7-O-Methylcyanidin 3-O-β-D-Galactopyranoside, a Novel Anthocyanin from Mango (Mangifera indica L. cv. ‘Tommy Atkins’) Peels

2005 ◽  
Vol 60 (7) ◽  
pp. 801-804 ◽  
Author(s):  
Nicolai Berardini ◽  
Andreas Schieber ◽  
Iris Klaiber ◽  
Uwe Beifuss ◽  
Reinhold Carle ◽  
...  
Keyword(s):  
Chemical Transformation ◽  
Mangifera Indica ◽  
2D Nmr ◽  
Rich Source ◽  
Phenolic Composition ◽  
Tropical Fruits ◽  
Nmr Studies

Mango (Mangifera indica L.) is one of the most important tropical fruits and its pulp is known to be a rich source of carotenoids. Investigations on the phenolic composition of the peels of a red-colored cultivar (cv. ‘Tommy Atkins’) revealed the presence of a new anthocyanin, 7-O-methylcyanidin 3-O- β -D-galactopyranoside. Its structure was elucidated by extensive 1D and 2D NMR studies, MS, and chemical transformation.

2D NMR studies on muscle and cerebral metabolism in vivo

1994 ◽  
Vol 91 ◽  
pp. 697-703 ◽  
Author(s):  
B Gillet ◽  
BT Doan ◽  
C Verre-Sebrie ◽  
O Fedeli ◽  
JC Beloeil ◽  
...  
Keyword(s):  
Cerebral Metabolism ◽  
2D Nmr ◽  
Nmr Studies

scholarly journals Synthesis and Physicochemical Properties of [(1R,2S,5R)-2-isopropyl-5-methylcyclohexyloxy]-thiophen-5-yl-substituted Tetrapyrazinoporphyrazine with Magnesium(II) Ion

2021 ◽  
Vol 11 (6) ◽  
pp. 2576
Author(s):  
Sebastian Lijewski ◽  
Jiří Tydlitát ◽  
Beata Czarczynska-Goslinska ◽  
Milan Klikar ◽  
Jadwiga Mielcarek ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Singlet Oxygen ◽  
2D Nmr ◽  
Nmr Studies ◽  
Oxygen Formation ◽  
Nmr Techniques ◽  
Flash Column Chromatography ◽  
Photochemical Stability ◽  
Singlet Oxygen Formation ◽  
Very High

Tetrapyrazinoporphyrazine with peripheral menthol-thiophenyl substituents was synthesized using Linstead conditions and purified by flash column chromatography. The optimized synthetic and purification procedures allowed us to obtain a new macrocycle with 36% yield. Tetrapyrazinoporphyrazine derivative was characterized by UV–Vis and NMR spectroscopy, as well as MS spectrometry. Complex NMR studies using 1D and 2D NMR techniques allowed the analysis of the bulky menthol-thiophenyl substituted periphery of the new macrocycle. Further, photochemical stability and singlet oxygen quantum yield were determined by indirect method with diphenylisobenzofuran. The new tetrapyrazinoporphyrazine revealed low generation of singlet oxygen with a quantum yield of singlet oxygen formation at 2.3% in dimethylformamide. In turn, the macrocycle under irradiation with visible light presented very high stability with quantum yield for photostability of 9.59 × 10−6 in dimethylformamide, which figures significantly exceed the border for its classification as a stable porphyrinoid (10−4–10−5).

Two-dimensional NMR studies of acrylate copolymers

2009 ◽  
Vol 81 (3) ◽  
pp. 389-415 ◽  
Author(s):  
A. S. Brar ◽  
Ashok Kumar Goyal ◽  
Sunita Hooda
Keyword(s):  
Methyl Methacrylate ◽  
Methyl Acrylate ◽  
Quantum Coherence ◽  
Multiple Bond ◽  
Microstructural Analysis ◽  
2D Nmr ◽  
Correlation Spectroscopy ◽  
Nmr Studies ◽  
Poly Methyl Methacrylate ◽  
Nmr Study

High-resolution NMR spectroscopy is the most versatile, reliable, and generally acceptable technique for the determination of the microstructure of polymers. 2D NMR techniques, along with 1D NMR, have more potential to study absolute configurational assignments and sequence distribution of copolymers. Physical and chemical properties of polymers are influenced fundamentally by their microstructure. We discuss the detailed microstructure analysis of a large number of homopolymers, copolymers, and terpolymers. 2D NMR study of poly(methyl methacrylate) (PMMA), poly(methyl acrylate) (PMA), and poly(methacrylonitrile) (PMAN) is discussed in this article. In addition to homopolymers, 2D heteronuclear single-quantum coherence (HSQC), total correlation spectroscopy (TOCSY), and heteronuclear multiple-bond correlation (HMBC) study of different copolymers such as poly(methyl methacrylate-co-methyl acrylate), poly(styrene-co-methyl methacrylate), and poly(methyl methacrylate-co-methacrylonitrile) have also been reported here. This in turn helps in microstructural analysis of terpolymers such as poly(methacrylonitrile-co-styrene-co-methyl methacrylate), poly(acrylonitrile-co-methyl methacrylate-co-methyl acrylate), and poly(ethylene-co-vinyl acetate-co-carbon monoxide).

The6Li,6Li-INADEQUATE Experiment: A New Tool for 1D- and 2D-NMR Studies of Organolithium Compounds

1992 ◽  
Vol 75 (3) ◽  
pp. 883-891 ◽  
Author(s):  
Oswald Eppers ◽  
Thomas Fox ◽  
Harald Günther
Keyword(s):  
2D Nmr ◽  
Nmr Studies ◽  
Organolithium Compounds

INVESTIGATIONS ON FORAGE YIELD OF OAT GENOTYTPES UNDER IRRIGATED CONDITIONS OF KONYA

2021 ◽  
Vol 9 (2) ◽  
pp. 85-88
Author(s):  
Muhammad Ahsan Qureshi ◽  
Waqar Shafqat
Keyword(s):  
Mangifera Indica ◽  
Forage Yield ◽  
Root Induction ◽  
Shoot Induction ◽  
Tropical Fruits ◽  
Asexual Propagation ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
High Concentrations ◽  
Direct Shooting

Shoot tips of newly emerging mango shoots were used as an explant and cultured on MS media for direct shooting. Different plant growth regulators i.e. BAP, NAA and IAA in varying concentrations were added to basal MS media. Experiment was laid out according to Completely Randomized Design (CRD) with four treatments and each treatment was replicated thrice. Maximum shoot induction (55.56%) was observed with 1 mg/L of BAP. Maximum mortality (83.30%) was observed when maximum concentration of BAP (3 mg/L) was used. Minimum days (12.633) to induce shoots were observed on MS media supplemented with 1 mg/L of BAP. Maximum number of shoots (2.50) were recorded in MS media supplemented with 1 mg/L of BAP. Low concentration of NAA initiated roots earlier in regenerated shoots as compare to high concentrations of NAA and IAA. MS media supplemented with NAA (1 mg/L) took less days (21 days) to induce roots. The combination of auxins (MS+ NAA 3 mg /L + IAA 1 mg /L) proved the best for root induction (38.87%). Keywords: Mangifera indica, tropical fruits, asexual propagation, plant tissue culture, micropropagation, phenolic exudation, acclimatization.

scholarly journals Phenolic composition and inhibitory activity of Mangifera indica and Mucuna urens seeds extracts against key enzymes linked to the pathology and complications of type 2 diabetes

2014 ◽  
Vol 4 (11) ◽  
pp. 903-910 ◽  
Author(s):  
Emmanuel Anyachukwu Irondi ◽  
Ganiyu Oboh ◽  
Afolabi Akintunde Akindahunsi ◽  
Aline Augusti Boligon ◽  
Margareth Linde Athayde
Keyword(s):  
Type 2 Diabetes ◽  
Inhibitory Activity ◽  
Mangifera Indica ◽  
Phenolic Composition ◽  
Key Enzymes

scholarly journals Salaramides A and B; Two α-Oxoamides Isolated from the Marine Sponge Hippospongia sp. (Porifera, Dictyoceratida)

2010 ◽  
Vol 5 (2) ◽  
pp. 1934578X1000500
Author(s):  
Julia Bensemhoun ◽  
Amira Rudi ◽  
Yoel Kashman ◽  
Emile M. Gaydou ◽  
Jean Vacelet ◽  
...  
Keyword(s):  
Chemical Transformation ◽  
Marine Sponge ◽  
Mass Spectra ◽  
Nmr Spectra ◽  
2D Nmr ◽  
2D Nmr Spectra

Two novel α-oxoamides, salaramide A (1) and its homologue salaramide B (2), were isolated from the Madagascar marine sponge, Hippospongia sp., collected in Salary Bay, north of Tulear. The structures of 1 and 2 were elucidated by interpretation of mass spectra, 1D and 2D NMR spectra, and confirmed by chemical transformation.

scholarly journals Two Ring-A-Aromatized Bile Acids from the Marine Sponge Sollasella Moretonensis

2010 ◽  
Vol 5 (10) ◽  
pp. 1934578X1000501 ◽  
Author(s):  
Zhenyu Lu ◽  
Ryan M. Van Wagoner ◽  
Mary Kay Harper ◽  
John N. A. Hooper ◽  
Chris M. Ireland
Keyword(s):  
Bile Acids ◽  
Marine Sponge ◽  
2D Nmr ◽  
Natural Source ◽  
Nmr Studies

Two ring-A-aromatized bile acids, 1 and 2, were isolated from the sponge Sollasella moretonensis, collected from the seabed of northern Queensland. Structures were assigned on the basis of extensive 1D and 2D NMR studies, as well as analysis by HRESIMS. Compound 2 has previously been produced synthetically, though this marks its first isolation from a natural source.

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