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Volume 18 Issue 1

January 2020

Issue of Open Chemistry

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Contents
Journal Overview

This work concerns the isolation and structure elucidation of compounds obtained from the extract of leaves and stem bark of Combretum fragrans F. Hoffm. Both extracts and some isolated compounds were tested for antiproliferative activity on glioblastoma (U87MG and C6 cells) and prostate (PC-3 cells) cancer cell lines using XTT (2,3-bis[2-methoxy-4-nitro-5-sulfophenyl]-2 H -tetrazolium-5-carboxyanilide inner salt) assay. The dichloromethane/methanol (1:1) extract of the leaves led to the isolation of two new compounds such as fragransinate ( 1 ) and combretin C ( 2 ), alongside five known compounds such as combretin A ( 3 ), belamcanidin ( 4 ), cirsilineol ( 5 ), velutin ( 6 ), and a mixture of β-sitosterol-3- O -β- d -glucopyranoside ( 10a ) and stigmasterol-3- O -β- d -glucopyranoside ( 10b ), whereas the methanol extract of the stem bark led to the isolation of three known compounds betulinic acid ( 7 ), bellericagenin B ( 8 ), and a mixture of β-sitosterol ( 9a ) and stigmasterol ( 9b ). The structure of compounds was elucidated by nuclear magnetic resonance and mass spectrometry data. The methanol extract of the stem bark showed a powerful antiproliferative activity on all tested cells, as well as the extract of leaves which also showed important cytotoxicity effect. Compound ( 3 ) showed good antiproliferative activity particularly on U87MG and PC-3 cells, whereas compound ( 5 ) exhibits moderated activity. Compounds ( 2 ) and ( 8 ) were not active on all tested cells.

Erratum

Open Access September 26, 2020

Erratum to: A one-step incubation ELISA kit for rapid determination of dibutyl phthalate in water, beverage and liquor

Qing Sun, Yanli Chen, Fuxue Li, Minghong Jia, Guoqing Shi

Page range: 1217-1217

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This review addresses a comparison, based on the literature, among nitrile rubber (NBR), ethylene-propylene-diene-monomer rubber (EPDM), and polyurethane (PU) elastomeric heat shielding materials (EHSM). Currently, these are utilized for the insulation of rocket engines to prevent catastrophic breakdown if combustion gases from propellant reaches the motor case. The objective of this review is to evaluate the performance of PU–EHSM, NBR–EHSM, and EPDM–EHSM as insulators, the latter being the current state of the art in solid rocket motor (SRM) internal insulation. From our review, PU–EHSM emerged as an alternative to EPDM–EHSM because of their easier processability and compatibility with composite propellant. With the appropriate reinforcement and concentration in the rubber, they could replace EPDM in certain applications such as rocket motors filled with composite propellant. A critical assessment and future trends are included. Rubber composites novelties as EHSM employs specialty fillers, such as carbon nanotubes, graphene, polyhedral oligosilsesquioxane (POSS), nanofibers, nanoparticles, and high-performance engineering polymers such as polyetherimide and polyphosphazenes.

This study evaluated gamma radiation-enhanced sulfamethazine (SMT) degradation, which belongs to the heterocyclic sulfonamides, in different conditions in aqueous solution. The results showed that gamma irradiation could increase the SMT removal in aqueous solution, and the SMT degradation kinetic follow the modified pseudo-first-order kinetic. The degradation rate was nearly 95% at the absorbed dose of 4 kGy. The removal of total organic carbon (TOC) and total nitrogen (TN) could be also induced. When the radiation dose was 5 kGy, the removal rates were only about 6.8% and 10.5% for TOC and TN, respectively. Some ions including HCOO − , CH 3 COO − and SO 4 2− released during SMT degradation were studied. The biodegradability and toxicity of intermediate products of the SMT degradation were also proposed in this experiment. The biodegradability of the SMT can be improved by the intermediate products of SMT degradation at the radiation dose of 1, 2 and 5 kGy. Gamma radiation could be used as a pretreatment technology before the biodegradation process of pharmaceutical waste water.

