Search Results

• • 18 

    Academic Journals

  • Sort by: sorttype.publication.date.desc Newest sorttype.publication.date.asc Oldest sorttype.relevance Relevance

• Liquid-liquid equilibria of ternary systems of 1-hexene/hexane and extraction solvents

  Authors:Lin Zhu, Fang-Fang Li, Ji-Qin Zhu, and Zhi-Gang LeiFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20162,269 words Report 1520LOlefins and paraffins are important basic chemical raw materials with so similar molecular structure and volatility that their separation is a difficult and energy-consuming process. Liquid-liquid equilibrium (LLE) data...

• Influence of solvents and novel extraction methods on bioactive compounds and antioxidant capacity of Phyllanthus amarus

  Authors:Van Tang Nguyen, Hong Ngoc Thuy Pham, Michael C. Bowyer, Ian A. van Altena, and Christopher J. ScarlettFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20168,398 words Article 1550LPhyllanthus amarus (P. amarus) is a herbal plant used in the treatment of various diseases such as hepatitis, diabetes, and cancer. Efficiency of its bioactive compounds extraction and therefore the biological activity...

• Preparation and characterisation of gelatine hydrogels predisposed to use as matrices for effective immobilisation of biocatalysts

  Authors:Karolina Labus, Aleksandra Drozd, and Anna Trusek-HolowniaFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20165,132 words Report 1440LPhysical, enzymatic and chemical methods were used to develop an efficient procedure for preparing gelatine hydrogels of appropriate strength and elastic properties for applications as enzyme carriers. The...

• Synthesis of butyrate using a heterogeneous catalyst based on polyvinylpolypyrrolidone

  Authors:Song Wang, Qian-Qian Chang, Nazar Shawgi, San-Xi Li, and Lin-Nan ZhangFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20163,096 words Report 1380LA heterogeneous polyvinylpolypyrrolidone supported Brpnsted acidic catalyst ([PVPP-BS]HS[O.sub.4]) was used to synthesize butyrate in this paper. The prepared catalysts were characterized by FT-IR, TG, and FESEM and...

• Chemoenzymatic polycondensation of para-benzylamino phenol

  Authors:Pinar Yildirim, Ersen Gokturk, Ersen Turac, Haci O. Demir, and Ertugrul SahmetliogluFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20164,552 words Report 1380Lpara-Benzylamine substituted oligophenol was synthesized via enzymatic oxidative polycondensation of 4-(benzylamino)phenol (BAP). Polymerization involved only the phenolic moiety without oxidizing the sec-amine...

• Convenient amidation of carboxyl group of carboxyphenylboronic acids

  Author:Julia Nowak-JaryFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20162,239 words Report 1520LThe use of catalysts in the activation of carboxyl groups towards nucleophilic attack and the protection of other functional groups by suitable protecting groups are standard and necessary procedures in amide bond...

• Kinetic study of non-reactive iron removal from iron-gall inks

  Authors:Antonio C.A. da Costa, Fernanda do N. Correa, Gustavo de S. Sant'Anna, Gisele B. Tonietto, Jose Marcus de O. Godoy, Rodrigo de A. Goncalves, et al.From:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20165,759 words Report 1410LThe removal of non-reactive iron for different combinations of [Fe.sup.2+] and tannic acid in iron-gall inks, via calcium phytate solutions, was studied. In parallel, the non-reactive iron removal kinetics was...

• Design, synthesis and anti-mycobacterial evaluation of some new N-phenylpyrazine-2-carboxamides

  Authors:Jan Zitko, Barbora Servusova-Vanaskova, Pavla Paterova, Lucie Navratilova, Frantisek Trejtnar, Jiri Kunes, et al.From:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20165,039 words Report 1430LN-Phenylpyrazine-2-carboxamides (anilides of pyrazinoic acids with simple substituents in various positions) were previously shown to possess significant biological activities in vitro, markedly anti-mycobacterial and...

• Behaviour of selected pesticide residues in blackcurrants (Ribes nigrum) during technological processing monitored by liquid-chromatography tandem mass spectrometry

  Authors:Bozena Lozowicka, Magdalena Jankowska, and Piotr KaczynskiFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20165,724 words Report 1420LIn this experiment, the behaviour of ten pesticides on field-sprayed blackcurrants (Ribes nigrum) after washing, juicing and cooking was investigated. The concentration level changes in two acaricides (fenazaquin,...

