Tag: M.W=600-700

Guo, Rui published the artcileEnhanced X-ray attenuation property of dendrimer-entrapped gold nanoparticles complexed with diatrizoic acid, Computed Properties of 117-96-4, the main research area is dendrimer gold nanoparticle complex diatrizoic acid X ray attenuation.

A new contrast agent was developed by combining two radiodense elements of gold and iodine within a single PAMAM dendrimer-based nanodevice for potential X-ray computed tomog. (CT) imaging applications. Diatrizoic acid (DTA), an iodinated CT contrast agent, was loaded within the generated dendrimer-entrapped gold nanoparticles (Au DENPs) by three mechanisms (ionic complexation, covalent conjugation and phys. encapsulation) simultaneously. The formed Au DENP-DTA nanocomplexes with about 60 DTA mols. and 100 gold atoms loaded within each dendrimer showed good stability in aqueous solution Measurements of the X-ray absorption coefficient showed that the attenuation effect of Au DENP-DTA is much higher than that of both the com. iodine-based contrast agent at the same iodine concentration and pure Au DENPs at the same gold concentration The incorporation of both AuNPs and iodine-containing small mols. resulted in a significant cooperative enhancing effect in X-ray attenuation. The concept of combining multiple radiodense elements in one NP system may open new avenues for development of a novel class of high-performance CT contrast agents for biomedical imaging applications.

Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) published new progress about Nanoparticles. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Computed Properties of 117-96-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Tran, Thi Thuong Huyen published the artcilePhase-Pure Brookite TiO2 as a Highly Active Photocatalyst for the Degradation of Pharmaceutical Pollutants, Formula: C11H9I3N2O4, the main research area is titanium oxide nanoparticle photocatalytic degradation pharmaceutical pollutant.

Spherical-shaped brookite TiO2 nanoparticles, average size of about âˆ?10 nm, have been prepared by a hydrothermal method at 175°C for 7 h using HCl acid medium at a concentration of 3.0 M and amorphous TiO2 as precursor that was synthesized by the sol-gel method. Under the sunlight equivalent UV A (UV-A) irradiation, this brookite acts as an efficient photocatalyst for the photodegradation of recalcitrant pharmaceuticals (e.g., cinnamic acid, ibuprofen, and diatrizoic acid). The photocatalytic assay was conducted using a high pharmaceutical load and a low photocatalyst amount, corresponding to a fixed photocatalyst/pharmaceutical mass ratio of 4. The photodegradation of the pharmaceuticals was followed by a combination of UV/visible (UV/Vis) absorption spectroscopic, total organic carbon (TOC), and electrospray ionisation time-of-flight mass (ESI-TOF-MS) measurements. Scavenger experiments were carried out to confirm the importance of active species including holes and superoxide radicals acting as “”door openers”” in the photodegradation of pharmaceuticals in terms of aromatic ring opening, thus facilitating complete mineralization.

Journal of Electronic Materials published new progress about Nanoparticles. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Formula: C11H9I3N2O4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Torresi, Elena published the artcileImpact of external carbon dose on the removal of micropollutants using methanol and ethanol in post-denitrifying Moving Bed Biofilm Reactors, Application of Diatrizoic Acid, the main research area is microorganism micropollutant carbon methanol ethanol moving bed biofilm reactor; Biofilms; Carbon source; Denitrification; MBBR; Pharmaceuticals; Wastewater.

