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https://www.readbyqxmd.com/read/28820042/biodegradation-of-remazol-brilliant-blue-r-using-isolated-bacterial-culture-staphylococcus-sp-k2204
#1
Velayutham Karthikeyan, Madhava Anil Kumar, Pushparaj Mohanapriya, Thanarasu Amudha, Devaraj Thiruselvi, Periyasamy Karthik, Subramanian Sivanesan
Staphylococcus sp. K2204, a bacterial isolate, was employed in this work to decolorize Remazol Brilliant Blue R (RBBR), which belongs to the anthraquinone class of textile dye. Staphylococcus sp. K2204 biodegraded 100 mg/L RBBR at 37°C, under static condition with the help of extracellular laccase and peroxidases. The products of RBBR degradation were characterized using analytical tools including mass spectral technique. The phytotoxicity tests evaluated the toxicity of RBBR and the products of biodegradation...
August 18, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28818326/dual-wavelength-led-based-uv-absorption-detector-for-nano-flow-capillary-liquid-chromatography
#2
Xiaofeng Xie, Luke T Tolley, Thy X Truong, H Dennis Tolley, Paul B Farnsworth, Milton L Lee
The design of a miniaturized LED-based UV-absorption detector was significantly improved for on-column nanoflow LC. The detector measures approximately 27mm×24mm×10mm and weighs only 30g. Detection limits down to the nanomolar range and linearity across 3 orders of magnitude were obtained using sodium anthraquinone-2-sulfonate as a test analyte. Using two miniaturized detectors, a dual-detector system was assembled containing 255nm and 275nm LEDs with only 216nL volume between the detectors A 100μm slit was used for on-column detection with a 150μm i...
August 1, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28812427/biosynthesis-of-anthraquinone-derivatives-in-a-sesamum-indicum-hairy-root-culture
#3
Toshio Furumoto, Ryuta Sato
In order to investigate the intermediacy of 2-(4-methylpent-3-en-1-yl)anthraquinone (MPAQ), a possible intermediate for the biosynthesis of anthraquinone derivatives in sesame (Sesamum indicum), (2)H-labeled MPAQ was administered to a hairy root culture of S. indicum. Efficient conversion of fed MPAQ to 2-[(Z)-4-methylpenta-1,3-dien-1-yl]anthraquinone ((Z)-MPDEAQ) was observed. Furthermore, administration experiment with (2)H-labeled 2-geranyl-1,4-naphthohydroquinone, another possible intermediate, showed that it was converted to MPAQ and (Z)-MPDEAQ...
August 16, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28811827/pharmacodynamics-and-medicinal-chemistry-of-an-external-chinese-herbal-formula-for-mammary-precancerous-lesions
#4
Ruixue Chen, Guijuan Zhang, Yi Ma, Fengjie Bie, Hongxia Fan, Min Ma
Ruyan Neixiao Cream (RYNXC) is a traditional Chinese herbal formula for treating mammary precancerous disease. This study was carried out to investigate in vivo anticancer effect of RYNXC and multiple constituents. 32 virginal Sprague-Dawley rats were randomly divided into blank control group (BC), mammary precancer models group (MODEL), tamoxifen group (TAM), and Ruyan Neixiao Cream group (RYNXC). TAM was intervened by tamoxifen; RYNXC was intervened by Ruyan Neixiao Cream. The chromatographic separation was performed by high performance liquid chromatography (HPLC) coupled with mass spectrometry (MS)...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28808390/immunomodulatory-cytotoxicity-and-antioxidant-activities-of-roots-of-ziziphus-mauritiana
#5
Samina Afzal, Murium Batool, Bashir Ahmad Ch, Ashfaq Ahmad, Muhammad Uzair, Khurram Afzal
AIMS: The study is conducted to evaluate the immunomodulatory, cytotoxicity, and antioxidant potential of Ziziphus mauritiana (Rhamnaceae). Phytochemical analysis of Z. mauritiana revealed the presence of alkaloids, anthraquinone glycoside, cardiac glycoside, saponin, tannin, and flavonoids. METHODOLOGY: The cytotoxicity of the plant Z. mauritiana was evaluated by brine shrimp lethality test. Antioxidant parameters such as superoxide dismutase (SOD), total antioxidant capacity (T-AOC), and malondialdehyde (MDA) levels were calculated in the plasma of rats after chronic administration of 400 mg/kg of Z...
