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Non-ionic contrast

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https://www.readbyqxmd.com/read/29766239/-90-y-resin-microspheres-radioembolization-for-colon-cancer-liver-metastases-using-full-strength-contrast-material
#1
I Kurilova, R G H Beets-Tan, G A Ulaner, F E Boas, E N Petre, H Yarmohammadi, E Ziv, A R Deipolyi, L A Brody, M Gonen, Constantinos T Sofocleous
OBJECTIVES: To assess safety and efficacy of 90 Y resin microspheres administration using undiluted non-ionic contrast material (UDCM) {100% Omnipaque-300 (Iohexol)} in both the "B" and "D" lines. MATERIALS AND METHODS: We reviewed all colorectal cancer liver metastases patients treated with 90 Y resin microspheres radioembolization (RAE) from 2009 to 2017. As of April 2013, two experienced operators started using UDCM (study group) instead of standard sandwich infusion (control group)...
May 15, 2018: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/29765818/targeted-epidural-blood-patch-treatment-for-refractory-spontaneous-intracranial-hypotension-in-china
#2
Fei-Fang He, Li Li, Min-Jun Liu, Tai-Di Zhong, Qiao-Wei Zhang, Xiang-Ming Fang
Objective  An epidural blood patch (EBP) is the mainstay of treatment for refractory spontaneous intracranial hypotension (SIH). We evaluated the treatment efficacy of targeted EBP in refractory SIH. Methods  All patients underwent brain magnetic resonance imaging (MRI) with contrast and heavily T2-weighted spine MRI. Whole spine computed tomography (CT) myelography with non-ionic contrast was performed in 46 patients, and whole spine MR myelography with intrathecal gadolinium was performed in 119 patients...
June 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29765074/two-fluid-hydrodynamic-model-for-spherical-electrolyte-systems
#3
Christin David
Spatial interaction effects between charge carriers in ionic systems play a sizable role beyond a classical Maxwellian description. We develop a nonlocal, two-fluid, hydrodynamic theory of charges and study ionic plasmon effects, i.e. collective charge oscillations in electrolytes. Ionic spatial dispersion arises from both positive and negative charge dynamics with an impact in the (far-)infrared. Despite highly classical parameters, nonlocal quenching of up to 90% is observed for particle sizes spanning orders of magnitude...
May 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29755973/identification-of-loop-d-domain-amino-acids-in-the-human-aquaporin-1-channel-involved-in-activation-of-the-ionic-conductance-and-inhibition-by-aqb011
#4
Mohamad Kourghi, Michael L De Ieso, Saeed Nourmohammadi, Jinxin V Pei, Andrea J Yool
Aquaporins are integral proteins that facilitate the transmembrane transport of water and small solutes. In addition to enabling water flux, mammalian Aquaporin-1 (AQP1) channels activated by cyclic GMP can carry non-selective monovalent cation currents, selectively blocked by arylsulfonamide compounds AqB007 (IC50 170 μM) and AqB011 (IC50 14 μM). In silico models suggested that ligand docking might involve the cytoplasmic loop D (between AQP1 transmembrane domains 4 and 5), but the predicted site of interaction remained to be tested...
2018: Frontiers in Chemistry
https://www.readbyqxmd.com/read/29694239/nausea-and-vomiting-after-exposure-to-non-ionic-contrast-media-incidence-and-risk-factors-focusing-on-preparatory-fasting
#5
Yeon Soo Kim, Soon Ho Yoon, Young Hun Choi, Chang Min Park, Whal Lee, Jin Mo Goo
OBJECTIVE: To prospectively evaluate the incidence of nausea and vomiting after exposure to non-ionic iodinated contrast media (ICM), and to identify potential risk factors, with a focus on fasting duration for solid food and fluids, separately. METHODS: From January to March 2017, 1175 patients (605 males, 570 females; median age, 60 years; range, 20-91 years) undergoing ICM-enhanced CT were included in this study. Patients received instructions for a 6 h preparatory fast from solid food...
