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Results 201 - 250 of 1053
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Könczöl Arpád - - 2011
Although Artemisia gmelinii Webb. ex Stechm. has long been used in south and south-east Asia to treat many kinds of inflammatory diseases, up until now its bioactivity-coupled phytochemical characterization has not been reported. We identified one fraction of the methanolic extract of A. gmelinii as a hit in our antioxidant ...
Shahwar Durre - - 2011
In the search of new trypsin inhibitors caffeic acid (1), cinnamic acid (2), gallic acid (3) and eugenol (4) from Cinnamomum zeylanicum, ferulic acid (5) from Impatiens bicolor, vanillin (6) from Melia azedarach and catechol (7) from Allium cepa were isolated through bioassay guided fractionation of the plant extracts. IC ...
Shetty Radhakrishna R - - 2011
Application of 3.6 mM silicon (Si+) to the rose cultivar Smart increased the concentration antimicrobial phenolic acids and flavonoids in response to infection by rose powdery mildew (Podosphaera pannosa). Simultaneously, the expression of genes coding for key enzymes in the phenylpropanoid pathway (phenylalanine ammonia lyase, cinnamyl-alcohol dehydrogenase and chalcone synthase) ...
Kuga Milton Carlos - - 2011
OBJECTIVE: The objective of this study was to evaluate the penetration of 2.5% NaOCl associated with 17.0% EDTA, 1.0% citric acid, and 1.0% peracetic acid into dentin tubules. STUDY DESIGN: The roots of 44 bovine incisors were cross-sectioned and 5-mm-long fragments were produced from their middle thirds. The specimens were ...
Meesapyodsuk Dauenpen - - 2011
Very long chain polyunsaturated fatty acids such as arachidonic acid (ARA, 20:4n-6), eicosapentaenoic acid (EPA, 20:5n-3), docosapentaenoic acid (DPA, 22:5n-3) and docosahexaenoic acid (DHA, 22:6n-3) are essential components of cell membranes, and are precursors for a group of hormone-like bioactive compounds (eicosanoids and docosanoids) involved in regulation of various physiological ...
Guarnerio Chiara Francesca - - 2011
Echinacea angustifolia cell suspension cultures are usually grown and maintained in the dark, but we also exposed cells to light for one culture cycle (14 days) and then compared the metabolomes of dark-grown and illuminated cells by liquid chromatography-mass spectrometry. Among 256 signals, we putatively identified 159 molecules corresponding to 56 ...
Warren Charles R - - 2011
• The quantitative significance of amino acids to plant nutrition remains controversial. This experiment determined whether post-uptake metabolism and root to shoot export differ between glycine and glutamine, and examined implications for estimation of amino acid uptake. • Field soil containing a Eucalyptus pauciflora seedling was injected with uniformly (13) ...
Cobankara Funda Kont - - 2011
OBJECTIVE: The objective of this in vitro study was to assess the effect of several chelating agents on the mineral content of root dentin. STUDY DESIGN: Extracted human mandibular incisor roots were prepared and divided into groups according to the following irrigation protocols: 1) 17% ethylenediaminetetraacetic acid (EDTA); 2) 10% ...
Moreno-Pérez Antonio J - - 2011
Acyl-acyl carrier protein (ACP) thioesterases are enzymes that control the termination of intraplastidial fatty acid synthesis by hydrolyzing the acyl-ACP complexes. Among the different thioesterase gene families found in plants, the FatA-type fulfills a fundamental role in the export of the C18 fatty acid moieties that will be used to ...
Djebbar Reda - - 2011
To investigate the role of plant mitochondria in drought tolerance, the response to water deprivation was compared between Nicotiana sylvestris wild type (WT) plants and the CMSII respiratory complex I mutant, which has low-efficient respiration and photosynthesis, high levels of amino acids and pyridine nucleotides, and increased antioxidant capacity. We ...
Abdelkafi Fatma - - 2011
Alfa grass lignin obtained by the acetic acid/formic acid/water CIMV pulping process was characterized by FTIR and (1)H, (13)C-(1)H 2D HSQC, and (31)P NMR spectroscopies. Lignin samples purified by further dissolution/precipitation or basic hydrolysis steps were also analyzed. The CIMV alfa lignin is a mixture of low molar mass compounds ...
