DL/I
I. Polarographic determination of alpha-methyl-DL-cystine II. Synthesis of alpha substituted amino acids.
... ► Because of a recent synthesis of a substituted amino ad d, a-methyl-Di- cystine, it became necessary to have a method of determining this com pound. The polarographic determina tion of the substance in 0.1 N hydro ...
88
Compositional and in vitro evaluation of nonwoven type I collagen /poly-DL-lactic acid scaffolds for bone regeneration
... Incorporating high molecular weight PDLLA polymer with type I collagen followed by GD crosslinking produced water stable electrospun fibrous scaffolds. A PDLLA/collagen scaffold composition of 60/40 (w/w) was ...
20
DL Histidine DL tartrate
... This study was undertaken to identify the effects of chirality on the formation of salts, speci®cally the way chirality may affect hydration, as a result of interactions between a chiral drug and a chiral counter-ion. ...
6
DL Phenylalaninium nitrate
... The phenylalaninium residue forms a strong O—H···O hydrogen bond with the nitrate anion. The amino nitrogen of the phenylalaninium residue forms an N—H···O hydrogen bond with oxygen atoms of the nitrate anion and the ...
9
DL Methioninium maleate
... Fig. 2 shows the packing of molecules of (I), viewed down the b axis. The methioninium and semi-maleate ions aggregate in alternate columns parallel to the a axis. There are no direct hydrogen-bonded interactions ...
7
DL Alaninium oxalate
... In the crystal structure of (I), the alanine molecules dimerize across inversion centres through head-to-tail N - H···O hydrogen bonds, as observed in many other amino acid racemates (Soman & Vijayan, 1989). ...
8
DL Valinium perchlorate
... The asymmetric unit contains four crystallographically independent valinium residues (I, II, III and IV) and four independent perchlorate anions (1, 2, 3 and 4). The ClÐO bond distances and OÐClÐO bond angles show ...
12
DL Threoninium trichloroacetate
... Fig. 2 shows the packing of the molecules of (I), viewed down the a axis. The threoninium cations and trichloroacetate anions are linked together by an in®nite network of hydrogen bonds. Atoms O3A and O3B ...
9
DL Phenylalaninium trichloroacetate
... Fig. 2 shows the packing of ions inf (I), viewed along the c axis. It is clearly seen that the aggregation of phenylalaninium cations and trichloroacetate anions form columns along the c axis. These columns have ...
7
DL Valinium nitrate
... Anions I and II are related to III and IV, respectively, by a pseudo-c-glide with a mirror plane at y = ...Anions I and III are related to II and IV, respectively, by a pseudo-trans- lation of half the unit ...
11
DL Threoninium dihydrogen phosphate
... Threonine is an essential amino acid, which helps in main- taining the proper balance of protein in the body. It is found in the heart, skeletal muscles and also in the central nervous system. The crystal structures of ...
7
Bis(DL methioninium) sulfate
... of dl-methionine (Mathieson, 1952), L-methionine (Torii & Iitaka, 1973), dl-methionine hydrochloride (Di Blasio et ...1977), dl-methionine nitrate (Mostad & Natar- ajan, 1985) and ...
11
DL Phenylalaninium dihydrogen phosphate
... The title compound, (I), crystallizes in an unusual, but not uncommon, non-centrosymmetric space group, Pc. However, racemates with more than one molecule in the asymmetric unit are found to grow in ...
12
DL Valinium dihydrogen phosphate
... The valine molecule can have three possible rotational isomers, viz. gauche I, trans and gauche II (Torii & Iitaka, 1970). In the present case, the valinium residue adopts a gauche II conformation (Table ...
7
N Phthaloyl DL alanine
... The title compound, (I), was prepared by reaction of phthalic anhy- dride with dl-alanine using a previously reported procedure (Taber & Malcolm, 2001). Suitable crystals were obtained by slow ...
6
Bis(DL methioninium) sulfate
... The side-chain conformation angle for the major disorder component of the methioninium cation is trans-trans-gauche II, while it is trans-gauche I-gauche I for the minor component. One of the sulfate anions ...
8
N Acetyl DL phenylglycine
... The title compound, (I) (Fig. 1), can be used as an inter- mediate for the optical resolution of dl -phenylglycine (Wang et al., 2004). It crystallizes with two molecules in the asym- metric unit, one of ...
8
DL Threoninium oxalate
... Fig. 2 shows the packing of molecules of (I) viewed down the b axis. The semi-oxalate ions form hydrogen-bonded strings generated by the glide plane as in dl-arginine semi- oxalate complex (Chandra et al., ...
9
DL Leucinium nitrate
... The molecular packing arrangement adopted in (I) was previously observed in other compounds, such as l -leucine, l - leucinium nitrate, glycyl- dl -leucine (Bombicz et al., 2000) and d -phenylglycinium ...
7
DL Methioninium dihydrogenphosphate
... Methionine, an essential amino acid, is one of the two sulfur- containing amino acids and is indispensable for normal metabolism, growth and maintenance of body tissues. Methionine reacts with adenosine triphosphate to ...
9