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https://www.readbyqxmd.com/read/28734603/determination-of-volatile-organic-compounds-in-pen-inks-by-a-dynamic-headspace-needle-trap-device-combined-with-gas-chromatography-mass-spectrometry
#1
Xiaohuan Zang, Weiqian Liang, Qingyun Chang, Tong Wu, Chun Wang, Zhi Wang
Some harmful volatile organic compounds (VOCs), such as methylbenzene, ethylbenzene, xylene, chlorobenzene and bromobenzene, are the commonly found chemicals in pen inks. In this work, a dynamic headspace needle-trap device (D-HS-NTD) with a ZIF-8-derived nanoporous carbon (ZIF-8-NPC) as the adsorbent was developed for the extraction of some VOCs in different pen inks prior to GC-MS detection. The main important influencing experimental parameters including the flow rate of the purge gas N2, extraction temperature, extraction time, desorption temperature and desorption time for the extraction were optimized to obtain a high extraction efficiency...
July 11, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28734360/revealing-the-biography-of-a-hidden-medieval-manuscript-using-synchrotron-and-conventional-imaging-techniques
#2
E Pouyet, S Devine, T Grafakos, R Kieckhefer, J Salvant, L Smieska, A Woll, A Katsaggelos, O Cossairt, M Walton
Reading the content of hidden texts from ancient manuscripts has become an increasingly important endeavor thanks to the variety of non-destructive analytical tools and image processing routines available for this task. In this study, portable macro X-Ray Fluorescence (MA-XRF-tube), Visible Hyperspectral Imaging (HSI) together with Synchrotron based macro X-Ray Fluorescence (MA-XRF-SR) are combined with signal processing methods to reveal the biography of a degraded manuscript recycled as binding material for a 16th century printed edition of Hesiod's Works and Days...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28733722/non-specific-chronic-low-back-pain-differences-in-spinal-kinematics-in-subgroups-during-functional-tasks
#3
Rebecca Hemming, Liba Sheeran, Robert van Deursen, Valerie Sparkes
PURPOSE: A multidimensional classification approach suggests that motor control impairment subgroups exist in non-specific chronic low back pain (NSCLBP). Differences in sitting lumbar posture have been identified between two such subgroups [flexion pattern (FP) and active extension pattern (AEP)] and healthy individuals; however, functional spinal movement has not been explored. This study will evaluate whether NSCLBP subgroups exhibit regional spinal kinematic differences, compared to healthy individuals, during functional tasks...
July 21, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28733232/rifm-fragrance-ingredient-safety-assessment-2-2-4-trimethyl-4-phenyl-butane-nitrile-cas-registry-number-75490-39-0
#4
A M Api, D Belsito, D Botelho, D Browne, M Bruze, G A Burton, J Buschmann, M L Dagli, M Date, W Dekant, C Deodhar, A D Fryer, K Joshi, S La Cava, A Lapczynski, D C Liebler, D O'Brien, R Parakhia, A Patel, T M Penning, G Ritacco, J Romine, D Salvito, T W Schultz, I G Sipes, Y Thakkar, Y Tokura, S Tsang, J Wahler
No abstract text is available yet for this article.
July 18, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28732306/photostability-testing-using-online-reactor-hplc-hyphenation-and-mass-spectrometric-compound-identification-illustrated-by-ketoprofen-as-model-compound
#5
Jaber Assaf, Diego Zulkiewicz Gomes, Bernhard Wuest, Maria Kristina Parr
Investigations on the photochemical stability of pharmaceutical substances are mandatory in drug development and licensing as photo-induced degradation of an active pharmaceutical ingredient (API) may not only lead to decreased API concentrations but also to toxic or reactive products. Thus, the US Food and Drug Administration (FDA) and the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) issued Guidance for Industry Q1B "Photostability Testing of New Drug Substances and Products" for testing of pure but also packed drugs...
July 8, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28731877/simple-preoperative-ink-test-as-a-novel-adjunct-to-intrastromal-keratopigmentation-for-post-laser-peripheral-iridotomy-dysphotopsias
#6
Stephan Ong Tone, Daniel Q Li, Zach Ashkenazy, Armand Borovik, Allan R Slomovic, David S Rootman, Clara C Chan
PURPOSE: To describe a simple preoperative ink test as a novel adjunct to intrastromal keratopigmentation for post-laser peripheral iridotomy (LPI) dysphotopsias. METHODS: A surgical marking pen is applied to the area over a peripheral iridotomy before intrastromal keratopigmentation. The patient can then assess whether there is any improvement in their symptoms of dysphotopsias. Manual intrastromal keratopigmentation can then be performed using a crescent blade into the clear cornea at 50% depth and tunneled centrally to create a pocket ensuring that the peripheral iridotomy is fully occluded...
