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https://www.readbyqxmd.com/read/28640168/degree-of-postictal-suppression-depends-on-seizure-induction-time-in-magnetic-seizure-therapy-and-electroconvulsive-therapy
#1
Sarah Kayser, Bettina H Bewernick, Martin Soehle, Christina Switala, Sabrina M Gippert, Nadine Dreimueller, Thomas E Schlaepfer
OBJECTIVES: Anesthesia is required for both magnetic seizure therapy (MST) and electroconvulsive therapy (ECT), although it has anticonvulsant properties. In this case, bispectral index (BIS) monitoring, a specific electroencephalogram-derived monitoring, can be used to find the optimal seizure induction time during anesthesia to elicit adequate seizures. A measurement of seizure adequacy in electroencephalogram is the postictal suppression. The purpose of this study was to investigate the influence of seizure induction time on the degree of postictal suppression by comparing BIS versus no-BIS monitoring in MST and ECT...
June 20, 2017: Journal of ECT
https://www.readbyqxmd.com/read/28639673/observing-the-real-time-formation-of-phosphine-ligated-gold-clusters-by-electrospray-ionization-mass-spectrometry
#2
Marshall R Ligare, Grant E Johnson, Julia Laskin
The early stages of reduction and nucleation of ligated gold clusters in solution are largely unknown due, in part, to high reaction rates and the inherent complexity of the process. This study demonstrates that the addition of a diphosphine ligand, 1-4-bis(diphenylphosphino)butane (L(4)) to a methanolic solution of the gold precursor, chloro(triphenylphosphine)gold(I) (Au(PPh3)Cl), results in the initial formation of organometallic complexes of the type [Au(L(4))x(L(4)O)y(PPh3)z](+). These initial complexes lower the rate of gold reduction so that the reaction can be directly monitored over time from 1 min to over an hour using on-line electrospray ionization mass spectrometry (ESI-MS)...
June 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28638473/rapid-fluorescence-imaging-of-spinal-cord-following-epidural-administration-of-a-nerve-highlighting-fluorophore
#3
Wanguo Liu, Rui Gu, Qingsan Zhu, Chunsheng Xiao, Lanfeng Huang, Xinming Zhuang, Jingzhe Zhang, Lidi Liu, Ben Ma, Huailin Yang, Jianchao Ma, Zhipeng Hu, Chenglin Tang, Shuhua Zhao, Xuesi Chen
Iatrogenic spinal cord injury (SCI) is the most devastating complication of spine surgery, which usually results in permanent and serious disabilities of patients. Improvement of the visualization and discrimination of the spinal cord is critical for accuracy and safety during surgery; however, to date, there is no suitable technology to fulfill this clinical need. Here, we first show an efficient and rapid fluorescence imaging of the spinal cord in rabbit by epidural administration of a nerve-highlighting fluorophore, i...
2017: Theranostics
https://www.readbyqxmd.com/read/28631482/carbohydrate-bis-acetal-based-substrates-as-tunable-fluorescence-quenched-probes-for-monitoring-exo-glycosidase-activity
#4
Samy Cecioni, David J Vocadlo
Tunable Förster resonance energy transfer (FRET)-quenched substrates are useful for monitoring the activity of various enzymes within their relevant physiological environments. Development of FRET-quenched substrates for exo-glycosidases, however, has been hindered by their constrained pocket-shaped active sites. Here we report the design of a new class of substrate that overcomes this problem. These Bis-Acetal-Based Substrates (BABS) bear a hemiacetal aglycon leaving group that tethers fluorochromes in close proximity, also positioning them distant from the active site pocket...
June 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28631050/analgesia-nociception-index-ani-monitoring-in-patients-with-thoracic-paravertebral-block-a-randomized-controlled-study
#5
Nurseda Dundar, Alparslan Kus, Yavuz Gurkan, Kamil Toker, Mine Solak
The goal of the study was to evaluate the effectiveness of analgesia nociception index (ANI) monitoring during intraoperative period for patients with thoracic paravertebral block (TPVB) undergoing breast surgery under general anesthesia. This prospective randomized trial was performed after receiving ethics committee approval in 44 patients who were scheduled to undergo breast surgery under general anesthesia. TPVB was performed in the preoperative period using 20 mL of bupivacaine 0.25% at T4 level. Anesthesia maintenance was provided with sevoflurane in O2: air mixture and remifentanil infusion...
