Author: tianli

Mortazavian, Hamid published the artcileUnderstanding the role of shape and composition of star-shaped polymers and their ability to both bind and prevent bacteria attachment on oral relevant surfaces, Name: Pentaerythritol tetra(3-mercaptopropionate), the main research area is star shaped polymer bind bacteria attachment oral relevant surface; acrylic acid; antibacterial; antifouling; composition; dental; hydrophobicity; hydroxyapatite; oral; polymer; star-shaped.

In this study, we have prepared a series of 4- and 6-arm star-shaped polymers with varying mol. weight and hydrophobicity in order to provide insight into the role and relationship that shape and composition have on the binding and protecting of oral relevant surfaces (hydroxyapatite, HAP) from bacteria colonization. Star-shaped acrylic acid polymers were prepared by free-radical polymerization in the presence of chain transfer agents with thiol groups, and their binding to the HAP surfaces and subsequent bacteria repulsion was measured. We observed that binding was dependent on both polymer shape and hydrophobicity (star vs. linear), but their relative efficacy to reduce oral bacteria attachment from surfaces was dependent on their hydrophobicity only. We further measured the macroscopic effects of these materials to modify the mucin-coated HAP surfaces through contact angle experiments; the degree of angle change was dependent on the relative hydrophobicity of the materials suggesting future in vivo efficacy. The results from this study highlight that star-shaped polymers represent a new material platform for the development of dental applications to control bacterial adhesion which can lead to tooth decay, with various compositional and structural aspects of materials being vital to effectively design oral care products.

Journal of Functional Biomaterials published new progress about Adsorption. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Name: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Bertanza, Giorgio published the artcileRemoval of perfluoroalkyl substances in drinking water treatment plant, Category: alcohols-buliding-blocks, the main research area is perfluoroalkyl polyfluoroalkyl drinking water treatment plant groundwater pollution control; Activated carbon; Adsorption capacity; Breakthrough; Groundwater; PFAS.

Drinking water contamination by perfluoroalkyl and polyfluoroalkyl substances (PFASs) is an issue of relatively recent concern. The literature indicates that anion exchange resins and granular activated carbon (GAC) are suitable technologies for removing these compounds While several laboratory-scale and pilot-scale experiments have been conducted to study activated carbon adsorption/desorption mechanisms of a number of PFASs, little data on full-scale plants are available. This work examines a real case of groundwater contamination by PFASs in an area of approx. 200 km2. The performance of the main drinking water treatment plant in the area (flowrate = 30,000 m3/d; 100,000 people served), which is equipped with GAC filters, was analyzed. Approx. 17,000 anal. data points from a working period of five years were processed. Perfluorobutyric acid (PFBA) was the first compound to attain breakthrough, followed by perfluoropentanoic acid, perfluorohexanoic acid, perfluorobutanesulfonic acid, and perfluorooctanoic acid (PFOA). The adsorption capacity and treated bed volumes at complete breakthrough (saturation) were calculated, and ranged from 1.71 g/t and 7100 (PFBA) to 24.6 g/t and 50,900 (PFOA), with the total organic carbon concentration in the groundwater ranging from <0.1 to 0.5 mg/L. The overall adsorption capacity was approx. 40 g of total PFASs/t. The breakthrough behavior of PFASs was correlated with the C-F chain length, the type of hydrophilic head (either carboxyl or sulfonic), and the n-octanol/water partition coefficients logP and logD. The results corroborate the findings of previously published bench-scale and pilot-scale experiments Science of the Total Environment published new progress about Adsorption. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Liu, Xin published the artcilePolydimethylsiloxane/ionic liquid sponge used in headspace solid-phase extraction coupled with GC-MS for rapid analysis of essential oil in lavender, HPLC of Formula: 124-76-5, the main research area is essential oil lavender solid phase extraction polydimethylsiloxane analysis; GC-MS; ionic liquid; lavender essential oil; polydimethylsiloxane; solid-phase extraction.

