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  Subjects -> CHEMISTRY (Total: 891 journals)
    - ANALYTICAL CHEMISTRY (55 journals)
    - CHEMISTRY (621 journals)
    - CRYSTALLOGRAPHY (21 journals)
    - ELECTROCHEMISTRY (28 journals)
    - INORGANIC CHEMISTRY (45 journals)
    - ORGANIC CHEMISTRY (51 journals)
    - PHYSICAL CHEMISTRY (70 journals)

CHEMISTRY (621 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 14)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26)
ACS Catalysis     Full-text available via subscription   (Followers: 43)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 21)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 23)
ACS Macro Letters     Full-text available via subscription   (Followers: 26)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 41)
ACS Nano     Full-text available via subscription   (Followers: 274)
ACS Photonics     Full-text available via subscription   (Followers: 14)
ACS Symposium Series     Full-text available via subscription  
ACS Synthetic Biology     Full-text available via subscription   (Followers: 24)
Acta Chemica Iasi     Open Access   (Followers: 5)
Acta Chimica Slovaca     Open Access   (Followers: 2)
Acta Chimica Slovenica     Open Access   (Followers: 1)
Acta Chromatographica     Full-text available via subscription   (Followers: 9)
Acta Facultatis Medicae Naissensis     Open Access  
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 7)
Acta Scientifica Naturalis     Open Access   (Followers: 3)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 6)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 9)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 6)
Advanced Functional Materials     Hybrid Journal   (Followers: 57)
Advanced Science Focus     Free   (Followers: 5)
Advances in Chemical Engineering and Science     Open Access   (Followers: 66)
Advances in Chemical Science     Open Access   (Followers: 18)
Advances in Chemistry     Open Access   (Followers: 21)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 19)
Advances in Drug Research     Full-text available via subscription   (Followers: 23)
Advances in Environmental Chemistry     Open Access   (Followers: 5)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 9)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 17)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 11)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 25)
Advances in Nanoparticles     Open Access   (Followers: 15)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 16)
Advances in Polymer Science     Hybrid Journal   (Followers: 43)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 19)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 6)
Advances in Science and Technology     Full-text available via subscription   (Followers: 12)
African Journal of Bacteriology Research     Open Access  
African Journal of Chemical Education     Open Access   (Followers: 3)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 7)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Al-Kimia : Jurnal Penelitian Sains Kimia     Open Access  
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 2)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 64)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 17)
American Journal of Chemistry     Open Access   (Followers: 30)
American Journal of Plant Physiology     Open Access   (Followers: 11)
American Mineralogist     Hybrid Journal   (Followers: 15)
Analyst     Full-text available via subscription   (Followers: 38)
Angewandte Chemie     Hybrid Journal   (Followers: 165)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 244)
Annales UMCS, Chemia     Open Access  
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 5)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 3)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 4)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 9)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 12)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 13)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Hybrid Journal   (Followers: 2)
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 9)
Applied Spectroscopy     Full-text available via subscription   (Followers: 23)
Applied Surface Science     Hybrid Journal   (Followers: 31)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 1)
Asian Journal of Biochemistry     Open Access   (Followers: 2)
Atomization and Sprays     Full-text available via subscription   (Followers: 4)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 2)
Avances en Quimica     Open Access  
Biochemical Pharmacology     Hybrid Journal   (Followers: 10)
Biochemistry     Full-text available via subscription   (Followers: 350)
Biochemistry Insights     Open Access   (Followers: 6)
Biochemistry Research International     Open Access   (Followers: 6)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 10)
Bioinspired Materials     Open Access   (Followers: 5)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 2)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access   (Followers: 2)
Biomacromolecules     Full-text available via subscription   (Followers: 21)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 3)
BioNanoScience     Partially Free   (Followers: 5)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 128)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 84)
Bioorganic Chemistry     Hybrid Journal   (Followers: 10)
Biopolymers     Hybrid Journal   (Followers: 18)
Biosensors     Open Access   (Followers: 2)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 2)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 2)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 24)
Bulletin of the Korean Chemical Society     Hybrid Journal   (Followers: 1)
C - Journal of Carbon Research     Open Access   (Followers: 3)
Cakra Kimia (Indonesian E-Journal of Applied Chemistry)     Open Access  
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 2)
Canadian Journal of Chemistry     Hybrid Journal   (Followers: 10)
Canadian Mineralogist     Full-text available via subscription   (Followers: 6)
Carbohydrate Research     Hybrid Journal   (Followers: 26)
Carbon     Hybrid Journal   (Followers: 71)
Catalysis for Sustainable Energy     Open Access   (Followers: 8)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
Catalysis Science and Technology     Free   (Followers: 8)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 10)
Cellulose     Hybrid Journal   (Followers: 7)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 1)
ChemCatChem     Hybrid Journal   (Followers: 8)
Chemical and Engineering News     Free   (Followers: 18)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 73)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 26)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Full-text available via subscription   (Followers: 22)
Chemical Reviews     Full-text available via subscription   (Followers: 191)
Chemical Science     Open Access   (Followers: 24)
Chemical Technology     Open Access   (Followers: 24)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 5)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 56)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 24)
ChemInform     Hybrid Journal   (Followers: 8)
Chemistry & Biodiversity     Hybrid Journal   (Followers: 7)
Chemistry & Biology     Full-text available via subscription   (Followers: 32)
Chemistry & Industry     Hybrid Journal   (Followers: 7)
Chemistry - A European Journal     Hybrid Journal   (Followers: 163)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 16)
Chemistry and Materials Research     Open Access   (Followers: 21)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry Education Research and Practice     Free   (Followers: 5)
Chemistry in Education     Open Access   (Followers: 9)
Chemistry International     Hybrid Journal   (Followers: 2)
Chemistry Letters     Full-text available via subscription   (Followers: 44)
Chemistry of Materials     Full-text available via subscription   (Followers: 254)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 9)
Chemistry World     Full-text available via subscription   (Followers: 19)
Chemistry-Didactics-Ecology-Metrology     Open Access   (Followers: 1)
ChemistryOpen     Open Access   (Followers: 1)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
Chemoecology     Hybrid Journal   (Followers: 4)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 14)
Chemosensors     Open Access  
ChemPhysChem     Hybrid Journal   (Followers: 11)
ChemPlusChem     Hybrid Journal   (Followers: 2)
ChemTexts     Hybrid Journal  
CHIMIA International Journal for Chemistry     Full-text available via subscription   (Followers: 2)
Chinese Journal of Chemistry     Hybrid Journal   (Followers: 6)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 11)
Chromatographia     Hybrid Journal   (Followers: 24)
Chromatography     Open Access   (Followers: 2)
Chromatography Research International     Open Access   (Followers: 6)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Cogent Chemistry     Open Access   (Followers: 1)
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 11)
Colloids and Interfaces     Open Access  
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 6)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 4)
Combustion Science and Technology     Hybrid Journal   (Followers: 22)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 2)
Communications Chemistry     Open Access  
Composite Interfaces     Hybrid Journal   (Followers: 7)
Comprehensive Chemical Kinetics     Full-text available via subscription   (Followers: 1)
Comptes Rendus Chimie     Full-text available via subscription  
Comptes Rendus Physique     Full-text available via subscription   (Followers: 1)
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 9)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 11)
Computational Chemistry     Open Access   (Followers: 2)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 10)
Coordination Chemistry Reviews     Full-text available via subscription   (Followers: 3)
Copernican Letters     Open Access   (Followers: 1)
Corrosion Series     Full-text available via subscription   (Followers: 6)
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 5)
Croatica Chemica Acta     Open Access  
Crystal Structure Theory and Applications     Open Access   (Followers: 4)
CrystEngComm     Full-text available via subscription   (Followers: 13)
Current Catalysis     Hybrid Journal   (Followers: 2)
Current Chromatography     Hybrid Journal  
Current Green Chemistry     Hybrid Journal  
Current Metabolomics     Hybrid Journal   (Followers: 5)
Current Microwave Chemistry     Hybrid Journal  
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 9)
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 14)
Current Research in Chemistry     Open Access   (Followers: 8)
Current Science     Open Access   (Followers: 69)
Current Trends in Biotechnology and Chemical Research     Open Access   (Followers: 3)
Dalton Transactions     Full-text available via subscription   (Followers: 23)
Detection     Open Access   (Followers: 2)
Developments in Geochemistry     Full-text available via subscription   (Followers: 2)
Diamond and Related Materials     Hybrid Journal   (Followers: 12)
Dislocations in Solids     Full-text available via subscription  

