Effect of different drying techniques on qualitative and quantitative properties of Stachys Schtschegleevii essential oil

2018 ◽  
Vol 42 (8) ◽  
pp. e13686 ◽  
Author(s):  
Saeid Hazrati ◽  
Poopak Farnia ◽  
Farhad Habibzadeh ◽  
Saeed Mollaei
Keyword(s):  
Essential Oil ◽  
Qualitative And Quantitative ◽  
Drying Techniques ◽  
Quantitative Properties

Comparative analysis of essential oil obtained from fresh and dried leaves of medicinal sage

2020 ◽  
pp. 39-53
Author(s):  
Tatyana Shcheglova
Keyword(s):  
Comparative Analysis ◽  
Essential Oil ◽  
Raw Materials ◽  
Quantitative Difference ◽  
Botanical Garden ◽  
Component Composition ◽  
Gas Chromatography Mass Spectrometry ◽  
Qualitative And Quantitative ◽  
Salvia Officinalis L ◽  
Medical University

The article presents results of the study of a comparative analysis of essential oil obtained from fresh and dried leaves of medicinal sage (Salvia officinalis L.), growing in the Botanical Garden of the First Moscow State Medical University named after Sechenov. The studies were carried out using gas chromatography– mass spectrometry. Qualitative and quantitative difference in the component composition of the essential oil obtained from fresh and dried raw materials was determined as a result of the study.

scholarly journals Some New Volterra-Fredholm-Type Discrete Inequalities and Their Applications in the Theory of Difference Equations

2011 ◽  
Vol 2011 ◽  
pp. 1-24 ◽  
Author(s):  
Bin Zheng ◽  
Qinghua Feng
Keyword(s):  
Difference Equations ◽  
Fredholm Type ◽  
Qualitative And Quantitative ◽  
Independent Variables ◽  
Discrete Inequalities ◽  
Quantitative Properties ◽  
Two Independent Variables

Some new Volterra-Fredholm-type discrete inequalities in two independent variables are established, which provide a handy tool in the study of qualitative and quantitative properties of solutions of certain difference equations. The established results extend some known results in the literature.

scholarly journals Comparative evaluation of properties of a clay based ceramic shaped via four techniques

Cerâmica ◽  
2018 ◽  
Vol 64 (370) ◽  
pp. 176-182 ◽  
Author(s):  
C. I. Torres ◽  
N. M. Rendtorff ◽  
M. Cipollone ◽  
E. F. Aglietti ◽  
G. Suárez
Keyword(s):  
Sintering Temperature ◽  
Continuous Process ◽  
Slip Casting ◽  
Textural Properties ◽  
Batch Process ◽  
Ceramic Ware ◽  
Kaolinite Clay ◽  
Qualitative And Quantitative ◽  
Quantitative Properties ◽  
Forming Methods

Abstract The results of qualitative and quantitative properties of clay based ceramic are presented in this work. Four different shaping methods and sintering temperatures were used to understand their influence in the final properties of a ceramic material formulated using kaolinite clay and calcined alumina. This material can be used as a structural ceramic for different applications, and there is no pre-established relation between the forming method and the final sintered properties. Forming methods used to prepare the samples were uniaxial pressing (a batch process that allows application in dry samples), extruding (a continuous process that requires moisture), slip casting (a process that allows to shape complex ceramic ware), and lamination (a batch process that requires moisture). Sintering temperatures were in the range of 1100 and 1400 °C. In order to compare how properties behave as the shaping method and sintering temperature change, textural properties, shrinkage, porosimetry, phase composition and mechanical strength were evaluated and analyzed. Scanning electron microscopy and microtomography were employed for analyzing and comparing the developed microstructures. Differences in the resulting properties are explained in terms of the developed crystalline phases and microstructure.

Uncertainty and Velocity

2016 ◽  
Author(s):  
Martin Shubik ◽  
Eric Smith
Keyword(s):  
Financial Markets ◽  
Stochastic Analysis ◽  
Control Mechanisms ◽  
Qualitative And Quantitative ◽  
Monetary Systems ◽  
Monetary Economy ◽  
Velocity Of Money ◽  
Quantitative Properties ◽  
Complex Features ◽  
And Control

In this chapter the two features of uncertainty and the variability of the velocity of money are considered. Both of these are fundamental to considering the more subtle features of a monetary economy. They are interlinked and both add further complex features to the information, perception and control mechanisms of modern monetary systems. There has been an explosive development in the study of both the qualitative and quantitative properties of risk. The power of careful modeling and sophisticated stochastic analysis has already shown itself in the context of the stockmarket and other financial markets, but as the various qualitative aspects of risk are being uncovered and made well-defined, the scope of a useful econo-physics stretches far beyond the confines of the dynamics of paper traded on paper in the financial markets to the broad control mechanisms of the economy as a whole.

