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Multi-media compartments for assessing ecological and health risks from concurrent exposure to multiple contaminants on Bhola Island,Bangladesh

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Emerging Contaminants 2022年第1期8卷 134-150页

作者： Tasrina Rabia Choudhury Tanjeela Islam Abu Reza md Towfiqul Islam md Hasanuzzaman Abubakr M.Idris M.Safiur Rahman Edris Alam A.M.Sarwaruddin Chowdhury Analytical Chemistry Laboratory Chemistry DivisionAtomic Energy Centre DhakaBangladesh Atomic Energy CommissionDhaka1000Bangladesh Department of Applied Chemistry and Chemical Engineering University of DhakaDhaka1000Bangladesh Department of Disaster Management Begum Rokeya UniversityRangpur5400Bangladesh Department of Chemistry College of ScienceKing Khalid UniversityAbha61431Saudi Arabia Research Center for Advanced Materials Science(RCAMS) King Khalid UniversityAbhaSaudi Arabia Water Quality Research Laboratory Chemistry DivisionAtomic Energy Centre DhakaBangladesh Atomic Energy CommissionDhaka1000Bangladesh Faculty of Resilience Rabdan AcademyAbu Dhabi22401United Arab Emirates Department of Geography and Environmental Studies University of ChittagongChittagong4331Bangladesh

In this study,a set of coupled multi-media compartments(i.e.,sediment,soil,water and vegetable)was used to assess ecological and health risks from the ingestion of 11 PTEs(Pb,Cd,Cr,As,Hg,Cu,Zn,Ni,Co,Fe,and Mn)and their transportation routes in the water-soil-plant system from the coastal Bhola Island,*** mean concentrations of Cd,Pb,and Co for soil and Cd,Co,and As for sediment were higher than their reference *** contrast,Cd,Pb,and Ni concentrations in water surpassed the acceptable limits set by national and international laws and were considered unsuitable for drinking *** demonstrated high Pb and Cd contents,demonstrating a potential food safety risk to the *** of principal component analysis(PCA)revealed that Cd,Pb,Hg,Cu,Ni and Zn sources were likely to be anthropogenic,especially agro-farming inputs,whereas the Fe,As,Cr,Mn,and Co sources were similar to natural ***,Cd,Pb and Co are the key contaminants in the study area and pose the elevated health and ecological risks in the coastal *** and Pb exhibited higher ecological risks in soils and sediments,as Pb had the highest bio-accessibility(BA;0.02±0.003)and Cd possessed a high bioaccumulation factor(BCF;0.004±0.006).The self-organizing map analysis recognized three spatial patterns which are good agreement with *** average hazard index(HI)values for soil were above the permissible level(HI>1)set by the respective agency;two times higher HI values were noticed for children than adults,suggesting children are highly susceptible to health *** monitoring and source controls for Cd and Pb,along with agro-farming management practices,need to be implemented to reduce the risk of PTE contamination to the aquatic ecosystem and its inhabitants.

关键词： Health risk assessment Potentially toxic elements Coastal environment Water-soil-plants Aquatic ecosystem

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Performance Evaluation of a DS-CDMA System in a Rayleigh Fading Environment

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World Journal of Engineering and Technology 2016年第1期4卷 1-9页

作者： M. A. Rahman M. M. Alam md. khalid Hossain md. Khairul Islam Khan M. Nasir Uddin md. Shahinuzzaman Department of Applied Physics Electronics & Communication Engineering Islamic University Kushtia Bangladesh Institute of Electronics Atomic Energy Research Establishment Savar Bangladesh

This work represents the performance evaluation of DS-CDMA in a Rayleigh fading environment. Performance analysis was carried out for a DS-CDMA system to evaluate the signal-to-noise ratio (SNR), signal-to-interference ratio (SIR) and bit error rate (BER) for different modulation schemes like ASK, PSK and FSK. Results were evaluated at different data rates and were presented in terms of SNR, SIR and BER. Computer simulation was also carried out by using Matlab to evaluate the signal waveforms with and without addition white Gaussian noise (AWGN). Butterworth filtered waveform was given to get better signal quality. Decoded output waveforms were also evaluated to confirm the simulation.

