Now showing items 71-90 of 100

    • Raman chemometric urinalysis (Rametrix) as a screen for bladder cancer 

      Huttanus, Herbert M.; Vu, Tommy; Guruli, Georgi; Tracey, Andrew; Carswell, William; Said, Neveen; Du, Pang; Parkinson, Bing G.; Orlando, Giuseppe; Robertson, John L.; Senger, Ryan S. (2020-08-21)
      Bladder cancer (BCA) is relatively common and potentially recurrent/progressive disease. It is also costly to detect, treat, and control. Definitive diagnosis is made by examination of urine sediment, imaging, direct ...
    • The Rametrix (TM) PRO Toolbox v1.0 for MATLAB (R) 

      Senger, Ryan S.; Robertson, John L. (2020-01-06)
      Background. Existing tools for chemometric analysis of vibrational spectroscopy data have enabled characterization of materials and biologicals by their broad molecular composition. The Rametrix (TM) LITE Toolbox v1.0 for ...
    • Ratio of dynamic moduli and estimation of relaxation times 

      Huang, J. H.; Baird, Donald G. (AIP Publishing, 2002-07-01)
      In this paper, the theoretical interrelation between the ratio of dynamic moduli and the number and distribution of relaxation times required to fit the generalized Maxwell model to the data was investigated. Theorems were ...
    • Reliable method for determination of the velocity of a sinker in a high-pressure falling body type viscometer 

      Dindar, C.; Kiran, E. (AIP Publishing, 2002-10-01)
      We present a new sensor configuration and data reduction process to improve the accuracy and reliability of determining the terminal velocity of a falling sinker in falling body type viscometers. This procedure is based ...
    • Rheological Properties Of Copolyester Liquid-Crystalline Melts .1. Capillary Rheometry 

      Jerman, R. E.; Baird, Donald G. (AIP Publishing, 1981)
      Rheological properties of two copolyesters which exhibit liquid crystalline behavior in the melt state were determined using an Instron capillary rheometer. The two polymer melts with nematic liquid crystalline order ...
    • Rheological Properties Of Liquid-Crystalline Copolyester Melts .2. Comparison Of Capillary And Rotary Rheometer Results 

      Gotsis, A. D.; Baird, Donald G. (AIP Publishing, 1985)
      In an earlier paper capillary rheometer results were presented for two liquid crystalline copolyesters consisting of 60 mole % and 80 mole % p_hydroxybenzoic acid (pHBA) and polyethyleneterephthalate (PET). In this paper ...
    • Rheological Properties Of Liquid-Crystalline Solutions Of Poly-P-Phenyleneterephthalamide in Sulfuric-Acid 

      Baird, Donald G. (AIP Publishing, 1980)
      The steady state shear and linear viscoelasticproperties of both isotropic and liquid crystalline solutions of the rigid chain polymer poly_p_phenyleneterephthalamide in sulfuric acid have been determined. Both the primary ...
    • Rheology of fluids measured by correlation force spectroscopy 

      Radiom, Milad; Robbins, Brian A.; Honig, Christopher D. F.; Walz, John Y.; Paul, Mark R.; Ducker, William A. (AIP Publishing, 2012-04-01)
      We describe a method, correlation force spectrometry (CFS), which characterizes fluids through measurement of the correlations between the thermally stimulated vibrations of two closely spaced micrometer-scale cantilevers ...
    • The role of nanoparticle size and ligand coverage in size focusing of colloidal metal nanoparticles 

      Mozaffari, Saeed; Li, Wenhui; Dixit, Mudit; Seifert, Soenke; Lee, Byeongdu; Kovarik, Libor; Mpourmpakis, Giannis; Karim, Ayman M. (2019-10-01)
      Controlling the size distribution of nanoparticles is important for many applications and typically involves the use of ligands during synthesis. In this study, we show that the mechanism of size focusing involves a ...
    • Role Of Solvent Nature on Rheological Properties Of Nylon 6,6 Solutions 

      Baird, Donald G. (AIP Publishing, 1981)
      The rheological properties of concentrated solutions of nylon 6,6 of various molecular weights in various solvents have been determined in steady shear flow. Four solvents including 90% formic acid,m_cresol, 97% H2SO4, and ...
    • Separating The Effects Of Sparse Long-Chain Branching on Rheology From Those Due To Molecular Weight in Polyethylenes 

      Doerpinghaus, P. J.; Baird, Donald G. (AIP Publishing, 2003-05-01)
      The effects of sparse (< 1 branch per chain) long-chain branching (LCB), molecular weight (MW), and molecular weight distribution on the shear rheological properties of commercial polyethylenes are often convoluted. In ...
    • Shear And Extensional Rheology Of Sparsely Branched Metallocene-Catalyzed Polyethylenes 