Xu Xiao-Yu - - 2011
Nine compounds were isolated from the leaves of Anthocephalus chinensis by column chromatography on silica gel and Sephadex LH-20, and their structures were elucidated by spectroscopic techniques as clethric acid-28-O-β-d-glucopyranosyl ester (1), mussaendoside T (2), β-stigmasterol (3), hederagenin (4), ursolic acid (5), clethric acid (6), 3β,6β,19α,24-tetrahydroxyurs-12-en-28-oic acid (7), mussaendoside I ...
Tsuda Hirohisa - - 2012
During the investigation of the metabolism of (14)C-acetate or (14)C-succinate in rice seedlings, an unknown organic acid (X) with a high specific radioactivity was detected in 10,000 × g 30 min precipitate-fraction of rice roots. The X was hardly extracted by 0.1 N-H(2)SO(4) boiling, but was extracted by 0.5 N-KOH boiling. The X was co-chromatographed ...
Cieślik Ewa - - 2011
Introduction. Jerusalem artichoke (Helianthus tuberosus L.) is grown primarily for its edible tubers, which were first cultivated by native Americans before the arrival of the Europeans. Unlike most tubers, but in common with other members of the Asteraceae, the tubers store fructans instead of starch. Fructans are non-digestible carbohydrates considered ...
Hanh Tran Thi Hong - - 2011
To identify inhibitors of nitric oxide production and NF-κB activity from Chromolaena odorata (C. odorata). The compounds isolated from the aerial parts of C. odorata by bioassay-guided fractionation were investigated for their inhibitory effects on the NO production and NF-κB activity in LPS-stimulated RAW264.7 cells. Six fatty acids (S)-coriolic acid ...
Nabais Cristina - - 2011
This work aimed to compare the allocation of Al, Fe, Cu, Ni, amino acids and sugars in different fractions of root cells of Paspalum notatum with 21 and 120 days old grown in quartz sand. In general younger roots showed a higher content of Al, Fe, Cu Ni, amino acids ...
Ochieng' Charles O - - 2011
The chloroform and ethyl acetate extract (100mg/kg) of Caesalpinia volkensii H. exhibited significant (P≤0.05) antinociceptive activities using hot plate and writhing tests in mice while the later showed antiplasmodial activity (IC(50) 0.23±0.07 and 4.39±2.49μg/ml) against chloroquine sensitive (D6) and chloroquine-resistant (W2), respectively. Two new furanoditerpenes [rel. 1β,5α-dihydroxyvoucapane (1) and rel. ...
Reboul Rebecca - - 2011
UDP-glucose dehydrogenase (UGD) plays a key role in the nucleotide sugar biosynthetic pathway, as its product UDP-glucuronic acid is the common precursor for arabinose, xylose, galacturonic acid, and apiose residues found in the cell wall. In this study we characterize an Arabidopsis thaliana double mutant ugd2,3 that lacks two of ...
Selvakumar Jayaraman - - 2011
Activation of imide carbonyl group with trifluoromethanesulfonic acid facilitates the intramolecular cyclization of phenethylphthalimides to give a fused isoindoloisoquinolinone skeleton. The first one pot regioselective synthesis of isoindoloisoquinolinone alkaloid (±)-nuevamine has been successfully executed using this methodology.
Grechkin Alexander N - - 2011
The allene oxide synthase (AOS) pathway is widespread in plants. Its products, such as cyclopentenone 12-oxo-10,15-phytodienoic acid (12-oxo-PDA) and related jasmonates, play important biological roles in plants. We found that 12-oxo-PDA in some plant tissues co-occur with an unknown minor oxylipin 1. In vitro incubations of AOSs with α-linolenic acid ...
Teichmann Beate - - 2011
Flocculosin and ustilagic acid (UA), two highly similar antifungal cellobiose lipids, are respectively produced by Pseudozyma flocculosa, a biocontrol agent, and Ustilago maydis, a plant pathogen. Both glycolipids contain a short-chain fatty acid hydroxylated at the β position but differ in the long fatty acid, which is hydroxylated at the ...
Fait Aaron - - 2011
In seeds, glutamate decarboxylase (GAD) operates at the metabolic nexus between carbon and nitrogen metabolism by catalyzing the unidirectional decarboxylation of glutamate to form γ-aminobutyric acid (GABA). To elucidate the regulatory role of GAD in seed development, we generated Arabidopsis (Arabidopsis thaliana) transgenic plants expressing a truncated GAD from Petunia ...
