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https://www.readbyqxmd.com/read/29318288/green-one-pot-synthesis-of-novel-polysubstituted-pyrazole-derivatives-as-potential-antimicrobial-agents
#1
Hamid Beyzaei, Zahra Motraghi, Reza Aryan, Mohammad Mehdi Zahedi, Alireza Samzadeh-Kermani
Various biological properties of natural and synthetic pyrazole derivatives such as anti-inflammatory, antimicrobial, neuroprotective, anticonvulsant, antidepressant and anticancer activities encouraged us to propose a new, fast, green and eco-friendly procedure for the preparation of some novel 5-amino-3-(aryl substituted)-1-(2,4-dinitrophenyl)-1H-pyrazole-4-carbonitriles. They were efficiently synthesized via one-pot two-step process reaction of malononitrile, 2,4-dinitrophenylhydrazine and different benzaldehydes in deep eutectic solvent (DES) glycerol/potassium carbonate...
December 2017: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/29310220/low-cost-and-reagent-free-paper-based-device-to-detect-chloride-ions-in-serum-and-sweat
#2
Stefano Cinti, Luca Fiore, Renato Massoud, Claudio Cortese, Danila Moscone, Giuseppe Palleschi, Fabiana Arduini
The recent goal of sustainability in analytical chemistry has boosted the development of eco-designed analytical tools to deliver fast and cost-effective analysis with low economic and environmental impact. Due to the recent focus in sustainability, we report the use of low-cost filter paper as a sustainable material to print silver electrodes and to load reagents for a reagent-free electrochemical detection of chloride in biological samples, namely serum and sweat. The electrochemical detection of chloride ions was carried out by exploiting the reaction of the analyte (i...
March 1, 2018: Talanta
https://www.readbyqxmd.com/read/29310101/three-dimensional-molybdenum-disulfide-graphene-hydrogel-with-tunable-heterointerfaces-for-high-selective-hg-ii-scavenging
#3
Yu-Ting Zhuang, Xiao Zhang, Dan-Hua Wang, Yong-Liang Yu, Jian-Hua Wang
A hierarchical and hybridized hydrogel with rational structure and composition as adsorbent possesses a series of distinct advantages, e.g., fast ion diffusion, high selectivity and good stability. Herein, a novel three-dimensional (3D) molybdenum disulfide (MoS2)-reduced graphene oxide (rGO) hydrogel with two-dimensional heterointerfaces is fabricated by an eco-friendly one-pot hydrothermal method. The heterointerfacial area could be readily tuned by the regulation of MoS2/rGO ratio, in order to improve the adsorption capacity and selectivity...
December 29, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29299926/hydrophilic-multi-template-molecularly-imprinted-biopolymers-based-on-a-green-synthesis-strategy-for-determination-of-b-family-vitamins
#4
Abbas Ostovan, Mehrorang Ghaedi, Maryam Arabi, Qian Yang, Jinhua Li, Lingxin Chen
A novel green synthesis strategy was proposed for preparation of multi-template molecularly imprinted biopolymers (mt-MIBP) in aqueous media with less consumption of organic solvents, which were subsequently used as sorbents of ultrasound-assisted dispersive solid-phase extraction (d-SPE) for simultaneous recognition and efficient separation of B-family vitamins in juice samples followed by high performance liquid chromatography (HPLC) determination. The obtained mt-MIBP was fully characterized by SEM, FT-IR, TEM and BET...
January 4, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29234975/adsorption-isotherms-and-kinetic-studies-for-the-defluoridation-from-aqueous-solution-using-eco-friendly-raw-marine-green-algae-ulva-lactuca
#5
Ghada F El-Said, Manal M El-Sadaawy, Mohamed A Aly-Eldeen
The defluoridation from aquatic medium by raw marine algae, Ulva lactuca, was investigated. The element components and adsorbent's properties were determined. The influence of pH, contact period, and Ulva sp. weight on the deflouridation was achieved. The complete defluoridation of 10 mg F-/l solution was obtained within 10 min at definite pHs. Fourteen adsorption isotherms and four kinetic models (pseudo-first order and pseudo-second order, Elovich, and intraparticle diffusivity) were studied. The most adequate model was performed by using five error functions...
