Browsing University of Hertfordshire by Title
Now showing items 8229-8248 of 24269
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Extraction and characterization of natural cellulosic Erythrina variegata fiber for biocomposites
(2022-05-24)This paper presents a study on extraction and characterization of the cellulose fiber from the bark of Erythrina variegate (EV) plant. Several tests were carried out on Erythrina variegata fibers (EVFs) to determine their ... -
Extraction and Quantitation of RNA
(Wiley-Blackwell, 1992) -
Extraction of metals from contaminated land and industrial solid waste using a novel technology (servo process)
(University of Hertfordshire, 2004)Selective Extraction and Recovery using Volatile Organic compounds is an emerging technology developed during the 1970s. This process can achieve the extraction of heavy metal contaminants from a matrix using a volatile ... -
The extraction of total RNA by the detergent and phenol method
(1984)Successful extraction of RNA depends on the quantitative recovery of pure nucleic acids in an undegraded form. In practice, this means that a selective extraction process is required to remove all the unwanted cellular ... -
Extraction of underlying factors causing construction projects delay in Nigeria
(2021-09-07)Purpose This paper aims to establish the most underlying factors causing construction projects delay from the most applicable. Design/methodology/approach The paper conducted survey of experts using systematic review of ... -
Extragalactic archaeology with the C, N, and O chemical abundances
(2018-02-09)We predict how the C, N, and O abundances within the interstellar medium of galaxies evolve as functions of the galaxy star formation history (SFH). We adopt a hydrodynamical cosmological simulation, focusing on three ... -
Extragalactic Peaked-Spectrum Radio Sources at Low Frequencies
(2017-02-20)We present a sample of 1,483 sources that display spectral peaks between 72 MHz and 1.4 GHz, selected from the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey. The GLEAM survey is the widest ... -
Extragalactic Peaked-Spectrum Radio Sources at Low-Frequencies are Young Radio Galaxies
(2022-12-20)We present a sample of 373 peaked-spectrum (PS) sources with spectral peaks around 150 MHz, selected using a subset of the two LOw Frequency ARray (LOFAR) all-sky surveys, the LOFAR Two Meter Sky Survey and the LOFAR LBA ... -
Extragalactic Radio Sources as a Piece of the Cosmological Jigsaw
(2018-02-26)Early on, extragalactic radio sources have pointed to a cosmologically evolv- ing Universe. They were also an important piece of evidence for the existence of supermassive black holes, now thought to be a key component of ... -
An extragalactic spectroscopic survey of the SSA22 field
(2015-07-01)We present Very Large Telescope VIMOS, Keck DEIMOS and Keck LRIS multi-object spectra of 367 sources in the field of the z ≈ 3.09 protocluster SSA22. Sources are spectroscopically classified via template matching, allowing ... -
Extreme infrared variables from UKIDSS - II. an end-of-survey catalogue of eruptive YSOs and unusual stars
(2017-12-11)We present a catalogue of 618 high-amplitude infrared variable stars (1 < ΔK < 5 mag) detected by the two widely separated epochs of 2.2 μm data in the UKIDSS Galactic plane survey, from searches covering ∼1470 deg2. Most ... -
Extreme infrared variables from UKIDSS-I : A concentration in star-forming regions
(2014-04-01)We present initial results of the first panoramic search for high-amplitude near-infrared variability in theGalactic plane.We analyse the widely separated two-epoch K-band photometry in the fifth and seventh data releases ... -
The extreme phronesis of Percy Cerutty : A narrativized life history of a legendary sports coach
(2017-09-23)This paper presents and interprets a narrativized coaching life history of the Australian athletics coach Percy Cerutty (1895-1975). Through a relational process of self-improvement and practical wisdom sometimes called ... -
Extreme radio flares and associated X-ray variability from young stellar objects in the Orion Nebula Cluster
(2017-07-27)Young stellar objects are known to exhibit strong radio variability on timescales of weeks to months, and a few reports have documented extreme radio flares with at least an order of magnitude change in flux density on ... -
Extreme sensitivity displayed by single-crystal diamond deep ultra-violet photoconductive devices
(2009)Deep UV detection using a single crystal diamond (SCD) substrate without a homoepitaxial layer has been demonstrated using a defect passivation treatment. Despite evidence of surface damage on the SCD, the treatments lead ... -
Extreme star formation in the Milky Way: luminosity distributions of young stellar objects in W49A and W51
(2018-07-01)We have compared the star-formation properties of the W49A and W51 regions by using far-infrared data from the Herschel infrared Galactic Plane Survey (Hi-GAL) and 850-μm observations from the James Clerk Maxwell Telescope ...