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https://www.readbyqxmd.com/read/28443926/defect-induced-ferromagnetism-in-mgo-and-its-exceptional-enhancement-upon-thermal-annealing-a-case-of-transformation-of-various-defect-states
#1
Nimai Pathak, Santosh Kumar Gupta, C L Prajapat, S K Sharma, P S Ghosh, Buddhadev Kanrar, P K Pujari, R M Kadam
MgO particles of few micron size are synthesized through a sol-gel method at different annealing temperatures such as 600 °C (MgO-600), 800 °C (MgO-800) and 1000 °C (MgO-1000). EDX and ICP-AES studies confirmed a near total purity of the sample with respect to paramagnetic metal ion impurities. Magnetic measurements showed a low temperature weak ferromagnetic ordering with a TC (Curie temperature) around 65 K (±5 K). Unexpectedly, the saturation magnetization (Ms) was found to be increased with increasing annealing temperature during synthesis...
April 26, 2017: Physical Chemistry Chemical Physics: PCCP
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
#2
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/28440581/the-toxicity-of-silver-to-soil-organisms-exposed-to-silver-nanoparticles-and-silver-nitrate-in-biosolids-amended-field-soil
#3
Alexander H Jesmer, Jessica R Velicogna, Dina M Schwertfeger, Richard P Scroggins, Juliska I Princz
The use of engineered silver nanoparticles (AgNP) is widespread, with expected release to the terrestrial environment through the application of biosolids onto agricultural lands. The toxicity of AgNP and AgNO3 (as ionic Ag(+) ) to plant (Elymus lanceolatus and Trifolium pratense) and soil invertebrate (Eisenia andrei and Folsomia candida) species was assessed using silver-amended biosolids applied to a natural sandy loam soil. Bioavailable Ag(+) in soil samples was estimated using an ion-exchange technique applied to KNO3 soil extracts while exposure to dispersible AgNP was verified by single particle-ICP-MS and TEM-EDS analysis...
April 25, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28440306/an-evaluation-of-factors-associated-with-pathogenic-prss1-spink1-ctfr-and-or-ctrc-genetic-variants-in-patients-with-idiopathic-pancreatitis
#4
Niloofar Y Jalaly, Robert A Moran, Farshid Fargahi, Mouen A Khashab, Ayesha Kamal, Anne Marie Lennon, Christi Walsh, Martin A Makary, David C Whitcomb, Dhiraj Yadav, Liudmila Cebotaru, Vikesh K Singh
OBJECTIVES: We evaluated factors associated with pathogenic genetic variants in patients with idiopathic pancreatitis. METHODS: Genetic testing (PRSS1, CFTR, SPINK1, and CTRC) was performed in all eligible patients with idiopathic pancreatitis between 2010 to 2015. Patients were classified into the following groups based on a review of medical records: (1) acute recurrent idiopathic pancreatitis (ARIP) with or without underlying chronic pancreatitis; (2) idiopathic chronic pancreatitis (ICP) without a history of ARP; (3) an unexplained first episode of acute pancreatitis (AP)<35 years of age; and (4) family history of pancreatitis...
April 25, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28440265/role-of-jun-amino-terminal-kinase-jnk-in-apoptosis-of-cavernosal-tissue-during-acute-phase-after-cavernosal-nerve-injury
#5
Won Hoon Song, Hwancheol Son, Soo Woong Kim, Jae-Seung Paick, Min Chul Cho
The present study aimed to identify which mitogen-activated protein kinase (p38 or Jun amino-terminal kinase [JNK]) was involved in cavernosal apoptosis during the acute phase after cavernosal nerve crush injury (CNCI) in rats to ameliorate apoptosis of cavernosal tissue, such as smooth muscle (SM). A total of twenty 10-week-old male Sprague-Dawley rats were divided equally into two groups: sham surgery (S) and CNCI (I). The I group approximated the clinical situation of men undergoing radical prostatectomy using two 60-second compressions of both CNs with a microsurgical vascular clamp...
