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Spindle Cell Carcinoma of the Maxilla: A Case Report of Rare Entity

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Surgical Science 2017年第5期8卷 220-227页

作者： Montasir Junaid Maliha Kazi Sadaf qadeer Department of Otorhinolaryngology-Head and Neck Surgery Jinnah Medical and Dental College Karachi Pakistan Department of Otorhinolaryngology-Head and Neck Surgery Royal Manchestor Infirmary Manchester UK Department of Otorhinolaryngology-Head and Neck Surgery Sir Syed College of Medical Sciences Karachi Pakistan

Spindle cell carcinoma also known as sarcomatoid carcinoma is a rare highly aggressive tumor which is histologically different from squamous cell ca and mesenchymal cancers. Only hands full of cases have been reported in literature since 1957 and hence no proper treatment protocol has been devised yet. We present such a case of thirty-four-year-old female who presented with spindle cell carcinoma of the maxilla at our department and was treated with extensive surgery followed by chemotherapy and radiation therapy. Spindle cell carcinoma is generally associated with poor prognosis and hence literature supports use of post operative Chemo and Radiotherapy for better result and decrease chance of local recurrence.

关键词： Spindle Cell Carcinoma Maxilla Maxillary Carcinoma

Assessment of heavy metals concentration in holothurians, sediments and water samples from coastal areas of Pakistan (Northern Arabian Sea)

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Journal of Coastal Life Medicine 2017年第5期5卷 191-201页

作者： Quratulan Ahmed qadeer Mohammad Ali Levent Bat The Marine Reference Collection and Resource Centre University of KarachiKarachi75270Pakistan Department of Hydrobiology Fisheries FacultySinop UniversityTR57000SinopTurkey

Objective: To determine heavy metal concentrations in holothurians (Holothuria arenicola, Holothuria pardalis, Holothuria verrucosa, Holothuria atra, Ohshimella ehrenbergii, Holothuria cinerascens, Stolus buccalis and Holothuria leucospilota), sediments and sea water samples from both Buleji and Sunehri coasts bordering Northern Arabian Sea during January to December 2014 and to assess the level of bioaccumulation using bioaccumulation factors. Methods: Fe, Mn, Zn, Cu, Cd and Pb levels were determined by Perkin Elmer AAnalyst 700 Atomic Absorption Spectrophotometer. Biota concentration factor (BCF) and biota sediment accumulation factor (BSAF) were also calculated. Results: The mean concentrations of heavy metals in body wall of sea cucumber ranged from 0.11 to 2.67, 0.43 to 8.93, 14 to 73, 0.76 to 7.12, 0.52 to 3.02 and 11 to 46 μg/g dry wright for Cd, Cu, Fe, Mn, Pb and Zn, respectively. The greatest biota-sediment bioaccumulation factor (BSAF) value for Zn (3.29) was observed in H. leucospilota at Buleji during pre-monsoon, indicating the species as microconcentrator. The BSAF values for Cd in sea cucumber ranged from 0.042 to 1.492. Conclusions: The results suggested that the studied sea cucumber species ranged from being microconcentrators to deconcentrators. The BSAF values of Cu, Fe, Mn and Pb were low, indicating the species as deconcentrators. Zn in all species from Sunehri coast is 'very bioaccumulative' (BCF > 5000) during all sampling periods. Cu, Fe, Mn and Pb can be considered 'bioaccumulative' (BCF < 5000).

关键词： Heavy metal Sea cucumber Karachi coast Northern Arabian Sea

Spider Silk Supercontraction‑Inspired Cotton‑Hydrogel Self‑Adapting Textiles

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Advanced Fiber Materials 2022年第6期4卷 1572-1583页

作者： Abdul qadeer Khan Kaiqing Yu Jiatian Li Xueqi Leng Meilin Wang Xuesong Zhang Baigang An Bin Fei Wei Wei Huichuan Zhuang Muhammad Shafiq Lili Bao Zunfeng Liu Xiang Zhou Department of Science China Pharmaceutical UniversityNanjing 211198China State Key Laboratory of Medicinal Chemical Biology College of Pharmacyand College of ChemistryKey Laboratory of Functional Polymer MaterialsFrontiers Science Center for New Organic MatterNankai UniversityTianjin 300071China School of Chemical Engineering University of Science and Technology LiaoningAnshan 114051China Institute of Textiles and Clothing The Hong Kong Polytechnic UniversityHong Kong 999077China Department of Cardiothoracic Surgery Jinling HospitalNanjing 210002China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano‑Biomaterials and Regenerative MedicineCollege of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai 201620PR China

