Arbaz Samad, Rajeev Attam, José Jessurun, Stefan E. Pambuccian,
... of a pancreatic neuroendocrine tumor: A potential pitfall Arbaz Samad M.D., Arbaz Samad M.D. Department of Laboratory Medicine and ... lumc.eduSearch for more papers by this author Arbaz Samad M.D., Arbaz Samad M.D. Department of Laboratory Medicine and ...
Tópico(s): Amyloidosis: Diagnosis, Treatment, Outcomes
2013 - Wiley | Diagnostic Cytopathology
Thin films of GexSi1−xOy were prepared by reactive magnetron sputtering using simultaneous sputtering of silicon and germanium targets in an environment of oxygen and argon. Silicon and oxygen content were varied from 0 to 30 at. % separately and the effect of the addition of each element on electrical and optical properties of amorphous germanium was studied. The electrical and optical behavior of the compound with varying elemental composition is explained based on the oxidation behavior of the ...
Tópico(s): Thermal Radiation and Cooling Technologies
2003 - American Institute of Physics | Journal of Applied Physics
Hemma Resch, Doreen Schmidl, Anton Hommer, Florian Rensch, Jost B. Jonas, Gabriele Fuchsjäger‐Mayrl, Gerhard Garhöfer, Clemens Vass, Leopold Schmetterer,
... fundus camera-based system (Oculix 4000; Oculix Sarl, Arbaz, Switzerland). Retinal blood flow velocity was measured in ...
Tópico(s): Retinal Imaging and Analysis
2011 - Wiley | Acta Ophthalmologica
Andrea B. Conway, Shelly Cook, Arbaz Samad, Rajeev Attam, Stefan E. Pambuccian,
Intrapancreatic and intraabdominal accessory spleens (IPIASs) are rarely encountered in endoscopic ultrasound‐guided fine‐needle aspiration (EUS‐FNA) biopsies. However, as incidentally discovered IPIAS can mimic a benign or malignant pancreatic neoplasm on imaging studies, a definitive diagnosis made by EUS‐FNA can avert an unnecessary surgical intervention or additional radiologic follow‐up. We report five cases of intrapancreatic splenules and one case of accessory spleen (AS) in which a definitive ...
Tópico(s): Pancreatic and Hepatic Oncology Research
2011 - Wiley | Diagnostic Cytopathology
Alesia Kaplan, Arbaz Samad, Michelle Dolan, Adina Cioc, Carol Holman, Stephen C. Schmechel, Stefan E. Pambuccian,
Lymphomas showing both MYC/8q24 rearrangement and IGH@BCL2/t(14;18)(q32;q21), also referred to as “double‐hit” or “dual‐hit” lymphomas (DHL) are rare B‐cell malignancies with a germinal center B‐cell immunophenotype and heterogeneous cytologic and histologic features. Such lymphomas may arise de novo or through transformation of follicular lymphomas and are classified either as “B‐cell lymphoma, unclassifiable, with features intermediate between diffuse large B‐cell lymphoma (DLBCL) and Burkitt lymphoma ( ...
Tópico(s): Viral-associated cancers and disorders
2012 - Wiley | Diagnostic Cytopathology
Arbaz Samad, Alesia Kaplan, Mustafa A. Arain, Rajeev Attam, José Jessurun, J. Carlos Manivel, Stefan E. Pambuccian,
Endoscopic ultrasound‐guided fine‐needle aspiration (EUS‐FNA) allows a reliable and accurate diagnosis of neoplasms of the gallbladder and bile ducts. We report the cytopathologic findings of a case of large cell neuroendocrine carcinoma (LCNEC) of the gallbladder and extrahepatic bile ducts in a 67‐year‐old woman who presented with progressive abdominal pain and jaundice. EUS‐FNA of the mass involving the common bile duct and of a porta hepatis lymph node showed abundant cellularity with tumor cells ...
