Sentences with phrase «cis isomers»

Several cis isomers of lycopene were detected but not quantified.

«Most tomato lycopene that we eat exists as the all - trans isomer, a rigid and straight form, but in the bodies of regular tomato consumers, most lycopene exists as cis isomers, which tend to be bent and flexible.

If the vitamin A activity of cis isomers of β - carotene is estimated to be one - half that of β - carotene, the total vitamin A activity would be ≈ 426 μg RE (≈ 213 RAE) in a serving of Indian spinach and ≈ 415 μg RE (≈ 208 RAE) in a serving of sweet potatoes.

The vitamin A activity of cis isomers of β - carotene was not included in the determination of portion sizes because of uncertainty about the bioavailability of cis - β - carotene relative to all - trans - β - carotene.

Testing for anti-HIV activity showed that the cis analogue 76a (anti-HIV IC50 = 35 nM), comparable with bicyclic tetrahydroquinoline derivative 75, was the most potent among the isomers, while the activities of the cis isomer 76b and both trans diastereomers 76c and 76d were more than 10-fold lower.

Not exact matches

• A 1989 study published in the Lancet found microwaving infant formula converted trans - amino acids into cis - isomers, which are classified as neurotoxins and nephrotoxins, meaning they're toxic to your nerves and kidneys respectively.10

Resveratrol occurs in two forms, cis and trans resveratrol, the «trans» isomer is the beneficial substance that is biologically active.

Lycopene from heat - induced cis - isomer - rich tomato sauce is more bioavailable than from all - trans - rich tomato sauce in human subjects.