The rise in cryptoasset valuations and the ease of creating new tokens have spurred an increase in illicit activities within the market. Decentralized exchanges (DEX) facilitate the trading of a vast array of tokens, including those with minimal liquidity, amplifying the risk of fraudulent schemes. Fraudulent practices take various forms, including counterfeit tokens, rug pulls, and pump-and-dump schemes, all lacking functional innovation and relying heavily on aggressive social media marketing. This study contributes to the identification and profiling of deceitful tokens on DEX platforms. Our approach involved compiling new tokens with an active trading start and attracted competition to buy them in the first blocks spanning multiple years from the Ethereum blockchain, tracking all associated purchase and sale transactions. Our analysis revealed that Uniswap V2 predominantly hosts the trading of new tokens, with an alarming discovery that over 98% of tokens minted daily exhibit fraudulent characteristics. Subsequently, a machine learning model was developed to predict the likelihood of a rug pull occurring shortly after trading commencement. Although the dataset labeling methodology and detection problem statement are exploratory, we demonstrate the economic significance of the proposed approach within a trading pipeline. The findings highlight the importance of identifying fraudulent activities and emphasize the need for collaboration between DEX and regulatory bodies to mitigate financial losses for investors.
Metals phytotoxicity assessment in soils is predominantly based on laboratory testing. In this paper, we evaluated the effect of the duration of laboratory testing on copper toxicity levels, in ryegrass (Lolium perenne L.) grown in soils polluted by copper mining. Laboratory testing was carried out according to the protocols of ISO 11269-2, 2012 (for 21 days) and ISO 22 030, 2005 (for 60 days). When tested for 21 days, the soil copper content had no statistically significant effect on plant growth or on the ryegrass shoot copper content. Conversely, when tested for 60 days, plant growth was inversely proportional to the total soil copper content and to the soil exchangeable copper concentration. Therefore, short-term testing underestimated copper phytotoxicity. The results of this study demonstrate that long-term laboratory testing is required to realistically predict metal toxicity in plants grown under the real conditions of natural and agricultural ecosystems.
A novel multiresonant fluorophore 2,5,10,13-tetraphenyldiindolo[3,2,1-de:3',2',1'-kl]phenazine was investigated computationally using (TD)DFT, synthesized and characterized; it emits blue light with a photoluminescence maximum at 436 nm and a quantum yield of 67
The study of molecular mechanisms of regeneration requires convenient models for in vitro and in vivo studies. In vitro cell cultures can fulfill such a function. However, their rapid aging and loss of initial specific properties in culture is a significant limitation of their use. Telomerase expression can help to overcome these limitations: it can prolong proliferative activity and stabilize the initial properties of a primary cell culture. Here, we created and studied the properties of human adipose tissue multipotent mesenchymal stromal cell (MSC) cultures that overexpress the catalytic protein subunit of human telomerase ( hTERT). We found that these MSC cultures were able to proliferate up to 38–63 PD, kept sensitivity to noradrenaline, serotonin, glutamate, γ-aminobutyric acid, parathyroid hormone, angiotensin II and histamine until at least 26 PD, retained MSC-specific immunophenotype until at least 36 PD, and preserved the ability to adipogenic, osteogenic and chondrogenic differentiation until at least 39 PD. Moreover, overexpression of hTERT in MSC cultures stabilized the qualitative and quantitative composition of their secretome at long-term passaging (at least up to 30 PD). The obtained results allow us to consider telomerase hyperexpression as a promising approach to obtaining MSC cultures with prolonged proliferative activity, which can be used as a stable and convenient object for fundamental and applied studies in the field of regenerative medicine.
Sulfur-enriched sodalite-group feldspathoids from the Lovozero alkaline complex (Kola Peninsula, Russia) and products of their laboratory, anthropogene, and natural thermal and radiation-induced transformations have been studied by electron-probe nicroanalysis, single-crystal X-ray diffractometry, Raman, infrared, and electron spin resonance spectroscopy, and ultra-violate, visible, and near-infrared absorption spectroscopy. Sodalite Na8[Al6Si6O24]Cl2 and sapozhnikovite Na8[Al6Si6O24](HS)2 form an almost continuous, isomorphous series in highly agpaitic feldspathoid syenites and their pegmatites with the Cl : HS ratio ranging from Cl100(HS)0 to Cl12(HS)88 (mol S_2^∙ - radical anion (500–600°C) and, then, the S_3^∙ - radical anion (700°C and higher). The S_3^∙ - groups also appear at the radiation-induced transformation of these minerals. Under the natural radioactive irradiation, at the contact with Th-enriched steenstrupine, an intermediate member of the sodalite–sapozhnikovite series transformed to the S_3^∙ - rich sodalite variety with the simplified formula Na8[Al6Si6O24][Cl,(S3)] earlier unknown in nature.
