In 2009-2011 field trials were completed at the Experimental Station of Aleksan� dras Stulginskis University. The aim of the trial was to esta�lish the e� ect of addi� im of the trial was to esta�lish the e�ect of addi� tional leaf spray fertilization with sollutions of the microelement fertilizers ARVI and �iological free amino acid preparation Terra Sor� Foliar on spring rape (Brassica napus L. oleifera annua Metzg.) seed yield and quality indices.SW 'Landmark' spring rape was under the trial in the experiment. Before the trial, the field was fertilized with complex fertilizers NPK 16:16:16 250 kg ha -1 and ammonium saltpetre (N 34 ) 150 kg ha -1 (�asal fertilisation -control). Spring rape was sown in the third decade of April. The seed norm was 7 kg ha -1. At the �ud stage of the spring rape (stage 53-54 according to BBCH scale), the trial plots were leaf sprayed with ARVI of the microfertilizer solution (6 l ha ), and the mixture of the ARVI microfertil� izers + Terra Sor� Foliar solution. Other agrotechnical applications were carried out according to the spring rape growing technologies applied at the experimental station. Rape seeds were harvested �y a com�ine harvester and samples for the chemical analyses were taken. Trial results were estimated �y means of the disper� sive analysis, employing the computer program ANOVA.The trial results revealed that the additional leaf spray fertilization with the ARVI microfertilizers at the �ud stage resulted in the statistically significant in� crease in the spring rape yield �y 0.08 t ha -1 or 3.5%. The application of the Terra Sor� Foliar solution resulted in the statistically significant increase of the seed yield �y 0.09 t ha -1 or 4.0%. In comparison to the control, leaf spray fertilization of the spring rape with the ARVI micro + preparation Terra Sor� Foliar solution mixture resulted in the significantly higher 0.11 t ha -1 or 4.9% higher seed yield. The additional leaf spray fertilization contri�uted to higher accumulation of fats in the rape seeds. The leaf spray fertilization of the rape with ARVI microfer� tilizers, Terra Sor� Foliar, and ARVI micro + Terra Sor� Foliar solution mixture resulted in the significant increase in the fats accumulated in the rape seeds �y 0.76%, 0.40%, and 1.23%, respectively. The e�ect of the Terra Sor� Foliar contri�� uted to the reduction in glycosinolades �y 0.71-0.81 μmol g -1 , and increase in erucic acid �y 0.17-0.28%. In comparison to the control, the additional leaf spray fertilization with the ARVI microfertilizers resulted in 0.26% higher amount of the erucic acid.

Applications of biological agents intensify the growth of crops, so they more quickly form a maximum leaf area, optimize photosynthesis, increase plant productivity and quality. Chemical producers offer a new generation of bio-organic fertilizers based on nano technologies. Such fertilizers have not been well investigated yet; therefore, the aim of this study was to ascertain the influence of the fertilization rates by bio-organic nano fertilizer, made from cattle manure on the effectiveness of sugar beet crop photosynthesis and productivity parameters. The investigations were carried out in 2011-2012 at Aleksandras Stulginskis University's Research Station, Kaunas district, Lithuania (54º52′ N, 23º49′ E) on a silty loam Luvisol (Calcari-Epihypogleyic Luvisol, LVg-p-w-cc). Sugar beet plants were sprayed with the fertilizer at doses of 0.5 or 1.0 L ha -1 at the BBCH 18 and/or BBCH 31 stages. Single application of the bio-organic fertilizer at single 1 L ha -1 dose was more effective than at single 0.5 L ha -1 or double 0.5 + 0.5 L ha -1 doses. At the beginning of intensive sugar beet development (BBCH 37-38), single 1 L hadose increased the number of leaves by 19.6%, leaf area by 13.4%, root diameter by 11.1%, canopy dry biomass by 29.1%, root biomass by 42.6%, net photosynthetic productivity by 15.8%, root yield by 12.6%, sucrose content by 1.03 percentage points and yield of white sugar by 19.2% in comparison with the untreated beets. Double 1 + 1 L ha -1 dose of fertilizer was slightly more effective but economically less suitable than single (1 L ha -1 ). In general, the application of bio-organic fertilizer revealed a great potential for optimization of sugar beet development, productivity and quality parameters.

New N,N-disubstituted β-amino acids and their derivatives with thiazole, aromatic, and heterocyclic substituents were synthesized from N-phenyl-N-thiocarbamoyl-β-alanine by the Hantzsch method; derivatives with hydrazone fragments were also obtained. Some of the synthesized compounds exhibited discrete antimicrobial activity, and 3-[(4-oxo-4,5-dihydro-1,3-thiazol-2-yl)(phenyl)amino]propanoic acid was found to promote rapeseed growth and to increase seed yield and oil content.

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