Search Indian Hydriodic Acid Manufacturers and Suppliers Details - Contact to Hydriodic Acid Exporters in India, Hydriodic Acid Wholesalers, Hydriodic Acid Distributors and Traders from India.
TY - JOUR. T1 - Potassium 4-iodylbenzenesulfonate (PIBS). T2 - An efficient recyclable hypervalent iodine reagent for iodo-functionalization of alkenes, alkynes and ketones. AU - Mironova, Irina A.. AU - Yusubova, Roza Yavidovna. AU - Kukurina, Olga S.. AU - Yusubov, Mekhman S.. AU - Zhdankin, Viktor V.. PY - 2016/8/1. Y1 - 2016/8/1. N2 - Potassium 4-iodylbenzenesulfonate (PIBS) is a thermally stable and water soluble hypervalent iodine oxidant particularly useful as a recyclable reagent for oxidative iodination of alkenes, alkynes and ketones. This reagent can be effectively recovered from the reaction mixture by treatment of the aqueous layer with Oxone at 60 ºC followed by filtration of the precipitate.. AB - Potassium 4-iodylbenzenesulfonate (PIBS) is a thermally stable and water soluble hypervalent iodine oxidant particularly useful as a recyclable reagent for oxidative iodination of alkenes, alkynes and ketones. This reagent can be effectively recovered from the reaction mixture by ...
Hemoglobin (Hb) is a tetrameric noncovalent complex consisting of two alpha- and two beta-globin chains each associated with a heme group. Its exact assembly pathway is a matter of debate. Disorders of hemoglobin are the most common inherited disorders and subsequently the molecule has been extensively studied. This work attempts to further elucidate the structural properties of the hemoglobin tetramer and its components. Gas-phase conformations of hemoglobin tetramers and their constituents were investigated by means of traveling-wave ion mobility mass spectrometry. Sickle (HbS) and normal (HbA) hemoglobin molecules were analyzed to determine whether conformational differences in their quaternary structure could be observed. Rotationally averaged collision cross sections were estimated for tetramer, dimer, apo-, and holo-monomers with reference to a protein standard with known cross sections. Estimates of cross section obtained for the tetramers were compared to values calculated from X-ray ...
Radiology Research and Practice is a peer-reviewed, Open Access journal that publishes articles on all areas of medical imaging. The journal promotes evidence-based radiology practice though the publication of original research, reviews, and clinical studies for a multidisciplinary audience.
Ultracold Electron Source for Single-Shot, Ultrafast Electron Diffraction - Volume 15 Issue 4 - S.B. van der Geer, M.J. de Loos, E.J.D. Vredenbregt, O.J. Luiten
PubMed journal article The impact of iodinated contrast agent administered during preoperative computed tomography scan on body iodine pool in patients with differentiated thyroid cancer preparing for radioactive iodine treatmen were found in PRIME PubMed. Download Prime PubMed App to iPhone, iPad, or Android
Various hypervalent iodine compounds were evaluated as reagents for intramolecular phenolic oxidative coupling. It was found that phenyliodine(III) bis(trifluoroacetate) was effective for the coupling of the monophenolic substrate 13a to 14a under neutral conditions. Vanadium oxytrifluoride and hypervalent iodine compounds were compared as oxidants for the conversion of 32 to 33. In an approach directed at a synthesis of pretazettine (17), phenacylamine 57 was elaborated in two steps to oxazole 50. However, this did not undergo catalytic hydrogenation to the desired oxazolidine 47. Oxazoline 60 proved to be too labile to be isolated upon dehydration of 65, which was prepared from di-octopamine (64) and the acid chloride of piperonylic acid (58). Finally, 64 and piperonal (69) were condensed and treated with ethyl chloroformate to provide trans-2,5-diaryloxazolidine 73. However, the latter was hydrolyzed under coupling conditions. Alternatively, when octopamine and piperonal were condensed and ...
