نتایج جستجو برای: borates

تعداد نتایج: 1744  

2017
Xuemiao Yin Yaxing Wang Xiaojing Bai Yumin Wang Lanhua Chen Chengliang Xiao Juan Diwu Shiyu Du Zhifang Chai Thomas E. Albrecht-Schmitt Shuao Wang

Lanthanides possess similar chemical properties rendering their separation from one another a challenge of fundamental chemical and global importance given their incorporation into many advanced technologies. New separation strategies combining green chemistry with low cost and high efficiency remain highly desirable. We demonstrate that the subtle bonding differences among trivalent lanthanide...

Journal: :Journal of forensic sciences 2007
Rebecca A Hamilton Barbara C Wolf

Borate-containing compounds were formerly used as topical antiseptics and were components of many medicinal preparations including skin powders and ointments used for the treatment of burns and diaper rash. These compounds were also used as irrigants for body cavities, including the pleural, vaginal, and rectal cavities. These applications were subsequently discontinued by the medical community...

2001
c. Connor Chang A. Pines

We report the application of our dc SQUID (superconducting quantum interference device) spectrometer [C. Connor, J. Chang, and A. Pines, Rev. Sci. Instrum. 61, 1059( 1990)] to nuclear quadrupole resonance (NQR) studies of aluminum-27, and boron-II in crystalline and glassy solids. Our results give eqQ /h = 2.38 MHz and 1] = 0.0 for a-A120 3 at 4.2 K. For the natural mineral petalite (LiAISi4 01...

2015
M. N. Popova K. N. Boldyrev

High-resolution far-infrared reflection and polarized ellipsometry, as well as Raman scattering temperature-dependent measurements are used to study spin-phonon and electron-phonon interactions in rare-earth (RE) iron borates with the R32 structure of a natural mineral huntite, namely, in RFe3(BO3)4 with R1⁄4Pr, Nd, and Sm. Pronounced peculiarities in the ω(T) dependences at the Néel temperatur...

2014
Ioannis Tiritiris Stefan Saur Willi Kantlehner

In the cation of the title salt, C4H8NO(+)·C24H20B(-), the C-N bond lengths are 1.272 (2), 1.4557 (19) and 1.4638 (19) Å, indicating double- and single-bond character, respectively. The C-O bond length of 1.3098 (19) Å shows that double-bond character and charge delocalization occurs within the NCO plane of the cation. In the crystal, a C-H⋯π inter-action is present between the methyl-ene H ato...

Journal: :Journal of chromatographic science 2012
Sevgi Tatar Ulu Zeynep Aydoğmuş

A new high-performance liquid chromatographic method is described for the determination of bisoprolol in human plasma. The proposed method was based on the derivatization of bisoprolol with 4-chloro-7-nitro-2,1,3-benzoxadiazole in borate buffer at pH 9.5 to yield a fluorescent product. Chromatographic separation of bisoprolol was achieved by using isocratic elution at a flow rate of 1.2 mL/min ...

Journal: :Journal of The Electrochemical Society 2022

An electrolyte consisting of lithium nitrate (LiNO 3 ) and difluoro(oxalato)borate (LiDFOB) in ethylene carbonate (EC), ethylmethyl (EMC), triethyl phosphate (TEP) is used to improve the long-term cycling stability silicon anodes. TEP was selected for its ability dissolve LiNO carbonates a concentration ∼0.2 M. The large amount combined with LiDFOB salt leads capacity retention 87.1% after one ...

2010
Marie-France Thévenon Gianluca Tondi Antonio Pizzi

Boron compounds are used as wood preservatives as they are both fungicide and insecticide, relatively inexpensive and environmentally acceptable. Nevertheless, in the field of wood protection, borates are only used for indoor non-exposed applications or in association with other biocides, due to their main disadvantage of being readily leachable from treated wood. To overcome this problem, bori...

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