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https://www.readbyqxmd.com/read/30059617/exploration-of-dextran-for-application-as-corrosion-inhibitor-for-steel-in-strong-acid-environment-effect-of-molecular-weight-modification-and-temperature-on-efficiency
#1
Moses M Solomon, Saviour A Umoren, Ime B Obot, Ahmad A Sorour, Husnu Gerengi
The possibility of utilizing dextran as a green corrosion inhibitor for steel in strong acid environment was explore using weight loss, electrochemical (electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (EFM), potentiodynamic polarization (PDP), and linear polarization (LPR)) supported with surface analysis via scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDAX), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS) techniques...
August 13, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30029346/operating-cost-reduction-of-uf-membrane-filtration-process-for-drinking-water-treatment-attributed-to-chemical-cleaning-optimization
#2
Sung Soo Yoo, Kyoung Hoon Chu, Il-Hwan Choi, Ji Sung Mang, Kwang Baik Ko
This study investigated the cost and CO2 emission reduced as a result of optimizing operating conditions for chemical cleaning in a membrane filtration process used for water treatment. A new protocol was proposed and operating conditions for chemical cleaning of a pilot-scale membrane filtration process were optimized. The critical flux for irreversibility was identified as the permeate flux using a modified flux-step method, and was 100 l m-2  h-1 , 20 l m-2  h-1 higher than the vendor recommended permeate flux...
January 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29990308/towards-nanoscale-electrical-measurements-in-liquid-by-advanced-kpfm-techniques-a-review
#3
Liam Collins, Jason I Kilpatrick, Sergei V Kalinin, Brian J Rodriguez
Fundamental mechanisms of energy storage, corrosion, sensing, and multiple biological functionalities are directly coupled to electrical processes and ionic dynamics at solid-liquid interfaces. In many cases, these processes are spatially inhomogeneous taking place at grain boundaries, step edges, point defects, ion channels, etc and possess complex time and voltage dependent dynamics. This necessitates time-resolved and real-space probing of these phenomena. In this review, we discuss the applications of force-sensitive voltage modulated scanning probe microscopy (SPM) for probing electrical phenomena at solid-liquid interfaces...
August 2018: Reports on Progress in Physics
https://www.readbyqxmd.com/read/29878572/electronic-fetal-monitoring-is-more-important-than-freedom-of-maternal-position-in-labour-for-position-in-labour-is-important-but-efm-can-be-vital
#4
Philip J Steer
No abstract text is available yet for this article.
June 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29875660/-fructus-mume-extracts-alleviate-diarrhea-in-breast-cancer-patients-receiving-the-combination-therapy-of-lapatinib-and-capecitabine
#5
Hua Xing, Lirong Zhang, Jinshu Ma, Zhen Liu, Changlong Song, Yuxia Liu
Lapatinib and capecitabine have been widely used in the therapy of breast cancer. However, long-term use of lapatinib and capecitabine often causes the most common side effect diarrhea, which limit the medicine use. Fructus mume (F. mume) has been proved to be effective to treat chronic diarrhea with few side effects. The compounds from F. mume were extracted by using an ethanol method. Extracts of F. mume (EFM) were analyzed by HPLC. We investigated the protective effects of EFM on the diarrhea caused by lapatinib and capecitabine...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29873636/nanoscale-charge-transfer-and-diffusion-at-the-mos-2-sio-2-interface-by-atomic-force-microscopy-contact-injection-versus-triboelectrification
#6
Rui Xu, Shili Ye, Kunqi Xu, Le Lei, Sabir Hussain, Zhiyue Zheng, Fei Pang, Shuya Xing, Xinmeng Liu, Wei Ji, Zhihai Cheng
Understanding the process of charge generation, transfer, and diffusion between two-dimensional (2D) materials and their supporting substrates is very important for potential applications of 2D materials. Compared with the systematic studies of triboelectric charging in a bulk sample, a fundamental understanding of the triboelectrification of the 2D material/insulator system is rather limited. Here, the charge transfer and diffusion of both the SiO2 surface and MoS2 /SiO2 interface through contact electrification and frictional electrification are investigated systematically in situ by scanning Kelvin probe microscopy and dual-harmonic electrostatic force microscopy...
