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https://www.readbyqxmd.com/read/28646311/removal-of-arsenic-iii-v-by-a-granular-mn-oxide-doped-al-oxide-adsorbent-surface-characterization-and-performance
#1
Kun Wu, Jin Zhang, Bing Chang, Ting Liu, Furong Zhang, Pengkang Jin, Wendong Wang, Xiaochang Wang
In order to remove arsenic (As) from contaminated water, granular Mn-oxide-doped Al oxide (GMAO) was fabricated using the compression method with the addition of organic binder. The analysis results of XRD, SEM, and BET indicated that GMAO was microporous with a large specific surface area of 54.26 m(2/)g, and it was formed through the aggregation of massive Al/Mn oxide nanoparticles with an amorphous pattern. EDX, mapping, FTIR, and XPS results showed the uniform distribution of Al/Mn elements and numerous hydroxyl groups on the adsorbent surface...
June 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28643782/group-additivity-pourbaix-diagrams-advocate-thermodynamically-stable-nanoscale-clusters-in-aqueous-environments
#2
Lindsay A Wills, Xiaohui Qu, I-Ya Chang, Thomas J L Mustard, Douglas A Keszler, Kristin A Persson, Paul Ha-Yeon Cheong
The characterization of water-based corrosion, geochemical, environmental and catalytic processes rely on the accurate depiction of stable phases in a water environment. The process is aided by Pourbaix diagrams, which map the equilibrium solid and solution phases under varying conditions of pH and electrochemical potential. Recently, metastable or possibly stable nanometric aqueous clusters have been proposed as intermediate species in non-classical nucleation processes. Herein, we describe a Group Additivity approach to obtain Pourbaix diagrams with full consideration of multimeric cluster speciation from computations...
June 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28639310/high-resolution-31-p-echo-planar-spectroscopic-imaging-in-vivo-at-7t
#3
Andreas Korzowski, Peter Bachert
PURPOSE: Conventional (31) P chemical shift imaging is time-consuming and yields only limited spatial resolution. The purpose of this study was to demonstrate feasibility of (31) P echo-planar spectroscopic imaging (EPSI) in vivo at 7T. METHODS: A 3D (31) P EPSI sequence with trapezoidal-shaped gradient pulses was implemented on a 7T MR scanner. To increase spectral width with reduced demand on gradient performance, a multishot approach was chosen. Acquisition weighting and (31) P-{(1) H} double resonance for nuclear Overhauser signal enhancement were applied to increase sensitivity...
June 21, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28633562/advances-in-imaging-brain-metabolism
#4
Fahmeed Hyder, Douglas L Rothman
Metabolism is central to neuroimaging because it can reveal pathways by which neuronal and glial cells use nutrients to fuel their growth and function. We focus on advanced magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) methods used in brain metabolic studies. (17)O-MRS and (31)P-MRS, respectively, provide rates of oxygen use and ATP synthesis inside mitochondria, whereas (19)F-MRS enables measurement of cytosolic glucose metabolism. Calibrated functional MRI (fMRI), an advanced form of fMRI that uses contrast generated by deoxyhemoglobin, provides maps of oxygen use that track neuronal firing across brain regions...
June 21, 2017: Annual Review of Biomedical Engineering
https://www.readbyqxmd.com/read/28632011/essential-public-health-competencies-for-medical-students-establishing-a-consensus-in-family-medicine
#5
Christopher P Morley, Scott R Rosas, Ranit Mishori, William Jordan, Yumi Shitama Jarris, Family Medicine/Public Health Competencies Work Group, Jacob Prunuske
Phenomenon: The integration of public health (PH) competency training into medical education, and further integration of PH and primary care, has been urged by the U.S. Institute of Medicine. However, PH competencies are numerous, and no consensus exists over which competencies are most important for adoption by current trainees. Our objective was to conduct a group concept mapping exercise with stakeholders identifying the most important and feasible PH skills to incorporate in medical and residency curricula...