Special issue on Monitoring, Risk Assessment and Sustainable Management for the Exposure to Environmental Toxins

Open Access March 2, 2020

Insight into the cadmium and zinc binding potential of humic acids derived from composts by EEM spectra combined with PARAFAC analysis

Minru Liu, Zhihua Tang, Zhenrong Lin, Huafang Guo, Zhen Yu, Xiaoming Liu, Kejing Fang

Page range: 58-68

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Abstract

To investigate the characteristics of humic acids (HAs) and the combined effects of HAs on heavy metals, three HAs derived from kitchen waste compost (KW), pig manure compost (PM), and green waste compost (GW) were exposed to Cd(II) and Zn(II). The elemental contents and functional groups of HAs were different due to different raw materials. Fulvic-, humic-like content C1, humic-like content C4, and two protein-like contents C2 and C3 were identified in three HAs by EEM-PARAFAC analysis. The effects of HAs on heavy metals were associated with the metal species and HA source. Our results reveal that titrating Cd(II) caused stronger fluorescence quenching compared to titrating Zn(II) for all HAs. C1 and C4 of KW-HAs and PM-HAs showed fluorescence quenching after Cd(II) was added, whereas negligible fluorescence quenching was found when Zn(II) was added. In addition, C1 and C4 in the GW-HAs did not show obvious fluorescence quenching regardless of whether Cd(II) or Zn(II) was added. C3 in all HAs caused significant fluorescence quenching, suggesting that C3 plays an important role affecting the mobility of heavy metals. Consequently, these results suggest that HAs from KW and PM have greater potential for Cd-contaminated soil remediation than those from GW. Graphical Abstract

Open Access April 2, 2020

Source apportionment of soil contamination based on multivariate receptor and robust geostatistics in a typical rural–urban area, Wuhan city, middle China

ChangHong Ou, Xi Zhu, Lin Hu, Xiaoxu Wu, Weixian Yu, YiQian Wu

Page range: 244-258

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Abstract

In this study topsoil samples were collected from 57 sites of Dongxihu District which is a typical Chinese urban–rural combination area, to analyze the causes and effects of 6 heavy elements. (Ni, Pb, As, Cu, Cd, and Hg) Pollution of Enrichment factor, multivariate statistics, geostatistics were adopted to study the spatial pollution pattern and to identify the priority pollutants and regions of concern and sources of studied metals. Most importantly, the study area was creatively divided into central urban, semi-urbanized, and rural areas in accordance with the characteristics of urban development and land use. The results show that the pollution degree of potential ecological risk assessment is Hg>Ni>Cu>As>Cd>Pb, and semi-urban regions> city center> rural areas. Results based on the proposed integrated source identification method indicated that As was probably sourced from agricultural sources (33.99%), Pb was associated with atmospheric deposition (50.11%), Cu was related to industrial source 1 (45.97%), Cd was mainly derived from industrial source 2 (42.97%) and Hg come mainly from industrial source 3 (56.22%). The pollution in semi-urban areas in urbanization need more attention.

Special Issue on 13th JCC 2018

Open Access March 10, 2020

The Role of H₂C₂O₄ and Na₂CO₃ as Precipitating Agents on The Physichochemical Properties and Photocatalytic Activity of Bismuth Oxide

