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https://www.readbyqxmd.com/read/28918427/safety-of-monitored-anesthesia-care-using-propofol-based-sedation-for-pleuroscopy
#1
Erik Vakil, Mona Sarkiss, David Ost, Macarena R Vial, Roberto F Casal, Georgie A Eapen, Horiana B Grosu
BACKGROUND: The optimal approach to sedation for pleuroscopy remains undefined. Propofol is the favored sedative-hypnotic for many proceduralists but has a narrow therapeutic window and the risk for oversedation is high. Propofol-based sedation administered by anesthesiologists and the routine use of end-tidal capnography and bispectral index (BIS) monitoring may attenuate risks of complications. OBJECTIVES: The purpose of our study was to evaluate the safety and efficacy of monitored anesthesia care for pleuroscopy...
September 16, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/28918355/gallium-iii-chelates-of-mixed-phosphonate-carboxylate-triazamacrocyclic-ligands-relevant-to-nuclear-medicine-structural-stability-and-in-vivo-studies
#2
Maria I M Prata, João P André, Zoltán Kovács, Anett I Takács, Gyula Tircsó, Imre Tóth, Carlos F G C Geraldes
Three triaza macrocyclic ligands, H6NOTP (1,4,7-triazacyclononane-N,N',N″-trimethylene phosphonic acid), H4NO2AP (1,4,7-triazacyclononane-N-methylenephosphonic acid-N',N″-dimethylenecarboxylic acid), and H5NOA2P (1,4,7-triazacyclononane-N,N'-bis(methylenephosphonic acid)-N″-methylene carboxylic acid), and their gallium(III) chelates were studied in view of their potential interest as scintigraphic and PET (Positron Emission Tomography) imaging agents. A (1)H, (31)P and (71)Ga multinuclear NMR study gave an insight on the structure, internal dynamics and stability of the chelates in aqueous solution...
September 1, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28918219/a-highly-selective-fluorescent-chemosensor-for-cn-based-on-a-novel-bis-salamo-type-tetraoxime-ligand
#3
Fei Wang, Lei Gao, Qing Zhao, Yang Zhang, Wen-Kui Dong, Yu-Jie Ding
The optical properties of a novel chemosensor for cyanide anions based on a symmetric bis(salamo)-type ligand (H3L) were investigated by UV-Vis and fluorescence spectroscopy in MeOH/H2O (1:1 v/v) solution. Sensor H3L can selectively sense CN(-) based on prominent color changes among other anions. The chemosensor exhibits an apparent fluorescence enhancement at 482nm to CN(-) which because cyanide ions interact with CN bonds. Combining the corrected Benesi-Hildebrand formula, the binding constant of the formed host-guest complex was calculated as 2...
September 14, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28917783/intellectual-modifying-a-bare-glassy-carbon-electrode-to-fabricate-a-novel-and-ultrasensitive-electrochemical-biosensor-application-to-determination-of-acrylamide-in-food-samples
#4
Kambiz Varmira, Omid Abdi, Mohammad-Bagher Gholivand, Hector C Goicoechea, Ali R Jalalvand
Acrylamide (AA) is a neurotoxin and carcinogen which is mainly formed in foods containing large quantities of starch processed at high temperatures and its determination is very important to control the quality of foods. In this work, a novel electrochemical biosensor based on hemoglobin-dimethyldioctadecylammonium bromide (HG-DDAB)/platinum-gold-palladium three metallic alloy nanoparticles (PtAuPd NPs)/chitosan-1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (Ch-IL)/multiwalled carbon nanotubes-IL (MWCNTs-IL)/glassy carbon electrode (GCE) is proposed for ultrasensitive determination of AA in food samples...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917734/a-novel-benzothiazole-based-fluorescent-probe-for-cysteine-detection-and-its-application-on-test-paper-and-in-living-cells
#5
Yuewen Yu, Hongping Xu, Wang Zhang, Bingxiang Wang, Yuliang Jiang
A novel simple and readily synthesized turn-on fluorescent probe 4-(benzo[d]thiazol-2-yl)-1,3-phenylene bis(2-chloroacetate) (BPBC) for cysteine (Cys) was reported. This probe was designed based on an excited-state intramolecular proton transfer (ESIPT) dye: benzothiazole, and two chloroacetate groups present in benzothiazole as the reaction sites for Cys. It shows high selectivity and sensitivity for Cys over other amino acids including the similar structured homocysteine (Hcy) and glutathione (GSH). In addition, probe BPBC was successfully applied to bioimage intracellular Cys in living cells with low cytotoxicity...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28915907/effect-of-a-mother-s-recorded-voice-on-emergence-from-general-anesthesia-in-pediatric-patients-study-protocol-for-a-randomized-controlled-trial
#6
Seok Young Song, Sang Gyu Kwak, Eugene Kim
BACKGROUND: Emergence delirium is a behavioral disturbance after general anesthesia in children and may distress both the patients and the primary caregivers, such as parents and medical staff, looking after the patients. Various medical and emotional interventions have been investigated to reduce emergence delirium; however, none are completely effective. This trial intends to assess whether the mother's recorded voice can reduce this adverse post-anesthesia event and facilitate arousal from general anesthesia...