Tópico(s): Gestational Trophoblastic Disease Studies
2012 - Wiley | Diagnostic Cytopathology
Arbaz Samad, Akeesha A. Shah, Edward B. Stelow, Mariam Alsharif, Stuart E. H. Cameron, Stefan E. Pambuccian,
BACKGROUND Solid pseudopapillary neoplasm (SPPN) is a rare tumor of unknown origin that occurs predominantly in the body or tail of the pancreas in young women. The authors recently identified cercariform (Greek: tailed) cells, similar to those described in urothelial carcinomas, as a consistent cytologic feature in ultrasound‐guided fine‐needle aspiration (EUS‐FNA) samples from SPPNs. The objective of the current multi‐institutional study was to define the value of these cells in the differential ...
Tópico(s): Pancreatitis Pathology and Treatment
2012 - Wiley | Cancer Cytopathology
Physical defects that compromise appearance or function, which prevents an individual from leading a normal life, usually prompt the individual to seek treatment that will reinstate acceptable normalcy. Throughout history, the human eye has been mentioned by authors as the most precious of gifts. It unveils the entire outer world to our consciousness, gives life, expression, and dignity to the face. The loss of an eye, therefore, has always been regarded as the greatest misfortune and requires early ...
Tópico(s): Facial Trauma and Fracture Management
2012 - Cureus, Inc. | Cureus
A self-absorbing, self-supported microbolometer was fabricated using CMOS compatible surface micromachining technology. A high resistivity a-Ge/sub x/Si/sub 1-x/O/sub y/ resistor layer was suspended using an electrically conductive nichrome link. Prototype device fabrication and characterization indicates these devices may be suitable for application to commercial thermal imaging cameras. Detectivity of 6.7/spl times/10/sup 8/cm/spl radic/Hz/W, responsivity of 1/spl times/10/sup 5/ V/W, and thermal ...
Tópico(s): Superconducting and THz Device Technology
2005 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Electron Devices
The AES and ECC are the best two algorithms of symmetric encryption technology and asymmetric encryption technology.The paper presents a hybrid model which uses a combination of two symmetric algorithms enhanced AES and Blowfish for data confidentiality, Message Digest-5 for data integrity, Elliptic Curve Diffie Hellman algorithm-ECDHA for key exchange and Elliptic Curve Digital signature algorithm-ECDSA is used for digital signature.AES is enhanced by modifying the S-boxes columns, and then combination ...
Tópico(s): Cryptographic Implementations and Security
2014 - International Organization Of Scientific Research (IOSR) | IOSR Journal of Computer Engineering
Pardeep Kumar, Arbaz Khan, Debabrata Goswami,
Our experimental study shows that in the case of strongly absorbing samples, the time resolved thermal lens (TL) signal has a distinctive new feature. Existing TL models that are only based on heat conduction cannot explain this behavior. We have therefore developed a more comprehensive model that can also explain this additional feature in the TL of strongly absorbing samples. Our model is also capable of explaining our experimental results that show how the molecular size affects the molecular ...
Tópico(s): Thermal properties of materials
2014 - Elsevier BV | Chemical Physics
Arbaz Sajjad, SamiaSubhani Sajjad, Nadeem Husain, AhmedMaashi Al-Enezi,
Aim: The purpose of this retrospective study was to determine the prevalence of hypodontia and to ascertain the need of interdisciplinary treatment for ensuing esthetic and functional problems in a target population of Al-Jouf Province, Saudi Arabia. Subjects and Methods: Using a dental administration software tool, a total of 1267 patients who presented to the outpatient clinics of the Orthodontic and Prosthodontic Departments between March 2015 and January 2016 were identified. Of those, 694 were ...
Tópico(s): Cleft Lip and Palate Research
2016 - Medknow | Contemporary Clinical Dentistry
WanZaripah Wan Bakar, Arbaz Sajjad, Dasmawati Mohamad, TP Kannan,
Glass ionomer cements (GIC) were first introduced to dentistry in the late 1960s and since have proven to be useful in various areas of dental science, particularly restorative dentistry. As an aqueous polyelectrolyte system, GICs are known for their relative ease of use, chemical bond to the tooth, fluoride release and recharge, low coefficient of thermal expansion, and acceptable esthetic quality. However, clinical usage of GICs is still limited due to their relatively inferior mechanical properties ...
