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Predicting chemical speciation of metals in soil using Visual Minteq

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Soil Ecology Letters 2023年第3期5卷 53-60页

作者： Sana Khalid Muhammad Shahid zeid a.alothman Abdullah a.al-Kahtani Behzad Murtaza Camille Dumat Department of Environmental Sciences COMSATS University IslamabadVehari 61100Pakistan Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia DYNAFOR INRAE&Toulouse INP France CERTOP CNRS-UT2J-UPS France

From soil contamination and risk assessment perspectives,it is imperative to understand the ecological processes occurring in *** soil processes greatly affect chemical speciation of potentially toxic metals(PTMs),and thus also influence their biogeochemical *** current study a.alyzed chemical speciation of eight PTMs(Cd,Cr,Fe,Cu,Mn,Ni,Zn,and Pb)in upper and lower soil layers for 15 agronomic fields of Vehari-Pakistan using Visual Minteq *** divalent forms of most PTMs(PTM^(2+))generally predominated in both soil layers(79.9%overall occurrence).However,chromium revealed a different pattern of chemical speciation(95.8%as CrOH^(+))compared to other *** mean percentage of all the PTMs2+was slightly higher for the lower soil layer(81.3%)than in the upper layer(78.4%),the trend being same for all the PTMs,except *** higher PTMs^(2+)percentage in lower soil layers than upper layers was due to lower content of organic matter and other anions such as Cl^(−)and HCO_(3)_(−).The mean percentage ages of all the PTMs^(2+)was similar among all the 15 agronomic fields,which was confirmed by strong Pearson correlation values(R^(2)>0.95).The PCA graph grouped all the agronomic fields and PTM^(2+) closely,except Cr^(2+) and Cu^(2+).This grouping confirmed the similar chemical speciation of PTMs,except Cu and Cr in studied fields.

关键词： heavy metals free ionic forms agricultural soils multivariate a.alysis PCA

Endoscopic ultrasound guided fine needle tissue acquisition:Where we stand in 2013?

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World Journal of Gastroenterology 2014年第9期20卷 2176-2185页

作者： zeid Karadsheh Mohammad al-Haddad Signature Healthcare Brockton Hospital Brockton MA 02320 United States Division of Gastroenterology and Hepatology Indiana University School of Medicine IN 46202 United States

Since its introduction,endoscopic ultrasound(EUS)guided fine needle aspiration and fine needle biopsy have become an indispensable tool for the diagnosis of lesions within the gastrointestinal tract and surrounding *** has proved to be an effective diagnostic method with high accuracy and low complication *** factors can influence the accuracy and the diagnostic yield of this procedure including experience of the endosonographer,availability of onsite cytopathology services,the method of cytopathology preparation,the location and physical characteristics of the lesion,sampling techniques and the type and size of the needle *** this review we will outline the recent studies evaluating EUS-guided tissue acquisition and will provide practical recommendations to maximize tissue yield.

关键词： Endoscopic ultrasound Fine needle aspiration Endoscopic ultrasound guided sampling techniques Cytological diagnosis Core biopsy device Gastrointestinal endoscopy

介孔载体嫁接的离子液体催化二氧化碳合成碳酸丙烯酯

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石油化工 2009年第12期38卷 1264-1269页

作者：张学兰 Abdullah S N al-Arifi Taieb Aouak zeid Abdullah al-othman 魏伟孙予罕中国科学院山西煤炭化学研究所煤转化国家重点实验室山西太原030001 中国科学院研究生院北京100049 Chemistry Department King Saud UniversityRiyadh 11451Kingdom of Saudi Arabia

将离子液体1-丙基(三乙氧基硅基)-3-甲基咪唑的氢氧化物([Smim]OH)分别嫁接到介孔SiO_2、MCM-41和SBA-15分子筛上制备了非均相嫁接型离子液体,用傅里叶变换红外光谱、N_2吸附、元素分析和热重分析等技术对3种非均相嫁接型离子液体进行... 详细信息

将离子液体1-丙基(三乙氧基硅基)-3-甲基咪唑的氢氧化物([Smim]OH)分别嫁接到介孔SiO_2、MCM-41和SBA-15分子筛上制备了非均相嫁接型离子液体,用傅里叶变换红外光谱、N_2吸附、元素分析和热重分析等技术对3种非均相嫁接型离子液体进行了表征。在无溶剂、温和的条件下,以非均相嫁接型离子液体为催化剂,研究了环氧丙烷(PO)与CO_2环加成合成碳酸丙烯酯的反应。实验结果表明,3种非均相嫁接型离子液体均具有较好的催化性能,[Smim]OH/SiO_2的催化性能最好;在[Smim]OH/SiO_2 1.260 mmol、PO 70 mmol、CO_22 MPa、120℃、8 h的优化反应条件下,PO的转化率可达99.5%;[Smim]OH/SiO_2重复使用4次后仍能保持较高的催化性能。