March 2, 2017: Teaching and Learning in Medicine
https://www.readbyqxmd.com/read/28629043/carbon-quantum-dots-from-carbonized-walnut-shells-structural-evolution-fluorescence-characteristics-and-intracellular-bioimaging
#6
Chaoge Cheng, Yanni Shi, Min Li, Malcolm Xing, Qilin Wu
Carbon quantum dots (CQDs) have attracted tremendous attention for their prominent fluorescence, excellent stability, and outstanding biocompatibility. Herein, we report a facile method to prepare CQDs from walnut shells, which mainly consist of natural cellulose. After carbonization of the walnut shells and acid treatments, zigzag and armchair edges of CQDs with an average size of 3.4nm were revealed by the high-resolution transmission electron microscopy. Consistent with the (100) planes of graphitic carbon, the lattice spacing distance of these CQDs was 0...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28625244/-establishment-of-porcine-model-of-prolonged-cardiac-arrest-and-cardiopulmonary-resuscitation-electrically-induced-by-ventricular-fibrillation
#7
Cai Wen, Heng Li, Xiaozhu Zhai, Youde Ding, Huatao Zhou, Zhiming Ouyang, Zhengfei Yang, Longyuan Jiang, Wanchun Tang, Tao Yu
OBJECTIVE: To investigate the optimal injury time point of cardiac arrest (CA) induced electrically, and establish a reproducible prolonged CA and cardiopulmonary resuscitation (CPR) model in pigs. METHODS: Forty healthy domestic male pigs were randomly divided into four groups, which were ventricular fibrillation (VF) 8, 10, 11, and 12 minutes groups, each group for 10 animals. In these groups, VF was induced by alternating current delivered to right ventricular endocardium and untreated for 8, 10, 11, and 12 minutes, respectively, followed by 6 minutes of CPR procedure...
June 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28596776/genome-wide-association-mapping-of-loci-associated-with-plant-growth-and-forage-production-under-salt-stress-in-alfalfa-medicago-sativa-l
#8
Xiang-Ping Liu, Long-Xi Yu
Salinity tolerance is highly desirable to sustain alfalfa production in marginal lands that have been rendered saline. In this study, we used a diverse panel of 198 alfalfa accessions for mapping loci associated with plant growth and forage production under salt stress using genome-wide association studies (GWAS). The plants were genotyped using genotyping-by-sequencing (GBS). A greenhouse procedure was used for phenotyping four agronomic and physiological traits affected by salt stress, including dry weight (DW), plant height (PH), leaf chlorophyll content (LCC), and stomatal conductance (SC)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28596035/the-pharmacokinetic-and-pharmacodynamic-properties-of-site-specific-pegylated-genetically-modified-recombinant-human-interleukin-11-in-normal-and-thrombocytopenic-monkeys
#9
Shan-Shan Ma, Seong-Hyun Ho, Su-Yong Ma, Yue-Juan Li, Kai-Tong Li, Xiao-Chuang Tang, Guang-Rong Zhao, Song-Shan Xu
In order to improve the pharmacokinetic and pharmacodynamic properties of recombinant human interleukin-11 mutein (mIL-11) and to reduce the frequency of administration, we examined the feasibility of chemical modification of mIL-11 by methoxy polyethylene glycol succinimidyl carbonate (mPEG-SC). PEG-mIL-11 was prepared by a pH controlled amine specific method. Bioactivity of the protein was determined in a IL-11-dependent in vitro bioassay, its pharmacodynamic and pharmacokinetic properties were investigated by using normal and thrombocytopenic monkey models...
June 5, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28590070/chemical-exchange-rotation-transfer-imaging-of-intermediate-exchanging-amines-at-2%C3%A2-ppm
#10
Zhongliang Zu, Elizabeth A Louie, Eugene C Lin, Xiaoyu Jiang, Mark D Does, John C Gore, Daniel F Gochberg
Chemical exchange saturation transfer (CEST) imaging of amine protons exchanging at intermediate rates and whose chemical shift is around 2 ppm may provide a means of mapping creatine. However, the quantification of this effect may be compromised by the influence of overlapping CEST signals from fast-exchanging amines and hydroxyls. We aimed to investigate the exchange rate filtering effect of a variation of CEST, named chemical exchange rotation transfer (CERT), as a means of isolating creatine contributions at around 2 ppm from other overlapping signals...
