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Multiresidue pesticide analysis in tomato using gc-MS/MS using modified QuEchERS method with titanium-coated graphite with cNt-ABS nanocomposite as dispersive solid-phase extraction materials

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Food Quality and Safety 2022年第4期6卷 608-618页

作者： Mahadev c.Khetagoudar g.t.Deepa P.t.goroji Mahadev B.chetti Avvaru Praveen Kumar Dinesh c.Bilehal University of Agricultural Sciences DharwadKarnatakaIndia Department of Applied chemistry School of Applied Natural ScienceAdama Science and Technology UniversityAdamaEthiopia Department of chemistry Karnatak UniversityDharwadKarnatakaIndia

the presence of pesticide residues in food and vegetables is a growing.concern for *** monitor these residues reliably,a selective and sensitive multiresidue system has been developed and validated in tomato by gas chromatography–tandem mass spectrometry(gc-MS/MS).titanium-coated graphite with carbon nanotube(cNt)in acrylonitrile–butadiene–styrene(ABS)used as reversed-dispersive solid-phase extraction materials with modified QuEchERS(Quick,Easy,cheap,Effective,Rugged,and Safe)***-coated graphite with cNt-ABS is synthesized,characterized by X-ray diffraction and scanning electron *** clean-up performance of titanium-coated graphite with cNt-ABS was demonstrated to be better to primary secondary amine and graphitized carbon black *** processing of two multiple reaction monitoring transformations for each analyte is done using gc-MS/MS in electron impact *** purification and recovery effects(74%–100%)of 35 pesticides were achieved in tomato matrices when using 5 mg of titanium-coated graphite ABS-cNt *** was observed that quinolphos and deltamethrin are present above the maximum residue *** technique proved to be reliable and sensitive in tomato samples for the routine testing of 35 pesticides.

关键词： gas chromatography-tandem mass spectrometry pesticide residue analysis multiple reaction monitoring QuEchERS titanium-coated graphite with cNt-ABS nanocomposite

Influence of earthquake direction on the seismic response of irregular plan Rc frame buildings

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Earthquake Engineering and Engineering Vibration 2014年第2期13卷 243-256页

作者： Magliulo g Maddaloni g Petrone c University of Naples Federico II Department of Structures for Engineering and Architecture University of Naples Parthenope Department of Engineering

the nonlinear response of structures is usually evaluated by considering two accelerograms acting simultaneously along the orthogonal directions. In this study, the infl uence of the earthquake direction on the seismic response of building structures is examined. three multi-story Rc buildings, representing a very common structural typology in Italy, are used as case studies for the evaluation. they are, respectively, a rectangular plan shape, an L plan shape and a rectangular plan shape with courtyard buildings. Nonlinear static and dynamic analyses are performed by considering different seismic levels, characterized by peak ground acceleration on stiff soil equal to 0.35 g, 0.25 g and 0.15 g. Nonlinear dynamic analyses are carried out by considering twelve different earthquake directions, and rotating the direction of both the orthogonal components by 30° for each analysis(from 0° to 330°). the survey is carried out on the L plan shape structure. the results show that the angle of the seismic input motion signifi cantly infl uences the response of Rc structures; the critical seismic angle, i.e., the incidence angle that produces the maximum demand, provides an increase of up to 37% in terms of both roof displacements and plastic hinge rotations.

关键词： plan irregularity nonlinear analyses reinforced concrete buildings seismic performance ground motion directionality

the Analysis of Main Dosimetric glow Peaks in caF_(2):tm (tLD-300)

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chinese Physics Letters 2013年第5期30卷 155-159页

作者： Vural E.Kafadar Metin Bedir A.Necmeddin Yazıcı tülin günal Department of Engineering Physics University of GaziantepGaziantep 27310Turkey

the thermoluminescence properties of caF_(2):tm (tLD-300) are examined in detail after β-irradiation at room temperature. the glow curve of the sample shows two main dosimetric glow peaks: P3 (at ~150℃) and P5 (at ~250℃). the additive dose, variable heating rate, computer glow curve deconvolution, peak shape and three points methods are used to evaluate the trapping parameters, namely the order of kinetics (b), activation energy (E) and frequency factor (s) associated with the dosimetric thermoluminescent glow peaks (P3 and P5) of caF_(2):tm (tLD-300) after different dose levels with β-irradiation.

