All posts tagged: residue

Drug residue can be detected in fingerprints left at crime scenes

Drug residue can be detected in fingerprints left at crime scenes

A researcher uses a chemical to extract drug residue from fingerprints Loughborough University Forensic scientists have developed a new technique that can detect drug and explosive residue on fingerprint samples from crime scenes. “That information, the presence of drug particles, is an almost untapped resource,” says James Reynolds at Loughborough University in the UK. That is because investigators use thin gelatine layers, called gel lifters, to lift fingerprints. These introduce chemicals to samples, making it difficult to identify trace amounts of drugs or explosives on them. … Source link

Varaha helps Indian farmers reduce climate-harming practices like burning crop residue and flooding rice fields

Varaha helps Indian farmers reduce climate-harming practices like burning crop residue and flooding rice fields

Varaha has attacted investor interest as an end-to-end developer for carbon credits that it generates by working with thousands of smallholder farmers yielding crops on a total land of over 700,000 acres across India, Bangladesh, Nepal, and Kenya. The voluntary carbon offset market will reach $250 billion by 2050 from $2 billion in 2020, according to estimates made by Morgan Stanley. However, awareness of the monetary and environmental benefits associated with carbon credits is low. Generally speaking, carbon offsets are granted when an organization or company engages in a practice that reduces CO2 emissions, such as replacing fossil-fuel-based energy sources with renewable energy sources, or (rarely) removes CO2 from the atmosphere through technology like carbon capture. Polluters then purchase these offsets to counter the CO2 they’re emitting, which lets them claim to be reducing their emissions or heading toward “net zero” carbon emissions. This has become increasingly important as awareness of CO2’s role in global warming has grown among the public and among public-company investors, and as governments have begun to face political pressure to …

Missing bullets can be identified by ricochet residue at crime scenes

Missing bullets can be identified by ricochet residue at crime scenes

Analytical chemistry could help forensics team gain more information from crime scenes Orange County Register/MediaNews Group via Getty Images The brand of bullets used in a crime could be identified even when no bullets are found at the scene, by analysing tiny metal scraps they left behind. Forensics experts may attempt to link a suspect to a crime by analysing bullets or spent bullet casings found at the crime scene and demonstrating they were fired by the suspect’s gun. But doing so when the bullets are not present at the scene – for instance, when they have been removed… Source link