A series of new poly(amide-imide)s was prepared by polycondensation of our already reported diamine, N,N’-[((propane-2,2-diylbis(4,1-phenylene) bis(oxy))bis(4,1-phenylene)]bis(4-aminobenzamide) (BDM) containing flexible ether and amide linkages with different aromatic dianhydrides via simple two-step method. The synthesized poly(amide-imide)s were characterized by FTIR spectroscopy and elemental analysis

In the production of palm-based polyols (PBP), multiple purification steps might introduce sodium (Na) and potassium (K) into the polyols. The Na and K have potential to influence reactivity of polyether polyols with isocyanate in polyurethane (PU) production. The Na and K contents in polyether polyols for PU production are both limited to 10 mg kg−1. This study focuses on method(s) development for

Herein we describe the synthesis of five new 2-aryl and 2-alkylimidazolone derivatives via an effective one-pot synthetic strategy assisted by microwave irradiations which allowed us to access the desired product in a reduced time reaction compared to the thermal heating and a slightly better yield (48% compared to 45%). The new imidazolone derivatives were evaluated for their anticancer activity in

Two homologous series of alkoxyphenylcarbamic acids esters with biological activities were subjected to the QSRR (Quantitative Structure–Retention Relationships) study. Retention factors of studied derivatives were measured in four different HPLC (High Performance Liquid Chromatography) systems. Experimental data in combination with in silico calculated molecular descriptors were used for development

Ultra-high-performance liquid chromatography coupled with linear trap quadrupole-orbitrap mass spectrometry (UHPLC-LTQ–Orbitrap MS) with multivariate statistical analysis was applied for the metabolite profiling and assessing antioxidant activity of ten commercial vinegars produced by traditional fermentation techniques. Totally, 28 metabolites including three organic acids, three phenolic acids, 11

The visual detection of mitochondrial viscosity is of considerable significance in that it is associated with various cellular functions. Herein, a novel red-emitting viscosity probe YD-Mito constructed by linking phenylamine derivatives and benzo[e]indolium through a C–C double bond has been designed and synthesized. It was found that YD-Mito exhibited a special response to viscosity accompanying

Herein, a two-component cocrystal [Ph3SnCl(4-PCAPh) 1] encompassing 4-PCAPh = N-isonicotinyl, N′,N″-bis(hexamethylenyl) phosphoric triamide and triphenyltin(IV) chloride in 1:1 stoichiometric ratio has been reported. Crystallographic information and theoretical calculations, mainly analysis based on the non-covalent interactions (NCI) visualization index, were pursued to generate a profound understanding

The effect of CaO-MgCO3 additives on the combustion property of semi-coke (SC) was investigated using thermogravimetric analysis. Based on the experimental results, the addition of CaO (Ca/S = 2) on SC could reduce the ignition temperature (about 1.3 °C) and burnout temperature (about 0.99 °C). Besides, the additive of CaO on SC had significantly decreased the emissions of SO2 and NOx. However, the

The fabrication of an efficient electro-catalyst, made of non-precious metals, for oxygen evolution reaction (OER) is an exciting task. A simple cathodic deposition followed by electrochemical anodic activation has been proposed to prepare a potential electro-catalyst, amorphous nickel oxyhydroxide, on a stainless steel (SS) substrate wherein the whole fabrication procedure completes within a minute

The influence of charge, hydrophobicity, and spatial characteristics on the analytical signal of cationic and anionic surfactants in their association with fluorescent reagents in aqueous solutions is studied. The increase in the analytical signal of the surfactant and the shift in the position of the fluorescence wavelengths maximum with increasing contribution of the role of electrostatic interactions

A novel approach was presented as a strategy for deriving adsorption capacity and isotherm by a single adsorbate concentration in the liquid–solid system with experimental proof utilizing frontal chromatography (FC). A breakthrough curve equation presented in this work shows the dependence of adsorbate concentration in feed solution on time in FC and can be used to derive three characteristic binding

A bioassay-guided isolation method was performed with pancreatic cholesterol esterase as a target enzyme. Four pyranocarbazole alkaloids, 8-hydroxymahanimbine (1), mahanine (2), mahanimbicine (3) and mahanimbine (4) were isolated from Clausena cambodiana Guill leaves for the first time. Furthermore, compound 1 has never before been isolated as a natural product. The chemical structures of the isolated

Industry is looking for more efficient ways to use nanomaterials to decrease water consumption. The addition of greater thermal conductivity nanoparticles to the water enhances the fluid's thermal conductivity and, thus, increases the coefficient of heat transfer. In this work, water-based nanofluids were used to perform heat transfer enhancement studies in a shell and helical coil heat exchanger.

