Biomedical subjects

H Adolfsson

Publications and source records attributed to H Adolfsson.

3 recordsLinked to original sources

PubMed2001

Olefin epoxidation with bis(trimethylsilyl) peroxide catalyzed by inorganic oxorhenium derivatives. Controlled release of hydrogen peroxide.

The replacement of organometallic rhenium species (e.g., CH(3)ReO(3)) by less expensive and more readily available inorganic rhenium oxides (e.g., Re(2)O(7), ReO(3)(OH), and ReO(3)) can be accomplished using bis(trimethylsilyl) peroxide (BTSP) as oxidant in place of aqueous H(2)O(2). Using a catalytic amount of a proton source, controlled release of hydrogen peroxide helps preserve sensitive peroxorhenium species and enables catalytic turnover to take place. Systematic investigation of the oxorhenium catalyst precursors, substrate scope, and effects of various additives on olefin epoxidation with BTSP are reported in this contribution.

Alkenes↗

PubMed2000

Efficient epoxidation of alkenes with aqueous hydrogen peroxide catalyzed by methyltrioxorhenium and 3-cyanopyridine.

The epoxidation of alkenes with 30% aqueous hydrogen peroxide is catalyzed efficiently by methyltrioxorhenium (MTO) in the presence of pyridine additives. The addition of 1-10 mol % of 3-cyanopyridine increases the system's efficiency for terminal and trans-disubstituted alkenes resulting in high isolated yields of the corresponding epoxides. The system allows for epoxidation of alkenes with various functional groups. Alkenes leading to acid-sensitive products are efficiently epoxidized using a mixture of pyridine and 3-cyanopyridine as additives. This method is operationally very simple and uses an environmentally benign oxidant. The effects of different pyridine additives on the alkene conversion and the catalyst lifetime are discussed.

Alkenes↗

PubMed1997

Nursing process documentation--effects on workload and quality when using a computer program and a key word model for nursing documentation.

In 1993 the federation of County Councils commissioned Spri to carry out a broadly based study aimed at investigating individualised patient care as described in the notes kept at various care units using computers to support documentation of the nursing process. The wards involved in the study represented various disciplines such as surgery, obstetrics, internal medicine, geriatrics and psychiatry. During the study period certain measures designed to improve the documentation were implemented i.e. a special computer program and structured nursing documentation following the VIPS-model. Interviews with staff at the units confirm that the introduction of computers, in combination with the structure of the VIPS-model and training in nursing documentation, has made changes possible to working procedures and brought greater goal orientation to the activity of care. The overall examination of the nursing entries in the patients' notes showed that the language has improved. The entries were to a greater extent expressed clearly and distinctly.

Computer User Training↗