April 25, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29692552/elucidating-the-role-of-osmotic-ionic-and-major-salt-responsive-transcript-components-towards-salinity-tolerance-in-contrasting-chickpea-cicer-arietinum-l-genotypes
#6
Jogendra Singh, Vijayata Singh, P C Sharma
The growth of chickpea ( Cicer arietinum L.) is extremely hampered by salt stress. Understanding of physio-biochemical and molecular attributes along with morphological traits contributing to the salinity tolerance is important for developing salt tolerant chickpea varieties. To explore these facts, two genotypes CSG8962 and HC5 with contrasting salt tolerance were evaluated in the salinity stress (Control and 120 mM NaCl) conditions. CSG8962 maintained lower Na/K ratio in root and shoot, trammeled Na translocation to the shoots from roots compared to HC5 which ascribed to better exclusion of salt from its roots and compartmentation in the shoot...
May 2018: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/29674293/protein-adsorption-and-macrophage-uptake-of-zwitterionic-sulfobetaine-containing-micelles
#7
Aijing Lu, Zhengzhong Wu, Xianglin Luo, Suming Li
Micelles of poly(ε-caprolactone)-b-poly(N,N-diethylaminoethyl methacrylate)/(N-(3-sulfopropyl-N-methacryloxyethy-N,N-diethylammonium betaine)) (PCL-PDEAPS) and poly(ε-caprolactone)-b-poly(ethylene glycol) (PCL-PEG) were prepared and characterized. The interactions of micelles with model proteins such as bovine serum albumin (BSA), lysozyme (Ly), fibrinogen (Fg) and plasma were studied from adsorption quantity, micelle size, polydispersity index (PDI) and zeta-potential measurements. The adsorption quantity of negatively charged proteins on PCL-PDEAPS micelles containing zwitterionic sulfobetaine is larger than on non-ionic PEG-PCL micelles...
April 9, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29671071/synthesis-of-highly-stable-and-biocompatible-gold-nanoparticles-for-use-as-a-new-x-ray-contrast-agent
#8
Pooya Iranpour, Maral Ajamian, Afsaneh Safavi, Nasser Iranpoor, Abdolkarim Abbaspour, Sanaz Javanmardi
This work reports a novel reduction procedure for the synthesis of Gum Arabic (GA) capped-gold nanoparticles (AuNPs) in glucosammonium formate as a new ionic liquid. The GA coated AuNPs show good stability in physiological media. The synthesized AuNPs were characterized by UV-Vis spectroscopy, transmission electron microscopy, dynamic light scattering and X-ray diffraction analysis. These stable AuNPs are introduced as a new contrast agent for X-ray Computed Tomography (X-ray CT). These nanoparticles have higher contrasting properties than the commercial contrast agent, Visipaque...
April 18, 2018: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29670976/making-strong-polyelectrolyte-brushes-ph-sensitive-by-incorporation-of-gold-nanoparticles
#9
D Boyaciyan, P Krause, R von Klitzing
Doping polymer brushes with gold nanoparticles (AuNPs) results in composite materials with colorimetric sensor properties. The present paper addresses the effect of electrostatic particle-particle interaction and the effect of the polymer brush type on particle assembly formation within the polymer matrix. The prospect for long-term use as colorimetric sensors is tested. Therefore, two different types of brushes of pH-insensitive polymers, non-ionic poly(N-isopropylacrylamide) (PNIPAM) and cationic poly-[2-(methacryloyloxy)ethyl] trimethylammonium chloride (PMETAC), are studied...
April 19, 2018: Soft Matter
https://www.readbyqxmd.com/read/29657733/contrast-medium-induced-transient-severe-leukopenia
#10
Takashi Hongo, Satoshi Nozaki, Midori Tsuchiya, Mototaka Inaba, Kenji Takahashi, Toshifumi Fujiwara
Case: Contrast medium-induced transient leukopenia is very rare. Here, we report a case of a 73-year-old man diagnosed with contrast media-induced transient leukopenia. The patient underwent abdominal contrast-enhanced computed tomography, where he was given non-ionic iodinated contrast medium i.v. His medical history included an allergic reaction to a different contrast medium. One hour later, the patient was admitted to the emergency department complaining of chest discomfort. He had leukopenia and a fever (temperature of 38...
April 2018: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/29615525/paralytic-hypo-energetic-state-facilitates-anoxia-tolerance-despite-ionic-imbalance-in-adult-drosophila-melanogaster
#11
Jacob B Campbell, Mads Kuhlmann Andersen, Johannes Overgaard, Jon F Harrison
Oxygen limitation plays a key role in many pathologies; yet, we still lack a fundamental understanding of the mechanisms responsible for variation in anoxia tolerance. Most vertebrate studies suggest that anoxia tolerance involves the ability to maintain cellular ATP despite the loss of aerobic metabolism. However, insects such as adult D. melanogaster are able to survive long periods of anoxia (LT50: ∼8 h) in a hypo-energetic state characterized by low [ATP]. In this study, we tested for possible mechanisms that allow D...