December 12, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29220080/high-salinity-impacts-germination-of-the-halophyte-cakile-maritima-but-primes-seeds-for-rapid-germination-upon-stress-release
#6
Ahmed Debez, Ikram Belghith, Andreas Pich, Wael Taamalli, Chedly Abdelly, Hans-Peter Braun
Seed germination recovery aptitude is an adaptive trait of overriding significance for the successful establishment and dispersal of extremophile plants in their native ecosystems. Cakile maritima is an annual halophyte frequent on Mediterranean coasts, which transiently produces transiently dormant seeds under high salinity, but that germinate fast when soil salinity is lowered by rainfall. Here, we report eco-physiological and proteomic data about (i) the effect of high salt (200 mM NaCl) on the early developmental stages (germination and seedling) and (ii) the seed germination recovery capacity of this species...
December 8, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/29215872/selective-nitrate-reduction-to-dinitrogen-by-electrocatalysis-on-nanoscale-iron-encapsulated-in-mesoporous-carbon
#7
Wei Teng, Nan Bai, Yang Liu, Yupu Liu, Jianwei Fan, Wei-Xian Zhang
Excessive nutrients (N and P) are among the most concerned pollutants in surface and ground waters. Herein, we report nanoscale zero-valent iron supported on ordered mesoporous carbon (nZVI@OMC) for electrocatalytic reduction of nitrate (NO3-) to nitrogen gas (N2). This material has a maximum removal capacity of 315 mg N/g Fe and nitrogen selectivity up to 74%. The Fe-C nanocomposite is prepared via a postsynthetic modification including carbon surface oxidation, in-situ ammonia prehydrolysis of iron precursor and hydrogen reduction...
December 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29202577/all-graphene-based-highly-flexible-non-contact-electronic-skin
#8
Jianing An, Truong-Son Dinh Le, Yi Huang, Zhaoyao Zhan, Yong Li, Lianxi Zheng, Wei Huang, Gengzhi Sun, Young-Jin Kim
Non-contact electronic skin (e-skin), which possesses superior long-range and high-spatial-resolution sensory properties, is becoming indispensable in fulfilling the emulation of human sensation via prosthetics. Here we present an advanced design and fabrication of all-graphene-based highly flexible non-contact e-skins by virtue of femtosecond laser direct writing (FsLDW). The photo-reduced graphene oxide patterns function as the conductive electrodes, while the pristine graphene oxide thin film serves as the sensing layer...
December 5, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29190597/insecticidal-activity-of-camphene-zerumbone-and-%C3%AE-humulene-from-cheilocostus-speciosus-rhizome-essential-oil-against-the-old-world-bollworm-helicoverpa-armigera
#9
Giovanni Benelli, Marimuthu Govindarajan, Mohan Rajeswary, Baskaralingam Vaseeharan, Sami A Alyahya, Naiyf S Alharbi, Shine Kadaikunnan, Jamal M Khaled, Filippo Maggi
The fast-growing resistance development to several synthetic and microbial insecticides currently marketed highlighted the pressing need to develop novel and eco-friendly pesticides. Among the latter, botanical ones are attracting high research interest due to their multiple mechanisms of action and reduced toxicity on non-target vertebrates. Helicoverpa armigera (Lepidoptera: Noctuidae) is a key polyphagous insect pest showing insecticide resistance to several synthetic molecules used for its control. Therefore, here we focused on the rhizome essential oil extracted from an overlooked Asian plant species, Cheilocostus speciosus (J...
November 27, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29167550/speeding-up-bioproduction-of-selenium-nanoparticles-by-using-vibrio-natriegens-as-microbial-factory
#10
Helga Fernández-Llamosas, Laura Castro, María Luisa Blázquez, Eduardo Díaz, Manuel Carmona
Selenium and selenium nanoparticles (SeNPs) are extensively used in biomedicine, electronics and some other industrial applications. The bioproduction of SeNPs is gaining interest as a green method to manufacture these biotechnologically relevant products. Several microorganisms have been used for the production of SeNPs either under aerobic or anaerobic conditions. Vibrio natriegens is a non-pathogenic fast-growing bacterium, easily cultured in different carbon sources and that has recently been engineered for easy genetic manipulation in the laboratory...
November 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29146498/synthesis-and-characterization-of-silver-nanoparticles-using-gelidium-amansii-and-its-antimicrobial-property-against-various-pathogenic-bacteria
#11
Arivalagan Pugazhendhi, Desika Prabakar, Jaya Mary Jacob, Indira Karuppusamy, Rijuta Ganesh Saratale
Microfouling is evolving at a fast rate causing augmented mortality rates and damage worldwide. Until now, several remedial measures have been exploited to overcome microfouling, amongst them nanoparticles play a superior role. Currently, green synthesized nanoparticles have been centered owing to its eco-friendly, cost effectively and non-toxic nature which has also increased its industrial applications (biomedicine, food and textile). In the present research Silver Nanoparticles (Ag NPs) synthesized using marine red algae Gelidium amansii...
