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in their chain structures are the centres of attack. ultraviolet rays interact with these bonds to form free radicals , which then react further with oxygen in the atmosphere, producing carbonyl groups in the main chain. the exposed surfaces of products may then discolour and crack, and in extreme cases...
research six ways to tackle the plastic puzzle in the food sector data growth to double power demand of data-driven technology by 2030 why construction prices are surging robots gaining ground on construction sites increase in residual value of electric cars boosted by greater range elderly care and...
while battling cancer education three students win morocco library project's short story contest education regional academy: baccalaureate recorrection shows no grading errors education students in fez protest 'inaccurate' correction of baccalaureate exams western sahara news polisario reports covid- cases...
edit ] cloisonne beads beads can be divided into several types of overlapping categories based on different criteria such as the materials from which they are made, the process used in their manufacturing, the place or period of origin, the patterns on their surface, or their general shape. in some cases...