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Nafion/Thionine/Platinum Nanowires-Modified Electrode For Electrocatalyzing Glucose, Yu-Ping Lin, You-Xiu Lin, Qian Zhou, Dian-Ping Tang

Journal of Electrochemistry

A new amperometric biosensor based on Nafion, thionine and latinum nanowires was developed for sensitive detection of glucose. Initially, positively charged thionine molecules were immobilized onto the surface of Nafion-modified glassy carbon electrode through the interaction between -SO₃^- and -NH₃⁺, and glucose oxidase was then assembled on the modified electrode by using platinum nanowires as the cross-linkage. The preparation process was characterized by using cyclic voltammetry. Two enzymatic biosensors modified with and without platinum nanowires were used for the detection of glucose, and the improved analytical properties were obtained with platinum nanowires. Experimental results indicated …

St. Francis Of Assisi Catholic Church And Center For The Deaf Sunday Bulletin, December 28, 2014

Saint Francis of Assisi Catholic Church and Center for the Deaf Sunday Bulletin

A newsletter published for Deaf Catholics in Landover Hills, MD

St. Francis of Assisi Catholic Church and Center for the Deaf Sunday Bulletin Finding Aid

Kinetics And Mechanism Of Acidic Electroless Ni-P Plating, Zhi-Hui Xie, Gang Yu

Journal of Electrochemistry

Electrochemical behaviors of electroless nickel (EN) plating in three systems, namely, cathodic, anodic and complete bath solutions were investigated by polarization methods. The curves in the complete baths were not entirely consistent with those expected from a combination of the anodic and cathodic polarization curves, which implies that the anodic and cathodic reactions of the EN plating are interdependent. The effects of concentration of nickel ions, hypophosphite and pH on the polarization parameter and deposition rate in a complete bath were also discussed and compared by performing electrochemical and gravimetrical measurements. Based on these variations in the deposition potential and …

Synthesis Of Namnpo4 By Spraying Drying-High Temperature Sintering And Its Electrochemical Performance, Xiao-Chen Lin, Xiao-Biao Wu, Xu Hou, Yong Yang

Journal of Electrochemistry

As a cathode material for sodium ion batteries, NaMnPO₄/C nanocomposite is successfully synthesized by the combination of spraying drying and high temperature sintering methods. The crystal structure of the as-synthesized phosphate material is confirmed as the natrophilite NaMnPO₄, which possesses orthorhombic symmetry and Pmnb space group. It is shown that the precursors are hollow spherical particles and the obtained product consists of micro-scaled secondary particles, which are composed of NaMnPO₄ nanocrystallites (tens of nanometres) and amorphous carbon networks. The ionic and electronic conductivities of NaMnPO₄ are both effectively enhanced with the help of this …

Merle Gross Salerno Edelstein, Merle Edelstein, Kelsey Duinkerken

First Women at Jefferson Oral Histories

Dr. Edelstein is a psychiatrist and psychoanalyst who works with children, adolescents, and adults. After graduating from Jefferson Medical College in 1965 with the first class of women, she completed her internship at Bryn Mawr and did her residency training in Psychiatry at Hahneman University Hospital and Albert Einstein Medical Center. She did her analytic training at the Philadelphia Association for Psychoanalysis.

One-Step Synthesis Of Pani/Nihcf Hybrid Film Using Unipolar Pulse Electrodeposition And Its Electrocatalytic Reduction Performance For H2O2 Detection, Sen-Liang Liao, Xiu-Min Li, Xiao-Gang Hao, Yan-Hong Wang, Chun-Feng Xue, Yong-Hong Wang

Journal of Electrochemistry

Organic–inorganic hybrid films composed of polyaniline/nickel hexacyanoferrate (PANI/NiHCF) were fabricated on platinum substrates using unipolar pulse one-step electrodeposition. The deposition mechanism of hybrid film was proposed: Due to high potential of unipolar pulse electrodeposition, which avoided the reduction of Fe(CN)₆^3-, the films with high electrocatalytic property and “insoluble” form of NiHCF were achieved. The morphology and composition of PANI/NiHCF hybrid film were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and Fourier transform infrared spectroscopy (FT-IR). The effect of pulse potential on the electrochemical performance of hybrid film was investigated in detail. Results showed that …

Electrochemical Applications Of Single-Walled Carbon Nanohorns, Su-Ping Li, Huai-Min Guan, Shu-Yun Zhu, Muhammad Rehan Hassan Shah Gilani, Saima Hanif, Guo-Bao Xu, Yue-Jin Tong

Journal of Electrochemistry

Single-wall carbon nanohorns (SWCNHs) have unique properties, such as a large specific surface area, good electrical conductivity and biocompatibility. It has been widely utilized in many fields. In the present review, the progress in electrochemistry study of SWCNHs has been summarized and the future research trends have been proposed.

