Siccative

Sikkativ, n. siccative, drier, -firms, m. sicca tive varnish, -mittel, n. siccative, drier, -pulver, n. drying powder, specif, manganese borate. 

First, it is not a common molecule on earth, not being used in laboratory for any synthesis. Second, it is cyclic, which was and still is a rare feature among small interstellar molecules identified up to day only SiCC and C3H present the same characteristic. 

Driers - Dehydrating agents - Desiccants - Siccatives Emulsifiers - Co-emulsifiers Fatigue agents Fibres... 

Known emissions from the production stage, which are not covered by characterisation factors and which may contribute significantly to the toxicity impact categories, include emissions of components occurring in small quantities in the raw materials (typically well below 5%) like siccatives (organic metal compounds), softeners (phthalates), antioxidants (aromatics) and wetteners (surfactants). Due to lack of readily available knowledge of their exact identity and/or lack of readily available data on their inherent environmental properties, it has not been possible to include them in the case study. 

Ink component (and their precursors) production siccatives, antioxidants, pigments, dyes, etc. 

The proteinaceous binders are one of the main constituents of the wide range of organic materials and are a central component of the artist s palette. In the technique referred to as tempera, artists commonly used proteinaceous binders derived from egg, milk or casein, and collagen glues derived from animal skins or bones. These can be used independently, mixed together, or in a more complex mixture with siccative oils (as in the tempera grassa technique) or plant gums. 

A. Piccirillo, D. Scalarone and O. Chiantore, Comparison between off line and on line deriva tisation methods in the characterisation of siccative oils in paint media, J. Anal. Appl. Pyrol., 74, 33 38 (2005). 

S. Prati, S. Smith and G. Chiavari, Characterization of siccative oils, resins and pigments in art works by thermochemolysis coupled to thermal desorption and pyrolysis GC and GC/MS, Chromatographia, 59, 227 231 (2004). 

Metallic compositions serving as siccatives catalyze the well-known oxidation and polymerization of oil in paints and other finishes. Likewise, ferrous and other metallic objects boost self-heating in piles of lignocellulosics. Among the known catalyzing substances are iron sulphides and iron oxides from combustion gases of... 

Binoxide of menganese has been employed for increasing tho siccative quality of linseed oil and the artificial binoxids, mixed with the same oil, has been... 

The cyclopropenium cation (45, M = C) is a well established aromatic system with a high aromatic stabilization energy of 58.7 kcalmol-1 [equation 18, M = C, at B3LYP/6-311++G(2d,2p)]70. What happens when one carbon atom is substituted by silicon At HF/STO-2G the monosilacyclopropenium cation, 46, has a rather delocalized structure with r(C-C) = 1.393 A, r(C-Si) = 1.722 A and with CSiC and SiCC bond angles of 46.3° and 66.9°, respectively413. However, according to equation 19 which measures the effect of delocalization, 46 is destabilized by 11 kcalmol-1 (HF/3-21G//HF/STO-2G) while 45, M = C is stabilized by 36 kcalmol-1. Unfortunately, this study used a very low computational level and should be repeated using more reliable methods. 

CO SiCC HNCS h2c2o NH2CHO CH3CHO ch3ch2cn ... 

The calculations show that 1- and 2-silaallenes have a linear SiCC skeleton (and are planar at Si in 62, M = Si) and the nonlinearity found in the X-ray structure of Tip2Si=C=C(Bu-t)2 is therefore probably not an inherent property of the silaallene skeleton, but is caused by the steric effects of the bulky substituents or by crystal packing forces. This is reasonable in view of the very flat calculated PES where only 1 kcalmol-1 is... 

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