关键词： DS-CDMA Rayleigh Fading Performance Analysis SNR BER ASK PSK FSK MATLAB AWGN

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Modes of failure with fractional flow reserve guidewires:Insights from the manufacturer and user facility device experience database

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World Journal of Cardiology 2021年第7期13卷 223-229页

作者： Nauman khalid Yagya Pandey Umair khalid Hassan Kamran Jason P Wermers Lovely Chhabra Mahboob Alam Hani Jneid Waleed Tallat Kayani Department of Interventional Cardiology St.Francis Medical CenterMonroeLA 71201United States Department of Internal Medicine Baylor College of MedicineHoustonTX 77030United States Department of Interventional Cardiology Michael E.DeBakey VA Medical CenterHoustonTX 77030United States Department of Interventional Cardiology Baylor College of MedicineHoustonTX 77030United States Health Sciences University of Maryland Graduate SchoolBaltimoreMD 21201United States

BACKGROUND Fractional flow reserve(FFR)measurement is commonly used in the cardiac catheterization laboratory to assess the functional significance of coronary arterial *** real-world data on complications and modes of failure of FFR guidewires are *** To characterize these outcomes by analyzing the post-marketing surveillance data from the United States Food and Drug Administration Manufacturer and User Facility Device Experience(MAUDE)database for commonly used FFR *** The MAUDE database was queried from January 2010 through April 2020 for 3 FFR guidewires[PressureWireTM X(Abbott),CometTM(Boston Scientific),and VerrataTM(Philips)]by searching for the following events:“Injury”,“malfunction”,“death”,and“other”.This yielded 544 *** excluding incomplete reports,486 reports were *** Guidewire tip fracture was the most commonly reported mode of failure,in 174(35.8%)cases followed by guidewire kinking(n=152,31.3%),communication failure(n=141,29.0%),and shaft fracture(n=67,13.8%).In total,133(27.4%)device failures resulted in patient adverse *** most common adverse event was retained guidewire tip,in 71(53.4%)cases,followed by freshly deployed stent dislodgment(n=26,19.6%)and coronary artery dissection(n=23,17.3%).Seven deaths were *** FFR guidewire failures can occur because of various mechanisms and cause patient adverse *** MAUDE database serves as an important platform for improved collaboration among clinicians,device manufacturers,and regulators to improve device performance and optimize patient *** analysis provides mechanistic insights of FFR guidewire failure and associated adverse events but cannot verify causality or provide a comparison among different guidewires.

关键词： Fractional flow reserve Coronary guidewire Adverse events Modes of failure Food and Drug Administration Manufacturer and user facility device experience

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Biological investigations of medicinal plants of Heliotropium indicum indigenous to Bangladesh

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Journal of Coastal Life Medicine 2016年第11期4卷 874-878页

作者： Karim Samira Kawsar md Farhina Rahman Laboni Azima Sultana Julie Uddin Jalal Zubair khalid Labu Department of Pharmacy World University of Bangladesh(WUB)151/8 Green RoadDhakaBangladesh

Objective:To investigate the clot lysis,antimicrobic and membrane stabilizing potentials of ethanolic extractives of the leaves of Heliotropium indicum(***).Methods:Crude ethanolic extracts of *** leaves were partitioned successively using solvents of different polarity and subjected to determine qualitatively and quantitatively for the presence of different bioactive constitutes and fractions which were assessed for their possible clot lysis,antimicrobic,and membrane stabilizing activities as compared with the known ***:For the thrombolytic activity,the petroleum ether soluble fraction showed the highest percent of clot lysis(35.4%)among all fractions,while streptokinase and water resulted in 65.15%and 3.77%clot lysis,*** respect to the membrane stabilizing activity,carbon tetrachloride soluble fraction of *** profoundly interdicted the hemolysis of erythrocytes brought about by osmotic induction(39.24%)or by heat(40.20%).The other fractions exhibited less significant membrane stabilizing *** contrast,acetylsalicylic acid resulted in 72.25%±0.30%inhibition of osmotically induced hemolysis and showed a lower level of protection of heat induced hemolysis(42.56%).Crude ethanolic extracts were moderately sensitive against known pathogenic *** pharmacological activities of *** are due to the presence of bioactive compounds,we detected and quantified the presence of significant levels of flavonoid and tannin ***:The outcomes of this research show that the leaves of *** have the potential to be used as a remedy for thrombosis,inflammatory diseases and against few important bacterial pathogens.

