34 research outputs found
The influence of mineral fillers on mechanical properties of polyvinyl chloride composites
The paper reports the investigation results of tensile stress-strain properties of filled PVC composite during static and low cycle testing. The distinctive features of composite mechanical behavior depending on the content of dispersed mineral fillers which are basically industrial waste are established. It is revealed that small filler additives have a strong influence on the structural behavior that manifest itself as their abnormal change depending on the filler content. The experimental data obtained are explained based on the modern ideas about structural morphological model of base polymer structure. Β© IDOSI Publications, 2013
Π‘ΡΠ°Π²Π½ΠΈΡΠ΅Π»ΡΠ½Π°Ρ ΠΎΡΠ΅Π½ΠΊΠ° ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ Π½Π΅ΠΊΠΎΡΠΎΡΡΡ Π±ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈ Π°ΠΊΡΠΈΠ²Π½ΡΡ ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ Π² Π»Π΅ΡΠ½ΠΎΠΌ ΠΊΡΠΏΡΡΠ΅ Anthriscus sylvestris (L.) Hoffm. ΠΈ ΡΠ°Π΄ΠΎΠ²ΠΎΠΌ ΠΊΠ΅ΡΠ²Π΅Π»Π΅ Anthriscus cerefolium (L.) Hoffm.
Relevance. A rare representative of the Apiaceae family the garden chervil is widely used abroad in nutrition and in folk and traditional medicine.Methods. Evaluation of nutritional potential of Anthriscus cerefolium (L.) Hoffm and Anthriscus sylvestris Hoffm grown in Moscow region is achieved using the parameters of ascorbic acid, polyphenols, flavonoids, total antioxidant activity of ethanolic extracts.Results. Garden chervil (Anthriscus cerefolium) was characterized by lower concentrations of ascorbic acid (1.6-1.8 times), phenolics (2.2-2.5 times), flavonoids (1.8-2.2 times), total antioxidant activity (1-1.54 times) and dry matter content (2.4-4.9 times) than wild chervil (Anthriscus sylvestris) but demonstrated significantly higher levels of total dissolved solids. Significantly higher content of dry matter in leaves and especially stems of wild chervil correlates with low nutritional value of stems despite large total mass of plants compared to garden chervil. Contrary to wild chervil, Anthriscus cerefolium recorded unusually high concentrations of carotene in leaves and significantly lower levels of chlorophyll b. Seeds of garden chervil were also characterized by low antioxidant status contrary to wild chervil and seeds of curly parsley. High yield and significant nutritional value of garden chervil indicate important prospects of its wide-scale cultivation in Russia while Anthriscus sylvestris plants seem to be important in breeding processes.ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ. ΠΠ°Π»ΠΎ ΡΠ°ΡΠΏΡΠΎΡΡΡΠ°Π½Π΅Π½Π½ΡΠΉ Π² Π ΠΎΡΡΠΈΠΈ ΠΏΡΠ΅Π΄ΡΡΠ°Π²ΠΈΡΠ΅Π»Ρ ΡΠ΅ΠΌΠ΅ΠΉΡΡΠ²Π° Apiaceae ΡΠ°Π΄ΠΎΠ²ΡΠΉ ΠΊΠ΅ΡΠ²Π΅Π»Ρ ΡΠΈΡΠΎΠΊΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΡΡΡ Π·Π° ΡΡΠ±Π΅ΠΆΠΎΠΌ Π² ΠΏΠΈΡΠ°Π½ΠΈΠΈ ΠΈ Π²ΡΡΠΎΠΊΠΎ ΡΠ΅Π½ΠΈΡΡΡ Π² Π½Π°ΡΠΎΠ΄Π½ΠΎΠΉ ΠΈ ΡΡΠ°Π΄ΠΈΡΠΈΠΎΠ½Π½ΠΎΠΉ ΠΌΠ΅Π΄ΠΈΡΠΈΠ½Π΅.ΠΠ°ΡΠ΅ΡΠΈΠ°Π» ΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠ°. ΠΡΠΎΠ²Π΅Π΄Π΅Π½Π° ΠΎΡΠ΅Π½ΠΊΠ° ΠΏΠΈΡΠ΅Π²ΠΎΠΉ ΡΠ΅Π½Π½ΠΎΡΡΠΈ ΡΠ°Π΄ΠΎΠ²ΠΎΠ³ΠΎ ΠΈ Π΄ΠΈΠΊΠΎΠ³ΠΎ ΠΊΠ΅ΡΠ²Π΅Π»Ρ (Π»Π΅ΡΠ½ΠΎΠ³ΠΎ ΠΊΡΠΏΡΡΡ) Π‘ΡΠ΅Π΄Π½Π΅ΠΉ ΠΏΠΎΠ»ΠΎΡΡ Π ΠΎΡΡΠΈΠΈ ΠΏΠΎ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»ΡΠΌ Π½Π°ΠΊΠΎΠΏΠ»Π΅Π½ΠΈΡ Π°ΡΠΊΠΎΡΠ±ΠΈΠ½ΠΎΠ²ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΡ, ΠΏΠΎΠ»ΠΈΡΠ΅Π½ΠΎΠ»ΠΎΠ², ΡΠ»Π°Π²ΠΎΠ½ΠΎΠΈΠ΄ΠΎΠ², Π½ΠΈΡΡΠ°ΡΠΎΠ², ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ Π²ΠΎΠ΄ΠΎΡΠ°ΡΡΠ²ΠΎΡΠΈΠΌΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ ΠΈ ΡΡΠΎΠ²Π½Ρ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠ½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΠΏΠΈΡΡΠΎΠ²ΡΡ