        1 2 3 4 | Last

Journal Cover
BioNanoScience
Journal Prestige (SJR): 0.308
Citation Impact (citeScore): 1
Number of Followers: 5  
 
  Partially Free Journal Partially Free Journal
ISSN (Print) 2191-1630 - ISSN (Online) 2191-1649
Published by Springer-Verlag Homepage  [2350 journals]
  • Neural Network Self-Learning Model for Complex Assessment of Drinking
           Water Safety for Consumers
    • Authors: Yulia Tunakova; Svetlana Novikova; Ivan Krasnyuk; Rashat Faizullin; Gulnara Gabdrakhmanova
      Pages: 504 - 510
      Abstract: We need to take into complex assessment a set of influencing factors of drinking water safety. This raises the task of developing an integrated methodology assessing the safety of drinking water that reaches the consumers. For the integrated assessment of the safety of drinking water, the method of clustering was chosen, namely, the neural network method of Kohonen self-organizing maps. Zones were separated by the method of cluster neural network analysis. The zones are characterized by different content of metal cations in drinking water, levels of carcinogenic and non-carcinogenic risk to the health of the child population, and the probability of the receipt of metal cations with potable water to consumers.
      PubDate: 2018-06-01
      DOI: 10.1007/s12668-017-0486-z
      Issue No: Vol. 8, No. 2 (2018)
       
