#Photoflow substitute windows

The alkoxybutenolide structure has an embedded acrylate functionality (depicted in pink in Fig. The furan moiety of furfural undergoes a cycloaddition with 1O 2 and transforms quantitatively into hydroxybutenolide, which can be readily converted into various alkoxybutenolides by heating with the appropriate alcohol ( Fig. This particularly clean process involves triplet-triplet annihilation of the excited photosensitizer and molecular oxygen. The next step is a photooxidation based on singlet oxygen ( 1O 2), which is generated using visible light and a catalytic triplet sensitizer. The starting point is biomass, e.g., lignocellulose, which is readily converted into valuable platform chemicals like furfural using acid-mediated dehydration ( Fig. 1A, implementing the Principles of Green Chemistry ( 26), we take an integrated approach using a renewable resource, green transformations, intrinsic functionality for polymerization, and tunable materials properties of the coatings. Here, we demonstrate the formation of high-performance coatings using lignocellulose-derived alkoxybutenolides as an alternative for acrylates while using a photooxidation process with visible light and oxygen in a scalable flow system to access the monomers. Although bio-based polyesters are now well established ( 9), limited reports on (co)polymerization of acrylate analogs did not reveal materials function ( 24) or indicated large differences in reactivity compared with common acrylates ( 25). Despite progress toward the use of renewable feedstock for fuels ( 8), polymers ( 9– 11), and specialty chemicals ( 12, 13), as well as recent advances in photoredox ( 14) and electrochemical conversions ( 15, 16) aiming at the design of benign and low waste transformations ( 17, 18), direct biomass-derived alternatives for acrylate-based coatings remain largely unexplored ( 18– 23). Global production of acrylate esters exceeds 3.5 million metric tons a year ( 7), and it is evident that sustainable alternatives, maintaining the favorable properties of acrylate-based materials, can be highly transformative in tomorrow’s chemistry and materials.

In the multistep processes that are typically used nowadays, middle- to long-chain fossil-based hydrocarbons are converted into olefins via cracking, further oxidized and derivatized into acrylates, which are subsequently polymerized to yield a wide range of plastics, resins, and coatings ( Fig. However, the environmental awareness and the need to design the green chemistry of the future based on sustainable materials demand for renewable resources and waste-free, low-energy chemical conversions without compromising the function and performance of the final products ( 3– 5). The polymers and resins in coatings are manufactured using petrochemical feedstock ( 2).

There are up-to-date packages available for Ubuntu 14.04/14.10 and Mint 17/17.Coatings are omnipresent in daily life, indispensable in construction and applied to enhance properties and durability of numerous products, ranging from cans to cars ( 1). Installing from PPA (Ubuntu Linux and derivate distributions)

#Photoflow substitute windows

Up-to-date Windows and OSX installers are available from the releases web page. You can follow the development of photoflow and learn about its usage in the dedicated blog: Windows and OSX installers Support for common photo editing tools: levels, curves, brightness-contrast control, blurring, sharpening, cropping, resizing, colorspace conversions, etc., all implemented in the form of image layers.

Support for layer grouping and layer masks.Fully color managed workflow: user-defined input, work and output profiles, soft-proofing, etc.Allows to load and edit images of arbitrary size, thanks to the underlying rendering engine based on the VIPS library.Support for 8-bits and 16-bits integer as well as 32-bits and 64-bits floating point precision, selectable at runtime and on a per-image basis.Fully non-destructive, layer-based photo editing workflow with realtime preview of the final image.The aim of the project is to provide a fully non-destructive photo retouching program with a complete workflow including RAW image development.