Yayuk Astuti, Rizka Andianingrum, Arnelli, Abdul Haris, Adi Darmawan

Page range: 129-137

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Abstract

Synthesis of bismuth oxide synthesis through the precipitation method using H 2 C 2 O 4 and Na 2 CO 3 precipitating agents, identification of physicochemical properties and its photocatalysis activity for methyl orange degradation were conducted. The bismuth oxide synthesis was undertaken by dissolving Bi(NO 3 ) 3 .5H 2 O in HNO 3 , then added precipitating agents to form precipitate. The results showed that bismuth oxide produced by H 2 C 2 O 4 precipitating agent was a yellow powder containing a mixture of α-Bi 2 O 3 (monoclinic) and β-Bi 2 O 3 (tetragonal), porous with size of 28-85 μm. Meanwhile, the use of Na 2 CO 3 as precipitating agent resulted in bismuth oxide consisting of α-Bi 2 O 3 and β-Bi 2 O 3 and Bi 2 O 4 , irregular shape without pore being 40-115 μm in size. Bismuth oxide synthesized with H 2 C 2 O 4 precipitating agent showed higher photocatalytic activity compared to bismuth oxide synthesized using Na 2 CO 3 on degrading methyl orange dye with degradation rate constants of 2.35x10 -5 s -1 for H 2 C 2 O 4 and 1.81x10 -5 s -1 for Na 2 CO 3 .

Open Access April 21, 2020

Preparation of magnetite-silica–cetyltrimethylammonium for phenol removal based on adsolubilization

Choiril Azmiyawati, Endang Sawitri, Parsaoran Siahaan, Adi Darmawan, Linda Suyati

Page range: 369-376

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Abstract

In this study, we successfully coated cetyltrimethylammonium–silica on magnetite. The material produced is used to degrade phenol waste in the waters. The effect of the addition of cetyltrimethylammonium bromide (CTAB) on the ability of phenol adsorption was assessed through changes in CTAB concentration of 1, 5, and 10 mM. The results of Fourier-transform infrared spectroscopy explain that CTAB has electrostatic interactions with the silica surface, which is induced by opposite-loaded patches on the opposite surface of silica oxide. The results of the vibrating sample magnetometer show that the magnetite that has been coated by silica–CTA has magnetic properties that are weaker than the initial magnetite, which indicates that the silica–CTA layer has blocked the magnetite. Based on the measurement of the gas sorption analyzer, the largest pore size is in the micro-mesh region, which is between 2 and 6 nm. All magnetite-silica–cetyltrimethylammonium (MS–CTA) showed good adsorption ability of phenol and correlated with the amount of loaded CTAB and admicelle density of the adsorbent. The amount of phenol adsorbed increases proportionately with the increasing density of CTAB admicelles. The maximum phenol adsorption capacity (0.93 mg g −1 adsorbent) is achieved by MS–CTA prepared at a CTAB concentration of 10 mM.

The aim of the study was to assess the impact of the duration of the use of a biofiltration bed on the efficiency of biofiltration of sulphur compounds and on the physicochemical and microbiological properties of the bed. The study was carried out at an animal waste treatment plant. Two biofiltration chambers (beds A and B) filled with different organic mixtures (compost soil, peat, coconut fibre and oak bark) were used in the biofilter. Chromatographic analysis showed a very high rate of effectiveness in the first study period, irrespective of the packaging material used. The best effects were obtained for inorganic sulphur compounds (above 99%). The duration of use of the bed material was shown to affect the efficiency of biofiltration. After 3 years of operation, thiol degradation efficiency fell below 50%. The biological decomposition of inorganic compounds (H 2 S + SO 2 ) was 73% and 59.6% in beds A and B, respectively. Analysis of the biofiltration material indicated stabilization of its physicochemical parameters. Numbers of bacteria were not found to be depend on the duration of use or the type of filtering media.

Special Issue on the 4th Green Chemistry 2018

Open Access April 7, 2020

Study and fire test of banana fibre reinforced composites with flame retardance properties

Raquel Ortega, Mario D. Monzón, Zaida C. Ortega, Eoin Cunningham

Page range: 275-286

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Abstract

The interest in natural fibre reinforced composites is growing in industrial applications due to natural fibres being an attractive alternative to synthetic fibres. However, it is necessary to improve the fire behaviour of the material because natural fibres have a high combustibility. The objective of this work is to evaluate the fire resistance of polymer composites reinforced with natural fibre fabric, using magnesium hydroxide as flame retardant for the polymeric matrix and alkali treatment for the fibre. The types of fabric are banana, banana with cotton and linen; and long banana fibre has been used for the formation of a nonwoven. The fire test is carried out based on ISO 9773 standard and the effect of the additive has been studied, chemical treatment, type of fabric and number of layers. Through statistical analysis, it is concluded that the flame propagation speed has a decreasing relation with respect to the percentage, but it decreases the mechanical properties considerably. In addition, the number of layers and type of fabric influence the fire properties. Finally, it is concluded that composites reinforced with linen fabric have the best mechanical properties, but banana nonwoven with 60% additive has the best fire behaviour.