  • Towards Tissue Engineering: 3D Study of Polyamide-6 Scaffolds
    • Authors: A. A. Mikhutkin; R. A. Kamyshinsky; T. Kh. Tenchurin; А. D. Shepelev; A. S. Orekhov; T. E. Grigoriev; V. G. Mamaguashvili; S. N. Chvalun; A. L. Vasiliev
      Pages: 511 - 521
      Abstract: The paper reports confocal laser scanning microscopy and scanning electron microscopy complex study of polyamide-6 scaffolds for tissue engineering. Various approaches of 3D reconstruction and analysis of porous space and fibrous structure are presented. The effective porosity and cell penetration into the scaffold are estimated, assuming the spherical shape of cells. These results are compared with the data, obtained by bubble point method. The average diameter of the fibers was estimated using both skeletonization and manual approach, and it was within the range of 3.4–4.1 μm. Cell penetration modeling revealed that the effective volume of the porous space depends on the size of the penetrating sphere, decreasing from nearly 90% for 6-μm sphere to 0.2% for 24-μm one. The influence of experimental conditions, namely 405, 473, 559, and 635-nm laser wavelength, different step sizes during laser scanning and media (distilled water, glycerol 70%, glycerol 90%, glycerol 100%, and cultural fluid RPMI-1648), on the results obtained by confocal laser scanning microscopy is considered. It was found strong dependence of laser wavelength on image quality.
      PubDate: 2018-06-01
      DOI: 10.1007/s12668-017-0493-0
      Issue No: Vol. 8, No. 2 (2018)
       
  • Positively Charged Gold Nanoparticles for Hydrogen Peroxide Detection
    • Authors: Mohammad Mansoob Khan; Moo Hwan Cho
      Pages: 537 - 543
      Abstract: This paper reports the synthesis of positively charged gold nanoparticles [(+)AuNPs] for the colorimetric detection of hydrogen peroxide (H2O2). (+)AuNPs were synthesized using an electrochemically active biofilm in an aqueous solution, which is a novel, simple, and green approach. The as-synthesized (+)AuNPs were characterized by ultraviolet-visible (UV-Vis) spectroscopy, dynamic light scattering (DLS), X-ray diffraction (XRD), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM). UV-Vis spectroscopy confirmed the synthesis of AuNPs and DLS showed that the as-synthesized AuNPs had a charge of +32.72 mV. XRD confirmed the formation of AuNPs as well as the purity, crystallinity, and fcc structure. TEM and HRTEM showed that (+)AuNPs were 15–21 nm in size and spherical in shape. The as-synthesized (+)AuNPs were used for the colorimetric detection of H2O2 using 3,3,5,5-tetramethylbenzidine dihydrochoride. This study provides a simple, fast, and sensitive colorimetric method for the detection of H2O2 in the linear range from 1.0 × 10−3 to 2.5 × 10−3 M. The (+)AuNPs possessed extraordinary intrinsic peroxidase-like activity (peroxidase mimic) compared to citrate-capped negatively charged AuNPs. This approach to the colorimetric detection of H2O2 is novel and simple because it uses positively charged gold nanoparticles, which may provide new areas for further research.
      PubDate: 2018-06-01
      DOI: 10.1007/s12668-018-0503-x
      Issue No: Vol. 8, No. 2 (2018)
       
  • Antibacterial and Antibiofilm Potential of Green Synthesized Silver
           Nanoparticles against Imipenem Resistant Clinical Isolates of P.
           aeruginosa
    • Authors: Syed Ghazanfar Ali; Mohammad Azam Ansari; Haris M. Khan; Mohammad Jalal; Abbas Ali Mahdi; Swaranjit Singh Cameotra
      Pages: 544 - 553
      Abstract: Green chemistry is generating an increasing amount of interest for the synthesis of metal nanoparticles due to the cost-effectiveness and eco-friendly nature of the plants. The green approach of nanoparticle synthesis is a better substitute for the chemical and physical methods since there is no involvement of toxic chemicals. The objective of the present research was the synthesis of silver nanoparticles (AgNPs) using bark extract of the medicinal plant Holarrhena pubescens Wall ex G. Don (HP) and evaluating their antibacterial and antibiofilm properties against clinical isolates of P. aeruginosa. The HP-AgNPs were characterized by ultraviolet-visible spectroscopy, Fourier transform infra red, atomic force microscopy, and transmission electron microscopy (TEM). The synthesized HP-AgNPs were spherical in shape, and the average particle size as analyzed by TEM was 13.15 nm. The antibacterial potential of HP-AgNPs was evaluated by determining MIC (minimum inhibitory concentration) and MBC (minimum bactericidal concentration). The MIC was found to be in the range of 20–25 μg/ml. Further, the interaction of AgNPs with imipenem-resistant P. aeruginosa was analyzed by TEM. The rupturing of the cell membrane and cell wall was seen at the lethal concentration, and the nanoparticles entered the cell from the several sites that caused great damage to the cell which eventually led to cell death. The antibiofilm properties of HP-AgNPs against imipenem-resistant P. aeruginosa were demonstrated by CLSM (confocal laser scanning microscopy) using propidium iodide and ConA-FITC dye. CLSM images clearly show that as the concentration of HP-AgNPs increased, the number of biofilm-forming cells decreased due to the cell death. It was also observed that AgNPs inhibit or restrict the colonization and halts the formation of biofilm. The result obtained suggested that green-synthesized HP-AgNPs have great antibacterial and antibiofilm potential and could be used as an alternative agent to treat the infection caused by imipenem-resistant P. aeruginosa.
      PubDate: 2018-06-01
      DOI: 10.1007/s12668-018-0505-8
      Issue No: Vol. 8, No. 2 (2018)
       