A highly efficient and environmentally benign synthesis of N-fused heterocyclic compounds including pyrido[1,2-a]pyrimidine-6-one moiety is successfully achieved via a sequential four-component reaction. The process involves the formation of diversely substituted 9-nitro-1,2,3,4,7,8-hexahydro-6H-pyrido[1,2-a]pyrimidin-6-ones from the reaction of Meldrum’s acid, benzaldehydes, 1,1-bis(methylthio)-2-nitroethylene

A simple and low-cost differential pulse-adsorptive cathodic stripping voltammetry (DP CSV) approach has been established for trace determination and speciation of Pb using Thorin-I as selective chelating agent. The established assay was based upon controlled preconcentration of Pb–Thorin complex at pH 8.3–9.0 at a hanging mercury dropping electrode (HMDE). The resulting cathodic peak current (Ip,c)

Two series of nanocomposite materials based on graphene oxide (GO) (Al2O3/GO (Al/GO), Fe3O4/GO (Fe/GO), and Fe3O4–Al2O3/GO (Fe–Al/GO)), and reduced graphene oxide (rGO) (Al2O3/rGO (Al/GO), Fe3O4/rGO (Fe/GO), and Fe3O4–Al2O3/rGO (Fe–Al/rGO)) were prepared and characterized by X-ray and infrared spectra, SEM, TEM and EDX analyses. Graphene oxide was synthesized from graphite by improved Hummers method

The present investigation covers the synthesis, characterization and applications of a novel nano-composite of multiwalled carbon nanotubes–tin zirconium molybdophosphate (MWCNTs–SnZrMoP) ion exchanger. The synthesized material was characterized by various instrumental techniques viz. Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), high-resolution

Different photo-thermal agents such as gold nanostructures with various shapes and sizes including nano-rods, nano-cages, nano-shells exhibit tunable optical properties, surface chemistry, resonance frequency and non-toxicity. Furthermore, gold nanoparticles (Au NPs) also utilized for diagnosis purposes and drug carriers for thermo-therapy of biological cells targets and potential bio-medical applications

The studies on molecular interactions of drug candidates with HSA have considerably contributed to the understanding of primary biological evaluation of potential drug. In this context, Schiff base, (E)-2-((2-hydroxy-3-methoxybenzylidene)amino)-6H-benzo[c]chromen-6-one (1) derived from o-vanillin and 6-amino-3,4-benzocoumarin was synthesized and characterized by elemental analysis, UV–Vis, IR, NMR

Recently, different investigations have been performed to study the inhibiting effect of metal nanoparticles, which have shown high competence in delaying the onset of asphaltene precipitation. The goal of this work is to investigate the effect of Fe3O4 metal nanoparticles on the size variation of asphaltene aggregates. The size distribution of three types of asphaltenes at different heptane to toluene

The effect of reduction and reaction conditions on catalytic performance and surface reaction rate of Fischer–Tropsch synthesis over Co–Ni/Al2O3 catalyst was studied in a stainless steel fixed-bed micro-reactor. Experiments were done over a collection of different reduction and reaction conditions, including reduction temperature (250–450 °C), reduction time (2–10 h), reducing agent (H2, CO and mixing

In this work, a new Co(II)-containing metal–organic framework (MOF) has been generated through the reaction between 1,3,5-benzenetribenzoate (H3BTB) and Co(II) salt in the existence of a anthracene based N-donor ligand 9,10-bis(1H-imidazol-1-yl)anthracene (dia), and its chemical formula is [Co2(μ3-OH)(dia)(btb)·2H2O]·EtOH·0.5DMF (1). The photocatalytic experiments show that complex 1 has excellent

Facile preparation of one-dimensional spinel material is highly attractive for their widespread usage in energy storage devices. Herein, we report uniform one-dimensional CoMn2O4 nanorods were prepared by cetyl trimethyl ammonium bromide (CTAB) assisted hydrothermal technique followed by subsequent calcination process. The prepared materials were characterized to different types of physicochemical

This work investigates the adsorption mechanism of alachlor and pentachlorobenzene on chars (hydrochars and biochars) originated from Miscanthus giganteus and sugar beet shreds. Two different processes were used: hydrothermal conversion at three temperatures (180, 200, and 220 °C) and slow pyrolysis at 400 °C. Specific surface area (SSA) for all investigated chars ranged 3.87–260 m2/g, whereby biochars

