1,297 research outputs found
Haring (C. H.). The Spanish Empire in America
No full textVerlinden Charles. Haring (C. H.). The Spanish Empire in America. In: Revue belge de philologie et d'histoire, tome 30, fasc. 1-2, 1952. pp. 346-352
Utility of arsenic-treated bird skins for DNA extraction
No full textBackground: Natural history museums receive a rapidly growing number of requests for tissue samples from preserved specimens for DNA-based studies. Traditionally, dried vertebrate specimens were treated with arsenic because of its toxicity and insect-repellent effect. Arsenic has negative effects on in vivo DNA repair enzymes and consequently may inhibit PCR performance. In bird collections, foot pad samples are often requested since the feet were not regularly treated with arsenic and because they are assumed to provide substantial amounts of DNA. However, the actual influence of arsenic on DNA analyses has never been tested. Findings: PCR success of both foot pad and body skin samples was significantly lower in arsenic-treated samples. In general, foot pads performed better than body skin samples. Moreover, PCR success depends on collection date in which younger samples yielded better results. While the addition of arsenic solution to the PCR mixture had a clear negative effect on PCR performance after the threshold of 5.4 μg/μl, such high doses of arsenic are highly unlikely to occur in dried zoological specimens. Conclusions: While lower PCR success in older samples might be due to age effects and/or DNA damage through arsenic treatment, our results show no inhibiting effect on DNA polymerase. We assume that DNA degradation proceeds more rapidly in thin tissue layers with low cell numbers that are susceptible to external abiotic influences. In contrast, in thicker parts of a specimen, such as foot pads, the outermost horny skin may act as an additional barrier. Since foot pads often performed better than body skin samples, the intention to preserve morphologically important structures of a specimen still conflicts with the aim to obtain optimal PCR success. Thus, body skin samples from recently collected specimens should be considered as alternative sources of DNA
Threshold elements and the design of sequential switching networks
No full textIncludes bibliographies."AD 657370."[by] A.K. Susskind, D.R. Haring [and] C.L. Liu
Keith Haring
No full textRadieux : cet adjectif emprunté au motif du « bébé radieux » de Keith Haring synthétise l’impression produite par la découverte de ce catalogue d’exposition. A commencer par sa couverture où chiens aboyant, soucoupes volantes et autres figures sont entourées de traits noirs épais représentant, comme dans les cartoons, le mouvement. Ce rayonnement est lié aux énergies : celles d’un artiste en quête d’intensité pour son art et pour sa vie, celles qu’il capte de l’environnement urbain et de la c..
An Analysis of the Demands for Water from the Private Sector in a Sub-Arctic Urban Area
No full textThis report was prepared by Institute personnel from an incomplete manuscript
left by the author when he terminated his employment at the University of
Alaska in 1967. The Institute feels the report fairly describes the work
reported by Dr. Haring, since no conceptual changes were made in the content.
We feel it to be unfortunate that Dr. Haring refused to cooperate fully with
the final phases of this project.
The report is dated as published, but some worthwhile information is included.
However, because of the Principal Investigator's lack of cooperation, the
Institute is obliged to mention that the contents do not necessarily signify
the organization's views or approval, and that the report is published as a
means of satisfying contractural requirements.Manufacturing and domestic uses of water are very important to local communities
throughout Alaska, although manufacturing typically represents
relatively high levels of consumption in terms of population use equivalents.
This study is concerned principally with the present water use
practices and associated problems in the private sector of the North Star
Borough, Alaska.The work upon which this report is based was supported by funds (Project
B-003-ALAS) provided by the United States Department of the Interior,
Office of Water Resources Research, as authorized under the Water Resources
Act of 1964, as amended
Valentine S. Stoner portrait
No full textDated 1892, this is a cabinet card of Valentine S. Stoner taken by photographer Jacob C. Haring, located at 16 South Erie Street in Massillon, Ohio. Stoner married Jennie Shank on December 29, 1892. The two had one daughter, Mary Melissa Stoner, who was born in 1903
Jennie Shank portrait
No full textDated 1892, this is a cabinet card of Jennie Shank taken by photographer Jacob C. Haring, located at 16 South Erie Street in Massillon, Ohio. Shank married Valentine Stoner, of West Brookfield, Ohio, on December 29, 1892. The two had one daughter, Mary Melissa Stoner, who was born in 1903
USE OF THE HARING CELL FOR MEASURING ADDITION AGENT CONCENTRATION IN ELECTROLYTIC BATHS
No full text Cathode polarization measurements during electrodeposition from acid copper sulphate solutions were made with a Haring cell, using a method previously developed (4). Measurements made at 2°, 24.8°, and 50.1 °C. show that the polarization decreases as temperature increases, this decrease being larger for a temperature change from 2° to 24.8 °C. than for a change from 24.8 to 50.1 °C. An increase in acidity has little effect on the polarization (except for low acidities) at apparent current densities below 2 amp. per dm.2, while it results in an increase in polarization above that value. The increase in polarization caused by various concentrations of gelatin was studied at −4.2°, 2°, 24.8°, and 50.1 °C. For a given gelatin concentration, the increase in polarization is greater the lower the temperature, while for a given temperature, the relative increase in cathode polarization is greater at smaller gelatin concentration. It is concluded that control of the gelatin or glue concentration of an electrolyte with a Haring cell may be considerably improved by making the measurements at low temperatures and in dilute solutions. </jats:p
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