  • The Langmuir Technique Applied to the Study of Natural Tears
    • Authors: E. Guaus; J. Torrent-Burgués
      Pages: 559 - 565
      Abstract: As a new proposal, natural tears collected from the Schirmer strips were studied using surface pressure-area, π-A, isotherms obtained with the Langmuir technique. Parameters such as limit surface pressure, πlimit, elastic modulus at the maximum, CS−1max, and surface pressure at the maximum, πmax, were correlated with clinical tests, such as the Schirmer (SCH) and the tear film breakup-time (TFBUT) tests. The analysis from the chi-square test indicates dependence between the SCH test and the type of isotherms with a value of P < 0.05. A moderate Pearson correlation coefficient with statistical significance (P < 0.05) between the values of the SCH test and the πlimit was obtained. On the other hand, a low Pearson correlation coefficient with no statistical significance (P > 0.05) between the values of the TFBUT test and the πlimit was obtained. Additionally, considering only the isotherms classified as good, moderate Pearson correlation coefficients with statistical significance (P < 0.05) between the values of the TFBUT test and πlimit or πmax can be obtained. This study shows that the isotherms obtained with the Langmuir technique correlate well with the tear secretion, and when the later is moderate or good, the isotherm parameters afford information about the tear film stability and the behaviour of the tear lipids.
      PubDate: 2018-06-01
      DOI: 10.1007/s12668-018-0509-4
      Issue No: Vol. 8, No. 2 (2018)
       
  • Morphological and Biomolecules Dynamics of Phytopathogenic Fungi Under
           Stress of Silver Nanoparticles
    • Authors: Magdah Ganash; T. M. Abdel Ghany; A. M. Omar
      Pages: 566 - 573
      Abstract: Antifungal impact of silver nanoparticles (AgNPs) was evaluated on the growth, morphological, and biomolecules dynamics of Fusarium culmorum and Alternaria alternata. It was revealed that the different concentrations of AgNPs caused inhibition of fungal growth and deformations of fungal structures especially at high concentrations 40 and 60 ppm of AgNPs. A. alternata conidiospores at 40 ppm of AgNPs was sharply deformed and their longitudinal sections disappeared. On the other hand, these fungi failed to produce conidiospores in the presence of 60 ppm of AgNPs but produced chlamydospores. The effect of AgNPs on amino and fatty acids of F. culmorum was investigated compared with the influence of silver nitrate (AgNO3). AgNPs at different applied concentrations stimulated the synthesis of the most detected amino acids including aspartic acid, threonine, serine, glutamic acid, glycine, alanine, valine, leucine, tyrosine, arginine, proline, and lysine. The concentration of detected amino acids increased with increasing AgNPs up to 60 ppm. Aspartic acid, serine, glycine, alanine, arginine, leucine, and proline concentrations were 11.52, 6.53, 21.51, 12.51, 27.34, 9.40, and 22.17 μg/ml compared with their concentrations 5.90, 0.34, 21.51, 12.51, 14.97, 6.86, and 9.91 μg/ml at 40 ppm of AgNPs and AgNO3, respectively. Numerous fatty acids were detected in low percentage in treated F. culmorum with AgNO3 or AgNPs compared with untreated (control). Only butyric was detected in high percentage (29.58 and 33.04% at 20 ppm of AgNPs and AgNO3, respectively) compared with their percentage 15.93% in control.
      PubDate: 2018-06-01
      DOI: 10.1007/s12668-018-0510-y
      Issue No: Vol. 8, No. 2 (2018)
       