Volatile compounds in pine stands suffering from pine wilt disease: qualitative and quantitative evaluation

Nematology ◽  
2006 ◽  
Vol 8 (6) ◽  
pp. 869-879 ◽  
Author(s):  
Kazuyoshi Futai ◽  
Natsumi Kanzaki ◽  
Yuko Takeuchi
Keyword(s):  
Volatile Compounds ◽  
Pine Wilt Disease ◽  
Bursaphelenchus Xylophilus ◽  
Wilt Disease ◽  
Economic Damage ◽  
Qualitative And Quantitative ◽  
Pine Wilt ◽  
Pine Trees ◽  
Quantitative Properties ◽  
Pine Stands

AbstractPine wilt disease causes ecological and economic damage in Japanese pine forests in spite of intensive effort to protect them from the pine wood nematode, Bursaphelenchus xylophilus. Pine trees infected with B. xylophilus emit a characteristic bouquet of volatile compounds bioactive to the vector beetle of the nematode, Monochamus alternatus, and potentially affecting symptom development inside the trees. To investigate the qualitative and quantitative properties of volatile compounds in the field, we profiled the volatile emissions in two Japanese black pine stands, one naturally suffering from pine wilt disease and the other artificially inoculated with B. xylophilus. In both pine stands, the emission of some terpenoids from the infected trees such as (−)-α-pinene, began to increase in summer, overlapping the oviposition season of the vector beetle, but peaked in the summer and autumn. These data suggest that the beetles may not necessarily depend on the tremendous quantity of volatiles alone when they search for suitable trees on which to oviposit.

In vitro Propagation and Chemical and Biological Studies of the Essential Oil of Salvia przewalskii Maxim

2007 ◽  
Vol 62 (11-12) ◽  
pp. 839-848 ◽  
Author(s):  
Ewa Skała ◽  
Danuta Kalemba ◽  
Anna Wajs ◽  
Marek Róźalski ◽  
Urszula Krajewska ◽  
...  
Keyword(s):  
Essential Oil ◽  
Shoot Multiplication ◽  
Quantitative Composition ◽  
Human Leukemia ◽  
Qualitative And Quantitative ◽  
H Nmr ◽  
Regenerated Plants ◽  
Biological Studies

The procedure of Salvia przewalskii shoot multiplication and the ability of regenerated plants to produce essential oil is reported. The essential oil was obtained by hydrodistillation from leaves and flowering stems of field-grown plants, and their chemical composition was examined by GC, GC-MS and 1H NMR. The differences in yield as well as qualitative and quantitative composition between the oils isolated from in vitro and in vivo plants were observed. S. przewalskii essential oil was tested for its antimicrobial and cytotoxic properties. It was found that cytotoxicity against human leukemia HL-60 cells and antimicrobial activity (especially, against Staphylococcus aureus and S. epidermidis strains) of oils isolated from in vitro plants were higher than those for oils from in vivo S. przewalskii plants.

scholarly journals GC MS Analysis of the Volatile Constituents of Essential Oil and Aromatic Waters of Artemisia Annua L. at Different Developmental Stages

2008 ◽  
Vol 3 (12) ◽  
pp. 1934578X0800301 ◽  
Author(s):  
Anna Rita Bilia ◽  
Guido Flamini ◽  
Fabrizio Morgenni ◽  
Benedetta Isacchi ◽  
Franco FrancescoVincieri
Keyword(s):  
Essential Oil ◽  
Developmental Stages ◽  
Artemisia Annua ◽  
Volatile Oil ◽  
Flowering Stage ◽  
Development Stages ◽  
Qualitative And Quantitative ◽  
Artemisia Annua L ◽  
Germacrene D ◽  
Long Time

Artemisia annua L. (Asteraceae) still represents the only source of artemisinin, considered as one of the most important drugs for the treatment of malaria and which, more recently, has been shown to be effective against numerous types of tumors. The foliage and inflorescence of A. annua also yield an essential oil upon hydrodistillation. This oil has been evaluated at different development stages (pre-flowering and flowering) by GC/MS. The volatile oil from plants at full blooming showed numerous constituents, with germacrene D (21.2%), camphor (17.6%), β-farnesene (10.2%), β-caryophyllene (9%), and bicyclogermacrene (4.2%) among the main ones. Aromatic waters, after extraction with n-hexane, showed the presence, among others, of camphor (27.7%), 1,8-cineole (14%), artemisia ketone (10.1%), α-terpineol (6.1%), trans-pinocarveol (5.4%), and artemisia alcohol (2%). From plants at the pre-flowering stage, aromatic waters were obtained with camphor (30.7%), 1,8-cineole (12.8%), artemisia alcohol (11.4%), artemisia ketone (9.5%), alpha-terpineol (5.8%), and trans-pinocarveol (3.0%) as the main constituents. The qualitative and quantitative profiles of the two aromatic waters were similar. These results permitted the conclusion to be made that A. annua could be harvested a long time before the onset of flowering to obtain higher yields of artemisinin or could be allowed to attain maturity to obtain valuable yields of volatiles.

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