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https://www.readbyqxmd.com/read/28328660/addressing-the-barriers-to-bioimpedance-spectroscopy-use-in-major-burns-alternate-electrode-placement
#1
Pippa Kenworthy, Tiffany L Grisbrook, Michael Phillips, William Gibson, Fiona M Wood, Dale W Edgar
Bioimpedance spectroscopy (BIS) is a method used to assess body composition and fluid distribution. As a technology for measurement of fluid shifts during acute burn resuscitation, there are potential barriers to its use due to the location of wounds. This study aimed to determine whether alternate electrode positions were a suitable alternative compared to standardized (manufacturer) positions in moderate to large size burns for the measurement of BIS resistance and fluid changes. BIS measurements were collected in standard and alternate electrode placements and in an open wound and Acticoat™ dressing condition...
March 15, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28328218/functionalized-lanthanide-iii-complexes-constructed-from-azobenzene-derivative-and-%C3%AE-diketone-ligands-luminescent-magnetic-and-reversible-trans-to-cis-photoisomerization-properties
#2
Li-Rong Lin, Hui-Hui Tang, Yun-Guang Wang, Xuan Wang, Xue-Ming Fang, Li-Hua Ma
The coordination ability of ligands functionalized by azobenzene was manipulated, and two novel chelating ligands, (E)-4-(phenyldiazenyl)-N,N-bis(pyridin-2-ylmethyl) benzohydrazide (C25H22N6O, PBPM) and (E)-4-((4-(dimethylamino)phenyl)diazenyl)-N,N-bis(pyridin-2-ylmethyl) benzohydrazide (C27H27N7O, dmPBPM), were synthesized. The ligands can offer four coordinating atoms (one oxygen and three nitrogens) to act as tetradendate ligands, together with the two β-diketonates (4,4,4-trifluoro-1-phenylbutane-1,3-dionate, tfd), and the trifluoroacetate anion presented as a ligand and a counterion to form the quaternary units with lanthanide(III) ions (La, Eu, and Gd), [Ln(tfd)2(PBPM)(CF3CO2)] (LnC47H34F9N6O7) and [Ln(tfd)2(dmPBPM)(CF3CO2)] (LnC49H39F9N7O7), where the lanthanide(III) ions are nine coordinated with N3O6 donor sets...
March 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28328194/self-assembly-of-large-gold-nanoparticles-for-surface-enhanced-raman-spectroscopy
#3
Guang Yang, Jagjit Nanda, Boya Wang, Gang Chen, Daniel T Hallinan
Performance of portable technologies from mobile phones to electric vehicles is currently limited by the energy density and lifetime of lithium batteries. Expanding the limits of battery technology requires in situ detection of trace components at electrode-electrolyte interphases. Surface-enhance Raman spectroscopy could satisfy this need if a robust and reproducible substrate were available. Gold nanoparticles (Au NPs) larger than 20 nm diameter are expected to greatly enhance Raman intensity if they can be assembled into ordered monolayers...
March 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28328038/superbasic-alkyl-substituted-bisphosphazene-proton-sponges-a-new-class-of-deprotonating-matrices-for-negative-ion-matrix-assisted-ionization-laser-desorption-mass-spectrometry-of-low-molecular-weight-hardly-ionizable-analytes
#4
C D Calvano, T R I Cataldi, J F Kögel, A Monopoli, F Palmisano, J Sundermeyer
RATIONALE: Here hardly ionizable and low molecular weight compounds are detected in negative ion mode by using novel superbasic proton sponges based on 1,8-bisphosphazenylnaphthalene (PN) as MALDI matrices. Among the selected proton sponges, 1,8-bis(trispyrrolidinophosphazenyl)naphthalene (TPPN) has shown the best behaviour as matrix since it allows the direct detection of intact cholesterol without derivatization also in real challenging samples. METHODS: Very weakly acidic compounds such as sterols, steroids, fatty alcohols and saccharides were detected in reflectron negative ion mode by a MALDI TOF/TOF system equipped with a neodymium-doped yttrium lithium fluoride (Nd:YLF) laser (345 nm) with typical mass accuracy of 10 ppm...
July 30, 2016: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28327766/phosphorescent-platinum-ii-alkynyls-end-capped-with-benzothiazole-units
#5
Rebeca Lara, Elena Lalinde, M Teresa Moreno
Symmetric trans-bis(alkynyl)bis(phosphine) Pt(II) complexes based on the 2-phenylbenzothiazole (pbt) unit [trans-Pt(C[triple bond, length as m-dash]C-pbt)2L2] [L = PPh31, PEt32, 1,3,5-triaza-7-phosphaadamantane (PTA) 3] and the mixed alkynyl-cyanide anionic complex (NBu4)2[trans-Pt(C[triple bond, length as m-dash]C-pbt)2(CN)2] (4) were synthesized. The complexes have been fully characterized including X-ray crystallography for 2 and 4. All complexes display long-lived emission with moderate quantum yields (ϕ 6...
