scholarly journals XANTHONES AND OTHER COMPOUNDS FROM THE LATEX OF GARCINIA COWA

2021 ◽  
Vol 58 (6A) ◽  
pp. 218
Author(s):  
An Kim Nguyen Thi ◽  
Ngo Dai Quang ◽  
Pham Quoc Long ◽  
Tran Thi Thu Thuy
Keyword(s):  
Spectroscopic Analysis ◽  
Ongoing Study ◽  
Physico Chemical ◽  
Garcinia Cowa ◽  
Reported Data

From our ongoing study on the latex of Garcinia cowa Roxb. ex Choisy collected in Quy Chau, Nghe An province, seven compounds were isolated including four prenylated xanthones: norcowanin (1), kaennacowanol A (2), garcinone D (3), fuscaxanthone I (4); one tocotrienol: parvifoliol F (5) and two triterpenes: stigmasterol (6), lupeol (7). The structures of the isolated compounds were elucidated by physico-chemical spectroscopic analysis and by comparison with reported data. To the best of our knowledge, garcinone D (3), fuscaxanthone I (4) and parvifoliol F (5) were first reported as components of Garcinia cowa. 

scholarly journals Evaluation of the performance of encapsulated lifting system composting technology with a GORE(R) cover membrane: Physico-chemical properties and spectroscopic analysis

2019 ◽  
Vol 25 (3) ◽  
pp. 299-308
Author(s):  
Mutaz Al-Alawi ◽  
Loubna El Fels ◽  
Ramadan Benjreid ◽  
Tamas Szegi ◽  
Mohamed Hafidi ◽  
...  
Keyword(s):  
Spectroscopic Analysis ◽  
Chemical Properties ◽  
Physico Chemical ◽  
Lifting System

Seasonal variations in the water quality, diversity and population ecology of intertidal macrofauna at an industrially influenced coast

2010 ◽  
Vol 61 (6) ◽  
pp. 1505-1514 ◽  
Author(s):  
A. Vaghela ◽  
P. Bhadja ◽  
J. Ramoliya ◽  
N. Patel ◽  
R. Kundu
Keyword(s):  
Water Quality ◽  
Seasonal Variations ◽  
Anthropogenic Activities ◽  
Habitat Destruction ◽  
Anthropogenic Pressure ◽  
The North ◽  
Physico Chemical ◽  
Littoral Zones ◽  
Reported Data ◽  
Physical And Chemical

Present communication reports the physico-chemical and biological quality of seawater and status of benthos of a highly industrialized shore of the north-western coastline of India. The coastal area considered for the present study, encircled by a variety of industries, was divided into two sampling sites and monitored for two consecutive years. Results of the water quality suggest that the obtained values of the physical and chemical parameters of seawater were comparable with data reported earlier. However, data obtained in the biological parameters of the seawater showed a declining trend. Results of the intertidal macrofaunal diversity studies revealed that the muddy upper littoral zones were represented by few species of coelenterata, porifera, arthropoda and mollusca. In the rocky—muddy middle littoral zones, gastropods, stars fishes, corallites, crabs, polychetes and tubeworms were present, whereas, predominantly rocky lower littoral zones were comparatively rich in macrofaunal diversity with small patches of coral colonies. However, when the results obtained in the present study was compared with that of earlier reported data, it was clear that the macrofaunal diversity indeed declined considerably over the years. This may be due to habitat destruction and habitat alteration in the coastline caused by increased anthropogenic activities in the area. Seasonal variations in the population density and abundance were observed in most of the faunal groups except in sessile corals and sponges. This may be due to local migration of the faunal groups towards deeper regions of the Gulf, as supported by the analysis of similarity, to avoid influx of freshwater during monsoon, and high temperature during summer and post monsoon seasons. The overall assessment of different parameters of this study revealed that though the physico- chemical characteristics of the seawater did not varied much from the earlier reported status, the biological characteristics of the seawater and intertidal zone was affected possibly by a high degree of anthropogenic pressure.

scholarly journals Structures of New Phenolic Glycosides from the Seeds of Cucurbita Moschata