November 13, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29141144/engineering-interface-with-one-dimensional-co3o4-nanostructure-in-catalytic-membrane-electrode-towards-an-advanced-electrocatalyst-for-alcohol-oxidation
#12
Zhen Yin, Yumei Zheng, Hong Wang, Jianxin Li, Qingjun Zhu, Ye Wang, Na Ma, Gang Hu, Benqiao He, Axel Knop-Gericke, Robert Schloegl, Ding Ma
Electrochemical oxidation has attracted vast interests as a promising alternative to traditional chemical processes in fine chemical synthesis owing to its fast and sustainable features. An electrocatalytic membrane reactor (ECMR) with a three-dimensional (3D) electrode has been successfully designed for the selective oxidation of alcohols with high current efficiency to the corresponding acids or ketones. The anode electrode was fabricated by the in-situ loading of one-dimensional (1D) Co3O4 nanowires (NWs) on the conductive porous Ti membrane (Co3O4 NWs/Ti) via the combination of a facile hydrothermal synthesis and subsequent thermal treatment...
November 15, 2017: ACS Nano
https://www.readbyqxmd.com/read/29137784/surface-modified-sio2-nanoparticles-by-thiamine-and-ultrasonication-synthesis-of-pcl-sio2-vb1-ncs-morphology-thermal-mechanical-and-bioactivity-investigations
#13
Shadpour Mallakpour, Zahra Khani
The influence of silica (SiO2) nanoparticles (NPs) on the properties of polycaprolactone (PCL) was investigated. Due to the intense tendency of SiO2 NPs to aggregation and their high surface energy, the surface of SiO2 NPs was treatment via Vitamin B1 (VB1) as a biosafe coupling agent. Novel PCL/SiO2-VB1 nanocomposites (NC) films by variety of percentage of SiO2-VB1 NPs were prepared under ultrasonic irradiation as an eco-friendly and fast procedure following by casting method. Fourier transform infrared spectroscopy and energy dispersive X-ray analysis exposed the presence of SiO2 NPs into the polymer matrix...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29124326/impact-of-two-arbuscular-mycorrhizal-fungi-on-arundo-donax-l-response-to-salt-stress
#14
Susanna Pollastri, Andreas Savvides, Massimo Pesando, Erica Lumini, Maria Grazia Volpe, Elif Aylin Ozudogru, Antonella Faccio, Fausta De Cunzo, Marco Michelozzi, Maurizio Lambardi, Vasileios Fotopoulos, Francesco Loreto, Mauro Centritto, Raffaella Balestrini
AM symbiosis did not strongly affect Arundo donax performances under salt stress, although differences in the plants inoculated with two different fungi were recorded. The mechanisms at the basis of the improved tolerance to abiotic stresses by arbuscular mycorrhizal (AM) fungi have been investigated mainly focusing on food crops. In this work, the potential impact of AM symbiosis on the performance of a bioenergy crop, Arundo donax, under saline conditions was considered. Specifically, we tried to understand whether AM symbiosis helps this fast-growing plant, often widespread in marginal soils, withstand salt...
November 9, 2017: Planta
https://www.readbyqxmd.com/read/29113890/analysis-of-aspergillus-sp-lipase-immobilization-for-the-application-in-organic-synthesis
#15
Alisa Gricajeva, Simas Kazlauskas, Lilija Kalėdienė, Vida Bendikienė
Nowadays, for the industrial implementations, especially in the area of organic synthesis, immobilized enzymes are preferred over their soluble forms. Present study aimed to find fast, cost-efficient, and effective way of lipase immobilization for the use in organic media. Lipase from Aspergillus sp. (Resinase A 2X) was immobilized utilizing cross-linking of enzyme aggregates, covalent immobilization on magnetite particles and adsorption-immobilization using pyrolyzed sugar industry waste product as a novel type of carrier...