June 19, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28621182/-non-intubated-uniportal-video-assisted-thoracic-surgery-vats-lobectomy-as-a-new-procedure-in-our-department
#6
József Furák, Zsolt Szabó, Theodor Horváth, Tibor Géczi, Balázs Pécsy, Tibor Németh, Aurél Ottlakán, Zsolt Molnár, György Lázár
AIM: Due to the emerging experience in VATS (video assisted thoracic surgery) lobectomies, in some centers the so called "non-intubated" VATS lobectomies (NITS - non-intubated thoracic surgery) gained increased authority, during which endotracheal intubation and muscle relaxation of the patient is not carried out, thus surgery is being performed with the patient breathing spontaneously. The recent study deals with our initial experience gained during uniportal NITS VATS lobectomies. PATIENTS AND METHOD: Between 24...
June 2017: Magyar Sebészet
https://www.readbyqxmd.com/read/28620695/liposomes-modified-by-mono-and-bis-phthalocyanines-a-comprehensive-epr-study
#7
Dariusz Man, Rudolf Słota, Anna Kawecka, Grzegorz Engel, Gabriela Dyrda
The impact of selected metallophthalocyanines, featuring diverse molecular structure, upon the fluidity of liposome membranes was studied using the spin label EPR technique. The "mono"-type MPc's (M = Zn, Sn; Pc = C32H16N8 is the phthalocyanine ligand) and sandwich LnPc2 complexes (Ln = Nd, Sm, Gd) were explored. Liposomes were obtained in a sonication process, from egg yolk lecithin (EYL) in water. TEMPO and 16-DOXYL spin labels were used to monitor the peripheral and central part of the lipid double layer, respectively, which allowed to localize the phthalocyanine additive within the bilayer, as well as to perform independent measurements of changes in fluidity upon addition thereof...
June 2017: European Physical Journal. E, Soft Matter
https://www.readbyqxmd.com/read/28616347/intraoperative-care-for-aortic-surgery-using-circulatory-arrest
#8
REVIEW
Félix Ezequiel Fernández Suárez, David Fernández Del Valle, Adrián González Alvarez, Blanca Pérez-Lozano
The total circulatory arrest (CA) is necessary to achieve optimal surgical conditions in certain aortic pathologies, especially in those affecting the ascending aorta and aortic arch. During this procedure it is necessary to protect all the organs of ischemia, especially those of the central nervous system and for this purpose several strategies have been developed. The first and most important protective method is systemic hypothermia. The degree of hypothermia and the route of application have been evolving and currently tend to use moderate hypothermia (MH) (20...
May 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28602285/electrochemical-preparation-of-standard-solutions-of-pb-ii-ions-in-ionic-liquid-for-analysis-of-hydrophobic-samples-the-olive-oil-case
#9
M Antonietta Baldo, Angela M Stortini, Ligia M Moretto, Michael Ongaro, Marco Roman, Paolo Ugo
In this paper we present an electrochemical approach to prepare standard solutions of metal ions in a room temperature ionic liquid (IL), which can find useful application for analysis in hydrophobic matrices. The method, developed here for the case of lead ions, is based on the galvanostatic dissolution of a lead anode dipped directly in a suitable IL, namely tri-hexyl(tetradecyl)phosphonium bis (trifluoromethylsulfonyl) imide ([P14,6,6,6](+)[NTf2](-)). After each oxidation step, the metal dissolution process in the IL solutions was monitored by cyclic voltammetric measurements at a glassy carbon disk electrode...
September 1, 2017: Talanta
https://www.readbyqxmd.com/read/28599370/comparisons-of-field-and-laboratory-estimates-of-risk-of-ddts-from-contaminated-sediments-to-humans-that-consume-fish-in-palos-verdes-california-usa
#10
Scott Coffin, Jay Gan, Daniel Schlenk
Calculating risk from seafood exposure to persistent organic pollutants continues to be problematic as estimates of exposure from diet require extensive monitoring of fish species and limited assessments of bioavailability from sediments where the contaminants tend to reside. Previous studies in our laboratory utilized a laboratory-based isotope dilution method (IDM) to estimate the bioavailability of DDT [1,1,1-trichloro-2, 2-bis(p-chloro-phenyl)ethane] and its metabolites from sediment to biota from a superfund site on the shelf of the Palos Verdes (PVS) Peninsula in California (USA)...
June 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28594004/influence-of-the-alkyl-side-chain-length-on-the-ultrafast-vibrational-dynamics-of-1-alkyl-3-methylimidazolium-bis-trifluoromethylsulfonyl-amide-cnmimntf2-ionic-liquids
#11
Mehdi Mohammad Kazemi, Mahesh Namboodiri, Patrice Donfack, Arnulf Materny, Daniela Kerlé, Bernd Rathke, Johannes Kiefer
Probing the vibrational dynamics of 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide (CnmimNTf2) ionic liquids (ILs) using femtosecond time-resolved coherent anti-Stokes Raman scattering (fs-CARS) has indicated the ultrafast vibrational energy transfer between counter ions which is governed by interionic interactions and facilitated by hydrogen bonds. In this study, fs-CARS is used to investigate the ultrafast dynamics of the vibrational modes of the CnmimNTf2 ILs with n = 6, 8, 10, and 12 in a spectral region, which involves the imidazolium ring and the alkyl side-chain vibrations...
June 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28593372/simultaneous-determination-of-dechloranes-polybrominated-diphenyl-ethers-and-novel-brominated-flame-retardants-in-food-and-serum
#12
Carlos Sales, Giulia Poma, Govindan Malarvannan, Tania Portolés, Joaquin Beltrán, Adrian Covaci
A sensitive method for the simultaneous quantification of dechloranes, polybrominated diphenyl ethers (PBDEs) and novel brominated flame retardants (NBFRs) has been developed for gas chromatography (GC) coupled to tandem mass spectrometry operating in electron capture negative ionization (ECNI) mode. The major advance has been achieved by combining selected ion monitoring (SIM) and multiple reaction monitoring (MRM) modes in well-defined time windows, to determine dechloranes, PBDEs and NBFRs at picogram per gram level in one single analysis in complex matrix biological samples...
June 8, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28582612/investigation-of-phenols-activity-in-early-stage-oxidation-of-edible-oils-by-electron-paramagnetic-resonance-and-19-f-nmr-spectroscopies-using-novel-lipid-vanadium-complexes-as-radical-initiators
#13
Chryssoula Drouza, Anthi Dieronitou, Ioanna Hadjiadamou, Marios Stylianou
A novel dynamic method for the investigation of the phenols activity in early stage oxidation of edible oils based on the formation of α-tocopheryl radicals initiated by oil-soluble vanadium complexes is developed. Two new vanadium complexes in oxidation states V and IV were synthesized by reacting 2,2'-((2-hydroxyoctadecyl)azanediyl)bis(ethan-1-ol) (C18DEA) with [VO(acac)2] and 1-(bis(pyridin-2-ylmethyl)amino)octadecan-2-ol (C18DPA) with VOCl2. Addition of a solution of either complex in edible oils resulted in the formation of α-tocopheryl radical, which was monitored by electron paramagnetic resonance (EPR) spectroscopy...
June 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28576003/correlating-cytotoxicity-to-elution-behaviors-of-composite-resins-in-term-of-curing-kinetic
#14
Junquan Meng, Huichuan Yang, Man Cao, Lei Li, Qing Cai
Cytotoxicity of photocurable composite resins is a key issue for their safe use in dental restoration. Curing kinetic and elution behaviors of the composite resin would have decisive effects on its cytotoxicity. In this study, composite resins composed of bisphenol-glycidyl dimethacrylate (Bis-GMA), triethyleneglycol dimethacrylate (TEGDMA), camphorquinone (CQ), N,N-dimethylaminoethyl methacrylate (DMAEMA) and barium glass powders were prepared by setting the photoinitiators CQ/DMAEMA at 0.5wt%, 1wt% or 3wt% of the total weight of Bis-GMA/TEGDMA...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28575823/passive-sampling-for-spatial-and-temporal-monitoring-of-organic-pollutants-in-surface-water-of-a-rural-urban-river-in-kenya
#15
Bilha Saina Chepchirchir, Albrecht Paschke, Gerrit Schüürmann
Passive sampling is an emerging monitoring strategy for surface waters and can be applied in a range of environments including remote locations. Silicone rubber (SR) as a robust single-phase passive sampler was applied to characterize the spatial and temporal variability of organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), polyaromatic hydrocarbons (PAHs) and three phthalates, namely, dibutyl phthalate (DBP), benzyl butyl phthalate (BBP) and bis(2-ethylhexyl)phthalate (DEHP) in a tropical river traversing rural and urban catchments...
