PubMed Health⌕ Search

Biomedical subjects

C Vogel

Publications and source records attributed to C Vogel.

14 recordsLinked to original sources
PubMed1992

D-galacturonic acid derivatives as acceptors and donors in glycosylation reactions.

Jones oxidation of suitably protected allyl beta-D-galactopyranosides and subsequent esterification were reinvestigated. Partial deprotection of the resulting D-galacturonic acid derivatives afforded compounds suitable for transformation into glycosyl acceptors. The synthesis of 2-, 3-, and 4-trityl ethers, relying on efficient differential protecting-group strategies, is described. Trityl-cyanoethylidene condensation of these trityl ethers, leading to the protected disaccharide units beta-D-GalpA-(1-->2)-D-GalpA and beta-D-GalpA-(1-->3)-GalpA with high stereoselectivity, is demonstrated. A beta-D-GalpA-(1-->4)-D-GalpA disaccharide was also prepared.

Carbohydrate Sequence↗
PubMed1992

Synthesis of a heteroglycuronan derivative containing the beta-D-galactopyranosyluronic acid (1-->3)-L-rhamnose repeating unit.

Helferich glycosylation of the cyanoethylidene L-rhamnose derivative 3 with the galactosyluronic bromide 2 gave the disaccharide 4 as a key intermediate in the synthesis of the monomer 13 for trityl-cyanoethylidene condensation (TCC). The following formation of the monomer 13, including introduction of a trityl group at O-3', proceeded in six steps. Because of the difficulty of some steps, an alternative route for 13 was tested. Model compounds 20, 21, and 22 were synthesized in order to confirm the stereoregularity of the products of the polycondensation. The polycondensation of the monomer gave D-GalpA-(1-->3)-L-Rha-oligomer derivatives consisting mainly of three repeating units. This result is in contrast with the degree of polymerisation (dp > or = 22) of other synthetic rhamnans, but is very similar to dp 2-7 of homo- and hetero-glucuronan derivatives.

Carbohydrate Sequence↗
PubMed1979

[Liability claims for prosthetic treatment].

Liability claims of 153 patients receiving prosthetic treatment were organized according to damage and were discussed on the basis of the known decisions and judgements of the courts.

Crowns↗
PubMed1979

[Dental injuries during general anaesthesia and their forensic consequences (author's transl)].

145 dental injuries in 83 patients occuring during general anaesthesia are classified on the basis of the material from a liability insurance company. These mainly affected the upper incisors. In childhood only luxations occured, in other ages no characteristic distribution of different types of damage could be found. Besides intubation, 20 per cent of injuries were caused by Guedel oral airways. Damage to teeth is the main cause of claims in tort from its total number. Damage of healthy teeth generally is due to carelessness, whereas an injury to teeth damaged by other reasons before administration of general anaesthesia causes liability of the anaesthesiologist because of inadequate examination and exploration.

Anesthesia, General↗
PubMed1977

A comparison of cyclophosphamide, adriamycin, 5-fluorouracil (CAF) and cyclophosphamide, methotrexate, 5-fluorouracil, vincristine, prednisone (CMFVP) in patients with metastatic breast cancer: a Southeastern Cancer Study Group project.

In an ongoing prospective randomized study, 113 evaluable patients have received either a three-drug combination that included cyclophosphamide, Adriamycin and 5-fluorouracil (CAF) or a five-drug combination including cyclophosphamide, methotrexate, 5-fluorouracil, vincristine and prednisone (CMFVP) given intermittently 1 week out of 4. Responses (64%), median duration of response (32 weeks), and median duration of disease control (32 weeks) achieved with CAF were superior to those achieved with CMFVP (37%, 22 weeks, 17 weeks, respectively). Morbidity secondary to CAF was significant, with nausea and vomiting, malaise, total alopecia, and granulocytopenia being the main features.

Agranulocytosis↗
PubMed1976

[Investigations concerning serum concentration and temperature following oral application of a new paracetamol preparation (author's transl)].

A new, highly concentrated, fluid paracetamol preparation (paracetamol fluid) was tested on 26 small children and school children. The children were divided into 3 groups on the basis of dosage (5, 10 and 20 mg/kg body weight). The paracetamol serum concentration was determined and the temperature reactions noted. The resorption was rapid; maximum serum level was usually reached after 30 minutes. In most cases, maximum drop in temperature, however, occurred in 3-4 hours. The most obvious and longest lasting drop in temperature was achieved fol following 20 mg/kg body weight dose of the paracetamol preparation. Doses of 5 mg/kg body weight had no significant affect on elevated body temperatures. The most favorable dosage then is between 10-20 mg/kg body weight. The paracetamol concentration in the children under study never exceeded that of 20 mug/ml, even with the higher doses (20 mg/kg). This is far below the toxic threshold of 120 mug/ml. Even higher paracetamol doses of 40 mg/kg body weight, such as may be acciddentally administered, only resulted in a maximum serum level of 50 mug/ml and, therefore, were far below the toxic threshold.

Acetaminophen↗