June 7, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28580407/mc3t3-osteoblast-like-cells-cultured-at-alkaline-ph-microarray-data-affymetrix-genechip-mouse-2-0-st
#11
Anne-Marie Galow, Alexander Rebl, Dirk Koczan, Jan Gimsa
It is well known that pH plays a pivotal role in the control of bone remodeling. However, no comprehensive gene expression data are available for the effects of alkaline pH on osteoblasts. We cultured differentiating MC3T3-E1 osteoblast-like cells at pH 7.4, 7.8, and 8.4 for 14 days. To identify differential gene expression, microarray data were collected with Affymetrix GeneChips. The data were validated by real-time PCRs for five genes that were found to be greatly regulated in the GeneChip-experiments (DMP1, FABP4, SFRP2 and TNFRSF19) or considered relevant for the terminal function of osteoblasts (DMP1 and ATF4)...
August 2017: Data in Brief
https://www.readbyqxmd.com/read/28576641/a-quantitative-study-of-the-intracellular-fate-of-ph-responsive-doxorubicin-polypeptide-nanoparticles
#12
Jing Wang, Jayanta Bhattacharyya, Eric Mastria, Ashutosh Chilkoti
Nanoscale carriers with an acid-labile linker between the carrier and drug are commonly used for drug delivery. However, their efficacy is potentially limited by inefficient linker cleavage, and lysosomal entrapment of drugs. To address these critical issues, we developed a new imaging method that spatially overlays the location of a nanoparticle and the released drug from the nanoparticle, on a map of the local intracellular pH that delineates individual endosomes and lysosomes, and the therapeutic intracellular target of the drug-the nucleus...
May 30, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28574069/surface-enhanced-hyper-raman-hyperspectral-imaging-and-probing-in-animal-cells
#13
Zsuzsanna Heiner, Marina Gühlke, Vesna Živanović, Fani Madzharova, Janina Kneipp
Hyper Raman scattering, that is, spontaneous, two-photon excited Raman scattering, of organic molecules becomes strong when it occurs as surface-enhanced hyper Raman scattering (SEHRS), in the proximity of plasmonic nanostructures. Its advantages over one-photon excited surface-enhanced Raman scattering (SERS) include complementary vibrational information resulting from different selection rules, probing of very small focal volumes, and beneficial excitation with long wavelengths. Here, imaging of macrophage cells by SEHRS is demonstrated, using SEHRS labels consisting of silver nanoparticles and two different molecules, 2-naphthalenethiol and para-mercaptobenzoic acid, that are excited off-resonance...
June 2, 2017: Nanoscale
https://www.readbyqxmd.com/read/28550749/a-novel-non-enzymatic-glucose-sensor-based-on-the-modification-of-carbon-paste-electrode-with-cuo-nanoflower-designing-the-experiments-by-response-surface-methodology-rsm
#14
Zahra Amani-Beni, Alireza Nezamzadeh-Ejhieh
A non enzymatic modified electrode was constructed based on the modification of carbon paste electrode with CuO nanoflower (CuO-CPE). The raw and modified samples were characterized by XRD, TEM, SEM-EDX and X-ray mapping techniques. The proposed CuO-CPE showed a well voltammetric peak pair in cyclic voltammetry which of peak currents were decreased in the presence of glucose. Hence, this decrease in peak current was used for voltammetric determination of glucose. To evaluate interactions between the influencing variables, experiments were designed by response surface methodology (RSM) and the results showed CuO%-pH have the most effect on square wave voltammetric response...
May 19, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28543840/imaging-of-nuclear-overhauser-enhancement-at-7-and-3%C3%A2-t
#15
Yuanyu Shen, Gang Xiao, Zhiwei Shen, Xiaolei Zhang, Xiangyong Tang, Wei Hu, Zhiyan Zhang, Jitian Guan, Renhua Wu
Nuclear Overhauser enhancement (NOE) is a type of magnetization transfer using cross-relaxation. It originates from mobile macromolecules, which may have relevance to the evaluation of tumor features. We studied the value of NOE imaging at 7 and 3 T and suggest a utility for diagnosing human brain tumors. Two types of protein solution at different concentrations and pH values, and six normal Sprague Dawley (SD) rats, were used to detect NOE signal with a 7 T scanner. Then, six healthy volunteers and 11 patients with brain tumors (six gliomas and five meningiomas) were included at 3 T...
