An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
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.
... Sweet chestnut has productive and economic potential as long as it grows in favorable ecological areas. Sweet chestnut can be found in Romania as coppices and to a lesser extent in organized orchards. Most of the trees are natural hybrids growing on their own roots while the variability present is quite remarkable. In order to promote chestnut use as a fruit crop, selection work has been taken int ...
... Airborne pollen calendars are useful to estimate the flowering season of the different plants as well as to indicate the allergenic potential present in the atmosphere at a given time. In this study, it is presented a 10-year survey of the atmospheric concentration of allergenic pollen types. Airborne pollen was performed, from 2003 to 2012, using a 7-day Hirst-type volumetric trap. The interannua ...
... The effects of chestnut flour and a xanthan–guar gum blend–DATEM mixture on staling of gluten-free rice breads baked in conventional and infrared–microwave combination ovens were studied. Staling properties of the bread were assessed using mechanical compression (TA), differential scanning calorimetry, X-ray diffraction, and fourier transform infrared spectroscopy (FT-IR). Hardness, moisture loss, ...
... There are strong uncertainties regarding LAI dynamics in forest ecosystems in response to climate change. While empirical growth & yield models (G&YMs) provide good estimations of tree growth at the stand level on a yearly to decennial scale, process-based models (PBMs) use LAI dynamics as a key variable for enabling the accurate prediction of tree growth over short time scales. Bridging the gap b ...
... Seven species of chestnut ( spp.) and most of the possible hybrid combinations of these species are growing in plantings maintained by The Connecticut Agricultural Experiment Station (CAES). In 2011, Asian chestnut gall wasp (Dryocosmus kuriphilus) was found for the first time in these plantings, and had clearly been present for at least two years. Some of the individual trees of the species have ...
... The results of the 3-year-long field monitoring of the content of carbon in the biomass of the virgin and arable chestnut soils of the Tugnui hollow of Transbaikalia are presented. This indicator was evaluated in comparison with similar indicators of other regions. A significant relationship between the change of temperature and carbon quantity in microbian biomass (C-biomass) in the soils was rev ...
Castanea; Dryocosmus kuriphilus; Megastigmus; Torymus; biological control; natural enemies; parasitoids; United States
Abstract:
... The Asian chestnut gall wasp, Dryocosmus kuriphilus (Hymenoptera: Cynipidae), is a globally invasive pest of Castanea. Population regulators and geographic range expansion of the Asian chestnut gall wasp in North America with focus on natural enemy recruitment have been evaluated. After the initial discovery of the gall wasp in the U.S., there were biological control releases that included Megasti ...
... Environmental conditions may significantly affect both the chemical composition and the morphological parameters of chestnuts. The aim of this work was the evaluation of altitude effects on flour chemical composition and on fruit morphological parameters of different chestnut cultivars (Luetta e Leccardina), grown at two different altitude levels (700 and 1000m.a.s.l.). In particular, crude protei ...
Castanea; disease control; germplasm; horticulture; insects; marketing; weed control
Abstract:
... This paper introduces chestnut production methods commonly practiced in Turkey, including germplasm, horticultural care, weed management, fertilization, orchard floor, insect and disease management, harvest, storage and marketing. Recommendations also are provided for improving chestnut production. ...
... The aim of this work was to evaluate the antioxidant activity of yogurt made from milk characterized by different casein (CN) haplotypes (αs1-, β-, κ-CN) and fortified with chestnut and sulla honeys. The CN haplotype was determined by isoelectric focusing, whereas antioxidant activity of yogurt was measured using 2,2’-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid and ferric-reducing antioxidant ...
... The effects of fermentation by 2 food-grade bacteria (Bacillus subtilis and Lactobacillus plantarum) on antioxidant activities and the contents of phenolics and flavonoids in 4 cereals (specifically adlay, chestnut, lotus seed, and walnut) were determined and compared with those of their non-fermented counterparts. Results showed that antioxidant properties observed in the fermented and non-fermen ...
Castanea; Cryphonectria parasitica; biological control; coppicing; forests; fungi; horticulture; human resources; inoculum; orchards; silvicultural practices; tree age; viruses; Greece
Abstract:
... Since 1963 when chestnut blight was recorded for the first time in Greece, the disease has spread into all 29 chestnut growing prefectures. As a result the national, annual chestnut production was reduced from 18,000 tons in the 1960s to 11,000 tons in 2005. A project for the application of biological control on a nationwide scale was funded and implemented during the period 2007-2009. Hypovirulen ...
... This paper assesses the distribution of soil phenolic matter (SPM) in soil environments from a pedological perspective, with particular emphasis on soil horizonation and its involvement in pedogenic processes.The study was conducted on 15 soil profiles (Andosols, Calcisols, Cambisols, Lixisols, Phaeozems, Podzols, Umbrisols) covering five distinct ecosystems. Although the ecosystems were virtually ...
... Normalized biogenic volatile organic compound (BVOC) emission rates for thirty one tree species that cover the 98% of national forested areas in Turkey were determined. Field samplings were performed at fourteen different forested areas in Turkey using a specific dynamic enclosure system. The selected branches of tree species were enclosed in a chamber consisted of a transparent Nalofan bag. The a ...
... It is well known that plants are important sources for the preparation of natural remedies as they contain many biologically active compounds: in particular, bud-preparations deriving from embryonic fresh plant tissues (buds or sprouts) and their bioactive compounds, extracted through the process of cold maceration quoted in the French Pharmacopoeia, show some interesting differences when compared ...
Castanea; antioxidants; bioactive properties; buds; chemical composition; functional foods; genotype; herbal medicines; liquid chromatography; phytochemicals; quality control
Abstract:
... BACKGROUND: Many plant species may be used for the production of herbal preparations containing phytochemicals with significant antioxidant and anti‐inflammatory capacities and health benefits: Castanea spp. is among the most commonly used herbal medicines. The aim of this research was to perform an analytical study of chestnut bud preparations, in order to identify and quantify the main bioactive ...
V. P. Kalinichenko; V. K. Sharshak; S. F. Mironchenko; V. V. Chernenko; E. P. Ladan; E. D. Genev; V. V. Illarionov; A. V. Udalov; V. V. Udalov; E. V. Kippel
... The long-term (30 year) dynamics of a solonetz soil complex composed of solonetzic light chestnut soils and chestnut solonetzes under standard conditions and with the application of agromeliorative measures are considered. When the standard zonal agricultural practice is used, the soils of the solonetzic complex have unfavorable agrophysical, chemical, and physicochemical properties and low produc ...
... The effect of concentration and temperature on viscoelastic properties of chestnut starch is discussed in the paper. The starch structure was estimated using the fractional standard linear solid model FSLSM. Rheological parameters of the FSLSM model were determined and their changes for different concentrations and temperatures of chestnut starch paste were discussed. High values of the viscoelast ...
... Some studies have proven the antioxidant and antimicrobial potency of chestnut flowers both in the raw matrix and after extraction, and the consumption of their decoctions has been related to beneficial effects towards health. In recent years, due to controversy and ambiguous legislation of chemical conservatives, plant extracts have been successfully used as functionalizing agents in different ma ...
... The Dryocosmus kuriphilus susceptibility in almost all chestnut cultivars and the absence of infestation symptoms in the cultivar 'Bouche de Bétizac' led us to investigate in depth plant-pest molecular interaction. For this reason, in 2012, the study of the gall wasp response in chestnut shifted from classical methodologies to an innovative approach potentially able to provide a large amount of in ...
... CIE (Commission Internationale de l’Eclairage) L∗Cab∗hab∘ color coordinates for 305 samples of 17 unifloral honeys types (asphodel, buckwheat, black locust, sweet chestnut, citrus, eucalyptus, Garland thorn, honeydew, heather, lime, mint, rapeseed, sage, strawberry tree, sulla flower, savory and thistle) from different geographic locations in Europe were spectrophotometrically assessed and statist ...
... The potential use of citric acid, ascorbic acid and Na-metabisulphite for the control of browning of peeled ‘Sarıaşlama’ chestnut was investigated. ‘Sarıaşlama’ chestnuts were dipped into solutions of 0, 1, 2 and 4 mM citric acid, ascorbic acid and Na-metabisulphite, placed in trays over-wrapped with plastic film and stored at 4°C for 10 d. Color values and polyphenol oxidase (PPO) activity of the ...
... We investigated the floristic composition, woody species diversity and spatial distribution of trees in a tropical wet evergreen forest in Kaptai national park in Chittagong Hill Tracks, Bangladesh. We recorded 25 families, 37 genera, 40 species and 1771 woody individuals in a 0.09 ha plot. Euphorbiaceae and Moraceae were the most speciesrich families, and Castanopsis, Ficus and Terminalia were th ...
... The structure and specific characteristics of the hydrolytic microbial complexes from chestnut paleosols buried under the barrows of different ages (∼4500 and ∼3500 years) was compared with their modern analogue in microcosm experiments. Potential activity of the hydrolytic complex of the microbial community of the barrow paleosols was found to be higher than in the modern soil complex. The share ...
... Chestnut blight is controlled in Europe by using Cryphonectria hypovirus CHV1, a non-encapsulated RNA virus. The chestnut blight fungus, Cryphonectria parasitica, is weakened by the virus, and healing tissue growth occurs in the host tree. Transmission of this cytoplasmic hypovirus is restricted by the incompatibility system of the fungus, so that the hypovirus can be transmitted only between isol ...
Castanea; foaming; foams; mineral resources; particleboards; resins; synthetic products; tannins; thermal conductivity; water uptake
Abstract:
...