Special Issue on the International conference CosCI 2018

Open Access April 7, 2020

Disintegration, In vitro Dissolution, and Drug Release Kinetics Profiles of _k-Carrageenan-based Nutraceutical Hard-shell Capsules Containing Salicylamide

Pratiwi Pudjiastuti, Siti Wafiroh, Esti Hendradi, Handoko Darmokoesoemo, Muji Harsini, M. Al Rizqi Dharma Fauzi, Lutfun Nahar, Satyajit D. Sarker

Page range: 226-231

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Abstract

The release of drugs from solid drug delivery materials has been studied intently in recent years. Quantitative analyses achieved from in vitro dissolution becomes easier if a zero-order mathematical model is used. Non-gelatin nutraceutical hard-shell capsules of zero size (approximately 0.7-0.8 cm) were produced from carrageenan-based natural polymers, namely carrageenan-alginate (CA) and carrageenan-starch (CS). Disintegration, dissolution and zero-order drug release kinetics of hard-shell capsules containing 100 mg of salicylamide were studied. The disintegration time of CA and CS were observed to be less than 30 min for both CA and CS. In vitro dissolution profile showed that the percentage dissolution of CA capsules was better at pH 4.5, while that of CS was poor at pH 1.2, 4.5 and 6.8. Determination of drug release kinetics profiles of carrageenan-based hardshell capsules utilized the Noyes-Whitney and Peppas-Sahlin modification rules for zero-order. The drug release from carrageenan-based capsules followed zero-order kinetics, especially at pH 6.8, and was compared to the Higuchi model. Salicylamide in CA hard-shell capsules at a pH 6.8 had a release rate constant (k H ) of 2.91 %(ppm/ ppm) min -1/2 , while the release rate constant of CS was 0.36 %(ppm/ppm) min -1 .

Open Access April 20, 2020

Synthesis of amorphous aluminosilicate from impure Indonesian kaolin

Hartati Hartati, Aning Purwaningsih, Tjitjik Srie Tjahjandarie, Nastiti Heru Saputri, Ika Septiani Puspitasari, Christina Natalia Lamanele, Amalia Ayu Sa’adah, Arini Sabilal Haque, Dea Zaqiatul Mardho

Page range: 295-302

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Abstract

Synthesis of amorphous aluminosilicates from high impurities in Indonesian kaolin were carried out in several ways, directly from kaolin and indirectly from metakaolin (calcined kaolin), both with silica addition and without silica addition. Synthesis was conducted in a gradual temperature hydrothermal reaction and in a constant temperature hydrothermal reaction. Before being synthesized, kaolin impurities were separated according to density and/or particle size by centrifugation. X-Ray Diffraction and FTIR Spectrometry characterization of the synthesized product showed that the results of synthesis of aluminosilicates from metakaolin via hydrothermal with gradual temperature or constant temperature produced aluminosilicates with high quartz impurities, while synthesis with the addition of silica in hydrothermal conditions at 80°C for 12 hours can produce aluminosilicate with a low quartz content. Direct synthesis from kaolin with the addition of silica could produce pure aluminosilicates. Graphical Abstract

The synthesis of collagen–hydroxyapatite composites has been carried out, and the biocompatibility and osteoconductivity properties have been tested. This research was conducted to determine the ability of hydroxyapatite–collagen composites to support the bone growth through the graft surface. Hydroxyapatite used in this study was synthesized from coral with a purity of 96.6%, while collagen was extracted from the chicken claw. The process of forming a scaffold of collagen–hydroxyapatite composites was carried out using the freeze-drying method at −80°C for 4 h. The biocompatibility characteristics of the sample through the cytotoxicity tests showed that the percentage of viable cells in collagen–hydroxyapatite biocomposite was 108.2%, which is higher than the percentage of viable cells of hydroxyapatite or collagen material. When the viable cell is above 100%, collagen–hydroxyapatite composites have excellent osteoconductivity as a material for bone regeneration.

