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Acta Chimica Slovenica

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https://www.readbyqxmd.com/read/29562116/development-of-a-cotton-smart-textile-with-medicinal-properties-using-lime-oil-microcapsules
#1
B Piyumi Wijesirigunawardana, B Gayani K Perera
The present study focused on using microencapsulation technique to develop an antioxidant and antibacterial active smart cotton fabric using encapsulated lime oil (LO). LO microcapsules were prepared via the complex coacervation method using chitosan and gum arabic wall materials. UV-Visible and FTIR spectrometry verified the successful encapsulation of LO. The synthesized LO microcapsules were irregular in shape and differed in size between 15-160 μm according to the optical and SEM images. The loading of the microcapsules was found to be 2943 ± 128 μL/g with a loading efficiency of 82 ± 4%...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562115/development-of-new-bexarotene-loaded-mesoporous-silica-systems-for-topical-pharmaceutical-formulations
#2
Aurelia Vasile, Maria Ignat, Mirela Fernanda Zaltariov, Liviu Sacarescu, Iulian Stoleriu, Dan Draganescu, Mihai Dumitras, Lacramioara Ochiuz
The present study reports the first time use of MCM-41 mesoporous silica as highly efficient carrier for bexarotene - an antineoplastic agent specific for cutaneous T-cell lymphoma treatment. Bexarotene is highly toxic and poor-water soluble, having low bioavailability in the conventional pharmaceutical forms. Comparative uptake of bexarotene on amino-functionalized silica host at various functionalization degrees is discussed in details taking into account all structural features, of matrix as well as properties of the drug molecules...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562114/prediction-of-in-vivo-bioavailibility-by-in-vitro-characterization-of-ethylenediamine-dipropanoic-acid-derivatives-with-cytotoxic-activity
#3
Biljana K Tubić, Sandra S Vladimirov, Bojan D Marković, Tibor J Sabo
O,O'-diethyl-(S,S)-ethylenediamine-N,N'-di-2-(3-cyclohexyl)propanoate (DE-EDCP) is novel substance with cytotoxic activity in human leukemic cells. The aim of this study has been to predict in vivo bioavailability of the DE-EDCP and its potential metabolite (S,S)-ethylenediamine-N,N'-di-2-(3-cyclohexyl)propanoic acid (EDCP) by in vitro characterization which includes determination of lipophilicity and passive membrane permeability. There has also been evaluated inter-laboratory reproducibility of the bio-analytical method which was previously developed and validated for non-clinical study of the DE-EDCP and EDCP...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562113/preconcentration-and-determination-of-trace-vanadium-v-in-beverages-by-combination-of-ultrasound-assisted-cloud-point-extraction-with-spectrophotometry
#4
Nuket Kartal Temel, Ramazan Gürkan
A novel ultrasound assisted-cloud point extraction method was developed for preconcentration and determination of V(V) in beverage samples. After complexation by pyrogallol in presence of safranin T at pH 6.0, V(V) ions as ternary complex are extracted into the micellar phase of Triton X-114. The complex was monitored at 533 nm by spectrophotometry. The matrix effect on the recovery of V(V) from the spiked samples at 50 μg L-1 was evaluated. In optimized conditions, the limits of detection and quantification of the method, respectively, was 0...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562112/polythiacalix-4-amides-as-a-novel-category-of-macromolecules-synthesis-antibacterial-evaluation-and-investigation-on-their-spectral-and-thermophysical-characteristics
#5
Hamed Tashakkorian, Moslem Mansour Lakouraj, Rahimeh Maldar, Zahra Moulana
Polythiacalix[4]amides as a novel category of polyamides, with high sorption capability towards some environmentally hazardous metal cations, especially Hg2+, have been synthesized via direct polycondensation protocol using a thiacalix[4] arene dicarboxylic acid and commercial diamines. The polyamides were obtained in high yields and possess inherent viscosities in the range of 0.55-0.75 dl/g. The photophysical characteristic was studied by looking for the maximum absorption wavelength of each polymer using UV absorption spectroscopy...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562111/antioxidative-activity-of-methanolic-and-water-extracts-from-the-hyperthermophilic-archaeon-aeropyrum-pernix-k1