A headspace (HS) solid-phase extraction (SPE) based on polydimethylsiloxane (PDMS)/ionic liquid (IL) sponge was developed for the extraction of lavender essential oil. The PDMS after loading of 1-butyl-3-methylimidazolium tetrachloroferrate ([BMIM]FeCl4) with a high surface area and excellent adsorption capacity was successfully applied in the SPE process. Microwave distillation (MD) coupled with HS-PDMS/[BMIM]FeCl4 extraction after GC-MS was proposed. Various exptl. parameters were studied. The optimal conditions were as follows: optimal IL, [BMIM]FeCl4; volume ratio of IL to ethanol, 1:5; extraction solvent, n-hexane; microwave power, 600 W; and irradiation time, 12 min. The limits of detection and quantification of the analytic compounds were in the ranges 4.00-16.32 and 10.00-40.00 ng, resp. The intra-day and inter-day precisions were in the ranges 0.37-1.94% and 1.20-2.45%, resp. Under the optimized conditions, 13 samples of 3 lavender varieties were analyzed, and 40 compounds were identified. Lavender varieties were distinguished using principal component anal. The results showed that MD-HS-PDMS/IL-GC-MS is a novel, simple, and sensitive method for the determination of essential oil in complex plant samples.

Biomedical Chromatography published new progress about Adsorption. 124-76-5 belongs to class alcohols-buliding-blocks, name is rel-(1R,2R,4R)-1,7,7-Trimethylbicyclo[2.2.1]heptan-2-ol, and the molecular formula is C10H18O, HPLC of Formula: 124-76-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Haney, Bobby published the artcileStimuli responsive Janus microgels with convertible hydrophilicity for controlled emulsion destabilization, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is Janus microgel stimulus hydrophilicity emulsion destabilization.

Although the utilization of rigid particles can afford stable emulsions, some applications require eventual emulsion destabilization to release contents captured in the particle-covered droplet. This destabilizing effect is achieved when using stabilizers that respond to controlled changes in environment. Microgels can be synthesized as stimuli responsive polymeric gel networks that adsorb to oil/water interfaces and stabilize emulsions. These particles are commonly hydrogels that swell and collapse in water in response to environmental changes. However, amphiphilic functionality is desired to enhance the adsorption abilities of these hydrogels while maintaining their stimuli responsivity. Microfluidic techniques are used to synthesize Janus microgels with two opposing stimuli responsive hemispheres. The particles have a temperature responsive domain connected to a pH responsive network where each side changes its hydrophilicity in response to a change in temperature or pH, resp. The Janus microgels are amphiphilic in acidic conditions at 19 °C and alk. conditions at 40 °C, while the opposite conditions cause a reduction of the amphiphilicity. By stabilizing emulsions with these dual responsive microgels, “”smart”” droplets that respond to environmental cues are formed. Emulsion droplets remain stable with smaller diameters when aqueous solution conditions favor amphiphilic particles yet, coalesce to larger droplets upon changing pH or temperature

Soft Matter published new progress about Adsorption. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhang, Yang published the artcileHighly selective and sensitive probes for the detection of Cr(VI) in aqueous solutions using diglycolic acid-functionalized Au nanoparticles, Formula: C4H6O5, the main research area is diglycolic acid functionalized gold nanoparticle probe synthesis chromium detection.

In this study, a variety of diglycolic acid-functionalized gold nanoparticle (Au NP) probes are reported, which are highly sensitive for the detection of chromium ions, Cr(VI) ions, at low concentrations in aqueous solutions based on the application of surface plasmon resonance (SPR) theory. Due to its outstanding affinity for Cr(VI) ions, the capped diglycolic acid would induce the aggregation of the NP probes upon encountering them; this was evidenced by the obvious red-shifting of the SPR peak and the enlarged size of the NPs. For the same reason, the selectivity of the probe for Cr(VI) against other heavy metal ions was found to be remarkable. Under optimized conditions, the probe showed the limit of detection (LOD) of 0.32 ppb for Cr(VI) and a linear detection scale ranging from 0.32 ppb to 0.1 ppm. To the best of our knowledge, this is probably the lowest LOD reported for Cr(VI) detection among those of the methods based on SPR.