2009 ◽  
Vol 4 (4) ◽  
pp. 1934578X0900400
Author(s):  
Li Fa-Sheng ◽  
Xu Jing ◽  
Dou De-Qiang ◽  
Chi Xiao-Feng ◽  
Kang Ting-Guo ◽  
...  
Keyword(s):  
Spectral Data ◽  
Spectroscopic Analysis ◽  
Phenolic Glycosides ◽  
Phenolic Glycoside ◽  
Cucurbita Moschata ◽  
Reported Data ◽  
First Time ◽  
Chemical Evidence

A new phenolic glycoside and three known compounds were isolated from the seeds of Cucurbita moschata. The structures of the new compound was elucidated as phenylcarbinyl 5-O-(4-hydroxy)benzoyl-β-D-apiofuranosyl (1→2)-β-D-glucopyranoside on the basis of spectroscopic analysis and chemical evidence. Three known compounds were identified as 1-O-benzyl[5-O-benzoyl-β-D-apiofuranosyl(1→2)]-β-D-glucopyranoside 2, cucurbitosides C 3 and A 4, by comparison of the spectral data with reported data. Compound 2 was isolated from this plant for the first time.

scholarly journals Ring B Aromatic Steroids from an Endophytic Fungus, Colletotrichum sp.

2009 ◽  
Vol 4 (11) ◽  
pp. 1934578X0900401 ◽  
Author(s):  
Wen Zhang ◽  
Siegfried Draeger ◽  
Barbara Schulz ◽  
Karsten Krohn
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Activity ◽  
Bacillus Megaterium ◽  
Endophytic Fungus ◽  
Spectroscopic Analysis ◽  
Chemical Diversity ◽  
Chlorella Fusca ◽  
Microbotryum Violaceum ◽  
Reported Data ◽  
Insight Into

The new (22E,24R)-3-acetoxy-19(10→6)-abeo-ergosta-5,7,9,22-tetraen-3β-ol (1) and the known (22E,24R)-19(10→6)-abeo-ergosta-5,7,9,22-tetraen-3β-ol (2), two interesting ergosteroids with rare aromatized ring B, together with seven known derivatives, namely (22E,24R)-ergosta-5,7,22-trien-3β-ol (3), (22E,24R)-ergosta-4,7,22-trien-3-one (4), (22E,24R)-ergosta-4,6,8(14),22-tetraen-3-one (5), (22E,24R)-5α,8α-epidioxyergosta-6,22-dien-3β-ol (6), (22E,24R)-ergosta-7,22-dien-3β,5α,6β-triol (7), (22E,24R)-6-acetoxy-ergosta-7,22-dien-3β,5α,6β-triol (8), and (22E,24R)-3,6-diacetoxy-ergosta-7,22-dien-3β,5α,6β-triol (9), were isolated from Colletotrichum sp., an endophytic fungus isolated from Ilex canariensis from Gomera. The structures of these compounds were elucidated by detailed spectroscopic analysis, comparison with reported data, and chemical interconversion. The isolation of these metabolites not only displays a beautiful array of chemical diversity, but also gives insight into the biosynthetic interconnections. Preliminary studies showed antimicrobial activity of these compounds against the fungus Microbotryum violaceum, the alga Chlorella fusca, and the bacteria Escherichia coli and Bacillus megaterium.

Preparation, Vulcanization, and Characterization of Syndiotactic Trans-1,2-Polypentadiene

1970 ◽  
Vol 43 (4) ◽  
pp. 771-777
Author(s):  
G. S. Fielding-Russell ◽  
G. H. Smith
Keyword(s):  
Physical Properties ◽  
Spectroscopic Analysis ◽  
Crosslinking Agent ◽  
Catalyst System ◽  
Published Data ◽  
Monomer Mixture ◽  
Physical Measurements ◽  
Structural Differences ◽  
Reported Data

Abstract The polymerization, vulcanization, and some physical properties of two syndiotactic trans-1,2 polypentadienes (polypiperylenes) are described. Spectroscopic analysis indicated a significant (≈22%) cis-1,4 structure in the polymer prepared with the Et2AlCl/Co (AcAc)3 catalyst system which, although not in agreement with previously published data, is complementary to recently reported data. It is thought that the presence of water in the catalyst solvent or monomer mixture is responsible for the cis-1,4 content. Water appeared not to influence the Et2AlCl/Co(Octoate)2 polymerization in the same way: a greater than 95% trans-1,2 structure was obtained. Physical measurements on the vulcanizates reflected the structural differences. The copolymer vulcanizate, ≈22% cis-1,4 and ≈78% trans-1,2 structure, was more highly crosslinked than the polymer vulcanizate containing no detectable 1,4 structure. The relative levels and temperature location of the rubbery modulus and the Tg's and loss processes, respectively, are related to the 1,4 content: the vulcanizate containing 1,4 structure shows a higher Tg and rubbery modulus than the vulcanizate containing no detectable 1,4 structure. The inference is that the open copolymer presents a less sterically hindered path to the unsaturation for the bulky crosslinking agent and is therefore more susceptible to vulcanization, giving a tougher rubber that may also be reinforced by crystallization of the cis-1,4 units.

Antimicrobial Materials Derived from the Endophytic Fungus Fusarium sp. of Eucommia ulmoides

2012 ◽  
Vol 531 ◽  
pp. 346-349 ◽  
Author(s):  
Hong Chi Zhang ◽  
Yang Min Ma ◽  
Rui Liu
Keyword(s):  
Endophytic Fungus ◽  
Spectroscopic Analysis ◽  
Screening Program ◽  
Eucommia Ulmoides ◽  
Antibacterial And Antifungal Activities ◽  
Antimicrobial Materials ◽  
Fusarium Sp ◽  
Reported Data ◽  
Antibacterial And Antifungal ◽  
First Time

Within our screening program for antimicrobial materials, eight compounds (1-8) were isolated from an endophytic fungus Fusarium sp. of Eucommia ulmoides. Compound 1, 2, 5-8 were isolated for the first time from endophytic fungi. Their structures were elucidated on the basis of NMR spectroscopic analysis with the reported data in the literature. All compounds showed potent antibacterial and antifungal activities and can be use as new antimicrobial materials.

scholarly journals TETRAOXYGENATED XANTHONES FROM THE LATEX OF GARCINIA COWA

2018 ◽  
Vol 56 (5) ◽  
Author(s):  
An Kim Nguyen ◽  
Ha Thi Dinh ◽  
Long Quoc Pham ◽  
Thuy Thu Tran
Keyword(s):  
Spectroscopic Data ◽  
2D Nmr ◽  
Garcinia Cowa ◽  
Reported Data

Seven tetraoxygenated xanthones, namely fuscaxanthone A,7-O-methylgarcinone E, cowagarcinone A, cowaxanthone, rubraxanthone, cowanin and cowanol, were isolated from the dichloromethane extract of the latex of Garcinia cowa_Roxb. ex Choisy. Their structures were elucidated on the basis of 1D, 2D NMR spectroscopic data and comparison with reported data.

scholarly journals BENZOPHENONE GLUCOSIDE ISOLATED FROM THE ETHYL ACETATE EXTRACT OF THE BARK OF MAHKOTA DEWA [Phaleria macrocarpa (Scheff.) Boerl.] AND ITS INHIBITORY ACTIVITY ON LEUKEMIA L1210 CELL LINE

2010 ◽  
Vol 9 (1) ◽  
pp. 142-145 ◽  
Author(s):  
Hendig Winarno ◽  
Ermin Katrin W
Keyword(s):  
Ethyl Acetate ◽  
Cell Line ◽  
Inhibitory Activity ◽  
Spectroscopic Analysis ◽  
Ethyl Acetate Extract ◽  
L1210 Cell ◽  
Activity Test ◽  
Physico Chemical ◽  
Phaleria Macrocarpa ◽  
Brown Powder

Isolation and elucidation of benzophenone glucoside from ethyl acetate extract of Phaleria macrocarpa bark and its inhibitory activity test against leukemia L1210 cell line have been done. The Phaleria macrocarpa bark were macerated using n-hexane, ethyl acetate, and ethanol, respectively. The ethyl acetate extract was then chromatographed on silica gel column and gradiently eluted by n-hexane - ethyl acetate - ethanol with the composition from 20:1:0 until 0:0:1, gave eight fractions. Separation of fraction 6 using semipreparative HPLC on reverse phase column (Capcell Pak C-18 SG120, 15 mm I.D. x 250 mm) using methanol - water (40:60, 5 mL/min) gave a brown powder, with the melting point of 182.3 ºC. Spectroscopic analysis and comparison of its physico-chemical data, this compound was clarified as 2,4'-dihydroxy-4-methoxy-benzophenone-6-O-b-D-glucopyranoside (3). Inhibitory activity of its compound against leukemia L1210 cell line showed that this compound exhibited inhibitory activity with IC50 was 5.1mg/mL.     Keywords: Phaleria macrocarpa, 2,4'-dihydroxy-4-methoxybenzophenone-6-O-b-D-glucopyranoside, cytotoxic activity, leukemia L1210

Nutrient composition of pulse-based recipe Sepu bari consumed in Himachal Pradesh, India

2015 ◽  
Vol 34 (4) ◽  
Author(s):  
Shweta Sharma ◽  
Rajju Priya Soni ◽  
Ashish Kumar
Keyword(s):  
Nutritional Quality ◽  
Reducing Sugars ◽  
Food Samples ◽  
Himachal Pradesh ◽  
Consumer Acceptability ◽  
Traditional Food ◽  
Traditional Foods ◽  
Overall Acceptability ◽  
Physico Chemical ◽  
Reported Data

The present study was undertaken with the objectives to document knowledge about the process/preparation of traditional foods i.e <italic>Sepu-bari</italic> of Mandi district, Himachal Pradesh and to evaluate the selected food recipes in relation to nutritional quality and consumer acceptability. Five blocks <italic>viz</italic>. Mandi-sadar, Karsog, Sundernagar, Chauntra and Seraj were selected. The selected traditional food samples were analysed for their physico-chemical chemical analysis showed that moisture content was highest in B<sub>3</sub> (8.80%) followed by B<sub>2</sub> (8.46), B<sub>5</sub>(8.36) B<sub>4</sub>(8.29) and B<sub>1</sub>(6.39%) . Reported data showed highest amount of crude fat in B<sub>4</sub> (26.96%), and protein in B<sub>3</sub> (23.60%) and lowest fat content in B<sub>2</sub> (21.75%) and lowest protein content in B<sub>1</sub>(21.74%) respectively. Crude fiber was maximum in B<sub>3</sub> & B<sub>1</sub> with same value (2.21%) & lowest in B<sub>2</sub> with value of 1.91%. Reducing sugars were calculated highest in B<sub>4</sub> (0.39%) and lowest in B<sub>1</sub> (0.27%). Organoleptic scoring revealed that maximum scores for taste, flavor, texture, and overall acceptability were obtained by B<sub>3</sub> <italic>sepu badi</italic> as 8.30, 8.20, 8.40 and 8.22 respectively.

scholarly journals SECONDARY METABOLITES PRODUCED BY MARINE BACTERIRUM MICROMONOSPORA SP. (G068)

2018 ◽  
Vol 54 (2C) ◽  
pp. 465
Author(s):  
Cao Duc Tuan
Keyword(s):  
Escherichia Coli ◽  
Secondary Metabolites ◽  
Spectroscopic Analysis ◽  
2D Nmr ◽  
Antimicrobial Activities ◽  
Culture Broth ◽  
Reported Data ◽  
Quang Ninh

Nine compounds (1-9) were isolated and characterized from the culture broth of the marinebacteria Micromonospora sp. (strain G068), which was isolated from sediment collected at CoTo – Quang Ninh. Their structures were determined by spectroscopic analysis including MS, 1DNMR and 2D NMR, as well as by comparison with reported data in the literature. Allcompounds were evaluated for their antimicrobial activities against a panel of clinicallysignificant microorganisms. Compounds 1, 6, and 9 selectively inhibited Escherichia coli withMIC values of 128, 128 and 64 μg/mL, respectively.

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