dose

Consequently, absorbed dose to the patient decreases when proper filtration is placed in the beam's path.

For UV exposure time 100 min, TiO2 concentration (5.93 g/L), H2O2 (4.39% v/v) pH (6.50) and shaking speed (110 rpm) > 94% degradation was achieved and > 95% degradation was achieved for 12.69 kGy absorbed dose in the presence of 4.65% H2O2.

The absorbed dose to the target organ is the sum of the cumulated activities from the source organs multiplied by their respective S values.

Effect of Absorbed Dose on the Chemical Structure of the Blend Components

Figure 1 shows surviving fraction as a function of [gamma]-ray absorbed dose. An absorbed dose of 200 Gy giving a surviving fraction of 0.20 [+ or -] 0.02 in SC7K lys2-3 strain was selected for combined treatments of [gamma]-rays either with Ip infusion or with rutin.

The plots show Eg is inversely proportional to the absorbed dose. Fig.

The gantry angle, measured absorbed dose (Gy), and % deviation for six beams with bone only homogeneous inserts with field size of 22 cm x 25 cm at 0[degrees] was 1.0293, 45[degrees] was 1.0174, 90[degrees] was 1.0234, 180[degrees] was 1.0113, 225[degrees] was 1.0127, 270[degrees] was 0.9915 Gy respectively and corresponding % deviation was 2.93, 1.74, 2.34, 1.13, 1.27, and 0.85, respectively [Table 4].{Table 4}

In this project, solid and water phantoms were used as a radiation dosimeter and compared in view of radiation absorbed dose. The current study was performed to compare the various aspects of the cobalt-60 radiation beam therapy with fixed source-surface distance (SSD) 70cm incident normally.

where [D.sub.target[left arrow]source] is the mean absorbed dose to a target organ from a source region, [N.sub.source] represents the total number of nuclear transitions that occurred in the source region, and [DF.sub.target[left arrow]source] is a dose factor that is specific for the isotope, source, and target configuration.

where DAD is dermal absorbed dose (mg/kg-day), [DA.sub.event] represents the absorbed dose per event (mg/[cm.sup.2]-event), SA is surface area available contact ([cm.sup.2]), EV is event frequency (events/day), EF is exposure frequency (days/year), and ED is the exposure duration (years).

Gel dosimetry involves the use of emerging techniques in which absorbed dose is measured by the use of radiation sensitive gels.

Most of these materials tend to exhibit a sub-or over-response compared with the absorbed dose deposited in tissue, because these materials are not tissue-equivalent (Te) (Zeff [approximately equal to] 7.4).

Other dosimetry developments include Internet-based dosimeter calibration and real-time monitoring of absorbed dose.

Finally, to express the absorbed dose from MeV/g in mGy, the multiplication for 1.6021 x [10.sup.-07] is used.

Depending on the absorbed dose, the following indicators were subjected to monitoring: functional groups involving sulphur, hydrocarbons, portions of [alpha]-helical, [beta]-sheet, and random conformations in the secondary structure, and thermal and mechanical properties.