  • Creation of Optimal Combinations of Biosorbents to Eliminate Excessive
           Amounts of Metals from the Human Body
    • Authors: Yulia A. Tunakova; Rashat I. Faizullin; Vsevolod S. Valiev; Gulnara N. Gabdrakhmanova
      Pages: 574 - 580
      Abstract: Results of the development and evaluation of a sorption capacity of several polymer biosorbents combined with an inorganic matrix are provided. The potential use of whey to model sorption processes in an internal environment of the body is shown. Most effective combinations promoting selective elimination of an excess of accumulated metals from the body are proposed.
      PubDate: 2018-06-01
      DOI: 10.1007/s12668-018-0511-x
      Issue No: Vol. 8, No. 2 (2018)
       
  • Antihepatotoxic Activity of Liposomal Silibinin
    • Authors: Sergey V. Lutsenko; Tatiana I. Gromovykh; Ivan I. Krasnyuk; Ivan A. Vasilenko; Nataliya B. Feldman
      Pages: 581 - 586
      Abstract: The liposomal form of silibinin was obtained, and its antihepatotoxic activity in mice was studied using a model of acute toxic hepatitis caused by injection of carbon tetrachloride or paracetamol. It was shown that the use of the drug in therapy or prevention regimens leads to normalization of levels of transaminases and total protein in the blood of experimental animals. The results of the study showed that liposomal silibinin when administered intravenously shows a more pronounced hepatoprotective effect compared to intragastric administration of free silibinin. Thus, the effectiveness of the therapeutic action of silibinin can be significantly increased by using its liposomal form. Liposomal drug, in contrast to native silibinin, can be injected directly into the blood that significantly increases its bioavailability.
      PubDate: 2018-06-01
      DOI: 10.1007/s12668-018-0512-9
      Issue No: Vol. 8, No. 2 (2018)
       
  • Antibacterial and Antioxidant Activity of Different Staged Ripened Fruit
           of Capsicum annuum and Its Green Synthesized Silver Nanoparticles
    • Authors: Antony V. Samrot; N. Shobana; Rashmi Jenna
      Pages: 632 - 646
      Abstract: Functional metabolites are believed to possess different bioactivities; thus, three different stages of ripened fruit (green, yellow, red) of Capsicum annuum were collected from Chennai, Tamil Nadu, India, and were used in this study. The aqueous extract of Capsicum annuum was screened for various phytochemical compounds and subjected to TLC bioautography and antibacterial and antioxidant activities. The aqueous extract of yellow-colored Capsicum annuum showed the highest antibacterial activity against Pseudomonas aeruginosa and also showed the highest antioxidant activity. Furthermore, silver nanoparticles were synthesized using the aqueous extract and characterized by UV-Vis, FTIR, SEM, and AFM analysis. The silver nanoparticles were investigated for its bactericidal activity. The silver nanoparticles produced using the extract of green-colored Capsicum annuum showed the highest bactericidal activity which was evidenced by protein leakage assay.
      PubDate: 2018-04-28
      DOI: 10.1007/s12668-018-0521-8
      Issue No: Vol. 8, No. 2 (2018)
       
  • Surface Structure and Adsorption Characteristics of COOH-Functionalized
           Multi-Wall Carbon Nanotubes
    • Authors: Dmitry S. Muratov; Roman A. Stolyarov; Sergey V. Gromov
      Pages: 668 - 674
      Abstract: Carbon-based nanomaterials with functionalized surface are widely used in water treatment, agriculture, hydrogen storage, and biology. The current study deals with characterization of engineered multi-wall carbon nanotubes (MWCNT) prior and after chemical modification in nitric acid for 1 and 2 h. It was shown that MWCNT surface area increased from 70 m2/g (pristine material) to 149 m2/g after 2 h modification, and the surface became hydrophilic. According to back-titration method the functional surface group concentration increased almost three times after 2 h treatment compared to 1 h modification. The results of thermogravimetric analysis (TGA) have shown good correspondence with functional COOH-group concentration of samples. Total pore volume and specific surface area were calculated using non-local density functional theory (NLDFT) and Brunaeur-Emmet-Teller (BET) models. Studied functionalized MWCNTs form stable water dispersions and show great potential for biological agricultural applications.
      PubDate: 2018-06-01
      DOI: 10.1007/s12668-017-0442-y
      Issue No: Vol. 8, No. 2 (2018)
       
