Glowing fingerprints. Free Technical Library News

NEWS OF SCIENCE AND TECHNOLOGY, NOVELTY IN ELECTRONICS
Free technical library / timeline

Glowing fingerprints

01.11.2015

When the Australian scientist Dr. Kang Liang was robbed, the police tried to find the fingerprints of the perpetrators in his house, but found nothing. Looking at this procedure, the doctor realized that the powder used for fingerprinting was not very effective, and invented a radically new method for finding fingerprints.

Liang, together with scientists from the Australian State Association for Scientific and Industrial Research, developed a liquid that, when it hits the site of a fingerprint, begins to glow in the ultraviolet with a green neon light. Thirty minutes after application, the organometallic crystals contained in the liquid coat the proteins, fatty acids and peptides remaining in the prints, and thus repeat the papillary pattern of the fingers. A luminous copy can be photographed and used in criminological analysis.

Liang's new method is much faster and cleaner than using the traditional powder, and organometallic crystals are fairly cheap and readily available. You can even change the chemical solution to make the prints glow in different colors.

<< Back: Single-chip system Ambarella S3L 01.11.2015

>> Forward: Mitsubishi Electric technology monitors the attentiveness of the driver 31.10.2015

Latest news of science and technology, new electronics:

The existence of an entropy rule for quantum entanglement has been proven 09.05.2024

Quantum mechanics continues to amaze us with its mysterious phenomena and unexpected discoveries. Recently, Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lamy from the University of Amsterdam presented a new discovery that concerns quantum entanglement and its relation to entropy. Quantum entanglement plays an important role in modern quantum information science and technology. However, the complexity of its structure makes understanding and managing it challenging. Regulus and Lamy's discovery shows that quantum entanglement follows an entropy rule similar to that for classical systems. This discovery opens new perspectives in the field of quantum information science and technology, deepening our understanding of quantum entanglement and its connection to thermodynamics. The results of the study indicate the possibility of reversibility of entanglement transformations, which could greatly simplify their use in various quantum technologies. Opening a new rule ... >>

Mini air conditioner Sony Reon Pocket 5 09.05.2024

Summer is a time for relaxation and travel, but often the heat can turn this time into an unbearable torment. Meet a new product from Sony - the Reon Pocket 5 mini-air conditioner, which promises to make summer more comfortable for its users. Sony has introduced a unique device - the Reon Pocket 5 mini-conditioner, which provides body cooling on hot days. With it, users can enjoy coolness anytime, anywhere by simply wearing it around their neck. This mini air conditioner is equipped with automatic adjustment of operating modes, as well as temperature and humidity sensors. Thanks to innovative technologies, Reon Pocket 5 adjusts its operation depending on the user's activity and environmental conditions. Users can easily adjust the temperature using a dedicated mobile app connected via Bluetooth. Additionally, specially designed T-shirts and shorts are available for convenience, to which a mini air conditioner can be attached. The device can oh ... >>

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

New method for creating powerful batteries 08.05.2024

With the development of technology and the expanding use of electronics, the issue of creating efficient and safe energy sources is becoming increasingly urgent. Researchers at the University of Queensland have unveiled a new approach to creating high-power zinc-based batteries that could change the landscape of the energy industry. One of the main problems with traditional water-based rechargeable batteries was their low voltage, which limited their use in modern devices. But thanks to a new method developed by scientists, this drawback has been successfully overcome. As part of their research, scientists turned to a special organic compound - catechol. It turned out to be an important component that can improve battery stability and increase its efficiency. This approach has led to a significant increase in the voltage of zinc-ion batteries, making them more competitive. According to scientists, such batteries have several advantages. They have b ... >>

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Random news from the Archive

Nanopores heat up as ions pass through them. 15.02.2022

Japanese scientists from the Institute of Scientific and Industrial Research (SANKEN) of Osaka University found that nanopores heat up when an ion stream passes through them. This phenomenon is explained by Ohm's law and can be useful in DNA sequencing, and it also presents prospects for the use of nanopores in biosensors.

Nanopores are small holes in a membrane. Their size is so small that only one of the DNA strands or a virus particle can pass through one pore. Now nanopores are being studied for use in sensors. Typically, an electrical voltage is applied to force a substance to pass through a nanopore. Then the ions contained in the solution can pass through the pore. However, it is known that electrical energy is converted into thermal energy through resistance. This is the Joule-Lenz law. This phenomenon has not been previously studied in nanopores.

Japanese researchers have studied how the application of electrical voltage affects the heating of a nanopore. They used a thermocouple (a temperature sensor that transmits a temperature-dependent electrical voltage) made of gold and platinum nanocrystals. Their contact point was only 100 nm. Using a thermocouple, the scientists measured the temperature near a 300-nm nanopore cut into a 40-nm thick film on a silicon wafer. The scientists passed a phosphate buffer solution through the nanopore and measured the ion current as a function of the applied voltage. It turned out that the heat that was released near the nanopore was proportional to the speed of the ion current. This is consistent with the classical Ohm's law.

The scientists found that as the size of the nanopore decreased, the thermal effect became more pronounced. This is due to the fact that less cooled liquid passes through the pore and it is not possible to balance the temperature. As a result, the release of heat cannot be neglected, since it raises the temperature by several degrees.

The researchers believe that this effect can be used in the future. For example, new sensors based on nanopores could not only detect viruses, but also inactivate them. In addition, due to the heating, the nanopores will not be clogged with polymers. Also, the thermal effect can help separate DNA chains during their sequencing.

See full Archive of science and technology news, new electronics

All languages of this page

Home page | Library | Articles | Website map | Site Reviews