September 15, 2017: Trials
https://www.readbyqxmd.com/read/28915543/effects-of-diisononyl-phthalate-on-danio-rerio-reproduction
#7
Stefania Santangeli, Francesca Maradonna, Maya Zanardini, Valentina Notarstefano, Giorgia Gioacchini, Isabel Forner-Piquer, Hamid Habibi, Oliana Carnevali
Di-isononyl phthalate (DiNP) is a high molecular weight phthalate commonly used as a plasticizer. It was introduced as a replacement for bis (2-ethylhexyl) phthalate (DEHP) which is used in the production of plasticized polyvinyl chloride (PVC). The purpose of this study was to investigate for the first time the effect of DiNP on female reproductive physiology in Danio rerio. Fish were exposed to five different doses of DiNP plus control (0 μg/L; 0.42 μg/L; 4.2 μg/L; 42 μg/L; 420 μg/L; 4200 μg/L) for a period of 21 days...
September 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28915466/synthesis-and-characterization-of-bright-green-terbium-coordination-complex-derived-from-1-4-bis-carbonylmethyl-terephthalate-structure-and-luminescence-properties
#8
Mengjiao Ma, Congcong Li, Dengkun Shu, Chaohua Wang, Peng Xi
A photoluminescent terbium (Tb) complex involving a novel benzoic-acid compound with a unique coordinated structure, namely 1,4-bis(carbonylmethyl)terephthalate (BCMT), has been designed and synthesized. The new coordinate structure and energy-transfer mechanism between the ligand and Tb(III) ions were investigated in detail. The results demonstrated that the BCMT-Tb(III) complex shows strong fluorescence intensity (4×10(6)a.u.) and long fluorescence lifetime (1.302ms), owing to the favorable degree of energy matching between the triplet excited level of the ligand and the resonant level of Tb(III) ions...
September 8, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28915059/difluoromethylation-of-carboxylic-acids-via-the-addition-of-difluorinated-phosphorus-ylide-to-acyl-chlorides
#9
Alexey L Trifonov, Vitalij V Levin, Marina I Struchkova, Alexander D Dilman
A one-step protocol for the difluoromethylation of carboxylic acids is described. The reaction involves the interaction of intermediate acyl chlorides with in situ generated difluorinated phosphorus ylide Ph3P═CF2. Aromatic acids can be selectively transformed within one step either to bis-difluoromethylated alcohols or to difluorinated ketones depending on the particular reaction conditions. For bulky α-branched carboxylic acids, only ketones are produced.
September 15, 2017: Organic Letters
https://www.readbyqxmd.com/read/28914980/co3o4-co-ncnt-nanostructure-derived-from-a-dicyanamide-based-metal-organic-framework-as-efficient-bi-functional-electrocatalyst-for-oxygen-reduction-and-evolution-reactions
#10
Nivedita Sikdar, Bharathi Konkena, Justus Masa, Wolfgang Schuhmann, Tapas Kumar Maji
There has been growing interest in the synthesis of efficient reversible oxygen electrodes for both the oxygen reduction reaction (ORR) and the oxygen evolution reactions (OER) for their potential use in a variety of renewable energy technologies such as regenerative fuel cells and metal-air batteries. Here, we report a bi-functional electrocatalyst derived from a novel dicyanamide based nitrogen rich MOF {[Co(bpe)2(N(CN)2)](N(CN)2)(5H2O)}n [Co-MOF-1, bpe = 1,2-bis(4-pyridyl)ethane, N(CN)2- = dicyanamide] under different pyrolysis conditions...