  • Highly Sensitive Enzymatic MWCNTs-Based Biosensors for Detection of
           Abiraterone in Human Serum
    • Authors: Nima Aliakbarinodehi; Giovanni De Micheli; Sandro Carrara
      Pages: 675 - 679
      Abstract: A highly sensitive enzymatic biosensor is successfully experimented for detection of abiraterone in human serum with significance in personalized medicine and point-of-care chemotherapy of patients with metastatic prostate cancer. The dynamic range and limit of the detection of the proposed biosensor coincide with the therapeutic range of abiraterone in circulatory system of patients (below 1 μM). An optimized label-free electrochemical biosensor was exploited in order to improve the performance of biosensor to detect low concentrations of abiraterone in human serum. Electroactive surface area has been increased by 4314 mm2 by multiwalled carbon nanotubes (MWCNTs) nanostructuring with respect to bare electrode to enhance the sensitivity. CYP3A4 protein was immobilized on MWCNTs as probe biomolecule. Electrochemical cyclic voltammetries demonstrated an inhibition effect on the CYP3A4, clearly observed as a diminished electrocatalytic activity of the enzyme. Dose-response behavior of biosensor in interaction with abiraterone in human serum samples is demonstrated that shows a dynamic range between zero and 1 μM and a detection limit of 230 nM.
      PubDate: 2018-06-01
      DOI: 10.1007/s12668-017-0393-3
      Issue No: Vol. 8, No. 2 (2018)
       
  • Prostate-Specific Antigen: a Review of Assay Techniques, Variability and
           Their Clinical Implications
    • Authors: N. Gill; S. Zouwail; H. Joshi
      Pages: 707 - 712
      Abstract: Prostate-specific antigen (PSA) is used worldwide in the detection and management of prostate cancer. Its discovery revolutionised the care of patients with prostate cancer, but there remains a question of why inter-assay variability exists and how significantly this affects the decision-making process in the care of patients with the disease. We conducted a literature review to evaluate the two areas: inter-assay variability and its relation to clinical practice. Our results show there are internationally recognised standard assays, and the variability of assays are reliant on local/national calibration to a set standard preparation and rely on the measurement of different isoforms of PSA on an equimolar basis. Inter-assay variability exists and can be as high as 8%, which has differing impacts on decision making for diagnostic procedures and treatment modalities depending on the clinical circumstances and PSA level.
      PubDate: 2018-06-01
      DOI: 10.1007/s12668-017-0465-4
      Issue No: Vol. 8, No. 2 (2018)
       
  • Studying of Surfactant Excess Separation from Non-aqueous Quantum Dots
           Solution on its Monolayer Formation Process
    • Authors: Ammar J. Al-Alwani; K. I. Kosolapova; A. S. Chumakov; V. O. Lukyanova; I. A. Gorbachev; А. V. Kazak; А. I. Smirnova; S. N. Shtykov; N. V. Usol’tseva; E. G. Glukhovskoy
      Abstract: Controlled purification of non-aqueous solution of CdSe/CdS/ZnS quantum dots (QD) (dispersed in toluene or chloroform) from an excess of surfactant (oleic acid) was studied. The separation of unbound oleic acid from QD solution was carried out by using high-density polyethylene (HDPE) membrane. The secondary solution with a separated surfactant as well as initial QD solution was spread over the water surface to obtain a monolayer with its compression isotherms studied using Langmuir-Blodgett (LB) technique. This approach allowed us to determine the concentration of surfactant at a level of 10−5 mol/l or less for CdSe/CdS/ZnS QD. For better understanding of the influence of purification on the properties of QD, the monolayer of QD was transferred onto solid substrate and its morphology was studied. Atomic force microscopy showed that removal of oleic acid excess results in a more uniform and dense packing of quantum dots.
      PubDate: 2018-06-08
      DOI: 10.1007/s12668-018-0537-0
       
  • Integration of Photocatalytic Oxidation and Biodegradation Treatment
           Processes to Enhance Degradation Efficiency of CETP Wastewater
           Contaminants
    • Abstract: In the present, experiment reported an emerging approach of integrated treatment processes such as photocatalytic oxidation and biodegradation to increase degradation efficiency of CETP wastewater. Photocatalytic oxidation process performed using hybrid photocatalyst Ti02 impregnated with activated carbon (AC) and biodegradation was performed by developed biofilm on biocarrier. Synthesized TiO2/AC powder was characterized by sophisticated instrumentation. A lab scale photocatalytic bioreactor was designed to remove pollutants from CETP effluent. In this setup, sample was treated with hybrid photocatalyst TiO2/AC under the sunlight and developed biofilm; sampling was done and analyzed. Our results show better degradation within 6 h because of generation of hydroxyl radical and superoxide species reacted with pollutants. This presented experiment shows the rapid degradation and increase removal efficiency of pollutants by using the integrated processes. Graphical ᅟ
      PubDate: 2018-06-07
      DOI: 10.1007/s12668-018-0534-3
       
