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Biosorption characteristics of unicellular green alga Chlorella sorokiniana immobilized in loofa sponge for removal of Cr(Ⅲ)

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Journal of Environmental Sciences 2008年第2期20卷 231-239页

作者： AKHTAR Nasreen iqbal Muhammad ZAFAR saeed iqbal iqbal Javed Department of Biology Government lslamia College for WomenCooper RoadLahore-54550Pakistan. Environment Biotechnology Group Biotechnology and Food Research CentrePCSIR Laboratories ComplexLahore-54600Pakistan. School of Biological Sciences University of PunjabLahore-54570Pakistan.

Loofa sponge （LS） immobilized biomass of Chlorella sorokiniana （LSIBCS）, isolated from industrial wastewater, was investigated as a new biosorbent for the removal of Cr（Ⅲ） from aqueous solution. A comparison of the biosorption of Cr（Ⅲ） by LSIBCS and free biomass of C. sorokiniana （FBCS） from 10-300 mg Cr（Ⅲ）/L aqueous solutions showed an increase in uptake of 17.79% when the microalgal biomass was immobilized onto loofa sponge. Maximum biosorption capacity for LSIBCS and FBCS was found to be 69.26 and 58.80 mg Cr（Ⅲ）/g biosorbent, respectively, whereas the amount of Cr（Ⅲ） ions adsorbed onto naked LS was 4.97 mg/g. The kinetics of Cr（Ⅲ） biosorption was extremely rapid and equilibrium was established in about 15 and 20 min by LSIBCS and FBCS, respectively. The biosorption equilibrium was well defined by Langmuir adsorption isotherm model. The biosorption kinetics followed the pseudo-second order kinetic model. The biosorption was found to be pH dependent and the maximum sorption occurred at the solution pH 4.0. Desorption studies showed that 98% of the adsorbed Cr（Ⅲ） could be desorbed with 0.1 mol/L HNO3, while other desorbing agents were less effective in the order： EDTA 〉 H2SO4 〉 CH3COOH 〉 HCl. The regenerated LSIBCS retained 92.68% of the initial Cr（Ⅲ） binding capacity up to five cycles of reuse in continuous flow-fixed bed columns. The study revealed that LSIBCS could be used as an effective biosorbent for the removal of Cr（Ⅲ） from wastewater.

关键词： biosorption immobilization loofa sponge Chlorella sorokiniana Cr(Ⅲ) desorption fixed bed column reactor

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Hybridization of CNN with LBP for Classification of Melanoma Images

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Computers, Materials & Continua 2022年第6期71卷 4915-4939页

作者： saeed iqbal Adnan N.Qureshi Ghulam Mustafa Faculty of Information Technology University of Central PunjabLahorePakistan Department of Computer Sciences Bahria University Lahore CampusPakistan

Skin cancer(melanoma)is one of the most aggressive of the cancers and the prevalence has significantly increased due to increased exposure to ultraviolet ***,timely detection and management of the lesion is a critical consideration in order to improve lifestyle and reduce *** this end,we have designed,implemented and analyzed a hybrid approach entailing convolutional neural networks(CNN)and local binary patterns(LBP).The experiments have been performed on publicly accessible datasets ISIC 2017,2018 and 2019(HAM10000)with data augmentation for in-distribution *** a novel contribution,the CNN architecture is enhanced with an intelligible layer,LBP,that extracts the pertinent visual *** of Basal Cell Carcinoma,Actinic Keratosis,Melanoma and Squamous Cell Carcinoma has been evaluated on 8035 and 3494 cases for training and testing,*** outcomes with cross-validation depict a plausible performance with an average accuracy of 97.29%,sensitivity of 95.63%and specificity of 97.90%.Hence,the proposed approach can be used in research and clinical settings to provide second opinions,closely approximating experts’intuition.

