Influence of agricultural fertilizer practices on certain piercing sucking pests infesting cucumber plants

2015 ◽  
Vol 8 (1) ◽  
pp. 99-104
Author(s):  
B. S. Wahba
2019 ◽  
Vol 25 (11) ◽  
pp. 1187-1199 ◽  
Author(s):  
Soukaina Bouissil ◽  
Guillaume Pierre ◽  
Zainab El Alaoui-Talibi ◽  
Philippe Michaud ◽  
C. El Modafar ◽  
...  

Background: Recently, researchers have given more and more consideration to natural polysaccharides thanks to their huge properties such as stability, biodegradability and biocompatibility for food and therapeutics applications. Methods: a number of enzymatic and chemical processes were performed to generate bioactive molecules, such as low molecular weight fractions and oligosaccharides derivatives from algal polysaccharides. Results: These considerable characteristics allow algal polysaccharides and their derivatives such as low molecular weight polymers and oligosaccharides structures to have great potential to be used in lots of domains, such as pharmaceutics and agriculture etc. Conclusion: The present review describes the mains polysaccharides structures from Algae and focuses on the currents agricultural (fertilizer, bio-elicitor, stimulators, signaling molecules and activators) and pharmaceutical (wound dressing, tissues engineering and drugs delivery) applications by using polysaccharides and/or their oligosaccharides derivatives obtained by chemical, physical and enzymatic processes.


1978 ◽  
Vol 42 (1) ◽  
pp. 40
Author(s):  
Larry F. Fredrickson ◽  
Raymond L. Linder ◽  
Robert B. Dahlgren ◽  
Carl G. Trautman

Author(s):  
Wei Li ◽  
Philippe Ciais ◽  
Mengjie Han ◽  
Qing Zhao ◽  
Jinfeng Chang ◽  
...  

2007 ◽  
Vol 53 (6) ◽  
pp. 659-671 ◽  
Author(s):  
Mohammad Khan Jamali ◽  
Tasneem Gul Kazi ◽  
Mohammad Balal Arain ◽  
Hassan Imran Afridi ◽  
Nusrat Jalbani ◽  
...  

2007 ◽  
Vol 31 (5) ◽  
pp. 939-946
Author(s):  
Fabiana Rodrigues Ribeiro ◽  
Fernando Barboza Egreja Filho ◽  
José Domingos Fabris ◽  
Wagner da Nova Mussel ◽  
Roberto Ferreira Novais

The industrial refining of kaolin involves the removal of iron oxides and hydroxides along with other impurities that cause discoloration of the final product and depreciate its commercial value, particularly undesirable if destined to the paper industry. The chemical leaching in the industrial processing requires treatments with sodium hyposulfite, metallic zinc, or sulfuric and phosphoric acids, in order to reduce, dissolve and remove ferruginous compounds. To mitigate the environmental impact, the acidic effluent from the leaching process must be neutralized, usually with calcium oxide. The resulting solid residue contains phosphorous, zinc, and calcium, among other essential nutrients for plant growth, suggesting its use as a macro and micronutrient source. Samples of such a solid industrial residue were used here to evaluate their potential as soil fertilizer in an incubation greenhouse experiment with two soil samples (clayey and medium-textured). The small pH shift generated by applying the residue to the soil was not a limiting factor for its use in agriculture. The evolution of the concentrations of exchangeable calcium, and phosphorous and zinc extractability by Mehlich-1 extractant during the incubation period confirms the potential use of this industrial residue as agricultural fertilizer.


2007 ◽  
Vol 56 (11) ◽  
pp. 151-158 ◽  
Author(s):  
F.T. Lange ◽  
M. Wenz ◽  
C.K. Schmidt ◽  
H.-J. Brauch

Different homologues of C4 to C8 perfluoroalkyl carboxylates (PFCAs) and perfluoroalkyl sulfonates (PFASs) were detected in German surface waters, bank filtrates, artificially recharged groundwaters, and drinking waters. If no point sources are located nearby, the typically measured levels are in the low ng/L range. In the presence of point sources, such as a fluorochemical production site, a leaching agricultural fertilizer contaminated with PFCAs and PFASs, or drained PFC containing fire-fighting foams, much higher concentrations in the μg/L range occur. This situation is similar in Germany and other countries.


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