March 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28327749/mono-and-polynuclear-ag-i-complexes-of-n-functionalized-bis-diphenylphosphino-amine-dppa-type-ligands-synthesis-solid-state-structures-and-reactivity
#6
Alessio Ghisolfi, Christophe Fliedel, Pierre de Frémont, Pierre Braunstein
The reactivity of the N-functionalized DPPA-type ligands (Ph2P)2N(p-Z)C6H4 [Z = H (1a), SMe (1b), OMe (1c)] with AgBF4 was investigated and revealed an unexpected influence of the para substituent Z of the N-aryl ligand. In acetone, the mononuclear bis-chelated [Ag{(1a-1c)-P,P}2]BF4 (2a·BF4-2c·BF4) and dinuclear bridged [Ag2{μ2-(1a-1c)-P,P}2](BF4)2 [3a·(BF4)2-3c·(BF4)2] complexes were obtained with a 1 : 2 and 1 : 1 AgBF4/ligand molar ratio, respectively. While the molecular structures of 2a·BF4 and 2b·BF4 determined in the solid-state by X-ray diffraction revealed their mononuclear nature and the absence of cation/anion interaction, complexes 3b·(BF4)2 and 3c·(BF4)2 form 2D coordination polymers through intermolecular Ag-S or Ag-O interactions, respectively, involving the N-function of the respective DPPA-type ligand, and display direct interactions between one BF4 anion and both Ag(i) cations...
March 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28327741/new-polyaminocarboxylate-macrocycles-containing-phenolate-binding-units-synthesis-luminescent-and-relaxometric-properties-of-their-lanthanide-complexes
#7
Morgane Enel, Nadine Leygue, Stéphane Balayssac, Sophie Laurent, Chantal Galaup, Luce Vander Elst, Claude Picard
The synthesis of two new polyaminocarboxylate macrocycles incorporating one or two intracyclic phenol units (H4L(1) and H8L(2), respectively) is described. The 12-membered H4L(1) macrocycle leads to soluble and stable mononuclear Ln(III) complexes of [(L(1))Ln(H2O)2](-) composition (Ln = Eu, Tb and Gd) in aqueous solutions. In Tris buffer (pH 7.4), the [(L(1))Tb(H2O)2](-) complex displays a suitable efficiency for sensitized emission (ηsens = 48%) and a high luminescence quantum yield (Φ = 22%), which is worthy of note for a bis-hydrated terbium complex...
March 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28327654/constructive-quantum-interference-in-a-bis-copper-six-porphyrin-nanoring
#8
Sabine Richert, Jonathan Cremers, Ilya Kuprov, Martin D Peeks, Harry L Anderson, Christiane R Timmel
The exchange interaction, J, between two spin centres is a convenient measure of through bond electronic communication. Here, we investigate quantum interference phenomena in a bis-copper six-porphyrin nanoring by electron paramagnetic resonance spectroscopy via measurement of the exchange coupling between the copper centres. Using an analytical expression accounting for both dipolar and exchange coupling to simulate the time traces obtained in a double electron electron resonance experiment, we demonstrate that J can be quantified to high precision even in the presence of significant through-space coupling...
March 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28327590/elaboration-and-controlling-excited-state-double-proton-transfer-mechanism-of-2-5-bis-benzoxazol-2-yl-thiophene-3-4-diol
#9
Jinfeng Zhao, Yujun Zheng
In the present work, we theoretically illuminate the excited state double proton transfer (ESDPT) process about a novel synthesized system 2,5-bis(benzoxazol-2-yl)thiophene-3,4-diol (BBTD). Minor changes of both structure and charge redistribution deriving from photoexcitation result in obviously different excited state dynamical process. Exploration about our constructed S1-state potential energy surface (PES) indicates a stepwise ESDPT mechanism for BBTD. In addition, we present a new mechanism about regulating and controlling stepwise ESDPT process via external electric field...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28326789/evolution-of-nanoflowers-and-nanospheres-of-zinc-bisporphyrinate-tweezers-at-the-air-water-interface
#10
Fan Xie, Congcong Zhuo, Chuanjiang Hu, Ming Hua Liu
While the sophisticated Langmuir and Langmuir-Blodgett technique facilitates the fabrication of uniform ultrathin monolayer and films, it is also revealed as a powerful tool for the bottom-up constructions of the nanostructures through the air/water interface. In this paper, unique nanoflowers or nanospheres were constructed based on the synthesized m-phthalic diamide-linked Zinc bis-porphyrinate tweezers using the Langmuir and Langmuir-Blodgett (LB) technique. It was found that both the two tweezer type Zinc bisporphyrinates could form stable two-dimensional spreading films at the air/water interface, which could be subsequently transferred onto solid substrates by the vertical lifting method...
