ROM the progeny of crosses between normal canning tomatoes, LycoperF sicon esculentum Mill., and the wild species L. hirsutum Humb. and Bonpl., LINCOLN et al. (1943) and KOHLER et al. (1947) isolated a new tomato type which was distinguished from normal tomatoes by producing orange fruits in which most of the carotene produced was beta-carotene. From the study of a cross between the red canning...

background: in most cancer cases, the treatment choice for a pregnant patient is radiotherapy. in these patients, the abdomen is usually not exposed therefore fetus exposure is due to peripheral dose (pd). the purpose of this study was to estimate the fetal dose (the maximum pd in each pregnancy stage) for modalities available and to fabricate and evaluate a generally applicable fetal shield. m...

background: changes in body composition may be used for monitoring progression/ regression of a disease. prompt γ-rays in vivo neutron activation analysis (ivnaa) has been widely used for the measurement of body composition in recent years. objective: in this paper, we tried to improve the safety of ivnaa operator. methods: the most important factor for reducing the operator receiving dose is t...

The effect of shield structures for local wirings of analog integrated circuits on crosstalk is determined by electromagnetic simulation. The crosstalk of parallel wirings is reduced to -70 dB by the shield above and between the wirings. The optimal shield structure and terminal-impedance dependence are determined by numerical analysis taking terminal impedance as well as wiring length and widt...

Recent studies have suggested that betacarotene supplements can increase the risk of lung cancer among current, long-term smokers. However, these studies may have been conceived and executed on a number of faulty assumptions. There was no evidence to suggest that beta-carotene would protect specifically against lung cancer, particularly in high-risk populations. There are significant isomeric a...

Xanthophylls, primarily hydroxyland keto-derivatives of β-carotene (such as zeaxanthin, β-cryptoxanthin, canthaxanthin, echinenone and astaxanthin) have powerful antioxidant activity. Due to several positive effects on human and animal health, industrial application of xanthophylls shows an increasing tendency. In our previous study, carotenoid biosynthesis of the β-carotene producing zygomycet...

It was determined that lycopene could be cyclized directly by Rhodotorula glutinis. It was also shown the the temperature effect (i.e., increased beta-carotene synthesis in response to lower incubation temperatures) in R. glutinis was controlled by changes in enzyme concentration.

abstract         background and objective: microalgae are a group of algae that produce biochemical products consisting of a wide range of carbohydrates, lipids and proteins that are commercially valuable. interest in microalgal cultivation is currently blossoming globally. species of dunaliella are found in freshwater, euryhaline habitats of all continents, oceans including the dead sea and ev...