Liu Dongping - - 2011
Src homology-2 domain-containing protein tyrosine phosphatase (Shp2), a novel proto-oncogenic protein, is an important target in cancer therapy research. Approximately 2000 plant extracts were screened to find its natural specific inhibitors, with the ethyl acetate (EtOAc) active extract of the root of Angelica dahurica showing considerable inhibitory effects (IC(50)=21.6mg/L). Bioguided ...
Bocianowski Jan - - 2012
One of the goals in oilseed rape programs is to develop genotypes producing oil with low linolenic acid content (C18:3, ≤3%). Low linolenic mutant lines of canola rapeseed were obtained via chemical mutagenesis at the Plant Breeding and Acclimatization Institute - NRI, in Poznan, Poland, and allele-specific SNP markers were ...
Sayanova Olga - - 2011
The role of acyl-CoA-dependent Δ6-desaturation in the heterologous synthesis of omega-3 long-chain polyunsaturated fatty acids was systematically evaluated in transgenic yeast and Arabidopsis thaliana. The acyl-CoA Δ6-desaturase from the picoalga Ostreococcus tauri and orthologous activities from mouse (Mus musculus) and salmon (Salmo salar) were shown to generate substantial levels of ...
Watanabe Masayuki - - 2011
The glucosylceramide components were characterized in the 33 species of the grass family (Poaceae). Pooideae contained 4-hydroxy-8-sphingenines [i.e., t18:1(8Z) plus t18:1(8E)] as major components, the relative levels of t18:1(8Z) being higher than those of the 8-E isomers. 2-Hydroxy arachidic acid was a major component in all species other than Pooideae, ...
Gillies Peter J - - 2011
Omega-3 fatty acid research, which began as an epidemiologic curiosity, has generated perhaps the strongest dataset for any nutrient in regard to cardiovascular disease risk reduction. Although once a relatively descriptive field, advances in analytic techniques have opened up the biochemistry of omega-3 fatty acids and nutritional genomics in plants ...
Wen Qi - - 2011
A new triterpenoid saponin acylated with monoterpenic acid, together with two known triterpenoid saponins, has been isolated from the fruit of Gymnocladus chinensis Baill. Their structures were elucidated as 2β,23-dihydroxy-3-O-α-L-rhamnopyranosyl-21-O-{(6S)-2-trans-2,6-dimethyl-6-O-[3-O-(β-D-glucopyranosyl)-4-O-((6S)-2-trans-2,6-dimethyl-6-hydroxy-2,7-octadienoyl)-β-L-arabinopyranosyl]-2,7-octadienoyl}-acacic acid 28-O-β-D-xylopyranosyl-(1 → 3)-β-D-xylopyranosyl-(1 → 4)-α-L-rhamnopyranosyl-(1 → 2)-[α-L-rhamnopyranosyl-(1 → 6)]-β-D-glucopyranosyl ester (1), gymnocladus saponin E (2), and gymnocladus saponin F(2) (3).
Patel Dinesh Kumar - - 2011
Pedalium murex Linn (family: Pedaliaceae) (P. murex) commonly known as Large Caltrops and Gokhru (India) is a shrub found in the Southern part, Deccan region of India and in some parts of Ceylon. Different parts of the plant are used to treat various ailments like, cough, cold and as an ...
Canakci Songül - - 2011
The present study examined the effects of salicylic acid pre-application on the responses of seven-day-old chickpea (Cicer arietinum L.) seedlings to nickel. For this purpose, the plants were treated with 1 mM salicylic acid solution for 6 and 10 hours and then treated with 0.75, 1.5 and 3 mM nickel ...
Freitas Cristina Setim - - 2011
H+, K(+)-ATPase enzyme is a therapeutic target for the treatment of gastric disturbances. Several medicinal plants and isolated compounds inhibit the acid gastric secretion through interaction with the proton pump. In order to add new properties to some natural constituents, five compounds, a benzylated derivative of vincoside, a diterpene (abietic ...
Halmemies-Beauchet-Filleau A - - 2011
Five multiparous Finnish Ayrshire cows fed red clover silage-based diets were used in a 5 × 5 Latin square with 21-d experimental periods to evaluate the effects of various plant oils or camelina expeller on animal performance and milk fatty acid composition. Treatments consisted of 5 concentrate supplements containing no ...
Jaiswal Rakesh - - 2011
In this study, liquid chromatography-tandem mass spectrometry (LC-MS(n) ; n = 2-3) has been used to characterize and distinguish chlorogenic acid lactones from cinnamoylshikimate esters. This is the first time when an LC-MS(n) method has been developed to distinguish between these two isomeric classes of compounds formed in particular in food processing ...
