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https://www.readbyqxmd.com/read/29145135/forced-and-long-term-degradation-assays-of-tenoxicam-piroxicam-and-meloxicam-in-river-water-degradation-products-and-adsorption-to-sediment
#1
Juan J Jiménez, Beatriz E Muñoz, María I Sánchez, Rafael Pardo
The fate of the pharmaceutical drugs tenoxicam, piroxicam and meloxicam in river water is evaluated here for first time. So, biological, photochemical and thermal degradation assays have been conducted to estimate their degradation rates and know their degradation products. Results indicated that the direct sunlight irradiation, without any protection, promoted a fast degradation of the oxicams while the chemical reactions in solution were less important. The biological degradation in water was negligible except for tenoxicam in whose case its influence was scarce...
October 25, 2017: Chemosphere
https://www.readbyqxmd.com/read/29144740/identification-synthesis-and-safety-assessment-of-thidiazuron-1-phenyl-3-1-2-3-thidiazol-5-yl-urea-and-its-metabolites-in-kiwifruits
#2
Zhiwei Zhang, Haihua Yang, Zhenhong Gao, Yahong Yuan, Jing Dong, Yuan Wang, Tianli Yue
Quality of kiwifruit became worse due to the abuse of plant growth regulators (PGRs). The safety of the fruits treated with PGRs are also worried by consumers. Therefore, the present study analysed the structure of thidiazuron (TDZ, (1-phenyl-3-(1,2,3-thidiazol-5-yl)urea)) (1) and its metabolites of bio-transformation in kiwifruits by using liquid chromatography hybrid ion trap time-of-flight mass spectrometry (LC-IT-TOF-MS). Standard compounds were also synthesized and used for structural identification of those metabolites...
November 16, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29144587/characterization-of-complex-heterogeneous-lipid-a-samples-using-hplc-ms-ms-technique-iii-positive-ion-mode-tandem-mass-spectrometry-to-reveal-phosphorylation-and-acylation-patterns-of-lipid-a
#3
Viktor Sándor, Anikó Kilár, Ferenc Kilár, Béla Kocsis, Ágnes Dörnyei
In this study, we report the detailed analysis of the fragmentation patterns of positively charged lipid A species based on their tandem mass spectra obtained under low-energy collision-induced dissociation conditions of an electrospray quadrupole time-of-flight mass spectrometers. The tandem mass spectrometry experiments were performed after the separation of the compounds with a reversed-phase high performance liquid chromatography method. We found that both, phosphorylated and nonphosphorylated lipid A molecules can be readily ionized in the positive-ion mode by adduct formation with triethylamine added to the eluent...
November 16, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/29143879/comparison-of-analytical-tools-appropriate-for-identification-of-proteinaceous-additives-in-historical-mortars
#4
Iva Krizova, Julia Schultz, Ivan Nemec, Radomir Cabala, Radovan Hynek, Stepanka Kuckova
Natural organic additives such as eggs, lard, resins, and oils have been added to mortars since ancient times, because the ancient builders knew of their positive effect on the mortar quality. The tradition of adding organic materials to mortars was commonly handed down only verbally for thousands years. However, this practice disappeared in the nineteenth century, when the usage of modern materials started. Today, one of the most recent topics in the industry of building materials is the reusing of natural organic materials and searching for the forgotten ancient recipes...
November 16, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29142614/repeatability-analysis-of-airborne-electromagnetic-surveys
#5
Avril Hegarty, Gerry Stanley, Eugene Kashdan, Jim Hodgson, Andrew C Parnell
Purpose: We provide methods for determining the repeatability of airborne electromagnetic surveys when conducted at different altitudes over a number of repeated flights. Our data arise from the TELLUS project carried out by the Geological Surveys of Ireland and Northern Ireland and we examine the repeatability of the apparent resistivity at different frequencies. Methods: After considering a number of issues with the data, we propose two different models from the functional data analysis literature; a Weiner process with random effects, and a penalised spline smoother...
