In this study, the efficiency of a clean-up method by gel permeation chromatography (GPC) for the separation of pesticides from lanolin is analyzed. The pesticides analyzed belong to two different families, organophosphorous and synthetic pyrethroids. Lanolin, a standard mixture of the pesticides, and a lanolin-pesticides mixture are injected in a GPC column. The recoveries and elution times fr...

Many dermatologists have in the past studied the phenomenon of eczematous hypersensitivity of the human skin to lanolin (wool fat) (1—6). The reasons for this continuing interest are clear. Lanolin hypersensitivity is of practical im portance because of the very wide-spread modern use of this valuable substance in topical medicaments like ointments, pastes and emulsions, in cosmetics of many ki...

Oil-in-water nanoemulsions are stable systems with droplet sizes in the 20-200 nm range. The physicochemical properties of these systems may be influenced by the addition of additives. Thus, the influence of ethoxylated (EL) and acetylated lanolin (AL) addition on the droplet size, pH values, electrical conductivity and stability of nanoemulsions was investigated. Then, effect of nano-emulsions...

In the course of their work on the carcinogenic action of oils and tars on mouse's skin, Twort and Twort (4,5) observed that addition of anhydrous lanolin often led to a reduction in neoplastic response. The inhibitory effect was greater than that obtained with benzene as diluent, and also occurred when lanolin was applied separately to the skin during the intervals between paintings. In view o...

The fact described in the preceding paper (9), tl'tat methylcholanthrene dissolved in anhydrous lanolin fails to produce a carcinogenic effect and does not even induce early skin changes such as epilation, epidermal hyperplasia, destruction of sebaceous glands, and diminution in the calcium and iron content of the epidermis, has been established in 4 experimental series comprising 312 mice. Sin...

In this paper the efficiency of a method for the separation and identification of pesticides in lanolin is presented. Theses pesticides belong to the organophosphorous and synthetic pyrethroids families. After the gel permeation chromatography, pesticides are separated from lanolin into two fractions corresponding to the two families, which simplify subsequent analysis by gas chromatography.

Lanolin is frequently used as a diluent for applying growth substances 'to plants. Its earliest use was described by LAIBACH (1). He applied unilaterally, to the first internodes of Phaseolus multiflorus seedlings, a lanolin paste containing the test substance. The presence of growth substances induced negative stem curvatures. Subsequently, Laibach and co-workers (2, 3) applied lanolin pastes ...

BACKGROUND Sore nipples are common during lactation and remain the major reason for failing to establish successful breastfeeding. To formulate a peppermint gel and to evaluate its effect on the prevention of nipple crack associated with breast-feeding, a randomized double-blinded clinical trial comparing the above formulation with modified lanolin and a neutral ointment was carried out. MATE...