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Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In the experiment, different concentrations of N-carbamylglutamic (NCG) were added to the diet to determine the production performance, egg quality, plasma nitric oxide (NO) and nitric oxide synthase ( NOS) level changes, to explore the effect of NCG-NO pathway on egg production and egg quality functions of Dagu chicken hens. A total of 12-week-old 192 Dagu chicken hens were randomly divided into four groups with four replicates in each group and 12 replicates in each group. The control group Dagu chicken hens were fed with basic diet, and the experimental groups Dagu chicken hens were fed with 0.08% and 0.12%, 0.16% level of NCG diet. The pre-test period was 1 w, and the experiment lasted for 25 w. The results showed that the egg production rate of 0.08% NCG group and 0.12% NCG group was significantly higher than that of control group (P<0.05). Among all groups, 0.12% NCG group had the lowest feed to egg ratio, and yolk color in NCG groups was significantly higher than that in control group (P<0.05). The egg shape index and the protein height of the 0.12% NCG group were significantly higher than that of control group and other experimental groups (P<0.05). NO content of 0.12% NCG group was significantly higher than other groups (P<0.05). The experiment indicates that dietary supplementation of 0.08% to 0.16% NCG can improve performance and egg quality of broilers during peak laying period, and the effect of NCG at 0.12% NCG level is the best. [ABSTRACT FROM AUTHOR]

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to solve the issue of malicious phonily occupying seats for some ticket agents or passengers in the process of air ticket sales, this paper proposed a blockchain system scheme based on the improved PoA consensus mechanism. The scheme used the alliance blockchain as a communication platform among airlines, adopted credit points and dynamic grading to build a new PoA consensus mechanism, protected passengers ' private information with hash algorithm, and achieved digital storage of ID information, registration of passengers, storage and sharing of passenger booking information for airline corporations relying on smart contracts. The prototype system trial operation shows that the system can timely detect and effectively stop the phonily occupying seats behavior. After analysis and evaluation, the program has the characteristics of privacy protection, decentralization and high security, and provides a new reference to solve the long-standing problem of phonily occupying seats in the civil aviation field. [ABSTRACT FROM AUTHOR]