Search results for "colour"

Effect of a physical pre-treatment and drying on carotenoids of goji berries ( Lycium barbarum L.)

2018

In order to evaluate the influence of an abrasive pre-treatment and drying at 50 °C, 60 °C, 70 °C of goji fruits (Lycium barbarum L.), changes in colour and carotenoids were studied. An extraction method was modified and adapted to assay the main carotenoid esters and saponified carotenoids of goji berries, before and after treatments. Goji berries were confirmed as a high source of zeaxanthin, with zeaxanthin-dipalmitate at about 2 g/kg dry weight. The reliability of the analytical method was confirmed by the high quantitative recoveries, about 100%, a higher repeatability than reference methods and a good reproducibility (lower than 5%). After drying, significant but small carotenoid loss…

Carotenoid-based colour of acanthocephalan cystacanths plays no role in host manipulation.

2009

Manipulation by parasites is a catchy concept that has been applied to a large range of phenotypic alterations brought about by parasites in their hosts. It has, for instance, been suggested that the carotenoid-based colour of acanthocephalan cystacanths is adaptive through increasing the conspicuousness of infected intermediate hosts and, hence, their vulnerability to appropriate final hosts such as fish predators. We revisited the evidence in favour of adaptive coloration of acanthocephalan parasites in relation to increased trophic transmission using the crustacean amphipodGammarus pulexand two species of acanthocephalans,Pomphorhynchus laevisandPolymorphus minutus. Both species show car…

A Note on Radio Antipodal Colouring of Paths

2005

International audience; The radio antipodal number of a graph G is the smallest integer c such that there exists an assignment f : V (G) -> {1, 2, . . . , c} satisfying |f(u) − f(v)| >= D − d(u, v) for every two distinct vertices u and v of G, where D is the diameter of G. In this note we determine the exact value of the antipodal number of the path, thus answering the conjecture given in [G. Chartrand, D. Erwin, and P. Zhang. Radio antipodal colorings of graphs, Math. Bohem. 127(1):57-69, 2002]. We also show the connections between this colouring and radio labelings.

Couleur et transparence à l’ère des procédés photomécaniques

2015

This paper aims to show that the reception of British coloured illustrated books in the early twentieth-century reflects the artistic and aesthetic repositioning induced by the development of photomechanical process. Photomechanical reproduction freed the graphic line as well as colour. Reviews published at the turn of the century—as exemplified by The Studio—reveal a tension between opacity and transparency, materiality and lightness, chromophilia and chromophobia. These oppositions apply to the art of the book—as in the books illustrated by Arthur Rackham and Edmund Dulac—as well as to interior decoration. They are subsumed in the image of the peacock’s ocellus, the eyespot that symbolise…

Pre-main-sequence stars older than 8 Myr in the Eagle nebula

2013

Kultūras atšķirības patērētāju uzvedībā Latvijā un Uzbekistānā, krāsu mārketings

2018

Krāsa ir neatņemama cilvēka dzīves sastāvdaļa, tā ietekmē zemapziņas līmeni. Krāsu katrā kultūrā var raksturot citādāk un tās ietekmē dažādus mūsu dzīves aspektus. Produkta pārdošanā krāsas izvēlei ir liela nozīme. Tirgotāji bieži izmanto krāsu kā priekšrocību tirgū. Neuromārketings pēta kā personas uztver krāsas. Viens no krāsu uztveres faktoriem ir kultūra. Katrā kultūrā krāsu izpratne ir citāda un tādēļ grūti ir izveidot produkta dizainu. Krāsām dažādās valstīs var būt atšķirīgas nozīmes. Tirgotāji izmanto krāsu kā vienu no galvenajiem mārketinga stratēģijas faktoriem. Šī bakalaura darba autors raksturo krāsu uztveres atšķirības Latvijas un Uzbekistānas kultūrās kā mārketinga līdzekli pr…

Many forms of the wood tiger moth (Parasemia plantaginis) : selective heterogeneity favours polymorphic warning signals

2013

Omega-3 Extraction from Anchovy Fillet Leftovers with Limonene: Chemical, Economic, and Technical Aspects

2019

International audience; We investigate selected chemical, technical, and economic aspects of the production of fish oil rich in polyunsaturated omega-3 fatty acids from anchovy filleting leftovers using d-limonene as the extraction solvent at ambient temperature and pressure. Entirely derived from the orange peel prior to orange squeezing for juice production, the bio-based solvent is easily recovered, affording a circular economy process with significant potential for practical applications.

STUDY OF RASPBERRY EXTRACT APPLICATIONS AS TEXTILE COLORANT ON NATURAL FIBERS

2014

The present study deals with the biomordant assisted application of natural extracts obtained from red raspberry (Rubus idaeus L.) fruits onto two different cellulosic supports – flax and bamboo. The study relies on the improvement of multifunctionalities such as colour fastness, washing and rubbing fastness, due to the synergism provided by the co-assistance of both a biomordant, and the complex resulted by inclusion of the pigment molecule, in the cavity of MCT-β-CD; it is well known that natural dye molecule have a good selectivity binding to the hydrophobic monochloro-triazynil-cyclodextrin’s (MCT-β-CD) cavity to form inclusion complexes. An investigation system provided the characteriz…

DEGRADATIVE ENZYMATIC ACTIVITIES IN FRESH-CUT BLOOD ORANGE SLICES DURING CHILLED STORED

2009

Summary Blood-orange fruits are suitable to fresh-cut fruit production because of their chemical compositions. Nevertheless, the main limitation of using freshly cut oranges is their susceptibility to juiciness loss and ascorbic acid degradation because of enzymatic alterations. The aim of this work is: to identify some of the enzymes causing the qualitative decay in blood-orange slices during 15 days of chilled storage (at 4 ± 0.5 °C and 85% RH); to investigate the susceptibility to the previous alterations of five blood-orange clones (Moro nucellare, Sanguinello nucellare, Tarocco arcimusa, Tarocco gallo and Tarocco meli) to select the most suitable one for fresh-cut production. The enzym…