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https://www.readbyqxmd.com/read/29131927/direct-evidence-for-the-origin-of-bis-gold-intermediates-probing-gold-catalysis-with-mass-spectrometry
#1
Mei Lu, Yijin Su, Pengyi Zhao, Xiaohan Ye, Yi Cai, Xiaodong Shi, Eric Masson, Fengyao Li, J Larry Campbell, Hao Chen
Gold-catalyzed alkyne hydration was studied using in-situ reacting mass spectrometry (MS) technology. By monitoring the reaction process in solution under different conditions (regular and very diluted catalyst concentrations, different pHs) and examining the reaction occurrence in the early reaction stage (1-2 ms after mixing) with MS, we collected a series of experimental evidence to support that the bisgold complex is a key reaction intermediate. Furthermore, both experimental and computational studies confirmed that the σ,π-bisgold complexes are not active intermediate toward nucleophilic addition...
November 13, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29123886/sudden-cerebral-depression-detected-by-bispectral-index-monitoring-in-cryptococcal-meningitis-with-elevated-near-fatal-cerebrospinal-fluid-pressure
#2
Hironori Matsumoto, Suguru Annen, Kensuke Umakoshi, Jun Takeba, Satoshi Kikuchi, Yuki Nakabayashi, Naoki Moriyama, Muneaki Ohshita, Mayuki Aibiki
Case: An increase in cerebrospinal fluid pressure (CSFP) is usually prominent in cryptococcal meningitis, which has a high mortality rate, so aggressive management to control CSFP is crucial. In this case, a 40-year-old-man survived cryptococcal meningitis treated with continuous spinal drainage under bispectral index (BIS) monitoring. He unexpectedly showed hypertension, went into a coma, and even loss his light reflexes due to CSFP elevation. His BIS values had abruptly dropped before developing these symptoms, but dramatically recovered after lumbar puncture drainage, suggesting that BIS monitoring could reflect cerebral function changes due to CSFP alternations...
July 2017: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/29102057/thin-layer-chromatography-coupled-with-high-performance-liquid-chromatography-for-determining-tetrabromobisphenol-a-s-and-their-derivatives-in-soils
#3
Aifeng Liu, Zhaoshuang Shen, Yong Tian, Rongguang Shi, Yi Liu, Zongshan Zhao, Mo Xian
As brominated flame retardants (BFRs), tetrabromobisphenol A/S (TBBPA/S) and their derivatives have raised wide concerns owing to their widely usage, distributions and adverse effects on human health, thus monitoring these BFRs was urgently needed. In this study, a rapid and cost-effective method based on thin-layer chromatography (TLC) sample pre-treatment coupled with high performance liquid chromatography-diode array detector (HPLC-DAD) (UV=214nm) was developed for determining TBBPA/S and their derivatives in soils, including TBBPA, TBBPA bis(allyl ether) (TBBPA-BAE), TBBPA bis(2,3-dibromopropyl ether) (TBBPA-BDBPE), TBBPS bis(allyl ether) (TBBPS-BAE) and TBBPS bis(2,3-dibromopropyl ether) (TBBPS-BDBPE)...
October 20, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29066883/mri-guided-targeting-delivery-of-doxorubicin-with-reduction-responsive-lipid-polymer-hybrid-nanoparticles
#4
Bo Wu, Shu-Ting Lu, Kai Deng, Hui Yu, Can Cui, Yang Zhang, Ming Wu, Ren-Xi Zhuo, Hai-Bo Xu, Shi-Wen Huang
In recent years, there has been increasing interest in developing a multifunctional nanoscale platform for cancer monitoring and chemotherapy. However, there is still a big challenge for current clinic contrast agents to improve their poor tumor selectivity and response. Herein, we report a new kind of Gd complex and folate-coated redox-sensitive lipid-polymer hybrid nanoparticle (Gd-FLPNP) for tumor-targeted magnetic resonance imaging and therapy. Gd-FLPNPs can simultaneously accomplish diagnostic imaging, and specific targeting and controlled release of doxorubicin (DOX)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29045997/the-influence-of-bis-monitoring-on-sedative-dose-in-pediatric-patients-undergoing-open-muscle-biopsies-a-randomized-controlled-trial
#5
Eva Tschiedel, Oliver Müller, Adela Della Marina, Ursula Felderhoff-Müser, Christian Dohna-Schwake
Background The use of Propofol and Remifentanil for analgosedation in children is common and safe. For sedation monitoring clinical scores as Comfort Score (CS) as well as bispectral index (BIS) are frequently applied. The impact of BIS for sedation monitoring in pediatric patients is still under debate. This prospective study aims to investigate whether dual sedation monitoring of CS and BIS compared with monitoring of CS alone during muscle biopsies in children can reduce sedative doses, reduce awakening time and prevent complications...
