Produse pentru alcool etilic de origine agricola 96 (2)

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.
Fluid Col : Aditiv pentru producerea de conglomerate reoplastice, turnabile și anti-retractare

Fluid Col : Aditiv pentru producerea de conglomerate reoplastice, turnabile și anti-retractare

Fluid Col Multi-purpose additive powder, to add to a suitable mixture of binders and aggregates, for the on-site production of mortars, grouts and concretes that are self-levelling, rheoplastic, controlled shrinkage or moderately expansionary, high mechanical strength, chemical and waterproofing. The physical-chemical action of Fluid Col is an interaction of positive contributions and modifications: drastic reduction of the A/C ratio, shrinkage-resistant action, superpozzolanic action and reaction of ultrafine fillers (MICROSIL 90), which transforms unstable, soluble, readily reactive calcium hydroxides into stable, insoluble, chemically and mechanically resistant hydrous calcium silicates. Preparation of mortars, grouts, rheofluid concretes, shrinkage-compensated or moderately expansionary, high mechanical, watertightness and chemical stability performance, for structural slubs, anchoring machines, road joints, etc. Add the product in a concrete mixer, mixer truck or mixer, together with the remaining anhydrous components of the mixture: cement and aggregates, any polypropylene and/or steel fibres, etc. The indicative dosage, depending on the type of conglomerate to be packaged and its purposes, varies between 12% and 15% of the weight of the cement. After a first mixing, add the mix water and mix thoroughly, until you obtain a homogeneous whole and free of lumps. The cement dosage must not be less than 350 kg/m³. Fluid Col is perfectly compatible with the addition of fibre d steel and/or polypropylene fibres READYMESH, for the preparation of conglomerates composite s, fibre reinforced. Add 10 - 15% of Fluid Col to the weight of the cement present in the mixture. Bag 25 kg - Pallet: 50 x (Bag 25 kg)