2017: Math Ind Case Stud
https://www.readbyqxmd.com/read/29141132/intra-species-volatile-interactions-affects-growth-rates-and-exometabolomes-in-aspergillus-oryzae-kccm-60345
#6
Digar Singh, Choong Hwan Lee
The volatile organic compounds (VOCs) are increasingly been recognized as the chemical mediators of mold interactions shaping their community dynamic, growth, and metabolism. Herein, we selectively examined the time-correlated (0 D - 11 D) effects of intra-species VOCs mediated interactions (VMI) on Aspergillus oryzae KCCM 60345 (S1), following co-cultivation with partner strain A. oryzae KACC 44967 (S2), in specially designed twin plate assembly. The comparative evaluation of S1VMI (S1 subjected to VMI with S2) and its control (S1con) showed a notable disparity in their radial growth (S1VMI<S1con) at 5 D, protease activity (S1VMI>S1con) at 3-5 D, amylase activity (S1VMI<S1con) at 3-5 D, and antioxidant levels (S1VMI>S1con) at 3 D...
November 15, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29140981/wavelet-brain-angiography-suggests-arteriovenous-pulse-wave-phase-locking
#7
William E Butler
When a stroke volume of arterial blood arrives to the brain, the total blood volume in the bony cranium must remain constant as the proportions of arterial and venous blood vary, and by the end of the cardiac cycle an equivalent volume of venous blood must have been ejected. I hypothesize the brain to support this process by an extraluminally mediated exchange of information between its arterial and venous circulations. To test this I introduce wavelet angiography methods to resolve single moving vascular pulse waves (PWs) in the brain while simultaneously measuring brain pulse motion...
2017: PloS One
https://www.readbyqxmd.com/read/29140413/comparison-of-chemical-constituents-in-scrophulariae-radix-processed-by-different-methods-based-on-uflc-ms-combined-with-multivariate-statistical-analysis
#8
Shengnan Wang, Yujiao Hua, Lisi Zou, Xunhong Liu, Ying Yan, Hui Zhao, Yiyuan Luo, Juanxiu Liu
Scrophulariae Radix is one of the most popular traditional Chinese medicines (TCMs). Primary processing of Scrophulariae Radix is an important link which closely related to the quality of products in this TCM. The aim of this study is to explore the influence of different processing methods on chemical constituents in Scrophulariae Radix. The difference of chemical constituents in Scrophulariae Radix processed by different methods was analyzed by using ultra fast liquid chromatography-triple quadrupole-time of flight mass spectrometry coupled with principal component analysis and orthogonal partial least squares discriminant analysis...
November 13, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/29139068/minor-corral-changes-and-adoption-of-good-handling-practices-can-improve-the-behavior-and-reduce-cortisol-release-in-nellore-cows
#9
Maria Lúcia Pereira Lima, João Alberto Negrão, Claudia Cristina Paro de Paz, Temple Grandin
Inadequate corral facilities and improper handling are major causes of stress in beef cattle. The purpose of this study was to evaluate the effects of minor changes in the corral and adoption of good handling practices on the behavior, cortisol release, and time spent taking blood samples in Nellore cows. Minor corral changes included obstructing the cow's vision when the handler walked deep into the animal's flight zone and the elimination of bright objects, color contrasts, puddles, shadows, and darkness in the corral...
November 14, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29138856/differentially-expressed-proteins-in-the-human-esophageal-cancer-cell-line-eca%C3%A2-109-in-the-presence-and-absence-of-gemcitabine
#10
Zenghuang Ma, Xiaojie Xue
The present study aimed to screen and study the roles of differentially expressed proteins in the human esophageal cancer cell line Eca‑109, in the presence and absence of gemcitabine (GEM). The 3‑(4,5)‑dimethylthiahiazo (-z-y1)-3,5-di-phenytetrazoliumromide (MTT) method was used to assay the vitality of the Eca‑109 cells following treatment with GEM (1‑16 µg/ml). The cell apoptosis was measured by using fluorescence activated cell sorting. The proteins in the treated Eca‑109 cells were extracted, validated, and assayed via two‑dimensional gel electrophoresis combined with matrix‑assisted laser desorption/ionization time of flight mass spectrometry (MALDI‑TOF‑MS)...