Tópico(s): Injection Molding Process and Properties
2018 - Medknow | Journal of international oral health
Arbaz Khan, C.S. Upadhyay, Marc Gerritsma,
In this paper, an h∕p spectral element method with least-square formulation for parabolic interface problem will be presented. The regularity result of the parabolic interface problem is proven for non-homogeneous interface data. The differentiability estimates and the main stability estimate theorem, using non-conforming spectral element functions, are proven. Error estimates are derived for h and p versions of the proposed method. Specific numerical examples are given to validate the theory.
Tópico(s): Numerical methods in engineering
2018 - Elsevier BV | Computer Methods in Applied Mechanics and Engineering
This paper is devoted to studying the Arnold--Winther mixed finite element method for two-dimensional Stokes eigenvalue problems using the stress-velocity formulation. A priori error estimates for the eigenvalue and eigenfunction errors are presented. To improve the approximation for both eigenvalues and eigenfunctions, we propose a local postprocessing. With the help of the local postprocessing, we derive a reliable a posteriori error estimator which is shown to be empirically efficient. We confirm ...
Tópico(s): Numerical methods in engineering
2018 - Society for Industrial and Applied Mathematics | SIAM Journal on Scientific Computing
Arbaz Sajjad, Wan ZW Bakar, Shahnor Basri, Siti NS Jamaludin,
Background: Functionally graded material (FGM) is a smart configuration for designing composite materials to improve their long-term endurance.The main characteristic of an FGM is the gradual variation in composition and microstructure across its dimensions, resulting in enhanced properties.This approach has been applied in several fields of thermal barrier coatings, power industry, biomechanical, automotive, aerospace, mechanical, civil, nuclear, aeronautic, and naval engineering.Aim: This article ...
Tópico(s): Silk-based biomaterials and applications
2018 - | World Journal of Dentistry
Monish Arbaz Ansari, Dhananjay Yadav, Sonam Soni, Abhijeet Srivastava, Maya Shankar Singh,
An efficient protocol for visible-light-mediated synthesis of a specific class of 1,2,4-dithiazolidines from β-ketothioamides is devised employing eosin Y as a photoinitiator at ambient temperature in an open pot. The reaction proceeds via an in situ-generated thiyl radical followed by dimerization/deaminative cyclization cascade, enabling the creation of a dithiazolidine ring through successive formation of S–S and N–C bonds under metal- and additive-free conditions. Remarkably, the benign conditions, ...
Tópico(s): Catalytic C–H Functionalization Methods
2019 - American Chemical Society | The Journal of Organic Chemistry
Ruchi Singh, Mohammed Arbaz, Nirendra Kumar, Rajnish Joshi,
Diabetic autonomic neuropathy (DAN) is a common and disabling complication of diabetes, with cardiac autonomic neuropathy (CAN) being a major cause of mortality and morbidity. Standard autonomic function tests (AFT) are cumbersome and time consuming to conduct in OPD setting.To evaluate the diagnostic accuracy of composite autonomic symptom scale 31 (COMPASS-31) as a screening test for DAN.A cross-sectional study which enrolled 60 type 2 diabetes individuals was conducted at a tertiary care center. ...
Tópico(s): Parkinson's Disease Mechanisms and Treatments
2019 - Dove Medical Press | Diabetes Metabolic Syndrome and Obesity
Joshua L. Golubovsky, Arbaz Momin, Nicolas R. Thompson, Michael P. Steinmetz,
Bertolotti syndrome is a rare spinal condition that causes low-back pain due to a lumbosacral transitional vertebra (LSTV), which is a pseudoarticulation between the fifth lumbar transverse process and the sacral ala. Bertolotti syndrome patients are rarely studied, particularly with regard to their quality of life. This study aimed to examine the quality of life and prior treatments in patients with Bertolotti syndrome at first presentation to the authors' center in comparison with those with lumbosacral ...