ΡΠΊΡΡΡΠ°ΠΊΡΠΎΠ² ΡΠ°ΡΡΠ΅Π½ΠΈΠΉ.Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π½Π°Π·Π΅ΠΌΠ½Π°Ρ ΡΠ°ΡΡΡ ΡΠ°Π΄ΠΎΠ²ΠΎΠ³ΠΎ ΠΊΠ΅ΡΠ²Π΅Π»Ρ ΡΠΎΠ΄Π΅ΡΠΆΠΈΡ Π±ΠΎΠ»Π΅Π΅ Π½ΠΈΠ·ΠΊΠΈΠ΅ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Π²ΠΈΡΠ°ΠΌΠΈΠ½Π° Π‘, ΠΏΠΎΠ»ΠΈΡΠ΅Π½ΠΎΠ»ΠΎΠ², ΡΠ»Π°Π²ΠΎΠ½ΠΎΠΈΠ΄ΠΎΠ², ΡΡΡ
ΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° ΠΈ ΠΎΠ±ΡΠ΅ΠΉ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠ½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΏΠΎ ΡΡΠ°Π²Π½Π΅Π½ΠΈΡ Ρ Π»Π΅ΡΠ½ΡΠΌ ΠΊΡΠΏΡΡΠ΅ΠΌ (Π² 1.6-1.8, 2.2-2.5, 1.8-2.2 ΠΈ 1-1.54 ΡΠ°Π·Π° ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ), ΠΎΠ΄Π½Π°ΠΊΠΎ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ Π±ΠΎΠ³Π°ΡΠ΅, ΡΠ΅ΠΌ ΠΊΡΠΏΡΡΡ Π»Π΅ΡΠ½ΠΎΠΉ, ΠΏΠΎ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ Π²ΠΎΠ΄ΠΎΡΠ°ΡΡΠ²ΠΎΡΠΈΠΌΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ. ΠΠ΅ΡΠ½ΠΎΠΉ ΠΊΡΠΏΡΡΡ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΠ·ΠΎΠ²Π°Π»ΡΡ Π² 2.4-4.9 ΡΠ°Π·Π° Π±ΠΎΠ»Π΅Π΅ Π²ΡΡΠΎΠΊΠΈΠΌ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ΠΌ ΡΡΡ
ΠΎΠ³ΠΎ Π²Π΅ΡΠ΅ΡΡΠ²Π° Π² Π»ΠΈΡΡΡΡΡ
ΠΈ ΡΡΠ΅Π±Π»ΡΡ
, ΡΡΠΎ ΠΎΠ±ΡΡΠ»Π°Π²Π»ΠΈΠ²Π°Π΅Ρ Π½Π΅ΠΏΡΠΈΠ³ΠΎΠ΄Π½ΠΎΡΡΡ ΡΡΠ΅Π±Π»Π΅ΠΉ Π΄ΠΈΠΊΠΎΠ³ΠΎ ΠΊΠ΅ΡΠ²Π΅Π»Ρ Π΄Π»Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Π² ΠΏΠΈΡΠ°Π½ΠΈΠΈ Π½Π΅ΡΠΌΠΎΡΡΡ Π½Π° Π±ΠΎΠ»ΡΡΡΡ ΠΌΠ°ΡΡΡ Π½Π°Π΄Π·Π΅ΠΌΠ½ΠΎΠΉ ΡΠ°ΡΡΠΈ ΡΠ°ΡΡΠ΅Π½ΠΈΡ ΠΏΠΎ ΡΡΠ°Π²Π½Π΅Π½ΠΈΡ Ρ ΡΠ°Π΄ΠΎΠ²ΡΠΌ ΠΊΠ΅ΡΠ²Π΅Π»Π΅ΠΌ. ΠΡΠ»ΠΈΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΡΡ ΡΠ°Π΄ΠΎΠ²ΠΎΠ³ΠΎ ΠΊΠ΅ΡΠ²Π΅Π»Ρ Π±ΡΠ»ΠΎ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠ΅ Π½Π°ΠΊΠΎΠΏΠ»Π΅Π½ΠΈΠ΅ ΠΊΠ°ΡΠΎΡΠΈΠ½Π° ΠΈ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎ Π±ΠΎΠ»Π΅Π΅ Π½ΠΈΠ·ΠΊΠΎΠ΅ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ Ρ
Π»ΠΎΡΠΎΡΠΈΠ»Π»Π° b Π² Π»ΠΈΡΡΡΡΡ
. Π£ΡΠΎΠ²Π½ΠΈ ΠΏΠΎΠ»ΠΈΡΠ΅Π½ΠΎΠ»ΠΎΠ² ΠΈ ΠΎΠ±ΡΠ΅ΠΉ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠ½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΡΠ΅ΠΌΡΠ½ ΡΠ°Π΄ΠΎΠ²ΠΎΠ³ΠΎ ΠΊΠ΅ΡΠ²Π΅Π»Ρ ΡΠ°ΠΊΠΆΠ΅ Π±ΡΠ»ΠΈ Π½ΠΈΠΆΠ΅, ΡΠ΅ΠΌ Π² ΡΠ΅ΠΌΠ΅Π½Π°Ρ
Π»Π΅ΡΠ½ΠΎΠ³ΠΎ ΠΊΡΠΏΡΡΡ. ΠΡΡΠΎΠΊΠΈΠ΅ ΡΡΠΎΠΆΠ°ΠΉΠ½ΠΎΡΡΡ ΠΈ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»ΠΈ ΠΏΠΈΡΠ΅Π²ΠΎΠΉ ΡΠ΅Π½Π½ΠΎΡΡΠΈ ΡΠ°Π΄ΠΎΠ²ΠΎΠ³ΠΎ ΠΊΠ΅ΡΠ²Π΅Π»Ρ ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΡΡΡ ΠΎ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ Π²ΡΡΠ°ΡΠΈΠ²Π°Π½ΠΈΡ ΡΠ°ΡΡΠ΅Π½ΠΈΡ Π² ΠΏΡΠΎΠΌΡΡΠ»Π΅Π½Π½ΠΎΠΌ ΠΌΠ°ΡΡΡΠ°Π±Π΅ ΠΈ ΡΠ΅Π»Π΅ΡΠΎΠΎΠ±ΡΠ°Π·Π½ΠΎΡΡΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΠΊΡΠΏΡΡΡ Π»Π΅ΡΠ½ΠΎΠ³ΠΎ Π² ΡΠ΅Π»Π΅ΠΊΡΠΈΠΎΠ½Π½ΠΎΠΌ ΠΏΡΠΎΡΠ΅ΡΡΠ΅
Use of Gold Nanoparticles To Enhance Capillary Electrophoresis