Addition of external carbon sources to post-denitrification systems is frequently used in wastewater treatment plants to enhance nitrate removal. However, little is known about the fate of micropollutants in post-denitrification systems and the influence of external carbon dosing on their removal. In this study, we assessed the effects of two different types and availability of commonly used carbon sources -methanol and ethanol- on the removal of micropollutants in biofilm systems. Two laboratory-scale moving bed biofilm reactors (MBBRs), containing AnoxKaldnes K1 carriers with acclimated biofilm from full-scale systems, were operated in continuous-flow using wastewater dosed with methanol and ethanol, resp. Batch experiments with 22 spiked pharmaceuticals were performed to assess removal kinetics. Acetyl-sulfadiazine, atenolol, citalopram, propranolol and trimethoprim were easily biotransformed in both MBBRs (biotransformations rate constants kbio between 1.2 and 12.9 L g-1biomass d-1), 13 compounds were moderately biotransformed (rate constants between 0.2 and 2 L g-1biomass d-1) and 4 compounds were recalcitrant. The methanol-dosed MBBR showed higher kbio (e.g., 1.5-2.5-fold) than in the ethanol-dosed MBBR for 9 out of the 22 studied compounds, equal kbio for 10 compounds, while 3 compounds (i.e., targeted sulfonamides) were biotransformed faster in the ethanol-dosed MBBR. While biotransformation of most of the targeted compounds followed first-order kinetics, removal of venlafaxine, carbamazepine, sulfamethoxazole and sulfamethizole could be described with a cometabolic model. Analyses of the microbial composition in the biofilms using 16S rRNA amplicon sequencing revealed that the methanol-dosed MBBR contained higher microbial richness than the one dosed with ethanol, suggesting that improved biotransformation of targeted compounds could be associated with higher microbial richness. During continuous-flow operation, at conditions representative of full-scale denitrification systems (hydraulic residence time = 2 h), the removal efficiencies of micropollutants were below 35% in both MBBRs, with the exception of atenolol and trimethoprim (>80%). Overall, this study demonstrated that MBBRs used for post-denitrification could be optimized to enhance the biotransformation of a number of micropollutants by accounting for optimal carbon sources and extended residence time.

Water Research published new progress about Acidobacteria. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Application of Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ha, Hunmoon published the artcileDegradation of the long-resistant pharmaceutical compounds carbamazepine and diatrizoate using mixed microbial culture, Product Details of C11H9I3N2O4, the main research area is long resistant carbamazepine diatrizoate degradation mixed microbial culture; Carbamazepine; DOC; HPLC; diatrizoate; mixed microbial culture.

The microbial degradation of two recalcitrant pharmaceutical compounds, carbamazepine (CBZ) and diatrizoate (DTZ), was studied in laboratory batch experiments We used a defined mixed microbial culture comprising four distinct microbial species that were previously known to have high decomposition capacity toward recalcitrant substances. Biol. decomposition in liquid phase cultures for either CBZ or DTZ, or in a combination of the two, was conducted for 12 days. DTZ and CBZ were degraded by 43.2% and 60%, resp. from an initial concentration of 100μg L-1. When degradation was assessed using a mixture of the two compounds, the initial degradation rates of CBZ and DTZ were lower than those observed in the single-compound study. However, the final cumulative removal efficiency was very similar. The extent of dissolved organic carbon (DOC) removal was correlated with the degradation of the pharmaceuticals.

Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances & Environmental Engineering published new progress about Acinetobacter. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Product Details of C11H9I3N2O4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Morais, Sergio Alberto published the artcileAccounting for the dissociating properties of organic chemicals in LCIA: An uncertainty analysis applied to micropollutants in the assessment of freshwater ecotoxicity, Name: Diatrizoic Acid, the main research area is dissociating property organic life cycle assessment; uncertainty analysis micropollutant assessment freshwater ecotoxicity.

In life cycle impact assessment (LCIA) models, the sorption of the ionic fraction of dissociating organic chems. is not adequately modeled because conventional non-polar partitioning models are applied. Therefore, high uncertainties are expected when modeling the mobility, as well as the bioavailability for uptake by exposed biota and degradation, of dissociating organic chems. Alternative regressions that account for the ionized fraction of a mol. to estimate fate parameters were applied to the USEtox model. The most sensitive model parameters in the estimation of ecotoxicol. characterization factors (CFs) of micropollutants were evaluated by Monte Carlo anal. in both the default USEtox model and the alternative approach. Negligible differences of CFs values and 95% confidence limits between the two approaches were estimated for direct emissions to the freshwater compartment; however the default USEtox model overestimates CFs and the 95% confidence limits of basic compounds up to 3 and 4 orders of magnitude, resp., relatively to the alternative approach for emissions to the agricultural soil compartment. For 3 emission scenarios, LCIA results show that the default USEtox model overestimates freshwater ecotoxicity impacts for the emission scenarios to agricultural soil by one order of magnitude, and larger confidence limits were estimated, relatively to the alternative approach.