July 19, 2017: Cornea
https://www.readbyqxmd.com/read/28731301/lead-ii-complexes-of-amino-acids-peptides-and-other-related-ligands-of-biological-interest
#7
Etelka Farkas, Péter Buglyó
Lead(II) forms (NH2,COO-)-chelated mono- and bis-complexes with simple amino acids, while mono-complexes with pH-dependent coordination modes exist with simple dipeptides. These mostly hemidirected complexes have moderate stability. While a weak interaction of side chain imidazole and carboxylate in lead(II)-aminoacidato complexes is found, the thiolate group has an exceptionally high affinity to this metal ion. For example, tridentate (NH2,COO-,S-)-coordination of penicillamine (Pen) and cysteine (Cys) results in an extremely strong interaction with lead(II), but, owing to the sterical effect of the 6s2 pair, a second ligand is not able to coordinate in the above mentioned tridentate way...
April 10, 2017: Metal Ions in Life Sciences
https://www.readbyqxmd.com/read/28729124/trends-in-antimicrobial-resistance-in-neisseria-gonorrhoeae-and-molecular-characteristics-of-neisseria-gonorrhoeae-with-decreased-susceptibility-to-ceftriaxone-in-shandong-china-2007-to-2014
#8
Lihong Zhao, Aihua Liu, Ruiying Li, Shuping Zhao
In this study, the trends of AMR in N. gonorrhoeae were analyzed in Shandong Province of China during 2007-2014. Moreover, the ceftriaxone genetic resistance determinants including penA, mtrR, penB, ponA, and pilQ genes were sequenced, and the molecular mechanisms of decreased susceptibility or resistance to ceftriaxone in N. gonorrhoeae were elucidated. Overall, the increasing trends of resistance to PEN, TET, and CIP, and decreasing trends of susceptibility to CRO and AZM were observed in Shandong Province of China between 2007 and 2014...
July 17, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28728408/evaluation-of-trace-mineral-source-and-preharvest-deletion-of-trace-minerals-from-finishing-diets-on-tissue-mineral-status-in-pigs
#9
Y L Ma, Merlin D Lindemann, Sharon F Webb, Gregg Rentfrow
Objective: An experiment was conducted to evaluate dietary supplemental trace mineral source and deletion on mineral content in tissues. Methods: Weanling crossbred pigs [n = 144; 72 barrows and 72 gilts; body weight (BW) = 7.4 ± 1.05 kg] were used. A basal diet was prepared, and trace mineral premix containing either inorganic (ITM) or organic (OTM) trace minerals (Cu, Fe, Mn, and Zn) was added to the basal diet. Pigs were blocked by sex and BW and randomly allotted to 24 pens for a total of 6 pigs per pen, and fed a diet containing either ITM or OTM supplemented at the 1998 NRC requirement estimates for each of 5 BW phases (Phase I to V) from 7 to 120 kg...
July 6, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28728397/effects-of-dietary-valine-lysine-ratio-on-the-performance-amino-acid-composition-of-tissues-and-mrna-expression-of-genes-involved-in-branched-chain-amino-acid-metabolism-of-weaned-piglets
#10
Yetong Xu, Xiaokang Ma, Chunli Wang, Mingfeng Yuan, Xiangshu Piao
Objective: The goal of this study was to investigate the effects of dietary standard ileal digestible (SID) valine:lysine ratios on performance, intestinal morphology, amino acids of liver and muscle, plasma indices and mRNA expression of branched-chain amino acid (BCAA) metabolism enzymes. Methods: A total of 144 crossbred pigs (Duroc × Landrace × Large White) weaned at 28 ± 4 days of age (8.79 ± 0.02 kg body weight) were randomly allotted to 1 of 4 diets formulated to provide SID valine: lysine ratios of 50, 60, 70 or 80%...
