Research Articles (Chemistry and Polymer Science)

Butenolides from plant-derived smoke : natural plant-growth regulators with antagonistic actions on seed germination

Light, Marnie E. Burger, B. V. Staerk, Dan Kohout, Ladislav Van Staden, Johannes (American Chemical Society and American Society of Pharmacognosy, 2010-01)

Smoke plays an intriguing role in promoting the germination of seeds of many species following a fire. Recently, a bicyclic compound containing a condensed butenolide moiety, 3-methyl-2H-furo[2,3-c]pyran-2-one (1), was ...

Thermal modulator array for analyte modulation and comprehensive two-dimensional gas chromatography

Burger, B. V. Snyman, Tertia Burger, Wina J. G. Van Rooyen, Willie F. (Wiley-VCH Verlag, 2003-01)

Segmented thermal modulators were fabricated for the modulation of column effluent in one-dimensional gas chromatography, comprehensive two-dimensional gas chromatography, and as sample introduction devices in other ...

Semiochemicals of the Scarabaeinae, III : identification of the attractant for the dung beetle Pachylomerus femoralis in the fruit of the Spineless monkey orange tree, Strychnos madagascariensis

Burger, B. V. Petersen, W. G. B. (Dieterich'sche Verlagsbuchhandlung, Wiesbaden (now Mainz), 1991-04)

Following the observation that the non-ball-rolling dung beetle Pachylomerus femoralis (Kirby) rolled the flesh-covered seeds from the fruit of the spineless monkey orange tree, Strychnos madagascariensis Poiret, an ...

Pheromones of the Scarabaeinae, II : composition of the pheromone disseminating carrier material secreted by male dung beetles of the genus Kheper

Burger, B. V. Munro, Zenda Brandt, W. F. (Dieterich'sche Verlagsbuchhandlung, Wiesbaden (now Mainz), 1990-01)

Gel electrophoresis of the white flocculent pheromone disseminating secretions produced by males of the three dung beetle species, Kheper lumarcki, K. nigroacneus and K. subaeneus, revealed that three different proteins ...

Mammalian pheromone studies - III : (E,E)-7,11,15-trimethyl-3methylenehexa-deca-1,6,10,14-tetraene, a new diterpene analogue of ß-farnesene from the dorsal gland of the springbok, Antidorcas marsupialis

Burger, B. V. Le Roux, Maritha Spies, H. S. C. Trutor, Verona Bigalke, R. C. (Elsevier, 1978)

The secretions produced by the cutaneous glands of mammals are generally considered to be involved in conspecific chemical communication, acting as pheromones. From a review of mammalian chemical ecology it appears that, ...

Headspace analysis : a novel method for the production of capillary traps with ultra-thick stationary phase layers

Burger, B. V. Le Roux, Maritha Burger, Wina J. G. (John Wiley & Sons, 1990-11)

The development by Grab and Habaich of a headspace analytical technique which organic volatiles are trapped in short capillary traps coated with a layer of fine activated charcoal particles (COTs) or a layer of a suitable ...

Avian exocrine secretions. I : chemical characterization of the volatile action of the uropygial secretion of the green woodhoopoe, Phoeniculus purpureus

Burger, B. V. Reiter, B. Borzyk, O. Du Plessis, M. A. (Springer Verlag, 2004-08)

Using gas chromatography–mass spectrometry in conjunction with auxiliary techniques such as solid phase microextraction and determination of double bond positions by means of dimethyl disulfide derivatization, 45 ...

Asikliese karbeenkomplekse maak eerste opslae in goudstormloop

Raubenheimer, Helgard G. (LitNet Academic, 2012-12)

OPSOMMING: Die eerste karbeenkomplekse van goud is reeds in 1971 deur Bonati en Minghetti gerapporteer. Verdere ontwikkelings na die 1980’s was stadig. Sedert 2007, toe die belangstelling in goudchemie reeds geweldig ...

Semiochemicals of the Scarabaeinae VII : identification and synthesis of EAD-active constituents of abdominal sex attracting secretion of the male dung beetle Kheper subaeneus

Burger, B. V. Petersen, W. G. B. Weber, W. G. Munro, Z. M. (Springer Verlag, 2002-12)

Using gas chromatography with flame ionization detection (FID) and electroantennographic detection (EAD) in parallel, butanoic acid, skatole, and (E)-2,6-dimethyl-6-octen-2-ol were identified as constituents of the abdominal ...

The defouling of membranes using polymer beads containing magnetic micro particles

McLachlan, David (Water Research Commission (WRC), 2010-10)

Polymer membranes provide a good method of obtaining potable water but, as membranes always foul during water purification, the flux drops with time. Methods of physical cleaning of the polymer membranes, which do not ...