• Erratum to "Martyna Rzelewska, Monika Baczynska, Magdalena Regel-Rosocka, Maciej Wisniewski: trihexyl(tetradecyl)phosphonium bromide as extractant for Rh(III), Ru(III) and Pt(IV) from chloride solutions", chemical papers 70 (4) 454-460 (2016)

  Authors:Martyna Rzelewska, Monika Baczynska, Magdalena Regel-Rosocka, and Maciej WisniewskiFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 2016437 words Correction notice 1320LOn page 459 of the original article Rzelewska et al. (2016), incorrect data were provided in the "Conclusions" paragraph. The correct Conclusions are given below. The authors wish to apologise to the readers for this...

• Photocatalytic reduction of nitro aromatic compounds to amines using a nanosized highly active CdS photocatalyst under sunlight and blue LED irradiation

  Authors:Ali Asghar Safari and Foad KazemiFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20163,281 words Report 1520LA variety of aromatic nitro compounds were chemoselectively reduced to the corresponding anilines using conveniently prepared nanosized CdS as a photocatalyst under the sunlight and blue LED irradiation. The results...

• Copper corrosion behaviour in acidic sulphate media in the presence of 5-methyl-1H-benzotriazole and 5-chloro-1H-benzotriazole

  Authors:Zaklina Z. Tasic and Milan M. AntonijevicFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20166,361 words Report 1420LThe influence of 1H-benzotriazole, 5-methyl-1H-benzotriazole and 5-chloro-1H-benzotriazole on copper corrosion in an acidic sulphate medium was studied, as well as the influence of chloride ions on the corrosion...

• Investigation of phytochemicals and antioxidant capacity of selected Eucalyptus species using conventional extraction

  Authors:Deep Jyoti Bhuyan, Quan V. Vuong, Anita C. Chalmers, Ian A. van Altena, Michael C. Bowyer, and Christopher J. ScarlettFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20166,024 words Report 1450LEucalyptus species have found their place in traditional medicine and pharmacological research and they have also been shown to possess a large number of phenolic compounds and antioxidants. The present study sought...

• Erratum to "Adriana Bakalova, Boryana Nikolova-Mladenova, Rossen Buyukliev, Emiliya Cherneva, Georgi Momekov, Darvin Ivanov: synthesis, DFT calculations and characterisation of new mixed Pt(II) complexes with 3-thiolanespiro-5'-hydantoin and 4-thio-1H-tetrahydropyranspiro-5'-hydantoin", chemical papers 70 (1) 93-100 (2016)

  Authors:Adriana Bakalova, Boryana Nikolova-Mladenova, Rossen Buyukliev, Emiliya Cherneva, Georgi Momekov, and Darvin IvanovFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 2016128 words Brief article, Corre... 950LIn the original article Bakalova et al. (2016), an incorrect Fig. 1 was published on page 94. The correct figure is given below. The editor wishes to apologise to the authors and to the readers for this mistake in the...

• A novel intramolecular reversible reaction between the hydroxyl group and isobutenylene chain in a cyclophane-type macrocycle

  Authors:Le Fang, Wei-Tao Gong, Manivannan Kalavathi Dhinakaran, Li Shang, and Gui-Ling NingFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20162,056 words Report 1410LA novel [Hg.sup.2+] ion induced reversible ring contraction was achieved employing the intramolecular reaction of isobutylene with an aromatic hydroxyl group of cyclophane; reversibility of the reaction was facilitated...

• Innovative approach to treating waste waters by a membrane capacitive deionisation system

  Authors:Misa Biro and Darinka Brodnjak VoncinaFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20164,566 words Report 1410LThe application of membrane capacitive deionisation was investigated for treating model water samples and real waste waters from the textile industry. For the pre-treatment of waste waters, nanofiltration was integrated...

• Design of extractive distillation process with mixed entrainer

  Authors:Aleksandra Yu. Sazonova, Valentina M. Raeva, and Alla K. FrolkovaFrom:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20163,325 words Report 1360LThe separation of two systems containing minimum boiling azeotropes (acetone-methanol and tetrahydrofuran (THF)-water) was performed using extractive distillation with a heavy boiling mixed entrainer consisting of two...

• Synthesis of new 5-bromo derivatives of indole and spiroindole phytoalexins

  Authors:Lucia Ocenasova, Peter Kutschy, Jozef Gonda, Martina Pilatova, Gabriela Gonciova, Jan Mojzis, et al.From:Chemical Papers (Vol. 70, Issue 5) Peer-Reviewed

  May 20165,640 words Report 1580LElectrophilic aromatic substitution is one of the most thoroughly studied reactions in organic chemistry. In the present paper, the 5-brominated spirobrassinol methyl ethers VII, VIII were obtained by electrophilic...