关键词：介孔载体离子液体催化剂二氧化碳环氧丙烷碳酸丙烯酯

a.al fistula: Intraoperative difficulties and unexpected findings

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World Journal of Gastroenterology 2011年第28期17卷 3272-3276页

作者： Ahmed A Abou-zeid Department of Surgery El Demerdash HospitalAin Shams University

a.al fistula surgery is a commonly performed *** diverse anatomy of a.al fistulae and their proximity to a.al sphincters make accurate preoperative diagnosis essential to avoid recurrence and fecal *** the fact that proper preoperative diagnosis can be reached in the majority of patients by simple clinical examination,endoa.al ultrasound or magnetic resonance imaging,on many occasions,unexpected findings can be encountered during surgery that can make the operation difficult and correct decision-making *** this article we discuss the difficulties and unexpected findings that can be encountered during a.al fistula surgery and how to overcome them.

关键词： a.al Cryptogenic Fistula Surgery

Intelligent Smart Grid Stability Predictive Model for Cyber-Physical Energy Systems

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Computer Systems Science & Engineering 2023年第2期44卷 1219-1231页

作者： Ashit Kumar Dutta Ma.al al Faraj Yasser albagory Mohammad zeid M alzamil Abdul Rahaman Wahab Sait Department of Computer Science and Information Systems College of Applied SciencesAlMaarefa UniversityAd DiriyahRiyadh13713Kingdom of Saudi Arabia Department of Computer Engineering College of Computers and Information TechnologyTaif UniversityTaif21944Kingdom of Saudi Arabia Department of Archives and Communication King Faisal UniversityAl AhsaHofuf31982Kingdom of Saudi Arabia

A cyber physical energy system(CPES)involves a combination of pro-cessing,network,and physical *** smart grid plays a vital role in the CPES model where information technology(IT)can be related to the physical *** the same time,the machine learning(ML)modelsﬁnd useful for the smart grids integrated into the CPES for effective decision ***,the smart grids using ML and deep learning(DL)models are anticipated to lessen the requirement of placing many power plants for electricity *** this aspect,this study designs optimal multi-head attention based bidirectional long short term memory(OMHA-MBLSTM)technique for smart grid stability predic-tion in *** proposed OMHA-MBLSTM technique involves three subpro-cesses such as pre-processing,prediction,and hyperparameter *** OMHA-MBLSTM technique employs min-max normalization as a pre-proces-sing ***,the MBLSTM model is applied for the prediction of stability level of the smart grids in *** the same time,the moth swarm algorithm(MHA)is utilized for optimally modifying the hyperparameters involved in the MBLSTM *** ensure the enhanced outcomes of the OMHA-MBLSTM technique,a series of simulations were carried out and the results are inspected under several *** experimental results pointed out the better outcomes of the OMHA-MBLSTM technique over the recent models.

关键词： Stability prediction smart grid cyber physical energy systems deep learning data a.alytics moth swarm algorithm

In vitro anticancer activity of polysaccharide extracted from red alga Jania rubens against breast and colon cancer cell lines

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Asian Pacific Journal of Tropical Medicine 2018年第10期11卷 583-589页

作者： Saly Gheda Mostafa El-Sheekh alaa Abou-zeid Botany Department Faculty of Science Tanta University

Objective: To evaluate the potential role of the polysaccharides of the marine algae as an anticancer agent in vitro against colon cancer cell line(CoCa2) and breast cancer(MCF7) cell lines and to measure lactate dehydrogenase enzyme(LDH) activity as biomarker of membrane integrity of the cells. Methods: The cells of breast cancer(MCF7) and colon cancer(CoCa2)were used to evaluate the potential anticancer role of the polysaccharides of marine algae. Antiproliferative activity against MCF7 and CoCa2 cell lines were evaluated in vitro by the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2 H-tetrazolium bromide(MTT) assay. Results: The in vitro assay of the antioxidant activity of eight marine seaweed species showed that the red seaweed Jania rubens(J. rubens) had the highest DPPH(2,2 diphenyl-1-picrylhydrazyl) free radical scavenging activity. The extracted polysaccharides with concentrations 0.1–40.0 mg/mL from J. rubens were tested for its anticancer potentiality and cytotoxic effects against the cell lines of human breast(MCF7) and colon cancer(CoCa2) cell lines by MTT assay. The inhibitory concentration at 50 (IC_(50)) value the of J. rubens polysaccharide extract was 0.312 5 mg/mL for MCF7 and 20 mg/mL for CoCa2. LDH activity and annexin V concentration were higher in the treated MCF7 and CaCo2 cells than in the untreated ones. Quantitative polymerase chain reaction technique indicated that the polysaccharide treatments caused up-regulation of Bax, caspase 8 and P53 genes expression in CoCa2 cells, and up-regulation of caspase 3 and down-regulation of Bcl2 genes expression in MCF7 cells. Conclusions: The polysaccharides of the red marine alga J. rubens could be a potential candidate for the natural compounds as antioxidant and anticancer therapy.