April 3, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29607424/preoperative-evaluation-of-liver-volume-in-living-donor-liver-transplantation
#12
Adil Baskiran, Aysegul Sagir Kahraman, Ipek Balikci Cicek, Tolga Sahin, Burak Isik, Sezai Yilmaz
OBJECTIVE: The aim of the present study was to retrospectively evaluate the difference between the preoperative estimated volume and the actual intraoperative graft volume determined in donor right hepatectomies and to evaluate the possible effect of age, gender, and body mass index on the difference. METHODS: A total of 225 donor hepatectomies performed at the center between 2016 and 2017 were evaluated for the study. Left hepatectomies and left lateral segmentectomies were excluded from the analysis...
2018: Northern Clinics of Istanbul
https://www.readbyqxmd.com/read/29578220/unraveling-the-effects-of-amino-acid-substitutions-enhancing-lipase-resistance-to-an-ionic-liquid-a-molecular-dynamics-study
#13
Jing Zhao, Victorine Josiane Frauenkron-Machedjou, Alexander Fulton, Leilei Zhu, Mehdi D Davari, Karl-Erich Jaeger, Ulrich Schwaneberg, Marco Bocola
Understanding of the structural and dynamic properties of enzymes in non-aqueous media (e.g., ionic liquids, ILs) is highly attractive for protein engineers and synthetic biochemists. Despite a growing number of molecular dynamics (MD) simulation studies on the influence of different ILs on wild-type enzymes, the effects of various amino acid substitutions on the stability and activity of enzymes in ILs remain to be unraveled at the molecular level. Herein, we selected fifty previously reported Bacillus subtilis lipase A (BSLA) variants with increased resistance towards an IL (15 vol% 1-butyl-3-methylimidazolium trifluoromethanesulfonate; [Bmim][TfO]), and also ten non-resistant BSLA variants for a MD simulation study to identify the underlying molecular principles...
March 26, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29566514/an-efficient-zero-order-description-of-the-fine-structure-in-the-infrared-reflection-band-of-cubic-ionic-crystals-and-the-phonon-polariton-dispersion-using-lorentz-gauge
#14
Stefan C J Meskers
The reflection of infrared light by ionic crystals with cubic symmetry such as lithium fluoride, LiF, is analyzed in terms of phonon-polaritons. In contrast to the conventional view on phonon-polaritons that uses the Coulomb gauge and assumes a purely local dielectric response of the material, we here develop an alternative description making use of the Lorentz gauge. This involves retarded interactions between charges, implying a non-local response of the material to electromagnetic radiation. The resulting new phonon-polariton dispersion relation features polaritons with negative group velocity in the frequency range in between the transverse (ωT ) and longitudinal frequency (ωL )...
March 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29552518/treatment-of-pulmonary-nodule-from-vats-to-rats
#15
Federico Davini, Sara Ricciardi, Carmelina Cristina Zirafa, Ilenia Cavaliere, Gaetano Romano, Franca Melfi
Background: The incidental detection of solitary pulmonary nodule (SPN) is currently increasing due to the widespread use of computed tomography (CT) during the follow up in oncological patients or in screening trials. A quick and definitive histological diagnosis of these nodes is mandatory as, in case of primitive lung cancer, an early detection could improve both surgical results and prognosis. The minimally invasive pulmonary resection (MIPR) is the gold standard procedure for diagnosis and treatment of small lung nodules, but it can be difficult to localize deep nonpalpable nodes that lie in the lung parenchyma...
2018: Journal of Visualized Surgery
https://www.readbyqxmd.com/read/29540546/regulation-of-nociceptive-glutamatergic-signaling-by-presynaptic-kv3-4-channels-in-the-rat-spinal-dorsal-horn
#16
Tanziyah Muqeem, Biswarup Ghosh, Vitor Pinto, Angelo C Lepore, Manuel Covarrubias
Presynaptic voltage-gated K+ (Kv) channels in dorsal root ganglion (DRG) neurons are thought to regulate nociceptive synaptic transmission in the spinal dorsal horn. However, the Kv channel subtypes responsible for this critical role have not been identified. The Kv3.4 channel is particularly important because it is robustly expressed in DRG nociceptors, where it regulates action potential (AP) duration. Furthermore, Kv3.4 dysfunction is implicated in the pathophysiology of neuropathic pain in multiple pain models...