Electrochemiluminescence Imaging Focusing: Array Analysis And Visualization Of Latent Fingerprints, Zhen-Yu Zhou, Lin-Ru Xu, Bin Su

Journal of Electrochemistry

Electrochemiluminescence (ECL) imaging, as a novel and powerful analytical method, possesses many distinct advantages, including simplicity, high controllability, high-throughput and visualization. In recent years, it has been used in developing portable and miniaturized ECL sensor, and made remarkable achievements. In this review, the progress of ECL imaging, focusing on array analysis and visualization of latent fingerprints, has been introduced briefly based on our recent investigations and an attempt has been made to propose the future research trend.

Direct Electrochemistry And Glucose Biosensing Of Glucose Oxidase-Gold Nanoparticles Composite Synthesized By Enzyme Method, Fang He, Xiao-Li Qin, Ying-Chun Fu, Chao Chen, Qing-Ji Xie, Shou-Zhuo Yao

Journal of Electrochemistry

Glucose oxidase (GOx)-gold nanoparticles (AuNPs) composite was synthesized by the one-pot enzyme reaction in the mixture solution of NaAuCl₄, GOx and glucose, and a Nafion/GOx-AuNPs/glassy carbon electrode was fabricated by the cast-coating method to examine the direct electrochemistry of GOx and the biosensing performance on this electrode. Such a GOx-AuNPs composite showed good direct-electrochemistry activity and bioactivity of GOx, probably because the enzyme-mediated AuNPs are close to the redox active centers of GOx. This enzyme electrode exhibited a linear amperometric response to glucose concentration (0.54 mmol·L^-1) at -0.4 V (vs. SCE), and a detection limit of …

Preparation Of Surface Molecularly Imprinted Magnetic Nanoparticles For Hemoglobin Sensing, Chun-Fang Huang, Gui-Hong Yao, Jian-Ding Qiu

Journal of Electrochemistry

Surface molecularly imprinted magnetic nanoparticles (NPs) were prepared by employing dopamine (DA) as a functional monomer, hemoglobin (Hb) as a template, H₂PtCl₆ as an oxidant triggered DA polymerization on the surface of the Fe₃O₄ NPs. The Hb and the formed platinum nanoparticles (PtNPs) were embedded into the polydopamine (PDA). After removal of the Hb, the surface molecularly imprinted magnetic nanoparticles (imprinted Fe₃O₄/PDA-PtNPs) were formed, and then simply immobilized on the magnetic glassy carbon electrode (imprinted Fe₃O₄/PDA-PtNPs/MGCE) for Hb sensing. The imprinted Fe₃O₄/PDA-PtNPs …

Enzyme-Based Dna Electrochemical Biosensors: Recent Trends, Chun-Shui Lin, Yi-Ru Wang, Xi Chen

Journal of Electrochemistry

DNA electrochemical sensors have greatly promoted the development of biosensors for their high sensitivity, good selectivity, short analysis time and low cost. To further improve the detection sensitivity and selectivity, protein enzymes, functional nucleic acid enzymes etc. are often used due to the advantages of high catalytic efficiency and specificity. This review demonstrates the research progress of electrochemical sensors based on enzymatic amplification and analyses some existing problems of electrochemical sensors.

Resolve Mono-Electronic Process In The Voltammetric Behaviors Of Multi-Redox Bis-Coenzyme Q0, Hao Zhou, Yi-Tao Long

Journal of Electrochemistry

A widely held concept in electrochemistry is that truly elementary electron-transfer reactions always involve the exchange of one electron, therefore, an overall process involving a change of n electrons must involve n distinct electron-transfer steps. It is highly desirable to resolve multiple-step electron transfer reactions into each electron transfer step. The electrochemical behaviors of coenzyme Q₀ and methylene-bridged Bis-coenzyme Q₀ were investigated by cyclic voltammetry and square wave voltammetry in nonaqueous dichloromethane containing 0.15 mol·L^-1 Bu₄NClO₄ as the supporting electrolyte. The redox reaction of coenzyme Q₀ is well described as two chemically reversible …

Density Functional Theory Study On The Structures Of Solvent-Ion In The Electrolyte Of Lithium Ion Battery, Li-Dan Xing, Ru Yang, Xian-Wen Tang, Wen-Na Huang, Qi-Feng Liu, Qi-Peng Yu, Wei-Shan Li