TY - JOUR. T1 - Comparison of Iodinated Contrast Media for the Assessment of Atherosclerotic Plaque Attenuation Values by CT Coronary Angiography: Observations in an Ex-Vivo Model. AU - Maresi, Emiliano. AU - Midiri, Massimo. AU - La Grutta, Ludovico. AU - Lo Casto, Antonio. AU - Galia, Massimo. AU - Maffei, Erica. AU - Cademartiri, Filippo. AU - Grassedonio, Emanuele. AU - Gentile, Giovanni Domenico. AU - Lo Re, Giuseppe. PY - 2013. Y1 - 2013. N2 - Objective: To compare the influence of different iodinated contrast media with several dilutions on plaque attenuation in an ex vivo coronary model studied by multislice CT coronary angiography.Methods: In six ex vivo left anterior descending coronary arteries immersed in oil, CT (slices/collimation 64x0.625 mm, temporal resolution 210 ms, pitch 0.2) was performed after intracoronary injection of a saline solution, and solutions of a dimeric isosmolar contrast medium (Iodixanol 320 mgl ml(-1)) and a monomeric high-iodinated contrast medium (Iomeprol ...
Close The Infona portal uses cookies, i.e. strings of text saved by a browser on the users device. The portal can access those files and use them to remember the users data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser. ...
Hydrogen iodide (HI) is a chemical compound. Its chemical formula is HI. It is a colorless odorous gas. It reacts with oxygen to make iodine and water. It can be made by reducing iodine with hydrazine. It can also be made by reacting iodides with non-oxidizing acids such as phosphoric acid. It can also be made by reacting hydrogen sulfide with iodine. Very pure hydrogen iodide can be made by combining hydrogen and iodine, but this is very slow. It will break down if exposed to air. It can be used to make illegal drugs and various chemical compounds of iodine. It dissolves in water to produce hydroiodic acid. Hydroiodic acid is a strong acid that is used to make iodides. ...
A hypervalent molecule (the phenomenon is sometimes colloquially known as expanded octet) is a molecule that contains one or more main group elements apparently bearing more than eight electrons in their valence shells. Phosphorus pentachloride (PCl5), sulfur hexafluoride (SF6), chlorine trifluoride (ClF3), the chlorite (ClO2−) ion, and the triiodide (I3−) ion are examples of hypervalent molecules. Hypervalent molecules were first formally defined by Jeremy I. Musher in 1969 as molecules having central atoms of group 15-18 in any valence other than the lowest (i.e. 3, 2, 1, 0 for Groups 15, 16, 17, 18 respectively, based on the octet rule). Several specific classes of hypervalent molecules exist: Hypervalent iodine compounds are useful reagents in organic chemistry (e.g. Dess-Martin periodinane) Tetra-, penta- and hexacoordinated phosphorus, silicon, and sulfur compounds (ex. PCl5, PF5, SF6, sulfuranes and persulfuranes) Noble gas compounds (ex. xenon tetrafluoride, XeF4) Halogen ...
The development of left ventricular hypertrophy in patients with heart disease often has far-reaching clinical implications with respect to overall morbidity and mortality. Approaches used to assess left ventricular mass include electrocardiography, echocardiography, contrast ventriculography, single photon-emission tomography, and conventional computed tomography. However, all of these modalities suffer from some major draw back that precludes widespread application to all patients. In this study we assessed the accuracy of determinations of left ventricular mass in 22 dogs by rapid-acquisition (50 msec) computed axial tomography (RACAT), an ultrafast computed tomographic (CT) instrument. Electrocardiographically triggered, end-diastolic, short-axis cardiac scans were obtained from apex to base during administration of intravenous iodinated contrast. Myocardial edges were determined for each tomographic scan by two methods: the regional half-contour method (the CT density half way between that ...