One of the most significant public health challenges of the twenty-first century is the prevention and treatment of infectious diseases caused by various microorganisms, including resistant bacteria and viruses. With aging, there is a progressive alteration of the immune system and its responses that may result in immune senescence and immunodepression. Nevertheless, immune modulators can speed up

We conducted a series of experiments to determine the effect of doses of CaO and Ca(OH)2 added to a synthetic solution, prepared with the same salt of Cr as that found in Mexican tanneries, to precipitate the chromium and determine the amount of sludge. The stirring was kept at 150 rpm during 10 min of time of contact between reagents, followed by measurements of Cr in the supernatant and determination

Anthracnose and crown-rot postharvest diseases of banana fruit are responsible for major postharvest losses of the fruit. For natural control of these diseases, in vitro antifungal activity of cassia and holy basil essential oils was evaluated by disc volatilization method. Cassia essential oil at 6 μL per plate exhibited 100% growth inhibition of both the causative fungal pathogens, namely Colletotrichum

Amino acid derived polypeptides are often biocompatible, and hence the materials of choice in nanoparticle formulations to avoid nanotoxicity and associated complications. A hydrophilic linear polypeptide γ-poly(l-glutamic acid) can form self-assembled nanoparticles only when made amphiphilic by chemical modification. Present work investigated pharmaceutical feasibility of a newly synthesized l-glutamic

A new anthraquinone, 1,6-dihydroxy-2-hydroxymethyl-5-methoxy-9,10-anthracenedione (1), along with four known compounds, including 1,2-dimethoxyanthraquinone (2), morindone-5-methylether (3), scopoletin (4), and fraxidin (5) were isolated from the methylene chloride extract of the stem bark of Morinda lucida Benth. Structure elucidation was accomplished by analysis of the 1D and 2D NMR, IR and mass

Electroactive polymers such as polyaniline and its derivatives have many potential applications, but the nature of the dopants can have an adverse effect on their properties. Polyaniline (PANI), poly(o-methoxyaniline) (POMA) and poly(o-toluidine) (POT) have been synthesised using appropriate organic acid dopants (2-naphthalenesulfonic acid and 1,5-naphthalenedisulfonic acid) via electrochemical and

In the present times, low cost and greener biogenic synthesis of nanomaterials is considered as an alternative to the chemical synthesis, but in depth mechanism and the incorporated phytochemicals in the synthesized material still need to be investigated. In this regard, here we have investigated the phyto-compounds of Ficus palmata Forssk (Moraceae) leaves to develop an organic framework for the synthesis

Due to the low efficiency of physical–chemical treatments, advanced oxidative processes (AOP) appear as an efficient treatment alternative for removing organic compounds. To replace some of the reagents used in the photo-Fenton AOP with low-cost materials, the present study evaluated the degradation of direct black dye 22 (DB22) under LED radiation in a homogeneous and heterogeneous medium (iron residue)

Liver cancer is known as a high morbidity and low survival disease all around the world. This cancer is the most traumatic disease because it affects the major organs of the body. Valproate is a branched-chain fatty acid, which has been widely used as an antiepileptic in liver cancer therapy. However, this drug can induce fulminant liver failure in patients treated with it. Herein, we prepared the

A new technique STS (from solids to sols) for study of supported metal catalysts by Dynamic Light Scattering (DLS) has been proposed. This technique has been tested on a set of supported gold catalysts with wide range of metal particle sizes. We have prepared a set of Au/Al2O3 catalysts and previously studied them by TEM and XRD. Then using STS technique Au-containing sols were prepared from these

20-Carboxamidopregnene derivatives, such as 3β-acetoxy-5α-pregn-20-ene-20-carboxamides and 5α-pregn-20-ene-20-carboxamides were synthesized from the widely accessible 3β-acetoxy-pregn-5,16-dien-20-one (PDA) using selective hydrogenation, hydrazine and iodoalkene formation, as well as palladium-catalysed aminocarbonylation. The 20-iodo-20-ene derivatives, obtained from the corresponding 20-keto derivatives

Anthocyanins occur naturally in many blue-, purple- and red-colored fruits and vegetables, and are commonly found in the human diet as natural colorants with proven health benefits. This work aimed to find the most efficient solvents for the anthocyanins extraction from natural matrices (chokeberries and black carrots), able to preserve their antioxidant activity. Four different acidified solvents

