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Hyphenated Techniques in Liquid Chromatography and their Applications in Forensic Toxicology:A Review

journal of Forensic Science and Medicine 2021年第4期7卷 123-136页

作者： Sachil Kumar maciej j.bogusz Department of Forensic SciencesNaif Arab University for Security Sciences College of Criminal justice Naif Arab University for Security Sciences Royal Clinics King Faisal Specialist Hospital and Research Centre Royal Toxicological LaboratoryRiyadhSaudi Arabiainstitute of Forensic MedicineAachen University of TechnologyAachenGermany

Conventional analytical methods,such as gas chromatography,high performance liquid chromatography(LC),ultra-violet,and others,are ineffective in addressing the increasing number of problems in forensic *** analytical methods,wherein the separation method are coupled or combined with spectral methods,with the help of a proper interface,are the available alternative *** key benefits of these methods are the requisites of low limits for detection,shorter analytical time,the possibility of automation,better reproducibility,and high precision and *** review discusses on some of the hyphenated analytical methods that involve LC as the separation tool,for their most recent applications in the area of forensic toxicology focusing on the screening of drugs of abuse,the usage of alternative matrices for monitoring drug abuse,analysis of chemical warfare agents,determination of doping agents and related substances,natural toxins,environmental poisons,and examination of food produce *** incorporation of the more user-friendly LC-interfaces,such as atmospheric pressure chemical ionization,and electrospray ionization in the LC-mass spectrometry has increased the popularity of this technique tremendously among scientists of different *** approaches have extremely low constraints regarding the identification and quantification,and offer high reproducibility,with unparalleled potential.

关键词： Chemical warfare agents chromatography drug abuse forensic toxicology hazardous substances high-pressure liquid mass spectrometry

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Statistical variation of characteristics of random packed beds of Raschig rings:The influence of the sample size

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Particuology 2021年第3期19卷 50-61页

作者： PawełNiegodajew maciej Marek Czestochowa University of Technology Department of Thermal Machineryal.Armii Krajowej 2142-200 CzestochowaPoland

Many studies on random packed beds have been dedicated to local porosity(void fraction)or orientation distribution of ***,despite the random nature of the considered packings,very little attention has been devoted to examination whether the number of particles used in experiments/simulations is sufficiently large to get reproducible *** reproducibility of the key packing parameters depends on the size of the population of particles(sample size)and ordering effects induced by the confining *** work investigates quantitatively the influence of the sample size on the statistical variation of the packed bed *** beds of Raschig rings were generated with a sequential algorithm and three column diameters were *** has been found that in the case of the orientation distribution the results depend strongly on the sample size,especially for slender columns,while the porosity profiles are well-reproducible characteristics even for relatively small packings of *** complementary results for full cylinders are also included.

关键词： Random packing Raschig rings Full cylinders Particle orientation Porosity Reproducibility

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Possibilities of Increase of Adhesion of the Cubic Boron Nitride Coatings by Applying an Interfacial Layers

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材料热处理学报 2004年第05B期25卷 1191-1194页

作者： maciej Kupczyk Poznan University of Technology Institute of Mechanical Engineering Poznan Poland

In the work the chosen investigations of the adhesion force of thin, superhard coatings to the cutting edges made of cemented carbides are presented. For identification of the adhesion force of coatings to substrate an automatic scratch tester constructed at Poznan University of Technology was applied. The estimation of the adhesion force (value of critical load measured during scratch test) was carried out on the base of the vibration signal. Results of investigations are pointed at the influence of a surface preparation (degreasing, etching, low and high-temperature sputtering) on a critical load values. It was found that the most effective method for surface preparation is low temperature sputtering. The influence of the TiC+Al2O3+TiN interfacial layer on increase of the adhesion force of BN coating to cemented carbides substrate was observed.

关键词：氮化硼界面间层耐磨性脆性

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Influence of the Discharge Voltage during Pulse-Plasma Process on the Durability of Edges coated with Superhard Coatings

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材料热处理学报 2004年第05B期25卷 883-887页

作者： maciej Kupczyk Poznan University of Technology Institute of Mechanical Engineering Poznan Poland

In the paper the experimental results concerning the functional quality of thin, superhard coatings produced on cutting edges is described. Boron nitride coatings were deposited on insert cutting edges made cemented carbides by the pulse-plasma method. The comparative investigations of mentioned coatings have been concerned of tool life of edges during steel machining. In these investigations for the purpose of additional increase of coated edge durability an interfacial layers were applied. Presented investigations particularly pointed out to essential influence of the values of discharge voltage on the coating structure and durability of edges coated with boron nitride.