A comparative study of regenerated bamboo, cotton and viscose rayon fabrics. Part 1 : Selected comfort properties

Gericke, Adine Van Der Pol, Jani (South African Association of Family Ecology and Consumer Sciences (SAAFECS), 2010)

ENGLISH ABSTRACT: Regenerated bamboo, also known as bamboo viscose, is a man-made cellulose fibre that has recently appeared on the market as an apparel and home-furnishing textile. The products are marketed as having ...

Characterization of volatiles and aroma-active compounds in honeybush (Cyclopia subternata) by GC-MS and GC-O analysis

Le Roux, Maritha. Cronje, J. Christel Burger, B. V. Joubert, Elizabeth (American Chemical Society, 2012-03)

Volatile organic compounds (VOCs) in fermented honeybush, Cyclopia subternata, were sampled by means of a high-capacity headspace sample enrichment probe (SEP) and analyzed by gas chromatography-mass spectrometry (GC-MS). ...

Olfactory cue mediated neonatal recognition in sheep, Ovis aries

Burger, B. V. Viviers, Marlize Z. Le Roux, Neil J. Morris, John Bekker, Jan P. I. Le Roux, Maritha (Springer Verlag, 2011-10)

The strong bond between ewe and lamb formed shortly after parturition is an important factor in lamb survival. Evidence exists that a ewe can distinguish her lamb by its unique smell, but the constituents of such a putative ...

Lizard epidermal gland secretions II : chemical characterization of the generation gland secretion of the sungazer, Cordylus giganteus

Louw, Stefan Burger, B. V. Le Roux, Maritha Van Wyk, Johannes H. (American Chemical Society and American Society of Pharmacognosy, 2011-06)

In lizards, the epidermal glands of the femoral and precloacal regions are involved in the production of semiochemicals. In addition to its femoral glands, the giant girdled lizard, or sungazer, Cordylus giganteus, which ...

Headspace gas analysis : quantitative trapping and thermal desorption of volatiles using fused-silica open tubular capillary traps

Burger, B. V. Munro, Zenda (Elsevier, 1986)

A system has been devised with which volatiles can be effectively trapped from headspace gas samples at relatively high flow-rates. Material is trapped in fused-silica capillary traps, 1 m in length, and coated with either ...

Simplified analysis of organic compounds in headspace and aqueous samples by high-capacity sample enrichment probe

Burger, B. V. Marx, Brenda Le Roux, Maritha Burger, W. J. G. (Elsevier, 2006-07)

A sample enrichment probe (SEP) consisting of a thin rod of an inert material and provided at one end with a short sleeve of polydimethylsilicone rubber was used for the high-capacity sample enrichment of analytes from ...

Semiochemicals of the Scarabaeinae VIII : identification of active constituents of the abdominal sex-attracting secretion of the male dung beetle, Kheper bonellii, using gas chromatography with flame ionization and electroantennographic detection in parallel

Burger, B. V. Petersen, W. G. B. Ewig, B. T. Neuhaus, J. Tribe, G. D. Spies, H. S. C. Burger, W. J. G. (Elsevier, 2008-04)

Using gas chromatography with flame ionization detection and electroantennographic detection in parallel (GC-FID/EAD), the active constituents of the sex attractant of male dung beetles of Kheper bonellii were located in ...

Mammalian exocrine secretions : X. Constituents of preorbital secretion of grysbok, Raphicerus melanotis

Burger, B. V. Tien, F-C. Le Roux, M. Mo, W-P. (Springer Verlag, 1996-04)

Using electron impact and chemical ionization mass spectrometry with methane and nitric oxide as reactant gases in conjunction with mass spectral analysis of the dimethyl disulfide derivatives of unsaturated constituents, ...

Mammalian exocrine secretions XI. Constituents of the preorbital secretion of klipspringer, Oreotragus oreotragus

Burger, B. V. Yang, T-P. Le Roux, M. Brandt, W. F. Cox, A. J. Hart, P. F. (Springer Verlag, 1997-10)

The ketones 3-pentanone, 4-methyl-2-pentanone, 5-methyl-3-hexanone, 4-methyl-3-hexanone, and the esters ethyl propaneate, 2-methylpropyl acetate, ethyl 3-methylbutanoate, and 2-methylpropyl propanoate were identified as ...

Mammalian exocrine secretions IX : constituents of preorbital secretion of oribi, Ourebia ourebi

Mo, W.-P. Burger, B. V. Le Roux, M. Spies, H. S. C. (Springer Verlag, 1995-08)

Using gas chromatography-mass spectrometry in conjunction with ancillary techniques such as chemical ionization with different reactant gases, determination of the position of double bonds by means of dimethyl disulfide ...

Research Articles (Chemistry and Polymer Science)

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