      Bin Wadud, S. E.; Baird, Donald G. (AIP Publishing, 2000-09-01)
      The purpose of this study was to identify any rheological effects that are consistent with the presence of sparse levels of long chain branching (LCB) in three commercial metallocene-catalyzed polyethylenes (MCPE) all of ...
    • Solid-like dynamics in ultrathin films of polymeric liquids 

      Singh, G.; Saraf, Ravi F.; Martin, Y. (AIP Publishing, 2003-12-01)
      In this letter, we demonstrate that, at mesoscales, nonferroelectric liquid films of poly(dimethyl siloxane) exhibit significant electrostriction not present in the corresponding bulk state. Remarkably, the observed ...
    • Spectral characteristics of urine specimens from healthy human volunteers analyzed using Raman chemometric urinalysis (Rametrix) 

      Senger, Ryan S.; Kavuru, Varun; Sullivan, Meaghan; Gouldin, Austin; Lundgren, Stephanie; Merrifield, Kristen; Steen, Caitlin; Baker, Emily; Vu, Tommy; Agnor, Ben; Martinez, Gabrielle; Coogan, Hannah; Carswell, William; Karageorge, Lampros; Dev, Devasmita; Du, Pang; Sklar, Allan; Orlando, Giuseppe; Pirkle, James, Jr.; Robertson, John L. (PLOS, 2019-09-27)
      Raman chemometric urinalysis (Rametrix™) was used to analyze 235 urine specimens from healthy individuals. The purpose of this study was to establish the “range of normal” for Raman spectra of urine specimens from healthy ...
    • Spontaneous planarization of nanoscale phase separated thin film 

      Saraf, Ravi F.; Niu, S.; Stumb, E. (AIP Publishing, 2002-06-01)
      Structure of complex fluid at mesoscales is influenced by interfacial effects. We describe the dynamic response in such films to sudden change in interfacial tension. In a self-assembled block copolymer film, the monolayer ...
    • Stereoselective photoredox ring-opening polymerization of O-carboxyanhydrides 

      Feng, Quanyou; Yang, Lei; Zhong, Yongliang; Guo, Dong; Liu, Guoliang; Xie, Linghai; Huang, Wei; Tong, Rong (Nature, 2018-04-19)
      Biodegradable polyesters with various tacticities have been synthesized by means of stereoselective ring-opening polymerization of racemic lactide and β-lactones but with limited side-chain groups. However, stereoselective ...
    • Studies on The Transient Shear-Flow Behavior Of Liquid-Crystalline Polymers 

      Viola, G. G.; Baird, Donald G. (AIP Publishing, 1986-06-01)
      An understanding of the flow behavior of liquid crystalline polymers (LCP's) is of immense practical value because of the potential to form high modulus materials from these polymers. These fluids exhibit a high degree of ...
    • Sub-Tg annealing studies of rubber-modified and unmodified epoxy systems 

      Ophir, Zohar H.; Emerson, John A.; Wilkes, Garth L. (American Institute of Physics, 1978)
      Epoxy network systems based on DGEBA (bisphenol_A_diglycidyl ether) and NMA (nadic methyl anhydride) systems modified with the low molecular weight CTBN (carboxyl_terminated butudiene_acrylonitrile copolymer)rubbers were ...
    • Sustainable Water through Innovation in Membranes & Materials (SWIMM) 

      Martin, Stephen; Baird, Donald G.; Achenie, Luke; Deshmukh, Sanket A.; Foster, Johan; He, Jason; Vikesland, Peter J.; Edwards, Marc A.; Deitrich, Andrea; Dillard, David; Lesko, John J.; Moore, Robert; Long, Timothy E.; Riffle, Judy S.; Morris, Amanda; Cheng, Shengfeng; Edgar, Kevin J.; Moeltner, Klaus; Xia, Kang; Stewart, Ryan D.; Badgley, Brian D.; Hedrick, Valisa E.; Gohlke, Julia; Duncan, Susan (Virginia Tech, 2017-05-15)
      Water scarcity is mainly caused by overwhelming human consumption and contamination, from production of water-thirsty meats and vegetables, biofuel crop production, industrial uses, and rapid urbanization. The scale of ...
    • Synthesis of Silica Membranes by Chemical Vapor Deposition Using a Dimethyldimethoxysilane Precursor 

      Oyama, S. Ted; Aono, Haruki; Takagaki, Atsushi; Sugawara, Takashi; Kikuchi, Ryuji (MDPI, 2020-03-22)
      Silica-based membranes prepared by chemical vapor deposition of tetraethylorthosilicate (TEOS) on γ-alumina overlayers are known to be effective for hydrogen separation and are attractive for membrane reactor ...