Limpar
1.787.646 resultados

Acesso aberto

Tipo do recurso

Tipo de base de dados

Ano de criação

Produção nacional

Revisado por pares

Áreas

Idioma

Editores

Artigo

T.B. Grimley,

... transfer of an ion from the interior of the crystal to its hydrated state in solution is zero. ... be balanced by an opposite charge carried by the crystal in the form of ions adsorbed to the surface. If, however, lattice defects are present in the crystal in thermal equilibrium, the balancing charge may reside actually inside the crystal in the form of a space charge of ... the interface and falls exponentially to zero inside the crystal; only at the isoelectric point where the two ... uncharged are the concentrations of defects uniform throughout the crystal. In any other electrolyte the equations governing the ...

Tópico(s): Microfluidic and Bio-sensing Technologies

1950 - Royal Society | Proceedings of the Royal Society of London A Mathematical and Physical Sciences

Livro

National Bureau of Economic Research (NBER)

Jornais Acesso aberto

George Dawson, Wm. Blair, Geo. Dawson, Alfred H. Wall,

... Essay: Notes of Experiments, On the Formation of Crystals, The Dry Collodion Process, A Suggestive Experiment, Gossip, A ...

1867 - Gale Group | NCCO Photography

Artigo Revisado por pares

Robert A. Robinson,

... width by 100 Angström units in thickness. 2. The crystals have a size range which they do not ... units in length to about 20 Angström units ±. The crystals are tabular in form, and in mature cortical bone some of the crystals have a regular hexagonal outline. 3. The crystals in newly formed and mature bone have the same general size and tabular form. 4. The crystals lie in the cement substance and not in ... comes in contact with hyaluronidase. 8. Some of the crystals and cement substance closely ensheathe the collagen fibers. ...

Tópico(s): Bone health and treatments

1952 - Wolters Kluwer | Journal of Bone and Joint Surgery

Jornais Acesso aberto

M.P., A TRAVELLER., E. W. B., JOHN DIXON., C. E. DEKKER., ROBERT SPENCER ROBINSON., HENRY COXWELL.,

... TIN TRADE.-The standards were raised 3s., Demerara Crystals., The Restoration Of Stonehenge.-The Salis-, The International Geographical ...

1881 - Gale Group | TDA

Artigo

Kathleen Lonsdale, K. S. KRISHNAN,

... both layer lattice structures, and hexamethylene tetramine in the crystal of which the molecule itself possesses high symmetry. ... indicate the approximate orientation of the molecules in the crystals are therefore greatly to be welcomed. Krishnan and ... knowledge of the optical and diamagnetic anisotrophy of the crystal may, in favourable cases, give very direct information ... out also that, given the diamagnetic anisotrophy of the crystal and the accurate orientation of the molecules in the crystal, the principal diamagnetic susceptibilities of a single molecule ...

Tópico(s): Inorganic and Organometallic Chemistry

1936 - Royal Society | Proceedings of the Royal Society of London A Mathematical and Physical Sciences

Artigo

A. G. Chynoweth,

... times have been studied as a function of the crystal thickness and the applied field strength. The pulse ... ensuremath{\mu}sec. The pulse heights increase with the crystal thickness and linearly with the applied field while ... C. The relaxation time is essentially independent of the crystal thickness, of the applied field, and of the ... the pulses is less than one percent of the crystal volume between the electrodes. Individual pulses occur quite ... by a Barkhausen pulse are mainly determined by the crystal thickness and the condition that the depolarizing field ...

Tópico(s): Acoustic Wave Resonator Technologies

1958 - American Institute of Physics | Physical Review

Livro

Springer Link

Jornais Acesso aberto

C. H. Claudy, Winn W. Davidson, H. T. Middleton, J. H. Brand, Elmer Roberson,

... Philadelphia. Only One …, Masking with Paper, Photographing Snow Crystals, The Causes of Fogged Films, Question and Answers, The ...

1920 - Gale Group | NCCO Photography

Artigo Acesso aberto

C. J. Davisson, L. H. Germer,

... has been measured as a function of direction. The crystal is cut parallel to a set of its { ... six sharply defined beams of electrons issue from the crystal in its principal azimuths. Thirty such sets of ... by adsorbed gas; they are not found when the crystal is thoroughly degassed. Of the twenty-four sets ... sets of Laue beams that would issue from the crystal within the range of observation if the incident ... these beams in position, but occur as if the crystal were contracted normally to its surface. The spacing ...