August 31, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29797442/stomach-herniation-prior-to-nonreassuring-fetal-status-in-a-case-of-fetal-gastroschisis
#7
Yuki Kojima, Katsusuke Ozawa, Rika Sugibayashi, Seiji Wada, Haruhiko Sago
The neonatal prognosis in gastroschisis is generally good; however, intrauterine fetal death (IUFD) and nonreassuring fetal status (NRFS) sometimes occur in fetal cases of gastroschisis. Previously, we reported stomach herniation as a possible risk factor for IUFD or NRFS in fetuses with gastroschisis. We report a case of fetal gastroschisis showing stomach herniation and increased velocity of the umbilical venous (UV) flow the day before NRFS by electronic fetal monitoring (EFM). A 27-year-old pregnant woman was followed up from 16 weeks' gestation due to fetal gastroschisis...
July 2018: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/29743275/thermodynamic-constraints-for-identifying-elementary-flux-modes
#8
REVIEW
Sabine Peres, Stefan Schuster, Philippe Dague
Metabolic pathway analysis is a key method to study metabolism and the elementary flux modes (EFMs) is one major concept allowing one to analyze the network in terms of minimal pathways. Their practical use has been hampered by the combinatorial explosion of their number in large systems. The EFMs give the possible pathways at steady state, but the real pathways are limited by biological constraints. In this review, we display three different methods that integrate thermodynamic constraints in terms of Gibbs free energy in the EFMs computation...
June 19, 2018: Biochemical Society Transactions
https://www.readbyqxmd.com/read/29720111/cancer-derived-exosomes-from-her2-positive-cancer-cells-carry-trastuzumab-emtansine-into-cancer-cells-leading-to-growth-inhibition-and-caspase-activation
#9
Mark Barok, Maija Puhka, Gyorgy Vereb, Janos Szollosi, Jorma Isola, Heikki Joensuu
BACKGROUND: Trastuzumab emtansine (T-DM1) is an antibody-drug conjugate that carries a cytotoxic drug (DM1) to HER2-positive cancer. The target of T-DM1 (HER2) is present also on cancer-derived exosomes. We hypothesized that exosome-bound T-DM1 may contribute to the activity of T-DM1. METHODS: Exosomes were isolated from the cell culture medium of HER2-positive SKBR-3 and EFM-192A breast cancer cells, HER2-positive SNU-216 gastric cancer cells, and HER2-negative MCF-7 breast cancer cells by serial centrifugations including two ultracentrifugations, and treated with T-DM1...
May 2, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29719765/electrostatic-force-spectroscopy-revealing-the-degree-of-reduction-of-individual-graphene-oxide-sheets
#10
Yue Shen, Ying Wang, Yuan Zhou, Chunxi Hai, Jun Hu, Yi Zhang
Electrostatic force spectroscopy (EFS) is a method for monitoring the electrostatic force microscopy (EFM) phase with high resolution as a function of the electrical direct current bias applied either to the probe or sample. Based on the dielectric constant difference of graphene oxide (GO) sheets (reduced using various methods), EFS can be used to characterize the degree of reduction of uniformly reduced one-atom-thick GO sheets at the nanoscale. In this paper, using thermally or chemically reduced individual GO sheets on mica substrates as examples, we characterize their degree of reduction at the nanoscale using EFS...
2018: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/29621921/temporal-and-quantitative-associations-of-electronic-fetal-heart-rate-monitoring-patterns-and-neonatal-outcomes-%C3%A2
#11
Dotun Ogunyemi, Andrew Jovanovski, Perry Friedman, Brittany Sweatman, Ichchha Madan
OBJECTIVE: The objective of this study is to evaluate the associations of electronic fetal heart rate monitoring (EFM) patterns and adverse neonatal outcomes Study design: From 2013 to 2016; 12,067 term, singleton deliveries in labor ≥2 h with abnormal EFM defined as absent accelerations, variable, late or prolonged decelerations, tachycardia, bradycardia, or minimal variability were analyzed as any documentation during labor, in first hour and last hour of labor. Outcomes were composite neonatal adverse outcomes, neonatal intensive care unit (NICU) admission, neonatal hypoxia, neonatal hypoglycemia, umbilical artery pH, and base excess...
