Day: December 1, 2022

Busetti, Francesco published the artcileOccurrence of iodinated X-ray contrast media in indirect potable reuse systems, Safety of Diatrizoic Acid, the main research area is iodinated x ray contrast media wastewater microfiltration reverse osmosis.

A lack of knowledge of the health and environmental risks associated with chems. of concern (COCs) and also of their removal by advanced treatment processes, such as microfiltration (MF) and reverse osmosis (RO), were major barriers preventing establishment of large water recycling schemes. As part of a larger project monitoring over 300 COCs, iodinated x-ray contrast media compounds (ICM) were analyzed in treated secondary wastewater intended for drinking purposes. ICM are the most widely administered intravascular pharmaceuticals and are known to persist in the aquatic environment. A direct injection liquid chromatog. tandem mass spectrometry (DI-LC-MS/MS) method was used to monitor secondary treated wastewater from 3 major wastewater treatment plants in Perth, Western Australia. In addition, tertiary water treated with MF and RO was analyzed from a pilot plant that was built as a first step in trialling the aquifer recharge. Results collected during 2007 demonstrate that MF/RO treatment is capable of removing ICM to below the anal. limits of detection, with average RO rejection calculated to be >92%. A screening health risk assessment indicated negligible human risk at the concentrations observed in wastewater.

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

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Yu, Melvin J. published the artcilePredicting Total Clearance in Humans from Chemical Structure, Recommanded Product: Diatrizoic Acid, the main research area is pharmacokinetic clearance prediction chem structure in silico model.

A conceptually simple, fully in silico model to predict total clearance of new compounds in humans is described. Based on the premise that similar mols. will exhibit similar pharmacokinetic properties, the authors used a k-nearest-neighbors (kNN) technique to predict total clearance by comparison with known reference agents. Mol. similarity was defined using readily calculated one- and two-dimensional mol. descriptors, and the reference set was obtained by combining the Obach and Berellini sets of human pharmacokinetic data. Neutral mols. and drugs whose biol. activity is associated with a metal center were removed from the combined set. The remaining 462 compounds were partitioned into a training and external test set of 370 and 92 compounds, resp. For acids, bases, zwitterions, and quaternary ammonium/pyridinium ions, average prediction accuracy was within two-fold of observed for the external test set. Using a collection of 20 drugs from the literature with � preclin. animal species allometric scaling data, accuracy of the in silico kNN model was not as good as the rule of exponents, but better than simple allometry (SA), and approached that of combination multiexponential allometry (ME) as defined by the number of predictions with �0% error. For a collection of 18 drugs with two species (rat-dog) data, the kNN model outperformed both SA and combination ME using the same performance standard Since the model is fully in silico and, therefore, capable of generating total clearance predictions in the absence of any exptl. data, it can be used to help guide early drug discovery research efforts, such as virtual compound library screening, and analog prioritization prior to chem. synthesis and biol. evaluation. Model validation was accomplished using the external test set, three- and five-fold cross-validation and two different y-randomization techniques (y-shuffling and random number pseudodescriptors).

Journal of Chemical Information and Modeling published new progress about Homo sapiens. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Recommanded Product: Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Waters, Nigel J. published the artcileUse of the Oie-Tozer model in understanding mechanisms and determinants of drug distribution, Application In Synthesis of 117-96-4, the main research area is aminohexanoic acid biapenem carboplatin imipenem pharmacokinetics.

Volume of distribution (VD) is a key pharmacokinetic property that together with clearance determines the half-life or residence time of drug in the body. It is commonly expressed as steady-state volume of distribution VDss with a physiol. basis for its understanding developed by Oie and Tozer in 1979. The Oie-Tozer equation uses terms for plasma protein binding (fup), tissue binding (fut), and the extravascular/intravascular ratio of albumin as well as constants for the volumes of plasma, extracellular fluid, and tissue. We explored this model using a data set of 553 drugs for which VDss and plasma protein binding were available in humans. Eighteen percent of cases (102 compounds) did not obey the Oie-Tozer model, with the rearranged equation giving an aberrant fut value (fut < 0 or fut > 1), in particular for compounds with VDss < 0.6 l/kg and fup > 0.1. Further anal. of this group of compounds revealed patterns in physicochem. attributes with a high proportion exemplified by logP less than 0 (i.e., very hydrophilic), polar surface area > 150 Å2, and a difference between logP and logD > 2.5. In addition there was a high representation of certain drug classes including anti-infectives as well as neuromuscular blockers and contrast agents. The majority of compounds were also found to have literature evidence, implicating active transport processes in their disposition. This anal. provides some important insights for pharmacokinetic optimization in this particular chem. space, as well as in the application of the Oie-Tozer model for predicting volume of distribution in humans.

Drug Metabolism and Disposition published new progress about Homo sapiens. 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

Sanz, Guenhaeel published the artcileComparison of Odorant Specificity of Two Human Olfactory Receptors from Different Phylogenetic Classes and Evidence for Antagonism, Product Details of C11H12O3, the main research area is odorant olfactory receptor antagonist.

