Related Research Articles
Indium phosphide (InP) is a binary semiconductor composed of indium and phosphorus. It has a face-centered cubic ("zincblende") crystal structure, identical to that of GaAs and most of the III-V semiconductors.
Nanosensors are nanoscale devices that measure physical quantities and convert these to signals that can be detected and analyzed. There are several ways proposed today to make nanosensors; these include top-down lithography, bottom-up assembly, and molecular self-assembly. There are different types of nanosensors in the market and in development for various applications, most notably in defense, environmental, and healthcare industries. These sensors share the same basic workflow: a selective binding of an analyte, signal generation from the interaction of the nanosensor with the bio-element, and processing of the signal into useful metrics.
Clandestine chemistry is chemistry carried out in secret, and particularly in illegal drug laboratories. Larger labs are usually run by gangs or organized crime intending to produce for distribution on the black market. Smaller labs can be run by individual chemists working clandestinely in order to synthesize smaller amounts of controlled substances or simply out of a hobbyist interest in chemistry, often because of the difficulty in ascertaining the purity of other, illegally synthesized drugs obtained on the black market. The term clandestine lab is generally used in any situation involving the production of illicit compounds, regardless of whether the facilities being used qualify as a true laboratory.
2,4-Dinitrophenol (2,4-DNP or simply DNP) is an organic compound with the formula HOC6H3(NO2)2. It has been used in explosives manufacturing and as a pesticide and herbicide.
A designer drug is a structural or functional analog of a controlled substance that has been designed to mimic the pharmacological effects of the original drug, while avoiding classification as illegal and/or detection in standard drug tests. Designer drugs include psychoactive substances that have been designated by the European Union as new psychoactive substances (NPS) as well as analogs of performance-enhancing drugs such as designer steroids. Some of these were originally synthesized by academic or industrial researchers in an effort to discover more potent derivatives with fewer side effects and shorter duration and were later co-opted for recreational use. Other designer drugs were prepared for the first time in clandestine laboratories. Because the efficacy and safety of these substances have not been thoroughly evaluated in animal and human trials, the use of some of these drugs may result in unexpected side effects.
Photoacoustic spectroscopy is the measurement of the effect of absorbed electromagnetic energy on matter by means of acoustic detection. The discovery of the photoacoustic effect dates to 1880 when Alexander Graham Bell showed that thin discs emitted sound when exposed to a beam of sunlight that was rapidly interrupted with a rotating slotted disk. The absorbed energy from the light causes local heating, generating a thermal expansion which creates a pressure wave or sound. Later Bell showed that materials exposed to the non-visible portions of the solar spectrum can also produce sounds.
The United States Drug Enforcement Administration (DEA) maintains lists regarding the classification of illicit drugs. It also maintains List I of chemicals and List II of chemicals, which contain chemicals that are used to manufacture the controlled substances/illicit drugs. The list is designated within the Controlled Substances Act but can be modified by the U.S. Attorney General as illegal manufacturing practices change.
Forensic chemistry is the application of chemistry and its subfield, forensic toxicology, in a legal setting. A forensic chemist can assist in the identification of unknown materials found at a crime scene. Specialists in this field have a wide array of methods and instruments to help identify unknown substances. These include high-performance liquid chromatography, gas chromatography-mass spectrometry, atomic absorption spectroscopy, Fourier transform infrared spectroscopy, and thin layer chromatography. The range of different methods is important due to the destructive nature of some instruments and the number of possible unknown substances that can be found at a scene. Forensic chemists prefer using nondestructive methods first, to preserve evidence and to determine which destructive methods will produce the best results.
Gunshot residue (GSR), also known as cartridge discharge residue (CDR), gunfire residue (GFR), or firearm discharge residue (FDR), consists of all of the particles that are expelled from the muzzle of a gun following the discharge of a bullet. It is principally composed of burnt and unburnt particles from the explosive primer, the propellant (gunpowder), and vaporized lead. The act of firing a bullet incites a very violent explosive reaction that is contained within the barrel of the gun, which can cause the bullet, the barrel, or the cartridge to become chipped. Meaning gunshot residue may also included metal fragments from the cartridge casing, the bullets jacket, as well as any other dirt or residue contained within the barrel that could have become dislodged.
Surface-enhanced Raman spectroscopy or surface-enhanced Raman scattering (SERS) is a surface-sensitive technique that enhances Raman scattering by molecules adsorbed on rough metal surfaces or by nanostructures such as plasmonic-magnetic silica nanotubes. The enhancement factor can be as much as 1010 to 1011, which means the technique may detect single molecules.
Hyperspectral imaging collects and processes information from across the electromagnetic spectrum. The goal of hyperspectral imaging is to obtain the spectrum for each pixel in the image of a scene, with the purpose of finding objects, identifying materials, or detecting processes. There are three general types of spectral imagers. There are push broom scanners and the related whisk broom scanners, which read images over time, band sequential scanners, which acquire images of an area at different wavelengths, and snapshot hyperspectral imagers, which uses a staring array to generate an image in an instant.
An electronic nose is an electronic sensing device intended to detect odors or flavors. The expression "electronic sensing" refers to the capability of reproducing human senses using sensor arrays and pattern recognition systems.
Terahertz tomography is a class of tomography where sectional imaging is done by terahertz radiation. Terahertz radiation is electromagnetic radiation with a frequency between 0.1 and 10 THz; it falls between radio waves and light waves on the spectrum; it encompasses portions of the millimeter waves and infrared wavelengths. Because of its high frequency and short wavelength, terahertz wave has a high signal-to-noise ratio in the time domain spectrum. Tomography using terahertz radiation can image samples that are opaque in the visible and near-infrared regions of the spectrum. Terahertz wave three-dimensional (3D) imaging technology has developed rapidly since its first successful application in 1997, and a series of new 3D imaging technologies have been proposed successively.
The Fido explosives detector is a battery-powered, handheld sensory device that uses amplifying fluorescent polymer (AFP) materials to detect trace levels of high explosives like trinitrotoluene (TNT). It was developed by Nomadics, a subsidiary of ICX Technologies, in the early 2000s as part of the Defense Advanced Research Projects Agency's (DARPA) Dog's Nose program. The Fido explosives detector is considered the first artificial nose capable of detecting landmines in the real world. The device was named after its ability to detect explosive vapors at concentrations of parts per quadrillion, which is comparable to the sensitivity of a bomb-sniffing dog’s nose, i.e. the historical “gold standard” for finding concealed explosives.
Tuan Vo-Dinh is R. Eugene and Susie E. Goodson Professor of Biomedical Engineering at the Duke University Pratt School of Engineering and professor of Chemistry and director of the Fitzpatrick Institute for Photonics at Duke.
Amateur chemistry or home chemistry is the pursuit of chemistry as a private hobby. Amateur chemistry is usually done with whatever chemicals are available at disposal at the privacy of one's home. It should not be confused with clandestine chemistry, which involves the illicit production of controlled drugs. Notable amateur chemists include Oliver Sacks and Sir Edward Elgar.
N-isopropylbenzylamine is a compound that has appeared in chemical literature often playing an intermediary role in applications of experimental synthesis and novel organic transformations. Despite having limited documented uses, it is most well known for having previously come to the attention of the DEA due to being used by illicit methamphetamine manufacturers as a diluent of or substitute for methamphetamine, with many recorded sightings occurring in the years 2007-2008. As of 2018, researchers from the DEA associated with the Methamphetamine Profiling Program, which categorizes route-specific and other impurities in seized drug samples, has stated that isopropylbenzylamine appears only "occasionally". This compound is a chain isomer of methamphetamine that exhibits the same chemical formula and molar mass giving their hydrochloride salts similar physical properties, such as relatively close melting points and comparable appearance. Consequently, it can be used as a substitute or diluent of methamphetamine without this being obvious to users, though the differing melting points and various attributes of its presentation such as softer or more easily broken crystals have been noted as a possible indication of its presence. In Australia it is known to be a border controlled substance. It currently is unknown to be a controlled substance in any other jurisdiction. Isopropylbenzylamine is not thought to have any stimulant effects in its own right, though anecdotal reports suggest that it may be associated with side effects such as headaches and confusion which are not typically associated with methamphetamine itself. The toxicity of N-isopropylbenzylamine has been studied as of 2022 and it has been found to produces toxicity via increasing nitric oxide in vitro. In this study, in vitro toxicity of N-isopropylbenzylamine and its toxicity-related targets were investigated in SN4741, SH-SY5Y or PC12 cell lines that model neurons. The study sounds an alarm for methamphetamine abusers and warns of the dangerousness of N-isopropylbenzylamine for public health. Other "cutting agents" found to have been used for methamphetamine include the related compounds methylbenzylamine and ethylbenzylamine, as well as dimethylsulfone.