Tópico(s): Pelvic and Acetabular Injuries
2019 - | Journal of Neurosurgery Spine
Arbaz Sajjad, Wan Zaripah Wan Bakar, Dasmawati Mohamad, Thirumulu Ponnuraj Kannan,
In restorative dentistry, there has been a growing shift towards using nanoparticles dispersed in the polymer matrix to improve properties of dental restorative materials. A new nano zirconia–silica–hydroxyapatite (nanoZrO 2 –SiO 2 –HA) was synthesized by one-pot synthesis and characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray (EDX) and dot mapping. The effect of addition of nanoZrO 2 –SiO ...
Tópico(s): Dental Implant Techniques and Outcomes
2019 - AIMS Press | AIMS Materials Science
Monish Arbaz Ansari, Dhananjay Yadav, Sonam Soni, Maya Shankar Singh,
Phosphonium ylides are being reported here as a catalyst for the formation of thiazolidines and 1,3-thiazinanes from β-ketothioamides (which act as a three atom N, C, and S synthon) with dihaloalkanes via [3 + 2] and [3 + 3] annulations under metal-free conditions. An N,C,S-centred chemoselective dihaloalkane-controlled cascade process has been identified for the preparation of cyclic N,S-heterocycles (thiazolidines and 1,3-thiazinanes) from identical β-ketothioamides. The reaction proceeds via consecutive ...
Tópico(s): Synthesis of heterocyclic compounds
2019 - Royal Society of Chemistry | Organic & Biomolecular Chemistry
Monish Arbaz Ansari, Dhananjay Yadav, Maya Shankar Singh,
A photocatalyst- and additive-free, visible-light-mediated chemoselective domino protocol was devised to access fully substituted thiazoline derivatives from β-ketothioamides and α-diazo 1,3-diketones at moderate temperature in open air. The reaction proceeds through in situ generation of electrophilic carbenes from α-diazo 1,3-diketones by a low-energy blue LED (448 nm), which undergoes selective coupling with nucleophilic β-ketothioamides to give thiazolines by successive formation of C-S and C- ...
Tópico(s): Catalytic C–H Functionalization Methods
2020 - Wiley | Chemistry - A European Journal
Tyler J. Alban, Defne Bayık, Balint Otvos, Anja Rabljenovic, Lin Leng, Jia-Shiun Leu, Gustavo Roversi, Adam Lauko, Arbaz Momin, Alireza M. Mohammadi, David M. Peereboom, Manmeet S. Ahluwalia, Kazuko Matsuda, Kyuson Yun, Richard Bucala, Michael A. Vogelbaum, Justin D. Lathia,
The application of tumor immunotherapy to glioblastoma (GBM) is limited by an unprecedented degree of immune suppression due to factors that include high numbers of immune suppressive myeloid cells, the blood brain barrier, and T cell sequestration to the bone marrow. We previously identified an increase in immune suppressive myeloid-derived suppressor cells (MDSCs) in GBM patients, which correlated with poor prognosis and was dependent on macrophage migration inhibitory factor (MIF). Here we examine ...
Tópico(s): Immune cells in cancer
2020 - Frontiers Media | Frontiers in Immunology
Sonam Soni, Pragya Pali, Monish Arbaz Ansari, Maya Shankar Singh,
A metal- and oxidant-free photoinduced strategy for thioxo sulfur-selective trifluoromethylation of β-ketodithioesters at room temperature is reported. Excellent Z/E-stereoselectivity has been achieved with cheap and viable Langlois' reagent (CF3SO2Na, sodium triflinate) in the presence of eosin Y, which acts as a hydrogen atom transfer (HAT) catalyst. The reaction proceeds via disulfide intermediate disulfanediylbis(3-(alkylthio)-1-phenylprop-2-en-1-one) (a dimer of β-ketodithioester) followed by ...
