objective: one complication of fixed orthodontic treatment in patients with poor oral hygiene is development of demineralized enamel lesions compromising esthetics. this study aimed to review preventive measures and treatment of white spot lesions (wsls) in patients with fixed orthodontic appliances. review of literature: in this review study, pubmed and google scholar databases were searched f...

thermal decomposition of two coal samples obtained from top seam sibi (tss) and sore range quetta (srq) coal fields in their raw and acid washed forms were carried out in an open type tubular pyrolyzer coupled to a gas chromatograph with fid. elemental analyses were carried out with scanning electron microscope-energy dispersive x-rays (sem-edx) analyzer. effect of inherent mineral contents on ...

Shrimp shell waste contains chitin compounds which are useful in the food sector. The synthesis of into chitosan can be as an edible coating on tomatoes. research was conducted three stages: manufacturing process, antibacterial test chitosan, and application manufacture consisted isolation (deproteination, demineralization, depigmentation, deacetylation) characterization (moisture content, ash ...

Wild Silkmoth cocoons are difficult or impossible to reel under conditions that work well for cocoons of the Mulberry silkmoth, Bombyx mori . Here we report evidence that this is caused by mineral reinforcement of Wild Silkmoth cocoons and that washing these minerals out allows for the reeling of commercial lengths of good quality fibers with implications for the development of the "Wild Silk" ...