0000000000340766

AUTHOR

Beney Laurent

0000-0002-2757-2506

showing 6 related works from this author

Use of Gases in Microorganism Preservation Processes

2019

International audience

Lactococcus lactis[SDV.IDA]Life Sciences [q-bio]/Food engineeringSaccharomyces Cerevisiae[SDV.IDA] Life Sciences [q-bio]/Food engineeringComputingMilieux_MISCELLANEOUSProbiotic lactobacilli
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Mechanisms underlying the toxicity of lactone aroma compounds towards the producing yeast cells

2003

M. A G U E D O , L. B E N E Y , Y. W A C H EA N D J. - M. B E L I N. 2003. Aims: To study the fundamental mechanisms of toxicity of the fruity aroma compound c-decalactone, that lead to alterations in cell viability during its biotechnological production by yeast cells; Yarrowia lipolytica that is able to produce high amounts of this metabolite was used here as a model. Methods and Results: Lactone concentrations above 150 mg l )1 inhibited cell growth, depolarized the living cells and increased membrane fluidity. Infrared spectroscopic measurements revealed that the introduction of the lactone into model phospholipid bilayers, decreased the phase transition temperature. Moreover, the H + -…

MESH : YarrowiaMembrane FluidityMESH : Cell MembraneIntracellular pHMESH : Membrane FluidityYarrowiaFluorescence PolarizationApplied Microbiology and BiotechnologyMESH : PhospholipidsMembrane PotentialsCell membraneMESH : Spectroscopy Fourier Transform InfraredLactonesMESH : Hydrogen-Ion ConcentrationSpectroscopy Fourier Transform InfraredmedicineMembrane fluidityMESH : Membrane PotentialsViability assay[SDV.BC] Life Sciences [q-bio]/Cellular BiologySpectroscopyPhospholipidsAdenosine TriphosphatasesMESH : Adenosine Triphosphatasesbiology[ SDV.BC ] Life Sciences [q-bio]/Cellular BiologyCell growthCell MembraneYarrowiaGeneral MedicineHydrogen-Ion Concentrationbiology.organism_classificationBioproductionYeastMESH : Lactones[INFO.INFO-BT] Computer Science [cs]/Biotechnologymedicine.anatomical_structureBiochemistryFourier Transform InfraredMESH : Fluorescence Polarization[ INFO.INFO-BT ] Computer Science [cs]/BiotechnologyBiotechnologyJournal of Applied Microbiology
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Conservation à long terme de systèmes biologiques viables et fonctionnels

2013

National audience; La congélation et la déshydratation permettent la conservation de systèmes biologiques sur de longues périodes par le ralentissement des réactions de dégradation cellulaire. Ces opérations impliquent des transferts de chaleur et de masse pouvant conduire à l'altération des structures cellulaires. La maîtrise de la cinétique de ces transferts, associée à l'utilisation de différents protectants cellulaires, permet la mise en place de protocoles de congélation et de déshydratation spécifiques en fonction du système biologique à conserver.

[SDV] Life Sciences [q-bio][INFO.INFO-BT] Computer Science [cs]/Biotechnology[SDV.BIO]Life Sciences [q-bio]/Biotechnology[ SDV ] Life Sciences [q-bio][SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering[SDV]Life Sciences [q-bio][ SDV.BIO ] Life Sciences [q-bio]/Biotechnology[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering[INFO.INFO-BT]Computer Science [cs]/Biotechnology[ INFO.INFO-BT ] Computer Science [cs]/Biotechnology[SDV.BIO] Life Sciences [q-bio]/Biotechnology
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Industrial production of dried yeast: plasma membrane as a survival indicator of air drying process

2011

International audience; Preservation of microorganisms by desiccationis a major industrial interest.However, study of cell survival mechanismsthat occur during desiccation is complex. In this work, the impact of the magnitude and the kinetics of dehydration on yeastsurvival wereevaluatedin either hyperosmotic liquid medium or a gaseous environment. Asame lethal magnitude of dehydration and a same lethal kinetic effect were found. As previously shown for osmotic stress, this work demonstrate that yeast survival after drying was also related to plasma membrane disorganization, suggesting a similar passive rearrangement of the membrane components.Hyperosmotic treatment in liquid medium represe…

Microscopy[SPI.GPROC] Engineering Sciences [physics]/Chemical and Process EngineeringOsmotic dehydrationAir-drying[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process EngineeringYeastPlasma membrane
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Method for eliminating microorganisms present in and/or at the surface of a material to be decontaminated

2020

The present invention concems a method for eliminating microorganisms present in and/or at the surface of a material to be decontaminated comprising a step of irradiating said material to be decontaminated with radiation consisting of at least two light beams a1and a2 directed onto said material, the two light beams a1 and a2 respectively having a wavelength λ1 and λ2 of between 380 and 420nm.

[SDV.BBM] Life Sciences [q-bio]/Biochemistry Molecular Biology[SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular Biology
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Rôle de la membrane plasmique dans la survie des microorganismes à la déshydratation : Contribution à l’optimisation de procédés de conservation des …

2010

Cette synthèse est consacrée au rôle de la membrane plasmique des microorganismes, à travers ses évolutions structurales et fonctionnelles, dans la survie à la déshydratation. Elle comprend une première partie dans laquelle sont regroupés les principaux résultats portant sur l’influence de la déshydratation sur la survie microbienne, sur le comportement membranaire in situ et sur les mécanismes physiques de la déstabilisation membranaire. La deuxième partie est consacrée à la transposition de cette compréhension aux applications de déshydratation industrielle des microorganismes. Elle porte sur le développement d’un procédé de déshydratation des microorganismes et sur la mise au point d’out…

[SDV] Life Sciences [q-bio]Microorganism[SPI.GPROC] Engineering Sciences [physics]/Chemical and Process EngineeringSaccharomyces CerevisiaeMicroorganismePlasma membraneMembrane plasmique
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