November 4, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29105715/vertically-stacked-nanocellulose-tactile-sensor
#16
Minhyun Jung, Kyungkwan Kim, Bumjin Kim, Kwang-Jae Lee, Jae-Wook Kang, Sanghun Jeon
Paper-based electronic devices are attracting considerable attention, because the paper platform has unique attributes such as flexibility and eco-friendliness. Here we report on what is claimed to be the firstly fully integrated vertically-stacked nanocellulose-based tactile sensor, which is capable of simultaneously sensing temperature and pressure. The pressure and temperature sensors are operated using different principles and are stacked vertically, thereby minimizing the interference effect. For the pressure sensor, which utilizes the piezoresistance principle under pressure, the conducting electrode was inkjet printed on the TEMPO-oxidized-nanocellulose patterned with micro-sized pyramids, and the counter electrode was placed on the nanocellulose film...
November 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/29077102/improved-response-time-of-flexible-microelectromechanical-sensors-employing-eco-friendly-nanomaterials
#17
Shicheng Fan, Li Dan, Lingju Meng, Wei Zheng, Anastasia Elias, Xihua Wang
Flexible force/pressure sensors are of interest for academia and industry and have applications in wearable technologies. Most of such sensors on the market or reported in journal publications are based on the operation mechanism of probing capacitance or resistance changes of the materials under pressure. Recently, we reported the microelectromechanical (MEM) sensors based on a different mechanism: mechanical switches. Multiples of such MEM sensors can be integrated to achieve the same function of regular force/pressure sensors while having the advantages of ease of fabrication and long-term stability in operation...
November 9, 2017: Nanoscale
https://www.readbyqxmd.com/read/28962761/one-pot-production-of-chitin-with-high-purity-from-lobster-shells-using-choline-chloride-malonic-acid-deep-eutectic-solvent
#18
Ping Zhu, Zhongji Gu, Shu Hong, Hailan Lian
For the first time in this study, chitin was solely extracted from lobster shells through a fast, easy and eco-friendly method using deep eutectic solvents (DESs), consisting of mixtures of choline chloride-thiourea (CCT), choline chloride-urea (CCU), choline chloride-glycerol (CCG) and choline chloride-malonic acid (CCMA). The physiochemical properties of the isolated chitins were compared with those of the chemically prepared one and commercial one from shrimp shells. Results showed that CCT, CCU and CCG DESs had no important effect on the elimination of proteins and minerals, while chitin obtained by CCMA DES showed a high purity...
December 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28946439/ultrasonic-assisted-fabrication-of-starch-mwcnt-glucose-nanocomposites-for-drug-delivery
#19
Shadpour Mallakpour, Leila Khodadadzadeh
The principal focus of this investigation is to prepare starch nanocomposite (NC) films containing multi-walled carbon nanotube (MWCNT) and apply these NCs for drug delivery. Firstly, to raise the hydrophilicity of carboxyl functionalized MWCNT, the surface of them was modified with d-glucose (Gl) as a low cost and environmentally friendly biomolecule. Different percentages of MWCNT-Gl (0.5, 1 and 2wt%) were embedded in starch matrix through sonochemical method as an economical, fast, eco-friendly, and effective method...
January 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28936587/metabolite-ratios-as-potential-biomarkers-for-type-2-diabetes-a-direct-study
#20
Sophie Molnos, Simone Wahl, Mark Haid, E Marelise W Eekhoff, René Pool, Anna Floegel, Joris Deelen, Daniela Much, Cornelia Prehn, Michaela Breier, Harmen H Draisma, Nienke van Leeuwen, Annemarie M C Simonis-Bik, Anna Jonsson, Gonneke Willemsen, Wolfgang Bernigau, Rui Wang-Sattler, Karsten Suhre, Annette Peters, Barbara Thorand, Christian Herder, Wolfgang Rathmann, Michael Roden, Christian Gieger, Mark H H Kramer, Diana van Heemst, Helle K Pedersen, Valborg Gudmundsdottir, Matthias B Schulze, Tobias Pischon, Eco J C de Geus, Heiner Boeing, Dorret I Boomsma, Anette G Ziegler, P Eline Slagboom, Sandra Hummel, Marian Beekman, Harald Grallert, Søren Brunak, Mark I McCarthy, Ramneek Gupta, Ewan R Pearson, Jerzy Adamski, Leen M 't Hart
AIMS/HYPOTHESIS: Circulating metabolites have been shown to reflect metabolic changes during the development of type 2 diabetes. In this study we examined the association of metabolite levels and pairwise metabolite ratios with insulin responses after glucose, glucagon-like peptide-1 (GLP-1) and arginine stimulation. We then investigated if the identified metabolite ratios were associated with measures of OGTT-derived beta cell function and with prevalent and incident type 2 diabetes...
September 21, 2017: Diabetologia
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