关键词： temperature tLD kinetics

the impact of alpha-fetoprotein (AFP), child-turcotte-pugh (ctP) score and disease staging on the survival of hepatocellular carcinoma (Hcc) patients: a retrospective cohort from single oncology center

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Oncology research 2025年第1期33卷 149-160页

作者： Nasser Mulla Yousef Katib Asim M Almughamsi Duaa S Alkhayat Mohamed Mosaad Samir t Alfotih Rawan Alaofi Department of Internal Medicine Faculty of Medicine Taibah University Madinah 42278 Saudi Arabia. Department of Radiology Faculty of Medicine Taibah University Madinah 42278 Saudi Arabia. Department of Surgery Faculty of Medicine Taibah University Madinah 42278 Saudi Arabia. Department of Endemic and Infectious Diseases Suez Canal University Ismailia 41522 Egypt. King Salman bin Abdulaziz Medical city Madinah 42311 Saudi Arabia. Prince Mohammed Bin Abdulaziz Hospital Madinah 41511 Saudi Arabia.

Background:Hepatocellular carcinoma (Hcc) is the most common cause of cancer-related death in Saudi Arabia. Our study aimed to investigate the patterns of Hcc and the effect of tNM staging, Alfa-fetoprotein (AFP), and child-turcotte Pugh (ctP) on patients' overall survival (OS).Methods:A retrospective analysis was conducted on 43 Hcc patients at a single oncology center in Saudi Arabia from 2015 to 2020. All patients had to fulfill one of the following.criteria: (a) a liver lesion reported as definitive Hcc on dynamic imaging and/or (b) a biopsy-confirmed diagnosis.Results:the mean patient age of all Hcc cases was 66.8 with a male-to-female ratio of 3.3:1. All patients were stratified into two groups: viral Hcc (n = 22, 51%) and non-viral Hcc (n = 21, 49%). Among viral-Hcc patients, 55% were due to HBV and 45% due to HcV. cirrhosis was diagnosed in 79% of cases. Age and sex did not significantly statistically differ in OS among viral and non-viral Hcc patients (-value > 0.05). About 65% of patients had tumor size >5 cm during the diagnosis, with a significant statistical difference in OS (-value = 0.027). AFP was >400 ng/ml in 45% of the patients. there was a statistically significant difference in the OS in terms of AFP levels (-value = 0.021). A statistically significant difference was also observed between the ctP score and OS (-value = 0.02). ctP class B had the longest survival. BSc was the most common treatment provided to Hcc patients followed by sorafenib therapy. there was a significant statistical difference in OS among viral and non-viral Hcc patients (-value = 0.008).conclusions:the most common predictors for OS were the underlying.cause of Hcc, AFP, and tumor size. Being having non-viral etiology, a tumor size >5 cm, an AFP > 400 ng/mL, and a ctP score class c were all negatively associated with OS.

关键词： Alpha-fetoprotein (AFP) child-turcotte-pugh Hepatocellular carcinoma Pattern Progression free survival

Performance Analysis of Intelligent Robust Facility Layout Design

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chinese Journal of Mechanical Engineering 2017年第2期30卷 407-418页

作者： g MOSLEMIPOUR t S LEE Y t LOONg Department of Industrial Engineering Payame Noor University Faculty of Engineering and technology Multimedia University

Design of a robust production facility layout with minimum handling.cost （MHc） presents an appropriate approach to tackle facility layout problems in a dynamic volatile environment, in which product demands randomly change in each planning period. the objective of the design is to find the robust facility layout with minimum total material handling.cost over the entire multiperiod planning horizon. this paper proposes a new mathematical model for designing robust machine layout in the stochastic dynamic environment of manufacturing systems using quadratic assignment problem （QAP） formulation. In this investigation, product demands are assumed to be normally distributed random variables with known expected value, variance, and covariance that randomly change from period to period. the proposed model was verified and validated using randomly generated numerical data and benchmark examples. the effect of dependent product demands and varying interest rate on the total cost function of the proposed model has also been investigated. Sensitivity analysis on the proposed model has been performed. Dynamic programming and simulated annealing optimization algorithms were used in solving the modeled example problems.

