4101 Can a Pictrography image be used for submission to journals? Generally, it can be accepted. This depends on the policies of each science journal and some journals do not clearly state so. The following are the old and recent journals that accepted and carried the Pictrography images. Yaeta Tndo, Anton Gluck, Ira. G. Wool: J. Mol. Biol. (1991) 221, 193-207 Takayuki Nakano, Toshiyuki Satoh, Keiji Mori, and Osamu Inoue: Neuroscience Letters (1998) 250, 161-164 Yasuo Suda, Keiji Mori, Karyn Bird, Dalila Marques, Julie Ormsby, Satoshi Tanaka, Shuhei koshida, Megumi Nakamura, Shoichi Kusumoto, Michael Sobel: J. Biochem. (1999) 125, 1011-1015 4201 What does PSL stand for? 4201 It is an acronym for photo-stimulated luminescence that is generated when IP is scanned with laser light in BAS. 4202 How PSL can be defined quantitatively? The image data obtained from a standard IP exposed to the X-ray of 3.87x10-8C/kg(0.15mR) with accelerated voltage of 80kV as tungusten target is defined as 100PSL/mm2. The value of PSL/mm2 becomes smaller even when exposed to the same radiation and its amount, as more exposure time passes, the temperature of IP increases, or the time between exposure and scanning expands. Also, its value is affected by the radiation, radiation quality, IP type or reading condition. Therefore, the above quantitative definition is significant in terms of system designing and adjustment but is less significant in actual usage of IP. 4203 What actual meaning does PSL value carry? For those who use IP for quantitative autoradiography, PSL and PSL/mm2 values have the following meanings. - PSL/mm2 is a radiation amount unit unique to BAS system. - PSL/mm2 approximately is in proportion with the Bq/mm2 of the exposed sample multiplied by the exposure time. This proportional factor varies depending on the thickness of the nuclide and sample. - PSL is the value reached by multiplication of PSL/mm2 and the determination area (mm2). PSL is approximately in proportion with (Bq x (exposure time) ) of the sample. - For a relative comparison within one image, comparing PSL/mm2 or PSL gives fairly accurate result. - The longer the exposure time or the time between the completion of exposure and the reading out is, or the higher the temperature is the smaller the PSL/mm2 value is. - There is no equation to convert PSL/mm2 or PSL values into absolute values such as Bq. 4204 How is PSL value to be expressed in publication paper? Basically it depends on the structure of the paper but when comparing the amounts or on the y-axis of a coordinate, it can be expressed as dose (PSL/mm2) or IP response. When discussing data within an image, it can be expressed as relative activity (PSL). To IMAGING PLATE