Results 211 to 220 of about 80,152 (238)

Betaine lipids in chlorarachniophytes [PDF]

Phycological Research, 2010
SUMMARY Evolving from the endosymbiosis of a green algal cell by a filose amoeba or amoeboflagellate, the chimearic chlorarachniophytes combine unique features retained from both of their ancestral units. They have preserved from the endosymbiont only the nucleomorph and chloroplast. Four strains from three genera of this algal class were studied to
Shannon A. Roche, Jeffrey D. Leblond
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Betaine distribution in the Bromeliaceae

Biochemical Systematics and Ecology, 2001
Aerial parts of 38 taxa, distributed in 21 genera and all three subfamilies of the Bromeliaceae have been examined for the presence of betaines. Glycinebetaine and trigonelline were isolated from all the plants studied, although the yields of both compounds were low.
Maricela Adrian-Romero, Maricela Adrian-Romero, Gerald Blunden   +2 more
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Betaine potassium iodide dihydrate: a new compound of betaine

Journal of Physics: Condensed Matter, 1998
Betaine potassium iodide dihydrate, , BKI for short, is a new compound of the aminoacid betaine with a triclinic symmetry and the space group at room temperature. The study of dielectric properties provided evidence for the existence of a structural phase transition occurring around 100 K.
J. Agostinho Moreira, Filipa Pinto, A. Klöpperpieper, Agostinho Almeida, M. R. Chaves   +4 more
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Conductivity processes in deuterated betaine betaine mixed crystals

Journal of Physics: Condensed Matter, 1998
Studies of the electrical conductivity in solid solutions of the mixed crystal system of deuterated antiferroelectric betaine phosphate (DBP) and ferroelectric betaine phosphite (DBPI) were performed. The dc-conductivity in the temperature interval between 280 and 400 K is obtained from measurements of the complex dielectric permittivity at ...
A. Klöpperpieper, J. Banys, J Totz, Dieter Michel   +3 more
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Novel organosilicon betaines

Russian Chemical Bulletin, 1994
The structure of organosilicon betaines R3P+CMe2SiMe2S− (R = Ph and Me2N) was determined by X-ray diffraction analysis.
Borisova, I. V., Zemlyanskii, N. N., Ustynyuk, Yu. A., Khrustalev, V, N,, Lindeman, Sergey, Struchkov, Yu T.   +5 more
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Dielectric and EPR study on betaine phosphate and betaine arsenate

Ferroelectrics, 1989
Abstract Dielectric and EPR study on betaine phosphate (BP) and betaine arsenate (BA) was performed. The E-T phase diagram of BP crystal was proposed from the measurement of the D-E hysteresis loops. EPR measurements revealed the differences of the crystal field between BP and BA crystals near inorganic acid molecules.
N. Ohta, Masaki Maeda, Ikuo Suzuki
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Glycine betaine and glycine betaine analogues in common foods

Food Chemistry, 2003
Abstract In this study we have surveyed the betaine content of a wide range of foods commonly found in the western diet. Glycine betaine, proline betaine (stachydrine), trigonelline and dimethylsulfoniopropionate (DMSP) were the only betaines to be found at ⩾150 μg/g.
F.J. de Zwart, Stephen T. Chambers, Michael Lever, Sandy Slow, Richard J. Payne, Juliet A. Gerrard, Peter M. George   +6 more
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Determination of betaine and free amine in alkyldimethyl betaine by potentiometric titrations [PDF]

Journal of the American Oil Chemists' Society, 1993
Two selective analytical methods are presented for the determination of betaine and free amine contents, respectively, in commercial alkyl dimethyl betaines. Both methods are based on titrations with potentiometric end point detection. The accuracy and precision are discussed.
J. J. Donkerbroek, R. J. Mulder, J. M. Plantinga   +2 more
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Stable Carbenes or Betaines?

European Journal of Organic Chemistry, 2018
The anisotropy effect in 1H NMR spectroscopy can be readily employed to indicate the position of carbene/betaine mesomeric equilibria. NR2 substituted carbene/betaines tend to adopt betaine structures, whereas in the absence of NR2 substituents, the betaine structures cannot stabilise the structure through both π‐donation effects of the NMe2 groups and
Erich Kleinpeter, Andreas Koch
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Chemical exchange and conductivity processes in betaine phosphate and betaine phosphite [PDF]

Journal of Physics: Condensed Matter, 1998
Chemical exchange processes of deuterons in partially deuterated betaine phosphate (DBP) and betaine phosphite (DBPI) crystals are investigated by means of NMR experiments over a wide temperature range. The lineshape analysis of one-dimensional (1D) NMR experiments on DBP reveals a behaviour which is characteristic for exchange processes between all ...
M Arndt, J Totz, P. Freude, Dieter Michel   +3 more
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