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Creator | Title | Description | Subject | Date |
1 |
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Gesteland, Raymond F. | Cell-free synthesis of herpes simplex virus proteins | Polyribosomes isolated from herpes simplex virus type I (HSV-1)-infected cells have been used to program a eucaryotic cell-free translation system. At least 10 HSV-specific polypeptides, with apparent molecular weights of 25,000 to 160,000, are synthesized by wild-type HSV-infected polyribosomes. Po... | Viral Proteins; Herpes Simplex; Peptide Biosynthesis; Thymidine Kinase | 1977 |
2 |
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Keller, Robert M. | Denotational models for parallel programs with indeterminate operators | Several approaches to networks of concurrently-operating modules involving indeterminacy are discussed. Techniques for representing the denotational semantics of such networks, and for verifying properties of them, are presented, including an oracle approach, an axiomatic approach, a data-type reduc... | Denotational models; Indeterminate operators | 1977 |
3 |
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Armentrout, Peter B. | Endothermic reactions of uranium ions with N2, D2, and CD4 | The assessment of new technology for isotope separation has revived an interest in the spectroscopy, properties, and reactions of uranium and its compounds. Newer methods which have been demonstrated include the use of lasers to selectively excite a particular uranium isotope with subsequent chemic... | Uranium ions; Nitrogen | 1977 |
4 |
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Davidson, Diane W. | Foraging ecology and community organization in desert seed-eating ants | Granivorous ants in the southwestern deserts of the United States are characterized by species-specific colony foraging behaviors that determine their efficiencies at utilizing seeds from different density distributions. Workers search for food either in groups or as individuals, and these feedin... | Ants; Arizona; California; Coexistence; Communities; Density specialization; Desert granivores; Foraging strategies; Insects; New Mexico; Resource partitioning | 1977 |
5 |
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Boll, Steven F. | Improving linear prediction analysis of noisy speech by predictive noise cancellation | The analysis of speech using Linear Prediction is reformulated to account for the presence of acoustically added noise and a technique is presented for reducing its effect on parameter estimation. The method, called Predictive Noise Cancellation (PNC), modifies the noisy speech autocorrelations ... | Linear prediction; Predictive Noise Cancellation; Noisy speech; Sppech analysis | 1977 |
6 |
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Capecchi, Mario R. | Isolation of a suppressible nonsense mutant in mammalian cells | An HGPRT- cell line derived from mouse L cells has been shown to have the following properties: it is CRM'; the defective HGPRT molecules are altered in the carboxyterminal peptide; the mutant cells regain HGPRT activity when ochre-suppressor tRNA is microinjected into them, but not when amber... | HGPRT cell line; HGPRT activity; Ochre nonsense mutation; Mouse L cells; Mammalian cells | 1977 |
7 |
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Ailion, David Charles | New NMR techniques to study diffusion in multispin crystals | We present a new NMR method for studying slow diffusion in multispin systems. With this method we can vary the effect of a particular spin species' motion relative to the others, thus enabling us to separate and identify the component motions. We present a new pulse sequence for measuring T1L', a ge... | NMR; Nuclear magnetic resonance; Crystals; Nuclear-spin species; Diffusion; Molecular rotations | 1977 |
8 |
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Ailion, David Charles | NMR in lithium metal: thermal mixing | We present a calculation of the thermal mixing rate t~ 1 between nuclear Zeeman and dipolar reservoirs in the presence of large rf fields. We applied this calculation to slow-motion diffusion in lithium metal. In particular, we measured the rotating frame spin-lattice relaxation time Tl p as a funct... | NMR; Nuclear magnetic resonance; Lattices; Relaxation time | 1977 |
9 |
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Ailion, David Charles | NMR relaxation study of molecular motions between unequal potential wells in solid trans, trans- muconodinitrile | We report observations of extremely unusual proton NMR relaxation rates in solid trans, transmuconodinitrile (TMD, N=C-CH = CH-CH = CH-C = N). In particular we measured, over the temperature range 77-423 °K, proton dipolar relaxation times Tw and spin lattice relaxation times Tt (at 24 and 58 MH... | NMR; Nuclear magnetic resonance; Lattices; Relaxation time | 1977 |
10 |
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Boll, Steven F. | Noise suppression methods for robust speech processing (1 Oct. 1976 - 31 March 1977) | To develop robust speech processes, based upon the integration of digital noise suppression methods and narrow band speech analysis-synthesis methods, capable of realizing practical, real time methods for effectively processing speech recorded in practical operating environments. | Digital noise suppression | 1977 |
11 |
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Ailion, David Charles | Nuclear double resonance: cross relaxation rates between two spin species | A rotating-frame nuclear-double-resonance experiment is reported in which the cross-relaxation rates between 7Li and 6Li in powdered lithium metal were measured. The theory developed my McArthur, Hahn, and Walstedt (MHW) is applied to these data and good agreement is obtained. We also apply this t... | Nuclear-double-resonance; Lithium; MHW; Cross-relaxation | 1977 |
12 |
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Ailion, David Charles | Nuclear magnetic resonance in LiF: a single nuclear-dipolar-spin temperature in crystals with more than one spin species | In a crystal containing more than one species of nuclear spin in a large dc magnetic field, the secular dipolar interactions between all spins, unlike as well as like, form a single reservoir described by a single spin temperature. We demonstrated this concept with experiments on LiF. In particula... | Spin species; Spin-lattice relaxation; NMR; Nuclear magnetic resonance | 1977 |
13 |
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Seger, Jon | Numerical method for estimating coefficients of relationship in a langur troop | The average coefficient of relationship ( r ij) among the members of a social group is expected to influence the evolution of any trait that affects the average fitness of group members other than the bearer of the trait. It is usually impossible to write a general expression for r ij , because it... | Mating; Reproduction; Trait | 1977 |
14 |
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Miller, Joel Steven | Photoemission of ferrocene, decamethylferrocene, and decamethylferrocene-bis(7,7,8,8-tetracyano-p-quinodimethane) | We present the first vacuum ultraviolet photoemission measurements of condensed ferrocene, decamethylferrocene, and the highly conductive charge transfer complex decamethylferrocene-7,7,8,8-tetracyano-p-quinodimethane, at photon energies from 7.7 to 21.2 eV. We compare the electronic spectra of thes... | Energy; Transfer; TCNQ | 1977 |
15 |
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Davidson, Diane W. | Species diversity and community organization in desert seed-eating ants | Patterns of species diversity and community organization in desert seed-eating ants were studied in 10 habitats on a longitudinal gradient of increasing rainfall extending from southeastern California, through southern Arizona, and into southwestern New Mexico. Local communities of harvester ants... | Ants; Arizona; California; Communities; Competition; Desert Granivores; Diversity; Insects; New Mexico; Novomessor; Pheidole; Pogonomyrmex; Resource allocation; Veromessor. | 1977 |