关键词： Skin cancer convolutional neural network feature extraction local binary pattern classification

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钢筋混凝土填充墙框架连续倒塌的影响因素研究

钢筋混凝土填充墙框架连续倒塌的影响因素研究

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作者： Muhammad saeed iqbal 哈尔滨工业大学

学位级别：硕士

建筑物的主要承重构件发生破坏会导致其发生连续倒塌。任何极端事件都可能造成主要承重构件的破坏,例如炸弹爆炸、火灾或恐怖袭击。如果建筑物的设计不能承受极端事件产生的偶然荷载,那将会发生灾难性的倒塌。由于设计和施工较为简单,... 详细信息

建筑物的主要承重构件发生破坏会导致其发生连续倒塌。任何极端事件都可能造成主要承重构件的破坏,例如炸弹爆炸、火灾或恐怖袭击。如果建筑物的设计不能承受极端事件产生的偶然荷载,那将会发生灾难性的倒塌。由于设计和施工较为简单,带有填充墙的钢筋混凝土框架在世界范围内得到了广泛的应用。影响钢筋混凝土填充墙框架连续倒塌的因素有很多。本研究的目的是分析影响钢筋混凝土填充墙框架连续倒塌的主要因素。本研究中涉及的参数与关键结构构件的材料特性、几何形状、柱损失位置以及楼板有关。对于每个参数,选择不同的变化范围,并探讨了其影响。为了实现上述目标,利用有限元软件ABAQUS建立了数值模型,并采用现有的实验数据对数值模拟的结果进行了验证。数值模拟结果与实验结果吻合良好,证实了有限元方法在预测连续倒塌情况下的结构响应的有效性。通过改变混凝土和填充墙的抗压强度,研究了混凝土和填充墙材料性能的影响。结果表明,在连续倒塌过程中,填充墙的抗压强度对竖向荷载的抗力有显著影响。降低填充墙的抗压强度会降低对角抗压结构的强度。另一方面,在连续倒塌期间,降低梁混凝土的抗压强度不会降低梁的峰值承载力。通过选取不同强度等级的钢材来评估钢材材料性能的影响。结果表明,梁纵向钢筋的强度等级有影响,而横向钢筋的强度等级没有影响,增加梁钢筋的屈服强度和极限强度优于增加面积。填充墙几何形状的影响是通过比较拱型和矩形开口的性能来确定的,这些开口在跨度中具有不同的开口率和开口位置。两者都有不同的荷载传递机制。拱形洞口比矩形洞口具有更好的抵抗能力。填充墙开口的位置也对抗力有很大影响。洞口超过50%的填充位置几乎没有影响。柱损失位置也会产生影响,建筑物角柱的损失会降低连续倒塌的抵抗能力。

关键词：连续倒塌混凝土框架填充墙参数研究有限元分析

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SER estimation method for 56 GBaud PAM-4 transmission system

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Chinese Optics Letters 2018年第4期16卷 30-34页

作者： Aadil Raza Kangping Zhong Salman Ghafoor saeed iqbal Muhammad Adeel Shahid Habib Muhammad Fasih Uddin Butt Chao Lu COMSATS Institute of Information Technology (CIIT) Islamabad Pakistan Department of Electronic and Information Engineering The Hong Kong Polytechnic University Hong Kong China National University of Sciences and Technology (NUST) Islamabad Pakistan

In this Letter, we have proposed a generalized Gaussian probability density function（GGPDF）-based method to estimate the symbol error ratio（SER） for pulse amplitude modulation（PAM-4） in an intensity modulation/direct detection（IM/DD） system. Furthermore, a closed form expression of SERGGDfor PAM-4 has been derived. The performance of the proposed method is evaluated through simulation as well as experimental *** fitting of probability density functions of the received signal is applied via GGPDF and shape parameters P1 and P2 associated with different PAM-4 levels are determined. The optimum single value of shape parameter P is then calculated to estimate the SER. The mathematical relationship of P with different received optical powers and receiver bandwidths has been determined and verified. The proposed method is a fast and accurate method to estimate SER of a PAM-4 system, which is more reliable and in agreement with the error counting method.

关键词： PAM SER estimation method for 56 GBaud PAM-4 transmission system

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原发性眼内良性病变的分析(英文)

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国际眼科杂志 2009年第4期9卷 634-641页

作者： Partab Rai Syed Imtiaz Ali Shah Ashok Kumar Narsani Javed Hassan Niazi Memon Muhammad Khan saeed iqbal 钱德拉医科大学医院眼科巴基斯坦拉尔卡纳利雅卡特大学医学及健康科学院眼科基斯坦信德省海得拉巴真纳研究生医学中心眼科巴基斯坦卡拉奇 Kalsoom Bai Walika社会保障服务医院眼科巴基斯坦卡拉奇 Sir Syed医科大学健康与医学科学院眼科巴基斯坦卡拉奇