April 11, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29525654/dispersibility-and-dispersion-stability-of-carbon-nanotubes-in-synthetic-aquatic-growth-media-and-natural-freshwater
#17
Berit Glomstad, Florian Zindler, Bjørn M Jenssen, Andy M Booth
The dispersion behavior of carbon nanotubes (CNTs) is influenced by both their physicochemical properties and by the aqueous media properties (e.g. ionic strength, presence of divalent cations and natural organic matter) in which they are dispersed. In the current study, the dispersibility and dispersion stability of four multi-walled CNTs (MWCNT) and a single walled CNT (SWCNT) with different physicochemical properties were investigated in three freshwater growth media (with and without natural organic matter; NOM) used in algae and daphnia ecotoxicity studies...
June 2018: Chemosphere
https://www.readbyqxmd.com/read/29512615/contrast-induced-encephalopathy-after-percutaneous-peripheral-intervention
#18
Muzaffer Kahyaoğlu, Mustafa Ağca, Ender Özgün Çakmak, Çetin Geçmen, İbrahim Akın İzgi
Contrast-induced encephalopathy (CIE) is a rare complication of angiography. Presently reported is the case of a patient diagnosed with CIE following peripheral angioplasty with the non-ionic contrast agent, iohexol. A 66-year-old male patient described intermittent claudication and peripheral arterial disease was suspected. Lower extremity angiography was performed, and following dilation of a 7.0x150-mm balloon, a 9.0x57-mm stent was placed in the lesioned vessel. The patient subsequently developed confusion and cortical blindness, and a seizure occurred 1 hour after the procedure...
March 2018: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/29480796/the-molecular-mechanism-of-contrast-induced-nephropathy-cin-and-its-link-to-in-vitro-studies-on-iodinated-contrast-media-cm
#19
Jai-Sing Yang, Yan-Ru Peng, Shih-Chang Tsai, Yeu-Sheng Tyan, Chi-Cheng Lu, Hong-Yi Chiu, Yu-Jen Chiu, Sheng-Chu Kuo, Yuh-Feng Tsai, Ping-Chin Lin, Fuu-Jen Tsai
Iodinated contrast media (iodinated CM) have increased ability to absorb x-rays and to visualize structures that normally are impossible to observe in a radiological examination. The use of iodinated CM may destory renal function, commonly known as contrast-induced nephropathy (CIN), which can result in acute renal failure (ARF). This review article mainly focuses on the following areas: (1) classifications of iodinated CM: ionic or non-ionic, high-osmolarity contrast media (HOCM), low-osmolarity contrast media (LOCM) and iso-osmolarity contrast media (IOCM); (2) an introduction to the physical and chemical properties of the non-ionic iodinated CM; (3) the management of anaphylactic reaction by iodinated CM; (4) a suggested single injection of adult doses and maximum dose for non-ionic iodinated CM; (5) the molecular mechanism of contrast-induced nephropathy (CIN); (6) In vitro studies on iodinated CM...
March 2018: BioMedicine
https://www.readbyqxmd.com/read/29420558/divalent-cations-are-dispensable-for-binding-to-dna-of-a-novel-positively-charged-olivomycin-a-derivative
#20
Artemy D Beniaminov, Lyubov G Dezhenkova, Olga K Mamaeva, Anna K Shchyolkina, Anna N Tevyashova, Dmitry N Kaluzhny, Alexander A Shtil
The current model of binding of the antitumor antibiotic olivomycin A (1) to GC-rich DNA regions presumes that coordination of the magnesium divalent cation with drug dimers is necessary for binding of 1 into the minor groove of the DNA duplex. Previously we have synthesized the derivatives of 1 termed 'short acid' (2) and its N,N-dimethylaminoethylamide (3). The latter compound demonstrated an improved tolerance in vivo compared to 1 and good therapeutic potency in animal models. We herein report that compound 3 is able to form stable complexes with DNA in the absence of Mg2+, in striking contrast to 1 whose binding to the DNA absolutely requires Mg2+...
2018: PloS One
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