We describe here the use of gold nanoparticles to manipulate the selectivity between solutes in capillary electrophoresis. Two different gold-based nanoparticles were added to the run buffer. In one case, the nanoparticles were stabilized with citrate ions, but in another study, the gold nanoparticles were capped with mercaptopropionate ions (thiol-stablized). Citrate-stabilized gold nanoparticles were used in conjunction with capillaries treated with poly(diallyldimethylammonium chloride) (PDADMAC). The positively charged PDADMAC layer on the capillary walls adsorbs the negatively charged gold nanoparticles. The model solutes that were used to study the effect of the presence of the citrate-stabilized gold nanoparticles are structural isomers of aromatic acids and bases. The presence of the PDADMAC layer and the PDADMAC plus the gold nanoparticles changes both the electroosmotic mobility and the observed mobility of the solutes. These changes in the mobilities influence the observed selectivities and the separations of the system. Thiol-stabilized gold nanoparticles were used without PDADMAC in the capillary. The model solutes studied in this part are various aromatic amines. In this case as well, the presence of the gold nanoparticles modifies the electroosmotic mobility and the observed mobility of the solutes. These changes in the mobilities are manifested in selectivity alterations. The largest change in the selectivities occurs at low concentrations of the gold nanoparticles in the run buffer. The presence of nanoparticles improves the precision of the analysis and increases the separation efficiency. Nanodispersions have attracted extensive attention in various fields of physics, biology, and chemistry. [1][2][3][4][5] Physicists and chemists are intrigued by the gradual transition of the nanomaterial properties from molecule-like to those of solid-state properties by a change of a single variable, the particle size. This property has practical and future applications for nonlinear optics and electronics. The large surface area of nanomaterials intrigues chemical engineers and catalysis scientists. Surprisingly, very little research has been devoted to the application of nanoparticles for chemical separation. In this work, we demonstrate the utility and versatility of organically modified gold nanoparticles in capillary electrophoresis (CE) separations. The nanoparticles serve as large surface area platforms for organofunctional groups that interact with the capillary surface, the analytes, or both. Thus, the apparent mobilities of target analytes, as well as the electroosmotic flow, can be altered leading to enhanced selectivities. Separation of various benzene derivatives demonstrates these capabilities. Metallic nanodispersions can be prepared in aqueous and organic solvents using diverse procedures. 1,2,6-9 Nanodispersions can be stabilized in organic solvents by the solvent itself, 10 by the addition of long chain surfactants, 11,12 or by specific ligands. 13 Stabilization of metal nanodispersions in aqueous solutions is somewhat more complicated. Several successful stabilization methods are available that are based on capping of the metal nanoparticles (e.g., citrate, 6 3-mercaptopropionate, 1
The influence of mineral fillers on mechanical properties of polyvinyl chloride composites
The paper reports the investigation results of tensile stress-strain properties of filled PVC composite during static and low cycle testing. The distinctive features of composite mechanical behavior depending on the content of dispersed mineral fillers which are basically industrial waste are established. It is revealed that small filler additives have a strong influence on the structural behavior that manifest itself as their abnormal change depending on the filler content. The experimental data obtained are explained based on the modern ideas about structural morphological model of base polymer structure. Β© IDOSI Publications, 2013
