| 单词 | amino group |
| 例句 | Not remembering which of the bases had amino groups, he could not qualitatively describe the quantum-mechanical argument until he asked Chargaff to write out their formulas. Double Helix 1968-02-27T00:00:00Z For the other dispersion, they coated the particles with the polysaccharide chitosan, which contains positively charged amino groups in neutral or acidic environment. Recycling of water-based adhesive achieved by changing pH 2023-11-13T05:00:00Z The carboxyl group of one amino acid and the amino group of a second amino acid combine, releasing a water molecule. Concepts of Biology 2013-04-25T00:00:00Z For glycine, the acid strength of the carboxyl group is about the same as that of acetic acid, CH3CO2H, and the base strength of the amino group is slightly greater than that of ammonia, NH3. Chemistry 2019-02-14T00:00:00Z The carboxyl group of one amino acid and the amino group of the incoming amino acid combine, releasing a molecule of water. Biology for AP Courses 2022-06-09T00:00:00Z The peptide bond is formed between the amino group of one amino acid and the carboxyl group of another amino acid. Miller & Levine Biology 2018-01-01T00:00:00Z An amino acid is a molecule composed of an amino group and a carboxyl group, together with a variable side chain. Anatomy and Physiology 2013-06-19T00:00:00Z As the hydroxyl groups in aurin correspond to the amino groups in pararosaniline, two of these in the latter compound must be in the para position. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z In the preparation of the azo dyes the starting-point is a primary amine; the amino group is 'diazotized', i.e. treated with a solution of sodium nitrite and dilute mineral acid at low temperature. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z The carboxyl group of one amino acid is linked to the amino group of the incoming amino acid. Biology for AP Courses 2022-06-09T00:00:00Z The meta-nitro-compound, which is precipitated last, is then reduced, and the amino group so formed is replaced by the hydroxyl group by means of the Sandmeyer reaction. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" These amino acids have an amino group and a carboxyl group in their chemical structures. Anatomy and Physiology 2013-06-19T00:00:00Z By the action of hydroxylamine or phenylhydrazine on aldehydes or ketones, condensation occurs between the carbonyl oxygen of the aldehyde or ketone and the amino group of the hydroxylamine or hydrazine. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" They are usually yellowish brown or red in colour, the presence of more amino groups leading to browner shades, whilst the introduction of alkylated amino groups gives redder shades. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon" Each amino acid must have its amino group removed prior to entry into these pathways. Biology for AP Courses 2022-06-09T00:00:00Z Anilides, compounds in which the amino group is substituted by an acid radical, are prepared by heating aniline with certain acids; antifebrin or acetanilide is thus obtained from acetic acid and aniline. Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 Proteins are made up of amino acids, which contain positively charged amino groups and negatively charged carboxyl groups. Anatomy and Physiology 2013-06-19T00:00:00Z The amino group is more powerful than the hydroxyl, and the substituted amino group more powerful still; the repeated substitution of hydroxyl groups sometimes causes an intensification and sometimes a diminution of colour. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Proline has an R group that is linked to the amino group, forming a ring- like structure. Biology for AP Courses 2022-06-09T00:00:00Z Peptide bonds form between the amino group of the amino acid attached to the A-site tRNA and the carboxyl group of the amino acid attached to the P-site tRNA. Biology for AP Courses 2022-06-09T00:00:00Z Each polypeptide has a free amino group at one end. Biology for AP Courses 2022-06-09T00:00:00Z They are bases because they contain an amino group that has the potential of binding an extra hydrogen, thus decreasing the hydrogen ion concentration in its environment, making it more basic. Biology for AP Courses 2022-06-09T00:00:00Z The same increase accompanies the introduction of the amino group into aromatic nuclei. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Each amino acid has a central carbon that is linked to an amino group, a carboxyl group, a hydrogen atom, and an R group or side chain. Biology for AP Courses 2022-06-09T00:00:00Z The name "amino acid" is derived from the fact that they contain both amino group and carboxyl-acid-group in their basic structure. Biology for AP Courses 2022-06-09T00:00:00Z |
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