Relation between Portland cement carbonation, range of clinker burning and some expansive phenomena in the autoclave test
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Materials Literature
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Use of «Melment» in plants making prefabricated units
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Cement, concrete, construction and quality discussed by lETCC scientists in Venezuela and the Dominican Republic
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Extracts from technical journals
Silicon gel as puzzolane standard: its energetic activity and limitations.
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Charcoal briquettes as substitute of blas furnace coal. I - Compound carbón bodies
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46—THE GEOMETRY, DIMENSIONAL PROPERTIES, AND STABILIZATION OF THE COTTON PLAIN-JERSEY STRUCTURE
Dimensional stability in cotton plain-jersey fabrics can be attained by either mechanical-relaxation techniques (consecutive laundering and tumble-drying cycles) or chemical treatments (fabric mercerization without tension). Both treatments cause large linear-dimensional changes (shrinkage) leading to the same final s…
Pyran copolymer as an effective adjuvant to chemotherapy against a murine leukemia and solid tumor.
Pyran (divinyl ether-maleic anhydride) copolymer (NSC 46015) is a polyanion with interferon-inducing and macrophage-stimulating properties, and therefore it has been studied as a possible antitumor agent. Extensive studies using pyran as an adjuvant to chemotherapy against the LSTRA murine leukemia and the Lewis lung…
Electron Scattering and Nuclear Structure
Following a major shortage of 99Mo in the 2009–2010 period, concern grew that the aging reactor production facilities needed to be replaced. Most producers were using highly enriched 235U (HEU) as the target material. The Organisation for Economic Co-...Read More
Ferromagnetic and antiferromagnetic semiconductors
A review is given of the experimental and theoretical data on ferromagnetic and antiferromagnetic semiconductors. Information on the magnetic, electrical, and optical properties is analyzed systematically. The main theoretical ideas on the physics of magnetic semiconductors are given without detailed proof and are use…
Experimental investigations of cavitation-bubble collapse in the neighbourhood of a solid boundary
Cavitation bubbles were produced by focusing giant pulses of a Q -switched ruby laser into distilled water. The dynamics of the bubbles in the neighbourhood of a solid boundary were studied by means of high-speed photography using a rotating-mirror camera with framing rates of up to 300000 frame/s. Bubble motion was e…
Melting of Colloidal Crystals
Inelastic light scattering is used to study the dynamics of an ordered suspension of macromolecules.Received 4 August 1975DOI:https://doi.org/10.1103/PhysRevLett.35.1448©1975 American Physical Society
Neutron-scattering studies on beta-alumina
The elastic constants (in units of 10 11 dyn cm -2 ) of Na beta -alumina as measured by inelastic neutron scattering are c 11 =33.8, c 33 =24.5, c 44 =5.0 and c 12 =14.3, c 44 varies with the substitution of other ions for Na, with c 44 =5.6, 6.2 and 7.3 for Ag, K and Rb respectively. A dispersionless phonon mode obse…
Optical spectrum of Cr3+in the spinel LiGa5O8
The optical absorption and luminescence spectra of chromium ions in the LiGa 5 O 8 spinel are investigated. Measurements are made in the temperature range 1.6-300K. The absorption spectra consist of broad (split into three) spin-allowed bands connected with the transitions 4 A 2 to 4 T 2 and 4 A 2 to a 4 T 1 , and sha…
epsilon -expansion analysis of some physically realizable n⩾4 vector models
Four different n>or=4 component Hamiltonians describing phase transitions in certain physical systems are derived. The corresponding critical behaviour is studied using the exact renormalization group in d=4- epsilon dimensions. In particular, although TbD 2 , Nd and K 2 IrCl 6 have different symmetries, their critica…
Molecular mobility and structure of elastin deduced from the solvent and temperature dependence of carbon-13 magnetic resonance relaxation data
13C relaxation parameters, T1, line width, and NOE, have been determined for backbone carbons of ligamentum nuchae elastin swollen by 0.15 M NaCl, 0.15 M NaCl-formamide, 0.15 M NaCl-ethanol, dimethyl sulfoxide, and formamide. The data have been analyzed in terms of (a) a single correlation time model and (b) a model e…
Modification of arginine and lysine in proteins with 2,4-pentanedione
Primary amines react with 2,4-pentanedione at pH 6-9 to form enamines, N-alkyl-4-amino-3-penten-2-ones. The latter compounds readily regenerate the primary amine at low pH or on treatment with hydroxylamine. Guanidine and substituted guanidines react with 2,4-pentanedione to form N-substituted 2-amino-4,6-dimethylpyri…
Two-Photon Decay of the 6.05-MeV State ofO16
A triple-coincidence, five-parameter technique was employed to search for two-photon emission in the decay of the $^{16}\mathrm{O}$(6.05-MeV) state. Data were event-recorded and analyzed in parallel with events associated with decay of the $^{16}\mathrm{O}$(6.13-MeV) and the $^{16}\mathrm{O}$(7.12-MeV) states. Our mea…
Effect of „Forest” Dislocations in the {1122} 〈1123〉 system on hardening in Mg single crystals under basal slip
Experimental results are given of the dependence of work hardening parameters (critical shear stress, τc, work hardening coefficient, θA, and stage length ϵA at easy glide) in Mg crystals under basal slip on the density of pyramidal dislocations ϱf of various kinds. A relation between the kind of basal–pyramidal dislo…
Formation of vacancy-type dislocation loops in tungsten bombarded by 60 keV Au ions
The formation of vacancy-type dislocation loops in tungsten specimens as produced by irradiation with 60 keV Au ions is investigated by transmission electron microscopy. The majority of the loops is found to have Burgers vectors b=1/2〈111〉 and loop planes normal to n ≈︁ {110} (∢(b, n) ≈︁ 35°). The 12 different loop or…