Photoswitchable molecules are able to isomerize between two metastable forms through light stimuli. Originally being studied by photochemists, this type of molecule has now found a wide range of applications within physics, chemistry and biology. The extensive usage of photochromic molecules is due to the two isomers having fundamentally different physical and chemical properties. The most impo...

Antibubbles are ephemeral objects. Their lifetime is driven by the slow drainage of the air shell from the bottom to the top of the antibubble under the action of hydrostatic pressure. We show in this paper that this argument is only valid if the water used to make the surfactant mixture is saturated in air. Otherwise, two paths are used by the air, which conduct to the thinning and the eventua...

By microbial transformation of tylosin (I), the following eight new acyl derivatives were obtained: 3-acetyltylosin (II), 3-propionyltylosin (III), 4"-butyryltylosin (IV), 4"-isovaleryltylosin (V), 3-acetyl-4"-butyryltylosin (VI), 3-acetyl-4"-isovaleryltylosin (VII), 3-propionyl-4"-butyryltylosin (VIII) and 3-propionyl-4"-isovaleryltylosin (IX).

The structure of physiologically active substances, actinopyrones A, B and C, produced by Streptomyces pactum S12538 were determined on the basis of their spectral and chemical character. These substances were structurally related to piericidin A1.

This paper reports on the indoor and outdoor air quality in informal urban rural settlements Kenya. The study is motivated by need to improve consciousness understand harmful health effects of vulnerable people, especially poor communities. Ng’ando settlement Leshau Pondo village Kenya are selected as representative neighborhoods where unclean energy sources used for cooking, lighting heating. ...

Online-characterization of carbonaceous nanoscaled particles is important in different application fields, e.g., in carbon black production or in automobile raw exhaust. For the determination of mass concentration and primary particle size respectively specific surface area, a possible in situ measurement technique is time-resolved laser-induced incandescence (TIRE-LII). The basic principle of ...

Abstract—Developing complete mechanistic models for polymerization reactors is not easy, because complex reactions occur simultaneously; there is a large number of kinetic parameters involved and sometimes the chemical and physical phenomena for mixtures involving polymers are poorly understood. To overcome these difficulties, empirical models based on sampled data can be used instead, namely r...

OBJECTIVE To evaluate the effect of intracutaneous injections of botulinum toxin type A on excessive focal hyperhidrosis. DESIGN Therapeutic before-and-after trial over 4 months. SETTING Neurological and dermatological university departments. PATIENTS Eleven patients with excessive axillary, palmar, or plantar hyperhidrosis fulfilling the following criteria: (1) local and systemic drug th...