October 18, 2017: Klinische Pädiatrie
https://www.readbyqxmd.com/read/29027770/bispectral-index-bis-and-non-bis-anesthetic-protocols-on-postoperative-recovery-outcomes-a-systematic-review-and-meta-analysis
#6
Min-Hsien Chiang, Shao-Chun Wu, Shih-Wei Hsu, Jo-Chi Chin
BACKGROUND: The study aimed to compare bispectral index (BIS) and non-BIS anesthetic protocols on postoperative recovery outcomes. METHODS: Medline, PubMed, Cochrane, EMBASE, and Google Scholar databases were searched until January 21, 2016. RESULTS: Twenty-six studies were included with a total of 9537 patients. BIS monitoring was significantly associated with shorter time to eye opening (P=0.001), time to extubation (P<0.001), and time to orientation (P=0...
October 12, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/29017455/the-ec90-of-remifentanil-for-blunting-cardiovascular-responses-to-head-fixation-for-neurosurgery-under-total-intravenous-anesthesia-with-propofol-and-remifentanil-based-on-bispectral-index-monitoring-estimation-with-the-biased-coin-up-and-down-sequential-method
#7
Jung-Man Lee, Jae-Hyon Bahk, Young-Jin Lim, Jiwon Lee, Leerang Lim
BACKGROUND: Head fixation can induce hemodynamic instability. Remifentanil is commonly used with propofol for total intravenous anesthesia (TIVA) during neurosurgery. This study investigated the 90% effective concentration (EC90) of remifentanil for blunting of cardiovascular responses to head fixation during neurosurgery via bispectral index (BIS) monitoring. METHODS: Fifty patients undergoing neurosurgery requiring head fixation were enrolled. This study was performed using the biased coin up-and-down design sequential method (BCD)...
October 10, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28989831/intraoperative-awareness-and-recall-a-comparative-study-of-dexmedetomidine-and-propofol-in-cardiac-surgery
#8
Tufail Ahmad, Nadeem A Sheikh, Nihida Akhter, Bashir A Dar, Riyaz Ahmad
Background Awareness during general anesthesia is undesired and unanticipated patient wakefulness during surgery or recall of intraoperative events. Incidence of awareness in patients undergoing cardiac surgery is significantly higher than the overall incidence of 1% during general surgery. Awareness during cardiac surgery can be prevented by a number of methods. One such method is the supplemental, intraoperative use of sedative agents. Propofol, a bisubstituted phenol, is an intravenous general anesthetic that has been shown to reduce the incidence of awareness...
August 5, 2017: Curēus
https://www.readbyqxmd.com/read/28985693/assessing-the-depth-of-isoflurane-anaesthesia-during-cardiopulmonary-bypass
#9
Ka Ting Ng, R Peter Alston, George Just, Chris McKenzie
INTRODUCTION: Bispectral index (BIS) and monitoring of end-tidal concentration may be associated with a reduction in the incidence of awareness during volatile-based general anaesthesia. An analogue of end-tidal concentration during cardiopulmonary bypass (CPB) is measuring exhausted isoflurane concentration from the oxygenator as an estimate to blood and, so, brain concentration. The aim of this study was to determine the relationships between oxygenator exhaust and blood concentrations of isoflurane and the BIS score during CPB when administering isoflurane into the sweep gas supply to the oxygenator...
October 1, 2017: Perfusion
https://www.readbyqxmd.com/read/28984090/bispectral-index-monitored-sevoflurane-requirement-might-be-decreased-in-individuals-with-major-depressive-disorder
#10
Veysel Erden, Cihan Güler, Seda Seven, Sevda Bağ, Ali G Kara, Şenay Kirgezen
BACKGROUND: GABA (γ-aminobutyric acid) is the primary inhibitory neurotransmitter in the CNS and well-known target for general anesthetics. In addition, the dysregulation of GABA could be involved in the etiology of MDD. In this study, we aimed to determine whether MDD has any effect on anesthetic requirement measured by bispectral index (BIS). METHODS: This study was designed as a prospective, observational study, registered ANZCTR (ACTRN12616001295437), with institutional review board approval and written informed consent...
