| 词汇 | urea |
| 释义 | urea noun[ U ] chemistry specializeduk /jʊəˈriː.ə/ us /jʊˈriː.ə/ a substance found in urine and also made from ammonia, used in fertilizers, animal feed, and in the plastics industry尿素 Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine calcium fluorine germanium iodine lithium manganese nickel plutonium quicksilver selenium silicon sodium transition metal You can also find related words, phrases, and synonyms in the topics: Substances & structures in the body urea | American Dictionaryurea noun[ U ] us/jʊˈri·ə/ biology a colorless substance found in urine Examples of ureaurea Thereby, a continuous supply of urea and amino acids to an open reaction system would be expected to overcome this limitation. The glomerular lesions and disappearance of glomeruli compromised the renal function of these animals, a fact reflected in raised serum potassium and urea concentrations. However, she showed high serum urea and creatinine levels and it was impossible to decrease fluid overload because of poor hemodynamic status. During that time period, the ammonium loss from sulphur-coated urea was significantly greater than that measured from the composted dairy manure. Like sulphur-coated urea, composted dairy manure and poultry litter are considered slow release fertilizers. The pellet was dried, resuspended in urea dye, electrophoresed in a 10 % urea-acrylamide gel (denaturing and preparative gel) and transferred to nitrocellulose membrane. Likewise, the saturating rate is independent of urea concentration, indicating that this step buries a negligible amount of surface area. They were fed with rice straw treated with 50 g urea/l as the source of roughage throughout the experiments. Managing crop residue with green manure, urea, and tillage in a rice-wheat rotation. The high grain ration initially comprised 50 % rolled sorghum and 50 % feedlot meal mix (lucerne, sorghum, barley, molasses, macronutrients, no urea or antibiotics). Many elderly patients are admitted to hospital with a raised urea, usually considered to be caused by dehydration. After urea application, one field was not harvested due to the death of the far mer, and another due to drought. The price of urea has been used as a base value for the estimation of these prices. As a result, seven fields were not planted and, in a further seven fields, not all the required urea was applied. Individual oligomers produced in heating experiments on urea-amino acid mixtures were analysed using a liquid chromatograph mass spectrometer. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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