The age of a person will be determined by blood. Free Technical Library News

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

The age of a person is determined by blood

02.07.2018

Geneticists from the United States have learned to determine the age of the killer or his victims from one drop of blood left at the scene of the crime, which will help police and detectives quickly find the perpetrators and victims.

Even in the relatively recent past, investigators and detectives could only determine the identity of a criminal based on his description from eyewitnesses or fingerprints. About two decades ago, their arsenal was expanded with the development of DNA sequencing technologies.

In recent years, chemists, biologists and physicists have joined this work, significantly expanding the arsenal of forensic scientists. Scraps of various molecules in blood samples of victims or killers, in their fingerprints and breath marks on glass, reveal their gender, bad habits, ethnicity and many other traits that can sharply narrow the circle of suspects.

Lednev and his colleague Kyle Doty learned to calculate one of the main characteristics of criminals and their victims - age - by analyzing the spectrum of protein molecules present in human blood.

As the scientists explain, as the body develops and ages, the chemical and protein composition of our blood undergoes significant changes. Biologists have known about this for a long time, but a large number of such changes and a complex system of relationships between them prevented us from using this pattern to calculate biological and calendar age.

Doty and Lednev solved this problem by sidestepping it - they didn't reveal these connections, but simply studied which molecules are most often found in the blood of children, adolescents, adults and the elderly, using the so-called Raman spectroscope.

It allows you to accurately measure the number of molecules of different masses and find out their approximate shape by firing at the sample with a laser. Beams of light particles will collide with molecules, be absorbed by them and generate flashes of secondary radiation, the "color", twist and other properties of which will depend on the shape and structure of the substance.

By analyzing the resulting "rainbow", scientists can quickly track differences in the chemical composition of samples of blood or other bodily fluids, and determine the approximate age of their owner from them.

<< Back: A crystal has been created that refracts light better than all substances 02.07.2018

>> Forward: Mars and its volcanic past 01.07.2018

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Electronic helmet for truck drivers 14.04.2024

Road safety, especially for drivers of heavy construction equipment, is a top priority for engineers and scientists. In light of this, the German Fraunhofer Institute for Structural Strength and System Reliability has introduced a new product - an electronic helmet, which is designed to protect drivers from serious injury when driving construction vehicles. A new electronic helmet developed by a team of engineers from the Fraunhofer Institute opens up new perspectives for the safety of truck and construction equipment drivers. The device is capable of monitoring the level of shaking in the car cabin and warning the driver of possible danger. The basis of the helmet's operation is a built-in piezoelectric sensor, which generates electricity during physical deformation. This mechanism allows the device to respond to intense vibrations typical of construction equipment. When the level of deformation exceeds safe values, an alarm system is activated on the helmet, ... >>

Antivitamins instead of antibiotics 13.04.2024

The problem of bacterial resistance to antibiotics is becoming increasingly serious, posing a threat to the effective treatment of infections. In light of this, researchers are looking for new ways to combat superbugs. One of the promising directions is the use of antivitamins that can have an antibacterial effect. Antivitamins, although known as the opposite of vitamins, have proven to be a promising tool in the fight against bacterial antibiotic resistance. A study conducted by scientists from the University of Göttingen in Germany confirmed their potential in creating new drugs to combat dangerous infections. With the rise of antibiotic-resistant superbugs, there is a need to find alternative treatments. Antivitamins are molecules similar to vitamins, but capable of inhibiting bacterial activity without harm to the human body. At the moment, science knows only three antivitamins: rose ... >>

Random news from the Archive

Hybari hydrogen train 10.03.2022

Japanese developers have created an innovative electric train powered by hydrogen fuel cells.

The new train was introduced by the East Japan Railway. The train is equipped with a fuel cell and battery system and will begin testing in March.

The hydrogen train is called Hybari, which is an abbreviation for Hydrogen-Hybrid Advanced Rail Vehicle for Innovation and translates as - Hydrogen-Hybrid Advanced Rail Vehicle for Innovation.

A two-car Hybari costs close to $35 million. and can travel up to 140 km with a maximum speed of 100 km / h on a single hydrogen gas station.

In March, it is planned to carry out a test run of a hydrogen train on the Nanbu line.

See full Archive of science and technology news, new electronics

All languages of this page

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