May 24, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28541895/noncontact-electrical-permittivity-mapping-and-ph-sensitive-films-for-osseointegrated-prosthesis-and-infection-monitoring
#16
Sumit Gupta, Kenneth J Loh
The objective of this study is to develop a noncontact, noninvasive system for detecting and monitoring subcutaneous infection occurring at the tissue and osseointegrated prosthesis interface. It is known that the local pH of tissue can change due to infection. Therefore, the sensing system integrates two parts, namely, pH-sensitive thin films that can be coated onto prosthesis surfaces prior to them being implanted and an electrical capacitance tomography (ECT) algorithm that can reconstruct the spatial permittivity distribution of a region of space in a noncontact fashion...
May 23, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28540470/effects-of-remifentanil-pretreatment-on-bupivacaine-cardiotoxicity-in-rats
#17
Özcan Pişkin, Hilal Ayoğlu
Unintentional intravascular administration of bupivacaine may cause local anesthetic systemic toxicity (LAST). Although many systems are affected in LAST, the cardiovascular effects can be life-threatening. Remifentanil is a selective, ultra-short-acting, µ-opioid receptor agonist opioid. This study assessed the effects of combined pretreatment with intravenous lipid emulsion (ILE) and remifentanil on the cardiotoxicity caused by bupivacaine in an experimental model of anesthetized rats. The rats were divided into three groups...
May 24, 2017: Cardiovascular Toxicology
https://www.readbyqxmd.com/read/28539199/respiratory-severity-score-and-extubation-readiness-in-very-low-birth-weight-infants
#18
Maroun J Mhanna, Narayan P Iyer, Scott Piraino, Mohit Jain
BACKGROUND: The respiratory severity score (RSS) is a byproduct of mean airway pressure (MAP) and fraction of inspired oxygen (FiO2). We sought to determine whether RSS could be used as a screening tool to predict extubation readiness in very low birth weight (VLBW) infants. METHODS: In a retrospective cohort study, medical records of all VLBW infants admitted to our unit (6/1/09-2/28/12) were reviewed for infants' demographics, prenatal characteristics, and medication use...
May 10, 2017: Pediatrics and Neonatology
https://www.readbyqxmd.com/read/28523639/association-mapping-of-yield-and-yield-related-traits-under-reproductive-stage-drought-stress-in-rice-oryza-sativa-l
#19
B P Mallikarjuna Swamy, Noraziyah Abd Aziz Shamsudin, Site Noorzuraini Abd Rahman, Ramil Mauleon, Wickneswari Ratnam, Ma Teressa Sta Cruz, Arvind Kumar
BACKGROUND: The identification and introgression of major-effect QTLs for grain yield under drought are some of the best and well-proven approaches for improving the drought tolerance of rice varieties. In the present study, we characterized Malaysian rice germplasm for yield and yield-related traits and identified significant trait marker associations by structured association mapping. RESULTS: The drought screening was successful in screening germplasm with a yield reduction of up to 60% and heritability for grain yield under drought was up to 78%...
December 2017: Rice
https://www.readbyqxmd.com/read/28521709/modulation-of-inflammatory-response-to-implanted-biomaterials-using-natural-compounds
#20
Maria Yanez, James Blanchette, Ehsan Jabbarzadeh
Tissue engineering offers a promising strategy to restore injuries resulting from trauma, infection, tumor resection, or other diseases. In spite of significant progress, the field faces a significant bottleneck; the critical need to understand and exploit the interdependencies of tissue healing, angiogenesis, and inflammation. Inherently, the balance of these interacting processes is affected by a number of injury site conditions that represent a departure from physiological environment, including reduced pH, increased concentration of free radicals, hypoglycemia, and hypoxia...
May 10, 2017: Current Pharmaceutical Design
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