Refinement of a non-centrosymmetrical structure: sodium nitrite
نویسندگان
چکیده
منابع مشابه
Temperature evolution of sodium nitrite structure in a restricted geometry.
The NaNO2 nanocomposite ferroelectric material in porous glass was studied by neutron diffraction. For the first time, the details of the crystal structure including positions and anisotropic thermal parameters were determined for the solid material, embedded in a porous matrix, in ferro- and paraelectric phases. It is demonstrated that in the ferroelectric phase the structure is consistent wit...
متن کاملReproductive toxicology. Sodium nitrite.
Phylogenetic and geographic evidence suggest that many parthenogenetic organisms have evolved recently and have spread rapidly. These patterns play a critical role in our understanding of the relative merits of sexual versus asexual reproductive modes, yet their interpretation is often hampered by a lack of detail. Here we present a detailed phylogeographic study of a vertebrate parthenogen, th...
متن کاملUse of non-crystallographic symmetry in protein structure refinement.
Several methods to assess the (dis)similarity of protein structures objectively are described, some of which, when applied to non-crystallographically related protein models, are able to discriminate between significant differences and 'random noise'. Some of these methods have been used to investigate a sample of several hundred protein structures which have been solved by means of X-ray cryst...
متن کاملPorous glasses with sodium nitrite impregnations
The properties of sodium nitrite introduced in porous glasses have been investigated. SEM graphs indicate existence of sodium nitrite inside glass pores. It has been shown that FTIR and Raman spectra are similar for bulk sodium nitrite and sodium nitrite embedded into porous glass. The nature of FTIR and Raman bands has been determined. The size-effect of sodium nitride introduced into porous g...
متن کاملSevere Methemoglobinemia due to Sodium Nitrite Poisoning
Case. We report a case of severe methemoglobinemia due to sodium nitrite poisoning. A 28-year-old man was brought to our emergency department because of transient loss of consciousness and cyanosis. He was immediately intubated and ventilated with 100% oxygen. A blood test revealed a methemoglobin level of 92.5%. Outcome. We treated the patient with gastric lavage, activated charcoal, and methy...
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ژورنال
عنوان ژورنال: Acta Crystallographica
سال: 1954
ISSN: 0365-110X
DOI: 10.1107/s0365110x54000138