Kosińska Agnieszka - - 2011
Phenolic compounds were extracted from defatted flaxseeds using ethanol-dioxane (1:1, v/v). The crude extract obtained was purified using Amberlite XAD-16 column chromatography with water and methanol as mobile phases. RP-HPLC and SE-HPLC showed a lignan macromolecule (LM) as a dominant phenolic compound in the purified extract. After the alkaline hydrolysis ...
Zhang Jin-jie - - 2011
Three cooking methods, namely boiling, steaming, and stir-frying for 5 to 10 min, were used to evaluate the effect on nutrient components, free amino acids, L-ascorbic acid, total phenolic contents, and antioxidant capacities of bamboo shoots (Phyllostachys praecox). Results showed that boiling and stir-frying had a great effect on the ...
Schäfer Martin - - 2011
Recent investigations showed that the model plant Arabidopsis thaliana specifically responds to herbivory-associated molecular patterns by activating a sophisticated signaling network. The lipase activity of insect oral secretions was shown to elevate oxylipin levels when applied to puncture wounds in leaves. The results also demonstrated that the oral secretions of ...
Piotrowska Alicja - - 2011
Phytohormones, including auxins, abscisic acid, brassinosteroids, cytokinins, ethylene, gibberellins, and jasmonates, are involved in all aspects of plant growth, and developmental processes as well as environmental responses. However, our understanding of hormonal homeostasis is far from complete. Phytohormone conjugation is considered as a part of the mechanism to control cellular ...
Orcaray Luis - - 2011
Chlorsulfuron and imazethapyr (herbicides that inhibit acetolactate synthase; ALS, EC 4.1.3.18) produced a strong accumulation of hydroxycinnamic acids that was related to the induction of the first enzyme of the shikimate pathway, 3-deoxy-D-arabino-heptulosonate 7-phosphate synthase (EC 2.5.2.54). The exogenous application of two hydroxycinnamic acids, ferulic and p-coumaric acids, to pea ...
Wu Ting - - 2011
A new triterpenoid glycoside, heterobetulinic acid 3-O-β-D-glucopyranosyl(1 → 2)-β-D-xylopyranoside (1), together with a new phenylacrylic acid derivative, 3'S,4'-dihydroxyl-2'-methylene-but-1'-enyl caffeate (2), were isolated from the roots of Ilex pubescens. Their structures were elucidated by HR-ESI-MS, 1-D and 2-D NMR analyses and chemical methods. In addition, the absolute configuration of 2 was established by ...
Wang Ying - - 2011
Four new flavone C-glycosides, luteolin 6- C- α-L-arabinopyranosyl-7- O- β-D-glucopyranoside ( 1), apigenin 6- C- β-D-galactopyranosiduronic acid (1 → 2)- α-L-arabinopyranoside ( 2), luteolin 6- C- β-D-galactopyranosiduronic acid (1 → 2)- α-L-arabinopyranoside ( 3), and luteolin 6- C- β-D-glucopyranosiduronic acid (1 → 2)- α-L-arabinofuranoside ( 4), along with three known ones, were isolated from the leaves ...
Pardeike Jana - - 2011
Folic acid was used as a model drug to demonstrate the advantages of formulating poorly soluble drugs as nanosuspensions and their use in an inkjet-type printing technique to produce personalized medicines. 10% folic acid nanosuspensions stabilized with Tween 20, a stabilizer showing the best wetting potential for folic acid, were ...
Ternes Philipp - - 2011
• The bioactive lipid ceramide is produced by the enzyme ceramide synthase, which exists in several isoforms in most eukaryotic organisms. Here, we investigated functional differences between the three ceramide synthase isoforms in Arabidopsis thaliana. • The biochemical properties of the three ceramide synthases were investigated by comparing lipid profiles ...
Bi Wentao - - 2011
Polymer-confined ionic liquids were used for the separation of phenolic acids from natural plant extract by utilizing an anion-exchange mechanism. They were synthesized using molecular imprinting technique to reduce non-directional ion-ion interactions during anion-exchange and other interactions with interference substances that could decrease selectivity. A suitable sorbent for phenolic acid ...