Tópico(s): Inorganic Fluorides and Related Compounds
2020 - American Chemical Society | The Journal of Organic Chemistry
Pranay Soni, Mark A. Davison, Jianning Shao, Arbaz Momin, Diana Lopez, Lilyana Angelov, Gene H. Barnett, Joung H. Lee, Alireza M. Mohammadi, Varun R. Kshettry, Pablo F. Recinos,
Tópico(s): Cerebral Venous Sinus Thrombosis
2020 - Springer Science+Business Media | Journal of Neuro-Oncology
S. Chandra Sekhar, Bhimanaboina Ramulu, D. Narsimulu, Shaik Junied Arbaz, Jae Su Yu,
Abstract Metal–organic frameworks (MOFs) are promising materials in diverse fields because of their constructive traits of varied structural topologies, high porosity, and high surface area. MOFs are also an ideal precursor/template to derive porous and functional morphologies. Herein, Co 3 V 2 O 8 nanohexagonal prisms are grafted on CuV 2 O 6 nanorod arrays (CuV‐CoV)‐grown copper foam (CF) using solution‐processing methods, followed by thermal treatment. Direct preparation of active material on CF ...
Tópico(s): Advanced battery technologies research
2020 - Wiley | Small
Bhimanaboina Ramulu, S. Chandra Sekhar, Goli Nagaraju, Shaik Junied Arbaz, Jae Su Yu,
Mixed-metallic oxyphosphides and oxysulfides are prominent electrode candidates for energy storage devices owing to the synergistic benefits of metal oxides and metal sulfides. Herein, we explore nickel-molybdenum oxyphosphides and oxysulfides (NMOP/NMOS) by a one-step hydrothermal technique, followed by an anion exchange process. As a result, the materials consist of one-dimensional nanorods (1D NRs) which promote charge transportation. Both the materials with 1D NR morphology exhibit superior electrochemical ...
Tópico(s): Conducting polymers and applications
2020 - Elsevier BV | Journal of Power Sources
Monish Arbaz Ansari, Dhananjay Yadav, Maya Shankar Singh,
An operationally simple and efficient one-pot protocol for the synthesis of highly functionalized thiazolidin-4-ones and thiazolines has been devised via Rh(OAc)2-catalyzed annulative coupling of β-ketothioamides with diazo compounds under mild reaction conditions for the first time. This double functionalization of diazo compounds proceeds via selective S-alkylation followed by intramolecular N-cyclization enabling the formation of C-S and C-N bonds at moderate temperature. Notably, the products ...
Tópico(s): Sulfur-Based Synthesis Techniques
2020 - American Chemical Society | The Journal of Organic Chemistry
Arbaz Momin, Michael P. Steinmetz,
Spine surgery has evolved over centuries from first being practiced with Hippocratic boards and ladders to now being able to treat spinal pathologies with minimal tissue invasion. With the advent of new imaging and surgical technologies, spine surgeries can now be performed minimally invasively with smaller incisions, less blood loss, quicker return to daily activities, and increased visualization. Modern minimally invasive procedures include percutaneous pedicle screw fixation techniques and minimally ...
Tópico(s): Medical Imaging and Analysis
2020 - Elsevier BV | World Neurosurgery
S. Chandra Sekhar, Goli Nagaraju, Bhimanaboina Ramulu, Shaik Junied Arbaz, D. Narsimulu, Sk. Khaja Hussain, Jae Su Yu,
In recent years, a substantial advancement in flexible and wearable consumer electronics has expedited the research community to develop flexible, lightweight, and sophisticated energy storage systems via cost-effective and safe preparation methods. In this context, we propose a state-of-the-art hot-water therapy (HWT) method to trigger nickel-copper-cobalt layered double hydroxide nanosheets on flexible conductive fabric (Ni–Cu–Co LDH NSs/CF). In the proposed HWT method, de-ionized water plays a ...
Tópico(s): Conducting polymers and applications
2020 - Elsevier BV | Nano Energy