April 18, 2017: Asian Journal of Andrology
https://www.readbyqxmd.com/read/28440049/analytical-based-methodologies-for-examining-the-in-vitro-absorption-distribution-metabolism-and-elimination-adme-of-silver-nanoparticles
#6
Sesha L A Paluri, John D Ryan, Nhi H Lam, Dhriti Nepal, Ioana E Sizemore
The clinical applications of silver nanoparticles (AgNPs) remain limited due to the lack of well-established methodologies for studying their nanokinetics. Hereby, the primary goal is to adapt a suite of analytical-based methodologies for examining the in vitro absorption, distribution, metabolism, and elimination of AgNPs. Vero 76 and HEK 293 cells are exposed to ≈10-nm spherical AgNPs(+) and AgNPs(-) at relevant concentrations (0-300 µg mL(-1) ) and times (4-48 h). Absorption: Inductively coupled plasma optical emission spectroscopy (ICP-OES) demonstrates that the two AgNP formulations are not bioequivalent...
April 25, 2017: Small
https://www.readbyqxmd.com/read/28439784/practical-calculation-method-to-estimate-the-absolute-boron-concentration-in-tissues-using-18-f-fbpa-pet
#7
Tadashi Watabe, Kohei Hanaoka, Sadahiro Naka, Yasukazu Kanai, Hayato Ikeda, Masanao Aoki, Eku Shimosegawa, Mitsunori Kirihata, Jun Hatazawa
PURPOSE: The purpose of this study was to establish a practical method to estimate the absolute boron concentrations in the tissues based on the standardized uptake values (SUVs) after administration of 4-borono-phenylalanine (BPA) using 4-borono-2-(18)F-fluoro-phenylalanine ((18)F-FBPA) PET. METHODS: Rat xenograft models of C6 glioma (n = 7, body weight 241 ± 28.0 g) were used for the study. PET was performed 60 min after intravenous injection of (18)F-FBPA (30...
April 24, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28437442/relationship-between-early-onset-severe-intrahepatic-cholestasis-of-pregnancy-and-higher-risk-of-meconium-stained-fluid
#8
Maria C Estiú, Maria A Frailuna, Carla Otero, Marcela Dericco, Catherine Williamson, Jose J G Marin, Rocio I R Macias
BACKGROUND: Intrahepatic cholestasis of pregnancy (ICP) is the commonest gestational liver disease. The risk of adverse fetal outcome has been associated with the severity of maternal hypercholanemia after diagnosis. OBJECTIVE: To investigate whether there is a relationship between the severity and timing of onset of hypercholanemia and the risk of meconium-stained amniotic fluid (MSAF) and adverse neonatal events. STUDY DESIGN: The study included 382 pregnancies complicated by ICP managed at a referral hospital in Buenos Aires (Argentina) between June 2009 and December 2013...
2017: PloS One
https://www.readbyqxmd.com/read/28436871/a-systematic-approach-for-cross-source-point-cloud-registration-by-preserving-macro-and-micro-structures
#9
Xiaoshui Huang, Jian Zhang, Lixin Fan, Qiang Wu, Chun Yuan
We propose a systematic approach for registering cross-source point clouds that come from different kinds of sensors. This task is especially challenging due to the presence of significant missing data, large variations in point density, scale difference, large proportion of noise and outliers. The robustness of the method is attributed to the extraction of macro and micro structures. Macro structure is the overall structure that maintains similar geometric layout in cross-source point clouds. Micro structure is the element (e...
April 19, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28436146/improving-zinc-accumulation-in-barley-endosperm-using-hvmtp1-a-transition-metal-transporter
#10
Paloma Menguer, Thomas Vincent, Anthony J Miller, James K M Brown, Eva Vincze, Søren Borg, Preben Bach Holm, Dale Sanders, Dorina Podar
Zinc (Zn) is essential for all life forms, including humans. It is estimated that around two billion people are deficient in their Zn intake. Human dietary Zn intake relies heavily on plants, which in many developing countries consists mainly of cereals. The inner part of cereal grain, the endosperm, is the part that is eaten after milling but contains only a quarter of the total grain Zn. Here we present results demonstrating that endosperm Zn content can be enhanced through expression of a transporter responsible for vacuolar Zn accumulation in cereals...
