the process of ethylene production from ethane dehydrogenation is one of the interesting processes in the field of conversion the petroleum light gases to the valuable products. in this process, the outlet gaseous product is a combination of ethylene, ethane and hydrogen. effective separation techniques are required for separation of ethylene from unreacted ethane. here a new adsorbent approach...

Triptycene-derived macrotricyclic polyether containing an anthracene unit is a powerful host for 1,2-bis(pyridium)ethane, diquat and 2,7-diazapyrenium salt with association constants of the 1 : 1 complexes at >10(5) M(-1). Crystal structures showed that π-π stacking interactions between the host and the guests play an important role in the formation of the stable complexes.

1. Ligated intestinal segments from rats treated with disodium ethane-1-hydroxy-1,1-diphosphonate (EHDP) at the daily dose of 16 mumol (identical to 1 mg of phosphorus)/kg subcutaneously for 7 days show an increased rate of calcium absorption. 2. This dose of EHDP enhances the intestinal accumulation of a vitamin D3 metabolite with the chromatographic characteristics of 1,25-dihydroxycholecalci...

Two extractants, N,N′-((octylazanediyl)bis(ethane-2,1-diyl))dioctanamide (LI) and N,N′-((octylazanediyl)bis(ethane-2,1-diyl))di-2-methylheptanamide (LII), have been synthesised in two steps starting from diethylenetriamine involving a peptide coupling step. The efficiency selectivity of the extractants dodecane/octanol (95/5 v/v) toward extraction uranium sulfate media investigated showing that...

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Herbicide, Diphenyl Ether, Peroxidation, Antioxidants Measurements of ethane and ethylene as indices o f in vivo lipid peroxidation and o f chemicallyinduced stress, respectively, were done on mustard seedlings (Sinapis alba), treated with oxyfluorfen[2-chloro-l-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene]. When seedlings were exposed to low light intensity o f 14 W /m 2, only stress-e...

In the title compound, C(10)H(11)ClO(3), obtained by the reaction of 2,4-dihy-droxy-acetophenone, potassium carbonate and 1-bromo-2-chloro-ethane, an intra-molecular O-H⋯O hydrogen bond occurs.

[1] Airborne whole air samples collected over the western Pacific in spring, 2001 showed depletion of tetrachloroethene (C2Cl4) in every upper tropospheric (UT) air parcel that had interacted with large areas of cirrus less than three days upwind. The amount of C2Cl4 depletion showed a negative correlation with time since the interaction, consistent with the C2Cl4-depleted air parcels mixing wi...