April 6, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29577914/the-importance-of-the-learning-process-in-st-analysis-interpretation-and-its-impact-in-improving-clinical-and-neonatal-outcomes
#12
Susanna Timonen, Kaisa Holmberg
BACKGROUND: Intrapartum fetal heart rate monitoring was introduced with the goal to reduce fetal hypoxia and deaths. However, continuous fetal heart rate monitoring has been shown to have a high sensitivity but also a high false-positive rate. To improve specificity, adjunctive technologies have been developed to identify fetuses at risk for intrapartum asphyxia. Intensive research on the value of ST-segment analysis of the fetal electrocardiogram as an adjunct to standard electronic fetal monitoring in lowering the rates of fetal metabolic acidosis and operative deliveries has been ongoing...
June 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29567526/effect-of-modifications-in-mineralized-collagen-fibril-and-extra-fibrillar-matrix-material-properties-on-submicroscale-mechanical-behavior-of-cortical-bone
#13
Yaohui Wang, Ani Ural
A key length scale of interest in assessing the fracture resistance of bone is the submicroscale which is composed of mineralized collagen fibrils (MCF) and extra-fibrillar matrix (EFM). Although the processes through which the submicroscale constituents of bone contribute to the fracture resistance in bone have been identified, the extent of the modifications in submicroscale mechanical response due to the changes in individual properties of MCFs and EFM has not been determined. As a result, this study aims to quantify the influence of individual MCF and EFM material property modifications on the mechanical behavior (elastic modulus, ultimate strength, and resistance to failure) of bone at the submicroscale using a novel finite element modeling approach that incorporate 3D networks of MCFs with three different orientations as well as explicit representation of EFM...
June 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29533983/comparison-of-multiple-bioactive-constituents-in-different-parts-of-eucommia-ulmoides-based-on-uflc-qtrap-ms-ms-combined-with-pca
#14
Ying Yan, Hui Zhao, Cuihua Chen, Lisi Zou, Xunhong Liu, Chuan Chai, Chengcheng Wang, Jingjing Shi, Shuyu Chen
Eucommia ulmoides Oilv. (EU), also called Du-zhong, is a classical traditional Chinese medicine. Its bark, leaf, and male flower are all used for medicinal purposes, called Eucommiae Cortex (EC), Eucommiae Folium (EF), and Eucommiae Flos Male (EFM). In order to study the difference in synthesis and the accumulation of metabolites in different parts of EU, a reliable method based on ultra-fast liquid chromatography tandem triple quadrupole mass spectrometry (UFLC-QTRAP-MS/MS) was developed for the simultaneous determination of a total of 21 constituents, including two lignans, 6 iridoids, 6 penylpropanoids, 6 flavonoids, and one phenol in the samples (EC, EF, and EFM)...
March 13, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29527573/continuous-electronic-fetal-monitoring-during-labor-a-critique-and-a-reply-to-contemporary-proponents
#15
REVIEW
Thomas P Sartwelle, James C Johnston
A half century after continuous electronic fetal monitoring (EFM) became the omnipresent standard of care for the vast majority of labors in the developed countries, and the cornerstone for cerebral palsy litigation, EFM advocates still do not have any scientific evidence justifying EFM use in most labors or courtrooms. Yet, these EFM proponents continue rationalizing the procedure with a rhetorical fog of meaningless words, misleading statistics, archaic concepts, and a complete disregard for medical ethics...
