Heavy metal meets its match: two new materials strip pollutants from toxic wastes

Article Abstract:

Research into the potential of stable mesoporous silica as a viable waste-site remediation technology has gone into two directions, both of which offers selective uptake of pollutants. One involves the use of sulphur compounds that take in mercury, silver and lead, while another used biological molecules for the controlled release of pesticides.

Usage, Equipment and supplies, Prevention, Silica, Waste disposal sites, Silicon dioxide, Trace pollutants, Micropollutants

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Envisioning speech

Article Abstract:

Computer scientist Raman, who became blind at age 14, designed software for blind computer users after discovering that his speech synthesizer was ineffective at reading mathematical expressions. His programming language controls how the synthesizer speaks various phrases and texts.

Software, Biography, Interview, Voice synthesis, Speech synthesis, Mathematical notation, Raman, T.V.

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Speech without accountability

Article Abstract:

The ethics of the tamperproof, anonymous Web publishing program Publius defend it against charges that its untraceable speech could protect criminal activities.

Data encryption, Freedom of speech, Anonymous writings

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