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Journal of natural products
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biomass
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- Author:
- Haiyin He; ShiBiao Wu; Paul G. Wahome; Matthew J. Bertin; Anna C. Pedone; Kevin R. Beauchesne; Peter D. R. Moeller; Guy T. Carter
- Source:
- Journal of natural products 2018 v.81 no.6 pp. 1368-1375
- ISSN:
- 1520-6025
- Subject:
- Microcystis aeruginosa; anticarcinogenic activity; biomass; cytotoxicity; harvesting; human cell lines; humans; ions; lipophilicity; microcystin-LR; neoplasm cells; neoplasms; nuclear magnetic resonance spectroscopy; tyrosine
- Abstract:
- ... Four new microcystin congeners are described including the first three examples of microcystins containing the rare doubly homologated tyrosine residue 2-amino-5-(4-hydroxyphenyl)pentanoic acid (Ahppa) (1–4). Large-scale harvesting and biomass processing allowed the isolation of substantial quantities of these compounds, thus enabling complete structure determination by NMR as well as cytotoxicity ...
- DOI:
- 10.1021/acs.jnatprod.7b00986
- https://doi.org/10.1021/acs.jnatprod.7b00986
- Author:
- Isabelle Rajotte; Cheryl Rafuse; Elliott J. Wright; John C. Achenbach; Lee D. Ellis; Pearse McCarron
- Source:
- Journal of natural products 2019 v.82 no.7 pp. 1945-1952
- ISSN:
- 1520-6025
- Subject:
- Danio rerio; Gonyaulax; biomass; hydroxylation; liquid chromatography; mass spectrometry; nuclear magnetic resonance spectroscopy; solvents; toxicity; yessotoxin
- Abstract:
- ... Liquid chromatography–high-resolution mass spectrometry (LC-HRMS) analysis of a Namibian strain of Gonyaulax spinifera showed the presence of a number of yessotoxins (YTXs). Principal among these were YTX (1), homoYTX (2), and a tentative hydroxylated analogue that did not correspond to any previously confirmed YTX structures. Culturing the G. spinifera strain afforded sufficient biomass for purif ...
- DOI:
- 10.1021/acs.jnatprod.9b00318
- https://doi.org/10.1021/acs.jnatprod.9b00318
- Author:
- Vijay Raghavan; Jordan L. Johnson; Donald F. Stec; Bongkeun Song; Grzegorz Zajac; Malgorzata Baranska; Constance M. Harris; Nathan D. Schley; Prasad L. Polavarapu; Thomas M. Harris
- Source:
- Journal of natural products 2018 v.81 no.12 pp. 2654-2666
- ISSN:
- 1520-6025
- Subject:
- X-ray diffraction; anaerobic ammonium oxidation; biomass; bioreactors; crystallography; esters; high performance liquid chromatography; optical properties; quantum mechanics; spectroscopy
- Abstract:
- ... We have isolated mixtures of [5]- and [3]-ladderanoic acids 1a and 2a from the biomass of an anammox bioreactor and have separated the acids and their phenacyl esters for the first time by HPLC. The absolute configurations of the naturally occurring acids and their phenacyl esters are assigned as R at the site of side-chain attachment by comparison of experimental specific rotations with correspon ...
- DOI:
- 10.1021/acs.jnatprod.8b00458
- https://doi.org/10.1021/acs.jnatprod.8b00458
- Author:
- Ming Zhao; Brian Guo; Michael M. Onakpa; Tiffany Wong; Kyo Wakasa; Chun-Tao Che; Katherine Warpeha
- Source:
- Journal of natural products 2017 v.80 no.12 pp. 3314-3318
- ISSN:
- 1520-6025
- Subject:
- Arabidopsis thaliana; Icacina; Oryza sativa; anthocyanins; biomass; broadleaf weeds; chlorophyll; dimethyl sulfoxide; diterpenoids; ethyl acetate; growers; herbicidal properties; leaf development; panicles; rice; seed germination; seedling growth; seedlings; seeds; tubers
- Abstract:
- ... Broadleaf weeds are very costly for crop growers. Additional herbicidal compounds need to be obtained, especially from natural sources. Extracts of Icacina trichantha were evaluated for responses in germinating seeds and seedlings of rice (Oryza sativa) and Arabidopsis (Arabidopsis thaliana). An ethyl acetate fraction of I. trichantha tuber and a diterpenoid constituent, icacinol (1), were found t ...
