Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 510 for “"high molecular weight"”.
-
Enzymatic Polymerization of High Molecular Weight DNA
… as a directional polyanion that exhibits molecular recognition capabilities. Hence, the efficient and precise synthesis of high molecular weight DNA materials has become key to advance DNA bionanotechnology. Current synthesis methods largely rely on either solid phase chemical synthesis or …
-
High Molecular Weight and Polymer-Bound Antioxidants
… a series of sulphur antioxidants of increasing molecular weight and containing the phenolic moiety have furnished evidence for the importance of both the intrinsic antioxidant activity of the additives as well as those of their physical attributes. The latter include: compatibility, solubility …
-
Microbial degradation of high molecular weight polycyclic aromatic hydrocarbons
The bacterial degradation of high molecular weight PAHs was investigated by isolating communities and individual strains from a PAH-contaminated site. Microbiological analysis of soils from Port Melbourne, Australia, resulted in the enrichment of five microbial communities capable of degrading …
-
Micromechanics of ultra-high molecular weight polyethylene fibre composites
Ultra-high molecular weight polyethylene (UHMWPE) fibre composites are considered to be state-of-the-art materials for penetration and ballistic impact protection applications. The composites are made of strong UHMWPE fibres with a soft compliant matrix. The extreme anisotropy caused by the …
-
Microbial cycling of marine high molecular weight dissolved organic matter
… by linking the microbial food web to higher trophic levels (the microbial loop) and exerts important controls over the cycles of carbon and bioessential elements, such as nitrogen and phosphorus, in the sea. Yet insight into the underlying metabolism and reactions driving the …
-
Elucidating the Ferritin-High Molecular Weight Kininogen Domain 5 Interaction
… as wound healing and tumor growth. It is a highly regulated process, as numerous endogenous angiogenic modulators exist that both positively and negatively control vascularization. When the balance of modulators is altered, pathologic angiogenesis can occur. One such modulator is derived …
-
Orientation of channel die-compressed ultra-high molecular weight polyethylene
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1997.
-
Trends and inferred emissions of atmospheric high molecular weight perfluorocarbons
… emission estimates are presented for the five high molecular weight perfluorocarbons (PFCs): decafluorobutane (C 4 F 1 0 ), dodecafluoropentane (C5 F1 2 ), tetradecafluorohexane (C 6 F14 ), hexadecafluoroheptane (C 7F 16 ) and octadecafluorooctane (C8 F 18 ). Their atmospheric histories are …
-
Microbial cycling of marine high molecular weight dissolved organic matter
… by linking the microbial food web to higher trophic levels (the microbial loop) and exerts important controls over the cycles of carbon and bioessential elements, such as nitrogen and phosphorus, in the sea. Yet insight into the underlying metabolism and reactions driving the …
-
Structural Investigations of High Molecular-Weight Antibiotics and of Epsilon-Nucleosides
Made available in DSpace on 2014-12-10T23:01:59Z (GMT). No. of bitstreams: 1 7500459.pdf: 6777996 bytes, checksum: 78e2ca28003be209e32510fd5bdd2635 (MD5) Previous issue date: 1974
-
Role of High Molecular Weight Hyaluronan in Ultraviolet B Light-Induced Transformation
… new prophylactic agents. Chronic elevation of high molecular weight (HMW) tissue hyaluronan (HA) in skin is linked to tumor resistance in the naked mole rat. To directly assess the role of this polysaccharide in resistance to keratinocyte tumors, a HMW HA phosphatidylethanolamine (HA-PE) …
-
Mechanically Processed Alumina Reinforced Ultra-high Molecular Weight Polyethylene (UHMWPE) Matrix Composites
Alumina particles filled Ultra-high Molecular Weight Polyethylene (UHMWPE), with Al2O3 contents 0, 1, and 2.5 wt% were milled for up to 10 hours by the mechanical alloying (MA) process performed at room temperature to produce composite powders. Compression molding was utilized to produce sheets out …
-
Wear of ultra-high molecular weight polyethylene manufactured with laser powder bed fusion
… knee kinematics. The low melting point of ultra-high molecular weight polyethylene (UHMWPE) and the entanglement of long polymer molecules prevents use of extrusion-based AM techniques such as fused filament fabrication (FFF). Hence, in this work, we use laser-powder bed fusion (L-PBF) to …
-
Cloning of novel low and high molecular weight heat shock genes in wheat
… a vital role in the plant's ability to survive high temperature stress. Cloning low and high molecular weight HSPs from a thermotolerant variety of wheat will provide a building block for later studies of their function. Moreover, once significance of a HSP gene in plant thermotolerance is …
-
Investigation of High Molecular weight adiponectin in HIV -Infected patients on antiretroviral therapy
… aims to investigate the role of multimeric (high molecular weight) adiponectin in the development of metabolic disease resulting from anti-retroviral therapy. Specifically, the aim is to quantify the circulating levels of both total and high molecular weight (HMW) adiponectin and to establish …
-
Methods for increasing the thermal conductivity of ultra-high molecular weight polyethylene (UHMWPE)
… to determine methods for producing ultra-high molecular weight polyethylene with high thermal conductivity by way of polymer chain orientation. The first portion of this report surveys current research involving polyethylene chain orientation and manufacturing. This section includes …
-
Melt Processing Thermally Unstable and High Molecular Weight Polymers with Supercritical Carbon Dioxide
… the 85% AN material should absorb at least 5 weight percent CO₂ for a processing temperature reduction of 26°C in the extrusion process. The second goal of this study is to determine to what extent CO₂ can be used as a processing aid to melt process polyethylenes of higher molecular weight …
-
Tumor-induced immunosuppression: Contribution of a high molecular weight inhibitor and Prostaglandin E2
… reaction (MLR) and mitogen assays. The high mw inhibitory factor was apparently >67 kd, as shown by S-200 Sephacryl chromatography and gel electrophoresis. DEAE-Cellulose chromatography suggested that the pl of the inhibitory factor was < 7.7. lsoelectric focusing revealed that the …
-
Fused Deposition Modeling of Composite Reinforced by Continuous Ultra-High Molecular Weight Polyethylene Fiber
… Modeling (FDM) of composites with compliant high-strength fibers couldexpand opportunities for the design and fabrication of complex compliant structures. However, this area of additive manufacturing (AM) is currently not reported in the open literature. This study pursued developing an …
Page 1 of 26