#6
Mihaela Skrt, Polona Jamnik, Nataša Poklar Ulrih
The hyperthermophilic archaeon Aeropyrum pernix has adapted to optimal growth under high temperatures in saline environments and under oxidizing conditions. In the present study, we focused on the antioxidative activity of proteins from A. pernix K1. Following high temperature methanol and water extractions of the protein from the biomass of A. pernix K1, the total sulphydryl groups and radical scavenging activities were investigated. The total protein in the methanolic extract was 36% lower and showed 10% fewer sulphydryl groups than that from the water extract...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562110/biosorption-of-2-4-6-trichlorophenol-from-aqueous-medium-using-agro-waste-pine-pinus-densiflora-sieb-bark-powder
#7
Nadavala Siva Kumar, Mohammad Asif, Mansour I Al-Hazzaa, Ahmed A Ibrahim
Most industrial waste discharges are often contaminated with phenolic compounds, which constitute a major source of water pollution owing to their toxicity and low biodegradability. Development of cost-effective treatment of such industrial wastewater is therefore of paramount importance. Towards this end, we explore the efficacy of Pine bark powder (PBP), which is an agricultural solid waste material, as a low-cost biosorbent without any pre-treatment, for the adsorptive removal of 2,4,6-trichlorophenol (2,4,6-TCP) from aqueous media...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562109/effect-of-chemical-pre-treatments-on-bioethanol-production-from-chlorella-minutissima
#8
Burcu Şerbetçioğlu Sert, Benan İnan, Didem Özçimen
In recent years, algal bioethanol production comes into prominence as a trend towards sustainable development. Due to being sustainable energy source and environmental friendly, bioethanol production from algae is becoming increasingly popular all over the world. However, yield of bioethanol production from algae is lower than first generation feedstock's currently, and needs to be improved. In order to increase bioethanol yield, pre-treatments should be performed as cell disruption process on algal biomass...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562108/ultrasound-assisted-1-4-diazabicyclo-2-2-2-octaniumdiacetate-multicomponent-synthesis-of-benzodiazepines-a-novel-highly-efficient-and-green-protocol
#9
Shahriar Sarhandi, Leila Zare Fekri, Esmaei Vessaly
A simple and efficient method is presented for the synthesis of benzodiazepines through the multicomponent reaction of o-phenylenediamine, various aldehydes and 5,5-dimethylcyclohexane-1,3-dione (dimedone) in the presence of the acidic bis ionic liquid 1,4-diazabicyclo[2.2.2]octanium diacetate under ultrasound irradiation. The ionic liquid used is recoverable and reusable. This procedure is simple and environmentally friendly, and offers easy work-up, mild conditions and excellent yield in a short reaction time...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562107/thermochemical-properties-and-regularities-of-amides-anilides-and-amidic-acids
#10
Alma Kairlapovna Ryskaliyeva, Murat Ergalievich Baltabayev, Aigul Moldakhmetovna Zhubatova
The thermodynamic properties of carbamide and its alkyl substituted were studied insufficiently. In this article, the enthalpies of combustion of ΔсН of some amides, anilides and amidic acids have been determined experimentally; their standard enthalpies of formation have been calculated. Linear dependences between the average atomic enthalpy of combustion of ΔcH amides and their basicity constants in acidic aqueous solutions of pKBH + have been established; a correlation that relates the enthalpies of combustion of amides and the corresponding amidic acids has been found...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562106/synthesis-and-anti-proliferative-activity-of-4h-chromone-based-phenylhydrazones-pyrazolecarboxylates-and-pyrazolylmethanones
