A5014727534- Polymer crystallization and properties
- Epoxy Resin Curing Processes
- Polymer Nanocomposites and Properties
- Fiber-reinforced polymer composites
- High voltage insulation and dielectric phenomena
- Polymer Science and PVC
- Mechanical Behavior of Composites
- Neurosurgical Procedures and Complications
- Silicone and Siloxane Chemistry
- Corrosion Behavior and Inhibition
- Spectroscopy and Chemometric Analyses
- Glioma Diagnosis and Treatment
- Intracerebral and Subarachnoid Hemorrhage Research
- Synthesis and properties of polymers
- Advanced Polymer Synthesis and Characterization
- Photopolymerization techniques and applications
- Microplastics and Plastic Pollution
- Power Transformer Diagnostics and Insulation
- Cerebrospinal fluid and hydrocephalus
- Acute Ischemic Stroke Management
- Traumatic Brain Injury and Neurovascular Disturbances
- Meningioma and schwannoma management
- Recycling and Waste Management Techniques
- Spinal Dysraphism and Malformations
- Intracranial Aneurysms: Treatment and Complications
Weill Cornell Medicine
2021-2025
New York Hospital Queens
2019-2025
Neurological Surgery
2017-2025
NewYork–Presbyterian Hospital
2019-2025
Cornell University
2019-2025
Presbyterian Hospital
2019-2024
Memorial Sloan Kettering Cancer Center
2021-2022
Cellectis (United States)
2022
Starr Foundation
2022
Columbia University
2016-2017
Abstract The effect of oxygen on the liquid‐phase polymerization vinyl chloride at 55°C in presence an added initiator, bis(4‐ tert ‐butylcyclohexyl) peroxydicarbonate (Perkadox 16), has been studied by technique tumbled dilatometry. With this method, constant initiator concentration, induction period showed a half‐order dependence initial concentration. At varied inversely as square root Under experimental conditions empolyed, polyperoxy radicals with chloroalkyl (∼CH 2 ĊHCl) endgroups were...
The reaction product of 4-hydroxyacetanilide and 1,2-epoxy-3-phenoxypropane, when added at 19 wt% to a conventional epoxy-resin-curing agent mixture, increases the tensile strength cured system from 82 MPa 123 shear modulus (20°C, 1 Hz) 970 1560 MPa. As well as showing increased strength, tensile-test specimens also fail in ductile fashion, i.e., slope stress–strain curve is negative failure, with appreciable localized deformation occurring during fracture. For notched samples (compact...
Abstract The variety of wide‐angle x‐ray scattering (WAXS) patterns exhibited by nylon‐6 fibers with different fabrication histories is rationalized using a model comprising three limiting structures, viz., an α, γ, and pleated α structure. γ structures both have single broad reflection in the range 2θ = 19° −25°, but differ their annealing behavior. At 205° ( vacuo ), structure converts to normal removal pleats, without breaking any hydrogen bonds. structure, however, remains unchanged...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInitiation of Polypropylene Photooxidation. 2. Potential Processes and Their Relevance to StabilityD. J. Carlsson, A. Garton, D. M. WilesCite this: Macromolecules 1976, 9, 5, 695–701Publication Date (Print):September 1, 1976Publication History Published online1 May 2002Published inissue 1 September 1976https://pubs.acs.org/doi/10.1021/ma60053a002https://doi.org/10.1021/ma60053a002research-articleACS PublicationsRequest reuse permissionsArticle...
Genomic analysis in neurooncology has underscored the importance of understanding patterns survival different molecular subtypes within gliomas and their responses to treatment. In particular, diffuse are now principally characterized by mutation status (IDH1 1p/19q codeletion), yet there remains a paucity information regarding prognostic value markers extent resection (EOR) on survival. Furthermore, given modern emphasis rather than histological diagnosis, it is important examine effect...