September 15, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28914102/5-httlpr-brain-derived-neurotrophic-factor-bdnf-gene-interactions-and-early-adverse-life-events-effect-on-impulsivity-in-suicide-attempters
#11
Luis Jiménez-Treviño, Pilar Alejandra Saiz, Maria Paz García-Portilla, Hilario Blasco-Fontecilla, Vladimir Carli, Miriam Iosue, Isabelle Jaussent, Jorge López-Castroman, Concepcion Vaquero-Lorenzo, Marco Sarchiapone, Enrique Baca-García, Philippe Courtet, Julio Bobes
OBJECTIVES: An expanding body of research suggests that childhood adverse experiences can lead to different negative health outcomes, including attempted suicide. Serotonergic genes such as the promoter region of the serotonin transporter gene (5-HTTLPR) have been associated both with impulsivity in suicide attempts and reactivity to environmental stress exposure. BDNF gene may play an epigenetic role. METHODS: We studied the influence of childhood stressful events and 5-HTTLPR genotype on impulsivity measured by Barratt Impulsivity Scale (BIS-10) in a multicentre sample of 1,655 suicide attempters (69...
September 15, 2017: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/28913917/merging-2-2-cycloaddition-with-radical-1-4-addition-metal-free-access-to-functionalized-cyclobuta-a-naphthalen-4-ols
#12
Bo Jiang, Feng Liu, Jia-Yin Wang, Peng Zhou, Guigen Li, Wen-Juan Hao, Shu-Jiang Tu
Metal-free [2 + 2] cycloaddition and S-centered radical-induced 1,4-addition cascades have been achieved by treating benzene-linked allene-ynes with aryldiazonium tetrafluoroborates and DABCO-bis(sulfur dioxide) in a one-pot operation; the reaction provides a greener and practical access to functionalized cyclobuta[a]naphthalen-4-ols of valuable applications. More than 50 examples were examined to achieve up to excellent diastereoselectivity and yields. The reaction pathway is proposed to proceed through the sequence of [2 + 2] cycloaddition, insertion of SO2, 1,4-addition, diazotization and tautomerization...
September 14, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28913533/synthesis-and-redox-reactions-of-bis-verdazyl-palladium-complexes
#13
Corey A Sanz, Zach R McKay, Shaun W C MacLean, Brian O Patrick, Robin G Hicks
The synthesis and ligand-centered redox chemistry of palladium complexes bearing two potentially bidentate verdazyl ligands is explored. Reaction of 1,5-diisopropyl-3-pyridin-2-yl-6-oxoverdazyl radical 1 with Pd(NCMe)4·2BF4 gives a complex containing two coordinated verdazyl radicals. The structure of this complex consists of one verdazyl bound to Pd in a bidentate mode and the second verdazyl bound in a monodentate fashion through the pyridine substituent; the fourth coordination site is occupied by a solvent molecule (acetonitrile (3) or dimethyl sulfoxide (4))...
September 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28913531/augmented-ph-sensitivity-absorbance-of-a-ruthenium-ii-bis-bipyridine-complex-with-elongation-of-the-conjugated-ligands-an-experimental-and-theoretical-investigation
#14
Siew San Tan, Susumu Yanagisawa, Kouji Inagaki, Yoshitada Morikawa, Mohammad B Kassim
An absorbance-based sensor employing ruthenium bipyridyl with a phenanthroline-fused benzoylthiourea moiety formulated as [Ru(ii)(bpy)2(phen-nBT)](PF6)2 {bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline, nBT = n-benzoylthiourea} has been synthesized and characterized by elemental analyses, mass spectrometry, and infrared, ultraviolet-visible, luminescence and nuclear magnetic resonance spectroscopy. The changes in the intensity of absorption and emission of the complex induced by functionalization of the benzoylthiourea ligands with amino and carbonyl in their protonated and deprotonated forms were studied experimentally...
September 15, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28913523/the-difficult-search-for-organocerium-iv-compounds
#15
Reiner Anwander, Michael Dolg, Frank T Edelmann
This Tutorial Review provides an overview of the historic and current development of the organometallic chemistry of cerium in its oxidation state 4+. Among the tetravalent lanthanide ions, only Ce(4+) forms stable coordination compounds (e.g. (NH4)2[Ce(NO3)6]). Important fields of applications for cerium(iv) compounds include organic synthesis, bioinorganic chemistry, materials science, and industrial catalysis. In sharp contrast, organometallic cerium(iv) compounds are still exceedingly rare. The history of organocerium(iv) compounds is an exciting story of ups and downs...
September 15, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28911673/impact-of-different-partitioned-solvents-on-chemical-composition-and-bioavailability-of-sasa-quelpaertensis-nakai-leaf-extract
#16
Masaya Nakamura, Jong-Hwan Ra, Youngheun Jee, Ju-Sung Kim
The leaves of Sasa quelpaertensis Nakai were extracted with 80% ethanol and further partitioned with n-hexane, chloroform, ethyl acetate, n-butanol, and aqueous fractions to evaluate the biological activity through assessment via various in vitro assays, including total phenol content; 1,1-diphenyl-1-picrylhydrazyl (DPPH) and 2,2-azino-bis-(3-ethylbenzothiazothiazoline-6-sulfornic acid (ABTS) radical scavenging; reducing power; α-glucosidase and tyrosinase inhibitory; and alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH) activity assays...
