A microcalorimeter is described which was developed and tested for measuring the activity of pure, β particle emitters. Two identically made calorimeter cells are used, each 46.5 mm i.d. and 54.0 mm deep and each fitted with thermomodules generating an emf of about 29 mV °C-1. The thermal energy from the cells flows into a surrounding mass of aluminium (15kg) embedded in 30 mm thick styrofoam. The entire assembly is then immersed into an open thermostated bath controlled by electric heaters an arrangement which facilitates acces for sample changing. The outputs of the modules (sensors) are connected in opposing polarities, the net output being amplified and this voltage signal is used to estimate the radioactivity in the samples. In order to demonstrate usefulness of this calorimeter, approximately 3.7 GBq (100 mCi) of tritiated water was measured. The result was compared with that of liquid scintilation counting method and found to be agreed within 5%.
A short assembly program for the PC-9801 series personal computer (NEC Corporation) has been written to receive and write the 4096 or less channel data from the S35 plus and S40 MCA (Canberra Industries Inc.) to a floppy disk. The operating system is the MS-DOS version 3.10. The data are transferred via RS-232C, and the each byte of data is received by MS-DOS BIOS call. The source list of the program is shown, and the procedures to obtain the executable code from the source list and to use the data on disks in a N88 BASIC program are explained. By using the program, it takes about 22s to transfer a whole of 4096 channel data with the transfer rate of 9600 baud.
This study was carried out to investigate effects of drugs treated in the elderly osteoporotic patients on measurements of carboxy terminal, mid-region and intact PTH, by using the various kinds of PTH kits. The drugs such as1α (OH) D3, calcitonin and so on, in the treatment of osteoporotic patients, was brought about no significant inter-relationships among carboxy terminal, mid-region and intact PTH in sera of the elderly osteoporotic patients with serum high alkaline phosphatase activity.
Asynchronous communication was made between host (FACOM M-340) and personal computer (OLIBETTIE S-2250) to get patient's information required for RIA test registration. The retrieval system consists of a keyboad input of six numeric codes, patient's ID, and a real time reply containing six parameters for the patient. Their identified parameters are patient's name, sex, date of birth (include area), department, and out- or inpatient. Linking this program to RIA registration program for individual patient, then, operator can input name of RIA test requested. Our simple retrieval program made a useful data network between different types of host and stand-alone personal computers, and enabled us accurate and labor-saving registration for RIA test.