RSC Advances published new progress about Adsorption. 110-99-6 belongs to class alcohols-buliding-blocks, name is 2,2′-Oxydiacetic acid, and the molecular formula is C4H6O5, Formula: C4H6O5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zusman, Ofri B. published the artcileDissolved organic matter adsorption from surface waters by granular composites versus granular activated carbon columns: An applicable approach, Quality Control of 111-87-5, the main research area is dissolved organic matter granular activated carbon adsorption water treatment; Dissolved organic matter; Filtration; Granules; Polymer-clay composite; Surface water.

Many new sorbents have been introduced as an alternative for granular activated carbon (GAC), the most common sorbent for dissolved organic matter (DOM) removal. In the current study, we developed an applicable granular composite based on a flocculant commonly employed for drinking water treatment adsorbed to montmorillonite. DOM adsorption from surface waters, Lake Kinneret and Suwannee River, with low and high specific UV absorption (SUVA), resp., by composite and GAC columns, was studied. Adsorption of DOM from Suwannee River was significantly higher by the composite column, in comparison to the GAC column. In-situ regeneration of the columns with a brine solution was extremely efficient and inefficient for the composite and GAC columns, resp. Adsorption, of both waters, post-regeneration by the composite column was not compromised, while GAC effectiveness decreased. The opposite trend in DOM adsorption from Suwannee River and Lake Kinneret was explained by the different affinities of the sorbents towards various DOM mols. Distinguishing between different DOM components adsorbed by GAC and the composite was supported by 13C NMR and direct pyrolysis-GC-MS measurements. Furthermore, since DOM removal by GAC and by the composite, increases, and decreases with temperature, resp., the integrated column, mitigates the changes in removal, stabilizing the adsorption performance. Such an integrated filter may minimize addnl. seasonal and water quality fluctuations.

Water Research published new progress about Adsorption. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Quality Control of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Nawaz, Tehreema published the artcileSynthesis of diglycolic acid functionalized core-shell silica coated Fe3O4 nanomaterials for magnetic extraction of Pb(II) and Cr(VI) ions, Category: alcohols-buliding-blocks, the main research area is diglycolic acid functionalized magnetite lead chromium adsorption magnetic WWT.

Abstract: Amine-terminated core-shell silica coated magnetite nanoparticles were functionalized with diglycolic acid for the first time to create acid moiety on the surface of the nanoparticles. The formation of magnetite nanoparticles was scrutinized through XRD, SEM, EDS, TEM, VSM and FTIR spectroscopy. The BET surface area of nano-sorbent was found to be 4.04 m2/g with pore size 23.68 nm. These nanomaterials were then utilized to remove the Pb(II) and Cr(VI) ions from their aqueous media and uptake of metal ions was determined by at. absorption spectroscopy (AAS). A batch adsorption technique was applied to remove both ions at optimized pH and contact time with maximum adsorption efficiency for Pb(II) ions at pH 7 while for Cr(VI) ions at pH 3. Adsorption mechanism was studied using Langmuir and Freundlich isotherms and equilibrium data fitted well for both the isotherms, showing complex nature of adsorption comprising both chemisorption as well as physio-sorption phenomena. The nanosorbents exhibited facile separation by applying external magnetic field due to the ferrimagnetic behavior with 31.65 emu/g saturation magnetization. These nanosorbents were also found to be used multiple times after regeneration.

Scientific Reports published new progress about Adsorption. 110-99-6 belongs to class alcohols-buliding-blocks, name is 2,2′-Oxydiacetic acid, and the molecular formula is C4H6O5, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yu, Xiaoxiao published the artcileA Rose bengal-functionalized porous organic polymer for carboxylative cyclization of propargyl alcohols with CO2, SDS of cas: 107-54-0, the main research area is rose bengal functionalized porous organic polymer silver nanoparticle catalyst; carboxylative cyclization catalyst propargyl alc carbon dioxide.