March 22, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28326515/anticancer-activity-of-a-trans-platinum-ii-complex-of-3-aminoflavone-to-ovarian-cancer-cells
#11
Magdalena Orzechowska, Małgorzata Fabijańska, Justyn Ochocki, Maciej Małecki
OBJECTIVES: Cisplatin is a classical anticancer drug used in the treatment of ovarian cancer. Unfortunately, the treatment is associated with numerous adverse effects. Studies concerning new platinum derivatives with less organ toxicity are conducted. The aim of this study was to analyse the effect of a new trans-platinum(II) complex of 3-aminoflavone on the viability and mortality of the cells from OVCAR 3 and CAOV 3 ovarian cancer cell lines and on the expression of the selected genes involved in the process of apoptosis...
2017: Ginekologia Polska
https://www.readbyqxmd.com/read/28326140/synthesis-and-optical-properties-of-new-5-aryl-substituted-2-5-bis-3-decyl-2-2-bithiophen-5-yl-1-3-4-oxadiazoles
#12
Anastasia Sergeevna Kostyuchenko, Tatyana Yu Zheleznova, Anton Jaroslavovich Stasyuk, Aleksandra Kurowska, Wojciech Domagala, Adam Pron, Alexander S Fisyuk
New photoluminescent donor-acceptor-donor (DAD) molecules, namely 5'-aryl-substituted 2,5-bis(3-decyl-2,2'-bithiophen-5-yl)-1,3,4-oxadiazoles were prepared by palladium-catalyzed coupling from readily available compounds such as ethyl 3-decyl-2,2'-bithiophene-5-carboxylate and aryl halides. The obtained compounds feature increasing bathochromic shifts in their emission spectra with increasing aryl-substituent size yielding blue to bluish-green emissions. At the same time, their absorption spectra are almost independent from the identity of the terminal substituent with λmax values ranging from 395 to 405 nm...
2017: Beilstein Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28325602/tripodal-squaramide-conjugates-as-highly-effective-transmembrane-anion-transporters
#13
Xiong-Jie Cai, Zhi Li, Wen-Hua Chen
Two tripodal squaramide conjugates having 4-(trifluoromethyl)phenyl and 3,5-bis(trifluoromethyl)phenyl substituents were synthesized and found to exhibit highly efficient transmembrane anion transport with the EC50 values being 0.14 and 0.75mol%, respectively. Though one of them has been reported to act as a strong anion receptor, in particular for sulfate anions, these two compounds exhibit no significant selectivity with respect to the tested monovalent anions and a very low level of activity in the presence of sulfate anions...
March 10, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28325530/in-vitro-measurements-of-burn-dressing-adherence-and-the-effect-of-interventions-on-reducing-adherence
#14
Michal Brichacek, Chenxi Ning, Justin P Gawaziuk, Song Liu, Sarvesh Logsetty
PURPOSE: There is a paucity of research on reducing dressing adherence. This is partly due to lack of an in vitro model, recreating the clinical variability of wounds. Previously we described an in vitro gelatin model to evaluate adherence in a standardized manner. We present evaluation of strategies to reduce adherence in six dressings. PROCEDURES: Dressing materials used were: PET (Control), fine mesh gauze coated in bismuth and petroleum jelly (BIS), nanocrystalline silver (NS), wide mesh polyester coated in polysporin ointment (WM), fine mesh cellulose acetate coated in polysporin ointment (FM), and soft silicone mesh (SIL)...
March 18, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28325223/interaction-of-homeopathic-potencies-with-the-water-soluble-solvatochromic-dye-bis-dimethylaminofuchsone-part-1-ph-studies
#15
Steven J Cartwright
INTRODUCTION: Previous studies have demonstrated the potential of solvatochromic dyes for investigating the physical chemistry of homeopathic potencies. RESULTS: Following examination of this class of dyes in organic solvents, results obtained using the positively solvatochromic dye Bis-dimethylaminofuchsone (BDF) in aqueous solution are now reported. Spectral changes observed with this dye in the presence of potencies are both substantial and reproducible. Studies across a wide range of pH values reveal an unusual pH dependence for the dye's interaction with homeopathic potencies...