#11
Nageswara Rao Rayala, Rajkumar Kommera, Dayakar Cherupally, Ramalinga Murthy Thampunuri, V Kalivendi Shasi, China Raju Bhimapaka
Series of 4H-chromone-based hydrazones 3a-z, pyrazolecarboxylates 5a-x and pyrazolylmethanones 6a-u were prepared and screened for their anti-proliferative activity on A549, HeLa, DU145 and MDAMB 231 cell lines. The hydrazone compound 3s with a chloro substituent on the chromanone moiety and a methoxy group on the phenyl ring displayed promising activity on A549, HeLa and DU145 cell lines. The compound 5p with a bromo substituent on the chromanone moiety and a methyl group on the phenyl ring displayed potent activity on DU145...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562105/a-comparative-study-on-a-cationic-dye-removal-through-homogeneous-and-heterogeneous-fenton-oxidation-systems
#12
Shima Rahim Pouran, Abolfazl Bayrami, Mohammad Saleh Shafeeyan, Abdul Aziz Abdul Raman, Wan Mohd Ashri Wan Daud
Oxidative treatment of a cationic dye solution, methylene blue, was investigated using magnetite nanoparticles and goethite in heterogeneous Fenton-like reaction, and ferrous ions in homogeneous Fenton-reaction. The aim was to compare the degradation efficiencies of the studied catalysts for decolorization of methylene blue solution as the model organic pollutant. Response surface methodology (RSM) was applied to determine the optimal operational conditions for magnetite/H2O2 and goethite/H2O2 systems. The [H2O2] of 0...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562104/diaquabis-2-2-dipyridylamine-m-ii-terephthalate-dihydrates-m-ii-ni-co-synthesis-crystal-structures-thermal-and-magnetic-properties
#13
Lidija Radovanović, Jelena Rogan, Dejan Poleti, V Marko Rodić, Zvonko Jagličić
Two new isostructural M(II) (M = Ni, Co) complexes with 2,2'-dipyridylamine (dipya) and dianion of terephthalic acid (H2tpht), [M(dipya)2(H2O)2](tpht) ∙ 2H2O, have been synthesized by ligand exchange reaction and characterized by single-crystal X-ray diffraction, FTIR spectroscopy, TG/DSC analysis and magnetic measurements. The crystal structures of [M(dipya)2(H2O)2](tpht) ∙ 2H2O consist of discrete complex units in which M(II) adopts deformed octahedral geometries. Two dipya ligands and two water molecules are coordinated to M(II) atom, tpht acts as a counter ion, while additional two water molecules remained uncoordinated...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562103/synthesis-and-in-vitro-bio-activity-evaluation-of-n4-benzyl-substituted-5-chloroisatin-3-thiosemicarbazones-as-urease-and-glycation-inhibitors
#14
Humayun Pervez, Nazia Khan, Jamshed Iqbal, Sumera Zaib, Muhammad Yaqub, Muhammad Moazzam Naseer
A series of fifteen N4-benzyl substituted 5-chloroisatin-3-thiosemicarbazones 5a-o were synthesized and screened mainly for their antiurease and antiglycation effects. Lemna aequinocitalis growth and Artemia salina assays were carried out to determine their phytotoxicity and cytotoxicity potential. All the compounds proved to be extremely effective urease inhibitors, demonstrating enzyme inhibition much better than the reference inhibitor, thiourea (IC50 values 1.31 ± 0.06 to 3.24 ± 0.15 vs. 22.3 ± 1.12 μM)...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562102/b3lyp-study-of-3-hydroxynaphthalene-2-carboxanilide-para-derivatives
#15
Martin Michalík, Peter Poliak, Vladimír Lukeš
A systematic DFT investigation of 3-hydroxy-N-phenylnaphthalene-2-carboxamide and its sixteen para-derivatives is presented. The structural analysis showed that the energetically preferred conformation of all derivatives is practically planar and it is stabilised via intramolecular hydrogen bonds occurring between (C)O...H(3)O atomic pairs. The quantum chemically evaluated partition coefficients logarithms correlate well with Quantitative Structure-Activity Relationship models as well as with experimentally determined isocratic retention factors logarithm...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562101/study-on-the-chelate-formation-and-the-ion-association-of-anionic-chelate-of-molybdenum-vi-with-3-5-dinitrocatechol-and-monotetrazolium-cation
