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Low-temperature washing without loss in performance / Juergen Franke in SOFW JOURNAL, Vol. 144, N° 5 (05/2018)  

[article]  inSOFW JOURNAL > Vol. 144, N° 5 (05/2018) . - p. 2-8 Titre : Low-temperature washing without loss in performance Type de document : texte imprimé Auteurs : Juergen Franke, Auteur ; Sonja Fischer, Auteur ; Maria de Moragas, Auteur ; Oliver Spangenberg, Auteur ; Gerhard Merkle, Auteur Année de publication : 2018 Article en page(s) : p. 2-8 Langues : Anglais (eng) Catégories : Additifs Basses températures Détergents Enzymes Une enzyme est une protéine dotée de propriétés catalytiques. Pratiquement toutes les biomolécules capables de catalyser des réactions chimiques dans les cellules sont des enzymes ; certaines biomolécules catalytiques sont cependant constituées d'ARN et sont donc distinctes des enzymes : ce sont les ribozymes. Une enzyme agit en abaissant l'énergie d'activation d'une réaction chimique, ce qui accroît la vitesse de réaction. L'enzyme n'est pas modifiée au cours de la réaction. Les molécules initiales sont les substrats de l'enzyme, et les molécules formées à partir de ces substrats sont les produits de la réaction. Presque tous les processus métaboliques de la cellule ont besoin d'enzymes pour se dérouler à une vitesse suffisante pour maintenir la vie. Les enzymes catalysent plus de 5 000 réactions chimiques différentes2. L'ensemble des enzymes d'une cellule détermine les voies métaboliques qui peuvent avoir lieu dans cette cellule. L'étude des enzymes est appelée enzymologie. Les enzymes permettent à des réactions de se produire des millions de fois plus vite qu'en leur absence. Un exemple extrême est l'orotidine-5'-phosphate décarboxylase, qui catalyse en quelques millisecondes une réaction qui prendrait, en son absence, plusieurs millions d'années3,4. Comme tous les catalyseurs, les enzymes ne sont pas modifiées au cours des réactions qu'elles catalysent, et ne modifient pas l'équilibre chimique entre substrats et produits. Les enzymes diffèrent en revanche de la plupart des autres types de catalyseurs par leur très grande spécificité. Cette spécificité découle de leur structure tridimensionnelle. De plus, l'activité d'une enzyme est modulée par diverses autres molécules : un inhibiteur enzymatique est une molécule qui ralentit l'activité d'une enzyme, tandis qu'un activateur de cette enzyme l'accélère ; de nombreux médicaments et poisons sont des inhibiteurs enzymatiques. Par ailleurs, l'activité d'une enzyme décroît rapidement en dehors de sa température et de son pH optimums. Formulation (Génie chimique) Nettoyage Peptidases Produits nettoyants Rhéologie Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Washing laundry at low temperature of only 30°C or even 20°C has big advantages : the significantly lower energy requirement benefits the consumer as well as the environment. In the meantime, single-dose liquid laundry detergents - so-called caps or pouches - are available that provide very good washing performances despite the low washing temperature. The sales growth for these products is especially large in the European market because caps are very easy and convenient to use by the consumer. The innovative caps contain highly concentrated formulations. This results in less weight, volume, and packaging, which is appealing to the consumer. All these properties are an excellent match for the e-commerce trend. In this context, BASF has formulated and tested laundry detergents that significantly improve the washing performance in the low temperature range. This article reviews Lavergy® Pro 104 L, an enzyme that belongs to the class of proteases, Sokalan® HP 20, a polymer that prevents graying and has a synergistic cleaning effect, as well as the rheological additive Rheovis® AT 120. With these products, BASF offers a system solution that achieves excellent results. Note de contenu : - Polymer-based performance booster - Protease-based performance booster - Synergistic effect boosts performance - Viscosity - FIGURES : 1. Test formulation A (TF A) including the addition of Sokalan HP 20 achieve better washing results in all stains - 2. The measured result sincluding Sokalan HP 20 also demonstrate a visually noticeable improvement - 3. In test formulation B (TF B), the washing performance can be maintained using Sokalan HP 20 despite a 5% reduction in the active concentration of linear alkylbenzene sulfonate (LAS) - 4. The graph clearly shows the additional cleaning effect the enzyme Lavergy Pro 104 L has on the washing performance. Despite lowering the washing temperature by 10°C (from 30°C to 20°C), the washing performance is significantl increased - 5. Even at the signifcantly shortened washing time, the cleaning performance of the formulation containing Lavergy Pro 104 L at 20° was significantly better than at 30°C - 7. Lavergy Pro 104 L maintained significant its activity for the 21-day time period at 30°C - 8. The various stains under investigation - 9. The gray line represents the expected performance. The green line reflects the actual washing performance - 10. Rheovis AT 120 - 11. Viscosity curve as a function of the pH value - 12. Viscosity curve at pH 8.5 as a function of the concentration - TABLES : 1. Composition of the test formulations - 2. Results of the tes formulations, A2 and A2E - 3. Tests to investigate the improved washing performance via synergistic effects En ligne : https://drive.google.com/file/d/1YOFsAeI1mudIJVPGgC6SHFH5J0UvEgRn/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30679 [article]

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Impact of the new chelating agents GLDA and MGDA in detergents / Jan Seetz in SOFW JOURNAL, Vol. 144, N° 5 (05/2018)  

[article]  inSOFW JOURNAL > Vol. 144, N° 5 (05/2018) . - p. 10-16 Titre : Impact of the new chelating agents GLDA and MGDA in detergents Type de document : texte imprimé Auteurs : Jan Seetz, Auteur ; Gabi Bongen, Auteur ; Klaus Henning, Auteur Année de publication : 2018 Article en page(s) : p. 10-16 Langues : Anglais (eng) Catégories : Chélates Détergents Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The modern strong chelating agents GLDA (glutamic acid N,N-diacetic acid) and MGDA (methylglycinediacetic acid) are quickly biodegradable and are not labelled as dangerous. They have the ability to bind calcium and magnesium ions, which bind most of the stains to the surface. These chelates are also able to remove hard water carbonate scales, transforming them into water soluble metal chelates and will prevent the inactivation of anionic surfactants by water hardness cations, which will greatly improve the detergency power. Note de contenu : - Hard water scale - Chelating agents of the 1st and 2nd generation - Efficacy spectrum of chelating agents - Dissolving hard water scale (CaCO3) - Inactivation of anionic surfactants by water hardness - Bond strength of chelating agents for metal ions - Water softening - Improved product performance - Car washing cleaners - Kitchen cleaners - Laundry detergents - Dish detergents - Hand dish detergents - FIGURES : 1. Improvement of detergency power by a chelating - 2. Structural chemical forulas of 1st and 2nd generation of chelating agentson - 3. Molar efficiency of CaCO23 by various chelating agents (pH 8, 10 minutes exposure time) - 4. Water hardness raises the Krafft temperature of anionic surfactans to a high level - 5. Conditional stability constants K' of calcium chelates - 6. The necessary amount for water softening is determined by the strength of metal chelate formed - 7. Improved non-mechanically removal of automotive dirt by rinsing with a cleaning solution containing the strongchelating agents MGDA and GLDA compared to weak chelating agents citrate and STPP - 8. Determination of the cleaning efficiency of kitchen cleaners in scrub test on gravy soil (soil 1, tests : Julius Hoesch, Düren) - 10. Determination of cleaning efficiency with narrow ranged nonionic C9-C11 4 E0 (Berol 260), chelating agent GLDA and non-aqueous solvent PnP (Formulations JH #1 and JH #2 Julius Hoesch, Düren ; test : Julius Hoesch, Düren) - 11. Solubility of sodium chelates depending on the sodium hydroxide concentration - TABLES : 1.Grading, composition and product characteristic of tested kitchen cleaners - 2. Performance improvement of kitchen cleners by narrow ranged nonionic C9-C11 4 EO (Berol 260), chelating agent GLDA and non-aqueous solvent PnP (Formulations JH #1 and JH #2 Julius Hoesch, Düren ; test : Julius Hoesch, Düren) En ligne : https://drive.google.com/file/d/1GomklaOhESDkOIv7aeMdbTzNOW7yPo_q/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30680 [article]

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Cleansing formulations and their effect on skin / Carmen Martinez Lerga in SOFW JOURNAL, Vol. 144, N° 5 (05/2018)  

[article]  inSOFW JOURNAL > Vol. 144, N° 5 (05/2018) . - p. 18-22 Titre : Cleansing formulations and their effect on skin Type de document : texte imprimé Auteurs : Carmen Martinez Lerga, Auteur Année de publication : 2018 Article en page(s) : p. 18-22 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques Formulation (Génie chimique) Hygiène Ingrédients cosmétiques Lipides Peau -- Nettoyage Peau -- Soins et hygiène pH Surfactants Index. décimale : 668.5 Parfums et cosmétiques Résumé : Recent trends of natural products in the Personal Care industry are growing. Public perception is that because a product is natural, on top of being better for the environment, it will have certain benefits. In this article we will discuss the perception of what is a natural ingredient and the use of natural and non-natural ingredients in cleansing formulations and their effect on the skin. Personal care industry has heavily invested in the promotion of several types of cleansers : Soaps, syndets and liquid cleansers among many others. The promotion of certain benefits of particular formulations has also been directed to the defamation of other products, particularly when talking about syndets and soaps. Soaps' alkaline pH and syndets allergenic ingredients have been under discussion for years. Cleansing formulations need to be looked at in their totality and evaluated in relation to the end user. Soaps, syndets and liquid cleansers ail have positive and negative effects on the skin barder. Many surfactants can be irritating and harmful for the skin if they are not formulated correctly. Formulations with humectants and lipidic content will be milder for the skin. These nourishing and moisturising ingredients will help reduce the potential damage that any chemical could inflict on the skin. Note de contenu : - Natural ingredients - Cleansing formulations : Soaps - Syndet bars - Liquid cleansers - Oil free cleansers - Cleansing creams - Healthy skin and atopic skin : Structure - Lipid function in the SC - PH of the SC - Figure : Lipid bi-layers are present in the corneocytes to protect the cell. This is formed by a lipidic lamellar layer formed of alternate spacing of water and a lipid mixture made up of ceramides, cholesterol, fatty acids and cholesterol esters - Questionable objectivity - Surfactants and other ingredients effect on the skin En ligne : https://drive.google.com/file/d/1A7sXjxdVcy6whOk6ueyhVIYvLVUC89BL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30681 [article]

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Substantiation of antibacterial/antimicrobial claims for cosmetic products / Barbara Tyralla in SOFW JOURNAL, Vol. 144, N° 5 (05/2018)  

[article]  inSOFW JOURNAL > Vol. 144, N° 5 (05/2018) . - p. 24-27 Titre : Substantiation of antibacterial/antimicrobial claims for cosmetic products Type de document : texte imprimé Auteurs : Barbara Tyralla, Auteur ; Andrea Keck-Wilhelm, Auteur ; Anne-Marie Burkhard, Auteur ; Bernhard Fellenberg, Auteur ; Otto Sponheimer, Auteur ; Jürgen Rabenhorst, Auteur ; Joelle Nussbaum, Auteur Année de publication : 2018 Article en page(s) : p. 24-27 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens Cosmétiques -- Normalisation Essais (technologie) Industrie cosmétique -- Législation -- Pays de l'Union Européenne Index. décimale : 668.5 Parfums et cosmétiques Résumé : A product applied on external parts of the human body, which is claimed as antibacterial or antimicrobial, can, from the legal point of view, be classified as either biocidal or as a cosmetic product. If, however, the claim or advertising explicitly refers to the treatment or the relief of an illness caused by bacteria/microorganisms the product has to be classified as a drug. It is of critical significance to differentiate between a cosmetic product and a biocidal product that claims for the antimicrobial efficacy can be judged as secondary compared to the main cosmetic purposes in the sense of Art. 2, 1(a) of the Regulation (EC) No 1223/2009. If the product is classified as cosmetic product, adequate and verifiable proof of the claimed antimicrobial efficacy has to be provided with regard to the provisions made in Annex I, 3 of the VO (EC) 655/2013. Detailed legal requirements or binding normative standards regarding the kind and extent of such proof is, however, missing for cosmetic products. This position paper shall give proposals and assistance for choosing appropriate proof. Note de contenu : - Requirements and standards of other areas - Recommendations for testing cosmetic products for which a microbicidal, microbiostatic or antibacterial resp. antimicrobial efficacy is claimed - Table 1 : Requirements and norms in non-cosmetic areas - Table 2 : Recommendations for the selection of test-methods and relevant test-organisms of specific products or application areas and recommended contact-times En ligne : https://drive.google.com/file/d/1f563ycn7Junqz80JYff8OT2eTjSMs54w/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30682 [article]

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Preservative efficacy test for cosmetic products - How to reach a valid efficacy statement / Ulrich Eigener in SOFW JOURNAL, Vol. 144, N° 5 (05/2018)  

[article]  inSOFW JOURNAL > Vol. 144, N° 5 (05/2018) . - p. 28-32 Titre : Preservative efficacy test for cosmetic products - How to reach a valid efficacy statement Type de document : texte imprimé Auteurs : Ulrich Eigener, Auteur Année de publication : 2018 Article en page(s) : p. 28-32 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Conservateurs (chimie) Cosmétiques -- Analyse Cosmétiques -- Conservation Tests d'efficacité Index. décimale : 668.5 Parfums et cosmétiques Résumé : The preservative efficacy test is a test method that is used to evaluate microbiological product stability (preservative efficacy). The performance of such test is also part of the legal requirements to prove the adequate microbiological quality and product safety of cosmetic products. It must, however, be emphasised that the efficacy statement provided in such tests cannot be seen as a proof of microbiological product safety. Historical data show that attempts to improve the validity of the efficacy statement by changing the test method or the required death kinetics have been disappointing. This paper describes a method that can lead to an improved efficacy statement. The principle is to use the preservative efficacy test as part of the microbiological quality management (MQM) system in such way that data and knovvledge gained from the system are used to adapt the test to the actual situation. Efficacy testing, as specified in ISO 11930, can be used as the basic test method. The exact test protocol, however, must be applied, the spectrum of test-microorganisms should be extended and subsequent repetitions of the test are needed in case of relevant changes (formula, raw materials, production process). ln the event of specific problems, additional testing can be conducted (e.g., in-use tests, repetitive PET). The implementation of an MQM-system is a prerequisite for the success of this approach. Note de contenu : 1. PRESERVATIVE EFFICACY TEST AND MICROBIOLOGICAL PRODUCT SAFETY 2. INFLUENCES ON THE EFFICAY STATEMENT OF THE PRESERVATIVE EFFICACY TEST : Test performance - Changes to the manufacturing process - Microorganisms from the practice environment 3. SYSTEM APPLICATION AND PRESERVATIVE EFFICACY TEST : Test samples for the preservative efficacy test - Figure : Influences on the PET - to be observed for reaching a better efficacy statement - Table : Information flow between different organisational units : data and knowledge relevant for performing and evaluating the PET (examples) En ligne : https://drive.google.com/file/d/1PWBUWDFv2SPExYuJBZC1vGqg7wyYTZJA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30683 [article]

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