April 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28911643/cytotoxic-and-antioxidant-capacity-of-camel-milk-peptides-effects-of-isolated-peptide-on-superoxide-dismutase-and-catalase-gene-expression
#17
Masoud Homayouni-Tabrizi, Ahmad Asoodeh, Mozhgan Soltani
Peptides from natural sources such as milk are shown to have a wide spectrum of biological activities. In this study, three peptides with antioxidant capacity were identified from camel milk protein hydrolysate. Pepsin and pancreatin were used for hydrolysis of milk proteins. Ultrafiltration and reverse-phase high-performance liquid chromatography were used for the concentration and purification of the hydrolysate, respectively. Sequences of the three peptides, which were determined by matrix-assisted laser desorption/ionization time-of-flight spectrophotometry, were LEEQQQTEDEQQDQL [molecular weight (MW): 1860...
July 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28911224/total-synthesis-of-unsymmetrically-oxidized-nuphar-thioalkaloids-via-copper-catalyzed-thiolane-assembly
#18
Jacob J Lacharity, Jeremy Fournier, Ping Lu, Artur K Mailyan, Aaron T Herrmann, Armen Zakarian
An asymmetric total synthesis of (+)-6-hydroxythiobinupharidine (1b) and (-)-6-Hydroxythionuphlutine (2b), a set of hemi-aminal containing dimeric sesquiterpenes isolated from yellow water lilies of the Nuphar genus, is described. The central bis-spirocyclic thiolane was forged through the Stevens rearrangement of a sulfonium ylide, generated in-situ from the coupling of a copper carbenoid with a spirocyclic thietane. This strategy diverges both from the proposed biosynthesis1 and previous syntheses of this family of alkaloids,2,3 all of which employ dimerization of symmetric monomers to form the aforementioned central thiolane...
September 15, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28906573/bis-copper-ii-%C3%AF-radical-multi-heterospin-system-with-non-innocent-doubly-n-confused-dioxohexaphyrin-1-1-1-1-1-0-ligand
#19
Hiroyuki Furuta, Kazuhisa Yamasumi, Keiichi Nishimura, Yutaka Hisamune, Yusuke Nagae, Tomoki Uchiyama, Kazutaka Kamitani, Tomoyasu Hirai, Maiko Nishibori, Shigeki Mori, Satoru Karasawa, Tatsuhisa Kato, Ko Furukawa, Masatoshi Ishida
A contracted doubly N-confused dioxohexaphyrin(1.1.1.1.1.0) complex consisting of two paramagnetic copper metals and open-shell π radical ligand was synthesized as a new multi-heterospin motif. X-ray spectroscopy supported the divalent character of the inner copper centers, and electron paramagnetic resonance and magnetometric studies suggested the presence of unpaired d electrons strongly antiferromagnetically coupled with π-radical delocalized on the macrocycle. The 25π non-innocent dioxohexaphyrin ligand allowed the facile interconversion between antiaromatic 24π and aromatic 26π species, respectively, upon redox reactions...
September 14, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28906512/three-series-of-heterometallic-ni-ii-ln-iii-schiff-base-complexes-synthesis-crystal-structures-and-magnetic-characterization
#20
Lin Jiang, Yue Liu, Xin Liu, Jinlei Tian, Shiping Yan
Three series of Ni(II)-Ln(III) complexes were synthesized with the general formulae [(μ3-CO3)2{Ni(HL)(CH3-CH2OH)Ln(CH3COO)}2]·2CH3CH2OH (1-6) (Ln = Tb (1), Dy (2), Ho (3), Er (4), Tm (5), Yb (6); H3L = N,N'-bis(3-methoxysalicylidene)-1,3-diamino-2-prop-anol), [Ni(HL)Ln(dbm)3]·CH3OH2·2CH2Cl2 (7-10) (Ln = Tb (7), Eu (8), Gd (9), Ho (10); Hdbm = 1,3-diphenyl-1,3-propanedione) and [Ni(HL)(H2O)(tfa)Ln(hfac)2] (11-15) (Ln = Tb (11), Dy (12), Eu (13), Gd (14), Ho (15); Hhfac = 1,1,1,5,5,5-hexafluoropentane-2,4-dione, tfa(-) = trifluoroacetate) using compartmental Schiff base ligands in conjunction with auxiliary ligands...
September 14, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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