Smart textiles are able to self-adapt to an irregular ***,they found new applications in intelligent clothes and equipments,where the properties and functionality of traditional polymeric fibers are insufficient,and hard to be *** by the supercontraction behavior of the spider silk,we prepared a spinnable hydrogel to form a sheath-core-like composite yarn,after being coated on cotton *** strong hydrogen bonding between the cotton yarn and the polar groups of the hydrogel provides an outstanding mechanical stability,and the twists insertion forms a spiral-like architecture,which exhibited moisture-responsive super contraction *** structural tailoring the chirality of the fiber twists and coiling extends into homo-chiral and heterochiral architectures,as displays contraction and expansion when is exposed to the *** the relative humidity is increased from 60 to 90%,a homochiral yarn exhibits 90%contraction,while a heterochiral yarn shows 450% expansion,and the maximum work capacity reached up to 6.1 J/*** super contracted yarn can be re-stretched to its original length manifesting cyclability,which can be exploited to build a smart textile,selfadaptive to irregular *** a strategy may be further extended to a wide variety of materials to achieve intelligent textiles from common fiber or yarns.

关键词： Supercontraction Yarns Actuator Moisture sensitive Biomimetic

Spatio-Temporal Population Density and Spatial Dynamic Spectrum Allocation

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Journal of Southwest Jiaotong University(English Edition) 2007年第4期15卷 277-287页

作者： Muhammad qadeer Sharif Reza Ghazizadeh 范平志 School of Information Science and Technology Southwest Jiaotong University

A realistic population density distribution scenario in conjunction with the spatial dynamic spectrum allocation （DSA） is taken into account to mitigate the spectrum wastage in terms of extra guard bands. For the insertion of the extra guard bands, an efficient strategy based on self-assessment is applied to each victim cell individually and independently. Consequently, it is no more required to spread the extra guard band over the whole DSA region. Simulation results StlOW an improvement of 3% -4% in percentage of satisfied users for Universal Mobile Telecommunications System （UMTS） network and 4%-5% for Digital Video Broadcasting Terrestrial （DVB-T） network.

关键词： dynamic spectrum allocation (DSA) spatial DSA spectrum sharing population density-distance

Quality of Life after Functional Endoscopic Sinus Surgery in Patients with Chronic Rhinosinusitis

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International Journal of Otolaryngology and Head & Neck Surgery 2018年第4期7卷 189-198页

作者： Sadaf qadeer Shabbir Akhtar Montasir Junaid Muhammad Sohail Halim Department of Otolaryngology-Head & Neck Surgery Sir Syed College of Medical Sciences Karachi Pakistan Department of Otolaryngology-Head & Neck Surgery Aga Khan University & Hospital Karachi Pakistan Department of Otolaryngology-Head & Neck Surgery Armed Forces Hospital Southern Region Khamis Mushayt KSA Stanford University Palo Alto USA

Chronic Rhinosinusitis (CRS) is a group of disorders characterized by the inflammation of mucosa of the nasal passages and paranasal sinuses. It includes chronic rhinosinusitis with polyps, CRS without polyps and Allergic Fungal Sinusitis (AFS). This debilitating disease causes negative impact on quality of life (QOL) of patients. Functional endoscopic sinus surgery (FESS) is the mainstay of surgical treatment for patients and improves QOL of patients. This subjective assessment of QOL can be measured by disease specific questionnaires. SNOT-22 questionnaire is widely used and validated questionnaire for this purpose. Prospective study was done on 54 patients. Data were collected using SNOT-22 questionnaire and filled in pre-operative period then in post-operative follow-up visits on 1st, 3rd, 6th and 12th months. Paired sample t-test was used to compare pre-operative and post-operative SNOT scores and multivariate generalized linear model was used to estimate regression parameters for SNOT scores in CRS with polyp and AFS in comparison of CRS without polyps. Out of 54 patients, 59.3% were males, mean age was 35.98, 29.6% were in CRS without polyp group, 44.4% and 25.9% were in CRS with polyps and AFS group. Recurrence occurred in 7.4%, revision surgery required in 3.7% while 22.2% had history of asthma. Paired sample t-test showed statistical significant reduction in post-operative SNOT scores. Linear model results showed SNOT scores in CRS with polyp group was significantly reduced. Thus FESS provides significant improvement in QOL of patients in chronic rhinosinusitis.