April 24, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28436056/elemental-ion-release-and-cytotoxicity-of-antimicrobial-acrylic-resins-incorporated-with-nanomaterial
#11
Denise Tornavoi de Castro, Mariana Lima da Costa Valente, Carolina Patricia Aires, Oswaldo Luiz Alves, Andréa Cândido Dos Reis
OBJECTIVES: This study evaluated the release of ions and the cytotoxicity of acrylic resins incorporated with silver vanadate decorated with silver nanoparticles (AgVO3 ). BACKGROUND: The inhibition of the accumulation of microorganisms on the resins is critical in preventing diseases. However, the hypothesis is that the release of ions from the incorporation of AgVO3 may be important in biocompatibility. MATERIALS AND METHODS: Specimens of autopolymerising (AP) and heat-polymerising resin (HP) with AgVO3 were prepared and immersed in culture medium...
April 23, 2017: Gerodontology
https://www.readbyqxmd.com/read/28435179/real-time-measurement-of-size-resolved-elemental-composition-ratio-for-flame-synthesized-composite-nanoparticle-aggregates-using-a-tandem-smps-icp-oes
#12
Nathan Reed, Jiaxi Fang, Sanmathi Chavalmane, Pratim Biswas
Composite nanoparticles find application in catalysis, drug delivery, and energy storage and require increasingly fine control of their physical properties and composition. While composite nanoparticles have been widely synthesized and characterized, little work has systematically correlated the initial concentration of precursors and the final composition of flame synthesized composite nanoparticles. This relationship is explored in a diffusion flame aerosol reactor by coupling a scanning mobility particle sizer (SMPS) with an inductively coupled plasma optical emission spectrometer (ICP-OES)...
2017: Aerosol Science and Technology: the Journal of the American Association for Aerosol Research
https://www.readbyqxmd.com/read/28435117/use-of-intracranial-pressure-monitoring-frequently-refutes-diagnosis-of-idiopathic-intracranial-hypertension
#13
David S Xu, Randall J Hlubek, Celene B Mulholland, Kerry L Knievel, Kris A Smith, Peter Nakaji
OBJECTIVE: The diagnosis and management of patients with idiopathic intracranial hypertension (IIH) frequently relies on lumbar puncture to ascertain intracranial pressures. However, pressures derived this way may be spurious due to patient body habitus and behavior. We recently incorporated direct continuous intracranial pressure (ICP) monitoring into the work-up for IIH and review our experience and outcomes. METHODS: Through billing records, we identified all patients during a 3-year period who had a diagnosis of idiopathic intracranial hypertension and who underwent ICP monitoring prior to shunt placement or revision...
April 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28433809/biocorona-formation-on-gold-nanoparticles-modulates-human-proximal-tubule-kidney-cell-uptake-cytotoxicity-and-gene-expression
#14
M T Ortega, J E Riviere, K Choi, N A Monteiro-Riviere
Gold nanoparticles (AuNP) adsorb macromolecules to form a protein corona (PC) after systemic delivery, to which the kidney as the primary excretory organ is constantly exposed. The role of the PC on AuNP cell uptake and toxicity was investigated in vitro in human proximal tubule cells (HPTC) using 40 and 80nm branched polyethylenimine (BPEI), lipoic acid (LA) and polyethylene glycol (PEG) coated AuNP with or without (bare) PCs composed of human plasma (HP) or human serum albumin (HSA) for 0.25 to 24h. Time-dependent intracellular uptake, assessed by ICP-MS showed PC modulated cell uptake and cytotoxicity; with bare 40nm BPEI-AuNP showing the greatest responses...
April 19, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28432507/study-of-the-potential-of-barnyard-grass-for-the-remediation-of-cd-and-pb-contaminated-soil
#15
Jianling Xu, Qiongyao Cai, Hanxi Wang, Xuejun Liu, Jing Lv, Difu Yao, Yue Lu, Wei Li, Yuanyuan Liu
In this study, the microwave digestion method was used to determine total cadmium (Cd) and lead (Pb) concentrations, the BCR method was used to determine different states of Cd and Pb, and atomic absorption spectroscopy (AAS) and inductively coupled plasma optical emission spectrometry (ICP-OES) were used to determine Cd and Pb concentrations in simulated soil and barnyard grass before and after planting barnyard grass to provide a theoretical basis for the remediation of Cd- and Pb-contaminated soil. The results showed that the bioconcentration factor changes with different Cd concentrations are relatively complex and that the removal rate increases regularly...
