Plant roots exudates influenced root-knot nematodes egg hatch, as root exudates of resistance tomato cultivars were known to produce higher amount of compounds associated with resistance, which included heptadecane, tridecane, tetradecane
, hexadecane, pentadecane, hexatriacontane, hexadecane, 2,6,10,14-tetramethyl, octadecane, nonadecane, eicosane and heneicosane against Meloidogyne incognita(Yang et.
The PCM tests show that the technical grade n-tetradecane maintains a sharp freeze point temperature, but that the freeze point is depressed from 5.6[degrees]C (42.1[degrees]F) for pure tetradecane
to ~ 4[degrees]C (~39.2[degrees]F) for our technical grade product.
Of the three hydrocarbons, in nymphs poor positive attraction (+0.02) was observed for tetradecane
on the contrary overall repellency was found (Table 5).
Among them the liquid alkanes (undecane dodecane tridecane tetradecane
pentadecane hexadecane heptadecane etc.) are widely used in fuel oils and as anti-corrosive agents in lubricating oils and solid alkanes (octadecane nonadecane eicosane heneicosane tricosane tetracosane heptacosane octacosane etc.) find their use in paraffin waxes of different kinds.
The peak areas of all the components with retention times less than that of tetradecane
or diethyl adipate are integrated to determine the amount of VOC content.
is chosen due to its freezing point being suitable for chilled water storage systems (~ 5.6[degrees]C, ~42[degrees]F), high heat of fusion (~200kJ/kg, ~86 BTU/[lb.sub.m]), and the lack of a subcooling requirement for freezing.
The chromatogram also showed the presence of other minor compounds such as octadecane (0.29%), naphthalene (0.13%), tetradecane
(0.41%), pentadecane (0.58%), hexadecane (1.02%), heptadecane (0.53%), and cholesterol (5.07%) (Table 2).
An organic phase was dissolved in hexane/ethyl acetate (proportion of 1:1) which contained tetradecane
as internal standard, and the injection was carried out into the GC (FREITAS et al., 2009).
The [V.sup.E.sub.m] curve for the mixture of noctane and octan-2-ol is sigmoidal and tends to change to positive values at higher mole fractions ([x.sub.1] [greater than or equal to] 0.65) of noctane while [V.sup.E.sub.m] values for n-decane, n-dodecane, and n tetradecane
with octan-2-ol mixtures showpositive deviation over the entire composition range.
Common secondary metabolites present in leaf tissue and leaf calluses were toluene, a-sphinosterol, quercetin, tetradecane
, pentadecane, hexadecane, octadecane, hentriactone and 9,12-octadecadienoicacid[7,7] (Table II).
leucocephala and P africana includes; tetradecane
, hexadecane and heptadecane.
Among secondary metabolites determined, the common secondary metabolites present in leaf and internode tissue were Toluene, a-sphinosterol, Tetradecane
, Pentadecane, Hexadecane, Octadecane, Hentriactone, and 9,12-Octadecadienoicacid[7,7].
A spectrometric analysis shows that this product is a mixture of five paraffins: tetradecane
(33%), pentadecane (43%), hexadecane (17%), heptadecane (5%) and octadecane (2%).
Compound Target Range (/[m.sup.3]) Ethylbenzene < 4000 Xylene < 900 Tetradecane
< 350 Toluene < 270 Styrene < 250 Dibutylhthalate < 240 Diethlhexylphthalate < 130 Formaldehyde < 100 Acetaldehyde < 50 Table 9.