May 14, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28728389/influence-of-substituting-steam-flaked-corn-for-dry-rolled-corn-on-feedlot-cattle-growth-performance-when-cattle-are-allowed-either-ad-libitum-or-restricted-access-to-the-finishing-diet
#11
Víctor Manuel González-Vizcarra, Alejandro Plascencia, Daniel Ramos-Aviña, Richard Avery Zinn
Objective: The influence of substituting steam-flaked corn (SFC) for dry rolled corn (DRC) on feedlot cattle growth performance and dietary net energy when cattle are allowed either ad libitum or 2-h restricted access to the finishing diet was evaluated. Methods: Treatment effects were tested using 96 crossbred steers (251 ±2 kg) during the initial 56 d of the finishing phase. Cattle were blocked by weight and randomly assigned within blocks to 16 pens (4 pens/treatment)...
June 26, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28728380/effects-of-different-space-allowances-on-growth-performance-blood-profile-and-pork-quality-in-a-grow-to-finish-production-system
#12
J C Jang, X H Jin, J S Hong, Y Y Kim
Objective: This experiment was conducted to evaluate the optimal space allowance on growth performance, blood profile and pork quality of growing-finishing pigs. Methods: A total of ninety crossbred pigs ([Yorkshire x Landrace] x Duroc, 30.25 ± 1.13 kg) were allocated into three treatments (0.96: four pigs / pen, 0.96 m2/pig; 0.80: five pigs / pen, 0.80 m2/pig; 0.69: six pigs / pen, 0.69 m2/pig) in a randomized complete block (RCB) design. Pigs were housed in balanced sex and had free access to feed in all phases for 14 weeks (growing phase I, growing phase II, finishing phase I and finishing phase II)...
June 26, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28728358/tropical-plant-supplementation-effects-on-the-performance-and-parasite-burden-of-goats
#13
Juan Jose Romero, Miguel Augusto Zarate, Ibukun M Ogunade, Kathy G Arriola, Adegbola Tolulope Adesogan
Objective: Examine the effects of supplementing bahiagrass hay (BG) with potentially anthelmintic quantities of hays of perennial peanut (PEA) or sericea lespedeza (LES) or seeds of velvet bean (MUC) or papaya (PAP) on the intake and nutritive value (Experiment 1), and the performance and parasite burden (Experiment 2) of goats. Methods: In experiment 1, 38 male goats (27.4 ± 5.7 kg BW) were randomly assigned to each of 5 treatments: 1) BG alone and BG plus 2) PEA; 3) LES; 4) MUC; and 5) PAP...
June 27, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28728008/pen-on-paper-strategy-for-point-of-care-testing-rapid-prototyping-of-fully-written-microfluidic-biosensor
#14
Zedong Li, Fei Li, Yue Xing, Zhi Liu, Minli You, Yingchun Li, Ting Wen, Zhiguo Qu, Xiao Ling Li, Feng Xu
Paper-based microfluidic biosensors have recently attracted increasing attentions in point-of-care testing (POCT) territories benefiting from their affordable, accessible and eco-friendly features, where technologies for fabricating such biosensors are preferred to be equipment free, easy-to-operate and capable of rapid prototyping. In this work, we developed a pen-on-paper (PoP) strategy based on two custom-made pens, i.e., a wax pen and a conductive-ink pen, to fully write paper-based microfluidic biosensors through directly writing both microfluidic channels and electrodes...
July 1, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28727124/similar-effects-of-lysine-deficiency-in-muscle-biochemical-characteristics-of-fatty-and-lean-piglets
#15
P Palma-Granados, A Haro, I Seiquer, L Lara, J F Aguilera, R Nieto
The main objective of this work was to investigate the effects of feeding Lys-deficient diets on muscle biochemical characteristics, particularly intramuscular fat concentration and fatty acid profile, in a fatty (Iberian) and a conventional pig genotype (Landrace × Large White [LDW]) maintained in identical experimental conditions. Performance and plasma metabolite changes were also monitored. Twenty-eight barrows of 10 kg initial BW, 14 of Iberian and 14 of LDW breed, were randomly assigned to each of 2 experimental diets in a 2 × 2 factorial arrangement (2 breeds × 2 diets)...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727119/nitrogen-from-ammonia-is-as-efficient-as-that-from-free-amino-acids-or-protein-for-improving-growth-performance-of-pigs-fed-diets-deficient-in-nonessential-amino-acid-nitrogen
#16
W D Mansilla, J K Htoo, C F M de Lange
