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https://www.readbyqxmd.com/read/28732986/continuous-flow-ultrasound-assisted-oxidative-desulfurization-uaod-process-an-efficient-diesel-treatment-by-injection-of-the-aqueous-phase
#1
Masoud Rahimi, Shahrokh Shahhosseini, Salman Movahedirad
A new continuous-flow ultrasound assisted oxidative desulfurization (UAOD) process was developed in order to decrease energy and aqueous phase consumption. In this process the aqueous phase is injected below the horn tip leading to enhanced mixing of the phases. Diesel fuel as the oil phase with sulfur content of 1550ppmw and an appropriate mixture of hydrogen peroxide and formic acid as the aqueous phase were used. At the first step, the optimized condition for the sulfur removal has been obtained in the batch mode operation...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732593/multisegment-injections-improve-peptide-identification-rates-in-capillary-zone-electrophoresis-based-bottom-up-proteomics
#2
Danielle A Boley, Zhenbin Zhang, Norman J Dovichi
While capillary zone electrophoresis (CZE) provides dramatically improved numbers of peptide identifications compared with reversed-phase chromatography for bottom-up proteomics of mass limited samples, CZE inevitably produces lower numbers of peptide identifications than RPLC for larger samples. One reason for this poorer performance is the dead time between injection of samples and subsequent appearance of the fastest moving component. This dead time is typically 25% of the separation window in CZE, but is only 5% of the separation window in gradient elution RPLC...
July 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28730932/effect-site-concentration-of-remifentanil-required-to-blunt-haemodynamic-responses-during-tracheal-intubation-a-randomized-comparison-between-single-and-double-lumen-tubes
#3
Tae Kyong Kim, Deok Man Hong, Seo Hee Lee, Hyesun Paik, Se Hee Min, Jeong-Hwa Seo, Chul-Woo Jung, Jae-Hyon Bahk
Objective To investigate the effect-site concentration of remifentanil required to blunt haemodynamic responses during tracheal intubation with a single-lumen tube (SLT) or a double-lumen tube (DLT). Methods Patients scheduled for thoracic surgery requiring one-lung ventilation were randomly allocated to either the SLT or DLT group. All patients received a target-controlled infusion of propofol and a predetermined concentration of remifentanil. Haemodynamic parameters during intubation were recorded. The effect-site concentration of remifentanil was determined using a delayed up-and-down sequential allocation method...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28729892/reversible-charge-trapping-in-bis-carbazole-diimide-redox-polymers-with-complete-luminescence-quenching-enabling-nondestructive-read-out-by-resonance-raman-spectroscopy
#4
Luuk Kortekaas, Federico Lancia, Jorn D Steen, Wesley R Browne
The coupling of substituted carbazole compounds through carbon-carbon bond formation upon one-electron oxidation is shown to be a highly versatile approach to the formation of redox polymer films. Although the polymerization of single carbazole units has been proposed earlier, we show that by tethering pairs of carbazoles double sequential dimerization allows for facile formation of redox polymer films with fine control over film thickness. We show that the design of the monomers and in particular the bridging units is key to polymer formation, with the diaminobenzene motif proving advantageous, in terms of the matching to the redox potentials of the monomer and polymer film and thereby avoiding limitations in film thickness (autoinsulation), but introduces unacceptable instability due to the intrinsic redox activity of this moiety...
July 13, 2017: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
https://www.readbyqxmd.com/read/28721732/radical-addition-insertion-cyclization-cascade-reaction-to-assemble-phenanthridines-from-n-arylacrylamide-using-cyano-as-a-bridge-under-photoredox-catalysis
#5
Yulan Yu, Zhiqiang Cai, Weiwen Yuan, Ping Liu, Peipei Sun
A radical addition/nitrile insertion/HAS cascade reaction to prepare 6-quaternary alkylated phenanthridines was developed. The addition of the active methylene radicals which generated from 2-bromoacetonitrile, ethyl 2-bromoacetate, 2-bromo-N,N-dimethylacetamide or 2-bromo-1-phenylethan-1-one to carbon-carbon double bonds of N-arylacrylamides followed by the cyano-participated sequential cyclization produced a serial of phenanthridines in moderate to good yields under photoredox catalysis.
July 19, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28720807/fast-atom-transport-and-launching-in-a-nonrigid-trap
#6
A Tobalina, M Palmero, S Martínez-Garaot, J G Muga
We study the shuttling of an atom in a trap with controllable position and frequency. Using invariant-based inverse engineering, protocols in which the trap is simultaneously displaced and expanded are proposed to speed up transport between stationary trap locations as well as launching processes with narrow final-velocity distributions. Depending on the physical constraints imposed, either simultaneous or sequential approaches may be faster. We consider first a perfectly harmonic trap, and then extend the treatment to generic traps...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28719656/phenotypic-characterization-of-circulating-tumor-cells-in-the-peripheral-blood-of-patients-with-small-cell-lung-cancer
#7
Ippokratis Messaritakis, Eleni Politaki, Athanasios Kotsakis, Eleftheria-Kleio Dermitzaki, Filippos Koinis, Eleni Lagoudaki, Anastasios Koutsopoulos, Galatea Kallergi, John Souglakos, Vassilis Georgoulias
BACKGROUND: To evaluate the phenotypic heterogeneity of circulating tumor cells (CTCs) based on the expression of proliferative, apoptotic and Epithelial-to-Mesenchymal Transmission (EMT) markers during front-line treatment in patients with small cell lung cancer (SCLC) and to evaluate their clinical relevance. METHODS: CTCs from 108 chemotherapy-naïve patients with SCLC were analyzed by double immunofluorescence staining using anti-Ki67, anti-M30, anti-Vimentin along with anti-CKs antibodies...
2017: PloS One
https://www.readbyqxmd.com/read/28713516/sequential-compression-pump-effect-on-hypotension-due-to-spinal-anesthesia-for-cesarean-section-a-double-blind-clinical-trial
#8
Fatemeh Javaherforoosh Zadeh, Mostafa Alqozat, Reza Akhond Zadeh
BACKGROUND: Spinal anesthesia (SA) is a standard technique for cesarean section. Hypotension presents an incident of 80-85% after SA in pregnant women. OBJECTIVE: To determine the effect of intermittent pneumatic compression of lower limbs on declining spinal anesthesia induced hypotension during cesarean section. METHODS: This double-blind clinical prospective study was conducted on 76 non-laboring parturient patients, aged 18-45 years, with the American Society of Anesthesiologist physical status I or II who were scheduled for elective cesarean section at Razi Hospital, Ahvaz, Iran from December 21, 2015 to January 20, 2016...
May 2017: Electronic Physician
https://www.readbyqxmd.com/read/28712500/use-of-zinc-finger-nucleases-for-crop-improvement
#9
John P Davies, Sandeep Kumar, Lakshmi Sastry-Dent
Over the past two decades, new technologies enabling targeted modification of plant genomes have been developed. Among these are zinc-finger nucleases (ZFNs) which are composed of engineered zinc-finger DNA-binding domains fused with a nuclease, generally the FokI nuclease. The zinc-finger domains are composed of a series of four to six 30 amino acid domains that can bind to trinucleotide sequences giving the entire DNA-binding domain specificity to 12-18 nucleotides. Since the FokI nuclease functions as a dimer, pairs of zinc-finger domains are designed to bind upstream and downstream of the cut site which increases the specificity of the complete ZFN to 24-36 nucleotides...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28708962/open-label-phase-i-clinical-trial-of-ad5-ebov-in-africans-in-china
#10
Lihua Wu, Zhe Zhang, Hainv Gao, Yuhua Li, Lihua Hou, Hangping Yao, Shipo Wu, Jian Liu, Ling Wang, You Zhai, Huilin Ou, Meihua Lin, Xiaoxin Wu, Jingjing Liu, Guanjing Lang, Qian Xin, Guolan Wu, Li Luo, Pei Liu, Jianzhong Shentu, Nanping Wu, Jifang Sheng, Yunqing Qiu, Wei Chen, Lanjuan Li
BACKGROUND: To determine the safety and immunogenicity of a novel recombinant adenovirus type 5 vector based Ebola virus disease vaccine (Ad5-EBOV) in Africans in China. METHODS: A phase 1, dose-escalation, open-label trial was conducted. 61 healthy Africans were sequentially enrolled, with 31 participants receiving one shot intramuscular injection and 30 participants receiving a double-shot regimen. Primary and secondary end points related to safety and immunogenicity were assessed within 28 days after vaccination...
July 14, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28696258/effects-of-dna-end-configuration-on-xrcc4-dna-ligase-iv-and-its-stimulation-of-artemis-activity
#11
Christina A Gerodimos, Howard H Y Chang, Go Watanabe, Michael R Lieber
In humans, nonhomologous DNA end-joining (NHEJ) is the major pathway by which DNA double-strand breaks are repaired. Recognition of each broken DNA end by the DNA repair protein Ku is the first step in NHEJ, followed by the iterative binding of nucleases, DNA polymerases, and the XRCC4:DNA ligase IV (X4:LIV) complex in an order influenced by the configuration of the two DNA ends at the break site. The endonuclease Artemis improves joining efficiency by functioning in a complex with DNA-dependent protein kinase, catalytic subunit (DNA-PKcs) that carries out endonucleolytic cleavage of 5' and 3' overhangs...
July 10, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28692096/a-quantum-rovibrational-state-selected-study-of-the-proton-transfer-reaction-h2-x-2-%C3%AE-v-1-3-n-0-3-ne-%C3%A2-neh-h-using-the-pulsed-field-ionization-photoion-method-observation-of-the-rotational-effect-near-the-reaction-threshold
#12
Bo Xiong, Yih-Chung Chang, Cheuk-Yiu Ng
Using the sequential electric field pulsing scheme for vacuum ultraviolet (VUV) laser pulsed field ionization-photoion (PFI-PI) detection, we have successfully prepared H2(+)(X(2)Σ: v(+) = 1-3; N(+) = 0-5) ions in the form of an ion beam in single quantum-rovibrational-states with high purity, high intensity, and narrow laboratory kinetic energy spread (ΔElab ≈ 0.05 eV). This VUV-PFI-PI ion source, when coupled with the double-quadrupole double-octupole ion-molecule reaction apparatus, has made possible a systematic examination of the vibrational- as well as rotational-state effects on the proton transfer reaction of H2(+)(X(2)Σ: v(+); N(+)) + Ne...
July 10, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28687625/a-phase-ii-trial-evaluating-the-safety-of-rapid-infusion-of-ofatumumab-in-patients-with-previously-treated-chronic-lymphocytic-leukemia
#13
William Donnellan, Jesus G Berdeja, Diana Shipley, Edward R Arrowsmith, David Wright, Scott Lunin, Richard Brown, James H Essell, Ian W Flinn
LESSONS LEARNED: Ofatumumab infusion reactions can be diminished by escalating the dose rate in individual patients in sequential infusions. BACKGROUND: Ofatumumab (OFA) is a fully humanized, anti-CD20 antibody approved for use in chronic lymphocytic leukemia (CLL). The recommended administration requires long infusion times. We evaluated an accelerated infusion regimen of 2 hours. METHODS: The first dose of OFA (300 mg) was given on week 1 day 1 starting at 3...
July 7, 2017: Oncologist
https://www.readbyqxmd.com/read/28687387/hybrid-hydrogels-with-high-strength-and-biocompatibility-for-bone-regeneration
#14
Yongjiang Zheng, Keqing Huang, Xinru You, Bingxue Huang, Jun Wu, Zhipeng Gu
The development of hydrogels for bone regeneration has highlighted the challenge that load-bearing hydrogels need to be biocompatible while achieving high strength. Several approaches have been reported to improve the toughness of hydrogels, but achieving high toughness and biocompatibility simultaneously remains a challenge. Here we report a polyacrylic acid/alginate/demineralized bone matrix (PAA/Alg/DBM) hybrid double network hydrogel, which was synthesized by a two-step sequential polymerization with embedded DBM, possessing both high strength and biocompatibility...
July 4, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28685784/%C3%AE-pyridylenolate-zinc-catalysts-for-the-ring-opening-homo-and-copolymerization-of-%C3%AE%C2%B5-caprolactone-and-lactides
#15
Jianliang Bai, Xia Xiao, Yue Zhang, Jianbin Chao, Xia Chen
A family of zinc β-pyridylenolates with varying α,β-substituents has been synthesized. A direct reaction of β-pyridyl ketone ligands with ZnEt2 in toluene afforded dimeric [LZnEt]2 (L = (2-C5H4N)-C(R(1))[double bond, length as m-dash]C(R(2))-O-). X-ray structural data revealed that all the [LZnEt]2 complexes exist as μ-O-bridged dimers in the solid state, although they adopt a different geometry. Each of the [LZnEt]2 complexes is a highly active catalyst for the ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) and racemic lactide (rac-LA), respectively...
July 7, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28677877/a-phase-2a-dose-escalation-study-of-the-safety-tolerability-pharmacokinetics-and-haemodynamic-effects-of-bms-986231-in-hospitalized-patients-with-heart-failure-with-reduced-ejection-fraction
#16
Cristina Tita, Edward M Gilbert, Adrian B Van Bakel, Jacek Grzybowski, Garrie J Haas, Mohammad Jarrah, Stephanie H Dunlap, Stephen S Gottlieb, Marc Klapholz, Parag C Patel, Roman Pfister, Tim Seidler, Keyur B Shah, Tomasz Zieliński, Robert P Venuti, Douglas Cowart, Shi Yin Foo, Alexander Vishnevsky, Veselin Mitrovic
AIMS: This study was designed to evaluate the safety, tolerability and haemodynamic effects of BMS-986231, a novel second-generation nitroxyl donor with potential inotropic, lusitropic and vasodilatory effects in patients hospitalized with decompensated heart failure and reduced ejection fraction (HFrEF). METHODS AND RESULTS: Forty-six patients hospitalized with decompensated HFrEF were enrolled into four sequential dose-escalation cohorts in this double-blind, randomized, placebo-controlled Phase 2a study...
July 5, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28669634/structure-of-phytoene-desaturase-provides-insights-into-herbicide-binding-and-reaction-mechanisms-involved-in-carotene-desaturation
#17
Anton Brausemann, Sandra Gemmecker, Julian Koschmieder, Sandro Ghisla, Peter Beyer, Oliver Einsle
Cyanobacteria and plants synthesize carotenoids via a poly-cis pathway starting with phytoene, a membrane-bound C40 hydrocarbon. Phytoene desaturase (PDS) introduces two double bonds and concomitantly isomerizes two neighboring double bonds from trans to cis. PDS assembles into homo-tetramers that interact monotopically with membranes. A long hydrophobic tunnel is proposed to function in the sequential binding of phytoene and the electron acceptor plastoquinone. The herbicidal inhibitor norflurazon binds at a plastoquinone site thereby blocking reoxidation of FADred...
June 21, 2017: Structure
https://www.readbyqxmd.com/read/28665371/-results-of-a-randomized-double-blind-multicenter-placebo-controlled-in-parallel-groups-trial-of-the-efficacy-and-safety-of-prolonged-sequential-therapy-with-mexidol-in-the-acute-and-early-recovery-stages-of-hemispheric-ischemic-stroke-epica
#18
L V Stakhovskaya, N A Shamalov, D R Khasanova, E V Melnikova, A S Agafiina, K V Golikov, E I Bogdanov, A A Yakupova, L V Roshkovskaya, L V Lukinykh, T M Lokshtanova, I E Poverennova, L A Shepankevich
AIM: To evaluate the efficacy and safety of prolonged sequential therapy with mexidol in the acute and early recovery stages of hemispheric ischemic stroke (IS). MATERIAL AND METHODS: A randomized double blind multicenter placebo-controlled, in parallel groups trial included 151 patients (62 men and 89 women) with hemispheric IS. Using a method of simple randomization, 150 patients (62 men and 88 women), aged 40-79 years, were randomized into two groups. Patients of Group I were treated with mexidol: 500 mg/day IV infusion for 10 days, followed by 125 mg tid (375 mg/day) PO for 8 weeks...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28662936/angiotensin-receptor-neprilysin-inhibition%C3%A2-in-heart-failure-with-preserved%C3%A2-ejection-fraction-rationale-and-design-of-the-paragon-hf-trial
#19
REVIEW
Scott D Solomon, Adel R Rizkala, Jianjian Gong, Wenyan Wang, Inder S Anand, Junbo Ge, Carolyn S P Lam, Aldo P Maggioni, Felipe Martinez, Milton Packer, Marc A Pfeffer, Burkert Pieske, Margaret M Redfield, Jean L Rouleau, Dirk J Van Veldhuisen, Faiez Zannad, Michael R Zile, Akshay S Desai, Victor C Shi, Martin P Lefkowitz, John J V McMurray
OBJECTIVES: The PARAGON-HF (Prospective Comparison of ARNI with ARB Global Outcomes in HF With Preserved Ejection Fraction) trial is designed to determine the efficacy and safety of the angiotensin receptor neprilysin inhibitor sacubitril/valsartan compared with valsartan in patients with chronic heart failure and preserved ejection fraction (HFpEF). BACKGROUND: HFpEF is highly prevalent, associated with substantial morbidity and mortality, and in need of effective therapies that improve outcomes...
July 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28662283/treatment-of-a-patient-with-hiv-and-metastatic-melanoma-with-consecutive-ipilimumab-and-nivolumab
#20
D Tomsitz, R Hein, T Biedermann, J Kohlmeyer
Recently new therapeutic agents were developed leading to a paradigm shift in melanoma treatment by the approval of checkpoint inhibitors and targeted therapies. However, in clinical trials HIV-infected melanoma patients have been excluded due to their condition and no randomized double-blind placebo-controlled studies have been published to evaluate the efficacy of these therapies in melanoma patients with concomitant HIV infection. We report on a HIV-positive melanoma patient treated sequentially with ipilimumab and nivolumab whose CD4 count and virus replication have been monitored closely...
June 29, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
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