January 2018: Surgery Journal
https://www.readbyqxmd.com/read/29447043/re-engineering-the-interpretation-of-electronic-fetal-monitoring-to-identify-reversible-risk-for-cerebral-palsy-a-case-control-series
#16
Mark I Evans, Robert D Eden, David W Britt, Shara M Evans, Barry S Schifrin
BACKGROUND: Even key opinion leaders now concede that electronic fetal monitoring (EFM) cannot reliably identify fetal acidemia which many vouch as the only labor mediated pathophysiologic precursor for cerebral palsy (CP). We have developed the "Fetal Reserve Index" - an algorithm combining five dynamic components of EFM (1. Rate, 2. Variability, 3. Accelerations, 4. Decelerations, and 5. Excessive uterine activity) considered individually that are combined with the presence of: 6...
February 28, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29437032/computerised-interpretation-of-the-fetal-heart-rate-during-labour-a-randomised-controlled-trial-infant
#17
Peter Brocklehurst, David Field, Keith Greene, Edmund Juszczak, Sara Kenyon, Louise Linsell, Chris Mabey, Mary Newburn, Rachel Plachcinski, Maria Quigley, Philip Steer, Liz Schroeder, Oliver Rivero-Arias
BACKGROUND: Continuous electronic fetal monitoring (EFM) in labour is widely used and computerised interpretation has the potential to increase its utility. OBJECTIVES: This trial aimed to find out whether or not the addition of decision support software to assist in the interpretation of the cardiotocograph (CTG) reduced the number of poor neonatal outcomes, and whether or not it was cost-effective. DESIGN: Two-arm individually randomised controlled trial...
February 2018: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/29408586/a-prospective-cohort-study-of-fetal-heart-rate-monitoring-deceleration-area-is-predictive-of-fetal-acidemia
#18
Alison G Cahill, Methodius G Tuuli, Molly J Stout, Julia D López, George A Macones
BACKGROUND: Intrapartum electronic fetal monitoring is the most commonly used tool in obstetrics in the United States; however, which electronic fetal monitoring patterns predict acidemia remains unclear. OBJECTIVE: This study was designed to describe the frequency of patterns seen in labor using modern nomenclature, and to test the hypothesis that visually interpreted patterns are associated with acidemia and morbidities in term infants. We further identified patterns prior to delivery, alone or in combination, predictive of acidemia and neonatal morbidity...
May 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29351210/a-high-sensitivity-electric-field-microsensor-based-on-torsional-resonance
#19
Zhaozhi Chu, Chunrong Peng, Ren Ren, Biyun Ling, Zhouwei Zhang, Hucheng Lei, Shanhong Xia
This paper proposes a high sensitivity electric field microsensor (EFM) based on torsional resonance. The proposed microsensor adopts torsional shutter, which is composed of shielding electrodes and torsional beams. The movable shielding electrodes and the fixed sensing electrodes are fabricated on the same plane and interdigitally arranged. Push-pull electrostatic actuation method is employed to excite the torsional shutter. Simulation results proved that the torsional shutter has higher efficiency of charge induction...
January 19, 2018: Sensors
https://www.readbyqxmd.com/read/29346721/emulsion-electrospinning-of-polytetrafluoroethylene-ptfe-nanofibrous-membranes-for-high-performance-triboelectric-nanogenerators
#20
Pengfei Zhao, Navneet Soin, Kovur Prashanthi, Jinkai Chen, Shurong Dong, Erping Zhou, Zhigang Zhu, Anand Arcot Narasimulu, Carlo D Montemagno, Liyang Yu, Jikui Luo
Electrospinning is a simple, versatile technique for fabricating fibrous nanomaterials with the desirable features of extremely high porosities and large surface areas. Using emulsion electrospinning, polytetrafluoroethylene/polyethene oxide (PTFE/PEO) membranes were fabricated, followed by a sintering process to obtain pure PTFE fibrous membranes, which were further utilized against a polyamide 6 (PA6) membrane for vertical contact-mode triboelectric nanogenerators (TENGs). Electrostatic force microscopy (EFM) measurements of the sintered electrospun PTFE membranes revealed the presence of both positive and negative surface charges owing to the transfer of positive charge from PEO which was further corroborated by FTIR measurements...
February 14, 2018: ACS Applied Materials & Interfaces
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