关键词： Quality of Life Chronic Rhinosinusitis Surgery

Surface Analysis of Etched Silicon

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Journal of Surface Engineered Materials and Advanced Technology 2014年第2期4卷 98-104页

作者： Arifullah qadeer Hussain Nazir A. Naz Ammar Akbar Akbar Ali Fedral Urdu University of Arts Science and Technology Islamabad Pakistan Nikon 6th Road Satllite Town Rawalpindi Pakistan Riphah International University Islamabad Pakistan Riphah International University Islamabad Pakistan Fedral Urdu University of Arts Science and Technology Islamabad Pakistan

P-type (100) oriented silicon wafers were etched with vapors of concentrated Hydrofluoric acid in a reaction chamber under continuous vapor-flow at standard temperature and pressure. The surface morphology of the etched samples was examined by scanning electron microscope and pore size analyzer. The radius of the pores and quantum dots were found to be 6 nm and 4 nm respectively. Etched samples emitted red luminescence when exposed to ultra violet (UV) light. The red luminescence emitted by the etched surface has been assigned to energy states induced by quantum confinement of holes.

关键词： Semiconductors PS SEM TG/DTA

On Power Allocation for Transmitter and Receiver Selection in MIMO Fading Channels

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通讯和计算机（中英文版） 2011年第6期8卷 483-489页

作者： Shaik qadeer Niranjan Kumar Harinath Reddy Mohammed Zafar Ali Khan Dept. of Electrical Engg M.J. College of Engg. Osmania University Hyderabad AP-500034 India IIIT Hyderabad AP-500008 India Dept. of Electrical Engg. HT Hyderabad AP -502205 India

Morphology modulation of artificial muscles by thermodynamic-twist coupling

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National Science Review 2023年第1期10卷 17-27页

作者： Xiaoyu Hu Jiatian Li Sitong Li Guanghao Zhang Run Wang Zhongsheng Liu Mengmeng Chen Wenqian He Kaiqing Yu Wenzhong Zhai Weiqiang Zhao Abdul qadeer Khan Shaoli Fang Ray H.Baughman Xiang Zhou Zunfeng Liu State Key Laboratory of Medicinal Chemical Biology College of Chemistry and College of Pharmacy Key Laboratory of Functional Polymer Materials Frontiers Science Center for New Organic MatterNankai University Alan G.Mac Diarmid Nano Tech Institute University of Texas at Dallas Department of Science China Pharmaceutical University

Human muscles can grow and change their length with body development;therefore,artificial muscles that modulate their morphology according to changing needs are *** this paper,we report a strategy to transform an artificial muscle into a new muscle with a different morphology by thermodynamic-twist coupling,and illustrate its structural evolution during *** muscle length can be continuously modulated over a large temperature range,and actuation occurs by continuously changing the *** strategy is applicable to different actuation modes,including tensile elongation,tensile contraction and torsional *** is realized by twist insertion into a fibre to produce torsional *** anne aling causes partial thermodynamic relaxation of the spiral molecular chains,which serves as internal tethering and inhibits fibre twist release,thus producing a self-supporting artificial muscle that actuates under *** a sufficiently high temperature,further relaxation of the spiral molecular chains occurs,resulting in a new mus cle with a different length.A structural study provides an understanding of the thermo dynamic-twist *** work provides a new design strategy for intelligent materials.

关键词： artificial muscle actuator twist functional fibres bio-mimetic thermodynamic-twist coupling smart materials

Structural Characteristics of Porous Silicon

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Journal of Surface Engineered Materials and Advanced Technology 2014年第2期4卷 105-110页

作者： qadeer Hussain Arifullah Nazir A. Naz Ammar Akbar Akbar Ali Fedral Urdu University of Arts Science and Technology Islamabad Pakistan Nikon 6th Road Satllite Town Rawalpindi Pakistan Ripha International University Islamabad Pakistan Ripha International University Islamabad Pakistan Fedral Urdu University of Arts Science and Technology Islamabad Pakistan

Silicon wafers (p-type) were etched under continuous flow of HF vapors in a reaction chamber at standard temperature and pressure. Etched surface of the silicon wafer was found emitting red luminescence when exposed to ultra violet (UV) light. XRD and Atomic Force Microscopy of the etched samples were carried out to study the surface of the etched silicon. It is noticed that etching has removed the stress induced atomic layers of silicon at grain boundaries and layer of porous silicon has been formed at the surface of silicon wafer which has higher inter planer distance than the silicon itself. The size of dots observed on the surface of etched silicon is of the order of few nm. The red emission from the surface of etched silicon appears to be due to the energy states induced by quantum confinement.

关键词： PS XRD Electron Confinement