- DOI:
- 10.1021/acs.jnatprod.7b00668
- PubMed:
- 29227099
- PubMed Central:
- PMC6639824
- https://doi.org/10.1021/acs.jnatprod.7b00668
- Author:
- Preisitsch Michael; Niedermeyer Timo H. J.; Heiden Stefan E.; Neidhardt Inga; Kumpfmüller Jana; Wurster Martina; Harmrolfs Kirsten; Wiesner Christoph; Enke Heike; Müller Rolf; Mundt Sabine
- Source:
- Journal of natural products 2016 v.79 no.1 pp. 106-115
- ISSN:
- 1520-6025
- Subject:
- Cyanobacterium (genus); Cylindrospermum stagnale; Nostoc; Streptococcus pneumoniae; alkylresorcinols; antibiotic resistance; biomass; carbon; chlorination; high performance liquid chromatography; inhibitory concentration 50; methicillin; methicillin-resistant Staphylococcus aureus; minimum inhibitory concentration; nuclear magnetic resonance spectroscopy; screening; solvents; toxicity
- Abstract:
- ... A rapid and exhaustive one-step biomass extraction as well as an enrichment and cleanup procedure has been developed for HPLC-UV detection and quantification of closely related [7.7]paracyclophanes and structural derivatives based on a two-phase solvent system. The procedure has been validated using the biomass of the carbamidocyclophane- and cylindrocyclophane-producing cyanobacterium Nostoc sp. ...
- DOI:
- 10.1021/acs.jnatprod.5b00768
- https://doi.org/10.1021/acs.jnatprod.5b00768
6. Rice Bran Protein as a Potent Source of Antimelanogenic Peptides with Tyrosinase Inhibitory Activity
- Author:
- Ochiai Akihito; Tanaka Seiya; Tanaka Takaaki; Taniguchi Masayuki
- Source:
- Journal of natural products 2016 v.79 no.10 pp. 2545-2551
- ISSN:
- 1520-6025
- Subject:
- Oryza sativa; amino acid sequences; biomass; byproducts; chymotrypsin; cytotoxicity; hydrolysates; melanogenesis; melanoma; mice; peptides; rice bran; skin diseases; staple foods; trypsin; tyrosine; wastes
- Abstract:
- ... Rice (Oryza sativa) is consumed as a staple food globally, and rice bran, the byproduct, is an unused biomass that is ultimately discarded as waste. Thus, in the present study, a technique for producing tyrosinase inhibitory peptides from rice bran protein (RBP) was developed. Simultaneous treatment of RBP with chymotrypsin and trypsin produced numerous peptides. Subsequently, six tyrosinase inhib ...
- DOI:
- 10.1021/acs.jnatprod.6b00449
- https://doi.org/10.1021/acs.jnatprod.6b00449
- Author:
- Lakornwong Waranya; Kanokmedhakul Kwanjai; Kanokmedhakul Somdej; Kongsaeree Palangpon; Prabpai Samran; Sibounnavong Phoutthasone; Soytong Kasem
- Source:
- Journal of natural products 2014 v.77 no.7 pp. 1545-1553
- ISSN:
- 1520-6025
- Subject:
- Ganoderma; Plasmodium falciparum; X-ray diffraction; antimalarials; biomass; ergosterol; fungi; inhibitory concentration 50; lactones; spectroscopy; triterpenoids
- Abstract:
- ... A revised structure of colossolactone G (1), seven new triterpene lactones, ganodermalactones A–G (2–8), and five known triterpene lactones, colossolactone I (9), schisanlactone B (10), colossolactone B (11), colossolactone E (12), and colossolactone IV (13), and ergosterol have been isolated from cultured biomass of the macrofungi Ganoderma sp. KM01. Their structures were identified by spectrosco ...
- DOI:
- 10.1021/np400846k
- https://doi.org/10.1021/np400846k
- Author:
- Araya Juan J.; Kindscher Kelly; Timmermann Barbara N.
- Source:
- Journal of natural products 2012 v.75 no.3 pp. 400-407
- ISSN:
- 1520-6025
- Subject:
- Asclepias syriaca; anticarcinogenic activity; biomass; breast neoplasms; breasts; cardiac glycosides; cytotoxicity; flavonoids; glycosylation; inhibitory concentration 50; lignans; secondary metabolites; triterpenoids
- Abstract:
- ... Phytochemical investigation of the dried biomass of Asclepias syriaca afforded five new compounds (1–5), along with 19 known structures. Overall, the secondary metabolites isolated and identified from this plant showed a wide structural diversity including pentacyclic triterpenes, cardiac glycosides, flavonoid glycosides, lignans, a phenylethanoid, and a glycosylated megastigmane. In addition, the ...
- DOI:
- 10.1021/np2008076
- https://doi.org/10.1021/np2008076