Global ETD Search
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Showing 1 to 12 of 12 for “"HBIs"”.
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SOURCES AND STRUCTURES OF COMMONLY OCCURRING HIGHLY BRANCHED ISOPRENOID ALKENES
… The GC-MS characteristics of the four novel C30 HBIs and eight of the novel C25 HBIs characterised herein show an excellent correlation with those of the HBIs commonly reported in sediments and water column particles. In contrast to the HBIs characterised previously, which all possess a saturated …
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Production and preservation of the Arctic sea ice diatom biomarker IP25
… samples were observed for IP25 and some other HBIs, consistent with a sea ice origin, while concentrations of fatty acids and sterols suggested contributions from both sea ice and phytoplankton. A novel analysis of a range of macrofaunal species revealed the presence of IP25 and other HBIs, …
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Factors that Influence the College Choice Process for African American Students
… students. Historically Black institutions (HBIs) confer a disproportionately high number of bachelor's degrees on such students. Of all the bachelor's degrees conferred on African Americans in 1994, over 43% were awarded by predominantly White institutions (PWIs) while HBIs conferred 45.1% …
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An Examination of the Fulfillment of the Goals for Increasing Minority Enrollment and Black Faculty/Administrators Employment in the University of North Carolina, 1980-1999.
… enrollment in historically black institutions (HBIs) and historically white institutions (HWIs) were analyzed for the years 1980, 1988, and 1999.</p><p>The study found that very substantial increases in minority enrollments occurred in all HBIs and HWIs between 1980 and 1988 and, there were …
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Quality of heart rate variability features obtained from ballistocardiograms
Heartbeat intervals (HBIs) vary over time, and that variance can be quantified as heart rate variability (HRV). HRV has several health-related applications including long-term health monitoring and sleep quality assessment. The focus of this research is obtaining HRV from ballistocardiograms …
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A Comparative Examination of Student Satisfaction by Ethnicity at Historically Black and Predominately White Land-Grant Institutions
… attending historically Black institutions (HBIs) seem to be more satisfied with the college environment than their African American counterparts at PWIs, and graduate at rates equal to White students at PWIs (Allen, 1987; Bohr, Pascarella, Nora, & Terenzini, 1995; Love, 1993; Nettles, et …
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Structural Characterisation and the Diagenetic Pathways of C25 Highly Branched Isoprenoid Hydrocarbons
… was not reported however. The concentrations of HBIs often decrease with depth in sediment cores but the reasons for this are unknown.
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Development of biomarker-based proxies for paleo sea-ice reconstructions
… of additional palaeoceanographic developments of HBIs as sea-ice biomarkers in both polar regions has been undertaken. For the Arctic, an investigation into the combined analysis of IP25 and certain phytoplankton biomarkers has been conducted with the aim of providing more detailed and …
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Development of biomarker-based proxy methods for reconstructing the late Quaternary sea ice history in the Barents Sea
… as PIP25), and the availability of multiple HBIs characteristic of ice algal and pelagic production within sedimentary archives. This study investigated the potential of incorporating multiple biomarkers to characterise contrasting sea ice and productivity conditions in the contemporary …
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STRUCTURAL CHARACTERISATION OF HIGHLY BRANCHED ISOPRENOID ALKENES FROM SEDIMENTS AND ALGAE
… with sulphur to form S-containing analogues. HBIs, both as hydrocarbons and S-containing analogues, may prove useful environmental indicators once the sources and exact structures have been established. A study of the temporal variations of HBI and carotenoid biomarker concentrations in Tamar …
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Regulated Recruitment of the Chromosomal Passenger Complex to Chromatin and Microtubules Promotes Accurate Cell Division
… unidentified Haspin basic inhibitory segment (HBIS) downstream of the kinase domain. Upon entry into mitosis, Cdk1- and Polo-dependent multisite phosphorylation of the Haspin N terminus displace the HBIS from the kinase domain, resulting in Haspin activation and H3T3ph during mitosis. We also …
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Reconstruction of recent and palaeo sea ice conditions in the Barents Sea
… to that found between two tri-unsaturated HBIs, consistent with co-production by certain marine phytoplankton. The progressive use of novel HBIs with two or three degrees of unsaturation (e.g. C25:2 and C25:3) could provide further valuable insights into environmental conditions.