May 30, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28569387/synthesis-and-in-vitro-antioxidant-activity-study-of-some-new-piperazinyl-flavone-compounds
#16
Paweł Berczyński, Aleksandra Kładna, Irena Kruk, Elmas Sarı, Hatice Nehir Murat, Oya Bozdağ Dündar, Hassan Y Aboul-Enein
Flavones exhibit a variety of beneficial effects and are well known for their medicinal importance in several diseases, including cardiovascular, neurodegenerative and cancer. The inclusion of the piperazine ring to the flavone backbone is an important strategy in drug discovery but only a few studies have synthesized piperazinyl flavone compounds to test their biological activity. While there is a major focus on the antioxidant properties of drugs in therapy of several diseases of inflammatory origin, we synthesized a series of the novel piperazinyl flavone analogues bearing the phenyl ring with different substituents...
June 1, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28567244/foldable-glycoprobes-capable-of-fluorogenic-crosslinking-of-biomacromolecules
#17
Kai-Bin Li, Na Li, Yi Zang, Guo-Rong Chen, Jia Li, Tony D James, Xiao-Peng He, He Tian
Small-molecular probes capable of monitoring and interfering with the activity of biomacromolecules - such as polysaccharides, nucleotides and proteins - are of paramount importance to the advancement of life science. However, such probes that can detect and simultaneously modulate the construction of biomacromolecules are elusive. Here we report a fluorogenic, foldable glycoprobe that can recognize and assemble a protein receptor in a synchronous fashion. The glycoprobe synthesized by introducing a glycoligand (for protein recognition) to a bola-type bis-fluorophore conjugate shows a "self-shielded" fluorescence in the folded state...
October 1, 2016: Chemical Science
https://www.readbyqxmd.com/read/28565910/photochemical-energy-storage-and-electrochemically-triggered-energy-release-in-the-norbornadiene-quadricyclane-system-uv%C3%A2-photochemistry-and-ir-spectroelectrochemistry-in-a-combined-experiment
#18
Olaf Brummel, Fabian Waidhas, Udo Bauer, Yanlin Wu, Sebastian Bochmann, Hans-Peter Steinrück, Christian Papp, Julien Bachmann, Jörg Libuda
The two valence isomers norbornadiene (NBD) and quadricyclane (QC) enable solar energy storage in a single molecule system. We present a new photoelectrochemical infrared reflection absorption spectroscopy (PEC-IRRAS) experiment, which allows monitoring of the complete energy storage and release cycle by in situ vibrational spectroscopy. Both processes were investigated, the photochemical conversion from NBD to QC using the photosensitizer 4,4'-bis(dimethylamino)benzophenone (Michler's ketone, MK) and the electrochemically triggered cycloreversion from QC to NBD...
June 9, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28551058/-anesthesia-recovery-comparison-between-remifentanil-propofol-and-remifentanil-desflurane-guided-by-bispectral-index-%C3%A2-monitoring
#19
Raphael Grossi Rocha, Eduardo Giarola Almeida, Lara Moreira Mendes Carneiro, Natália Farias de Almeida, Walkíria Wingester Vilas Boas, Renato Santiago Gomez
BACKGROUND AND OBJECTIVES: There is a strong demand for fast and predictable anesthesia recovery with few side effects. Choice of the hypnotic agent could impact on that. This study investigated the differences between recoveries after remifentanil-propofol and remifentanil-desflurane anesthesias guided by bispectral index (BIS(®)). METHODS: Forty patients were randomly assigned into 2 groups according to the anesthesia technique applied: remifentanil-propofol (REM-PRO) and remifentanil-desflurane (REM-DES)...
May 25, 2017: Revista Brasileira de Anestesiologia
https://www.readbyqxmd.com/read/28543642/bidirectional-superior-cavopulmonary-anastomosis-with-or-without-cardiopulmonary-bypass-a-randomized-study
#20
Sachin Talwar, Anish Gupta, Ashima Nehra, Neeti Makhija, Poonam Malhotra Kapoor, Vishnubhatla Sreenivas, Shiv Kumar Choudhary, Balram Airan
OBJECTIVES: This study aims to compare the bidirectional superior cavopulmonary anastomosis (BDG) with or without cardiopulmonary bypass (CPB). METHODS: 100 patients undergoing BDG were randomized into two groups: Off-CPB or on-CPB groups. All patients underwent near-infrared spectrophotometry (NIRS) and bispectral index (BIS) monitoring and pre- and postoperative serum 100 beta protein measurements (Sβ100) and neuro-cognitive evaluation. Postoperative intensive care unit (ICU) parameters were also studied...
May 21, 2017: Journal of Cardiac Surgery
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