Preparative isolation and purification of six volatile compounds from essential oil of Curcuma wenyujin using high-performance centrifugal partition chromatography doc
... Article
Preparative isolation and purification of six
volatile compounds from essential oil of
Curcuma wenyujin using high-performance
centrifugal partition chromatography
Six volatile compounds, ... (4), 1,8-
cineole (5) and b-elemene (6), were successfully isolated from the essential oil of Curcuma
wenyujin by high-performance centrif...
...
from the inhabitants of the halls concerning strange odours from the site. There is also fear of potential
hazards of explosion, asphyxiation and toxicity from methane, carbon dioxide, and volatile ...
Figure 3. Graph of frequency against range of values of age of landfill (t)
Figure 4 represents range of values of the total annual mass emission rate of no...
...
Results and discussion
The essential oil was light yellow and the
total yield of 1.23%. The chemical composition
of the leaf essential oils of investigated species
collected in October 1991 and ... β-
phellandrene (70.7%) and the ratio of α-
phellandrene and β-phellandrene was 5.73.
Table 1. The composition of leaf essential oil of
Machilus japonica Siebo...
... and
pathos, and filled with the tenderest feeling of sympathy, which will go straight to the
heart of every lover of the ideal in the world of humanity, and every worshipper in the
world of ... upon the iron rails and thou seest a well-known eye that would
recognize thee, stretch out thy hand and try to grasp the hand of a friend, and perhaps
thou wilt understand...
... lifted one side of my hat and out darted one of the birds; then I lifted the hat
from the other. One of the females then rushed, apparently with notes of joy and
congratulation, to one of the males, ... and the
spell of winter is thoroughly broken, and the remembrance of it afar off.
One of the most graceful of warriors is the robin. I know few prettier sights t...
... Europe and is
able to take its blood meal from a variety of verte-
brates, ranging from amphibians to mammals, and
including domestic animals and humans [2]. It is the
one of the vectors of Borrelia ... retro-orbital puncture of six randomly
chosen mice for cytokine analysis (MCP-1, TNF-a, IL-6,
IL-10, IL-1b). All animals were maintained and handled
according to local a...
... injecting 3 lL of variable amounts of
venom and/ or fractions at the intersegments of the right leg.
Phaiodotoxin in amounts of 0.2, 0.5, 0.8 and 1.0 lgof
peptide per animal were injected, using two ... long-chain sub-
family of scorpion peptides. S everal genes coding for t his
peptide and similar ones were cloned by PCR, using cDNA
prepared from the RNA of venomous gl...
... to
identify and quantify the amount of 2-AP and other volatile compounds 2-AP extracted from pandan leaves was used
as standard. Results indicated that 2-AP and other volatile compounds clearly ... (b), and mature leaf (c)
Fig 1. Three types of Pandan leaves: old
leaf (a), young leaf (b), and mature leaf (c)
For the identification and quantification
of change...
...
experiments.
Extraction of extracellular polymer from activated sludge floc.
Six hundred milliliters of activated sludge was washed 5 times with distilled water, and
Journal of Water and Environment ... follows: 500 g of
soil was washed 3 times with distilled water and suspended in 1,000 ml of water. The
mixture was allowed to stand for 10min and the supernatant w...