نتایج جستجو برای: chiral auxiliaries
تعداد نتایج: 38094 فیلتر نتایج به سال:
OBJECTIVE To explore what domains of work are important for job satisfaction among doctors, nurses and auxiliaries and to discuss differences between professional groups in the perspective of micro team culture. DESIGN Cross-sectional survey data from hospital staff working clinically at inpatient hospital wards in Norway in 2000. MEASURES Linear regression models predicting job satisfactio...
Abstract Enantiomerically pure α-substituted β-hydroxyesters are important chiral building blocks for ligands, auxiliaries and β-lactam antibiotics. A two-step chemo-enzymatic procedure using lipase as biocatalyst is an efficient way to synthesize such products. To date, the methods described limited molecules that do not contain a center adjacent racemic carbinol, furthermore, they acylation. ...
Effective methodologies for efficient preparation of semicarbazones from aldehydes or ketones via milling and the subsequent regeneration of the parent carbonyls by gaseous nitrogen dioxide are described under solid-solid and gas-solid reaction conditions, respectively. These methods are fast, simple and environmentally benign which do not require the use of any auxiliaries such as catalyst...
an important property of electromagnetic fields, which arises from the interaction between fields and chiral molecules, is called optical chirality. by enhancing this field property, while maintaining constant input power, we are able to increase absorption of circularly polarized light by chiral molecules of a certain handedness. this enhancement is achieved through the use of achiral plasmoni...
The evidential meaning traditionally attributed to modal auxiliaries is conveyed in Italian and Greek by complex constructions clustering both modal and aspectual features. The evidential reading of Italian and Greek modal auxiliaries, indeed, is only licenced when the modals take as complements stative, progressive, habitual or resultative subordinates. A feature of aspectual incompleteness of...
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