In this study, a series of new sulfone derivatives containing a sulfonohydrazide moiety were synthesized and their structures were determined using 1H NMR, 13C NMR, and HRMS. Then, the in vitro antibacterial activities against Xanthomonas oryzae pv. oryzae (Xoo) and Xanthomonas axonopodis pv. citri (Xac) were evaluated by performing turbidimeter test. Bioactivity results showed that compound 2-(4-

Oxygen is industrially produced by cryogenic distillation but the process is energy-intensive. Perovskite membranes can provide an economical solution for oxygen production because of low energy input. However, the technology is not commercialized due to one of the challenges which is sealing the membrane at high temperature. Unfortunately, there is no universal sealant that can be used for all perovskite

As a special class of coordinated frameworks comprised of various metal species, Prussian blue analogues (PBAs) have received increasing attention for catalytic applications. Nevertheless, few studies have been performed to investigate catalytic activities of PBAs for hydrogen generation (HG) from NaBH4 hydrolysis. No researches have been implemented to examine effects of different MII and MIII of

In the present study, the microemulsion-assisted co-precipitation method was utilized for the synthesis of the size-controlled silver nanoparticles and PEGylated silver nanoparticles at different pH (10–12). The nanoparticles were characterized by X-ray diffraction, Fourier-transform infra-red spectroscopy, transmission electron microscopy and energy-dispersive X-ray spectroscopy. These particles were

Grimaldiite (α-CrOOH) was precipitated hydrothermally from the CrCl3 aqueous solution in the presence of hexamethylenetetramine (HMTA). The crystallite size of grimaldiite samples was estimated to be ~ 2 nm. Eskolaite (α-Cr2O3) was produced by the calcination of grimaldiite at 500 and 700 °C. FE-SEM images showed amorphous-like aggregates of grimaldiite due to very fine particles (crystallites), whereas

The move towards processes in small and micro devices has been increased recently due to the enhanced heat and mass rate of these devices. One particular area of application is liquid–liquid extraction. The efficiency of the solvent extraction as a result of two-phase flow in an intensified channel highly depends on the flow patterns. In this work, the hydrodynamics of conventional polyethylene glycol

In the present study, a sustainable and efficient deep eutectic solvent (DES)-based ultrasound-assisted extraction method for Sapodilla pulp polyphenols was developed. Seven different DESs prepared using carboxylic acid, polyol and amide were evaluated and compared with an aqueous-organic solvent mixture- acetone–water (50%)- the control used in this study. Low pH and high polarity markedly enhanced

The interest in new emerging pollutants (NEPs) does not only focus on the main compounds but also the degradation or intermediate products. It is important to have an effective primary treatment for the removal/degradation of NEPs from hospital and clinical wastewater to protect the environment. In this study, nifedipine degradation was performed by an electro-oxidation method using titanium-based

The present investigation deals with the synthesis of nickel oxide (NiO)/zinc manganite (ZnMn2O4) nanocomposites (NCs) by a two-step approach. The powder X-ray diffraction (PXRD) pattern revealed the existence of face-centered cubic (FCC) phase of NiO and tetragonal rutile phase structure of ZnMn2O4 in NiO/ZnMn2O4 NCs. The optical properties of NiO/ZnMn2O4NCs have been investigated by the UV-diffuse

In this work, nitrogen-doped bamboo-shaped carbon nanotube (nitrogen-doped CNT) was prepared using the Chemical Vapor Deposition Method (CVD). For the first time, 2-aminopyrimidine (a carbon and nitrogen resources) was used as a precursor over Fe@MgO catalyst and employed in CVD. The prepared CNT was characterized via elemental analysis, Fourier Transform Infrared Spectroscopy (FT-IR), Energy Dispersive

The separation of the binary mixture formic acid–water is difficult by conventional distillation since it forms maximum boiling azeotrope at atmospheric pressure. The separation by altering the column pressure is possible if the pressure has a considerable effect on the azeotropic composition. The previous studies of vapor–liquid equilibrium of binary system formic acid–water have shown that the azeotrope

In this study, a selective separation of tungsten W (VI) from a mixed salt solution was done through a liquid-membrane technology. The transport of W (VI) across the supported liquid membrane was also applied on real sample. Tertiary amine (Tri-n-dodecylamine) was used as an organic carrier and a supported liquid membrane of polypropylene separator (celgard 2400) was used in this experimental work

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