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.
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Showing 1 to 20 of 436 for “"Rb"”.
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Myocardial Perfusion Imaging With Rb-82 PET
… with high patient throughput. Rubidium-82 (82Rb) is a PET perfusion imaging agent that has a shot half-life of 76 seconds which enables multiple sequential data acquisitions in a short duration of time. It also reduces the number of false-positive SPECT scans and artifacts from soft tissue …
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Spin-squeezing of ⁸⁷Rb via optical measurement
… 0) hyperfine transition of the 5S1/2 level of ⁸⁷Rb. We also demonstrate a viable setup for the spin-squeezing of the magnetically trappable (F = 2, mF = 1) --> (F = 1, mF = -1) transition, which could potentially be used as a compact frequency standard. This thesis provides a brief theoretical …
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Rb-Sr age determination of the carbonaceous chondrite "Murray"
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1964.
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Spectrochemical analysis of the Moldavites, Ba, Li, Sr, and Rb
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1964.
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Rb-Sr whole rock age in the Imataca Complex, Venezuela.
Massachusetts Institute of Technology. Dept. of Geology and Geophysics. Thesis. 1966. M.S.
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Whole-rock Rb-Sr studies of volcanics and some related granites
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1963.
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Strukturelle Phasenübergänge in TlH 2 PO 4 und Kristallstrukturen von Rb 0.7 Tl 0.3 H 2 PO 4 und Rb 0.5 Tl 0.5 H 2 PO 4
… of the solution, large single crystals of Rb0.5Tl0.5H2PO4, which are proper to the neutron investigations and small single crystals of Rb0.7Tl0.3H2PO4 have been obtained. During the synthesis of TlH2PO4 Tl2HPO4, single crystals could be isolated and their structure was solved (Oh et al., …
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Emergence of Collective Light Scattering in Atomic <sup>87</sup>Rb Samples
… light scattering from a cold atomic sample of 87Rb. Initially prepared in a magneto-optical trap, the atoms are loaded into a far-off-resonance optical dipole trap (FORT) in which the ensemble has a temperature near 100 mK and initial Gaussian radii of approximately 3 mm and 280 mm in the …
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Complex Regulation of Pax6 Neuronal Progenitors By Rb Family Members During Corticogenesis
The retinoblastoma tumor suppressor (pRB) inhibits tumorigenesis by restraining cell cycle progression via repression of the E2F transcription factor family and by promoting cell differentiation via activation of lineage-specific transcription factors. In contrast, the closely related pRB …
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Structural geology, metamorphism, and Rb/Sr geochronology of East Hinnøy, North Norway
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1981.
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Genetic analyses of the Rb and p53 genes in murine development and tumorigenesis
The RB and p53 genes play central roles in cell cycle and checkpoint control, apoptosis and many other biological processes. These are central tumor suppressor genes that are each inactivated in many human cancers. Mouse genetic analyses have been used to dissect roles of these genes in development …
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The roles of Rb, p107, and E2f4 in bone formation and embryonic development
… we analyze the in vivo roles of three proteins, pRb, E2F4, and p107, in murine embryonic development and in differentiation in vitro. As Rb loss causes embryonic lethality due to placental defects, we adopted a conditional knockout strategy to generate Rb-deficient embryos that survive to birth. …
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Simultaneous Targeting of CDK4/6 and BETs is Independent of RB Status in Osteosarcoma
… combination approaches. While functional RB has traditionally been viewed as necessary for CDK4/6i sensitivity, emerging evidence challenges this paradigm and suggests that RB-deficient (RB-) tumors may respond through alternative, RB-independent mechanisms. Bromodomain and extraterminal …
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Sr87/Sr86 ratios, K/Rb ratios, and rare-earth element abundances in pyroxene granulites.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1969.
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Optical and spin coherence properties of Rb atoms in solid neon for magnetic field sensing
… the optical and spin coherence properties of Rb atoms implanted in solid neon. These properties are relevant for using the Rb atoms as quantum sensors of magnetic fields. We demonstrate that the Rb ^2S_1/2 ground spin state can be optically polarized using circularly polarized light and read …
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Rb pathway and chromatin remodeling genes that antagonize let-60 Ras signaling during C. elegans vulval development
… encodes a protein similar to the mammalian pRb tumor suppressor protein. The LIN-35 Rb protein is proposed to act with HDA-1, a histone deacetylase homolog with class B synMuv activity, to remodel chromatin and repress transcription of genes that promote vulval development. To further …
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The Death of the Flying Wing : The Real Reasons Behind the 1949 Cancellation of Northrop Aircraft's RB-49
<p>In an interview aired over the Public Broadcasting System in 1980 , aircraft manufacturer John K. Northrop made a stunning charge. Referring to the Air Force's 1949 cancellation of his Flying Wing aircraft, Mr. Northrop alleged that the cancellation was not the result of any valid concerns about …
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X-ray and neutron scattering studies of the Rb₂MnF₄ and Cu₁âõxMgx̳GeO₃ in an external magnetic field
… The first is a neutron scattering study of Rb2MnF4, a nearly ideal two-dimensional square lattice Heisenberg antiferromagnet with S = 5/2. When this material is placed in a magnetic field on an extrapolation of the spin-flop phase boundary into the paramagnetic phase, Heisenberg critical …
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