Effect of a 1000 R dose of hard X-rays, with two different dose-rates viz. 300 and 1000 R/min on somatic crossing over in the X chromosome of Drosophila melanogaster was studied in two different genotypes. Irradiation was given during the first-instar larval stage of the development. In the control crosses the flies carried wild-type autosomes, but in the experimental crosses the 3 chromosomes ...

Low doses (2.5-15 cGy) of X-irradiation two months prior to a second exposure to a sublethal dose enhanced the survival rate in mice. Optimal and significant increase was observed with 5-10 cGy. Endogenous spleen colony counts (endo-CFUs) after 7 Gy increased by a factor of about 1.7 in mice pre-irradiated with 5-10 cGy, while the number of blood forming stem cells (CFUs) in the pre-irradiated ...

The influence of in utero low-dose ionizing radiation exposure on murine hemopoietic embryogenesis was investigated. In vitro assays such as micro plasma-clot cultures and doublelayer soft agar cultures served as sensitive biodosimeters to determine erythropoietic and granulopoietic injuries. Day-10-5, HA/ICR, pregnant mice were irradiated with 0, 50, 100, 150,200, or 300 rads, and day-14-5 fet...

Total-body irradiation (TBI) with 0.02-0.25 Gy has been reported to have antitumor effects. In mice, low-dose TBI induces tumor growth delay, antimetastatic effects, suppressive effects on the incidence of spontaneous thymiclymphoma, sensitization of tumor to ionizing radiation, and decrease in TD50 value. In artificial metastasis, 0.20 Gy TBI suppressed lung metastasis when it was conducted be...

MOUSSA, H. R., 2011. Low dose of gamma irradiation enhanced drought tolerance in soybean. Bulg. J. Agric. Sci., 17: 63-72 Drought stress is the main limiting factor of soybean production. However, no work has been done on how application of low-dose of gamma rays could help to overcome water deficits during critical stages of soybean development. Gamma rays at doses 0.0 and 20 Gray (Gy), from a...

Soft tissue allografts for ligament and tendon reconstruction have been used successfully for many years, and their usage has increased dramatically in the past decade. The rate of soft tissue allograft usage in primary anterior cruciate ligament (ACL) reconstruction vs. autograft usage went up from 17% of all surgeries in 2002 to 46% of all surgeries in 20081. Allografts are either processed a...

To investigate the influence of low-dose-rate irradiation on the growth of silkworms, Bombyx mori, eggs of silkworms were randomly divided into 2 groups and were grown on either low-dose-radiation-emitting sheets or control sheets. On the radiation-emitting sheets, the dose rate was measured as 66.0 (4.3) μSv/h (mean [standard deviation]) by a Geiger-Müller counter for α, β, and γ rays and 3.8 ...

INTRODUCTION Modulation of gene expression in response to ionizing radiation is of prime interest in the field of radiation biology. In most articles concerning biological responses to ionizing radiation, the findings of radiation-induced gene expression after irradiation at a lethal dose range (2-50 Gy) has been reported. Recently, the biological effect of low dose radiation on cellular respon...

The aim of this study is to evaluate the incidence of interstitial pneumonitis following fractionated total body irradiation conditioning for bone marrow transplantation with varying lung doses due to shielding technique and different dose-rates. Between 1987 and 2001, a total number of 105 patients have received total body irradiation conditioning for bone marrow transplantation for hematologi...