Tópico(s): Particle accelerators and beam dynamics

1927 - American Institute of Physics | Physical Review

Artigo Acesso aberto

A. B. Bhatia, K. S. KRISHNAN,

... scattering—of these electrons in their passage through the crystal, by the thermally agitated atoms. Hence a detailed knowledge of the scattering coefficient of the crystal for the Fermi electrons, incident and scattered along different directions in the crystal, will enable us to calculate τ or l . ... factors with ɸ .) 2. The structure factor of the crystal, which, besides being a function of λ , will ... different directions of incidence and of scattering in the crystals.) Using these data for the atom form factor ...

Tópico(s): Advanced Physical and Chemical Molecular Interactions

1948 - Royal Society | Proceedings of the Royal Society of London A Mathematical and Physical Sciences

Jornais Acesso aberto

H.R. Grenfell, Arde,

... By Government In India Brazilian Railway Guarantees Demerara Crystals The Farmers' Alliance And Fair Trade Egypt And The ...

1881 - Gale Group | The Economist

Artigo

Lanying Lin,

... room temperature in air and in helium atmospheres. The crystals were placed in a thermostatted enclosure regulated to ... 0.01\ifmmode^\circ\else\textdegree\fi{}C. The crystals were about 2\textonequarter{} in. from the x- ... change in length of the largest dimension of the crystal was measured during and after the irradiation by ... the relation between the relative linear expansion of the crystal and the optically determined average concentration of $F$- ... 12}$, where $d$ is the lattice constant of the crystal. There was a time delay of about 20- ...

Tópico(s): Terahertz technology and applications

1956 - American Institute of Physics | Physical Review

Livro

Project Gutenberg

Artigo Revisado por pares

Edward Tyson Reichert, A. P. Brown,

... prominently. 1. The constancy of generic characters in the crystals.—For instance, the genera that have been represented ... in each case constancy in the characters of the crystals in each genus, with marked differences both in axial ratios and in crystal systems between the crystals from the different genera. When the characters of the crystals from any one of these genera are tabulated, ... to the mineralogist the crystallographic groups of minerals. The crystals of the genus Felis are as strictly isomorphous ...

Tópico(s): Enzyme Structure and Function

1908 - SAGE Publishing | Experimental Biology and Medicine

Jornais Acesso aberto

Thomas Bedding, F. M. Steadman, Harold Baker, J. T. Pigg, Alexander MacKie, Arthur R. Hinks, Catharine Weed Ward, Tempora Mutantur,

... 29, Wimbledon and District Camera Club, Adulterated Soda Crystals, The Longton and District Photographic Society, Composite Photography, Unal ...

1903 - Gale Group | NCCO Photography

Artigo

R. C. Davis, P. R. Bell, G.G. Kelley, N. H. Lazar,

... in the bevelled end to the center of the crystal. Three 5-inch diameter Dumont 6364's were optically connected directly to the flat end of the crystal. Sources were placed inside the crystal and γ spectra obtained, taking advantage of full ... 1/4 inch hole drilled to the center. The crystal is optically connected to a Dumont 6364. The crystal is placed inside a 28-inch tank of ... pulses in the liquid. Samples are placed inside the crystal and the pulses from the crystal and liquid scintillator are placed in anticoincidence to ...

Tópico(s): Radiation Effects and Dosimetry

1956 - Institute of Electrical and Electronics Engineers | IRE Transactions on Nuclear Science

Artigo Acesso aberto

JOY BOYES-WATSON, Ernest R. Davidson, M. F. Perutz,

... information on the arrangement of the molecules in the crystal, their shape and dimensions, and certain features of ... varied by allowing heavy ions to diffuse into the crystals. This increases the scattering contribution of the liquid ... crystallization was varied by swelling and shrinkage of the crystals. This involves stepwise, reversible transitions between different well- ... each being stable in a particular environment of the crystal. The lattice changes were utilized in two different ... A and a diameter of 57 A. In the crystal these cylinders form close-packed layers which alternate ...

Tópico(s): Porphyrin Metabolism and Disorders

1947 - Royal Society | Proceedings of the Royal Society of London A Mathematical and Physical Sciences