The corrosion behavior of copper in 0.1 M aqueous sulfuric acid medium has been studied using potentiodynamic polarization measurements, quantum chemical calculations, and molecular dynamic simulations in the presence and absence of (2 E ,5 E )-2,5-dibenzylidenecyclopentanone ( M1 ) and (2 E ,5 E )-bis[(4-dimethylamino)benzylidene]cyclopentanone ( M2 ). The compounds were freshly prepared in high yields via the Claisen–Schmidt reaction between the cyclopentanone and the corresponding aryl aldehyde. The results from the potentiodynamic measurements imply that M1 and M2 act as mixed inhibitors due to their adsorption on the copper surface. The more pronounced corrosion inhibition performance of the M2 molecule in comparison to M1 was related to the fact that this molecule contains two basic nitrogen atoms (in 4-dimethylamino group).

Special Issue on Chemistry Today for Tomorrow 2019

Open Access August 11, 2020

Diabetes mellitus type 2: Exploratory data analysis based on clinical reading

Miroslava Nedyalkova, Sergio Madurga, Davide Ballabio, Ralitsa Robeva, Julia Romanova, Ilia Kichev, Atanaska Elenkova, Vasil Simeonov

Page range: 1041-1053

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Abstract

Open Access July 28, 2020

Advancing biodiesel production from microalgae Spirulina sp. by a simultaneous extraction–transesterification process using palm oil as a co-solvent of methanol

Yano Surya Pradana, Resti Nurmala Dewi, Kanadya Di Livia, Farida Arisa, Rochmadi, Rochim Bakti Cahyono, Arief Budiman

Page range: 833-842

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Abstract

Microalgae have been considered as a potential candidate for biodiesel feedstock. Single-stage simultaneous extraction–transesterification process is proposed for simpler and more effective biodiesel conversion. In this study, the experiment of biodiesel production from microalgae Spirulina sp. was performed in a batch-stirred reactor using palm oil as a co-solvent of methanol and catalyzed by potassium hydroxide at a percentage of 1 wt% (w/w of palm oil). The effects of methanol–palm oil molar ratio, palm oil–microalgae weight ratio, and temperature on biodiesel yield were investigated. The results showed that the best biodiesel yield was 85.28% (99.01% of partial biodiesel yield from palm oil and 16.69% of partial biodiesel yield from dry microalgae), obtained at a methanol–palm oil molar ratio of 10:1, a palm oil–microalgae weight ratio of 5:1, and at a temperature of 60°C. Upon comparison, the overall yield increased by 34.59% (37.73% of partial biodiesel yield from palm oil and 13.00% of partial biodiesel yield from dry microalgae) than that of the two-stage (conventional) method. Single-stage simultaneous extraction–transesterification process also reduced the number of unsaturated fatty acid components in biodiesel that will lower the biodiesel quality.

Topical Issue on Applications of Mathematics in Chemistry

Open Access September 14, 2020

Omega and the related counting polynomials of some chemical structures

Wei Gao, Saad Ihsan Butt, Muhammad Numan, Adnan Aslam, Zeeshan Malik, Muhammad Waqas

Page range: 1167-1172

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Abstract

Counting polynomials are mathematical functions having as coefficients the multiplicity of property partition and as exponent the extent of the corresponding partition. In this work, four counting polynomials are computed: omega, theta, sadhana, and Padmakar–Ivan (PI) polynomials of benzene ring embedded in the P-type surface on 2-D network and n -phenylene. Moreover, the closed formulas of the corresponding indices of these polynomials are also proposed. These results could help to better understand the topology of these important structures.

