514 research outputs found
Location of the acupoints Hegu (L14)–Yuji (LU10) and Zusanli (ST36)–Chengshan (BL57).
No full text<p>Location of the acupoints Hegu (L14)–Yuji (LU10) and Zusanli (ST36)–Chengshan (BL57).</p
Correlation of Early Cretaceous radiolarian assemblages from southern Tibet and central Italy
No full textComparison of radiolarian assemblages from marls in the Gorgo a Cerbara section in the Umbria–Marche Basin in central Italy and a siliceous sequence (BB1 section) near Babazhadong in southern Tibet indicates similar faunas comparable to those in the Aurisaturnalis carinatus zone and Turbocapsula costata zone. Several significant species, Archaeodictyomitra lacrimula (Foreman), A. excellens (Tan Sin Hok), Dictyomitra communis (Squinabol), and Aurisaturnalis carinatus perforatus Dumitrica and Dumitrica-Jud, which are common in older strata, make their last occurrences near the base of the Turbocapsula costata zone in these two areas. Comparison with the Gorgo a Cerbara section provides an accurate age constraint for the siliceous succession in southern Tibet, which contains no fossils other than radiolarians. The comparison indicates a close connection between the western and eastern Tethys during the Barremian to early Aptian. The correlation testifies that the radiolarian zonation in southern Tibet is applicable for the whole Tethys. The siliceous succession in BB1 section encompasses the early Aptian Oceanic Anoxic Event 1a (OAE 1a). The early Aptian OAE 1a is located in the upper part of the Aurisaturnalis carinatus perforatus subzone. The first occurrence biohorizon of the genus Turbocapsula and the evolutionary first appearance biohorizon of T. costata costata (Wu) are useful markers for constraining the OAE 1a in the Tethys
Multi-stage tectono-magmatic events of the Eastern Kunlun Range, northern Tibet: insights from U-Pb geochronology and (U-Th)/He thermochronology
No full textAbstract not availableJingen Dai, Chengshan Wang, Jeremy Hourigan, M. Santos
Rapid forearc spreading between 130 and 120Ma: evidence from geochronology and geochemistry of the Xigaze ophiolite, southern Tibet
No full textAbstract not availableJingen Dai, Chengshan Wang, Ali Polat, M. Santosh, Yalin Li, Yukui G
Data for: The evolution of terrestrial latitudinal temperature gradient from the latest Cretaceous through the Present
No full textThe global marine/terrestrial temperature data from different proxies were collected for the latest Cretaceous (~72-66 Ma), Late Paleocene-Early Eocene (~60-48 Ma), Early Oligocene (~34-28 Ma), and Pliocene (5.3-2.6 Ma). The terrestrial proxies include plant fossils, membrane lipids from soils (MBT/CBT), δ18O of tooth enamel, and clumped isotopes (Δ47) of inorganic and organic carbonates. The marine proxies include membrane lipids of marine sediments (TEX86), UK’37, the Mg/Ca of planktonic foraminifera, clumped isotopes (Δ47) of shell carbonates, and the δ18O of diverse fossils, including fish tooth enamel (phosphate), mollusk shells and fish otoliths (aragonite), exceptionally well-preserved planktonic foraminifera (calcite), and well-preserved rudists and other mollusks (calcite)
Initial report of continental scientific drilling project of the Cretaceous Songliao Basin (SK-1) in China /
No full textIncludes bibliographical references and index.Print version record.Elsevie
ANALYSIS OF VOLATILE ORGANIC COMPOUNDS IN AIR SAMPLES BY INFRARED SPECTROSCOPIC ANALYSIS OF SORBENT TUBE SAMPLES
No full textVolatile organic compounds (VOCs) have typically been analyzed using gas chromatography/mass spectrometry (GC/MS), which offers low detection limits and high specificity in identifying compound structures. FTIR has the advantage of high speed, internally calibrated, and sensitive for analyte detection down to parts-per-billion levels. FTIR can also analyze multiple components simultaneously by spectral deconvolution. Preconcentration with a sorbent tube is prescribed by the EPA method and offers a better option for environmental samples because the concentrations of analytes tend to be significantly lower in the ambient air than industrial emission sources. The research goal of this project is to develop a method for analyzing low molecular weight VOCs with the use of sorbent tube technology in conjunction with a Varian 7000 FTIR. For future work, the technology developed through this research can be combined with remotely controlled sampling modes to facilitate airborne sampling at high altitudes or near industrial emission stacks.M.S
SYNTHESIS, PURIFICATION, SOLUBILITY, AND RAMAN SPECTROSCOPY STUDY OF VARIOUS SEGMENTS OF THE PROTEIN α-SYNUCLEIN’S NONAMYLOID-BETA COMPONENT REGION
No full textParkinson’s Disease is a neurodegenerative brain disorder that occurs when dopamine producing neurons, in the mid-region of the brain known as the substantia nigra, stop working or die. The degenerating dopaminergic neurons develop a hallmark deposition of Lewy bodies comprised mostly of a 140 amino acid residue protein known as α-synuclein. The primary structure of α-synuclein consists of three components: 1) the N-terminus domain (amino acid residues 1-60), which contains a positively charged lysine residue; 2) the hydrophobic domain (residues 61-95), which is the central part of the protein, and is known as the nonamyloid-beta component (NAC); 3) the C-terminus domain (residues 96-140), which is negatively charged and rich in acidic residues.
It has been determined that the NAC is hydrophobic and known to be the source of aggregation within α-synuclein that causes Parkinson’s Disease. Previously published results from our lab determined that the NAC shares similar biophysical behavior to that of the whole protein of α-synuclein. On the other hand, it was very insoluble and had weak Raman spectroscopic peaks. For this thesis, the goal was to try to improve the solubility of the NAC region by synthesizing shorter and longer length nonamyloid-beta component (NAC) regions of α-synuclein, observe which are more soluble in water, and analyze each pure peptide using Raman spectroscopy in order to determine if any displayed stronger signals than that of the NAC. It was concluded that all studied variations of the NAC had much greater solubility, but α-synuclein (57-102) had substantially improved Raman spectra signals.M.S
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