Tag Archives: Katarzyna CHOJNACKA

Soybean meal enriched with Cu(II) by biosorption ? a new product for animals

Zuzanna WITKOWSKA, Katarzyna CHOJNACKA, Mateusz SAMORAJ, Łukasz TUHY ?Institute of Inorganic Technology and Mineral Fertilizers, Faculty of Chemistry, Wroclaw University of Technology, Poland Please cite as: CHEMIK 2013, 67, 7, 642?647 Abstract: The aim was to develop a new generation feed additive with copper using the biosorption method. The process was conducted in a fixed-bed reactor with capacity of 2.5 dm3. Soybean meal constituted the matrix for microelement ions. The bed was enriched by pouring the solution with Cu(II) ions at concentration of 300 mg/dm3 from the top of the column. The process was conducted for 6 hours. The adsorption kinetics was described using Yoon and Nelson kinetic model. The analysis showed that after the first and the second hour, the degree of ion binding was 97.3 and 85.9%, respectively. In the next hours of the process the degree of ion biding was much lower and was 53.4, 33.2, 20.9 and 14.3% after third, fourth, fifth and sixth hour, respectively. Keywords: bio-sorption, feed additives, fixed-bed reactor, microelements, soybean meal A new generation of feed additive with copper...
Read more

Seaweed extracts as biostimulants of plant growth: review

Łukasz TUHY, Jolanta CHOWAŃSKA, Katarzyna CHOJNACKA ? Institute of Inorganic Technology and Mineral Fertilizers, Faculty of Chemistry, Wroclaw University of Technology, Poland Please cite as: CHEMIK 2013, 67, 7, 636?641 Abstract: For increased efficiency of plant cultivation, new methods basing on seaweed extracts as biostimulants of plant growth are applied. Due to the presence of many biologically active compounds, seaweed extracts are widely used as plant stimulants. Thanks to bioactive substances, algae extracts can regulate the growth and development of plants. Application of seaweed extracts results in higher pathogen and environmental stress resistance in plants. Keywords: seaweeds, seaweed extracts, plant cultivation, biostimulants Seaweeds Seaweed extracts are the new type of products currently used in plant cultivation. The sources of seaweed extracts are different species of marine algae which seem to be valuable and not wholly discovered biological material [1]. For ages, extracts obtained from algae have been used as feed additives for animals nutrition improvement [2]. Furthermore, they have been used as industrial raw material or in production of natural...
Read more