Jacq.)

The volatile compounds of black sapote fruit were isolated by simultaneous distillation-solvent extraction and analysed by gas chromatography-flame ionization detector and gas chromatography-mass spectrometry. A total of 32 volatile constituents were detected, which represented 4.57 mg kg−1 of the fruit. The composition of volatile constituents of the fruit included 9 terpene compounds (49.1% of the total volatile composition), 11 ketones (9%), 5 aldehydes (29.2%), 4 alcohols (3.6%), 2 esters (8.2%) and a paraffin (0.8%). Major compounds were (Z)-b-ocimene (26.6% of the total volatile composition), (E)-cinnamaldehyde (25.5%) and limonene (17.0%). By application of odour activity values, seven constituents were considered as aroma-active volatiles, from which the most important were (E)-cinnamaldehyde, 3-methylbutanal, limonene, (Z)-β-ocimene, linalool, methyl (E)-cinnamate, and β-caryophyllene

Case study: Raman implementation for process lifecycle management in fermentation based processes

Existing metabolite analyzers for several inline fermentation based vaccine processes are becoming obsolete in upcoming years. Analyzers are used to support classified parameters and attributes as well as characterization of the fermentation processes. A PAT solution is preferred as a replacement as it would allow for enhanced process understanding and control. Raman spectroscopy has been aligned as a core technology for implementation with varying challenges based on media, organism, processing parameters and attributes being measured. Implementation requires a highly collaborative approach across functions and sites to ensure effective implementation with no interruption to supply. Using a standardized approach to Raman model development and validation, robust models have been developed for 2 product lines with implementation scheduled over the next three years