The insulation from six 5 kV power cables, which has been in service underground for 6 to 8 years, was examined by infrared (IR) spectroscopy and oxidation induction time (OIT) analysis. Sections of containing water trees were found contain high levels ionic contaminants. All samples showed evidence oxidative degradation frequently there a higher than average level the treed regions insulation. had appreciably shorter OIT's untreed regions, indicating that they more prone subsequent...
Poly(ϵ-caprolactone) (PCL) of ca. 20,000 molecular weight is shown to be partially miscible with three aromatic-amine-cured epoxy resins. This conclusion based on the depression Tg, effect physical and mechanical properties, observation that a large proportion (40-55%) PCL ester groups are involved in hydrogen bonding. miscibility behavior compared blends anhydride-cured resins, which appear have two-phase morphology. The different miscibilities rationalized basis existence functional (e....
INTRODUCTION: Cerebral cavernous malformations (CCMs) occur in both pediatric and adult patients. However, the characteristics of CCMs have not yet been thoroughly described children. METHODS: Using radiology records, 237 patients with between May 1991 December 2022 were identified retrospectively reviewed for demographics, imaging, clinical characteristics. Pediatric defined as age<18y at time diagnosis. The Mann-Whitney chi-square tests used to compare variables RESULTS: 15 (M/F=5/10)....
BACKGROUND: The efficacy of minimally invasive surgery (MIS) in improving outcomes after nontraumatic intracerebral hemorrhage (ICH) remains uncertain, with inconsistent findings from randomized clinical trials. Our objective was to evaluate the real-world impact MIS on ICH using a nationally representative cohort. METHODS: We performed retrospective cohort study patients enrolled American Heart Association Get With Guidelines-Stroke Registry between January 1, 2011, and December 31, 2021....
The potential of Raman microscopy for the examination phase structure and composition polymer blends is described. Provided that highly efficient collection optics are used, together with a CCD camera detector, common problems specimen heating fluorescence can be reduced by use relatively low-power (25mW) HeNe laser. For thin (<5 μm) film specimens, submicron morphological features resolved compositions determined. thicker sampling depth controls spatial resolution, but micron-scale...
Abstract The use of a range additives is described which can increase the strength and modulus cured epoxy‐amine systems by up to 70 per cent. These additives, called ‘Epoxy Fortifiers’, are liquids or low melting point solids incorporated into resincuring agent mixture, prior curing, at loadings 10–40 parts hundred resin.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnionic Polymerization of Butadiene in Tetrahydrofuran. I. Isomerization Polybutadienyl SaltsA. Garton and S. BywaterCite this: Macromolecules 1975, 8, 6, 694–697Publication Date (Print):November 1, 1975Publication History Published online1 May 2002Published inissue 1 November 1975https://pubs.acs.org/doi/10.1021/ma60048a002https://doi.org/10.1021/ma60048a002research-articleACS PublicationsRequest reuse permissionsArticle...
From a consideration of oxidative free radical reactions in solid polypropylene, it is concluded that only small fraction the peroxy radicals expected to cause bulk oxidation and need be scavenged for effective photo-stabilization.Most terminate after few propagation steps with another radi cal descended from same initiation event.The escape this "secondary cage" recombination produce long lived chains very high kinetic length, which are easily scavenged.Tetramethylpiperidines their products...
Abstract A method is described for calculating crystallinity indices and crystalline orientation functions the α γ components of phase nylon 6 filaments using wide‐angle x‐ray diffraction (WAXS) analysis. The shown to be applicable a wide range filament samples (“conventional” as‐spun, fast spun, drawn, annealed) even when only single broad maximum observable from WAXS photograph. component can used illustrate differences present in microstructure which would unobservable if total index,...
Abstract The photo‐oxidation of solid polymers at ambient temperatures is shown to be greatly affected by the low mobility radicals in state. When a radical pair, produced photo‐initiation, escapes initial polymer cage, probability its recombination remains high even after several propagation steps. This phenomenon, known as secondary cage recombination, has pronounced effect on kinetics oxidation and mechanism photostabilisation scavengers. occurrence demonstrated for polypropylene kinetic...