A case-control study investigated the association between dietary fat and breast cancer in Saudi Arabian women attending a specialist hospital in Riyadh. Women with breast carcinoma [n= 499] newly diagnosed between 1996-2002, and control women [n = 498] randomly selected from patients’ attendants and relatives, completed a food frequency questionnaire. Serum levels of triglycerides and total cholesterol were measured. A significant positive association was found between risk of breast cancer and intake of fats, protein and calories. Adjusted odds ratios for the highest quartile of intake versus the lowest were 2.43 for saturated fat, 2.25 for animal protein, 2.12 for polyunsaturated fat, 1.88 for cholesterol and 2.69 for total energy from dietary intake. For serum triglycerides the adjusted odds ratio was 2.16 for the highest quartile

http://eajbsf.journals.ekb.eg/ Toxicity of Nanosilica Particles on Eobania vermiculata and Their Effects on Biochemical Changes in Rats.

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This work was conducted to study the effect of different temperatures (20, 25 and 30°C) on biological aspects of predatory mite, Phytoseiulus persimilis Athias -Henriot, 1957[1] (Acari: Phytoseiidae). The developmental periods of P. persimilis was shortened with increasing temperature. Incubation period of P. persimilis, was 2.45 days at 30°C followed by 2.84 at 25°C and 5.04 days at 20 °C, respectively. The life cycle of P. persimilis female differed according to temperature degree, its shortest period was 6.45 days at 30°C, while its longest period 12.03 days at 20 °C. Total immatures of P. persimilis consumed more preys at high temperature compared with low temperature; it was 21.32, 14.81 and 11.37 preys for females at 30, 25 and 20 °C respectively. Also females consumed higher numbers of preys at the ovipostion period reached to 127.94, with maximum average fecundity (43.17 eggs) was deposited by female at 30 °C followed by 25°C (37.00 eggs) ,whereas the longest period was recorded at 20°C with an average of 29.75 eggs/female. P. persimilis proved to be a good bio-control against Tetranychus urticae infesting strawberry plants under field conditions at release ratios 1:5, 1:10 and 1:15 predator / prey. Reduction percent appeared one week after release, generally it revealed 71.38, 62.89 and 22.16 % mean reduction for each release ratios after 8 weeks, respectively. The releasing of P. persimilis at level 1:5 gave the best results of bio-control of T. urticae.