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Enantioenriched, highly functionalized cyclopropane derivatives were prepared by a simple and green approach using monosaccharide‐based chiral crown ethers as phase transfer catalysts. The Michael‐initiated ring closure (MIRC) reactions of diethyl bromomalonate with 2‐cyano‐3‐phenylacrylate took place with complete diastereoselectivity in the presence of chiral lariat ethers derived from carbohydrates...
The effect of viscosity change of solder pastes during stencil printing on the pressure distribution along the stencil line and on the results of numerical modelling is investigated. Rheological properties of Type 4 SAC305 (Sn96.5Ag3Cu0.5) solder paste were measured for several cycles in our previous work, to investigate the viscosity change of pastes during stencil printing. Parameters of the Cross...
Adult female rats were treated subcutaneously (sc) with zinc chloride (ZnCl, 10 or 20 mg kg body weight, bw) four times during two ovarian cycles. The third injection was accompanied by cadmium chloride (CdCl) administration sc (2.5, 5 and 10 mg kg bw). The fourth zinc (Zn) treatment was followed by mating. ZnCl (20 mg kg) itself impaired fertility by 20%, while CdCl dose-dependently blocked the receptivity...
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