Humans are able to detect and discriminate myriads of odorants using only several hundred olfactory receptors (ORs) classified in two major phylogenetic classes representing ORs from aquatic (class I) and terrestrial animals (class II). Olfactory perception results in a combinatorial code, in which one OR recognizes multiple odorants and different odorants are recognized by different combinations of ORs. Moreover, recent data suggest that odorants could also behave as antagonists for other ORs, thus making the combinatorial coding more complex. Here we describe the odorant repertoires of two human ORs belonging to class I and class II, resp. For this purpose, we set up an assay based on calcium imaging in which 100 odorants were screened using air-phase odorant stimulation at physiol. doses. We showed that the human class I OR52D1 is functional, exhibiting a narrow repertoire related to that of its orthologous murine OR, demonstrating than this human class I OR is not an evolutionary relic. The class II OR1G1 was revealed to be broadly tuned towards odorants of 9-10 carbon chain length, with diverse functional groups. The existence of antagonist odorants for the class II OR was also demonstrated. They are structurally related to the agonists, with shorter carbon chain length.

Chemical Senses published new progress about Homo sapiens. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Product Details of C11H12O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Cometto-Muniz, J. Enrique published the artcileOdor Detection by Humans of Lineal Aliphatic Aldehydes and Helional as Gauged by Dose-Response Functions, Application In Synthesis of 1205-17-0, the main research area is odor propanal butanal hexanal octanal nonanal helional.

We have measured concentration detection (i.e., psychometric) functions to determine the odor detectability of homologous aliphatic aldehydes (propanal, butanal, hexanal, octanal, and nonanal) and helional. Subjects (16 �n �18) used a 3-alternative forced-choice procedure against carbon-filtered air (blanks), under an ascending concentration approach. Generation, delivery, and control of each vapor were achieved via an 8-station vapor delivery device. Gas chromatog. served to quantify the concentrations presented. Group and individual functions were modeled by a sigmoid (logistic) equation. Odor detection thresholds (ODTs) were defined as the concentration producing a detectability (P) halfway (P = 0.5) between chance (P = 0.0) and perfect detection (P = 1.0). ODTs decreased with carbon chain length: 2.0, 0.46, 0.33, and 0.17 ppb, resp., from propanal to octanal, but the threshold increased for nonanal (0.53 ppb), revealing maximum sensitivity for the 8-carbon member. The strong olfactory receptor (OR) ligands octanal and helional (0.14 ppb) showed the lowest thresholds. ODTs fell at the lower end of previously reported values. Interindividual variability (ODT ratios) amounted to a factor ranging from 10 to 50, lower than typically reported, and was highest for octanal and hexanal. The behavioral dose-response functions emerge at concentrations 2-5 orders of magnitude lower than those required for functions tracing the activation of specific human ORs by the same aldehydes in cell/mol. studies, after all functions were expressed as vapor concentrations

Chemical Senses published new progress about Homo sapiens. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Application In Synthesis of 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Olsson, Peter published the artcileHuman Male Superiority in Olfactory Sensitivity to the Sperm Attractant Odorant Bourgeonal, HPLC of Formula: 1205-17-0, the main research area is sperm attractant odorant bourgeonal olfactory system gender olfaction.

Recent studies have shown that sperm chemotaxis critically involves the human olfactory receptor OR1D2, which is activated by the aromatic aldehyde bourgeonal. Given that both natural and sexual selection may act upon the expression of receptors, we hypothesized that human males are more sensitive than human females for bourgeonal. Using a 3-alternative forced-choice test procedure, olfactory detection thresholds were determined for a total of 500 subjects, 250 males, and 250 females between 18 and 40 years of age. We found that male subjects detected bourgeonal at significantly lower concentrations (mean value: 13 ppb) compared with female subjects (mean value: 26 ppb), whereas no such gender difference in olfactory sensitivity was found with helional, a structural analog of bourgeonal, and with n-pentyl acetate, an aliphatic ester, which were tested in parallel. Males and females did not differ in their frequency of specific anosmia for any of the 3 odorants. The frequency distributions of olfactory detection thresholds were monomodal with all 3 odorants in both genders. Olfactory detection thresholds did not differ significantly between pre- and postovulatory females with any of the 3 odorants. To the best of our knowledge, this is the first study ever to find a human male superiority in olfactory sensitivity. Single nucleotide polymorphisms and/or copy number variations in genes coding for olfactory receptors may be the proximate cause for our finding, whereas a gender difference in the behavioral relevance of bourgeonal may be the ultimate cause.

Chemical Senses published new progress about Homo sapiens. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, HPLC of Formula: 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Schmiedeberg, Kristin published the artcileStructural determinants of odorant recognition by the human olfactory receptors OR1A1 and OR1A2, COA of Formula: C11H12O3, the main research area is olfactory receptor OR1A1 A2 gene odorant.