Open Access November 23, 2020

M-polynomial and topological indices of zigzag edge coronoid fused by starphene

Farkhanda Afzal, Sabir Hussain, Deeba Afzal, Saira Hameed

Page range: 1362-1369

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Abstract

Chemical graph theory is a subfield of graph theory that studies the topological indices for chemical graphs that have a good correlation with chemical properties of a chemical molecule. In this study, we have computed M-polynomial of zigzag edge coronoid fused by starphene. We also investigate various topological indices related to this graph by using their M-polynomial.

About this journal

Open Chemistry is a peer-reviewed open access journal that publishes original research, reviews, and communications in the fields of chemistry in an ongoing way. Our central goal is to provide a hub for researchers working across all subjects to present their discoveries, and to be a forum for the discussion of the important issues in the field.

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Open Chemistry aims to publish high quality research in the following areas:

Biological Chemistry/Biochemistry including bioanalytical chemistry, biochemistry and biological chemistry, biophysics and chemical physics in biology

Analytical Chemistry including electrochemistry, environmental chemistry, spectroscopy
Physical Chemistry including catalysis, chemical kinetics and reactivity, chemical physics, computational chemistry, chemometrics and QSAR, hydrogen technologies, hydrogen storage, nanochemistry, photochemistry, physical chemistry and physical organic chemistry, radiochemistry and nuclear chemistry, supramolecular chemistry, surface chemistry and colloids, theoretical chemistry, thermodynamics
Inorganic Chemistry including coordination chemistry, crystallography, materials and solid- state chemistry
Organic Chemistry including macromolecules and polymers, natural product chemistry, organic chemistry, organometallic chemistry, phytochemistry
Interference with other sciences including clinical chemistry, marine chemistry, medicinal chemistry, pharmaceutical chemistry

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Volume 18 Issue 1

Issue of Open Chemistry

Electrochemical antioxidant screening and evaluation based on guanine and chitosan immobilized MoS2 nanosheet modified glassy carbon electrode (guanine/CS/MoS2/GCE)

Abstract

Kinetic models of the extraction of vanillic acid from pumpkin seeds

Abstract

On the maximum ABC index of bipartite graphs without pendent vertices

Abstract

Estimation of the total antioxidant potential in the meat samples using thin-layer chromatography

Abstract

Molecular dynamics simulation of sI methane hydrate under compression and tension

Abstract

Spatial distribution and potential ecological risk assessment of some trace elements in sediments and grey mangrove (Avicennia marina) along the Arabian Gulf coast, Saudi Arabia

Abstract

Amino-functionalized graphene oxide for Cr(VI), Cu(II), Pb(II) and Cd(II) removal from industrial wastewater

Abstract

Chemical composition and in vitro activity of Origanum vulgare L., Satureja hortensis L., Thymus serpyllum L. and Thymus vulgaris L. essential oils towards oral isolates of Candida albicans and Candida glabrata

Abstract

Effect of excess Fluoride consumption on Urine-Serum Fluorides, Dental state and Thyroid Hormones among children in “Talab Sarai” Punjab Pakistan

Abstract

Design, Synthesis and Characterization of Novel Isoxazole Tagged Indole Hybrid Compounds

Abstract

Comparison of kinetic and enzymatic properties of intracellular phosphoserine aminotransferases from alkaliphilic and neutralophilic bacteria

Abstract

Green Organic Solvent-Free Oxidation of Alkylarenes with tert-Butyl Hydroperoxide Catalyzed by Water-Soluble Copper Complex

Abstract

Ducrosia ismaelis Asch. essential oil: chemical composition profile and anticancer, antimicrobial and antioxidant potential assessment

Abstract

DFT calculations as an efficient tool for prediction of Raman and infra-red spectra and activities of newly synthesized cathinones

Abstract

Influence of Chemical Osmosis on Solute Transport and Fluid Velocity in Clay Soils