TY - JOUR. T1 - Intravenous contrast material exposure is not an independent risk factor for dialysis or mortality. AU - McDonald, Robert. AU - McDonald, Jennifer S. AU - Carter, Rickey E.. AU - Hartman, Robert P.. AU - Katzberg, Richard W.. AU - Kallmes, David F. AU - Williamson, Eric E.. PY - 2014/12/1. Y1 - 2014/12/1. N2 - Purpose: To determine the risk of emergent dialysis and short-term mortality following intravenous iodinated contrast material exposure.Materials and Methods: This single-center retrospective study was HIPAA compliant and institutional review board approved. All contrast material-enhanced (contrast group) and unenhanced (noncontrast group) abdominal, pelvic, and thoracic computed tomography scans from 2000-2010 were identified. Patients in the contrast and noncontrast groups were compared following propensity score-based 1:1 matching to reduce intergroup selection bias. Patients with preexisting diabetes mellitus, congestive heart failure, or chronic or acute renal failure ...
Present-day electron microscopy enables sub-Angstrom spatial resolution, i.e. a single atom may be resolved, but only at exposure times of the order of seconds. The time scale of atomic motion, however, can be as short as 100 fs. The next challenge is therefore to realize both atomic spatial and temporal resolution, i.e. 0.1 nm and 0.1 ps, thus enabling the study of structural dynamics at the shortest time scales. For reasons of process repeatability, reproducibility, and radiation damage considerations single-shot operation would be ideal. Because of stringent beam requirement single-shot, 100 fs electron microscopy is completely impossible. Electron diffraction, however, is much less demanding, requiring much less charge for recording a high-quality diffraction patter and only a modest beam quality. We have developed a setup for doing single-shot, 100 fs electron diffraction. Key ingredients are creation of waterbag bunches by femtosecond photoemission and compression of bunches (inversion of ...
Scientists at the University of Toronto have employed femtosecond electron diffraction to study the ultrafast melting of aluminum under illumination b
... - Hyatt Regency Sarasota - Sarasota - Florida - United States - United States - Radiology for the Non-Radiologist \r\n April 24-28, 2017 \r\n Meeting Site: Hyatt Regency Sarasota, FL \r\n Sponsor/Certification: American Medical Seminars, Inc. designates these live activities for a maximum of 20 AMA PRA Category 1 CreditsTM. Physicians should claim only the credit commensurate with the extent of their participation in the activity. ALL Seminars Approved for 20 AMA, AAFP, ACEP, ACOG Credits. \r\n Daily Outline: \r\n Day 1- Basic Chest X-Ray Interpretation; Radiology of the Pleura: Effusion, Pneumothorax and More; Overview of Skeletal Imaging: Pearls and Pitfalls; Upper Extremity Trauma Day 2- Lower Extremity Trauma; Brain and Spine Trauma; Pulmonary Nodule: Evaluation and Follow-Up; MRI of Large Joints: Knee, Shoulder and Hip Day 3- Back Pain Imaging; Incidentalomas: Dealing With Unexpected Abnormal Findings on Radiologic Exams; Ultrasound Basics;
AuntMinnie , For patients with delayed allergic reactions to iodinated contrast media (ICM), skin tests may help in selecting an alternative agent, French researchers suggest.. As many as 3% of more than 70 million patients who are exposed to ICM annually have delayed hypersensitivity reactions, including about 0.4% of patients exposed to iodixanol, according to their July 23 online letter to the editor of the Journal of Allergy and Clinical Immunology.. Previous studies have suggested that skin tests cant diagnose delayed hypersensitivity to ICM.. In their letter, Dr. Frederic Hasdenteufel from University Hospital of Nancy and colleagues review skin test results in 22 patients who had delayed hypersensitivity reactions within 10 hours to six days after intravascular iodixanol injection.. Twenty patients who had no adverse reactions to ICM served as controls.. "This study is the largest to date to have investigated the usefulness of skin testing to select a safe ICM for challenging patients ...