November 14, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29138824/genetic-mutational-testing-of-chinese-children-with-familial-hematuria-with-biopsy%C3%A2-proven-fsgs
#11
Yongzhen Li, Ying Wang, Qingnan He, Xiqiang Dang, Yan Cao, Xiaochuan Wu, Shuanghong Mo, Xiaoxie He, Zhuwen Yi
Focal segmental glomerulosclerosis (FSGS) is a pathological lesion rather than a disease, with a diverse etiology. FSGS may result from genetic and non‑genetic factors. FSGS is considered a podocyte disease due to the fact that in the majority of patients with proven‑FSGS, the lesion results from defects in the podocyte structure or function. However, FSGS does not result exclusively from podocyte‑associated genes, however also from other genes including collagen IV‑associated genes. Patients who carry the collagen type IVA3 chain (COL4A3) or COL4A4 mutations usually exhibit Alport Syndrome (AS), thin basement membrane neuropathy or familial hematuria (FH)...
November 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29138467/bacillus-classification-based-on-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-effects-of-culture-conditions
#12
Lin-Jie Shu, Yu-Liang Yang
Matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) is a reliable and rapid technique applied widely in the identification and classification of microbes. MALDI-TOF MS has been used to identify many endospore-forming Bacillus species; however, endospores affect the identification accuracy when using MALDI-TOF MS because they change the protein composition of samples. Since culture conditions directly influence endospore formation and Bacillus growth, in this study we clarified how culture conditions influence the classification of Bacillus species by using MALDI-TOF MS...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29137652/characterization-of-streptococcus-pneumoniae-isolates-from-austrian-companion-animals-and-horses
#13
Maximilian Ginders, Michael Leschnik, Frank Künzel, Doris Kampner, Claudia Mikula, Georg Steindl, Inga Eichhorn, Andrea T Feßler, Stefan Schwarz, Joachim Spergser, Igor Loncaric
BACKGROUND: The aim of the present study was to investigate the genetic relatedness and the antimicrobial resistance profiles of a collection of Austrian Streptococcus pneumoniae isolates from companion animals and horses. A total of 12 non-repetitive isolates presumptively identified as S. pneumoniae were obtained during routinely diagnostic activities between March 2009 and January 2017. RESULTS: Isolates were confirmed as S. pneumoniae by bile solubility and optochin susceptibility testing, matrix-assisted laser desorption-ionization-time of flight (MALDI-TOF) mass spectrometry and sequence analysis of a part recA and the 16S rRNA genes...
November 14, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/29137455/metal-ion-interactions-induced-p-i-n-junction-in-methylammonium-lead-triiodide-perovskite-single-crystals
#14
Ting Wu, Rupam Mukherjee, Olga S Ovchinnikova, Liam Collins, Mahshid Ahmadi, Wei Lu, Nam-Goo Kang, Jimmy W Mays, Stephen Jesse, David Mandrus, Bin Hu
Hybrid perovskites, as emerging multifunctional semiconductors, have demonstrated dual electronic/ionic conduction properties. Here we report a metal/ion interaction induced p-i-n junction across slightly n-type doped MAPbI3 single crystals with Au/MAPbI3/Ag configuration based on interface depend-ent Seebeck effect, Hall effect and time-of-flight secondary ion mass spectrometry analysis. The organic cations (MA(+)) are shown to interact with Au atoms, forming positively charged coordination complexes at Au/MAPbI3 interface, while iodine anions (I(-)) can react with Ag contacts, leading to interfacial ionic polarization...
November 15, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29137232/integration-of-metabolomics-transcriptomics-and-microrna-expression-profiling-reveals-a-mir-143-hk2-glucose-network-underlying-zinc-deficiency-associated-esophageal-neoplasia
#15
Louise Y Fong, Ruiyan Jing, Karl J Smalley, Cristian Taccioli, Johannes Fahrmann, Dinesh K Barupal, Hansjuerg Alder, John L Farber, Oliver Fiehn, Carlo M Croce
Esophageal squamous cell carcinoma (ESCC) in humans is a deadly disease associated with dietary zinc (Zn)-deficiency. In the rat esophagus, Zn-deficiency induces cell proliferation, alters mRNA and microRNA gene expression, and promotes ESCC. We investigated whether Zn-deficiency alters cell metabolism by evaluating metabolomic profiles of esophageal epithelia from Zn-deficient and replenished rats vs sufficient rats, using untargeted gas chromatography time-of-flight mass spectrometry (n = 8/group). The Zn-deficient proliferative esophagus exhibits a distinct metabolic profile with glucose down 153-fold and lactic acid up 1...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137123/proteomic-characterization-of-the-venom-of-five-bombus-thoracobombus-species
#16
Nezahat Pınar Barkan, Mustafa Bilal Bayazit, Duygu Ozel Demiralp
Venomous animals use venom, a complex biofluid composed of unique mixtures of proteins and peptides, to act on vital systems of the prey or predator. In bees, venom is solely used for defense against predators. However, the venom composition of bumble bees (Bombus sp.) is largely unknown. The Thoracobombus subgenus of Bombus sp. is a diverse subgenus represented by 14 members across Turkey. In this study, we sought out to proteomically characterize the venom of five Thoracobombus species by using bottom-up proteomic techniques...