The influence of mineral fillers on mechanical properties of polyvinyl chloride composites
The paper reports the investigation results of tensile stress-strain properties of filled PVC composite during static and low cycle testing. The distinctive features of composite mechanical behavior depending on the content of dispersed mineral fillers which are basically industrial waste are established. It is revealed that small filler additives have a strong influence on the structural behavior that manifest itself as their abnormal change depending on the filler content. The experimental data obtained are explained based on the modern ideas about structural morphological model of base polymer structure. Β© IDOSI Publications, 2013
The influence of mineral fillers on mechanical properties of polyvinyl chloride composites
The paper reports the investigation results of tensile stress-strain properties of filled PVC composite during static and low cycle testing. The distinctive features of composite mechanical behavior depending on the content of dispersed mineral fillers which are basically industrial waste are established. It is revealed that small filler additives have a strong influence on the structural behavior that manifest itself as their abnormal change depending on the filler content. The experimental data obtained are explained based on the modern ideas about structural morphological model of base polymer structure. Β© IDOSI Publications, 2013
Comparative evaluation of several biologically active compounds content in <i>Anthriscus sylvestris</i> (L.) Hoffm. and <i>Anthriscus cerefolium</i> (L.) Hoffm.
Relevance. A rare representative of the Apiaceae family the garden chervil is widely used abroad in nutrition and in folk and traditional medicine.Methods. Evaluation of nutritional potential of Anthriscus cerefolium (L.) Hoffm and Anthriscus sylvestris Hoffm grown in Moscow region is achieved using the parameters of ascorbic acid, polyphenols, flavonoids, total antioxidant activity of ethanolic extracts.Results. Garden chervil (Anthriscus cerefolium) was characterized by lower concentrations of ascorbic acid (1.6-1.8 times), phenolics (2.2-2.5 times), flavonoids (1.8-2.2 times), total antioxidant activity (1-1.54 times) and dry matter content (2.4-4.9 times) than wild chervil (Anthriscus sylvestris) but demonstrated significantly higher levels of total dissolved solids. Significantly higher content of dry matter in leaves and especially stems of wild chervil correlates with low nutritional value of stems despite large total mass of plants compared to garden chervil. Contrary to wild chervil, Anthriscus cerefolium recorded unusually high concentrations of carotene in leaves and significantly lower levels of chlorophyll b. Seeds of garden chervil were also characterized by low antioxidant status contrary to wild chervil and seeds of curly parsley. High yield and significant nutritional value of garden chervil indicate important prospects of its wide-scale cultivation in Russia while Anthriscus sylvestris plants seem to be important in breeding processes