February 2017: Homeopathy: the Journal of the Faculty of Homeopathy
https://www.readbyqxmd.com/read/28325086/application-of-bacterial-reverse-mutation-assay-for-detection-of-non-genotoxic-carcinogens
#16
Rewan Kanode, Saurabh Chandra, Sharad Sharma
Non-genotoxic carcinogens may play a significant role in development of cancer. Currently short-term assays for mutagenicity classify genotoxic carcinogens and lack the abilities to detect epigenetic carcinogens. The need to develop an endpoint always remains to recognize potentially carcinogenic agents employing rapid and practical bioassays. For this, the present study utilized TA98 and TA1537 tester strains of Salmonella typhimurium to evaluate four non-genotoxic carcinogenic agents (Coumarin, β-Myrcene, Bis(2-ethylhexyl) phthalate and trans-anethole)...
March 22, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28324832/determination-of-the-interconversion-energy-barrier-of-three-novel-pentahelicene-derivative-enantiomers-by-dynamic-high-resolution-liquid-chromatography
#17
Pavel Majek, Jan Krupcik, Zachary S Breitbach, Milan K Dissanayake, Peter Kroll, Aaron A Ruch, LeGrande M Slaughter, Daniel W Armstrong
Dynamic high resolution liquid chromatography (DHPLC) was used to determine the kinetic and thermodynamic activation parameters of interconversion of three novel pentahelicene derivatives {3,5-bis(trifluoromethyl)benzo[i]pentahelicene, naphtho[1,2-i]pentahelicene and 4-methoxybenzo[i]pentahelicene}. DHPLC was performed on a chiral isopropyl - carbamate cyclofructan 6 (LARIHC CF6-P) column under normal phase conditions. Variation of the column temperature and flow rate was used to study the interconversion process...
December 21, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28324628/linear-trinuclear-cobalt-complexes-with-o-phenylene-bis-silylamido-ligands
#18
Kirill Yu Monakhov, Jan van Leusen, Paul Koegerler, Emilie-Laure Zins, Esmaïl Alikhani, Moniek Tromp, Andreas Danopoulos, Pierre Braunstein
Transamination of [Co{N(SiMe3)2}2]2 with C6H4(NHSiiPr3)2 gave the linear trinuclear [(Coter{N(SiMe3)2}{μ-η-(o-C6H4(κNSiiPr3)2)2}Coint)] (1) (Coter, Coint = terminal, internal Co, respectively), with 3-coordinate Coter, and Coint 'sandwiched' between the o-phenylenes of the two ligands; experimental and computational data support CoII centres and ditopic o-amido-imino-cyclohexen-allyl ligands; magnetic studies reveal intermetallic ferromagnetic interactions and single-molecule magnet (SMM) character. One-electron reduction of 1 gave the salt 4 with the anion isostructural to 1...
March 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28324266/quality-of-life-in-patients-with-recurrent-breast-cancer-after-second-breast-conserving-therapy-in-comparison-with-mastectomy-the-german-experience
#19
Svenja Jendrian, Katharina Steffens, Barbara Schmalfeldt, Elena Laakmann, Corinna Bergelt, Isabell Witzel
BACKGROUND: Although some studies suggest that breast-conserving therapy (BCT) shows better psychosocial outcomes than mastectomy in patients with primary breast cancer, little is known about the outcomes of these surgical options in recurrent breast cancer. We investigated differences in overall survival and re-recurrence rates as well as psychosocial outcomes among patients who underwent BCT or mastectomy after the diagnosis of recurrent breast cancer in a single-center setting. METHODS: 124 of 186 eligible patients who underwent surgical treatment for breast cancer recurrence completed the questionnaires on quality of life (EORTC QLQ-C30 and -BR23), fear of progression (PA-F-KF), anxiety and depression (HADS), and body image (BIS)...
March 21, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28324119/the-impact-of-cognitive-training-in-substance-use-disorder-the-effect-of-working-memory-training-on-impulse-control-in-methamphetamine-users
#20
Samantha J Brooks, L Wiemerslage, K H Burch, S A Maiorana, E Cocolas, H B Schiöth, K Kamaloodien, D J Stein
OBJECTIVES: Impulsivity is a vulnerability trait for poor self-regulation in substance use disorder (SUD). Working memory (WM) training improves impulsivity and self-regulation in psychiatric disorders. Here we test WM training in methamphetamine use disorder (MUD). METHODS: There are 15 MUD patients receiving inpatient treatment as usual (TAU) and 20 who additionally completed WM cognitive training (CT) and 25 healthy controls (HC). MANCOVA repeated measures analyses examined changes in impulsivity and self-regulation at baseline and after 4 weeks...
March 21, 2017: Psychopharmacology
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