  • Effects of Inclination of Micro-capillary on Blood-Viscosity of Diseased
           Blood in Presence of Metallic Ball
    • Abstract: Dynamic changes in rheology of blood within microvasculature structures can be used for diagnosing chronic non-communicable disease at earlier stages. Behavior of blood in microvascular structures (capillaries) is mysterious. In case of capillaries present in brain, such dynamic continuum induces hindrance to oxygen diffusion through circumvented nerve fibers at the junction of blood-brain barriers. It causes temporary regional hypoxia. Therefore, understanding the rheology of blood in micro-confined capillaries may evolve as a tool for early prediction of hypoxia. Viscosity of blood in micro-capillaries can be measured by principle of falling ball viscometer. But this technique produces inconsistent result for non-Newtonian fluid. In this paper, we have presented an investigation on dynamic behavior of blood rheology within micro-capillaries inclined at different degrees of inclinations. Experimental results are complemented with detailed numerical simulations. Experimental observations reveal significant variation of rheological parameters of blood in micro-capillaries. Inter-gender variations confirm the contribution of hematocrit in blood for this variation. The rheological parameters of blood with diseased condition are found to vary with the different degrees of inclination of the micro-capillary. Effect of rolling ball on the red blood cells (RBCs) during interaction in the capillary of the viscometer is found to induce deformative stress on membrane of RBC. It is also confirmed by the continuous sustainability of the higher magnitude strain rate near the wall (between boundaries of ball and wall). Inclined angle of capillary tube was also found as a parameter for defining rheology of blood in micro-capillary.
      PubDate: 2018-06-07
      DOI: 10.1007/s12668-018-0536-1
       
  • Bioaccumulation of Transition Metal Oxide Nanoparticles and Their
           Influence on Early Growth Stages of Vigna unguiculata Seeds
    • Authors: R. Suriyaprabha; K. A. Sreeja; M. Prabu; P. Prabu; V. Rajendran
      Abstract: A reasonable understanding of the impact and health risk of the metal oxide nanoparticles treated on edible plants is necessary in order to use nanomaterials in food and medicine. In this study, we investigate the uptake and toxic response of transition metal oxides, namely Fe2O3, CuO and ZnO nanoparticles synthesised by co-precipitation method using nitrate salts of the respective metals as precursors. The characterisation of all the prepared nanoparticles shows the purity above 97% with rod-like morphology. Cowpea (Vigna unguiculata) seeds are soaked in a monodispersed solution of nanoparticles and kept for seed germination and plant growth. Transport and accumulation of the nanoparticles treated in the seeds are assessed through X-ray fluorescence spectroscopy which confirms the uptake of the nanoparticles with respect to the treatment regime. The seeds soaked in CuO nanoparticles reveal better seed germination percentage, an increased coleoptile length and a plant height at 100 ppm concentration than other nanoparticles. This study proves the limitation of CuO nanoparticle application for better growth of cowpea plants whereas iron and zinc oxide nanoparticles show promising response in plant growth, uptake and bioavailability in seeds even at higher treatments. Graphical
      PubDate: 2018-06-04
      DOI: 10.1007/s12668-018-0535-2
       
  • A Critical Review of Heat Transfer Characteristic Using Nanofluid Flow
           Around a Set of 2D Cylinder Arrangements'
    • Authors: Soufiya Mizani; Hicham Zerradi; Sanaa Rochd; Aouatif Dezairi; Rachida Moultif
      Abstract: Our paper includes the results of a numerical simulation performed to study the nanofluid flow around a set of 2D cylinder arrangements. Two types of nanofluids involving Al2O3 and CuO nanoparticles dispersed separately in base fluids of water and ethylene glycol mixture 60:40; those nanofluids were taken to evaluate their effect on the flow around different equilateral-triangular arrangements of cylinders. The continuity and the momentum equations have been numerically solved by using a special technic named “SIMPLE algorithm.” Besides, the thermo-physical parameters of nanofluids have been evaluated using the theory of one fluid phase; thus, contemporary correlations of thermal conductivity and viscosity of nanofluids have been used in this paper as well as our previous work (Int J Adv Technol 7(4)0976–4860, 2016). The correlations are functions of particle volumetric concentration as well as temperature. The results of heat transfer characteristics of nanofluid flow around 2D cylinder arrangement revealed clear improvement compared with the base fluids. This enhancement is very interesting in engineering of flows with different equilateral-triangular arrangement characteristics of cylinders, while the gap ratios (G/D) of the three cylinders and incidence angle exert an enhancement efficiency influence on the heat transfer characteristics. The achieved results indicate that the use of aspect ratio 2.26 and incidence angle 1.98° leads to the high amounts of heat transfer inside the tube. In this study, the results obtained can be a fruitful source for developing and validating of new codes both in a scientific and commercial manner.
      PubDate: 2018-06-02
      DOI: 10.1007/s12668-018-0529-0
       