An interaction of odorants with olfactory receptors is thought to be the initial step in odorant detection. However, ligands have been reported for only 6 out of 380 human olfactory receptors, with their structural determinants of odorant recognition just beginning to emerge. Guided by the notion that amino acid positions that interact with specific odorants would be conserved in orthologs, but variable in paralogs, and based on the prediction of a set of 22 of such amino acid positions, we have combined site-directed mutagenesis, rhodopsin-based homol. modeling, and functional expression in HeLa/Olf cells of receptors OR1A1 and OR1A2. We found that (i) their odorant profiles are centered around citronellic terpenoid structures, (ii) two evolutionary conserved amino acid residues in transmembrane domain 3 are necessary for the responsiveness of OR1A1 and the mouse ortholog Olfr43 to (S)-(-)-citronellol, (iii) changes at these two positions are sufficient to account for the differential (S)-(-)-citronellol responsiveness of the paralogs OR1A1 and OR1A2, and (iv) the interaction sites for (S)-(-)-citronellal and (S)-(-)-citronellol differ in both human receptors. Our results show that the orientation of odorants within a homol. modeling-derived binding pocket of olfactory receptor orthologs is defined by evolutionary conserved amino acid positions.

Journal of Structural Biology published new progress about Homo sapiens. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, COA of Formula: C11H12O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Musa, Musiliyu A. published the artcileIdentification of 7,8-dihydroxy-3-phenylcoumarin as a reversible monoamine oxidase enzyme inhibitor, Application of 4-Methoxyphenylacetic acid, the main research area is dihydroxy phenylcoumarin monoamine oxidase enzyme inhibitor neuroprotection; 3-arylcoumarin; molecular modeling; monoamine oxidase inhibitors; neuroprotection; structure-activity relationship.

We herein report the biol. evaluation of 3-arylcoumarin derivatives (3a-l) as potential human monoamine oxidase-A and -B (hMAO-A and hMAO-B) inhibitors. The result indicated that 7,8-dihydroxy-3-(4-nitrophenyl)coumarin (3j) was most effective against MAO-A (inhibition concentration [IC50] = 6.46 ± 0.02μM) and MAO-B (IC50 = 3.8 ± 0.3μM) enzymes than other synthesized compounds and reference compounds (pargyline and moclobemide). Furthermore, compound (3j) showed (a) nonselectivity against hMAO enzymes, (b) reversible hMAO enzymes inhibition, and (c) neuroprotection against H2O2-treated human neuroblastoma (N2a) cells. Finally, a mol. modeling study revealed that the hMAO enzymes inhibitory activity of the compound (3j) may be due to the orientation where the nitro (NO2) group lies deep into the receptor and the Ph ring directed toward flavin adenosine dinucleotide via hydrogen bond interaction, and possible π-π interaction with various important residues. Thus, the results of the present study demonstrate that compound (3j) can be considered as a promising scaffold for the development of hMAO-A and hMAO-B inhibitors.

Journal of Biochemical and Molecular Toxicology published new progress about Homo sapiens. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Application of 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Lee, Sang Hun published the artcileMimicking the human smell sensing mechanism with an artificial nose platform, Synthetic Route of 1205-17-0, the main research area is odor sensor olfactory sensor olfaction carboxylated polypyrrole nanotube electrode.

Sensing smell is a highly complex biol. process, and characterizing and mimicking the interaction between the olfactory receptor (OR) protein and its ligands is extremely challenging. Herein, we report a highly sensitive and selective human nose-like nanobioelectronic nose (nbe-nose), which responds to gaseous odorants sensitively and selectively, has a signal specificity pattern similar to that in the cellular signal transduction pathway, and maintains an antagonistic behavior similar to the human nose. The human olfaction mechanism was mimicked by using carboxylated polypyrrole nanotubes (CPNTs) functionalized with human OR protein. The nbe-nose was able to detect gaseous odorants at a concentration as low as 0.02 parts-per-trillion (ppt), which was comparable to a highly trained, human expert’s nose. The nbe-nose can be used scientifically for smell mechanism studies. It can be also applied to various fields that rely on smell monitoring for industrial and public purposes.

Biomaterials published new progress about Homo sapiens. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Synthetic Route of 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Castillo-Luna, A. published the artcileThe secoiridoid profile of virgin olive oil conditions phenolic metabolism, Category: isoquinoline, the main research area is secoiridoid extra virgin olive oil phenolic metabolism; LC–MS/MS; Microbial metabolism; Olive oil; Phase I metabolism; Phase II metabolism; Secoiridoids.

The European Food Safety Authority highlights the beneficial effects of olive oil phenols, mainly, secoiridoids. Nevertheless, the metabolism of secoiridoids in humans has not been fully elucidated. This research evaluated the metabolism of secoiridoids in humans after intake of olive oils with diverse phenolic profiles. For this purpose, three extra virgin olive oils (EVOOs) were ingested by six volunteers at scheduled meals, and urine samples were collected the following morning for subsequent LC-MS/MS anal. Using untargeted anal., urinary metabolites revealed representative patterns associated with the various olive oil phenolic contents in absolute and relative terms. We were able to identify metabolites obtained through phase I, phase II, and microbial metabolism with discrimination between tyrosol and hydroxytyrosol derivatives Metabolism of phenols is differentially activated as a function of the olive oil secoiridoids content, and this proof-of-concept study shows how urinary metabolites represent olive oil phenolic content.

Food Chemistry published new progress about Homo sapiens. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem