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https://www.readbyqxmd.com/read/28441544/enrichment-of-resolving-power-improves-ion-peak-quantification-on-a-lipidomics-platform
#1
Kosuke Saito, Yasuo Ohno, Yoshiro Saito
In this study, we delineated the importance of MS resolving power on the ion-peak quantification of lipids using an Orbitrap Fusion instrument and established a liquid chromatography-based, high-performance lipidomics platform. The ion-peak recognition of several lipids in human plasma, such as LPC(15:0), LPE(22:5), and PC(35:0), was clearly improved by increasing the MS resolving power. In addition, we evaluated the impact of resolving power on the quantitative detection of lipids by automatic ion-peak recognition with calculation of the coefficient of variance (CV)...
April 13, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28441504/paradoxical-long-timespan-opening-of-the-hole-in-self-supported-water-films-of-nanometrical-thickness
#2
Zahava Barkay, Edward Bormashenko
Opening of holes in self-supported thin (nano-scaled) water films has been in situ investigated with the environmental scanning electron microscope. Opening of a hole occurs within a two-stage process. At the first stage the rim surrounding a hole is formed, resembling the process which is observed under puncturing of soap bubbles. At the second stage the exponential growth of the hole is observed, with a characteristic time of a dozen of seconds. We explain the exponential kinetics of holes' growth by the balance between inertia (gravity) and viscous dissipation...
April 25, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28441482/the-value-of-nmr-parameters-and-dft-calculations-for-quantum-information-processing-utilizing-phosphorus-heterocycles
#3
Jessica Boreli Dos Reis Lino, Eduardo P Rocha, Teodorico Castro Ramalho
Quantum computing is the field of science that uses quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data. The fundamental information unit used in quantum computing is the quantum bit or qubit. It is well-known that quantum computers could theoretically be able to solve problems much more quickly than any classical computers. Currently, the first and still the most successful implementations of quantum information processing (QIP) have been based on nuclear spins in liquids...
April 25, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28441392/radiation-effects-on-the-mixed-convection-flow-induced-by-an-inclined-stretching-cylinder-with-non-uniform-heat-source-sink
#4
Tasawar Hayat, Sajid Qayyum, Ahmed Alsaedi, Saleem Asghar
This study investigates the mixed convection flow of Jeffrey liquid by an impermeable inclined stretching cylinder. Thermal radiation and non-uniform heat source/sink are considered. The convective boundary conditions at surface are imposed. Nonlinear expressions of momentum, energy and concentration are transformed into dimensionless systems. Convergent homotopic solutions of the governing systems are worked out by employing homotopic procedure. Impact of physical variables on the velocity, temperature and concentration distributions are sketched and discussed...
2017: PloS One
https://www.readbyqxmd.com/read/28441352/high-throughput-determination-of-sodium-danshensu-in-beagle-dogs-by-the-lcms-ms-method-employing-liquid-liquid-extraction-based-on-96-well-format-plates
#5
Jingjing Jiang, Xin Zhao, Xiuxiu Li, Shengyuan Wu, Shidan Yu, Yuefen Lou, Guorong Fan
Sodium Danshensu (sodium d-(+)-β-(3,4-dihydroxyphenyl) lactate), one of the water-soluble ingredients in Salvia miltiorrhiza, exhibits potent relaxation of the coronary artery and anticoagulation effection. A high-throughput, rapid, and sensitive method combining liquid chromatography with electrospray ionization tandem mass spectrometry to determine the sodium danshensu in beagle dog plasma was developed and validated, using gallic acid as an internal standard (IS). Acidified plasma samples were extracted using 96-well liquid-liquid extraction, and were eluted on a CNW Athena C18 column (3 μm, 2...
April 25, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28441311/feasibility-and-outcome-of-an-accelerated-recovery-protocol-in-asian-adolescent-idiopathic-scoliosis-patients
#6
Chris Yin Wei Chan, Shweh Fern Loo, Jun Yin Ong, Kulathunga Arachchige Lisitha, M Shahnaz Hasan, Chee Kean Lee, Chee Kidd Chiu, Mun Keong Kwan
STUDY DESIGN: Prospective cohort study OBJECTIVE.: To determine the feasibility of an accelerated recovery protocol for Asian Adolescent Idiopathic Scoliosis (AIS) patients undergoing posterior spinal fusion (PSF). SUMMARY OF BACKGROUND DATA: There has been successful implementation of an accelerated recovery protocol for AIS patients undergoing PSF in the western population. No similar studies have been reported in the Asian population. METHODS: 74 AIS (65F, 9 M) patients scheduled for PSF surgery were recruited...
April 24, 2017: Spine
https://www.readbyqxmd.com/read/28441181/inhaled-treprostinil-drug-delivery-during-mechanical-ventilation-and-spontaneous-breathing-using-two-different-nebulizers
#7
Donna K Parker, Shuijie Shen, Jiang Zheng, D Dunbar Ivy, Dave N Crotwell, Justin C Hotz, Robert M DiBlasi
OBJECTIVES: To determine the feasibility of delivering inhaled treprostinil during mechanical ventilation and spontaneous unassisted ventilation using the Tyvaso Inhalation System and the vibrating mesh nebulizer. We sought to compare differences in fine particle fraction, and absolute inhaled treprostinil mass delivered to neonatal, pediatric, and adult models affixed with a face mask, conventional, and high-frequency ventilation between Tyvaso Inhalation System and with different nebulizer locations between Tyvaso Inhalation System and vibrating mesh nebulizer...
April 22, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28441152/cryoablation-in-the-management-of-barrett-s-esophagus
#8
Anouk Overwater, Bas L A M Weusten
PURPOSE OF REVIEW: Providing an overview on types of cryotherapy for esophageal application and their role in the management of Barrett's esophagus. RECENT FINDINGS: Recent studies have involved multiple types of cryotherapy including cryospray techniques that use either liquid nitrogen or carbon dioxide as the cryogenic fluid, and the CryoBalloon focal ablation device that uses nitrous oxide. Overall, studies report cryotherapy to be safe and effective in eradicating Barrett's epithelium...
April 24, 2017: Current Opinion in Gastroenterology
https://www.readbyqxmd.com/read/28441010/a-new-instrumental-set-up-for-simultaneous-total-and-speciation-analysis-of-volatile-metal-loid-s-in-gas-and-liquefied-gas-samples
#9
Laura Freije-Carrelo, Mariella Moldovan, Jose Ignacio Garcia-Alonso, Thuy Diep Thanh Vo, Jorge Ruiz Encinar
Although analysis of metals and metalloids, such as arsenic, is widely spread in many different fields, their analysis in gas and liquefied gas samples is still a challenge. A new GC-ICP-MS set up has been developed for their simultaneous total and speciation analysis in gas and liquefied gas samples without the need of a preconcentration step. An arsine in nitrogen standard was used for optimization and evaluation of the system. Good linearity and detection limits in the very low ppt level for both total and speciation analyses were found...
April 25, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28441007/rough-structure-of-electrodeposition-as-a-template-for-an-ultra-robust-self-cleaning-surface
#10
Yongquan Qing, Chuanbo Hu, Chuanning Yang, Kai An, Fawei Tang, Junyan Tan, Changsheng Liu
Superhydrophobic surfaces with self-cleaning properties have developed, based on roughness on the micro/nanometer scales and low-energy surfaces. However, such surfaces are fragile and stop functioning when exposed to oil. Addressing these challenges, here we show an ultra-robust self-cleaning surface fabricated by a process of metal electrodeposition of a rough structure that is subsequently coated with a fluorinated metal-oxide nanoparticles. Scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy and X-ray diffraction were employed to characterize the surfaces...
April 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28440893/an-hplc-method-for-simultaneous-quantitative-determination-of-seven-secoiridoid-glucosides-separated-from-the-roots-of-ilex-pubescens
#11
Yang Zhang, Huan Xiong, Jiayi Bi, Guiyun Zhao, Yi Yang, Xue Chen, Yuncong Li, Chongyu Zhang, Guogang Zhang
A simple and specific high-performance liquid chromatographic method has been developed and validated to simultaneously determine seven secoiridoid glucosides for the first time. And three of them were separated from the ethanolic extract of the roots of Ilex pubescens for the first time, namely nuezhenide A, ligusides B and oleonuezhenide. In quantitative analysis, all of the calibration curves showed good linear regression (r > 0.999) within the tested ranges, and the mean recoveries of three different concentrations ranged from 97...
April 25, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28440728/characterization-of-chemical-contaminants-generated-by-a-desktop-fused-deposition-modeling-3-dimensional-printer
#12
Aleksandr B Stefaniak, Ryan F LeBouf, Jinghai Yi, Jason Ham, Timothy Nurkewicz, Diane E Schwegler-Berry, Bean T Chen, J Raymond Wells, Matthew G Duling, Robert B Lawrence, Stephen B Martin, Alyson R Johnson, M Abbas Virji
Printing devices are known to emit chemicals into the indoor atmosphere. Understanding factors that influence release of chemical contaminants from printers is necessary to develop effective exposure assessment and control strategies. In this study, a desktop fused deposition modeling (FDM) 3-D printer using acrylonitrile butadiene styrene (ABS) or polylactic acid (PLA) filaments and two monochrome laser printers were evaluated in a 0.5 m(3) chamber. During printing, chamber air was monitored for vapors using a real-time photoionization detector (results expressed as isobutylene equivalents) to measure total volatile organic compound (TVOC) concentrations, evacuated canisters to identify specific VOCs by off-line gas chromatography-mass spectrometry (GC-MS) analysis, and liquid bubblers to identify carbonyl compounds by GC-MS...
April 25, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28440650/comprehensive-computational-and-experimental-analysis-of-biomaterial-towards-the-behavior-of-imidazolium-based-ionic-liquids-an-interplay-between-hydrophilic-and-hydrophobic-interactions
#13
Reddicherla Umapathi, Suresh B Vepuri, Pannuru Venkatesu, Mahmoud E S Soliman
To provide insights into the aggregation behavior, hydration tendency and variation in phase transition temperature produced by the addition of ionic liquids (ILs) to poly(N-isopropylacrylamide) (PNIPAM) aqueous solution, systematic physicochemical studies, and molecular dynamic simulations were carried out. The influence of ILs possessing same [Cl]- anion and a set of cation [Cnmim]+ with increasing alkyl chain length such as 1-ethyl-3-methylimidazolium ([Emim]+), 1-allyl-3-methylimidazolium ([Amim]+), 1-butyl-3-methylimidazolium ([Bmim]+), 1-hexyl-3-methylimidazolium ([Hmim]+), 1-benzyl-3-methylimidazolium ([Bzmim]+), and 1- decyl-3-methylimidazolium ([Dmim] +) on the phase transition of PNIPAM was monitored by the aid of UV-visible absorption spectra, fluorescence intensity spectra, viscosity (ɳ), dynamic light scattering (DLS) and Fourier transform infrared (FTIR) spectroscopy...
April 25, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28440638/dielectric-relaxation-of-the-ionic-liquid-1-ethyl-3-methylimidazolium-ethylsulfate-microwave-and-far-ir-properties
#14
Nilesh Ramchandra Dhumal, Johannes Kiefer, David Andrew Turton, Klaas Wynne, Hyung J Kim
Dielectric relaxation of the ionic liquid, 1-ethyl-3-methylimidazolium ethylsulfate (EMI(+)ETS(-)), is studied using molecular dynamics (MD) simulations. The collective dynamics of polarization arising from cations and anions are examined. Character- istics of the rovibrational and translational components of polarization dynamics are analyzed to understand their respective roles in the microwave and terahertz regions of dielectric relaxation. The MD results are compared with the experimental low- frequency spectrum of EMI(+)ETS(-), obtained via ultrafast optical Kerr effect (OKE) measurements...
April 25, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28440623/biomimetic-superhydrophobic-bio-based-polyurethane-coated-fertilizer-with-atmosphere-outerwear
#15
Jiazhuo Xie, Yuechao Yang, Bin Gao, Yongshan Wan, Yuncong C Li, Jing Xu, Qinghua Zhao
The development of efficient bio-based controlled-release fertilizers has captured much research attention because of the environmental concerns and food scarcity problems. In this work, a biomimetic superhydrophobic bio-based polyurethane-coated fertilizer (SBPF) was successfully fabricated by increasing surface roughness and reducing surface energy of polyurethane (PU) coating. The green PU coating was synthesized from low-cost, biodegradable, and renewable cottonseed oil. The nutrient release longevity of SBPF revealed 2-fold enhancement compared with the normal bio-based PU-coated fertilizer (BPF)...
April 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28440567/dawson-type-polyoxomolybdate-anions-p2mo18o626-captured-by-ionic-liquid-on-graphene-oxide-as-high-capacity-anode-material-for-lithium-ion-batteries
#16
Yu-Fei Song, Jun Hu, Hongling Diao, Wenjing Luo
The development of advanced anode materials is of significance for the next generation of lithium ion batteries (LIBs). Herein, the imidazolium-based ionic liquids (ILs) was covalently grafted on the surface of graphene oxides (GO) via the carboxyl-amino bond,providing a loading hotbed for the Dawson-type POM of (NH4)6P2Mo18O62 (denoted as P2Mo18). The as-prepared GO-IL-P2Mo18 nanocomposite was characterized by FT-IR, Raman, TGA, SEM, TEM and XPS. When the nanocomposite was used as the anode material for lithium ion batteries (LIBs), it showed a high reversible capacity of 903...
April 25, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28440522/-nutrition-management-in-obese-patients-with-type-2-diabetes-mellitus-after-laparoscopic-sleeve-gastrectomy
#17
Weihong Tang, Yuhua Chen, Meizhen Pan, Lihua Chen, Lele Zhang, Tingfeng Wang, Xiong Zhang, Peng Zhang, Chengzhu Zheng, Bo Yu
OBJECTIVE: To explore the value of nutrition management in obese patients with type 2 diabetes mellitus(T2DM) after laparoscopic sleeve gastrectomy(LSG). METHODS: Clinical data of 22 obese T2DM patients undergoing LSG from March 2013 to July 2015 in Fudan University Pudong Medical Center were collected. All the patients strictly followed the specialized instruction by nutritionists: diabetic and low calorie diet 3347.2 to 5020.8 kJ (800 to 1200 kcal) per day before the operation; low calorie liquid diet 2510...
April 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28440421/allicin-induces-the-upregulation-of-abca1-expression-via-ppar%C3%AE-lxr%C3%AE-signaling-in-thp-1-macrophage-derived-foam-cells
#18
Xiao-Long Lin, Hui-Jun Hu, Yuan-Bo Liu, Xue-Mei Hu, Xiao-Juan Fan, Wei-Wen Zou, Yong-Quan Pan, Wen-Quan Zhou, Min-Wen Peng, Cai-Hong Gu
Allicin is considered anti-atherosclerotic due to its antioxidant and anti-inflammatory effects, which makes it an important drug for the prevention and treatment of atherosclerosis. However, the effects of allicin on foam cells are unclear. Thus, in this study, we examined the effects of allicin on lipid accumulation via peroxisome proliferator-activated receptor γ (PPARγ)/liver X receptor α (LXRα) in THP‑1 macrophage-derived foam cells. THP‑1 cells were exposed to 100 nM phorbol myristate acetate (PMA) for 24 h, and then to oxydized low-density lipoprotein (ox-LDL; 50 mg/ml) to induce foam cell formation...
April 11, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28440419/different-effects-of-%C3%A2-borneol-and-%C3%A2-%C3%A2-borneol-on-the-pharmacokinetics-of-osthole-in-rats-following-oral-administration
#19
Dan-Dan Luo, Xiao-Ying Chen, Zhen-Biao Zhang, Chao-Yue Sun, Yi-Feng Zheng, Yu-Hong Liu, Xiu-Fen Wang, Qi Wang, Janis Ya-Xian Zhan, Zi-Ren Su
Osthole is the primary active component of a number of herbal plants such as the Cnidium monnieri fruit. In traditional Chinese herb medicine, osthole is commonly used in combination with borneol to obtain improved pharmacological effects. The aim of the present study was to investigate the effect of borneol enantiomers on the pharmacokinetics of osthole. An appropriate high‑performance liquid chromatography (HPLC) method was applied to determine the concentrations of osthole in plasma. Following oral administration of osthole alone or combined with borneol in rats, blood samples were collected and analyzed by HPLC...
April 21, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28440407/effects-of-cytochrome-p450-family-3-subfamily-a-member%C3%A2-5-gene-polymorphisms-on-daunorubicin-metabolism-and-adverse-reactions-in-patients-with-acute-leukemia
#20
Zhen Huang, Juxiang Wang, Jiangchao Qian, Yuan Li, Zhisheng Xu, Min Chen, Hongfei Tong
The present study aimed to investigate the association between the genetic polymorphism of cytochrome P450 family 3 subfamily A member 5 (CYP3A5) and the activity of CYP3A and plasma concentrations of daunorubicin (DNR) in patients with acute leukemia. A total of 36 children with newly diagnosed acute lymphoblastic leukemia were enrolled in the study. Polymerase chain reaction (PCR)‑restriction fragment length polymorphism and PCR product sequencing were used to detect the genotype of CYP3A5*3. PCR was then used to express the mRNA expression of CYP3A5...
April 12, 2017: Molecular Medicine Reports
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