Abstract

A New fatty acid and some triterpenoids from propolis of Nkambe (North-West Region, Cameroon) and evaluation of the antiradical scavenging activity of their extracts

Abstract

Antiplasmodial Activity of Stigmastane Steroids from Dryobalanops oblongifolia Stem Bark

Abstract

Rapid identification of direct-acting pancreatic protectants from Cyclocarya paliurus leaves tea by the method of serum pharmacochemistry combined with target cell extraction

Abstract

Immobilization of Pseudomonas aeruginosa static biomass on eggshell powder for on-line preconcentration and determination of Cr (VI)

Abstract

Assessment of methyl 2-({[(4,6-dimethoxypyrimidin-2-yl)carbamoyl] sulfamoyl}methyl)benzoate through biotic and abiotic degradation modes

Abstract

Stability of natural polyphenol fisetin in eye drops Stability of fisetin in eye drops

Abstract

Production of a bioflocculant by using activated sludge and its application in Pb(II) removal from aqueous solution

Abstract

Molecular Properties of Carbon Crystal Cubic Structures

Abstract

Synthesis and characterization of calcium carbonate whisker from yellow phosphorus slag

Abstract

Study on the interaction between catechin and cholesterol by the density functional theory

Abstract

Analysis of some pharmaceuticals in the presence of their synthetic impurities by applying hybrid micelle liquid chromatography

Abstract

Two mixed-ligand coordination polymers based on 2,5-thiophenedicarboxylic acid and flexible N-donor ligands: the protective effect on periodontitis via reducing the release of IL-1β and TNF-α

Abstract

Incorporation of silver stearate nanoparticles in methacrylate polymeric monoliths for hemeprotein isolation

Abstract

Development of ultrasound-assisted dispersive solid-phase microextraction based on mesoporous carbon coated with silica@iron oxide nanocomposite for preconcentration of Te and Tl in natural water systems

Abstract

N,N′-Bis[2-hydroxynaphthylidene]/[2-methoxybenzylidene]amino]oxamides and their divalent manganese complexes: Isolation, spectral characterization, morphology, antibacterial and cytotoxicity against leukemia cells

Abstract

Determination of the content of selected trace elements in Polish commercial fruit juices and health risk assessment

Abstract

Diorganotin(iv) benzyldithiocarbamate complexes: synthesis, characterization, and thermal and cytotoxicity study

Abstract

Keratin 17 is induced in prurigo nodularis lesions

Abstract

Anticancer, antioxidant, and acute toxicity studies of a Saudi polyherbal formulation, PHF5

Abstract

LaCoO3 perovskite-type catalysts in syngas conversion

Abstract

Comparative studies of two vegetal extracts from Stokesia laevis and Geranium pratense: polyphenol profile, cytotoxic effect and antiproliferative activity

Abstract

Fragmentation pattern of certain isatin–indole antiproliferative conjugates with application to identify their in vitro metabolic profiles in rat liver microsomes by liquid chromatography tandem mass spectrometry

Abstract

Investigation of polyphenol profile, antioxidant activity and hepatoprotective potential of Aconogonon alpinum (All.) Schur roots

Abstract

Lead discovery of a guanidinyl tryptophan derivative on amyloid cascade inhibition

Abstract

Electrochemical antioxidant screening and evaluation based on guanine and chitosan immobilized MoS₂ nanosheet modified glassy carbon electrode (guanine/CS/MoS₂/GCE)

LaCoO₃ perovskite-type catalysts in syngas conversion

Chirality of β₂-agonists. An overview of pharmacological activity, stereoselective analysis, and synthesis

Fe₃O₄@urea/HITh-SO₃H as an efficient and reusable catalyst for the solvent-free synthesis of 7-aryl-8H-benzo[h]indeno[1,2-b]quinoline-8-one and indeno[2′,1′:5,6]pyrido[2,3-d]pyrimidine derivatives

Removal of H₂S by vermicompost biofilter and analysis on bacterial community