关键词： PVD 耐磨覆层使用寿命放电电压边缘涂层超硬涂层

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Creating Local Reinforcement of a Channel in a Composite Casting Using Electromagnetic Separation

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journal of Materials Science & Technology 2015年第9期31卷 918-922页

作者： Slawomir Golak maciej Dyzia Faculty of Materials Engineering and Metallurgy Silesian University of Technology

This article presents a new method to obtain local reinforcement in near-surface layers of channels in castings made of a particle-reinforced metal matrix composite in the alternating electromagnetic field generated by an inductor placed inside the channel. In centrifugal casting, the centrifugal force on the particles leads to the formation of composite structures, while in the proposed method, the electromag- netic force field on the particles results in the designed structure of the composite casting. The article reports the experimental verification of this method using an aluminium sleeve reinforced locally with SiC particles at the inner wall.

关键词： Metal matrix compositesFunctionally graded materialsElectromagnetic separation

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Spatiotemporal analysis of elastic and inelastic deformations in roof-rocks from seismological observations

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International journal of Mining Science and Technology 2021年第2期31卷 241-251页

作者： maciej jMendecki RafałPakosz Łukasz Wojtecki Wacław MZuberek Faculty of Environmental Sciences the University of Silesia in Katowice41-200 SosnowiecPoland Polish Mining Group 40-039 KatowicePoland Central Mining Institute 40-166 KatowicePoland

The spatiotemporal analysis of seismic zones characterised by the scattering and accumulation of strain energy in the roof-rocks of the excavated longwall panel where inelastic or elastic deformations occurred during hard coal seam mining is *** studied longwall panel was designed to utilize the effect of partial stress relaxation caused by the earlier extraction of the coal seams located above.A full seismic moment tensor and spectral source parameter analyses were used to obtain information about the degree of inelastic and elastic coseismic *** study also showed that these deformation changes correspond to variation in the Benioff strain release ***,analyses of deformation zones were compared with the relationship between radiated energy and the excavated volume of rocks per *** concept of balanced seismic energy release assumed the exponential increase of released seismic energy with the increase in the volume of excavated *** between the observed and predicted radiated energies indicated that strain energy in selected zones in the rock mass was either scattered if the prediction was overestimated,or accumulated if ***,the study showed that elastic deformation in one zone can lead to inelastic deformation in the same zone.

关键词： Mining seismicity Seismic source volume Apparent volume Hard coal mine Longwall mining Benioff strain

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Characterization of multiphase gas–solid flow and accuracy of turbulence models for lower stage cyclones used in suspension preheaters

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Chinese journal of Chemical Engineering 2019年第7期27卷 1618-1629页

作者： Marek Wasilewski Stanislaw Anweiler maciej Masiukiewicz Faculty of Production Engineering and Logistics Opole University of Technology76 Proszkowska St.45-758 OpolePoland Faculty of Mechanical Engineering Opole University of Technology76 Proszkowska St.45-758 OpolePoland

This study involved the analysis and characterization of the multiphase flow phenomenon inside the lower stage cyclone separator used in the clinker burning *** analysis was performed using both CFD and experimental research *** few studies are devoted to such types of cyclone separators,which in addition to their basic functions are also responsible for the technological *** to the atypical working conditions of these cyclone separators,they are characterized with a complex geometry,which significantly differs from that of the traditional ***,the evaluation of the accuracy and level of reliability of the two models of turbulence closure—k-e RNG and RSM(RANS),and the *** results obtained led to the conclusion that for the lower stage cyclone separators,the LES model proved to be the most accurate(both in the case of forecasting the separation efficiency and pressure drop).The performance parameter(in particular the separation efficiency)values obtained for the RSM model were also characterized by high *** k-e RNG model was characterized by significantly larger deviations.