关键词： Heliotropium indicum Thrombolytic Membrane stabilizing Antimicrobial activity

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Evaluation of modifi ed Alvarado scoring system and RIPASA scoring system as diagnostic tools of acute appendicitis

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World Journal of Emergency Medicine 2017年第4期8卷 276-280页

作者： Abdullah Shuaib Ali Shuaib Zainab Fakhra Bader Marafi khalid Alsharaf Abdullah Behbehani Department of Surgery Kuwait Mubarak Alkabeer Hospital Jabriya Kuwait Biomedical Engineering Unit Physiology Department Faculty of Medicine Kuwait University Kuwait City Kuwait md in internship year Kuwait Institute of Medical Specialization Kuwait City Kuwait Department of Surgery Faculty of Medicine Kuwait University Kuwait City Kuwait

BACKGROUND: Acute appendicitis is the most common surgical condition presented in emergency departments worldwide. Clinical scoring systems, such as the Alvarado and modified Alvarado scoring systems, were developed with the goal of reducing the negative appendectomy rate to 5%–10%. The Raja Isteri Pengiran Anak Saleha Appendicitis(RIPASA) scoring system was established in 2008 specif ically for Asian populations. The aim of this study was to compare the modif ied Alvarado with the RIPASA scoring system in Kuwait ***: This study included 180 patients who underwent appendectomies and were documented as having "acute appendicitis" or "abdominal pain" in the operating theatre logbook(unit B) from November 2014 to March 2016. The sensitivity, specificity, positive predictive value(PPV), negative predictive value(NPV), diagnostic accuracy, predicted negative appendectomy and receiver operating characteristic(ROC) curve of the modified Alvarado and RIPASA scoring systems were derived using SPSS statistical ***: A total of 136 patients were included in this study according to our criteria. The cut-off threshold point of the modif ied Alvarado score was set at 7.0, which yielded a sensitivity of 82.8% and a specif icity of 56%. The PPV was 89.3% and the NPV was 42.4%. The cut-off threshold point of the RIPASA score was set at 7.5, which yielded a 94.5% sensitivity and an 88% specif icity. The PPV was 97.2% and the NPV was 78.5%. The predicted negative appendectomy rates were 10.7% and 2.2% for the modif ied Alvarado and RIPASA scoring systems, respectively. The negative appendectomy rate decreased significantly, from 18.4% to 10.7% for the modified Alvarado, and to 2.2% for the RIPASA scoring system, which was a signif icant difference(P<0.001) for both scoring ***: Based on the results of this study, the RIPASA score is a simple scoring system with better sensitivity and specif icity than the modif ied Alvarado scoring system in A

关键词： Acute appendicitis Modifi ed Alvarado score RIPASA score

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喜来芝石中提取的腐植酸与阿司匹林的分子络合物及其表征

喜来芝石中提取的腐植酸与阿司匹林的分子络合物及其表征

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第八届全国绿色环保肥料（农药）新技术、新产品交流会

作者： md.khalid Anwer Suraj P.Agarwal Asgar Ali Yasmin Sultana 黄静佳米雅综合大学药剂学院中国腐植酸工业协会

阿司匹林具有退热、消炎和抗血小板凝集的作用。乙酰水杨酸分子含一个羧基和一个酯基。酯基容易被水解,导致其药效降低,并会对人体产生副作用。本研究的目的是用冻干技术和溶剂挥发技术,以原料的摩尔比为1:1和1:2,制备阿司匹林和腐植酸... 详细信息