October 4, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28966688/cnidium-officinale-makino-extract-induces-apoptosis-through-activation-of-caspase-3-and-p53-in-human-liver-cancer-hepg2-cells
#11
Heeok Hong, Jeong Cheol An, Joseph F de La Cruz, Seong-Gu Hwang
A number of diverse studies have reported the anticancer properties of Cnidium officinale Makino (CO). However, the apoptotic effect of this traditional medicinal herb in human hepatocellular carcinoma cells (HepG2) remains to be elucidated. Therefore, the present study investigated the ability of CO to reduce cell viability through apoptotic pathways. Cell viability was determined using the 2,3-bis [2-methyloxy-4-nitro-5-sulfophenyl]-2H-tetrazolium-5-carboxanilide assay. CO extract-induced apoptosis in HepG2 cells was assessed by Hoechst 33258 staining...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28958609/the-importance-of-bilateral-monitoring-of-cerebral-oxygenation-nirs-clinical-case-of-asymmetry-during-cardiopulmonary-bypass-secondary-to-previous-cerebral-infarction
#12
S Matcan, P Sanabria Carretero, M Gómez Rojo, L Castro Parga, F Reinoso-Barbero
Cerebral oximetry based on near infrared spectroscopy (NIRS) technology is used to determine cerebral tissue oxygenation. We hereby present the clinical case of a 12-month old child with right hemiparesis secondary to prior left middle cerebral artery stroke 8 months ago. The child underwent surgical enlargement of the right ventricular outflow tract (RVOT) with cardiopulmonary bypass. During cardiopulmonary bypass, asymmetric NIRS results were detected between both hemispheres. The utilization of multimodal neuromonitoring (NIRS-BIS) allowed acting on both perfusion pressure and anesthetic depth to balance out the supply and demand of cerebral oxygen consumption...
September 25, 2017: Revista Española de Anestesiología y Reanimación
https://www.readbyqxmd.com/read/28956587/hydrazine-functionalized-probes-for-chromogenic-and-fluorescent-ratiometric-sensing-of-ph-and-f-experimental-and-dft-studies
#13
Additi Roy Chowdhury, Amita Mondal, Biswajit Gopal Roy, Jagadeesh C Bose K, Sudit Mukhopadhyay, Priyabrata Banerjee
Two novel hydrazine based sensors, BPPIH (N(1),N(3)-bis(perfluorophenyl)isophthalohydrazide) and BPBIH (N(1'),N(3')-bis(perfluorobenzylidene)isophthalohydrazide), are presented here. BPPIH is found to be a highly sensitive pH sensor in the pH range 5.0 to 10.0 in a DMSO-water solvent mixture with a pKa value of 9.22. Interesting optical responses have been observed for BPPIH in the above mentioned pH range. BPBIH on the other hand turns out to be a less effective pH sensor in the above mentioned pH range. The increase in fluorescence intensity at a lower pH for BPPIH was explained by using density functional theory...
November 8, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28952544/estimating-extrinsic-dyes-for-fluorometric-online-monitoring-of-antibody-aggregation-in-cho-fed-batch-cultivations
#14
Karen Schwab, Friedemann Hesse
Multi-wavelength fluorescence spectroscopy was evaluated in this work as tool for real-time monitoring of antibody aggregation in CHO fed-batch cultivations via partial least square (PLS) modeling. Therefore, we used the extrinsic fluorescence dyes 1-anilinonaphthalene-8-sulfonate (ANS), 4,4'-bis-1-anilinonaphthalene-8-sulfonate (Bis-ANS), or Thioflavin T (ThT) as medium additives. This is a new application area, since these dyes are commonly used for aggregate detection during formulation development. We determined the half maximum inhibitory concentrations of ANS (203 ± 11 µmol·L(-1)), Bis-ANS (5 ± 0...