The iodine atom, with its relatively high atomic weight, attenuates x-rays and is used in most intravascular contrast agents today. Iodines K shell binding energy of 33.2 keV is ideal for x-ray photon absorption. Covalent bonding of 3 iodine atoms to a benzene ring at the 2, 4, and 6 position-the basic structure of all iodinated contrast agents (Fig. 18-1)-allows iodine to be delivered intravascularly, free of the side effects of free iodine, and also increases the effective molecular concentration of iodine, improving the ability to attenuate x-rays.1 An iodine concentration of 320 to 370 mg/mL is optimal for angiographic studies. Although all iodinated contrast agents use this basic benzene ring structure, the number of rings per molecule (monomers or dimers) and the side chains at the 1, 3, and 5 positions give each of them unique chemical properties.2 ...
Researchers examined iodinated contrast media use and allergic reactions in almost 200,000 patients. Family history as well as previous individual history of reaction to iodinated contrast agents suggests a genetic predisposition. Half of the approximately 88 million CT scans conducted each year in the U.S. include the use of iodinated contrast media.
The synthesis of a new family of 10‐I‐3 hypervalent iodine compounds is described in which the CF3 functionality participates directly in the hypervalent bond ...
ARSENIC PENTOXIDE | As2O5 | CID 14771 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
TPCS, Iosol Formula II, 1 fl oz (30 ml) By TPCS 317 Reviews , Write a Review In Stock Package Quantity: 1 fl oz 1 fl oz , Iosol provides the essential iodine mineral which has been proportioned by a special process making a water soluble Iodine compound Suggested Use Mix one drop into two ounces of water Take one to three times a day ..... ...
Volatilization is the most significant hazard. Work with a volatile iodine compound whose activity exceeds 1 millicuries must be done in a fume hood unless a bioassay program is established for the user. ...
What do you do when your child *has* had a serious reaction?. I am curious about what you would do when one of your children HAS had a bad reaction to vaccines. I fully vaxxed my son (now 9) in the US...
Ethyl iodide (also iodoethane) is a colorless flammable chemical compound. It has the chemical formula C2H5I and is prepared by heating ethanol with iodine and phosphorus.[2] On contact with air, especially on the effect of light, it decomposes and turns yellow or reddish from dissolved iodine. It may also be prepared by reaction between hydroiodic acid and ethanol distilling off the ethyl iodide. Ethyl iodide should be stored in the presence of copper powder to avoid rapid decomposition, though even with this method samples do not last more than 1 year. ...
Post-exposure prophylaxis, or PEP, is whereby HIV negative people who have come into contact with HIV either through unprotected sex or through work for example health care workers. PEP must be started within 72 hours after a recent possible exposure to HIV, but the sooner you start PEP, the better. The combination for this keeps on being updated. As per August 14, 2016, the WHO recommended combination is as follows. Lamuvidine, zidovudine plus boosted lopinavir. This should be taken for 28 days. PEP work by suppressing viral replication as the body fights the virus.. ...
Scientists have made a significant advance toward making movies of extremely fast atomic processes with potential applications in energy production, chemistry, medicine, materials science and more. Using a superfast, high-resolution "electron camera," a new instrument for ultrafast electron diffraction (UED), researchers have captured the worlds fastest UED images of nitrogen molecules rotating in a gas, with a record shutter speed of 100 quadrillionths of a second ...
Principal Investigator:KATAYAMA Hitoshi, Project Period (FY):1993 - 1995, Research Category:Grant-in-Aid for General Scientific Research (B), Research Field:Radiation science
Computed tomography (CT) scans are an imaging method that use x-rays to create pictures of cross-sections of the body. Many CT scans involve intravenously injected iodinated contrast agents - but they have drawbacks such as fast clearance and side effects. Due to these limitations, nano-sized iodinated CT contrast agents have been developed that can increase the circulation time and decrease the adverse effects. In addition to iodine, nanoparticles based on heavy atoms such as gold, lanthanides, and tantalum are used as more efficient CT contrast agents.