阿司匹林具有退热、消炎和抗血小板凝集的作用。乙酰水杨酸分子含一个羧基和一个酯基。酯基容易被水解,导致其药效降低,并会对人体产生副作用。本研究的目的是用冻干技术和溶剂挥发技术,以原料的摩尔比为1:1和1:2,制备阿司匹林和腐植酸固态配合物。阿司匹林和腐植酸分子间相互作用通过差示扫描量热法(DSC)、X射线衍射(XRD)和扫描电子显微镜(SEM)法进行研究。用这些技术能清晰表明固态包内配合物的结构。对摩尔比为1:2冻干配合物研究表明阿司匹林的稳定性和溶出率显著提高。优选的冻干阿司匹林与腐植酸(1:2)配合物对抑制鼠爪水肿和抗溃疡作用测得的最低值(0.63±0.10)与单纯的阿司匹林相比,有明显的降低,证明用其治疗具有非常显著的抗炎作用(p<0.05)。

关键词：阿司匹林喜来芝石腐植酸表征稳定性生物利用度

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Efficiency of Aluminium and Copper Coated Aluminium Electrode in Hydrogen Fuel Generation from Rain Water

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Energy and Power Engineering 2020年第6期12卷 348-356页

作者： md. khalid Saklin Rajib Chandra Das Yeasmin Akther Sanchita Dewanjee Sujan Kanti Das Tania Sabnam Binta Monir Susmita Mondal Department of Applied Chemistry and Chemical Engineering Noakhali Science and Technology University Noakhali Bangladesh Bangladesh Council of Scientific and Industrial Research Chattogram Bangladesh Department of Pharmacy Noakhali Science and Technology University Noakhali Bangladesh

Water electrolysis is considered as the most capable and old technology for hydrogen fuel preparation. Electrolysis needs external electrical energy through electrodes to split water into hydrogen and oxygen. An efficient electrolysis requires suitable electrodes to minimize potential drop. In this study Aluminium and Copper Coated Aluminium were used as different combination of Anodes and Cathodes to find out more efficient electrodes combination. NaCl solution in rain water was taken as electrolyte. Rain water was taken to avoid ionic impedance of tap water and expenses of distilled water. In this study, the most efficient electrode combination was Copper Coated Aluminium (anode)-Aluminium (cathode) and gave the highest efficiency of hydrogen production to about 11% at normal temperature for very low concentration of NaCl (0.051 M) which increased with temperature, up to 29% upon rising of temp to 60°C. It was showed that higher concentration of electrolyte would surge the efficiency significantly. If the supplied heat could be provided from any waste heat sources then this study would be more efficient. However, current research evaluated the technical feasibility of this electrode combination for producing hydrogen with electrolysis of rain water utilizing ele

关键词： Hydrogen Production Electrochemistry Water Electrolysis Copper Coated Aluminum Rain Water

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Electrocardiographic changes in Emphysema

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World Journal of Cardiology 2021年第10期13卷 533-545页

作者： Puneet Gupta Hitangee Jain Misbah Gill Gurpreet Bharaj Nauman khalid Waseem Chaudhry Lovely Chhabra Department of Interventional Cardiology Northeast Ohio Medical UniversityCantonOH 44272United States BA-md Brooklyn CollegeBrooklynNY 11210United States Department of Family Medicine Memorial Hospital of CarbondaleCarbondaleIL 62901United States Psychiatry Loretto HospitalChicagoIL 60644United States Department of Interventional Cardiology St.Francis Medical CenterMonroeLA 71201United States Department of Cardiology Westchester Medical Center Network Advanced Physician ServicesPoughkeepsieNY 12601United States

Chronic obstructive lung disease(COPD),predominantly emphysema,causes several thoracic anatomical and hemodynamic changes which may cause changes in various electrocardiographic parameters.A 12-lead electrocardiogram(ECG),which is often a part of routine evaluation in most clinical settings,may serve as a useful screening modality for diagnosis of COPD or *** current article aims to provide a comprehensive review of the electrocardiographic changes encountered in COPD/emphysema utilizing published PubMed and Medline literature *** important ECG changes are present in COPD/emphysema and may serve as a good diagnostic *** of Pvector,changes in QRS duration,pattern recognition of precordial R-wave progression and axial shifts can be considered some of the most valuable markers among other *** conclusion,12-lead surface electrocardiogram can serve as a valuable tool for the diagnosis of COPD and/or *** appropriate knowledge of these ECG changes can not only help in the diagnosis but can also immensely help in an appropriate clinical management of these patients.

