نتایج جستجو برای: monoclinic

تعداد نتایج: 3716  

Journal: :Nucleic acids research 1975
G J Quigley N C Seeman A H Wang F L Suddath A Rich

The atomic coordinates of yeast phenylalanine transfer RNA (tRNA) as well as the torsion angles of the polynucleotide chain are presented as derived from an x-ray diffraction analysis of orthorhombic crystals. A comparison is made between the coordinates obtained from analysis of monoclinic crystals of the same material. It is concluded that the molecule has substantially the same form in the o...

2015
Dejan-Krešimir Bučar James A. Elliott Mark D. Eddleston Jeremy K. Cockcroft William Jones

Ultrasound-assisted crystallization (sonocrystallization) was used to prepare a mixture of nanoand micrometer-sized crystals of the monoclinic form of paracetamol − a widely used analgesic known for its particularly problematic mechanical behavior under compression (i.e. poor tabletability). The nanoand microsized crystals yielded a powder which exhibits elastic moduli and bulk cohesions that a...

Journal: :Physical review letters 2012
Zhensheng Tao Tzong-Ru T Han Subhendra D Mahanti Phillip M Duxbury Fei Yuan Chong-Yu Ruan Kevin Wang Junqiao Wu

Using optical, TEM, and ultrafast electron diffraction experiments we find that single crystal VO(2) microbeams gently placed on insulating substrates or metal grids exhibit different behaviors, with structural and metal-insulator transitions occurring at the same temperature for insulating substrates, while for metal substrates a new monoclinic metal phase lies between the insulating monoclini...

1998
Ruiming Li Vaclav Petricek Guangdi Yang Philip Coppens Michael Naughton

(BEDT-TTF)4Hg2.89Br8 (BEDT-TTF ) bisethylene dithiotetrathiofulvalene) is an ambient pressure low-temperature superconductor (Tc ) 4.3K) with an incommensurate two-sublattice structure. It crystallizes in orthorhombic and monoclinic modifications. Only the monoclinic phase becomes superconducting on cooling, as confirmed in this study. Its Hg sublattice undergoes a transition when the temperatu...

Journal: :Optics letters 2009
Alexandr Shumelyuk Serguey Odoulov Gary Cook Dean R Evans

Two-beam coupling gain enhancement is demonstrated for a nontraditional orientation of counterpropagating waves in the monoclinic crystal Sn2P2S6.

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1974
A Klug J D Robertus J E Ladner R S Brown J T Finch

A comparison is made between the electron density maps of the monoclinic and orthorhombic crystal forms of yeast tRNA(Phe) which have been obtained respectively by ourselves and by another group. It is concluded that the molecular structures are essentially the same in both crystals, although the models derived from the maps are not the same. The relation between the two molecular packings is d...

Journal: :Inorganic chemistry 2013
Ying-Ting Wang Chun-Hua Chen

We have successfully and reproducibly synthesized a variety of novel vanadium dioxide (VO2) nanostructures, including metastable monoclinic VO2(B) nanoneedles and nanocorals, orthorhombic VO2(O) nanoparticles, and monoclinic VO2(M) nanofacets by manipulating the aging time of a facile sol-gel approach and the subsequent postannealing conditions. We envision that this previously unreported highl...

2011
HC Vasconcelos MC Barreto

In this study, we tailor the microstructure of hydroxyapatite/zirconia nanocrystalline composites by optimizing processing parameters, namely, introducing an atmosphere of water vapor during sintering in order to control the thermal stability of hydroxyapatite, and a modified sol-gel process that yields to an excellent intergranular distribution of zirconia phase dispersed intergranularly withi...

2016
Vincent Chaptal Arnaud Kilburg David Flot Benjamin Wiseman Nushin Aghajari Jean-Michel Jault Pierre Falson

This data article describes the anisotropy of diffraction observed for the centered monoclinic crystals of OmpF reported in "Two different centered monoclinic crystals of the E. coli outer-membrane protein OmpF originate from the same building block (Chaptal et al., 2016 [1])". The datasets intensity falloff as a function of resolution are provided along with reflections along the (h,l) and (k,...

Journal: :Angewandte Chemie 2015
Dejan-Krešimir Bučar James A Elliott Mark D Eddleston Jeremy K Cockcroft William Jones

Ultrasound-assisted crystallization (sonocrystallization) was used to prepare a mixture of nano- and micrometer-sized crystals of the monoclinic form of paracetamol-a widely used analgesic known for its particularly problematic mechanical behavior under compression (i.e. poor tabletability). The nano- and micrometer-sized crystals yielded a powder which exhibits elastic moduli and bulk cohesion...

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