Starkenmann Christian - - 2011
The l-cysteine derivatives (R)-2-amino-3-(methyldisulfanyl)propanoic acid (S-methylthio-l-cysteine), (R)-2-amino-3-(propyldisulfanyl)propanoic acid (S-propylthio-l-cysteine), (R)-2-amino-3-(1-propenyldisulfanyl)propanoic acid (S-(1-propenylthio)-l-cysteine), and (R)-2-amino-3-(2-propenyldisulfanyl)propanoic acid (S-allylthio-l-cysteine) were prepared from 3-[(methoxycarbonyl)dithio]-l-alanine, obtained from the reaction of l-cysteine with methoxycarbonylsulfenyl chloride. The occurrence of these S-(+)-alk(en)ylthio-l-cysteine derivatives in onion ( Allium cepa L.) was proven by using UPLC-MS-ESI(+) in SRM mode. Their ...
Yu Juan - - 2011
Two new lupene-type triterpenoids, 3β,6β-dihydroxylup-20(29)-en-28-oic acid β-glucopyranosyl ester (1) and 2α-acetoxyl-3β,6β-dihydroxylup-20(29)-en-28-oic acid β-glucopyranosyl ester (2), along with 18 known compounds, were isolated from Liquidambar formosana. The structures were elucidated on the basis of spectroscopic methods, including UV, IR, ESIMS, 1D- and 2D-NMR experiments, as well as by comparison of the ...
Uddin Ghias - - 2011
The present study was designed to investigate the whole plant of Pistacia integerrima Stewart in order to examine the pharmacological basis of the use of the plant in folk medicine for the treatment of infectious diseases and disorder. Phytochemical and pharmacological studies led to the isolation of a new triterpene ...
Huang Yun-Ting - - 2011
Bioassay-guided fractionation of roots of Beilschmiedia tsangii led to the isolation of six new endiandric acid analogues: tsangibeilin A (1), tsangibeilin B (2), endiandramide A (3), endiandric acid K (4), endiandric acid L (5), and endiandramide B (6). Also isolated were two new lignans, beilschminol A (7) and tsangin C ...
Wong Keng-Chong - - 2011
The aqueous methanolic extracts of Melastoma malabathricum L. exhibited antibacterial activity when assayed against seven microorganisms by the agar diffusion method. Solvent fractionation afforded active chloroform and ethyl acetate fractions from the leaves and the flowers, respectively. A phytochemical study resulted in the identification of ursolic acid (1), 2α-hydroxyursolic acid ...
Qi Wen - - 2011
Two new triterpenoid saponins acylated with monoterpenic acid, 2β,23-dihydroxy-3-O-α-L-rhamnopyranosyl-21-O-{(6S)-2-trans-2,6-dimethyl-6-O-[3-O-(β-D-glucopyranosyl)-4-O-(2-methylbutanoyl)-β-L-arabinopyranosyl]-2,7-octadienoyl)-acacic acid 28-O-β-D-xylopyranosyl-(1 → 3)-β-D-xylopyranosyl-(1 → 4)-[β-D-glucopyranosyl-(1 → 3)]-α-L-rhamnopyranosyl-(1 → 2)-[α-L-rhamnopyranosyl-(1 → 6)]-β-D-glucopyranosyl ester (1) and 2β,23-dihydroxy-3-O-α-L-rhamnopyranosyl-21-O-{(6S)-2-trans-2,6-dimethyl-6-O-[4-O-((6S)-2-trans-2,6-dimethyl-6-O-(β-L-arabinopyranosyl)-2,7-octadienoyl)]-β-L-arabinopyranosyl]-2,7-octadienoyl}-acacic acid 28-O-β-D-xylopyranosyl-(1 → 3)-β-D-xylopyranosyl-(1 → 4)-[β-D-glucopyranosyl-(1 → 3)]-α-L-rhamnopyranosyl-(1 → 2)-[α-L-rhamnopyranosyl-(1 → 6)]-β-D-glucopyranosyl ester (2) were isolated from the fruit of Gymnocladus chinensis Baill. and the structural elucidation of both the compounds was accomplished by extensive studies of their spectroscopic (1D and 2D NMR, TOF-MS, QFT-MS) ...
Oražem Primož - - 2011
Two peach cultivars, 'Redhaven' and 'Royal Glory', grafted on 7 different rootstocks (Adesoto, Barrier 1, GF 677, Ishtara, Monegro, Penta and peach seedling) were analyzed for tree vigor and yield. Fruit of similar ripeness (fruit firmness) was analyzed in terms of pomological (fruit weight, soluble solids content) and biochemical parameters ...
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