November 11, 2017: Toxins
https://www.readbyqxmd.com/read/29136888/urinary-metal-and-metalloid-biomarker-study-of-henoch-schonlein-purpura-nephritis-using-inductively-coupled-plasma-orthogonal-acceleration-time-of-flight-mass-spectrometry
#17
Zhifen Deng, Zhicong Yang, Xue Ma, Xiaoli Tian, Liangliang Bi, Bin Guo, Wei Wen, Huayun Han, Yanjie Huang, Shusheng Zhang
To obtain a better understanding as to whether concentration alterations of metals and metalloids in urine were related to Henoch-Schonlein purpura nephritis (HSPN), the profiles of as many as 29 elements in urine were compared among three groups, the Henoch-Schonlein purpura (HSP), HSPN and a healthy control group. To this end, a reliable method has been developed for the simultaneous quantification of multiple elements including Li, Be, B, Al, Sc, Ti, V, Cr, Mn, Fe, Ni, Co, Cu, Zn, Ga, Ge, As, Se, Rb, Sr, Mo, Cd, Sn, Sb, Cs, Ba, Tl, Pb and Bi in urine using inductively coupled plasma orthogonal acceleration time-of-flight mass spectrometry (ICP-oa-TOF-MS)...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136836/detection-of-new-emerging-type-a-trichothecenes-by-untargeted-mass-spectrometry
#18
Jesús M González-Jartín, Amparo Alfonso, María J Sainz, Mercedes R Vieytes, Luis M Botana
Mycotoxins occur naturally as agricultural contaminants all over the world. The toxic effects of some of their metabolites are known and their presence regulated in food and feed. This paper describes two methods for the detection of toxins of type-A trichothecenes group, and their modified forms, using mass spectrometry. Ultra-performance liquid chromatography coupled to mass spectrometry-ion trap-time of flight (UPLC-MS-IT-TOF) was employed to characterize the fragmentation pathways of 10 type-A trichothecenes, and characteristic ions were tentatively identified in scan mode through their accurate masses...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136820/fluorescent-ligand-fishing-combination-with-in-situ-imaging-and-characterizing-to-screen-hsp-90-inhibitors-from-curcuma-longa-l-based-on-inp-zns-quantum-dots-embedded-mesoporous-nanoparticles
#19
Yue Hu, Anchen Fu, Zhaoyi Miao, Xiaojing Zhang, Tianlin Wang, An Kang, Jinjun Shan, Dong Zhu, Wei Li
Although ligand fishing has been shown to be an efficient technique for the identification of bioactive components from complex mixtures such as natural products, it cannot be applied to biomedical image processing. Herein, a specific fluorescent ligand fishing combined with in situ imaging approach is presented for the identification of heat shock protein 90 (Hsp 90) inhibitors from complex matrixes, Curcuma longa L., using N-terminus immobilized Hsp 90α functionalized InP/ZnS quantum dots embedded mesoporous nanoparticles (i...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136416/daily-shoulder-pain-among-flight-baggage-handlers-and-its-association-with-work-tasks-and-upper-arm-postures-on-the-same-day
#20
Eva L Bergsten, Svend Erik Mathiassen, Lydia Kwak, Eva Vingård
Objectives: This study of flight baggage handlers aimed at examining the extent to which shoulder pain developed during single work shifts, and whether a possible development was associated with biomechanical exposures and psychosocial factors during the same shift. Methods: Data were collected during, in total, 82 work shifts in 44 workers. Right and left shoulder pain intensity was rated just before and just after the shift (VAS scale 0-100 mm). Objective data on 'time in extreme' and 'time in neutral' upper arm postures were obtained for the full shift using accelerometers, and the baggage handlers registered the number of 'aircrafts handled' in a diary...
November 10, 2017: Annals of Work Exposures and Health
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