The volatile composition of fruit from four Citrus varieties (Powell Navel orange, Clemenules mandarine, and Fortune mandarine Chandler pummelo) covering different species has been studied. Over one hundred compounds were profiled after HS-SPME-GC-MS analysis, including 27 esters, 23 aldehydes, 21 alcohols, 13 monoterpene hydrocarbons, 10 ketones, 5 sesquiterpene 4 cyclic ethers, furans, 2 aromatic which all confirmed with standards. differences in the profile among juices these essentially...

Volatile constituents of ripe fruits 16 Capsicum accessions from the annuum−chinense−frutescens complex, with different aroma impressions and geographical origins, were isolated by headspace-solid phase microextraction (HS-SPME) analyzed gas chromatography−olfactometry−mass spectrometry (GC-sniffing port-MS). More than 300 individual compounds could be detected in studied genotypes; most them identified comparing mass spectra retention times authentic reference substances or literature data....

The presence of fruit has been widely reported to act as an inhibitor flowering in trees. This study is investigation into the effect load on 'Moncada' mandarin and expression putative orthologues genes involved pathways provide insight molecular mechanisms underlying alternate bearing citrus.

Aroma profile and carotenoids content of melon flesh are two important aspects influencing the quality this fruit that have been characterized using only selected genotypes. However, extant variability whole species remains unknown.A complete view volatile/carotenoid profiles was obtained analyzing 71 accessions, representing diversity species. Gas chromatography-mass spectrometry high-performance liquid chromatography were used to analyze 200 volatile compounds five carotenoids. Genotypes...

Two new meroterpenoids, terretonins E and F (1, 2), together with three known compounds, aurantiamine (3), linoleic acid, uridine, were isolated as fermentation products of the marine-derived fungus Aspergillus insuetus, which was associated sponge Petrosia ficiformis. Structures all isolates elucidated employing spectroscopic methods, mainly by two-dimensional NMR techniques. Compounds 1−3 showed activity inhibitors mammalian mitochondrial respiratory chain.

Citrus crops in the Mediterranean region are often grown high pH calcareous soils, which promote nutrient imbalances, especially iron deficiency. ‘Navelina’ trees grafted on eight different citrus rootstocks were assessed terms of their relative tolerance to these soils. To do so, leaf gas exchange and chlorophyll a fluorescence parameters measured for 2 consecutive years leaves without visible injury symptoms. Trees Carrizo citrange, hybrids Cleopatra mandarin × Poncirus trifoliata no. 5...

Abstract: The carotenoid patterns of fully ripe fruits from 12 Bolivian accessions the Andean peppers Capsicum baccatum (ají) and C. pubescens (rocoto) were determined by high‐performance liquid chromatography (HPLC)‐photodiode array detector (PDA)‐mass spectrometry (MS). We include 2 California Wonder cultivars as annuum controls. A total 16 carotenoids identified differences among species mostly found at quantitative level. Among red‐fruited genotypes, capsanthin was main in 3 (25% to 50%...

Gene determination of flowering is the result complex interactions involving both promoters and inhibitors. In this study, expression flowering-related genes at meristem level in alternate-bearing citrus trees analysed, together with interplay between buds leaves flowering.

Drought stress is becoming the most important factor of global warming in forests, hampering production reproductive material with improved resilience. Previously, we reported that heat-priming maritime pine (Pinus pinaster) megagametophytes during SE produced epigenetic changes generated plants better adapted to subsequent heat stress. In this work, tested, an experiment performed under greenhouse conditions, whether will produce cross-tolerance mild drought (30 days) 3-year-old...

Penitrem G (7), a new indole-diterpenoid compound, has been isolated together with the already known mycotoxins penitrems A-D (1-4) and F (6) from mycelium of Penicillium crustosum Thom. The structure penitrem was established on basis spectroscopic data. In addition, paspaline (8), another mycotoxin that not previously described in this fungus, also isolated. These compounds were tested for insecticidal activity against hemipteran Oncopeltus fasciatus Dallas dipteran Ceratitis capitata...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCerasodine and Cerasonine: New Oxoprotoberberine Alkaloids from Polyalthia cerasoidesM. Carmen González, Zafra-Polo, M. Amparo Blázquez, Angel Serrano, Diego CortesView Author Information Departamento de Farmacología, Farmacognosia y Farmacodinamia, Facultad Farmacia, Universidad Valencia, 46100 Burjassot, Spain Cite this: J. Nat. Prod. 1997, 60, 2, 108–110Publication Date (Web):February 21, 1997Publication History Received12 August 1996Published...

Abstract Artemisia judaica L. essential oil was studied for antibacterial activity against various clinical isolates of bacteria resistant to a number antibiotics. The evaluated 20 multidrug (MDR) origin compared standard ATCC strains. strains that showed resistance the maximum antibiotics tested were selected an assay by three methods: Disc diffusion method, microatmosphere and dilution method. obtained results demonstrated A. possessed excellent inhibitory effect all most potent MRSA...

Paraherquamide H (1) and paraherquamide I (2), two new compounds of the (PHQ) family, together with already known A (3), B (4), E (5), VM55596 (N-oxide paraherquamide) (6), VM55597 (7), five diketopiperazines (8−12) have been isolated from culture broth Penicillium cluniae Quintanilla. The structure 1 2, on basis NMR MS analysis, was established. It is worth noticing that, in both cases, an unusual oxidative substitution C-16 found, which had only previously detected PHQ 7. Isolated were...

Summary The control of the raw material has a great influence on final quality wine. Nowadays, wineries have practically not incorporated an effective grape juice their production process. Although wine aroma been widely analysed, for wine‐making poorly studied. In this study, two headspace‐based technique methodologies proposed to characterise juice: static headspace (SHS) and solid phase microextraction (HS‐SPME). Both techniques were applied samples from three maturation stages red...