关键词： Emphysema Chronic obstructive pulmonary disease Electrocardiogram Pwave axis Sensitivity Specific

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关节假体真菌感染的微生物学临床及手术特点：一项多机构经验

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中华骨科杂志 2010年第9期30卷 I0019-I0024页

作者： khalid.azzam, md Javad Parvizi, md FRCS, Donald Jungkind, PhD Diplomate (ABMM) Arlen Hanssen, md ThomasFehring, md Bryan Springer, md Kevin Bozic, md Craig Della Valle, md Luis Pulido, md Robert Barrack, md 曹沛宏(译) 不详天津医院关节科 300211

关节假体周围感染是关节置换术后最可怕、最复杂的并发症。关节假体周围感染是目前全膝关节置换失败的最主要原因，是全髋关节置换失败原因的第三位。估计关节假体周围感染的发病率正逐渐上升。很多原因导致关节假体周围感染，最主要的... 详细信息

关节假体周围感染是关节置换术后最可怕、最复杂的并发症。关节假体周围感染是目前全膝关节置换失败的最主要原因，是全髋关节置换失败原因的第三位。估计关节假体周围感染的发病率正逐渐上升。很多原因导致关节假体周围感染，最主要的原因是革兰氏阳性细菌感染，特别是链球菌。

关键词：关节假体手术特点微生物学真菌感染假体周围感染革兰氏阳性细菌感染全膝关节置换临床

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Exploring the practice of common oral diseases among the patients visiting in the selected dental college and hospital in Bangladesh

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Life Research 2022年第4期5卷 1-5页

作者： khalid Hasan Pasha md.Fazlul Karim md.Mahmudur Rahman Ashek Elahi Noor md.Mamunur Rashid Nahid Al Nomann Kazi Golam Mohiuddin Department of Oral&Maxillofacial Surgery Sapporo Dental College and HospitalDhaka-1230Bangladesh Department of Microbiology Kumudini Women’s Medical CollegeMirzapurTangail-1900Bangladesh Department of Gastroenterology Dhaka Medical College and HospitalDhaka-1312Bangladesh Department of Dental Public Health Sapporo Dental College and HospitalDhaka-1230Bangladesh New Labaid Diagnostic Center&Hospital Brahmanbaria-3400Bangladesh Department of Science of Dental Materials Sapporo Dental College and HospitalDhaka-1230Bangladesh

Background:Having the ability to identify potential health risk factors such as lifestyle,ethnicity,health status,and social determinants associated with oral health status risk,health care providers can take an active role in health screening to discover any need for clinical preventive services,including dental preventive services,and can detect health ***:A descriptive type of cross-sectional study was conducted to explore the practice of common oral diseases among the patients visiting in the selected dental college and hospital in Bangladesh from October 2019 to December *** 100 patients were interviewed through a semi-structured questionnaire,followed by an oral examination through a checklist and a face-to-face interview.A systematically random sampling technique was employed to select the study ***:Among them,the(21-30)year age group shows a maximum 20%,whereas the(71-80)year age group represents the minority with only 2%.Among them,56%were male and 44%were *** represent the majority of 26%,whereas others(day laborers)represent only 4%.Decayed teeth remained in 72%of cases,teeth were missing in 31%of cases,and filled teeth were present in 24%of cases.A majority of 71%clean teeth once daily,whereas only 29%clean teeth twice ***,only 30%brush teeth at night and a maximum of 95%brush teeth in the ***,a maximum of 68%use toothpaste and brushes,while only 4%use meswak for cleaning their *** 4%of cases with no debris,51%of cases with less than 1/3rd of the tooth with debris,32%of cases with 1/3rd-2/3rd of the tooth with debris,and 13%of cases with more than 2/3rd of the tooth with debris were ***,about 30%had no calculus,52%less than 1/3rd of tooth,16%in between 1/3rd and 2/3rd of tooth,and 2%more than 2/3rd of the calculus was *** 47%of mild,22%of moderate,6%of severe and 25%had no ***,for treatment purposes,20.69%was advised for scaling,19.66%for

关键词： dental caries abscess broken down root broken down crown decayed missing filled tooth root canal treatment orthopentomogram intra oral periapical cone beam computed tomography body mass index

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