A simple route for the synthesis of pyrazolo [3,4-b] [l,4]oxazines by the reaction of pyrazole-4-oxime derivatives 1 with active methylene reagents has been reported.
This investigation was carried out during the two successive seasons of 2013 and 2014 in a private orchard located at "New Gamgarah, Benha" district, Qalyubeia Governerate to study the effect of some stimulating substances i.e., (GA 3 , NAA, seaweeds , yeast extract and proplis) at different concentrations on some fruiting parameters and fruit properties as well as leaf nutritional status of Washington navel orange trees budded on sour orange reatstock. Trees under study were 18-year-old, grown in a clay leamy soil and planted at 5 meters apart under flood irrigation system. Obtained results revealed that all investigated stimulating substances treatments under study as foliar spray at various concentrations resulted in a significant increase in fruit set percentage and yield either Kg/tree or ton/feddan as well as the yield increment % in relation to the control, however decreased the percentage of fruit drop in comparison with the control during both seasons of study. Moreover, both fruit physical characters such as (fruit weight, volume, height, diameter and fruit shap index) and fruit chemical properties (TSS %, total acidity and TSS %, /acid ratio) were significantly improved as a result of sprayed trees with the above mentioned stimulating substances treatments. In addition to that, leaf nutrient contents were improved in all studied treatments from the standpoint of statistic as compared to the control during both the first and second seasons of study. Generally, it could be concluded that, most of investigated treatments resulted in a positive and significant effect on most studied properties, since both treatments of active dry yeast at (150 and 100 ml 3 /L)were the most effective treatments for increasing both fruit set % and productivity while decreasing fruit drop % as well as improving both the most studied of fruit properties and leaf nutrient contents of Washington navel orange trees
This study was carried out at the Tissue Culture and Germplasm Conservation Research Laboratory, Horticulture Research Institute, Agricultural Research Center, Giza, Egypt. in cooperation with Department of Horticulture, Faculty of Agriculture, Benha University, Egypt. from 2016 to 2020.
Medicinal plants contain many reduction substances e.g. terpenoids, flavonoids, tannins, and glycosides. Melia azedarach and Artemisia herba-alba are rich in these compounds that are able to reduce chromium metal (VI) to chromium nanoparticles (Cr2O3). Chromium oxide nanoparticles were green synthesized by the reduction of potassium dichromate solution with Melia azedarach and Artemisia herba-alba plant extract. In biological methods, Cr2O3 nanoparticles were synthesized by two biological agents of Erwinia amylovora dry matter and extraction. The resulting Cr2O3 nanoparticles were characterized by transmission electron microscopy (TEM), UV-VIS absorption spectroscopy. The antibacterial effect of Cr2O3 nanoparticles against E. amylovora gave the highest inhibition zone for Cr2O3 nanoparticles reduction by Artemisia followed by Melia (31.0 and 25.0 mm respectively). These particles were shown to have an effective bactericide on contaminated callus pear cells by Erwinia bacteria which gave survival 75% and 50% and 0.0% contamination.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.