目的:研究原发性眼内良性病变的表现形式并指出其常见诱因。方法:从1997-07/2001-08,研究在真纳研究生医学中心眼科进行。2001-09在钱德拉医科大学医院眼科。研究只涉及患有原发性眼内良性病变的患者,他们均有院外住院病史。诊断基于患... 详细信息

目的:研究原发性眼内良性病变的表现形式并指出其常见诱因。方法:从1997-07/2001-08,研究在真纳研究生医学中心眼科进行。2001-09在钱德拉医科大学医院眼科。研究只涉及患有原发性眼内良性病变的患者,他们均有院外住院病史。诊断基于患者的表征,临床检查,调查及切除肿块的组织病理学。共68名患者,年龄2mo ～60岁,男27例(39.7%),女41例(60.3%),35例(51.5%)左眼患病,33例(48.5%)右眼患病。结果:原发性眼内良性病变患者68例中,26例(38.2%)为眼睑浅表性毛细管血管瘤,5例(7.4%)为深部眼内血管瘤,5例(7.4%)为神经纤维瘤,4例(5.9%)为多发性神经纤维瘤,2例(2.9%)为神经瘤, 5例(7.4%)为多形性泪腺瘤(良性混合型细胞肿瘤)。结论:尽早住院检查,正确诊断和治疗可以避免并发症对患者视力甚至生命的威胁。

关键词：原发性眼内良性病变诊断

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Transient receptor potential channels and calcium dysregulation: a pathogenic duo in Parkinson's disease

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Neural Regeneration Research 2025年第3期20卷 808-810页

作者： Iqira saeed Linlin Ma Griffith Institute for Drug Discovery Griffith UniversityNathanBrisbaneQLDAustralia School of Environment and Science Griffith University NathanBrisbaneQLDAustralia

Parkinson's disease(PD) has a complex and multifactorial pathophysiology. Various studies, conducted both in pre-clinical models and PD patients, have reported a link between the disruption of calcium(Ca^(2+)) homeostasis and the subsequent development of PD. Ca^(2+) regulation is crucial for neuronal survival, differentiation,exocytosis at synapses,gene transcription,and proliferation.

关键词： homeostasis clinical subsequent

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An efficient technique to retrieve information from a damaged near-field communication tag

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International Journal of Intelligent Computing and Cybernetics 2017年第1期10卷 41-51页

作者： Dawer saeed Razi iqbal Al-Khawarizmi Institute of Computer Science University of Engineering and TechnologyLahoreLahorePakistan College of Computer Information Technology American University in the EmiratesDubaiUnited Arab Emirates

Purpose-The purpose of this paper is to discuss a technique of restoring data from a broken/damaged near-field communication(NFC)tag whose coil is damaged and seems ***/methodology/approach-This paper discusses a method to restore data from damaged NFC tags by designing a coil that matches the technical specification of NFC for restoring *** this paper,an NFC tag with a broken antenna coil and its operational NFC chip is used for restoring data by making an external loop antenna for the same ***-If the NFC tag is damaged,the information stored on the tag can be lost and can cause serious *** research provides an excellent mechanism for retrieving all the information accurately from a damaged NFC tag provided the NFC chip is not *** limitations/implications-One of the major limitations of this research is that the NFC chip remains intact without any *** can only be recoverable if just the antenna of the NFC tag is damaged;any damage to the NFC chip would make it impossible for the data to be *** implications-The research is carried out with limited resources in an academic institute and hence cannot be compared to antenna designs of the ***,industry vendors are using aluminum to design the coil;however,in this study a copper coil is used for coil design since it is far less expensive than aluminum ***/value-NFC is a rather new short-range wireless technology and not much work is done in this field as far as antenna study is *** study brings a technique to design a coil antenna for a damaged NFC tag to retrieve all the information without losing even a single bit of sensitive information.

关键词： Near-field communication Radio frequency identification Antenna design Mutual inductance Short-range wireless communication

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Unveiling the impact:COVID-19's influence on bacterial resistance in the Kingdom of Bahrain

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World Journal of Virology 2025年第1期14卷 83-98页

作者： Nermin K saeed Safiya K Almusawi Noor A Albalooshi Mohammed Al-Beltagi Medical Microbiology Section Department of PathologySalmaniya Medical ComplexGovernmental HospitalsManama 12Bahrain Medical Microbiology Section Department of PathologyRoyal College of Surgeons in Ireland-Medical University of BahrainBusaiteen 15503MuharraqBahrain Department of Paediatrics Faculty of MedicineTanta UniversityTanta 31511AlghrabiaEgypt Department of Pediatric University Medical CenterKing Abdulla Medical CityArabian Gulf UniversityManama 26671AlgharbiaBahrain

