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Dl-Asparaginium perchlorate.

ABSTRACT: Two enantiomeric counterparts (l- and d-asparginium cations related by glide planes) are present in the structure of the title compound, C(4)H(9)N(2)O(3) (+)·ClO(4) (-), with a 1:1 cation-anion ratio. The structure is built up from asparginium cations and perchlorate anions. In the crystal, mol-ecules assemble in double layers parallel to (100) through N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds. In the asparginium layers, hydrogen bonds generate alternating R(2) (2)(8) and R(4) (3)(18) graph-set motifs. Further hydrogen bonds involving the anions and cations result in the formation of a three-dimensional network.

SUBMITTER: Guenifa F

PROVIDER: S-EPMC2969914 | biostudies-literature |

REPOSITORIES: biostudies-literature

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dl-Asparaginium nitrate.

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Project description:The title compound, C(4)H(8)N(3)O(+)·ClO(4) (-), is built up from creatininium cations and perchlorate anions. Crystal cohesion and perchlorate stability are ensured by N-H?O hydrogen bonds that together with weak C-H?O inter-actions build up a three-dimensional network.

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Project description:IN THE CRYSTAL STRUCTURE OF THE TITLE COMPOUND [SYSTEMATIC NAME: 1-(2-hy-droxy-eth-yl)-2-methyl-5-nitro-1H-imidazol-3-ium perchlorate], C(6)H(10)N(3)O(3) (+)·ClO(4) (-), the cations are linked by inter-molecular N-H⋯O hydrogen bonds into zigzag chains along the c axis. The cations and anions are connected by O-H⋯O and C-H⋯O hydrogen bonds. A weak intra-molecular C-H⋯O hydrogen bond is also observed.

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DL-Methionyl-DL-Methionine/DL-Methionine Supplementation Alleviated the Adverse Effects of Dietary Low Fishmeal Levels on Growth and Intestinal Health of <i>Micropterus salmoides</i>.

Project description:DL-methionyl-DL-methionine (AQUAVI® Met-Met) (Met-Met) (0.10%, 0.20%, 0.30%, and 0.40%) or DL-methionine (DL-Met) (0.10%, 0.20%, 0.30%, and 0.40%) were added to a low-fishmeal diet in an attempt to reduce fishmeal in the diet of Micropterus salmoides (M. salmoides). The fish were randomly allocated into ten experimental groups (n = 100), each with 4 replicates of 25 fish (16.39 ± 0.01 g) each. Compared to 25% FM, 0.40% of DL-Met and 0.10% of Met-Met promoted growth, and 0.10% of Met-Met decreased FCR. Compared to 25% FM, the supplementation of Met-Met or DL-Met improved the intestinal antioxidant capacity by upregulating the NF-E2-related factor 2-mediated antioxidant factors and enzyme activities and nuclear factor kappa-B-mediated anti-inflammatory factors while downregulating the pro-inflammatory factors, thereby exerting anti-inflammatory effects. Moreover, 0.10% of the Met-Met diet affected the Firmicutes-to-Bacteroidota ratio, increased the levels of Proteobacteria, changed the composition of intestinal flora (Roseburia, Lachnospiraceae_NK4A136_group, and unclassified_Oscillospiraceae), and enhanced intestinal dominant bacteria (Caldicoprobacter, Pseudogracilibacillus, and Parasutterella), leading to improved gut health. In summary, the supplementation of DL-Met or Met-Met alleviated the adverse effect of fishmeal reduction (from 40 to 25%) on the growth performance and intestinal health of M. salmoides.

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