Journal of Hazardous Materials published new progress about Biodegradation. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Name: Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Kormos, Jennifer Lynne published the artcileBiotransformation of Selected Iodinated X-ray Contrast Media and Characterization of Microbial Transformation Pathways, Formula: C11H9I3N2O4, the main research area is biotransformation iodinated Xray contrast media characterization microbial transformation pathway.

Iodinated x-ray contrast media (ICM) are commonly detected in the aquatic environment at concentrations up to the low μg/L range. The biotransformation of selected ICM (diatrizoate, iohexol, iomeprol, and iopamidol) in aerobic soil-water and river sediment-water batch systems was studied. Microbial transformation pathways are proposed. Diatrizoate, an ionic ICM, was not biotransformed, while 3 nonionic ICM were transformed into several biotransformation products (TPs) at pH 7. Iohexol and iomeprol were biotransformed to 11 and 15 TPs, resp., while 8 TPs were detected for iopamidol. Since seven of the TPs detected during biotransformation had not been previously identified, mass fragmentation experiments were completed to elucidate the chem. structures. Oxidation of primary alc. moieties, cleavage of the N-C bonds (i.e., deacetylation and removal of hydroxylated propanoic acids), and oxidative decarboxylation are potential reactions that can explain the formation of the identified TPs. Iohexol and iomeprol had similar biotransformation rates, while iopamidol was biotransformed slower and to a lesser extent. A LC tandem MS method confirmed the presence of ICM TPs in aqueous environmental samples. Fifteen of the ICM TPs were even detected in drinking water with concentrations â‰?20 ng/L.

Environmental Science & Technology published new progress about Biodegradation. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Formula: C11H9I3N2O4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Quach, Alex published the artcileThe Application of Dextran Sedimentation as an Initial Step in Neutrophil Purification Promotes Their Stimulation, due to the Presence of Monocytes, HPLC of Formula: 117-96-4, the main research area is neutrophil Purification dextran sedimentation monocyte.

The purification of human neutrophils for in vitro studies is challenging as they are easily activated through ex vivo manipulations. The technique of erythrocyte sedimentation combined with d. gradient centrifugation remains widely practiced and was the subject of this study. Since in the sedimentation step the leukocytes are incubated with dextran, we have raised the likelihood that cellular activation would occur with mediator release leading to neutrophil activation. By comparing the activity of neutrophils purified from whole blood by the classical 2-step method of dextran sedimentation followed by low-d. Ficoll-Hypaque (1.077 g/mL) medium, and the 1-step high-d. Ficoll-Hypaque (1.114 g/mL) gradient centrifugation, we found that neutrophils from the 2-step method had a significant increase in cell surface CD11b expression and CD62L shedding and a marked increase in adhesion. Decreased random migration and chemotaxis and raised baseline oxidative burst activity were also observed The effect was not specific to dextran, as using Ficoll for erythrocyte sedimentation replicated the elevated neutrophil adherence. Through the depletion of monocytes, lymphocytes, and platelets prior to sedimentation, we deduced that monocytes were responsible for the neutrophil activation. Our findings suggest that care needs to be exercised in choosing the method of neutrophil purification for functional studies.

Journal of Immunology Research published new progress about Blood platelet. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, HPLC of Formula: 117-96-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

El-Athman, Fatima published the artcileReaction kinetics of corrinoid-mediated deiodination of iodinated X-ray contrast media and other iodinated organic compounds, Formula: C11H9I3N2O4, the main research area is iodinated contrast media organic compound reaction kinetics corrinoid deiodination; Abiotic; Dehalogenation; Electron shuttle; Halogenated organic compound; Vitamin B(12).