Journal of Electrochemistry

In this work, the possible structures of solvent-ion complex, resulting from the electrostatic interaction in the propylene carbonate (PC) base electrolyte of lithium ion battery, have been investigated using the density functional theory. The calculated results show that the structure of solvent-ion complex depends on the solvent number. In the PC base electrolyte, maximum number of PC solvents that coexist in the Li⁺-solvent sheath is four. Additionally, the salt anion exists in a complex with the positively charged alkyl group of PC rather than in a free state. The calculated results give a good explanation to the reported …

The Combined Effects Of Tai Chi, Resistance Training, And Diet On Physical Function And Body Composition In Obese Older Women, S. A. Maris, D. Quintanilla, A. Taetzsch, A. Picard, J. Letendre, L. Mahler, Ingrid E. Lofgren, Furong Xu, M. J. Delmonico

Kinesiology Faculty Publications

Obesity is a major health problem in the USA, especially in minority populations over the age of 60 years, and the aging process can cause adverse effects on physical function. Previous research has shown that Tai Chi, resistance training (RT), and diet result in overall health improvements.However, the combination of these specific interventions has yet to be translated to obese olderwomen in an urban setting.The purpose of this studywas to examine a combined intervention on the primary outcomes of physical function and body composition. Using a nonrandomized design, 26 obese women (65.2 ± 8.1 years) completed a 12-week intervention; participants …

5 Um Professors Who Made News In 2014, Michael Newsom

University of Mississippi News

No abstract provided.

Force Chains As The Link Between Particle And Bulk Friction Angles In Granular Material, Adam M. Booth, Ryan Hurley, Michael P. Lamb, José E. Andrade

Geology Faculty Publications and Presentations

From sediment transport in rivers to landslides, predictions of granular motion rely on a Mohr-Coulomb failure criterion parameterized by a friction angle. Measured friction angles are generally large for single grains, smaller for large numbers of grains, and no theory exists for intermediate numbers of grains. We propose that a continuum of friction angles exists between single-grain and bulk friction angles due to grain-to-grain force chains. Physical experiments, probabilistic modeling, and discrete element modeling demonstrate that friction angles decrease by up to 15° as the number of potentially mobile grains increases from 1 to ~20. Decreased stability occurs as longer …

Vascular Cognitive Impairment In Ischemic Stroke Patients, Salman Isa Haza, Nawfal Madhi Sheaheed, Akram M. Al-Mahdawi

Iraqi Postgraduate Medical Journal

ABSTRACT: BACKGROUND: Stroke is associated with considerable physical and psychological impairment. Cognitive impairment is common sequel of stroke and small vessel ischemic disease. Potentially modifiable risk factors for vascular cognitive impairment (VCI) include hypertension, DM, hyperlipidemia and others. Because of the close association of these factors with stroke, prevention of VCI is largely tied to control of stroke risk factors. OBJECTIVE: The main aims of the study were to ascertain the significant determinants of cognitive impairment in stroke patients and the associated risk factors. PATIENTS AND METHODS: This is a case series descriptive study that enrolled 100 patients whose ages …

Unipolar Versus Bipolar Hip Hemiarthroplasty In The Treatment Of Femoral Neck Fractures In The Elderly, Ali A. Ali, Saad M. Rashed, Mushtaq T. Hussien

Iraqi Postgraduate Medical Journal

ABSTRACT: BACKGROUND: Hip fractures are associated with high morbidity and mortality, which require a treatment plan that ensures a good outcome with minimal complications. Different treatment modalities and arthroplasty prosthesis are available and widely used. OBJECTIVE: The aim of this study was to compare the short outcome of surgical treatment of femoral neck fractures in elderly using unipolar and bipolar hip hemiarthroplasty. PATIENTS AND METHODS: Thirty four patients with intracapsular femoral neck fractures ranging from Garden’s class II to class IV were enrolled in the study for surgical intervention using either unipolar hemiarthroplasty (Group A: 14females, 6 males) or bipolar …

Managements Of Type 2 Tibial Hemimelia; Short Review On Treatment Of Tibial Defects And The Results Of Four Patient Treated Using A Modified Brown Procedure, Mohammed H. Salal, Isam H.Ali