Severely impaired lung function, cardiorespiratory failure, right-sided cardiac overload, sensitivity to other iodinated contrast agents, bronchial asthma, allergic disorders: avoid. Perform radiological monitoring during injection. Avoid intravasation. Monitor for hypersensitivity reactions during and for ≥30mins after administration. Exacerbation of portal hypertension, hepatic ischemia, hepatic failure. Do not exceed recommended dose. Latent hyperthyroidism, Hashimoto thyroditis, history of thyroid irradiation; may affect thryoid diagnostic results for up to 2yrs post-lymphography. Screen for renal dysfunction prior to intra-arterial use; consider follow-up assessments if history of renal dysfunction. Pregnancy (Cat.C). Nursing mothers: not recommended. ...
According to the American Heart Association, at least 81,100,000 (1 in 3) American adults have some form of cardiovascular disease; approximately 17,600,000 have coronary artery disease, and nearly 6,000,000 have congestive cardiac failure (2). Assessment of myocardial viability in these patients has recently been revolutionized by the introduction of delayed enhancement (DE) cardiac magnetic resonance (CMR). This simple, reproducible, noninvasive imaging technique yields images with high spatial and contrast resolution, permitting physicians to distinguish between myocardial scar/fibrosis and normal myocardium without exposing patients to iodinated contrast agents or ionizing radiation (3).. The importance of myocardial viability assessment relative to the success of coronary revascularization has been well documented (3,4). Furthermore, investigators have shown that the presence of myocardial scarring, as detected by CMR or gated single-photon emission computed tomography in preferred areas of ...
In this study, we used a laboratory X-ray system with a 1 μm microfocus X-ray source, and investigated the hindlimb peripheral vascular function in anesthetized mice. The hindlimb vessels, from large conduit femoral artery (diameters over 200 μm) to small artery-arterioles (diameters less than 100 μm), were clearly visualized with a conventional angiographic method, using bolus intra-arterial injection of iodinated contrast agent during each image acquisition (Figs. 1 and 2). In the last decade, angiograms of intra-organ microvasculature in the rodents heart [14,15], lungs [16,17], and brain [19-21] were successfully obtained by using in-vivo microangiography with synchrotron radiation as an X-ray source [25]. Some of the earlier studies using laboratory X-ray imaging sources also demonstrated the brain microvasculature in small animals [18,26]. These in vivo microangiographic techniques allow us to obtain an angiogram with acceptable spatial and time resolution for dynamic, real-time ...
Enrolled women will undergo a bilateral 2-view DE-CEDM examination after administration of an iodinated contrast agent. Separate readers on-site will ev
So who then are the great chemist-teachers? As usual this represents a limited collection of my personal favorites. Incidentally, the greatest chemist of the twentieth century was also one of its greatest teachers. When Linus Pauling was teaching undergraduates at Caltech and could not find a satisfactory textbook, he wrote his own. "General Chemistry" is still in print and still quite readable. With E. Bright Wilson, Pauling also wrote "Introduction to Quantum Mechanics", the first modern quantum chemistry textbook. And then theres of course the momentous "The Nature of the Chemical Bond" which was known not only for its science but for its superb pedagogy. Paulings lecture demonstrations to undergraduates were also well-known. A student of his described how Pauling would rapidly juggle a lump of sodium in his hands and talk at length about sodiums vigorous reaction with water, all the while warily eyeing a beaker of water on the table. The lump would then "accidentally" fall into the ...
Learn fresh ways to create interest in your chemistry lab. These easy, engaging, and safe activities are sure to produce a reaction from your students. Designed for the new teacher, but the experienced can find something useful, too.
A man who died of a fentanyl overdose Friday in his University City apartment - where several hundred thousand deadly doses of the illicit synthetic opioid...
Most people are able to use Benadryl without any problems. However, as this eMedTV page explains, serious side effects, such as heart palpitations, are possible. This resource takes a closer look and explains when to seek help.
[email protected] 1-866-267-4263 Disclaimer: AMS reserves the right to cancel any conference within 6 weeks of conference date. Registrants will receive a full refund within 7 business days. AMS is not responsible for charges associated with canceled flight or hotel rooms. AMS Cancellation Policy: Although it is rarely necessary, American Medical Seminars, Inc. reserves the right to modify speakers and subject matter. American Medical Seminars, Inc. assumes no liability beyond the refund of the seminar registration fee. In the unlikely event that AMS postpones or cancels this conference due to circumstances beyond our control, you will be provided with a refund for the registration fee or you can opt to transfer to another of our live events ...
