COSMOGRAIL: XVII. Time delays for the quadruply imaged quasar PG 1115+080

Indexación: Scopus.Acknowledgements. The authors would like to thank R. Gredel for his help in setting up the program at the ESO MPIA 2.2 m telescope, and the anonymous referee for his or her comments on this work. This work is supported by the Swiss National Fundation. This research made use of Astropy, a community-developed core Python package for Astronomy (Astropy Collaboration et al. 2013, 2018) and the 2D graphics environment Matplotlib (Hunter 2007). K.R. acknowledge support from PhD fellowship FIB-UV 2015/2016 and Becas de Doctorado Nacional CONICYT 2017 and thanks the LSSTC Data Science Fellowship Program, her time as a Fellow has benefited this work. M.T. acknowledges support by the DFG grant Hi 1495/2-1. G. C.-F. C. acknowledges support from the Ministry of Education in Taiwan via Government Scholarship to Study Abroad (GSSA). D. C.-Y. Chao and S. H. Suyu gratefully acknowledge the support from the Max Planck Society through the Max Planck Research Group for S. H. Suyu. T. A. acknowledges support by the Ministry for the Economy, Development, and Tourism’s Programa Inicativa Científica Milenio through grant IC 12009, awarded to The Millennium Institute of Astrophysics (MAS).We present time-delay estimates for the quadruply imaged quasar PG 1115+080. Our results are based on almost daily observations for seven months at the ESO MPIA 2.2 m telescope at La Silla Observatory, reaching a signal-to-noise ratio of about 1000 per quasar image. In addition, we re-analyze existing light curves from the literature that we complete with an additional three seasons of monitoring with the Mercator telescope at La Palma Observatory. When exploring the possible source of bias we considered the so-called microlensing time delay, a potential source of systematic error so far never directly accounted for in previous time-delay publications. In 15 yr of data on PG 1115+080, we find no strong evidence of microlensing time delay. Therefore not accounting for this effect, our time-delay estimates on the individual data sets are in good agreement with each other and with the literature. Combining the data sets, we obtain the most precise time-delay estimates to date on PG 1115+080, with Δt(AB) = 8.3+1.5 -1.6 days (18.7% precision), Δt(AC) = 9.9+1.1 -1.1 days (11.1%) and Δt(BC) = 18.8+1.6 -1.6 days (8.5%). Turning these time delays into cosmological constraints is done in a companion paper that makes use of ground-based Adaptive Optics (AO) with the Keck telescope. © ESO 2018.https://www.aanda.org/articles/aa/abs/2018/08/aa33287-18/aa33287-18.htm

Control of assimilate partitioning in crop plants

SIGLEAvailable from British Library Document Supply Centre- DSC:DX88596 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Detection of human blood by immunoassay for applications in forensic analysis

The detection and confirmation of bloodstains as being human in origin is important in crime scene investigations. There are a number of blood detection methods currently available. The aim of this work was to develop an assay capable of detecting the presence of human blood from both liquid blood samples and dried bloodstains. A simple, direct competitive ELISA was developed utilising a polyclonal antibody against human IgG. Once optimised, the ELISA was found to be specific for human IgG, with no cross-reaction observed with pig, sheep, cow, goat, horse and rabbit IgG. The assay was also found to be sensitive, with a detection limit of 0.1 μg/mL. This compares favourably with leading blood detection methods. The assay was able to confirm the presence of human blood in blood mixtures, in stains on a variety of surfaces and also gave positive results with bloodstains that were up to 1 year old. The assay was simple to use, rapid and highly reproducible. The ELISA performance makes it suitable for development as a kit to rival currently used methods for the routine detection of human blood at crime scenes. Further applications of the anti-human IgG antibody are reported, including immunodot assays and a sandwich ELISA format.The methods described here are simple, reliable assays for the identification of human blood and are presented as viable alternatives to existing techniques for blood detection

Les effets d’un entraînement combiné sur les marqueurs du métabolisme osseux chez la femme post-ménopausée

Exercise plays an important role in maximizing and subsequent reduction of the maximum rates of bone loss. The purpose of this study was to determine whether 16 weeks of combined exercise in postmenopausal would affect bone metabolism. Equipment and methods. — Eleven participants (53.1 [±4.0] years) performed combined training that consisted of 60—75% of 1 RM, 2—3 sets of 10—15 repetitions in specific machines and 20—30 min of cardiovascular exercises using an step platform (55—80% FCreserve). Cross-linked N-terminal telopeptides of type I collagen (NTX) was used to analyze bone resorption and serum alkaline phos-phatase (ALP) to analyze bone absorption.info:eu-repo/semantics/publishedVersio