Iraqi Postgraduate Medical Journal

ABSTRUCT: BACKGROUND: Tibial hemimelia is a very rare deformity and problematic syndrome usually associated with variable visceral and skeletal deformities. The treatment is always difficult and challenging. Amputation was the preferred treatment option specially in complete tibial absence, however, a conservative management sometimes used in other types of the deformity or in cases of amputation refusal. OBJECTIVE: To review the methods of management of chronic tibial defects and to study the results of operative treatment of 4 patients with type ii congenital tibial hemimelia. PATIENT AND METHOD: All along thirty-two months period and after a proper clinical and radiological assessment …

Treatment Of Mallet Finger; Conservative Or Operative, Alaa A. Dawood

Iraqi Postgraduate Medical Journal

ABSTRACT: BACKGROUND: Mallet finger injuries, still represent a controversy as the best way of treatment, when to treat conservatively and when to go for surgical management . OBJECTIVE: This prospective study was undertaken to evaluate functional outcome of conservative versus surgical treatment of acute and chronic mallet finger injuries. PATIENTS AND METHODS: A prospective study was conducted between November 2011 and December 2013 . Forty six patients with mallet finger deformity were treated,21 by non-operative technique and 20 were treated surgically, the time between injury and commencement of treatment ranges from 3 days to 3 years mean ( 17 weeks).Follow …

Surgical Difficulties Of Cochlear Implantation In Children, Muhamed Dheia Ahmed, Muthana Saleemabdalamer

Iraqi Postgraduate Medical Journal

ABSTRACT: BACKGROUND: Cochlear implantation is a recent surgical treatment of deaf children, surgical difficulties may arise and has impact on outcome of implant. OBJECTIVE: To define the difficulties encountered during surgery and how the surgeon deals with them. METHODS: 120 patients of bilateral severe to profound hearing loss who all had implantation in the department of otorhinolaryngology, medical city, during the period from July 2010 to September 2011. All of them received the Nucleus Freedom cochlear implant with Contour Advance Electrode, model CI24RE. They are classified into two groups according to difficulty arises during surgery :(group a ) those identified …

How To Reduce Time Delays In Presentation And Treatment Of Testicular Torsion; The Role Of Public And Practitioners Education, Saad Dakhil Farhan Daraji

Iraqi Postgraduate Medical Journal

ABSTRACT: BACKGROUND: Testicular torsion (TT) requires prompt diagnosis and treatment to avoid testicular Loss. Most studies have focused on the ideal work up to rule TT out in cases of acute scrotum. A long response time to the scrotal pain was related to high orchidectomy rate during surgery for acute torsion. OBJECTIVE: We attempted here to highlight the causes behind high orchidectomy rate during the surgery for testicular torsion and the advices to decrease this problem. PATIENTS AND METHODS: Surgical exploration which was done for suspected testicular torsion in 50 consecutive males with their age (range 1-20 years. All patients …

Eamodynamic Changes During Airway Managment In Hypertensive Patients Undergoing Abdominoplasty Surgery, Ali Abdulhamed Mohamed, Abbas Mohamed Suhan

Iraqi Postgraduate Medical Journal

ABSTRACT: BACKGROUND: Avoidance of heamodynamic changes in hypertensive patients receiving general anesthesia is a goal including patients undergoing abdominoplasty surgery. OBJECTIVE: To compare haemodynamic responses to use of a classic laryngeal mask airway (LMA) versus endotracheal tube (ETT) in hypertensive females undergoing abdominoplasty surgery. PATIENT AND METHODS: Place and Duration of study: Al-Amaal private hospital from march. 2012 to march 2014. Fifty hypertensive female patient undergoing abdominoplasty surgery were randomly distrusted into two equal groups using alternate patient technique endotracheal tube( ETT ) and laryngeal mask airway (LMA) ( n=25 each). Patients in both groups were received general anaesthesia using …

The Clinical Presentation Of Hypertensive Crisis In The Emergency Department Of Baghdad Teaching Hospital, Manal Khudder Abdul Razak

Iraqi Postgraduate Medical Journal

ABSTRACT: BACKGROUND: Uncontrolled hypertension can progress to a hypertensive crisis defined as a systolic blood pressure ≥180 mm Hg or a diastolic blood pressure ≥120 mm Hg which is potentially fatal. It can manifest as either hypertensive emergency or urgency, depending on end-organ damage including cardiac, renal, retinal and neurologic injury. OBJECTIVE: To analyze the clinical presentation, and characteristics of patients presented with hypertensive crisis and to assess the frequency of the target organs involved. METHODS: An 8 months cross sectional study in which 306 patients older than 18 years who attended the medical emergency department of Baghdad Teaching Hospital …