In a recent study published in ChemComm, H. F. Schaefer and coworkers showed that the Togni trifluoromethyltation reagent and some of its derivatives appear in a high-energy hypervalent form. The (kinetic) stability of these reagents is granted by the five-membered ring of their benziodoxole-based scaffold, 2017 PCCP HOT Articles
During the European Congress of Radiology 2014 (Wien, March 6 - 10) was exhibited the Research "Automated carbon dioxide digital angiography for lower limb arterial disease evaluation: safety assessment and comparison with standard iodinated contrast media angiography" by Filippo Scalise, MD, Monza Hospital, Italy.. To consult the entire abstract, please click on the following link: Abstract Scalise E ...
Cardoso L, Gil F, Ramirez G, et al. Anat Histol Embryol 2007;36:328-331. The aim of this study was to determine the accuracy of helical computed tomography (CT)
Peter has both BSc & PhD chemistry degrees from Durham University and was then a chemistry teacher for 20 years in a Northumberland High School. He was seconded as a Royal Society of Chemistry School Teacher Fellow to Newcastle University in 2008-09 and has worked there ever since ...
Its a Wide-eyed Wonderful World of Chemistry! -- Grace Ongs Chemistry Class -- Hello! My name is Grace Ong and I am an A Level Chemistry teacher. This Google Site is where I muse about the teaching of Chemistry, and upload some of the teaching materials used during my lessons.
Now, lets pause to acknowledge a couple of subplots because they cannot be ignored. Theres a Degrassi High meets Homeland thing happening with a Chechen teenage girl and her Chemistry teacher, who (like Grimes) blames the world for his own problems. Chemistry Teach likes teenage girls too damn much. Chechen girl has seized upon this to employ the teachers help in building a bomb made of chemistry knowledge. Yes, the Chechen kid is one of the many sleeper agents waiting for the boss to call with the go signal. For reasons we shouldnt bother trying to determine, the Chechen also had a fling with a true-blue American classmate- Ill call him Trevor since I dont remember the characters actual name. Trev is totally bummed that the Chechen broke up with him, but when he took a peek at her text messages, he discovered a lot of talk about blowing up the school. Luckily for the schools sake, Trev went to a teacher and dropped a dime on the Chechen. Oh, but he went to the only teacher whos ...
The main direction of our research and education lies in a combination of chemistry with modern biological disciplines. New interdisciplinary projects on the border with physics and mathematics are also encouraged. Another important role of the institute is a training of a future chemistry teachers for secondary schools.
ALL THESE YEARS later, it turns out Brother Charles Klein was right. Klein was my high school chemistry teacher. Once, after he chided me for my seeming lack of interest in his course, I told him that it was not my intention to become a chemist and that upon obtaining a passing grade, I no doubt would quickly forget the at - Bernard Fernandez, Philadelphia Daily News
Summer Assignment Coversheet Course: A.P. Chemistry Teachers Names: Mary Engels Assignment Title: Summer Assignment A Review Assignment Summary/Purpose: To review the Rules for Solubility, Oxidation Numbers,
I while back (in the distant days when i was in education...Im a day out of education now!!) we were studying amino acids in chemistry, and I asked my chemistry teacher whether uracil was an amino acid or not. She didnt know but said she would find out, which she didnt, so I am asking the experts now ...
Also, Im unclear on the why of substitution reactions. For example, [Cu(H2O)6]2+ reacts with an excess of ammonia, it forms [Cu(H2O)2(NH3)4]2+. When my class asked our Chemistry teacher why that happens and why arent all the H2O ligands replaced, all she said was "It just does". Can someone explain it, please ...
Browse our collection of chemistry teacher information for news stories, slideshows, opinion pieces and related videos posted on AOL.com.