关键词： Cyclone separators Separation Multiphase flow CFD Pressure drop Clinker burning

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Apples to oranges:environmentally derived,dynamic regulation of serotonin neuron subpopulations in adulthood?

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Neural Regeneration Research 2025年第9期20卷 2596-2597页

作者： Christopher j.O’Connell Matthew j.Robson Department of Genetics College of MedicineHarvard UniversityBostonMAUSA james L.Winkle College of Pharmacy Division of Pharmaceutical SciencesUniversity of CincinnatiCincinnatiOHUSA Neuroscience Graduate Program College of MedicineUniversity of CincinnatiCincinnatiOHUSA

Traumatic brain injury(TBI)is a public health problem with an undue economic burden that impacts nearly every age,ethnic,and gender group across the globe(Capizzi et al.,2020).TBIs are often sustained during a dynamic range of exposures to energetic environmental forces and as such outcomes are typically heterogeneous regarding severity and pathology(Capizzi et al.,2020).

关键词： sustained orange dynamic

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Composite neuroendocrine and adenomatous carcinoma of the papilla of Vater

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World journal of Gastroenterology 2009年第33期15卷 4199-4200页

作者： joanna A Musialik maciej j Kohut Tomasz Marek Anatol Wodo■azski Marek Hartleb Department of Gastroenterology and Hepatology Medical University of Silesia Department of Basic Biomedical Sciences Medical University of Silesia Department of Pathomorphology Medical University of Silesia

Malignant tumors of papilla are usually adenocarcinomas. We present a 67-year-old female who became icteric as result of a malignant tumor infiltrating the papilla of Vater. Histopathological assessment of surgically excised tumor showed both neuroendocrine and adenocarcinomatous features. To our knowledge, this is the seventh report of this rare neoplastic association in the duodenal periampullary region.

关键词： Adenocarcinoid Composite carcinoma Carcinoma of Vater papilla Carcinoid Gastropancreatic neuroendocrine tumor

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Temporal dynamics of neonatal hypoxic-ischemic encephalopathy injuries on magnetic resonance imaging

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Neural Regeneration Research 2025年第11期20卷 3144-3150页

作者： Holly Flyger Samantha j.Holdsworth Alistair j.Gunn Laura Bennet Hamid Abbasi Mātai Medical Research Institute Tairāwhiti GisborneNew Zealand Department of Anatomy&Medical Imaging Faculty of Medical and Health SciencesThe University of AucklandAucklandNew Zealand Center for Brain Research The University of AucklandAucklandNew Zealand Auckland Bioengineering Institute The University of AucklandAucklandNew Zealand

Moderate to severe perinatal hypoxic-ischemic encephalopathy occurs in~1 to 3/1000 live births in high-income countries and is associated with a significant risk of death or neurodevelopmental *** assessment is important to help identify highrisk infants,to help families,and to support appropriate interventions.A wide range of monitoring tools is available to assess changes over time,including urine and blood biomarkers,neurological examination,and *** present,magnetic resonance imaging is unique as although it is expensive and not suited to monitoring the early evolution of hypoxic-ischemic encephalopathy by a week of life it can provide direct insight into the anatomical changes in the brain after hypoxic-ischemic encephalopathy and so offers strong prognostic information on the long-term outcome after hypoxic-ischemic *** review investigated the temporal dynamics of neonatal hypoxic-ischemic encephalopathy injuries,with a particular emphasis on exploring the correlation between the prognostic implications of magnetic resonance imaging scans in the first week of life and their relationship to long-term outcome prediction,particularly for infants treated with therapeutic hypothermia.A comprehensive literature search,from 2016 to 2024,identified 20 pertinent *** review highlights that while the optimal timing of magnetic resonance imaging scans is not clear,overall,it suggests that magnetic resonance imaging within the first week of life provides strong prognostic *** challenges limit the timing consistency,particularly the need for intensive care and clinical ***,although most reports examined the prognostic value of scans taken between 4 and 10 days after birth,there is evidence from small numbers of cases that,at times,brain injury may continue to evolve for weeks after *** suggests that in the future it will be important to explore a wider range of times after hypo

关键词： magnetic resonance imaging neonatal hypoxic-ischemic encephalopathy neurodevelopmental outcomes prognostic biomarkers in neuroimaging scan timing therapeutic hypothermia

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