Types ,Frequency,Clinical Presentation Of Congenital Central Nervous System Anomalies In Al- Kadmayhia Teaching Hospital, Lamyaa Abdul Kareem Hamoodi

Iraqi Postgraduate Medical Journal

ABSTRACT: BACKGROUND: The central nervous system (CNS)anomalies are the most severe, difficult to detect its etiology, and predict its clinical presentation and course. OBJECTIVE: To find out the common types of congenital malformations in central nervous system.,determine the frequency and the clinical features of these malformations. And to study the risk factors associated with congenital central nervous system malformations. PATIENTS AND METHODS: This cross-sectional study was performed at Al-Kadhimiyia Teaching Hospital (Neonatal care unit) from the 1st of January to the 1st of July, 2011. One hundred newborn infants were proved to have congenital abnormalities by physical examination alone. Fifty …

Evaluation Of Patients With Lymphadenopathy In Hematology Unit In Baghdad Teaching Hospital, Khudhair A Al-Khalissi, Wisam Sabah Budeir, Azher S Al-Zubaidy

Iraqi Postgraduate Medical Journal

ABSTRACT: BACKGROUND: Lymphadenopathy is defined as abnormality in the size or character of lymph nodes, is caused by the invasion or propagation of either inflammatory cells or neoplastic cells into the nodes. OBJECTIVE: To determine the etiological and clinical characteristics of Lymphadenopathy in adults. PATIENTS AND METHODS: Sixty patients with Lymphadenopathy attended Hematology department/Baghdad Teaching Hospital for the period between December 2011 and April 2012. Diagnostic procedures included clinical history and examination, complete blood count, lymph node, bone marrow studies and immunohistochemistry studies. RESULTS: Thirty six male and 24 female patients were included, with mean age of 36.2 ±16.3 years. …

The Clinical Significance Of Interleukin-15 And Interleukin -17 In Patients With Rheumatoid Arthritis, Noora Z Muhammed, Hassan J Hasony, Mubder A Mohamed Saeed

Iraqi Postgraduate Medical Journal

ABSTRACT: BACKGROUND: Rheumatoid arthritis (RA) is a chronic, deforming arthritis that can lead to disabilities and poor quality of life. Cytokines produced by inflammatory cells play a pivotal role in synovial inflammation and joint destruction in rheumatoid arthritis; they are the final mediators and/or regulators of inflammatory process. OBJECTIVE: This study was designed to assess serum IL-15 and IL-17 levels in a sample of patients with RA and to evaluate the correlation between their levels and various clinical, laboratory parameters of RA disease activity and severity. SUBJECTS AND METHODS: A case – control study was carried out from January 2013 …

A Review Of 277 Cases Of Patients With Chest Trauma In The Medical City Teaching Complex, Abdulameer Mohsin Hussein

Iraqi Postgraduate Medical Journal

ABSTRACT: BACKGROUND: Thoracic trauma is one of the leading causes of morbidity and mortality in developing countries. It represents 50% of all traumas. They are the cause of 25% of trauma deaths. OBJECTIVE: Describing the incidence, association with other injuries, understand the mechanism of common fatal injuries in chest trauma, diagnosis and operative morbidity and mortality. PATIENTS AND METHODS: A retrospective study of 277 patients, victims of chest trauma between August 2009 and August 2011 in Ghazi Al-hariri teaching surgical specialties hospital – Department of thoracic and vascular surgery/ medical city teaching complex. The records of all patients were reviewed …

Noetic Sanctification: Using Critical Thinking To Facilitate Sanctification Of The Mind, Bryce F. Hantla

Christian Perspectives in Education

This literature review proposes four pillars of critical thinking (CT) that should be applied as the Christian educational discipline of noetic (or cognitive) sanctification: 1) CT is a broad term involving multiple aspects of an approach to life, 2) education brings individuals out of the classroom and into developing CT dispositions, 3) CT necessitates being conversant with multiple perspectives throughout the process of thinking and learning, and 4) CT involves a high self-awareness regarding assumptions, biases, and motivation. Based on these CT pillars, some applications are recommended for Christian educators, regardless of educational setting.

Uniqueness And The Image Of God: A Theological And Philosophical Justification Of The Value Of Diversity, Mark S. Mcleod-Harrison

Christian Perspectives in Education

In Christian education, cultural diversity is valued. But what is the theological basis for that value? While our commonality as human persons is rooted in the image of God, what about the diversity of human beings and the cultural diversity flowing from it? This essays argues that although the image of God is common to us all, there is an account of the image of God that provides for uniqueness as well and that individual uniqueness is at the core of human being as we participate in our cultural forms of life.