关键词： Marine algae Antioxidant activity Cytotoxicity Apoptosis Lactate dehydrogenase Polymerase chain reaction

Decreased apoptosis in advanced-stage/high-grade hepatocellular carcinoma complicating chronic hepatitis C is mediated through the downregulation of p21 ras

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Chinese Journal of Cancer Research 2013年第3期25卷 281-288页

作者： Nahed Baddour Ebtehal Farrag Ahmed zeid Essam Bedewy Yousry Taher Departments of Pathology Alexandria Egypt Departments of Hepatobiliary Unit Internal MedicineAlexandria Egypt Departments of Tropical Medicine of the alexandria Faculty of Medicine Alexandria Egypt

Objective and background： although p21 ras has been reported to be upregulated in hepatocellular carcinoma complicating chronic hepatitis C type I, p21 ras has a different role in advanced stages, as it has been found to be downregulated. The goal of this study was to investigate the status of p21 ras in early-stage/low-grade and late-stage/high-grade hepatocellular carcinoma and its possible link to apoptosis. Material and methods： Thirty-five cases each of chronic HCV hepatitis type 4 （group I） and cirrhosis with hepatocellular carcinoma （HCC） complicating chronic HCV hepatitis （groups Ⅱ and Ⅲ） were immunohistochemically evaluated using a p21 ras polyclonal antibody. The apoptotic index was determined in histologic sections using the terminal deoxynncleotidyl transferase-mediated d-UTP biotin nick end labeling （TUNEL） assay. Results： Significant differences （P=0.001） were detected in p21 ras protein expression between the three groups. A near 2-fold increase in p21 ras staining was observed in the cirrhotic cases compared to the hepatitis cases, and p21 ras expression was decreased in the HCC group, p21 ras expression correlated with stage （r=0.64, P--0.001） and grade （r=-0.65, P=0.001） in the HCC group and grade in the HCV group （r=0.44, P=0.008）. Both p21 ras expression and TUNEL-LI were significantly lower in large HCCs compared to small HCCs （P=0.01 each）. The TUNEL values were negatively correlated with stage in the HCC group （r=-0.85, P=0.001）. The TUNEL values were also negatively correlated with grade in both the HCV and HCC groups （r=0.89, P=0.001 and r=0.53, P=0.001, respectively）. The p21 ras scores were significantly correlated with the TUNEL-LI values in the HCC group （r=0.63, P=0.001） and HCV group （r=0.88, P=0.001）. Conclusions： p21 ras acts as an initiator in HCC complicating type 4 chronic HCV and is downregulated with HCC progression, which most likely promotes tumor cell survival because it facilitates the downregulation of apoptosis with tumor

关键词： p21 ras terminal deoxynucleotidyl transferase-mediated d-UTP biotin nick end labeling (TUNEL) apoptosis HCV type 4 hepatocellular carcinoma

Acid-treated carbon nanotubes and their effects on mortar strength

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Frontiers of Structural and Civil Engineering 2016年第2期10卷 180-188页

作者： M. ELKASHEF K. WANG M.N. ABOU-zeid Civil Construction and Environmental Engineering Department Iowa State University Ames IA 50011-2151 USA Construction and Architectural Engineering Department The American University in Cairo Egypt

In the present study, multi-walled carbon nanotubes （MWCNTs） were treated in an acidic mixture solution, made with nitric and sulfuric acids in a ratio of 3：1 by volume. The durations of the treatment were 100 and 180 min. The defects of these treated MWCNTs were examined using Raman spectroscopy. The attachment of hydroxyl functional groups to the walls of the MWCNTs were verified using FTIR spectroscopy. The dispersion of CNTs with acid treatment is assessed using UV-Vis spectroscopy and Scanning Electron Microscopy （SEM）. The results indicate that the duration of the acid treatment has significant effect on both the degree of defects and functionality of the MWCNT. The compressive strength of mortar increased with the addition of the acid-treated MWCNTs; however, no appreciable difference was noted for the two treatment durations under this study.

关键词： carbon nanotubes concrete composites nanomaterials cement

Bilateral renal cortical necrosis associated with smoking synthetic cannabinoids

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World Journal of Clinical Cases 2017年第6期5卷 234-237页

作者： Kanaan Mansoor Ashley Zawodniak Tibor Nadasdy zeid J Khitan Internal Medicine Department Joan C Edwards School of Medicine Marshall University Department of Renal and Transplant Pathology the Ohio State University

Synthetic cannabinoids have become a common drug of abuse in recent years and their toxicities have come to light as well. They are known to be notorious for the kidneys, with acute tubular necrosis, acute interstitial nephritis and rhabdomyolysis induced renal injury being the frequent nephrotoxic outcomes in users. We report a case of bilateral renal cortical necrosis, leading to irreversible renal damage and lifelong dialysis dependency.

关键词： Synthetic cannabinoids Renal cortical necrosis Dialysis