July 24, 2017: Bioengineering
https://www.readbyqxmd.com/read/28946920/role-of-bispectral-index-monitoring-and-burst-suppression-in-prognostication-following-out-of-hospital-cardiac-arrest-a-systematic-review-protocol
#15
Leanne Eveson, Marcela Vizcaychipi, Shashank Patil
BACKGROUND: Out-of-hospital cardiac arrest (OHCA) is associated with significant mortality or may have a poor neurological outcome. Various community-training programmes have improved practices like bystander cardiopulmonary resuscitation (CPR) and early defibrillation using automated external defibrillator (AED). Post-resuscitation care has also changed significantly in the millennium. Interventions like targeted temperature management (TTM), avoidance of hyperoxia and emergency cardiac catheterisation have given patients a chance of a better neurological outcome...
September 25, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28945077/a-target-lighted-dsdna-indicator-for-high-performance-monitoring-of-mercury-pollution-and-its-antagonists-screening
#16
Zhihe Qing, Lixuan Zhu, Xiaoxuan Li, Sheng Yang, Zhen Zou, Jingru Guo, Zhong Cao, Ronghua Yang
As well-known, the excessive discharge of heavy-metal mercury not only destroys the ecological environment, bust also leads to severe damage of human health after ingestion via drinking and bioaccumulation of food chains, and mercury ion (Hg(2+)) is designated as one of most prevalent toxic metal ions in drinking water. Thus, the high-performance monitoring of mercury pollution is necessary. Functional nucleic acids have been widely used as recognition probes in biochemical sensing. In this work, a carbazole derivative, ethyl-4-[3,6-bis(1-methyl-4-vinylpyridium iodine)-9H-carbazol -9-yl)] butanoate (EBCB), has been synthesized and found as a target-lighted DNA fluorescent indicator...
October 3, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28929556/high-temperature-formation-of-a-functional-film-at-the-cathode-electrolyte-interface-in-lithium-sulfur-batteries-an-in%C3%A2-situ-afm-study
#17
Shuang-Yan Lang, Yang Shi, Yu-Guo Guo, Rui Wen, Li-Jun Wan
Lithium-sulfur (Li-S) batteries have been attracting wide attention for their promising high specific capacity. A deep understanding of Li-S interfacial mechanism including the temperature (T) effect is required to meet the demands for battery modification and systematic study. Herein, the interfacial behavior during discharge/charge is investigated at high temperature (HT) of 60 °C in an electrolyte based on lithium bis(fluorosulfonyl) imide (LiFSI). By in situ atomic force microscopy (AFM), dynamic evolution of insoluble Li2 S2 and Li2 S is studied at the nanoscale...
September 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28925264/space-environment-effects-on-flexible-low-voltage-organic-thin-film-transistors
#18
Laura Basiricò, Alberto Francesco Basile, Piero Cosseddu, Simone Gerardin, Tobias Cramer, Marta Bagatin, Andrea Ciavatti, Alessandro Paccagnella, Annalisa Bonfiglio, Beatrice Fraboni
Organic electronic devices fabricated on flexible substrates are promising candidates for applications in environments where flexible, lightweight, and radiation hard materials are required. In this work, device parameters such as threshold voltage, charge mobility, and trap density of 13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene)-based organic thin-film transistors (OTFTs) have been monitored for performing electrical measurements before and after irradiation by high-energy protons. The observed reduction of charge carrier mobility following irradiation can be only partially ascribed to the increased trap density...
October 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28918427/safety-of-monitored-anesthesia-care-using-propofol-based-sedation-for-pleuroscopy
#19
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/28906151/photopolymerization-based-synthesis-of-iron-oxide-nanoparticle-embedded-pnipam-nanogels-for-biomedical-applications
#20
Daniel J Denmark, Robert H Hyde, Charlotte Gladney, Manh-Huong Phan, Kirpal S Bisht, Hariharan Srikanth, Pritish Mukherjee, Sarath Witanachchi
Conventional therapeutic techniques treat patients by delivering biotherapeutics to the entire body. With targeted delivery, biotherapeutics are transported to the afflicted tissue reducing exposure to healthy tissue. Targeted delivery devices are minimally composed of a stimuli responsive polymer allowing triggered release and magnetic nanoparticles enabling targeting as well as alternating magnetic field (AMF) heating. Although more traditional methods, like emulsion polymerization, have been used to realize such devices, the synthesis is problematic...
November 2017: Drug Delivery
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