BACKGROUND Antibiotic resistance is a growing global health threat,and understanding local trends in bacterial isolates and their susceptibility patterns is crucial for effective infection control and antimicrobial *** coronavirus disease 2019(COVID-19)pandemic has introduced additional complexities,potentially influencing these *** To analyze trends in bacterial isolates and their antibiotic susceptibility patterns at Salmaniya Medical Complex from 2018 to 2023,with a specific focus on the impact of the COVID-19 pandemic on these *** A retrospective analysis of microbiological data was conducted,covering the period from 2018 to *** study included key bacterial pathogens such as Escherichia coli(***),Klebsiella pneumoniae,Acinetobacter baumannii,Pseudomonas aeruginosa,and Staphylococcus aureus,among *** antibiotic susceptibility profiles of these isolates were assessed using standard laboratory *** contextualize the findings,the findings were compared with similar studies from other regions,including China,India,Romania,Saudi Arabia,the United Arab Emirates,Malaysia,and United *** The study revealed fluctuating trends in the prevalence of bacterial isolates,with notable changes during the COVID-19 *** example,a significant increase in the prevalence of Staphylococcus aureus was observed during the pandemic years,while the prevalence of *** showed a more variable *** resistance rates varied among the different pathogens,with a concerning rise in resistance to commonly used antibiotics,particularly among Klebsiella pneumoniae and ***,the study identified an alarming increase in the prevalence of multidrug-resistant(MDR)strains,especially within Klebsiella pneumoniae and *** *** impact of the COVID-19 pandemic on these trends was evident,with shifts in the frequency,resistance patterns,and the emergence of MDR bacteria among several key ***

关键词： Multidrug-resistant organisms Antibiotic susceptibility COVID-19 pandemic Antimicrobial stewardship Bacterial isolates Salmaniya Medical Complex Bahrain

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棉花的突变育种

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核农学通报 1983年第2期 15-15页

作者： M. saeed iqbal Khan 王子田

巴基斯坦的棉花不但提供棉绒,而且提供食用油。种植的品种都长得高、丛生,产量比较低。1969—1970年开始了突变育种工作。从美国、苏联、土耳其、伊朗得到了21个品种的种子。在辐照“Stoneville”种子中,分离出三个突变体St-3、M-555和M... 详细信息

巴基斯坦的棉花不但提供棉绒,而且提供食用油。种植的品种都长得高、丛生,产量比较低。1969—1970年开始了突变育种工作。从美国、苏联、土耳其、伊朗得到了21个品种的种子。在辐照“Stoneville”种子中,分离出三个突变体St-3、M-555和M-909,它们属中矮秆,株型好,结铃多,并在人工杂交育种计划中被利用。“St-3”突变体是在1972年经25kRγ射线辐照后选择出来的,它表现早熟,矮秆和抗高温,其试验总结列于表中。突变体株型紧凑,适宜密植。突变体90％表现自然落叶,有利于纤维的特性。由于吐絮和落叶的相对一致性,有利于机械收获,并应用于杂交育种。

关键词：突变体 St 株型射线辐照矮秆种子突变型繁殖器官诱变育种突变育种

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C–H Arylation using acyl thiourea ligands: Applications in the synthesis of 3,6-diaryl-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles

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Chinese Chemical Letters 2016年第1期27卷 37-40页

作者： Aamer saeed Pervaiz Ali Channar Qasir iqbal Jamaluddin Mahar Department of Chemistry Quaid-i-Azam University

Synthesis of a series of new 3,6-diaryl-[1,2,4]triazolo[3,4-b] [1,3,4]thiadiazoles（5a-o） was achieved by phophine free, C-H arylative cross-coupling of 6-aryl-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles（4a-o）with suitably substituted iodoanilines using 1-（2-naphthoyl）-3-（4-bromophenyl）thiourea as a *** requisite triazolothiadiazoles（4a-o） were obtained by the condensation of 4-amino-1,2,4-triazole-3-thiol（3） with suitably substituted aromatic acids in the presence of phosphoryl chloride.

关键词： Triazolo[3,4-b]thiadiazoles Acyl thiourea C-H arylative coupling N,N-Dimethylacetamide

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