Iodinated contrast media are found at considerably higher concentrations than any other pharmaceutical in waste water, surface water and bank filtrate. While the compounds are persistent to deiodination in aerobic environments, field data from bank filtration transects have demonstrated a partial deiodination in reducing soil-water environments. In a previous lab study, we have shown that this reductive deiodination is abiotically catalyzed by (free) corrinoids. We now investigated the reaction kinetics based on the decrease of the iodinated compound, the formation of deiodinated transformation products and the iodide release. The deiodination rate decreased with decreasing iodination degree with the deiodination rate constants k1 > k2 > k3. In contrast to the ICM, 2,4,6- and 2,3,5-triiodobenzoic acid, 5-amino-2,4,6-triiodoisophthalic acid and monoiodobenzoic acids did not show a complete deiodination under the same test conditions. Our results show that the deiodination strongly depends on the substitution pattern of the bound iodine atoms as well as on adjacent functional groups. Iodine atoms in ortho-position to another iodine atom or a carboxyl group were released more easily while an amino group in ortho-position inhibited the deiodination. Tests in tap water in the presence of B12 showed a much slower deiodination than in ultrapure water, most likely caused by competitive electron acceptors in the water matrix.

Chemosphere published new progress about Carboxyl group. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Formula: C11H9I3N2O4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Koetke, Danijela published the artcilePrioritised pharmaceuticals in German estuaries and coastal waters: Occurrence and environmental risk assessment, Name: Diatrizoic Acid, the main research area is pharmaceutical environmental risk assessment estuary coastal water pollution Germany; Baltic sea; German bight; Pharmaceuticals; Seawater; UHPLC-MS/MS.

In this study a target anal. approach with method detection limits down to 0.01 ng L-1 was developed in order to determine ultra-trace pharmaceuticals in seawater of the German coast and their estuaries. The selection of target analytes based on a prioritisation commissioned by the German Environmental Agency considering occurrence in German surface waters, production volumes and ecotoxicol. data. Using ultra-high pressure liquid chromatog. coupled to a triple quadrupole mass spectrometer equipped with an electrospray ionisation source 21 prioritised pharmaceuticals out of seven therapeutical classes (antibiotics, iodinated X-ray contrast media (ICM), analgesics, lipid reducers, antiepileptics, anticonvulsants, beta-blockers) have been detected in the low to medium ng L-1-range. The most frequently measured substance groups in the German Baltic Sea and German Bight are the ICM, represented by the non-ionic ICM iomeprol and the ionic ICM amidotrizoic acid , resp. The same pattern of substance distribution could be detected in the German Bight, the German Baltic Sea and their inflows with lower concentrations in the offshore region that are partly a result of dilution with marine water. Pharmaceuticals entering the estuaries and coastal regions are an environmental issue since data on the ecotoxicol. effects on aquatic marine organisms is limited. Especially the antibiotics clarithromycin and sulfamethoxazole could be ecotoxicol./environmentally critical

Environmental Pollution (Oxford, United Kingdom) published new progress about Coastal waters. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Name: Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Fucke, Katharina published the artcileInsights into the Crystallisation Process from Anhydrous, Hydrated and Solvated Crystal Forms of Diatrizoic Acid, Application In Synthesis of 117-96-4, the main research area is crystallization solvation mol structure crystal growth polymorphism diatrizoic acid; crystallography; halogen bonds; lattice energy calculation; neutron diffraction; polymorphism.

Diatrizoic acid (DTA), a clin. used X-ray contrast agent, crystallizes in two hydrated, three anhydrous and nine solvated solid forms, all of which have been characterized by X-ray crystallog. Single-crystal neutron structures of DTA dihydrate and monosodium DTA tetrahydrate have been determined All of the solid-state structures have been analyzed using partial at. charges and hardness algorithm (PACHA) calculations Even though in general all DTA crystal forms reveal similar intermol. interactions, the overall crystal packing differs considerably from form to form. The water of the dihydrate is encapsulated between a pair of host mols., which calculations reveal to be an extraordinarily stable motif. DTA presents functionalities that enable hydrogen and halogen bonding, and while an extended hydrogen-bonding network is realized in all crystal forms, halogen bonding is not present in the hydrated crystal forms. This is due to the formation of a hydrogen-bonding network based on individual enclosed water squares, which is not amenable to the concomitant formation of halogen bonds. The main interaction in the solvates involves the carboxylic acid, which corroborates the hypothesis that this strong interaction is the last one to be broken during the crystal desolvation and nucleation process.

Chemistry – A European Journal published new progress about Crystal growth. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Application In Synthesis of 117-96-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem