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Îmbătrânirea Uleiurilor Esențiale

Îmbătrânirea Uleiurilor Esențiale

Peroxydation et réaction intra-moléculaire Les huiles d’olive deviennent rance au cours du temps. Le rancissement est une modification chimique des structures moléculaire des huiles végétales. Les mêmes mécanismes chimiques opèrent aussi sur les huiles essentielles. La présence d’oxygène naturellement dissous dans les huiles, initie ces réactions chimiques. Elles s’accélèrent en présence de lumière, d’air, de sauts de température ou de diverses impuretés. Le mécanisme réactionnel de ce « vieillissement » se divise en deux étapes: la peroxydation et les réactions intramoléculaires (ou phase de propagation). La littérature scientifique décrit plusieurs exemples de peroxydation. Voici celui du linalol abondemment présent dans les huiles essentielles. (Exemple: lavande, lavandin, thym à linalol, bois de rose, sauge sclarée, etc). Dans ce shéma, le linalol subit en premier une peroxydation. Elle produit un nouveau composé: le 7-dydroperoxy-3,7-dimethyl-octa-1,5-diene-3-ol.
Sefr 1

Sefr 1

Sefr 1
Acid stearic de parafină 2

Acid stearic de parafină 2

Stearic acid : Of the wax; It prolongs the burning time, makes it easy to get out of the mold, and prevents it from making soot while burning. The proportion that should be added to the candle changes seasonally. It is recommended to use 15% in summer and 10% in winter
Mătase

Mătase

Satin paint low gloss to protect and decorate interior and exterior surfaces.
Ulei de arbore de ceai 100ml vivio

Ulei de arbore de ceai 100ml vivio

Tea tree oil has a pleasant, aromatic smell. It is obtained from tea tree leaves found in Australia. The name of the oil, as well as the tree itself from which it is produced, has nothing to do with tea. The plant was called a tea tree by Captain Cook, who, like Aborigines, used her leaves for brewing a drink replacing tea. The good effect of tea tree leaves was used by Aborigines who used them to disinfect and treat wounds. Nowadays, this tree is cultivated on a large scale due to the high interest in essential oil obtained from this raw material, which contains over 90 active compounds. Tea pains are obtained in the distillation process with water vapor steam fresh leaves and branches of tea tree. It is characterized by a fresh, herbal smell and a colorless or light yellow color. The pain is used in aromatotherapy as one of the strongest antiviral, antibacterial and antifungal ingredients. Supports the immune system, therefore it is recommended for colds, flu and Qatar.
Ulei de susan – 5L

Ulei de susan – 5L

L’huile de sésame produite en 1ère pression à froid est une huile diététique et cosmétiques. Cette huile aux douces saveurs mentholées peut être utilisée en cuisson et en assaisonnement. Elle accompagnera le taboulé, les crudités, la salade verte (feuille de chêne, Scarole…). Elle est également idéale pour vos pâtisseries comme le gâteau au chocolat. Poids:4,800 kg
Amincat bdmaee - Catalizatori de Amini

Amincat bdmaee - Catalizatori de Amini

AminCat BDMAEE is a colourless to light yellow liquid which has C8H20N2O as chemical formula. It is a tertiary amine and one of the most active amine blowing catalysts available. AminCat BDMAEE is also known as Bis[2(N,Ndimethylamino)ethyl] ether and N,N,N’,N’tetramethyl2,2′oxybis(ethylamine). Availability Europe and United States Provided AminCat BDMAEE is on stock in our local warehouses our lead time is about one week if delivered in 170 KG steel drums. Canada, South America, South Africa and other markets can also be served, please contact our sales department for more details. CAS number:3033-62-3 EC number:221-220-5 HS code:2922 19 00 Assay:≥98.50 % Water:≤0.30 % Density:0.87 @ 20 °C Flash point:68 °C @ 99.86 kPa ± 4.07 Partition coefficient (log pow):-0,54 Solubility in water:1 000 000 mg/L @ 25 °C Vapour pressure:0.99 hPa @ 25 °C Viscosity:0.05153 mm2/s @ 20 °C
Defecțiune a materialelor - Patologie a materialelor

Defecțiune a materialelor - Patologie a materialelor

La défaillance, réside dans le fait qu'un mécanisme, un appareil, un dispositif ou encore un matériau cesse brusquement de fonctionner correctement. Cela se traduit par une détérioration du produit, une altération de sa fiabilité, de sa solidité et surtout de ses performances. POLYMEX intervient dans le cadre d'expertise de matériaux, en réalisant une analyse des défaillances permettant de comprendre l'évènement ou l'historique qui a abouti à la défaillance. Vous avez devant vous un sol de garage de type résine Epoxy qui présente de large fissure, il se peut que la fissure intervienne suite à un non respect de la stœchiométrie de réactif Base/Durcisseur. Une quantification par Py/GCMS permettra de répondre à cette problématique. Une large zone de carreaux se décolle dans votre piscine ? Des analyses par Py/GCMS permettraient de mettre en évidence des molécules à l'origine de la non adhérence (surfactants, ester d'acide gras…)...
SHILAJIT 60ML LIQUID

SHILAJIT 60ML LIQUID

YOOKA Liquid Shilajit è un integratore alimentare 100% vegano, prodotto artigianalmente con autentico Shilajit coltivato tra i 5100 e i 5500 metri sulle montagne dell'Himalaya pakistano. Questo Shilajit liquido è ricco di acidi fulvici (minimo 70%) e di oltre 85 minerali essenziali, grazie all'essiccazione naturale al sole per 45-60 giorni; A differenza dei metodi industriali, il nostro Shilajit è purificato da 40 filtrazioni con filtri nano-purificati per garantire la massima purezza. Le nostre bottiglie sono realizzate in vetro alimentare per preservare la qualità dello Shilajit liquido. Ogni flacone da 60 ml contiene una soluzione liquida di Shilajit puro e acqua di sorgente dell'Himalaya (5% del contenuto), facile da usare; Per godere dei benefici dello Shilajit, si consiglia una dose da 5 a 10 gocce in una bevanda calda o fredda, due volte al giorno.
Analiza uleiului de cânepă - Ulei de cânepă

Analiza uleiului de cânepă - Ulei de cânepă

Analysis of hemp oil. Essential oil. Fatty acids composition. Terpene composition. Linolenic acid. Acid and peroxyde value.
SHILAJIT 60ML lichid

SHILAJIT 60ML lichid

YOOKA Liquid Shilajit is a 100% vegan food supplement, handcrafted from authentic Shilajit harvested between 5100 and 5500 meters above sea level in the Pakistani Himalayan mountains. This liquid Shilajit is rich in fulvic acids (minimum 70%) and more than 85 essential minerals, thanks to natural drying in the sun for 45 to 60 days. Unlike industrial methods, our Shilajit is purified through 40 filtrations using nano purified filters to ensure maximum purity. Our bottles are made of food grade glass to preserve the quality of liquid Shilajit . Each 60ml bottle contains an easy-to-use liquid solution composed of pure Shilajit and Himalayan spring water (5% of the content).