Abstract
The leaf extract of Tabernaemontana heyneana Wall. from different solvents was investigated for in vitro antioxidant activities. The antioxidant stability of the extracts under preserved condition (one month stored at 4oC) was also analyzed. The fresh extracts were found to contain appreciable total polyphenolic content (11.4 ± 0.17 mg/g tissue), total flavonoids (4.3 ± 0.17 mg rutin equivalents/g tissue) and ascorbic acid (5.0 ± 0.01 mg/ g tissue). The methanolic leaf extract of T. heyneana Wall. (METH-L) possesses remarkable reducing power [ferrous, cupric and cerium (IV) ions]. The metal ions were chelated at IC50 = 549 μg/ml and hydroxyl, ABTS and DPPH radicals were inhibited at IC50= 577 μg/ml, 537 μg/ml and 507 μg/ml, respectively. A noteworthy superoxide (69.07% ± 11.88) and nitric oxide (74.73 % ± 10.12) radical scavenging activities were observed in METH-L. Similarly, the preserved leaf extracts have proved to possess a stable antioxidant activity compared to fresh extracts (FRAP=1.25% decrease, CUPRAC = 3.88% decrease, metal chelation =3.36% decrease and DPPH = 2.05% decrease). The overall scientific documentation indicated that the METH-L possess significant antioxidant activity than the other solvent extracts.
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Claims 15
Claim · model-written summary
Fresh T. heyneana leaf extracts contained total polyphenolic content of 11.4 ± 0.17 mg/g tissue.
- Taxon
- Tabernaemontana heyneana
Tabernaemontana alternifoliat0 - Outcome
- total polyphenolic contente0
- Value
- 11.4 ± 0.17 mg/g tissuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“total polyphenolic content (11.4 ± 0.17 mg/g tissue)”
Claim · model-written summary
Fresh extracts contained total flavonoids of 4.3 ± 0.17 mg rutin equivalents/g tissue.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Outcome
- total flavonoidse0
- Value
- 4.3 ± 0.17 mg rutin equivalents/g tissuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“total flavonoids (4.3 ± 0.17 mg rutin equivalents/g tissue)”
Claim · model-written summary
Fresh extracts contained ascorbic acid at 5.0 ± 0.01 mg/g tissue.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Outcome
- ascorbic acide0
- Value
- 5.0 ± 0.01 mg/ g tissuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“ascorbic acid (5.0 ± 0.01 mg/ g tissue)”
Claim · model-written summary
The methanolic leaf extract (METH-L) possesses remarkable reducing power for ferrous, cupric and cerium (IV) ions.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Outcome
- reducing powere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“The methanolic leaf extract of T. heyneana Wall. (METH-L) possesses remarkable reducing power [ferrous, cupric and cerium (IV) ions]”
Claim · model-written summary
METH-L chelated metal ions at IC50 = 549 μg/ml.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Outcome
- The metal ions were chelatede0
- Value
- IC50 = 549 μg/mle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“The metal ions were chelated at IC50 = 549 μg/ml”
Claim · model-written summary
METH-L inhibited hydroxyl radicals at IC50 = 577 μg/ml.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Outcome
- hydroxyle0
- Value
- 577 μg/mle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“hydroxyl, ABTS and DPPH radicals were inhibited at IC50= 577 μg/ml, 537 μg/ml and 507 μg/ml, respectively”
Claim · model-written summary
METH-L inhibited ABTS radicals at IC50 = 537 μg/ml.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Outcome
- ABTSe0
- Value
- 537 μg/mle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“hydroxyl, ABTS and DPPH radicals were inhibited at IC50= 577 μg/ml, 537 μg/ml and 507 μg/ml, respectively”
Claim · model-written summary
METH-L inhibited DPPH radicals at IC50 = 507 μg/ml.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Outcome
- DPPHe0
- Value
- 507 μg/mle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“hydroxyl, ABTS and DPPH radicals were inhibited at IC50= 577 μg/ml, 537 μg/ml and 507 μg/ml, respectively”
Claim · model-written summary
METH-L showed superoxide radical scavenging activity of 69.07% ± 11.88.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Outcome
- superoxidee0
- Value
- 69.07% ± 11.88e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“A noteworthy superoxide (69.07% ± 11.88) and nitric oxide (74.73 % ± 10.12) radical scavenging activities were observed in METH-L”
Claim · model-written summary
METH-L showed nitric oxide radical scavenging activity of 74.73% ± 10.12.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Outcome
- nitric oxidee0
- Value
- 74.73 % ± 10.12e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“A noteworthy superoxide (69.07% ± 11.88) and nitric oxide (74.73 % ± 10.12) radical scavenging activities were observed in METH-L”
Claim · model-written summary
Extracts preserved one month at 4 °C showed a 1.25% decrease in FRAP relative to fresh extracts, indicating stable activity.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Treatment
- preserved leaf extractse0
- Outcome
- FRAPe0
- Direction
- decreasee0
- Value
- 1.25%e0
- Comparator
- fresh extractse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“the preserved leaf extracts have proved to possess a stable antioxidant activity compared to fresh extracts (FRAP=1.25% decrease, CUPRAC = 3.88% decrease, metal chelation =3.36% decrease and DPPH = 2.05% decrease)”
Claim · model-written summary
Preserved extracts showed a 3.88% decrease in CUPRAC relative to fresh extracts.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Treatment
- preserved leaf extractse0
- Outcome
- CUPRACe0
- Direction
- decreasee0
- Value
- 3.88%e0
- Comparator
- fresh extractse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“the preserved leaf extracts have proved to possess a stable antioxidant activity compared to fresh extracts (FRAP=1.25% decrease, CUPRAC = 3.88% decrease, metal chelation =3.36% decrease and DPPH = 2.05% decrease)”
Claim · model-written summary
Preserved extracts showed a 3.36% decrease in metal chelation relative to fresh extracts.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Treatment
- preserved leaf extractse0
- Outcome
- metal chelatione0
- Direction
- decreasee0
- Value
- 3.36%e0
- Comparator
- fresh extractse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“the preserved leaf extracts have proved to possess a stable antioxidant activity compared to fresh extracts (FRAP=1.25% decrease, CUPRAC = 3.88% decrease, metal chelation =3.36% decrease and DPPH = 2.05% decrease)”
Claim · model-written summary
Preserved extracts showed a 2.05% decrease in DPPH activity relative to fresh extracts.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Treatment
- preserved leaf extractse0
- Outcome
- DPPHe0
- Direction
- decreasee0
- Value
- 2.05%e0
- Comparator
- fresh extractse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“the preserved leaf extracts have proved to possess a stable antioxidant activity compared to fresh extracts (FRAP=1.25% decrease, CUPRAC = 3.88% decrease, metal chelation =3.36% decrease and DPPH = 2.05% decrease)”
Claim · model-written summary
METH-L possesses significant antioxidant activity relative to the other solvent extracts.
- Taxon
- Tabernaemontana heyneanaTabernaemontana alternifoliat0
- Outcome
- antioxidant activitye0
- Direction
- higherinferrede0
- Comparator
- other solvent extractse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tabernaemontana heyneana”
e0“the METH-L possess significant antioxidant activity than the other solvent extracts”