TY  - JOUR
A1  - Nokihara, Kiyoshi
A1  - Berndt, Heinz
T1  - Studies on sulfur-containing peptides : tert-butyloxycarbonylsulfenyl and benzyloxycarbonylsulfenyl derivatives as protecting groups for cysteine
JF  - The journal of organic chemistry
Y1  - 1978
U6  - https://doi.org/10.1021/jo00419a046
SN  - 0022-3263
VL  - 43
IS  - 25
SP  - 4893
EP  - 4895
PB  - American Chemical Society
CY  - Washington
ER  - 
TY  - JOUR
A1  - Kalbe, Jochen
A1  - Höcker, Hartwig
A1  - Berndt, Heinz
T1  - Design of enzyme reactors as chromatographic columns for racemic resolution of amino acid esters
JF  - Chromatographia
Y1  - 1989
SN  - 0009-5893
U6  - https://doi.org/10.1007/BF02319646
VL  - 28
IS  - 3-4
SP  - 193
EP  - 196
ER  - 
TY  - JOUR
A1  - Porschen, W.
A1  - Gartzen, J.
A1  - Gewehr, K.
A1  - Mühlensiepen, H.
A1  - Weber, Hans-Joachim
A1  - Feinedegen, L E.
T1  - In vivo assay of the radiation sensitivity of hypoxic tumour cells : influence of γ-rays, cyclotron neutrons, misonidazole, hyperthermia and mixed modalities
JF  - The British journal of cancer / Supplement
N2  - Tumour cell death can be evaluated in the living mouse by externally measuring the rate of loss of tumour-bound DNA tracer. By sequentially labelling the tumour-bearing animals with ¹²⁵IUdR and ¹³¹IUdR 50 h apart, the average tumour cells at the time of the second injection are labelled by ¹²⁵IUdR and the euoxic tumour cells are specifically labelled with ¹³¹IUdR. Tumour treatment at this stage of labelling permits the observation of the reaction of euoxic cells and average tumour cells and finally yields data on hypoxic cells and thus on the oxygen enhancement ratio. This information adds to results from tumour control and growth delay.

With this technique effects were analysed of 60-Co γ-rays, cyclotron neutrons (E = 6 MeV), misonidazole (500 mg/kg body wt) and hyperthermia (42°C water-bath), or combinations of these.

Misonidazole (15 min before irradiation) altered the oxygen enhancement ratio by a factor of 1·5 for γ-rays and of 1·1 for neutrons; when evaluated from tumour-growth delay and TCD-50 misonidazole gave a dose modifying factor of 1·47 for γ-rays and of 1·2-1·3 for neutrons.

Based on percentage tumour regression 100 days after treatment, the enhancement ratio from hyperthermia (after irradiation) was 2·75 for γ-rays (at 10 Gray) and 2·2 for neutrons (at 3·2 Gray). For neutrons combined with misonidazole and hyperthermia the ratio was 2·4.

These results demonstrate that effects of neutron irradiation may be modified by electron-affinic substances and/or hyperthermia.
Y1  - 1978
SN  - 0306-9443
N1  - Section 6: Sensitization and Hypoxic Cytotoxicity: Effects of Hyperthermia and High Let
IS  - 3
SP  - 194
EP  - 197
PB  - Lewis
CY  - London
ER  -