#16
Kirila Stojnova, Vidka Divarova, Petya Racheva, Kristina Bozhinova, Vanya Lekova
The equilibria of the chelate formation and ion-association in the liquid-liquid extraction system Mo(VI)‒3,5-DNC‒INT‒H2O‒CHCl3 were studied by spectrophotometry. The optimum conditions for the chelate formation and extraction of the ion-associated complex formed between the anionic chelate of Mo(VI)‒3,5-dinitrocatechol (3,5-DNC) and the cation of 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-phenyl-2H-tetrazolium chloride (INT) were established. The validity of Beer's law was checked and some analytical characteristics were calculated...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562100/recent-developments-and-biological-activities-of-2-aminothiazole-derivatives
#17
REVIEW
Mohamed Ezzat Khalifa
Aminothiazole nuclei and their various derivatives have been long used as precursors for the synthesis of biologically active molecules. As a typical heterocyclic amine, 2-aminothiazole is a cornerstone for the synthesis of many compounds, including sulfur drugs, biocides, fungicides, various types of dyes for synthetic fibers and chemical reaction accelerators and as intermediates in the synthesis of antibiotics, where a large number of 2-aminothiazoles have been substituted with different groups for various pharmaceutical purposes, besides their activity as corrosion inhibitors for mild steel protection as well...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562099/effect-of-fluorinated-ligand-on-structural-electronic-and-dna-binding-properties-of-copper-paddlewheel-complex-synthesis-structure-and-properties
#18
Muhammad Iqbal, Sqib Ali, Muhammad Nawaz Tahir
This paper presents synthesis, structural description and properties of a binuclear paddlewheel copper(II) carboxylate complex with formula [(py)Cu(μ-L)4Cu(py)], where py = pyridine and L = 4-fluorophenylacetate. Structural characteristics, electronic absorption and DNA-binding properties of the synthesized complex have been compared to those of the non-fluorinated analogues (where F is replaced by H, -CH3 and -OCH3) already reported and the modifications successfully ascribed to fluorine. The complex exhibits typical paddlewheel structure and there are two crystallographically independent molecules in the unit cell...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562098/synthesis-and-antibacterial-evaluation-of-some-new-1-4-dihydropyridines-in-the-presence-of-fe3o4-silica-sulfonic-acid-nanocomposite-as-catalyst
#19
Seyed Mostafa Hasan Nasrollahi, Mohammad Ali Ghasemzadeh, Mohammad Reza Zolfaghari
The synthesis of heterocyclic compounds has been a topic of significant interest because of their broad applications. In this research an effective and eco-friendly approach for the synthesis 1,4-dihydropyridines has been developed via the four-component reactions of arylamines, acetylenedicarboxylates, aromatic aldehydes and ethyl acetoacetate in the presence of Fe3O4@SiO2@OSO3H nanocomposite under solvent-free conditions. The advantages of this method involve the green reaction conditions, simple workup, broad substrates, excellent yields and the reuse of the nanocatalyst...
March 2018: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29562097/spectroscopic-structural-and-density-functional-theory-dft-studies-of-two-oxazol-5-one-derivatives
#20
İbrahim Hanif Nazlı, Duygu Barut Celepci, Gül Yakalı, Derya Topkaya, Muhittin Aygün, Serap Alp
In this study, two oxazol-5-one derivatives, C20H20N2O2 (1) and C21H22N2O2 (2), were synthesized by getting condensed p-N,N-diethylaminobenzaldehyde with two presented hippuric acid derivatives and in further studies they were analysed spectrochemically. Molecular and crystal structures of the compounds were determined by single-crystal X-ray diffraction and the results revealed that the molecular packing of the crystal structures were stabilized by weak intraand intermolecular interactions also with C-O∙∙∙π, C-H∙∙∙π and π∙∙∙π stacking interactions...
March 2018: Acta Chimica Slovenica
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