July 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28806570/chiral-separation-of-terbutaline-and-non-steroidal-anti-inflammatory-drugs-by-using-a-new-lysine-bridged-hemispherodextrin-in-capillary-electrophoresis
#6
V Cucinotta, M Messina, A Contino, G Maccarrone, S Orlandini, A Giuffrida
A method for the separation of a mixture of terbutaline and non-steroidal anti-inflammatory drugs was developed using capillary electrophoresis with a new hemispherodextrin, ad hoc designed, the lysine - bridged hemispherodextrin (THLYSH). The use of lysine residues to bridge the trehalose capping unit moiety to the cyclodextrin cavity gives rise to a receptor with two long chains with amine nitrogen atoms, whose charge can be easily tuned as a function of the solution pH. The new hemispherodextrin was accurately characterised by ESI-MS and NMR spectroscopy, also highlighting its protonation behaviour...
August 3, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28803999/growth-arrest-and-morphological-changes-triggered-by-emodin-on-trypanosoma-cruzi-epimastigotes-cultivated-in-axenic-medium
#7
Ana R De Lima, Karem Noris-Suárez, Antonio Bretaña, Victor T Contreras, Maria C Navarro, Luis Pérez-Ybarra, José Bubis
Emodin is an anthraquinone obtained from Rheum palmatum rootstocks. Here we tested the cytotoxic effects of emodin on Trypanosoma cruzi epimastigotes, as well as the morphological changes that were induced by this compound in the parasite. Emodin was permeable and blocked in vitro cell division of T. cruzi epimastigotes in axenic medium, causing growth arrest in a dose-dependent but reversible manner. Emodin-exposed epimastigotes underwent duplication of organelles, such as the nucleus, kinetoplast and flagellum, but were incapable of completing cytokinesis...
August 10, 2017: Biochimie
https://www.readbyqxmd.com/read/28800757/anthelminthic-properties-of-methylene-chloride-methanol-1-1-extracts-of-two-cameroonians-medicinal-plants-on-heligmosomoides-bakeri-nematoda-heligmosomatidea
#8
Sergine Errole Ngouateu Teufack, Gertrude NMbogning Tayo, Marc Ngangout Alidou, Jeannette Yondo, Amely Frankline Djiomene, Josué Wabo Poné, Faùily Mpoame Mbida
BACKGROUND: The resistance of some medico-veterinary parasite strains as well as the unavailability and toxicity of synthetic anthelminthics on humans, animals and the impacts of their residues in the environment have pushed scientists to turn to plants with anthelminthic properties. Hence, the aim of this work was to contribute to the fight against helminths of medical and veterinary importance in general, and also to clear the environment of their free living stages. METHODS: Fresh eggs of Heligmosomoides bakeri were obtained from the faeces of experimentally infected mice...
August 11, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28800558/aqds-immobilized-solid-phase-redox-mediators-and-their-role-during-bioelectricity-generation-and-rr2-decolorization-in-air-cathode-single-chamber-microbial-fuel-cells
#9
Claudia M Martinez, Xiuping Zhu, Bruce E Logan
The application of immobilized redox mediators (RMs) in microbial fuel cells (MFCs) is an emerging technology for electricity generation with simultaneous azo dye decolorization due to facilitated electrons transfer from bacteria to anodes and azo dyes. The use of immobilized RMs avoids the requirement of their continuous dosing in MFCs, which has been the main limitation for practical applications. Two strategies of anthraquinones-2,6-disulphonic salt (AQDS) immobilization, AQDS immobilized with polyvinyl alcohol particles and AQDS immobilized on anodes by electropolymerization, were evaluated and compared to achieve simultaneous reactive red 2 (RR2) dye reduction and bioelectricity generation...
July 26, 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28800554/anthraquinone-2-sulfonate-immobilized-to-conductive-polypyrrole-hydrogel-as-a-bioanode-to-enhance-power-production-in-microbial-fuel-cell
#10
Xinhua Tang, How Yong Ng
In this study, anthraquinone-2-sulfonate (AQS), a redox mediator, was covalently bound to conductive polypyrrole hydrogel (CPH) via electrochemical reduction of the in-situ-generated AQS diazonium salts. The porous structure and hydrophilic surface of this CPH/AQS anode enhanced biofilm formation while the AQS bound on the CPH/AQS anode worked as a redox mediator. The CPH/AQS bioanode reduced the charge transfer resistance from 28.3Ω to 4.1Ω while increased the maximum power density from 762±37mW/m(2) to 1919±69mW/m(2), compared with the bare anode...
August 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28798991/a-highly-sensitive-electrochemical-dna-biosensor-from-acrylic-gold-nano-composite-for-the-determination-of-arowana-fish-gender
#11
Mahbubur Rahman, Lee Yook Heng, Dedi Futra, Chew Poh Chiang, Zulkafli A Rashid, Tan Ling Ling
The present research describes a simple method for the identification of the gender of arowana fish (Scleropages formosus). The DNA biosensor was able to detect specific DNA sequence at extremely low level down to atto M regimes. An electrochemical DNA biosensor based on acrylic microsphere-gold nanoparticle (AcMP-AuNP) hybrid composite was fabricated. Hydrophobic poly(n-butylacrylate-N-acryloxysuccinimide) microspheres were synthesised with a facile and well-established one-step photopolymerization procedure and physically adsorbed on the AuNPs at the surface of a carbon screen printed electrode (SPE)...
August 10, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28782615/polyphenolic-protein-polysaccharide-ternary-conjugates-from-cystoseira-barbata-tunisian-seaweed-as-potential-biopreservatives-chemical-antioxidant-and-antimicrobial-properties
#12
Sabrine Sellimi, Abdelkarim Benslima, Veronique Barragan-Montero, Mohamed Hajji, Moncef Nasri
The present study investigated the antioxidant and antimicrobial activities of naturally occurring Cystoseira barbata seaweed glyco-conjugates (CBGs), with a view to developing safer food preservatives. CBGs were successfully isolated, then chemically and structurally characterized. CBGs contained a high amount of polysaccharides (49.76%) that consisted mainly of neutral sugars (47.67%) and uronic acids (2.09%). The carbohydrate fraction was sulfated (13.81%) and conjugated with proteins (9.86%) and phenolic compounds (4...
August 3, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28772942/alizarin-red-s-confined-layer-by-layer-films-as-redox-active-coatings-on-electrodes-for-the-voltammetric-determination-of-l-dopa
#13
Shigehiro Takahashi, Iwao Suzuki, Tatsuro Sugawara, Masaru Seno, Daichi Minaki, Jun-Ichi Anzai
The preparation of redox-active coatings is a key step in fabricating electrochemical biosensors. To this goal, a variety of coating materials have been used in combination with redox-active compounds. In this study, alizarin red S (ARS) was confined in layer-by-layer (LbL) films composed of poly(ethyleneimine) (PEI) and carboxymethylcellulose (CMC) to study the redox properties. A gold (Au) disc electrode coated with PEI/CMC LbL film was immersed in an ARS solution to uptake ARS into the film. ARS was successfully confined in the LbL film through electrostatic interactions...
May 25, 2017: Materials
https://www.readbyqxmd.com/read/28752173/improved-i-motif-thermal-stability-by-insertion-of-anthraquinone-monomers
#14
Alaa S Gouda, Mahasen S Amine, Erik B Pedersen
In order to gain insight into how to improve thermal stability of i-motifs when used in the context of biomedical and nanotechnological applications, novel anthraquinone-modified i-motifs were synthesized by insertion of 1,8-, 1,4-, 1,5- and 2,6-disubstituted anthraquinone monomers into the TAA loops of a 22mer cytosine-rich human telomeric DNA sequence. The influence of the four anthraquinone linkers on the i-motif thermal stability was investigated at 295 nm and pH 5.5. Anthraquinone monomers modulate the i-motif stability in a position-depending manner and the modulation also depends on the substitution pattern of the anthraquinone...
August 9, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28745519/an-optimized-protocol-for-anthraquinones-isolation-from-rhamnus-frangula-l
#15
Renato Sonchini Gonçalves, Expedito Leite Silva, Noboru Hioka, Celso Vataru Nakamura, Marcos Luciano Bruschi, Wilker Caetano
Different from works described in the literature, which use expansive analytical methods to separation of anthraquinones derivatives (AQs), this communication reported a simple and inexpensive methodology to get them. In this way, the expensive commercial AQs: Chrysophanol, physcione and emodine were extracted from plant material (Rhamnus frangula L.) and isolated by classical column chromatography technique under optimised binary mobile phase gradients (CHCl3 : AcOEt(a), a = 1 to 5%) in excellent yields.
