Search results for "blend"

Extensional flow of HDPE/LDPE blends

1982

Elongational viscosity data, obtained through the converging flow analysis by Cogswell, are presented for two types of HDPE/LDPE blends at various compositions and different temperatures. The results relative to the homopolymer parents compare favourably with literature data obtained also with different and more sophisticated techniques. Those relative to blends show peculiar features for the two cases: when the newtonian viscosity of the LDPE is higher all the blends show a behaviour typical of the LDPE with a maximum in η el /η0 enhanced at small percentage of HDPE; when the newtonian viscosity of the LDPE is similar to that of the HDPE there is only a gradual change in the properties.

Controlled production of patchy particles from the combined effects of nanoprecipitation and vitrification

2017

Using molecular dynamics simulations, we study a simple and scalable method for fabricating patchy nanoparticles via the assembly of binary polymer blends under a rapid solvent exchange. Patchiness can be achieved by incorporating a glassy component, which kinetically traps the particle morphology along the path to the equilibrium configuration. Our simulations reveal that the number of surface patches increases for larger nanoparticles and for more asymmetric blend ratios, while the size distribution of the patches remains rather uniform. Other than multi-patch nanoparticles, Janus structures have been obtained for small nanoparticles. Further, ribbon structures with elongated surface doma…

Perceptual odor blending is influenced by chemical complexity of odorant mixtures

2008

International audience; Perfumers and flavorists are familiar with odor blending phenomenon and often report that a minimum number of odorants has to be mixed for a good odor blend to arise. Previous studies in humans and animals suggested that a configural process could be involved in the perceptual analysis of mixtures of odorants. It has been proposed that the perceptual blending phenomenon corresponds to a configural perception of odorant mixtures. In the present study, we investigated the influence of chemical complexity on the configural perception of odorant mixtures. Six mixtures including 2 to 6 odorants as well as each unmixed odorant were assessed for their odor quality by a pane…

Influence of the slag content on the hydration of blended cement

2015

International audience; Slag is increasingly used for replacing a part of clinker. The addition of slag modifies the hydration process and so the physico-chemical properties (such as porosity, transport properties) of cementitious materials. Indeed the evolution of the physico-chemical properties are determined by the hydration kinetics of the anhydrous phases and the composition of the hydrated phases. The hydration process of slag blended cement is still under investigation due to the complex interactions between clinker and slag. The aim of this work is to link the evolution of slag blended cement properties (such as bound water, chemical shrinkage, mineralogy, porosity) to the hydration…

Pharmacophore study of a blending six-component odor mixture

2016

The first step of odor perception is an interaction between odorants and olfactory receptors [1]. The corresponding transduced olfactory signals, conveyed by olfactory sensory neurons, are then processed by the brain [2]. It is now accepted that the main strategy used to discriminate thousands of odors results from a combinatorial coding [3]. Moreover, odors perceived in our environment are mainly the result of mixtures of odorants; however, the specific mechanisms involved in their processing remain poorly understood [4]. In previous studies performed in the CSGA of Dijon [5-7], we investigated the perception of a mixture of 6 components: vanillin, oxanone (4-(4-hydroxyphenyl)butan-2-one),…

Exploring the network of odours shared by an aroma blending mixture

2019

International audience; The first step of odour perception is an interaction between odorants and olfactory receptors [1]. Moreover, odours perceived in our environment are mainly the result of mixtures of odorants; however, the specific mechanisms involved in their processing remain poorly understood [2]. In previous studies performed at INRA-CSGA [3], the perception of a mixture of ethyl isobutyrate (Et-iB, strawberry-like odour, STR) and ethyl maltol (Et-M, caramel-like odour, CAR) was investigated in comparison with a reference (allyl hexanoate, Al-H, pineapple-like odour, PNA) chosen to evoke an odour close to the one expected in the mixture. The binary specific mixture of Et-iB and Et…

Understanding the odor mixture

2013

International audience

Chapter 5 - Perceptual interactions in complex odor mixtures: the blending effect

2011

Exploring of odor blending in odorant mixtures by a pharmacophore approach

2015

The first step of odor perception is an interaction between odorants and olfactory receptors (ORs) [1]. It is now accepted that the main strategy used by Humans to perceive thousands of odors results from a combinatorial coding [2]. Moreover, odors we perceived in our environment are mainly the result of mixtures of odorants; however, the processes involved remain poorly understood [3]. In previous studies performed in the CSGA of Dijon[4, 5], the perception of a mixture of specific proportions of ethyl isobutyrate (Et-iB, strawberry-like odor) and ethyl maltol (Et-M, caramel-like odor) was investigated in comparison with a reference (allyl hexanoate, Al-H, pineapple-like odor) chosen to ev…

Exploring the odorant and molecular characteristics of molecules sharing the odour notes of an aroma blending mixture

2021

Online event (Live and on-demand); International audience; To perceive a huge number of odors from few hundreds ORs, the human olfactory system encodes odor identities by an olfactory scheme whereby one olfactory receptor (OR) recognizes multiple odorants while one odorant activates different combinations of ORs [1, 2]. Odors perceived in our environment are mainly the result of mixtures of odorants, but the specific mechanisms involved in their processing remain poorly understood [3]. In previous studies performed at INRAE-CSGA [4], the perception of a mixture of ethyl isobutyrate (Et iB, strawberry-like odor, STR) and ethyl maltol (Et-M, caramel-like odor, CAR) was investigated in compari…