Inclusion of NPN in diets may compensate the deficient supply of nonessential AA (NEAA) in very low CP levels. To assess this, 2 studies were conducted to determine the effect of supplementing NPN and specific NEAA to diets severely deficient in NEAA nitrogen (NEAA-N) on growth performance of pigs. In Exp. 1, 48 gilts (initial BW 15.2 ± 1.3 kg; 2 pigs per pen; 6 pens per treatment) were randomly assigned to 1 of the 4 dietary treatments: 1) positive control (Pos Ctrl), not deficient in essential AA (EAA) and total N, with all N supplied from intact protein (casein and soybean meal) or crystalline EAA, (2) negative control (Neg Ctrl), supplying the same amount of potentially limiting EAA as Pos Ctrl but deficient in NEAA-N, 3) Neg Ctrl plus 1...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727106/increasing-dietary-inclusions-of-camelina-cake-fed-to-pigs-from-weaning-to-slaughter-safety-growth-performance-carcass-traits-and-n-3-enrichment-of-pork
#17
M N Smit, E Beltranena
Feeding cake with remaining oil content not only provides additional dietary energy but may also enrich pork with -3 fatty acids. Limited information is available on feeding camelina cake to pigs relating to feeding safety (toxicity), growth performance, and efficacy of -3 enrichment of pork. Therefore, we evaluated the effects of feeding increasing camelina cake (12.2% crude fat) inclusions in diets for nursery and grower-finisher pigs. In total, 128 pigs (9.2 kg BW) were randomly allocated by sex to 32 nursery pens for 4 wk and were then moved and combined into 16 mixed-sex grower-finisher pens...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727094/effects-of-adding-minimally-refined-cottonseed-oil-or-crude-glycerol-to-diets-containing-40-corn-distiller-s-dried-grains-with-solubles-on-growth-performance-carcass-characteristics-and-pork-fat-firmness-of-growing-finishing-pigs
#18
C C E J Villela, R B Cox, G C Shurson, K M Compart, P E Urriola, L J Johnston
Diets containing more than 20% distiller's dried grains with solubles (DDGS) reduce fat firmness in pork, but supplementation of cottonseed oil or crude glycerol may improve fat firmness. The objective of this study was to assess the effect of feeding minimally refined cottonseed oil or crude glycerol on growth performance, carcass composition, and fat quality of growing-finishing pigs. Mixed sex pigs ( = 216; 24 ± 4 kg initial BW) were blocked by BW and allotted to 1 of 3 dietary treatments: 1) a basal corn-soybean meal diet with 40% DDGS (CON), 2) CON diet plus 5% minimally refined cottonseed oil added throughout the experiment (COT), or 3) CON fed during the first 8 wk and CON + 8% crude glycerol fed during the last 6 wk of the experiment (GLY)...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727093/effects-of-intravenous-lipopolysaccharide-administration-on-feed-intake-ruminal-forage-degradability-and-liquid-parameters-and-physiological-responses-in-beef-cattle
#19
K D Lippolis, R F Cooke, K M Schubach, R S Marques, D W Bohnert
This experiment compared DMI, ruminal forage degradability, and liquid parameters as well as physiological responses in beef cattle receiving a lipopolysaccharide (LPS) challenge or not. Eight ruminally cannulated Angus × Hereford steers (485 ± 16 kg BW) were housed in individual pens on d -7, ranked by BW, and allocated to 1 of 2 treatments administered on d 0: 1) an intravenous (i.v.) bolus dose (0.5 μg/kg of BW, diluted in 5 mL of 0.9% sterile saline) of bacterial LPS ( 0111:B4) or 2) a 5-mL i.v. injection of 0...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727092/effects-of-dried-distiller-s-grains-and-lasalocid-inclusion-on-feedlot-lamb-growth-carcass-traits-nutrient-digestibility-ruminal-fluid-volatile-fatty-acid-concentrations-and-ruminal-hydrogen-sulfide-concentration
#20
A R Crane, R R Redden, K C Swanson, B M Howard, T J Frick, K R Maddock-Carlin, C S Schauer
Our hypothesis was that increasing the inclusion level of dried distiller's grains with solubles (DDGS) to feedlot lambs would increase growth and the inclusion of lasalocid (LAS; Bovatec, Alpharma, LLC, Bridgewater, NJ) would increase ADG and G:F, while not affecting digestibility, ruminal VFA concentration, and ruminal pH. Furthermore, we hypothesized that rations containing LAS and higher levels of DDGS would cause increased ruminal hydrogen sulfide gas (HS) concentrations. Two hundred forty crossbred (Suffolk × Rambouillet) lambs (31...
July 2017: Journal of Animal Science
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