The paper focuses on a possibility to exploit the waste from a process of date fruit processing – the plant Phoenix dactylifera – represented by a stone and residues of flesh in a form of biocomposites with a technologically undemanding process of a preparation.
Among other ideas the consultant will likely be asked to assess is a proposal to build a trash plant within New York City that would heat waste to such a high temperature -- perhaps 30,000 degrees -- that the garbage would break into elemental components, creating byproducts of natural gas and a stone-like residue.
The old stones with starch residues from nuts, the researchers said, were the earliest strong evidence of chimp tool use, and the finding suggested that chimps had learned the skill on their own, rather than copying humans.
These representative samples were air-dried at room temperature for 72 h, ground and sieved through 2 mm mesh to remove plant roots, stones and organic residues.
Combustion tests show that among the tested date palm residues, date stone may be the promising biofuel for the design of combustion processing system.
While radiocarbon dating of blood residue on stone artefacts has been published previously (Loy 1987, 1990 , 1993 Loy et al., 1990; Nelson et al.1986), this paper reports on an experiment designed to assess the possibility of directly dating residues on stone artefacts by accelerator mass spectrometry (AMS) based radiocarbon measurements.
He hopes that further exploration, including detailed chemical analysis of the residues from nearby Stone Age campfires, will help provide an answer.
The cleaning tests show the absence of macroscopic visible residues on the stone specimens, but a crucial point for the gels used as cleaning systems is whether micro-residues are retained on the substrates or not.
All stones are detectable on CT scans except very rare stones composed of certain drug residues in the urine, such as from indinavir.