United Nations Security Council Resolution 1817 was unanimously adopted on 11 June 2008.
Drug checking or pill testing is a way to reduce the harm from drug consumption by allowing users to find out the content and purity of substances that they intend to consume. This enables users to make safer choices: to avoid more dangerous substances, to use smaller quantities, and to avoid dangerous combinations.
N-t-BOC-MDMA is a chemical compound which can be both a synthetic precursor to, or a prodrug of the empathogenic drug MDMA. It was first identified in Australia in 2015 as a seizure by customs, and has subsequently been found in China, the Netherlands and other European countries. Originally it was thought to be intended as a non-illegal form of MDMA which could be easily converted into the prohibited final product after importation, however one seizure by police found N-t-BOC-MDMA in the process of being pressed into pills, and experiments with simulated gastric fluid confirmed that it can be broken down to MDMA by human stomach acid. Similar N-protected compounds such as N-t-BOC-methamphetamine, N-p-tosyl-methamphetamine, N-t-BOC-ketamine, N-t-BOC-norketamine and N-methoxycarbonyl-MDA have also been encountered by law enforcement.
References
- ↑ "Regulation (EU) No 98/2013 of the European Parliament and of the Council of 15 January 2013 on the marketing and use of explosives precursors Text with EEA relevance". Archived from the original on 2017-09-13. Retrieved 2017-09-13.
- ↑ S. Mengali; D. Luciani; R. Viola; N. Liberatore; S. Zampolli; I. Elmi; G. Cardinali; A. Poggi; E. Dalcanale; E. Biavardi; P. Esseiva; O. Delemont; F. Bonadio; F.S. Romolo (30 January 2013). "Toward street detection of amphetamines". SPIE Newsroom. Archived (PDF) from the original on 2017-08-19.
- ↑ Trace detection of explosives and their precursors by surface enhanced Raman spectroscopy. S. Almaviva, S. Botti, L. Cantarini, A. Palucci, A. Puiu, A. Rufoloni, L. Landstrom, F.S. Romolo. Proceedings of SPIE - The International Society for Optical Engineering, Article number 854602, Optics and Photonics for Counterterrorism, Crime Fighting, and Defence VIII; Edinburgh; United Kingdom (2012) Code 96354.
- ↑ Desmet, Cloé; Degiuli, Agnes; Ferrari, Carlotta; Romolo, Francesco; Blum, Loïc; Marquette, Christophe (2017). "Electrochemical Sensor for Explosives Precursors' Detection in Water". Challenges. 8: 10. doi: 10.3390/challe8010010 .
- ↑ Ferrari, Carlotta; Ulrici, Alessandro; Romolo, Francesco (2017). "Expert System for Bomb Factory Detection by Networks of Advance Sensors". Challenges. 8: 1. doi: 10.3390/challe8010001 .
- ↑ Romolo, Francesco Saverio; Connell, Samantha; Ferrari, Carlotta; Suarez, Guillaume; Sauvain, Jean-Jacques; Hopf, Nancy B. (2016). "Locating bomb factories by detecting hydrogen peroxide" (PDF). Talanta. 160: 15–20. doi:10.1016/j.talanta.2016.06.033. PMID 27591582.
 | This biochemistry article is a stub. You can help Wikipedia by expanding it. |
 | This chemical reaction article is a stub. You can help Wikipedia by expanding it. |