  • Green Synthesis of Silver Nanoparticles Using Nostoc linckia and its
           Antimicrobial Activity: a Novel Biological Approach
    • Authors: C. Vanlalveni; Kalyani Rajkumari; Aayushi Biswas; Partha Pradip Adhikari; R. Lalfakzuala; Lalthazuala Rokhum
      Abstract: The biosynthesis of nanoparticles by microorganism is considered a green, non-toxic, and environment-friendly technology. The present study reported for the first time, a rapid and green method for synthesis of silver nanoparticles (AgNPs) using cyanobacteria Nostoc linckia. UV-Vis spectrophotometer, X-ray diffraction (XRD), FT-IR, transmission electron microscopy (TEM), and energy dispersive X-ray (EDX) spectroscopy were used to confirm the formation of silver nanoparticles. The formation and stability of the reduced AgNPs in the colloidal solution were monitored by UV-Vis spectrophotometer analysis. The UV-Vis spectrum revealed a characteristic surface plasmon resonance (SPR) peak at 435 nm, which corresponds to the absorption band of silver nanoparticles. A shift in the absorption bands in FT-IR after the formation of nanoparticles confirmed that the microorganism extract acted not only as reducing agents but also as capping agents to stabilize the formed nanoparticles. X-ray diffraction pattern revealed the crystalline nature of the synthesized nanoparticles. Transmission electron microscope showed spherical shaped nanoparticles. The silver nanoparticles obtained were in the range of 5–60 nm as obtained from TEM. Selected area electron diffraction (SAED) confirmed the formation of metallic Ag. The presence of elemental silver was confirmed by EDX-ray spectroscopy analysis, which showed the peak in silver region at approximately 3 KeV. The AgNPs obtained showed highly potent antibacterial activities toward four different pathogenic bacteria, such as Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus susp. aureus, and two tested fungal strains (Candida albicans and Aspergillus niger). Graphical abstract ᅟ
      PubDate: 2018-04-13
      DOI: 10.1007/s12668-018-0520-9
       
  • Photodecorated Surface with Nanoparticles: Versatile Substrates for
           Technology Applications
    • Authors: Salvatore Petralia; Giorgio Ventimiglia
      Abstract: This contribution reports a simple and straightforward photochemical method for decorating hydrophobic surfaces with metal and metal oxide nanoparticles. The presented process includes the steps of providing a metal precursor having hydrophobic parts adapted to interact with assistance of a photosensitizer and forming a reactive adduct precursor metal/surface; the process allows the metal nanoparticles to grow directly onto the surface. The formed nanoparticles have been investigated by means of transmission electron microscopy (TEM) and optical techniques. The nanoparticles are sufficiently isolated, not aggregated and not interconnected; additionally, it is remarkable that the so-formed nanoparticles do not create a film, thus providing the treated surface with the chemical properties of both the substrate (surface portion not covered by the metal nanoparticles) and the metal. Substrates with multiple chemical functionalities are thereby obtained; they can selectively bind molecules with different chemistry, onto the uncovered substrate surface and onto metal nanoparticle surface. The proposed process also allows double decoration with two or more metallic species.
      PubDate: 2018-04-05
      DOI: 10.1007/s12668-018-0517-4
       
  • Changes in HLA-DR Expression on Monocytes and Lymphocytes in Neonatal
           Sepsis
    • Authors: Khalit S. Khaertynov; Vladimir A. Anokhin; Ilshat G. Mustafin; Albert A. Rizvanov; Sergey A. Lubin; Asiya Kh. Khaertynova; Svetlana A. Sofronova
      Abstract: HLA-DR is a key marker of leukocyte activation, which suppression determines the effectiveness of immune response and prognosis in neonatal sepsis (NS). The aim of this study was to evaluate the HLA-DR expression on lymphocytes and monocytes in the peripheral blood of neonates with sepsis. The study involved 21 neonates with sepsis and 10 healthy neonates born during the study period. Bacteremia was detected in five cases (24%). The most frequent pathogens found were Klebsiella pneumoniae (n = 2) and Staphylococcus aureus (n = 2) followed by Streptococcus agalactae (n = 1). NS was associated with pneumonia (n = 17), meningitis (n = 3), and necrotizing enterocolitis (n = 1). The onset of NS was accompanied with high blood monocyte activity which ranged from 96 to 100%. Blood CD3+ lymphocyte population and CD4+ and CD8+ lymphocyte subset levels were decreased, with their median values being 1.7, 2.2, and 2.4 times lower than those in the control group, respectively (р = 0.005, р = 0.0002, р = 0.003). The HLA-DR expression on CD3+ lymphocytes, as well as on CD4+ and CD8+ lymphocyte subsets, was extremely low ranging from 0.1 to 7% both in the onset of the disease and in a week after admission to a hospital. Absolute counts of activated CD4+ and CD8+ lymphocyte subsets were significantly lower on the disease first days as compared to the control group (р = 0.02 and р = 0.003, respectively). These results demonstrate adaptive immunity to be non-effective in neonates with sepsis. Low expression of HLA-DR on CD3 lymphocytes as well as on CD4 and CD8 lymphocyte subsets is a reason for immunostimulating therapy.
      PubDate: 2018-03-24
      DOI: 10.1007/s12668-018-0519-2
       
 
 
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