The complex nature of botanicals and essential oils makes it difficult to identify all of the constituents by gas chromatography/mass spectrometry (GC/MS) alone. In this paper, automated sequential, multidimensional gas chromatography/mass spectrometry (GC-GC/MS) was used to obtain a matrix-specific, retention time/mass spectrometry library of 190 juniper berry oil compounds. GC/MS analysis on ...

Two aromatics-rich distillates R1 and R2 with different properties from naphthenic base vacuum gas oil were used for preparing mesophase pitch through high-pressure thermal treatment. 1H-NMR, FT-IR and VPO were employed to characterize the structural parameters of the raw materials. The products' optical texture and molecular structure were analyzed by polarized light optical microscopy, 1H-NMR...

Quantum cryptography is a knowledge that guarantees ultimate safety. Associated to present cryptography that might be overcome by the expansion of an ultra-high-speed computer, quantum cryptography safeguards secure message since it is founded on the important bodily laws. It is an emergent technology in which two parties may concurrently produce shared, secret cryptographic key substantial usi...

A sensitive and precise method for the determination of trace amounts of total sulfur in organic mixtures is described. With this method bonded sulfur is reacted with activated Raney nickel and is reduced to nickel sulfide at 70 °C. Then, the residue is separated on a filter paper and pyrolysed by induction furnace technique for generation of SO2 which is then detected by a non-dispersive gas d...

Hans-Peter Hanssen Lehrstuhl für Pharmakognosie, Bundesstraße 43, D-2000 Hamburg 13, Bundesrepublik Deutschland and Wolf-Rainer Abraham Gesellschaft für Biotechnologische Forschung mbH (G BF), Mascheroder Weg 1, D-3300 Braunschweig, Bundesrepublik Deutschland Z. Naturforsch. 41c, 959—962 (1986); received July 7, 1986 Lentinellus cochleatus, Basidiomycotina, Liquid Cultures, Fungal Volatiles, Fu...

The oxidation state of traditional fish products was measured by determining the malondialdehyde (MDA) level by HPLC and the results were compared to those given by a spectrophotometric method. The procedure involves oxidation of the products by incubation at 40 degrees C for 3 d. Samples were steam distilled in a Kjeldahl distillation apparatus and the MDA was determined in the aqueous distill...

A study of the influence of distillation system, oak wood type, and aging time on volatile compounds of cider brandy was carried out. Acetaldehyde and acetaldehyde diethyl acetal were influenced by distillation technology, oak wood type, and maturation time. The majority ester, ethyl ethanoate, increased during aging, the highest level of this ester being detected in spirits distilled by double...

The corrosion inhibition reaction of plant distillates and their synergistic combination effect was studied. Atlas cedarwood distillate (ACW), admixture sage Jojoba (SJA), jojoba lavender (JLD) were evaluated at minimal concentrations to for on mild steel in 1 M H 2 SO 4 solution. Results showed ACW reacted poorly 1% 2% inhibitor concentration. However, from 3% - 6% concentration the final rate...

the oil refining industries are using a number of demulsifiers for dewatering and desalination of crude oil but experience has shown that universal demulsifiers can not be produced. each kind of water in oil (w/o) emulsion requires specific by composition demulsifier. in practice, synergetic effect of the interaction between different types of demulsifiers is often sought. for dewatering the w...