Drywall is a common wall material in modern homes and is one of the most difficult materials to get a towel bar securely fastened to.
Paper based artworks are probably ones of the most difficult materials to restore, because of their complexity and fragile structure.
The most difficult materials to model were nylon webbing and polypropylene (dried plastic tubes) where a piecewise modeling strategy was required to fit B. thuringiensis Al Hakam on polypropylene.
Thus, hemp was clearly the most difficult raw material for biological treatments.
Alternatives include a permanent abandonment of glass recycling, which has proven to be the most difficult and costly material to reprocess.
Inconel 625 is known to be the most difficult to cut material and processing of which is a major challenge to the manufacturing sector.
The Technical Review Board, which holds public meetings about three times a year, on Wednesday therefore focused on alternative strategies like building a new class of reactors that could accept the "spent" fuel from existing reactors, deriving some energy from the wastes and breaking down the most difficult, long-lived materials into elements that are easier to handle.
In this study, the possibility of using a c-BN-coated tap for cutting a beta-type titanium alloy which has been known as one of the most difficult to cut materials was investigated.
Sapphire, widely used in high-speed integrated-circuit chips, thin-film substrates, and various electronic components, is regarded as one of the most difficult to cut materials owing to its great hardness and low fracture toughness.
But in the world of child pornography, as in any culture of collecting, the material most difficult to obtain is the most highly prized.
