Effects of pomegranate flower complex on the skin / Julian Smits in PERSONAL CARE EUROPE, Vol. 5, N° 1 (02/2012)  

[article]  inPERSONAL CARE EUROPE > Vol. 5, N° 1 (02/2012) . - p. 25-30 Titre : Effects of pomegranate flower complex on the skin Type de document : texte imprimé Auteurs : Julian Smits, Auteur ; Norbert Herbst, Auteur Année de publication : 2012 Article en page(s) : p. 25-30 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antiâge:Antirides Antioxydants Collagène -- Synthèse Extraits de plantes:Extraits (pharmacie) Fruits -- Emploi en cosmétologie Grenadier et constituants Phosphate ascorbylique de sodium Index. décimale : 668.5 Parfums et cosmétiques Résumé : The balance between collagen breakdown and collagen synthesis plays a crucial role in the extrinsic and intrinsic process of skin ageing. Environmental factors acting on the skin and genetically-determined processes cause an increase in collagen breakdown and at the same time a reduction in the synthesis of new collagen, which results in the increased appearance of wrinkles. One of the enzymes responsible for the breakdown of collagen is matrix metalloproteinase 1 (MMP-1). It has been demonstrated that an extract of pomegranate flowers reduces MMP-1 mRNA gene expression in UVA irradiated and non-irradiated primary human dermal fibroblasts. Due to this characteristic, the pomegranate flower extract (PGFE) was combined with sodium ascorbyl phosphate (SAP) into a single product (PGFE/SAP). SAP, a derivative of vitamin C, is a wellknown antioxidant and collagen booster. The combined product made of PGFE and SAP (PGFE/SAP) was successfully tested for its safety in use both in vitro and in vivo. Results showed that PGFE/SAP promoted collagen synthesis, reduced the breakdown of collagen and measurability and visibly reduced the depth of facial wrinkles caused by skin ageing. Note de contenu : - MATERIAL AND METHODS : MMP-1 gene expression analysis - MMP-1 synthesis (ELISA) - UV cytotoxicity assay - Product manufacture - Application formula - Tests concerning product safety - In vivo studies - Ultrasonography - Profilometry (PRIMOS) - Visual evaluation (VisioFace Quick) - RESULTS : Product safety (cytotoxicity, phototoxicity, mutagenicity, eye iritation (HET CAM), skin iritation (SPT/RPT), allergy research) - In vitro (MMP-1 gene expression analysis (RT-PCR), UV cytotoxicity, MMP-1 synthesis (ELISA), in vivo (skin density measurement using ultrasonography, profilometry (PRIMOS), visual evaluation (VisioFace Quick) En ligne : https://drive.google.com/file/d/1iKAqJcPNV0DsFXchyKz6meJaQwV1kbnP/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13392 [article]

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Pomegranate fallen leaves as a source of natural dye for mordant-free dyeing of wool / Aminoddin Haji in COLORATION TECHNOLOGY, Vol. 139, N° 2 (04/2023)  

[article]  inCOLORATION TECHNOLOGY > Vol. 139, N° 2 (04/2023) . - p. 165-170 Titre : Pomegranate fallen leaves as a source of natural dye for mordant-free dyeing of wool Type de document : texte imprimé Auteurs : Aminoddin Haji, Auteur ; Fatemeh Shahmoradi Ghaheh, Auteur ; Liliana Indrie, Auteur Année de publication : 2023 Article en page(s) : p. 165-170 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse de variance En statistique, l'analyse de la variance (terme souvent abrégé par le terme anglais ANOVA : ANalysis Of VAriance) est un ensemble de modèles statistiques utilisés pour vérifier si les moyennes des groupes proviennent d'une même population. Les groupes correspondent aux modalités d'une variable qualitative (p. ex. variable : traitement; modalités : programme d'entrainement sportif, suppléments alimentaires ; placebo) et les moyennes sont calculés à partir d'une variable continue (p. ex. gain musculaire). Ce test s'applique lorsque l'on mesure une ou plusieurs variables explicatives catégorielles (appelées alors facteurs de variabilité, leurs différentes modalités étant parfois appelées "niveaux") qui ont de l'influence sur la loi d'une variable continue à expliquer. On parle d'analyse à un facteur lorsque l'analyse porte sur un modèle décrit par un seul facteur de variabilité, d'analyse à deux facteurs ou d'analyse multifactorielle sinon. (Wikipedia) Colorants végétaux Grenadier et constituants Laine Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : The application of metal mordants is usually necessary in dyeing of wool with natural dyes to improve the dye exhaustion and fastness properties. The majority of metal salts generally used as mordants are considered as toxic and it is important to find replacements for them. Plant sources with high content of tannins are good candidates as bio-mordant or colourant to overcome this drawback. In this study, the waste fallen leaves of pomegranate tree were used as a source of natural dye for the eco-friendly dyeing of wool fabric without the use of metal mordants. The dyeing process variables including dye concentration, dyebath pH, and temperature were optimised using response surface methodology to obtain the highest colour strength. The colour strength was increased by increasing the natural dye powder up to 100%owf while the optimum pH and dyebath temperature were 4 and 100°C, respectively. The sample dyed under the optimal condition exhibited good fastness properties against washing and light. This study approved the potential of Punica granatum fallen leaves for the dyeing of wool without any mordant, while high fastness properties were obtained. Note de contenu : - Table 1 : The factors and their upper and lower limits The experimental design and responses - Table 2 : Analysis of variance (ANOVA) results of the reduced quadratic model - Table 3 : The coefficient estimates of the dyeing process variables - Table 4 : The proposed optimal condition for obtaining highest colour strength - Table 5 : Fastness properties of the sample dyed under the optimal condition DOI : https://doi.org/10.1111/cote.12651 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12651 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39528 [article]

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The effect of mordant salts on antibacterial activity of wool fabric dyed with pomegranate and walnut shell extracts in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 6 (2012) . - p. 473-478 Titre : The effect of mordant salts on antibacterial activity of wool fabric dyed with pomegranate and walnut shell extracts Type de document : texte imprimé Année de publication : 2012 Article en page(s) : p. 473-478 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antibactériens Colorants végétaux Grenadier et constituants Laine Mordançage (teinture) Noisetier et constituants Odeurs -- Lutte contre Sels métalliques Tanins végétaux Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Natural dyes have attracted increasing worldwide attention because of the carcinogenicity and environmental effects of synthetic dyes. In this study, wool fabric was treated with tannin-rich extracts of Punica granatum peel and walnut shell in combination with some mordants. The effect of various mordants on the colorimetric and antibacterial properties of wool fabrics was investigated. The results showed that pretreatment with metallic mordants substantially improved the dyeing and fastness properties of wool fabrics. The extracts of Punica granatum peel and walnut shell showed a significant antibacterial activity at 5% concentration. In addition, antibacterial activity was dramatically enhanced using metallic salts. The antibacterial activity of samples dyed with natural dyes and without any mordant was not good, while the mordanted samples with copper, aluminum and tin salts obtained considerable antimicrobial properties following lightening and washing fastness. The extracts of Punica granatum peel and walnut shell can be considered as viable alternatives instead of artificial antibacterial agents for hospital textiles as well as an effective anti-odour agent for sports and household textiles. DOI : 10.1111/j.1478-4408.2012.00402.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00402.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16453 [article]

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