Characterisation and properties of Acacia senegal (L.) Willd. var, senegal with enhanced properties (Acacia (sen) SUPER GUM™): Part 3 Immunological characterisation of Acacia (sen) SUPER GUM™

Four Acacia senegal samples, one control (Mw 6.2×105 g/mol) and three enhanced samples with different molecular weights ranging from 1.2×106–2.5×106 g/mol were fractionated using hydrophobic interaction chromatography (HIC) into two fractions, hydrophilic (fraction 1, yield ∼80%) and hydrophobic (fraction 2, yield ∼2%). The elution profile and weight average molecular weight of fraction 1 were similar to the starting materials but contained slightly more arabinogalactan protein (AGP) component. On the other hand, the AGP peak was almost completely removed from Fraction 2. The Mw for fraction 2 was ∼1.1×105 g/mol and contained <0.5% (of the total injected mass) of aggregated materials with Mw>4.9×107 g/mol. These fractions plus the whole gum were also analysed by ELISA (enzyme linked immunosorbent assay). The results showed that the interaction with an A. senegal specific antibody (SY CC7) is the same for the whole gum sample and its fractions, indicating a common, widely distributed epitope. One sample with the highest molecular weight (2.5×106 g/mol) showed a slightly different interaction, displaying a lower sensitivity, attributed to the formation of a more compact hydrophobic form of AGP. This is in accord also with the observations on the same sample using spectroscopic methods which was attributed to dehydration of the COOH uronic acid group.Examination of the commercially available Acacia(sen) SUPER GUM™ (EM2—Mw ∼1.8×106 g/mol) with three different antibodies (SY CC7, UC-SEN-PS-01 and UC-SEY-PS-01) showed the response to be identical to that of control A. senegal gum. These results demonstrate how immunological techniques, in this instance ELISAs, can be utilised to indicate differences between gum samples and to determine the limit of maturation of Acacia(sen) SUPER GUM™

Detection of irradiated food by immunoassay - development and optimization of an ELISA for dihydrothymidine in irradiated prawns

This article is not available through ChesterRep.This article discribes the development and use of a competitive enzyme-linked immuno-sorbent assay (ELISA) to detect prawns which have been irradiated

TDCOSMO: II. Six new time delays in lensed quasars from high-cadence monitoring at the MPIA 2.2 m telescope

We present six new time-delay measurements obtained from Rc-band monitoring data acquired at the Max Planck Institute for Astrophysics (MPIA) 2.2 m telescope at La Silla observatory between October 2016 and February 2020. The lensed quasars HE 0047−1756, WG 0214−2105, DES 0407−5006, 2M 1134−2103, PSJ 1606−2333, and DES 2325−5229 were observed almost daily at high signal-to-noise ratio to obtain highquality light curves where we can record fast and small-amplitude variations of the quasars. We measured time delays between all pairs of multiple images with only one or two seasons of monitoring with the exception of the time delays relative to image D of PSJ 1606−2333. The most precise estimate was obtained for the delay between image A and image B of DES 0407−5006, where τAB = −128.4 +3.5 −3.8 d (2.8% precision) including systematics due to extrinsic variability in the light curves. For HE 0047−1756, we combined our high-cadence data with measurements from decade-long light curves from previous COSMOGRAIL campaigns, and reach a precision of 0.9 d on the final measurement. The present work demonstrates the feasibility of measuring time delays in lensed quasars in only one or two seasons, provided high signal-to-noise ratio data are obtained at a cadence close to daily

Immunoassays: Their history, development and current place in food science and technology

This article is not available through ChesterRep.This article discusses the types and variety of immunoassays, which are currently available. Immunoassays provide a powerful tool, which can be used in the analysis and quality control of food materials. For both the novice and the experienced worker the specialist terminology of a subject presents an initial barrier, which must be overcome before full understanding is achieved. In this paper an attempt is made to introduce the important terms with which the reader should be familiar and to try to set the various technologies in context. The various basic methods are described and the theoretical and practical basis of more sophisticated assays now being devised are introduced