A Rose bengal-functionalized porous organic polymer (RB-POP) was prepared with a sp. surface area of up to 562 m2 g-1. In the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene, RB-POP supported Ag(0) nanoparticles exhibited excellent performance for catalyzing cyclization of propargyl alcs. with CO2 at 30 °C, achieving a TOF of 5000 h-1, the highest value among the reported ones.

Chemical Communications (Cambridge, United Kingdom) published new progress about Adsorption. 107-54-0 belongs to class alcohols-buliding-blocks, name is 3,5-Dimethylhex-1-yn-3-ol, and the molecular formula is C8H14O, SDS of cas: 107-54-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Premadasa, Uvinduni I. published the artcileUnderstanding Self-Assembly and the Stabilization of Liquid/Liquid Interfaces: The Importance of Ligand Tail Branching and Oil-Phase Solvation, Category: alcohols-buliding-blocks, the main research area is dioctyl phosphoric acid liquid interface oil phase solvation; Air-liquid interface; Interfacial analysis; Interfacial tension; Liquid-liquid interface; Molecular ordering; Nonlinear spectroscopy; Oil phase interactions; Solvent extraction; Sum frequency generation; Vibrational spectroscopy.

Organophosphorus-based ligands represent a versatile set of solvent extraction reagents whose chem. makeup plays an important role in extraction mechanism. We hypothesize that the branching of the extractant hydrophobic tail and its oil-phase solvation affect the liquid/liquid interfacial structure. Understanding the structure mediated adsorption and interfacial ordering becomes key in designing ligands with enhanced selectivity and efficiency for targeted extractions We employed vibrational sum frequency generation spectroscopy and interfacial tension measurements to extract thermodn. adsorption energies, map interfacial ordering, and rationalize disparate behaviors of model di-(2-ethylhexyl) phosphoric acid and dioctyl phosphoric acid ligands at the hexadecane water interface. With increased surface loading, ligands with branched hydrophobic tails formed stable interfaces at much lower concentrations than those observed for ligands with linear alkyl tails. The lack of an oil phase and associated solvation results in markedly different interfacial properties, and thus measurements made at air/liquid surfaces cannot be assumed to correlate with the processes occurring at buried liquid/liquid interfaces. We attribute these differences in the surface mediated self-assembly to key variations in hydrophobic interactions and tail solvation taking place in the oil phase demonstrating that interactions in both the polar and nonpolar phases are essential to understand self-assembly and function.

Journal of Colloid and Interface Science published new progress about Adsorption. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Li, Shu-Ying published the artcileTri-Stable Structural Switching in 2D Molecular Assembly at the Liquid/Solid Interface Triggered by External Electric Field, Computed Properties of 111-87-5, the main research area is liquid solid interface 2D mol assembly elec field; electric field; scanning tunneling microscopy; self-assembly; structural transition; switchable nanostructures.

A tri-stable structural switching between different polymorphisms is presented in the 2D mol. assembly of a 5-(benzyloxy)isophthalic acid derivative (BIC-C12) at the liquid/solid interface. The assembled structure of BIC-C12 is sensitive to the applied voltage between the STM tip and the sample surface. A compact lamellar structure is exclusively observed at pos. sample bias, while a porous honeycomb structure or a quadrangular structure is preferred at neg. sample bias. Selective switching between the lamellar structure and the honeycomb structure or the quadrangular structure is realized by controlling the polarity and magnitude of the sample bias. The transition between the honeycomb structure and the quadrangular structure is, however, absent in the assembly. This tri-stable structural switching is closely related to the mol. concentration in the liquid phase. This result provides insights into the effect of external elec. field on mol. assembly and benefits the design and construction of switchable mol. architectures on surfaces.

ACS Nano published new progress about Adsorption. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Computed Properties of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts