U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject Polygonum Remove constraint Subject: Polygonum Subject term Polygonum Remove constraint Subject term: Polygonum Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
Start Over

Search

319  Search Results

« Previous | 1 - 20 of 319 |
Number of results to display per page

Search Results

1. 12th IFDC 2017 Special Issue - Nutrient and phytonutrient profiles of some indigenous vegetables of Manipur, Northeast India

Author:
Bidyalakshmi Loukrakpam; Ananthan Rajendran; Daniella A.L. Chyne; T. Longvah
Source:
Journal of food composition and analysis 2019 v.79 pp. 12-22
ISSN:
0889-1575
Subject:
Parkia timoriana; Polygonum; Vicia faba; Wendlandia; calcium; catechin; copper; dietary fiber; epicatechin; folic acid; indigenous species; iron; magnesium; nutrient content; nutrient deficiencies; nutrients; phytonutrients; protein content; proximate composition; vegetables; India
Abstract:
... Manipur, a state in Northeastern India, has rich source of Indigenous plant foods for a sustainable and diverse diet. However, existing data on the nutrient composition of these plant foods is scarce. The purpose of this study was to identify the nutrient and phytonutrient composition of these Indigenous plant foods, which would eventually lead to a better understanding of their potential role in ...
DOI:
10.1016/j.jfca.2019.03.003

2. 2,2-Diphenyl-1-picrylhydrazyl radical-scavenging active components from Polygonum multiflorum Thunb

Author:
Chen, Y.; Wang, M.; Rosen, R.T.; Ho, C.T.
Source:
Journal of agricultural and food chemistry 1999 v.47 no.6 pp. 2226-2228
ISSN:
0021-8561
Subject:
gallic acid; Polygonum; stilbenes; chemical reactions; free radicals; medicinal plants; plant extracts; glucosides; catechin; roots; chemical structure
Abstract:
... An activity-directed fractionation and purification process was used to identify the antioxidative components of Polygonum multiflorum Thunb. (PM). Dried root of PM was extracted with 95% ethanol and then separated into water, ethyl acetate, and hexane fractions. Among these only the ethyl acetate phase showed strong antioxidant activity by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) test when compar ...
DOI:
10.1021/jf990092f
PubMed:
10794614

3. A Soil Probe System to Evaluate Weed Seed Survival in Soil Disinfestation Trials

Author:
Mark Hoffmann; Steven A. Fennimore
Source:
Weed technology 2017 v.31 no.5 pp. 752-760
ISSN:
1550-2740
Subject:
Cyperus esculentus; Polygonum; Portulaca oleracea; USDA; Urtica urens; bags; burning; chloropicrin; disinfestation; field experimentation; fumigants; fumigation; germination; heat; human resources; seeds; soil; steam; strawberries; tetrazolium; tubers; viability; weed control
Abstract:
... Weed seed viability is an important parameter to assess the efficacy of soil disinfestation methods like fumigation and steam. In field experiments, seed samples are commonly placed in permeable bags and buried at several depths in soil before the application of soil disinfestation treatments. The seed samples are recovered several days to weeks after treatment and then seed viability is determine ...

4. A bioactivity-guided study on the anti-diarrheal activity of Polygonum chinense Linn

Author:
Hai-Tao Xiao; Siu-Wai Tsang; Hong-Yan Qin; Franky F.K. Choi; Zhi-Jun Yang; Quan-Bin Han; Hu-Biao Chen; Hong-Xi Xu; Hong Shen; Ai-Ping Lu; Zhao-Xiang Bian
Source:
Journal of ethnopharmacology 2013 v.149 no.2 pp. 499-505
ISSN:
0378-8741
Subject:
Polygonum; animal models; antidiarrheal effect; chromatography; diarrhea; ellagic acid; enteritis; ethanol; fractionation; isolation techniques; magnesium; oral administration; traditional medicine; China
Abstract:
... ETHNOPHARMACOLOGICAL RELEVANCE: Polygonum chinense Linn., a folk medicine, has long been used for the treatment of diarrhea and enteritis in southwestern China. However, the components responsible for its anti-diarrheal activity are still poorly understood. AIM OF THE STUDY: To determine anti-diarrheal activities of Polygonum chinense L. and to identify its active components through bioactivity-gu ...
DOI:
10.1016/j.jep.2013.07.007
PubMed:
23895917

5. A comparative approach to understanding the ovule, seed, and fruit development in Bulbostylis (Cyperaceae: Cyperoideae: Abildgaardieae)

Author:
Andrea Guadalupe Reutemann; Sebastián Elias Muchut; Nora Graciela Uberti Manassero; André Luís Laforga Vanzela; María Gabriela López; Abelardo Carlos Vegetti; Ana Maria Gonzalez
Source:
Protoplasma 2022 v.259 no.1 pp. 141-153
ISSN:
0033-183X
Subject:
Cyperaceae; Polygonum; embryo sac; embryology; endosperm; exocarp; fruiting; mesocarp; microstructure; phylogeny; polyembryony; sclereids; taxonomy; testa
Abstract:
... In the present work, we study the ovule, seed, and fruit development in six Bulbostylis species in order to characterize the genus in a comparative approach and to identify the characteristics that can be used in taxonomy and phylogeny. Flowers and fruits at different developmental stages were analyzed using LM and SEM after processing according to standard techniques. The species studied have the ...
DOI:
10.1007/s00709-021-01649-7

6. A comparative assessment of pollen in modern vegetation and bat guano in Pipulbari Cave of Meghalaya, India

Author:
S.K. Basumatary; Swati Tripathi; Abdul Jalil; Azizur Rahman
Source:
Review of palaeobotany and palynology 2020 v.274 pp. 104157
ISSN:
0034-6667
Subject:
Bombax; Brassica; Chiroptera; Cyperaceae; Duabanga; Mesua; Nymphaea; Polygonum; Shorea; animal manures; cropland; deciduous forests; foraging; landscapes; paleoecology; palynology; pollen; pollen rain; principal component analysis; soil; wetlands; India
Abstract:
... This study presents a palynological examination of modern bat guano to understand the quality of pollen preservation in relation to the extant vegetation in and around the vicinity of the Pipulbari Cave. Surface soil samples from the nearby forest, cropland and wetland areas were also studied for the comparison of pollen rain in relation to the current vegetation and landscape in the region. The p ...
DOI:
10.1016/j.revpalbo.2020.104157

7. A member of a new Tospovirus species isolated in Italy from wild buckwheat (Polygonum convolvulus)

Author:
Ciuffo, M.; Tavella, L.; Pacifico, D.; Masenga, V.; Turina, M.
Source:
Archives of virology 2008 v.153 no.11 pp. 2059-2068
ISSN:
0304-8608
Subject:
tomatoes; Iris yellow spot tospovirus; Polygonum; Fallopia convolvulus; host range; antibodies; electron microscopy; nucleocapsid; viruses; immunologic techniques; intergenic DNA; buckwheat; Italy
Abstract:
... Electron microscopy of extracts from diseased Polygonum convolvulus plants from Piedmont (Italy) revealed particles with the morphological features of a tospovirus. Sequencing of the full-length small (S) and medium (M) genome segments indicated that the virus is a member of a new Tospovirus species provisionally named Polygonum ringspot virus. A feature distinguishing it from members of other Tos ...
DOI:
10.1007/s00705-008-0228-1
PubMed:
18953484

8. A new ellagic acid derivative from Polygonum runcinatum

Author:
Zhi-Hong Zhou; Min-Zhuo Liu; Meng-Hua Wang; Wei Qu; Jian-Bo Sun; Jing-Yu Liang; Fei-Hua Wu
Source:
Natural product research 2015 v.29 no.9 pp. 795-799
ISSN:
1478-6427
Subject:
Polygonum; antioxidant activity; ellagic acid; roots; spectroscopy
Abstract:
... A new ellagic acid derivative, 3,3′-dimethylellagic acid-4′- O -(6″-galloyl)-β- d -glucoside, named runcinatside (5), together with four known compounds 3,3′-dimethylellagic acid (1), 3,3′,4′-trimethylellagic acid (2), 3,3′-dimethylellagic acid-4′- O -β- d -glucoside (3) and 3-methylellagic acid-4′- O -α- l -rhamno-pyranoside (4), was isolated from the roots of Polygonum runcinatum Buch.-Ham. ex D ...
DOI:
10.1080/14786419.2014.986727

9. A warm-temperate forest of mixed coniferous type from the upper Pliocene Sanying Formation (southeastern edge of Tibetan Plateau) and its implications for palaeoecology and palaeoaltimetry

Author:
Yong-Jiang Huang; Lin-Bo Jia; Tao Su; Hai Zhu; Arata Momohara; Zhi-Jia Gu; Zhe-Kun Zhou
Source:
Palaeogeography, palaeoclimatology, palaeoecology 2020 v.538 pp. 109486
ISSN:
0031-0182
Subject:
Abies; Amaranthaceae; Aralia; Carex; Picea; Pinus armandii; Pliocene epoch; Polygonum; Quercus; Rhododendron; Rubus; Sambucus; Tsuga; Zanthoxylum; altitude; basins; broadleaved evergreen forests; charcoal; coniferous forests; conifers; dry climates; ecoregions; fossils; mountains; paleoecology; plant communities; pollen; topographic slope; China
Abstract:
... Coniferous forests represent one of the most important vegetation types in the southern Hengduan Mountains on southeastern edge of the Tibetan Plateau, but their evolutionary history remains poorly understood. Here, we report an upper Pliocene charcoal assemblage from the Sanying Formation at Fudong in the Lanping Basin, which represents remains of a mixed coniferous forest. Taxonomic studies indi ...
DOI:
10.1016/j.palaeo.2019.109486

10. Absolute configuration assignment of an unusual homoisoflavanone from Polygonum ferrugineum using a combination of chiroptical methods

Author:
João M. Batista; Bo Wang; María V. Castelli; Ewan W. Blanch; Silvia N. López
Source:
Tetrahedron letters 2015 v.56 pp. 6142-6144
ISSN:
0040-4039
Subject:
Polygonum; chemical reactions; chemical structure; organic compounds; risk; spectroscopy
Abstract:
... The absolute configuration of the homoisoflavanone 5,7-dihydroxy-6-methoxy-3-(9-hydroxy-phenylmethyl)-chroman-4-one (1), found in Polygonum species, has been determined as 3R,9R by using a combination of electronic and vibrational chiroptical spectroscopic methods. The experimental spectra were interpreted with the aid of density functional theory calculations. The risks of relying upon a single m ...
DOI:
10.1016/j.tetlet.2015.09.102

11. Accumulation of Perchlorate in Aquatic and Terrestrial Plants at a Field Scale

Author:
Kui Tan; Todd A. Anderson; Matthew W. Jones; Philip N. Smith; W. Andrew Jackson
Source:
Journal of environmental quality 2004 v.33 no.5 pp. 1638-1646
ISSN:
1537-2537
Subject:
Broussonetia papyrifera; Celtis laevigata; Fraxinus; Melia azedarach; Nasturtium; Polygonum; Salix nigra; Ulmus parvifolia; environmental factors; exposure duration; leaching; leaves; macrophytes; mulberries; perchlorates; plant litter; plant tissues; rain; streams; trees; water table; watercress
Abstract:
... Previous laboratory-scale studies have documented perchlorate ClO⁻ ₄ uptake by different plant species, but less information is available at field scale, where ClO⁻ ₄ uptake may be affected by environmental conditions, such as distance to streams or shallow water tables, exposure duration, and species. This study examined uptake of ClO⁻ ₄ in smartweed (Polygonum spp.) and watercress (Nasturtium sp ...
DOI:
10.2134/jeq2004.1638

12. Accumulation of microcystin congeners in different aquatic plants and crops – A case study from lake Amatitlán, Guatemala

Author:
Claudia Suseth Romero-Oliva; Valeska Contardo-Jara; Tobias Block; Stephan Pflugmacher
Source:
Ecotoxicology and environmental safety 2014 v.102 pp. 121-128
ISSN:
0147-6513
Subject:
Capsicum annuum; Eichhornia crassipes; Hydrilla verticillata; Microcystis aeruginosa; Polygonum; Solanum lycopersicum; Typha; aquatic plants; bioaccumulation factor; case studies; crops; fruits; lakes; microcystins; monitoring; Guatemala
Abstract:
... Microcystins (MCs) fate in natural environments can lead to its transfer into aquatic organisms, e.g. aquatic plants. Moreover, lakes in several countries sustain agriculture activities posing a serious health threat for the public. The case of Lake Amatitlán in Guatemala, was addressed to better understand MCs accumulation of four aquatic plants (Polygonum portoricensis, Eichhornia crassipes, Typ ...
DOI:
10.1016/j.ecoenv.2014.01.031

13. Acetylcholinesterase-Inhibitory Activity of Linarin from Buddleja davidii, Structure-Activity Relationships of Related Flavonoids, and Chemical Investigation of Buddleja nitida

Author:
Fan, Peihong; Hay, Anne-Emmanuelle; Marston, Andrew; Hostettmann, Kurt
Source:
Pharmaceutical biology 2008 v.46 no.9 pp. 596-601
ISSN:
1388-0209
Subject:
Reynoutria japonica; Polygonum; chemical constituents of plants; plant extracts; Ambrosia artemisiifolia; high performance liquid chromatography; cholinesterase inhibitors; structure-activity relationships; flavonoids; mass spectrometry; acetylcholinesterase; invasive species; leaves; ornamental plants; Heracleum mantegazzianum; chemical analysis; Buddleja davidii; thin layer chromatography; Panama
DOI:
10.1080/13880200802179592

14. Activity of some Nile River aquatic macrophyte extracts against the cyanobacterium Microcystis aeruginosa

Author:
MM El-Sheekh; AM Haroon; S Sabae
Source:
African journal of aquatic science 2017 v.42 no.3 pp. 271-277
ISSN:
1727-9364
Subject:
Ceratophyllum demersum; Eichhornia crassipes; Microcystis aeruginosa; Polygonum; Saccharum spontaneum; active ingredients; algae; chemical constituents of plants; ethanol; macrophytes; plant extracts; polyphenols; screening; solvents; Egypt; Nile River
Abstract:
... The anti-algal activity of five macrophyte extracts on the cyanobacterium Microcystis aeruginosa in Egypt was investigated in 2013. Extract activity varied according to plant type, extracting solvent and its concentration. The highest inhibitory activity was achieved with ethanol extract at a concentration of 80 mg l⁻¹, followed by chloroformic extracts, at 60 mg l⁻¹. Methanolic extracts of Eichho ...
DOI:
10.2989/16085914.2017.1358138

15. Adaptive Transgenerational Plasticity in an Annual Plant: Grandparental and Parental Drought Stress Enhance Performance of Seedlings in Dry Soil

Author:
Jacob J. Herman; Sonia E. Sultan; Tim Horgan-Kobelski; Charlotte Riggs
Source:
Integrative and comparative biology 2012 v.52 no.1 pp. 77-88
ISSN:
1540-7063
Subject:
Persicaria maculosa; Polygonum; annuals; biomass; drought; drought tolerance; evolution; genetic lines; grandparents; inheritance (genetics); phenotype; plant adaptation; progeny; root systems; seedlings; soil; survival rate; water stress
Abstract:
... Stressful parental (usually maternal) environments can dramatically influence expression of traits in offspring, in some cases resulting in phenotypes that are adaptive to the inducing stress. The ecological and evolutionary impact of such transgenerational plasticity depends on both its persistence across generations and its adaptive value. Few studies have examined both aspects of transgeneratio ...
DOI:
10.1093/icb/ics041

16. Additions and Range Extensions to the Vascular Plant Flora of the Continental Northwest Territories and Nunavut, Canada, II

Author:
William J. Cody; Kenneth L. Reading; Jennifer M. Line
Source:
Canadian field-naturalist 2003 v.117 no.3 pp. 448-465
ISSN:
0008-3550
Subject:
Carex; Crepis tectorum; Danthonia spicata; Deschampsia; Draba; Halenia; Polemonium boreale; Polygonum; Potentilla; Ranunculus aquatilis; Salix; Silene; Vaccinium; flora; national parks; new geographic records; organisms; Northwest Territories; Nunavut
Abstract:
... Based on field reconnaissance since the publication of Flora of the Continental Northwest Territories in 1980, particularly in the District of Keewatin and northeastern District of Mackenzie (Nunavut) and Nahanni National Park, information is provided on geographically significant plant occurrences. One new taxon, Polemonium boreale forma albiflorum, is described, fourteen native taxa are reported ...
DOI:
10.22621/cfn.v117i3.749

17. Adsorption of Pb(II) on activated carbon prepared from Polygonum orientale Linn.: Kinetics, isotherms, pH, and ionic strength studies

Author:
Wang, Li; Zhang, Jian; Zhao, Ran; Li, Ye; Li, Cong; Zhang, Chenglu
Source:
Bioresource technology 2010 v.101 no.15 pp. 5808-5814
ISSN:
0960-8524
Subject:
Fourier transform infrared spectroscopy; Polygonum; activated carbon; adsorption; aqueous solutions; desorption; ionic strength; ions; models; pH; phosphoric acid; sorption isotherms; surface area
Abstract:
... Low-cost activated carbon was prepared from Polygonum orientale Linn. (PL) by phosphoric acid activation. Its ability to adsorb Pb(II) ions from aqueous solutions was examined. Through SEM, XRD, BET, and FTIR analyses, the PL-activated carbon (PLAC) was found to have a porous structure with a surface area of about 1400m²/g. Carboxyl groups played an important role in the adsorption of Pb(II) throu ...
DOI:
10.1016/j.biortech.2010.02.099
PubMed:
20362430

18. Allozyme variation in the Polygonum lapathifolium complex

Author:
Consaul, L.L.; Warwick, S.I.; McNeill, J.
Source:
Canadian journal of botany 1991 v.69 no.10 pp. 2261-2270
ISSN:
1480-3305
Subject:
chemical composition; Polygonum; enzyme polymorphism; Persicaria lapathifolia; genetic distance; Persicaria maculosa; Persicaria pensylvanica; genetic variation; allozymes; chemotaxonomy; Europe; North America
DOI:
10.1139/b91-284

19. Alpine Annual Plants: Phenology, Germination, Photosynthesis, and Growth of Three Rocky Mountain Species

Author:
Douglas N. Reynolds
Source:
Ecology 1984 v.65 no.3 pp. 759-766
ISSN:
0012-9658
Subject:
Polygonum; air; annuals; bogs; carbon dioxide; germination; growing season; habitats; laboratory experimentation; leaves; melting; phenology; photosynthesis; physiological response; seeds; soil; temperate zones; temperature; Arctic region; Rocky Mountain region
Abstract:
... Field microenvironments of three annual alpine species, Koenigia islandica, Polygonum confertiflorum, and P. douglasii, were characterized over two growing seasons. Germination, photosynthesis, and growth of all three species were investigated in field and laboratory experiments. The Polygonum species occurred in warm, dry alpine sites which melted out early in the growing season but also dried ou ...
DOI:
10.2307/1938048

20. An Analysis of Elemental Concentrations in Vegetation Bordering a Southeastern United States Coastal Plain Stream

Author:
Charels T. Garten Jr.; John B. Gentry; Rebecca R. Sharitz
Source:
Ecology 1977 v.58 no.5 pp. 979-992
ISSN:
0012-9658
Subject:
Alnus; Andropogon; Morella cerifera; Polygonum; Sagittaria latifolia; Salix nigra; Scirpus; alluvial soils; aluminum; autumn; boron; calcium; coastal plains; copper; discriminant analysis; elemental composition; floodplains; interspecific variation; leaves; magnesium; molybdenum; potassium; principal component analysis; roots; seasonal variation; seeds; sodium; spring; stems; streams; strontium; vegetation; woody plants; zinc; South Carolina
Abstract:
... Mineral element concentrations were measured in the component parts of different species of plants from a floodplain community along a coastal plain stream in South Carolina, USA. Frequency distributions of concentrations of mineral elements were positively skewed, although distributions of P, K, Ca and B concentrations tended to be less skewed than those of some trace elements (Na, Al, Cs—137). S ...
DOI:
10.2307/1936919