Stereoisomeric composition of two bioflavonoids from Larix sibirica

Kolesnik, Yu. A.; Titova, E. V.; Чертков, В. А.; Tashlitsky, Vadim N.; Tikhonov, V. V.; Shmatkov, Daniil

doi:10.1055/s-0031-1282213

Cited by 9 publications

(6 citation statements)

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“…At the same time, the peaks of C5-C10 in ring A of LC-oligoDHQ (Fig. 6b) Thus, the results of the comparative analysis of 1 Н and 13 C NMR spectra of DHQ monomer and LC-oligoDHQ, as well as some literature data on related compounds [22,[29][30][31] allow us to assume that LC-catalyzed oxidation of DHQ starts with the removal of hydrogen from the hydroxyl group at C3 to produce an active radical, which can be predominantly attached to C2 , C5 or C6 carbons of another molecule of monomer.…”

Section: Resultssupporting

confidence: 64%

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Laccase-mediated biotransformation of dihydroquercetin (taxifolin)

Khlupova

Васильева

Shumakovich

et al. 2016

Journal of Molecular Catalysis B: Enzymatic

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Section: Resultssupporting

confidence: 64%

“…It is a group of peaks assigned to quaternary carbons at 191-193 ppm. Analysis of literature data enables us to assume that these peaks ought to be assigned to C4 carbonyl group, and the high field shift may be attributed to the gammaeffect caused by the replacement of the hydroxyl in position 3 with an alkoxy group [22,[29][30][31].…”

Section: Resultsmentioning

confidence: 99%

Laccase-mediated biotransformation of dihydroquercetin (taxifolin)

Khlupova

Васильева

Shumakovich

et al. 2016

Journal of Molecular Catalysis B: Enzymatic

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“…Fomichev et al (2016) first drew attention to the potential of bioflavonoids obtained from bark of Siberian larch (Larix sibirica). Analysis of stereoisomeric composition demonstrated two bioflavonoids derived from Siberian larch (Larix sibirica) (Kolesnik et al 2011). As a result of its healthy effects Fomichev et al (2016) supposed that 1-5 g Larix sibirica dihydroquercetin powder (DHQ-1)/kg supplementation can be used for the realisation of a productive potential of lambs under an impact of stress-factors.…”

Section: Introductionmentioning

confidence: 99%

Impact of Siberian larch dihydroquercetin or dry distilled rose petals as feed supplements on lamb's growth performance, carcass characteristics and blood count parameters.

Stancheva¹,

Nakev²,

Vlahova-Vangelova³

et al. 2020

agriRxiv

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The objective of this study was to determine the impact of dihydroquercetin from Siberian larch and dry distilled rose petals (DDRP) on growth performance, carcasses quality and blood characteristics of lambs from the Bulgarian Dairy Synthetic population sheep. For the purpose of the study there were used 30 clinically healthy male lambs aged 65 days, levelled by live weight. They were housed in a totally indoor barn and were divided into one control and two experimental groups, each consisting of 10 animals that were fed for 50 days. The control group (C) was fed ground alfalfa + granulated compound feed. The experimental groups (D) and (R) were fed on the same diet supplemented either with 7.5 mg dihydroquercetin/kg/day or with 545 mg dry distilled rose petals (DDRP)/kg/day respectively. The experimental group D had 5.45% and 8.78% higher slaughter weight comparing to the control group C and experimental group R, respectively. The carcass yield of lambs supplemented with dihydroquercetin was 1.28% and 2.19% higher compared to control group C or the lambs that had consumed DDRP. The carcass yield of lambs having consumed dihydroquercetin is higher by 1.28% and 2.19% respectively compared to lambs from control group C or those having consumed DDRP. The carcass conformation of C or R groups lambs do not differ (70% - class P, 30% - class O). The 90% of lamb's carcasses from the experimental group D were classified in class P. No significant differences were found in the fatness degree. The dihydroquercetin feeding increases the relative fat content (P ≤ 0.01) of lamb carcasses but adversely affects their conformation. No significant differences (p > 0.05) were found between 1st h and 24th h post-mortem pH of control group C and experimental group D. Compared to them the pH values of the experimental group R were by 0.14 - 0.15 pH units lower (p ≤ 0.05). No significant differences (p > 0.05) were found in the blood count of the three studied groups of lambs. Exceptions were made for erythrocytes (RBC) and haemoglobin (HGL) in the experimental group D which were higher (p ≤ 0.05) than these in control group C and experimental group R. The conclusion made was that the use of the dihydroquercetin had a positive effect on the lamb's fattening, slaughter weight and carcass yield. Such an effect was not detected when DDRP was used.

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“…Fomichev et al (2016) first drew attention to the potential of bioflavonoids obtained from bark of Larix spp. Analysis of stereoisomeric composition demonstrated two bioflavonoids derived from Siberian larch (Larix sibirica) (Kolesnik et al, 2011). As a result of its healthy effects Fomichev et al (2016) supposed that 1-5 g Larix dahurica Turcz dihydroquercetin preparation DHQ1/kg supplementation can be used for the realisation of a productive potential of lambs under an impact of stress-factors.…”

Section: Introductionmentioning

confidence: 99%

Impact of Siberian larch dihydroquercetin or dry distilled rose petals as feed supplements on 8 lamb's growth performance, carcass characteristics and blood count parameters.

et al. 2020

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Abstract

The objective of this study was to determine the impact of dihydroquercetin from Siberian larch and dry distilled rose petals (DDRP) on growth performance, carcasses characteristics and blood parameters of lambs from the Bulgarian Dairy Synthetic population sheep. For the purpose of the study there were used 30 clinically healthy male lambs aged 65 days, levelled by live weight. They were housed in a totally indoor barn and were divided into one control and two experimental groups, each consisting of 10 animals that were fed for 50 days. The control group (C) was fed ground alfalfa + granulated compound feed. The experimental groups (D) and (R) were fed on the same diet supplemented either with 7.5 mg dihydroquercetin/kg/day or with 545 mg DDRP/kg/day respectively. The carcass yield of lambs having consumed dihydroquercetin or DDRP compared to lambs from control group C do not have significant differences (p > 0.05). The carcass conformation of C or R groups lambs do not differ (70% - class P, 30% - class O). The 90% of lamb's carcasses from the experimental group D were classified in class P. The dihydroquercetin feeding increases the relative fat content (p ≤ 0.01) of lamb carcasses but adversely affects their conformation. No significant differences (p > 0.05) were found between 1st h and 24th h post-mortem pH of control group C and experimental group D. Compared to them the pH values of the experimental group R were by 0.14-0.15 pH units lower (p ≤ 0.05). No significant differences (p > 0.05) were found in the blood count of the three studied groups of lambs. Exceptions were made for haemoglobin (HGL) in the experimental group D which were with 6-7 g/l higher (p ≤ 0.05) than these in control group C and experimental group R and the blood glucose (GLU) in the experimental group R which is with 0.25-0.28 mmol/l lower than determined in control group C and experimental group D.

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Stereoisomeric composition of two bioflavonoids from Larix sibirica

Cited by 9 publications

References 0 publications

Laccase-mediated biotransformation of dihydroquercetin (taxifolin)

Laccase-mediated biotransformation of dihydroquercetin (taxifolin)

Impact of Siberian larch dihydroquercetin or dry distilled rose petals as feed supplements on lamb's growth performance, carcass characteristics and blood count parameters.

Impact of Siberian larch dihydroquercetin or dry distilled rose petals as feed supplements on 8 lamb's growth performance, carcass characteristics and blood count parameters.

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