May 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28431870/the-effect-of-hypertonic-saline-and-mannitol-on-coagulation-in-moderate-traumatic-brain-injury-patients
#16
Haifeng Wang, Hongshi Cao, Xiaohong Zhang, Liang Ge, Li Bie
BACKGROUND: Hyperosmolar therapy, using either hypertonic saline (HTS) or mannitol (MT), is considered the treatment of choice for intracranial hypertension, a disorder characterized by high intracranial pressure (ICP). However, hyperosmolar agents have been postulated to impair coagulation and platelet function. The aim of this study was to identify whether HTS and MT could affect coagulation in moderate traumatic brain injury (TBI) patients. METHODS: In this prospective and randomized double-blind study, we included adult patients with moderate TBI...
April 14, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28429272/electrocatalytic-dechlorination-of-2-3-5-trichlorophenol-on-palladium-carbon-nanotubes-nafion-film-titanium-mesh-electrode
#17
Zhirong Sun, Xiaoyue Ma, Xiang Hu
Palladium/carbon nanotubes-nafion film-modified titanium mesh electrode (Pd/CNTs-nafion film/Ti electrode) was prepared and used for catalytic dechlorination of 2,3,5-trichlorophenol (2,3,5-TCP). The influences of factors, such as Pd(2+) concentration, plating solution pH, and electrodeposition time and current, on the preparation of the electrode were studied by cyclic voltammetry (CV) to establish the optimal electrode preparation conditions. Additionally, the CV results highlighted that the addition of the CNTs-nafion film could enhance the electrochemical performance of the electrode...
April 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28427624/ultrasound-assisted-biodiesel-production-by-a-novel-composite-of-fe-iii-based-mof-and-phosphotangestic-acid-as-efficient-and-reusable-catalyst
#18
Ahmad Nikseresht, Asra Daniyali, Mahdi Ali-Mohammadi, Ahmad Afzalinia, Abbas Mirzaie
In this work, esterification of oleic acid by various alcohols is achieved with high yields under ultrasonic irradiation. This reaction performed with a novel heterogeneous catalyst that fabricated by heteropoly acid and Fe(III)-based MOF, namely MIL-53 (Fe). Syntheses of MIL-53 and encapsulation process carry out by ultrasound irradiation at ambient temperature and atmospheric pressure. The prepared composite was characterized by various techniques such as XRD, FT-IR, SEM, BET and ICP that demonstrate excellent catalytic activities, while being highly convenient to synthesize...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28425536/cisplatin-resistance-in-cell-models-evaluation-of-metallomic-and-biological-predictive-biomarkers-to-address-early-therapy-failure
#19
Marta Espina, Mario Corte-Rodríguez, Leticia Aguado, María Montes-Bayón, Marta I Sierra, Pablo Martínez-Camblor, Elisa Blanco-González, L María Sierra
Cisplatin, one of the most extensively used metallodrugs in cancer treatment, presents the important drawback of patient resistance. This resistance is the consequence of different processes including those preventing the formation of DNA adducts and/or their quick removal. Thus, a tool for the accurate detection and quantitation of cisplatin-induced adducts might be valuable for predicting patient resistance. To prove the validity of such an assumption, highly sensitive plasma mass spectrometry (ICP-MS) strategies were applied to determine DNA adduct levels and intracellular Pt concentrations...
April 20, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28425250/retrospective-analysis-of-maternal-fetal-and-neonatal-outcomesof-intrahepatic-cholestasis-of-pregnancy-at-gazi-university
#20
Berrin Günaydin, Merih Bayram, Melis Altuğ, Semra Cevher, Nuray Bozkurt
BACKGROUND/AIM: Maternal, fetal, and neonatal outcomes in parturients with intrahepatic cholestasis of pregnancy (ICP) have been retrospectively documented. We aimed to present pregnancy outcomes of parturients with ICP who underwent delivery. The study was conducted during a 1-year period. MATERIALS AND METHODS: After ethics committee approval, data from 1 January to 31 December 2015 were collected to identify parturients with ICP. RESULTS: Ten out of 37 patients underwent normal spontaneous vaginal delivery (NSVD), and the remaining 27 parturients underwent cesarean section (CS)...
April 18, 2017: Turkish Journal of Medical Sciences
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