Severity: Warning
Message: file_get_contents(https://...@gmail.com&api_key=61f08fa0b96a73de8c900d749fcb997acc09): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
Filename: helpers/my_audit_helper.php
Line Number: 143
Backtrace:
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 143
Function: file_get_contents
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 209
Function: simplexml_load_file_from_url
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3098
Function: getPubMedXML
File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global
File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword
File: /var/www/html/index.php
Line: 316
Function: require_once
Severity: Warning
Message: Attempt to read property "Count" on bool
Filename: helpers/my_audit_helper.php
Line Number: 3100
Backtrace:
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3100
Function: _error_handler
File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global
File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword
File: /var/www/html/index.php
Line: 316
Function: require_once
Background: The effects of ultraviolet B (UV-B) radiation on plants are well known and have recently attracted a great deal of attention due to the production of large quantities of secondary metabolites, which are very beneficial for human health. Recent studies have demonstrated the possibility of exploiting UV-B radiation to induce metabolic changes in fruit, vegetables, and herbs. The role of UV-B rays in inducing secondary plant metabolites is enhanced by new plastic films, which, as a result of their optical properties, permit the necessary dosage of UV-B to be transmitted into the greenhouse to stimulate such metabolites without altering the harvest.
Results: The main goal of the present paper is to demonstrate that, by using a greenhouse plastic film with appropriate transmittance of UV-B for rocket salad cultivation, it is possible to increase the nutraceutical elements in comparison with the same species grown in absence of such radiation. Tests compared nutritional elements extracted from rocket salad grown under greenhouses covered with several plastic films differing in UV-B transmittance. We found that rocket salad grown under plastic with 27% UV-B transmittance exhibited very high luteolin and quercetin content in comparison with rocket salad cultivated under film blocking UV-B radiation.
Conclusions: Our experimental results confirm the possibility of exploiting UV-B radiation in the correct amounts by appropriate greenhouse plastic covers, to produce natural 'medicines' using the plants and to satisfy increasing consumer demand for natural health-promoting food products. © 2019 Society of Chemical Industry.
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Source |
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http://dx.doi.org/10.1002/jsfa.9980 | DOI Listing |
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