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Use of some exotic natural extracts in cosmetics
Phan, Huong Tra ; Němcová, Andrea (referee) ; Márová, Ivana (advisor)
The objective of this bachelor thesis was a general characterization of the antioxidant effect of exotic plants and their extracts. The selected plants were Zingiber officinale, Turmeric longa and Momordica charantia. Theoretical part focuses on antioxidative properties, genereal characteristics of selected plants and description of the methods applied in the experimental part. In the experimental part, content of the antioxidant activity, polyphenols, flavonoids were characterized by spectrophotometry. Major active ingredient (curcumin, gingerol) and other substances like tocopherol were determined by HPLC/UV-VIS. Finally, potential practical use of these active substances in the field of cosmetics including skin hydration measurement was tested.
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Eliminace negativního vlivu tepelného stresu u brojlerových kuřat pomocí rostlinných aditiv
Zmrhal, Vladimír
The aim of the diploma thesis was to evaluated the effect of supplementation plant additive based on extracts, from turmeric (Curcuma) and baical skullcap (Scutellaria baicalensis) on broiler chickens exposed to heat stress at the end of fattening. The effect of plant additive on performance parameters, meat quality, lymphatic organ weight, biochemical blood profile, pro and anti-inflammatory cytokine levels, heat shock proteins, leukocyte counts, apparent ileal amino acid digestibility, metabolizable energy and chicken behavior were evaluated. Plant additive fed from the 21st day of chickens age significantly improved (P<0.05) feed conversion ratio at optimal temperatures and significantly increased (P<0.05) body weight gain at elevated temperatures (27–29 ° C). The addition of plant additive has significantly increased (P<0.05) metabolizable energy as well as the apparent ileal digestibility of the amino acids lysine, threonine, arginine, histidine, phenylalanine, valine, leucine, isoleucine, tyrosine, serine, glycine, aspartic and glutamic acid and alanine. Significantly lower (P<0.05) manifestations of thermoregulatory behavior (wings lifting and open beaks) in the experimental group with plant extracts were found in the ethological observation. Results of diploma thesis showed that the addition of a mixture of turmeric and baical scullcap extracts can be used to reduce the negative effects of heat stress on the performance of broiler chickens.
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Use of some exotic natural extracts in cosmetics
Phan, Huong Tra ; Němcová, Andrea (referee) ; Márová, Ivana (advisor)
The objective of this bachelor thesis was a general characterization of the antioxidant effect of exotic plants and their extracts. The selected plants were Zingiber officinale, Turmeric longa and Momordica charantia. Theoretical part focuses on antioxidative properties, genereal characteristics of selected plants and description of the methods applied in the experimental part. In the experimental part, content of the antioxidant activity, polyphenols, flavonoids were characterized by spectrophotometry. Major active ingredient (curcumin, gingerol) and other substances like tocopherol were determined by HPLC/UV-VIS. Finally, potential practical use of these active substances in the field of cosmetics including skin hydration measurement was tested.
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