关键词： Robust layout Dynamic stochastic environment Manufacturing system Dynamic programming

Numerical Analysis of Deteriorated Sub-sea Pipelines under Environmental Loads

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chinese Journal of Mechanical Engineering 2015年第6期28卷 1163-1170页

作者： g.cüYEN Engin Department of civil Engineering Faculty of Engineering Celal Bayar University

the significant point is the bidirectional interaction technique in FSI analysis while investigating subsea corrosion effect. By this way, pipe environment is accurately modelled and fluid effects are also considered. the effect of external corrosion defects on structural behaviour of a pipeline is studied by creating a nonlinear numerical model based on the finite element method according to ABAQUS analysis program. corrosion losses of sections are obtained from experimental results and applied to the model. Numerical model is formed by a span of sub-sea pipeline that is subjected to environmental loads. Seismic and wind-generated irregular wave loads are considered as environmental loads. Irregular wave is represented with equivalent eight regular waves via FFt. the pipe is modelled according to two different types which are non-corroded（intact） and corroded（deteriorated） to demonstrate corrosion effects on it. the visible type of corrosion in marine environment is named ‘pitting＇ corrosion, in which the material loss is locally interpenetrated over the surface. By considering this situation, the corroded and non-corroded pipes are modelled as 3D solid elements. the main point is revealing how the subsea corrosion affects the structural behaviour of pipelines on the basis of implementation of experimental results to a model structure due to changes of stresses and displacement.

关键词： offshore pipelines environmental loads corrosion numerical analysis

Numerical Study on Sinusoidal Fluctuated Pulsatile Laminar Flow through Various constrictions

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communications in computational Physics 2007年第1期2卷 99-122页

作者： t.S.Lee X.Liu g.c.Li H.t.Low Department of Mechanical Engineering National University of SingaporeSingapore 119260.

Numerical simulations have been carried out for laminar sinusoidal pulsating flow in a tube with smooth single constriction.A second-order finite volume method has been developed to solve the fluid flow governing equations on a nonstaggered non-orthogonal *** effects of the Reynolds number,the Womersley number,the pulsatile amplitude,the constriction ratio and the constriction length on fluid flow in constricted tube will be *** will be demonstrated that the dynamic nature of the pulsating flow greatly depends on the frequency of the flow *** is observed that the peak wall vorticity seems to increase with the increase of Reynolds number,the pulsating amplitude and the constriction *** peak values of instantaneous wall vorticity are not greatly affected by the variation of Womersly *** constriction length does not put a significant impact on the flow instantaneous streamline behaviors compared with other ***,the peak wall vorticity increases monotonically with the decrease of the constriction length.

关键词： Numerical modeling constriction tube pulsatile flow control volume.

Almost Everywhere convergence of Fejér Means of L^1 Functions on Rarely Unbounded Vilenkin groups

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Acta Mathematica Sinica,English Series 2007年第12期23卷 2269-2294页

作者： gyrgy gt college of Nyíregyháza Institute of Mathematics and Computer Science

A highly celebrated problem in dyadic harmonic analysis is the pointwise convergence of the Fejér （or （c, 1）） means of functions on unbounded Vilenkin groups. there are several papers of the author of this paper concerning this. that is, we know the a.e. convergence σnf → f （n → ∞） for functions f ∈ L^p, where p 〉 1 （Journal of Approximation theory, 101（1）, 1-36, （1999）） and also the a.e. convergence σMnf → f （n → ∞） for functions f ∈ L^1 （Journal of Approximation theory, 124（1）, 25-43, （2003））. the aim of this paper is to prove the a.e. relation limn→∞ σnf = f for each integrable function f on any rarely unbounded Vilenkin group. the concept of the rarely unbounded Vilenkin group is discussed in the paper. Basically, it means that the generating sequence m may be an unbounded one, but its ＂big elements＂ are not ＂too dense＂.

关键词： rarely unbounded Vilenkin groups Vilenkin series Fejér means a.e. convergence

Almost Everywhere convergence of Sequences of cesàro and Riesz Means of Integrable Functions with Respect to the Multidimensional Walsh System

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Acta Mathematica Sinica,English Series 2014年第2期30卷 311-322页

作者： gyrgy gt Institute of Mathematics and computer Science College of Nyíregyhza

the aim of this paper is to prove the *** of sequences of the cesaro and Riesz means of the Walsh–Fourier series of d variable integrable *** is,let a=（a1,...,ad）：N→Nd（d∈P）such that aj（n＋1）≥δsupk≤n aj（k）（j=1,...,d,n∈N）for someδ〉0 and a1（＋∞）=···=ad（＋∞）=＋∞.then,for each integrable function f∈L1（Id）,we have the *** for the cesaro means limn→∞σαa（n）f=f and for the Riesz means limn→∞σα,γa（n）f=f for any 0〈αj≤1≤γj（j=1,...,d）.A straightforward consequence of our result is the so-called cone restricted *** of the multidimensional cesaro and Riesz means of integrable functions,which was proved earlier by Weisz.

关键词： Walsh system d-dimensional Fejer and Riesz means subsequence almost everywhereconvergence