July 26, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28744218/bioconcentration-and-metabolism-of-emodin-in-zebrafish-eleutheroembryos
#16
Jiefeng Chen, Shaodong Li, Mengping Liu, Christopher Wai Kei Lam, Zheng Li, Xinjun Xu, Zuanguang Chen, Wei Zhang, Meicun Yao
Emodin is a major active anthraquinone of various herbal laxatives, which can exert many pharmacological effects. However, chronic use of anthranoid laxatives, even at low dosages, may cause melanosis coli (MC). It has been suggested that the accumulation of anthraquinones is a risk factor in the MC process. To investigate the accumulation of emodin, we conducted a bioconcentration study of emodin in zebrafish eleutheroembryos. Based on the economic cooperation and development (OECD) 305 test, zebrafish eleutheroembryos were exposed to emodin at a constant concentration for 48 h, before the test media were replaced by the blank medium for 24 h of depuration...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28733761/spontaneous-photosensitization-by-heterophyllaea-pustulata-hook-f-rubiaceae-in-sheep-from-northwestern-argentina
#17
J F Micheloud, L A Colque-Caro, L R Comini, J L Cabrera, S Núñez-Montoya, O G Martinez, E J Gimeno
Heterophyllaea pustulata Hook. f. (Rubiaceae) is a phototoxic plant. It grows in the Andean area of northwest of Argentina, and it causes significant economic losses in the livestock. This plant induces dermal lesions by photosensitization probably due to its content of photosensitizing anthraquinones. This paper describes an outbreak of poisoning in Corriedale sheepfold, which had an incidence of 49%. Ear skin biopsies and blood samples were collected of six affected animals. Liver enzymes remained within the reference limits...
July 21, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28732928/sonocatalytic-degradation-of-an-anthraquinone-dye-using-tio2-biochar-nanocomposite
#18
Alireza Khataee, Berkant Kayan, Peyman Gholami, Dimitrios Kalderis, Sema Akay
TiO2-biochar (TiO2-BC) nanocomposite was synthesized by sol-gel method. The characteristics of the prepared nanocomposite were examined using X-ray fluorescence, scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy and N2 adsorption-desorption analysis. The performance of synthesized TiO2-BC nanocomposite as efficient sonocatalyst was studied for the degradation of Reactive Blue 69 (RB69). Sonocatalytic degradation of RB69 in the presence of TiO2-BC nanocomposite could be explained by the mechanisms of hot spots and sonoluminescence...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28729838/detection-of-emodin-derived-glutathione-adduct-in-normal-rats-administered-with-large-dosage-of-polygoni-multiflori-radix
#19
Li-Long Jiang, Dong-Sheng Zhao, Ya-Xi Fan, Qiong Yu, Ping Li, Hui-Jun Li
Polygoni Multiflori Radix (PMR) has been commonly used as a tonic in China for centuries. PMR-associated hepatotoxicity has been drawing increasingly more attention in recent years in parallel with its wide utilization. Anthraquinones (AQs) are recognized as the main hepatotoxic components in PMR. However, the exact underlying mechanism of AQs poisoning is still not fully understood. Herein, we proposed a hypothesis that metabolic activation of AQs such as emodin was involved in PMR-induced liver injury, AQs followed to generate the electrophilic reactive metabolites and subsequently formed covalent adduct with cellular nucleophiles in the liver to exert hepatotoxicity...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28723923/on-the-mechanism-of-candida-tropicalis-biofilm-reduction-by-the-combined-action-of-naturally-occurring-anthraquinones-and-blue-light
#20
Juliana Marioni, Roger Bresolí-Obach, Montserrat Agut, Laura R Comini, José L Cabrera, María G Paraje, Santi Nonell, Susana C Núñez Montoya
The photoprocesses involved in the photo-induced Candida tropicalis biofilm reduction by two natural anthraquinones (AQs), rubiadin (1) and rubiadin-1-methyl ether (2), were examined. Production of singlet oxygen (1O2) and of superoxide radical anion (O2•-) was studied. Although it was not possible to detect the triplet state absorption of any AQs in biofilms, observation of 1O2 phosphorescence incubated with deuterated Phosphate Buffer Solution, indicated that this species is actually formed in biofilms...
2017: PloS One
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