With the depletion of fossil resources, tannin extracts can be a natural alternative to some synthetic products. Hydrolysable chestnut tannin extracts have been used to partially replace phenol in PF resins for phenolic rigid foams. Phenol-formaldehyde-chestnut tannin (PFT) phenolic foams were initially made from copolymerized PFT resins of different molar ratio. The PFT foams so prepared were ...
... To diagnose solonetzic process in virgin and agrogenically transformed soils of solonetzic soil complexes in the chernozemic and chestnut soil zones of European Russia and Western Siberia, their swelling kinetics and physicochemical characteristics were been studied. It was shown that a simultaneous application of these two approaches is more efficient than their separate use. The degree of manife ...
... Inter-storm stable isotopic values of rainfall and throughfall for three flooding events were measured during the period of July to August 2011 to estimate their differences in a first-order chestnut watershed, Meilin, within the Taihu Lake basin. Comparison of δ ²H and δ ¹⁸O was conducted from four aspects: (1) sampling methods, (2) calculation methods, (3) stable isotopes and (4) flood events. A ...
... This study provides a novel qRT‐PCR protocol for specific detection and proof of viability of Phytophthora in environmental samples based on differential accumulation of cox II transcripts. Chemical and physical treatments were tested for their ability to induce in vitro the accumulation of cytochrome oxidase genes encoding subunits II (cox II) transcripts in Phytophthora cambivora. Glucose 170 mM ...
... The effect of the addition of natural antioxidants (tea, chestnut and grape seed extracts) on physico-chemical and oxidative stability of refrigerated stored pig pâtés was studied. This effect was compared with that showed by the synthetic antioxidant BHT. Pâté samples were analysed at 0, 4, 8 and 24weeks of refrigerated storage (4°C).Colour parameters were affected by storage period and antioxida ...
Castanea; alcohols; aldehydes; breeds; diet; discriminant analysis; finishing; flavor compounds; gas chromatography; hydrocarbons; ketones; manufacturing; mass spectrometry; meat; raw meat; salting; sampling; swine; swine feeding; volatile compounds
Abstract:
... The effect of the finishing diet on the volatile compounds throughout the manufacture of dry-cured “lacón” (a Spanish traditional meat product), from the Celta pig breed was studied. Thirty-six pigs were separated into three groups according to the type of feeding during the finish-fattening period of three months (concentrate, mixed diet and chestnut). From the pigs of each diet, four batches of ...
Castanea; Dryocosmus kuriphilus; Torymus; biological control; parasitism; parasitoids; pest control; China; Italy; Japan; United States
Abstract:
... Dryocosmus kuriphilus is a global serious pest of chestnut. Original of China, it was accidentally introduced into several countries across the world. Biological control using its natural parasitoid Torymus sinensis is the most promising method to control the pest. T. sinensis was first introduced into Japan and USA, and since 2005 into Europe. The effectiveness of this biological control strategy ...
... The study is aimed at developing a new cereal-based product, with increased nutritional quality, by using natural fermentation of blends of chestnut and rye flour. In spite of the remarkable similarity, the technological potential of combinations of both flours has never been explored before. Three spontaneous chestnut/rye sourdough fermentations were performed over a period of twelve days with da ...
Abies; Alnus; Carpinus; Castanea; Cupressus; Fagus; Fraxinus; Larix; Picea; Pinus; Populus; Pseudotsuga; Quercus; Robinia; algebra; biomass; conifers; ecosystems; embodied energy; emergy; geothermal energy; humans; life cycle assessment; product life cycle; production technology; wood; working conditions
Abstract:
... Several environmental accounting methods exist to evaluate the rate of ecosystems resource exploitation and to strengthen the comparison among human production systems in terms of renewability and sustainable use of resources. However, their application rarely refers to the environmental work that is necessary to produce natural resources. The aim of this research is to advance the characterizatio ...
... The principal aim of this research was to study coarse-scale habitat selection and distribution of main setts of the Eurasian badger (Meles meles L., 1758). The study area extends for 161 Km² in the hilly territory of southern Lombardy (Italy). The positions of 23 main setts (SP) and 28 random points (RP) were mapped into a GIS. For each point, several environmental characteristics were measured i ...
... Portugal’s forests in the 12th century were dominated by the Fagaceae represented by Quercus and Castanea, and several pine species. From the 12th century onwards, forests underwent changes in their management starting with protection and ultimately leading to intense exploitation. The massive naval construction during the maritime expansion (mainly in the 15th–16th centuries) involved felling of ...
... • Premise of the study: The early Cenozoic was a key period of evolutionary radiation in Fagaceae. The common notion is that species thriving in the modern summer-dry climate of California originated in climates with ample summer rain during the Paleogene.• Methods: We investigated in situ and dispersed pollen of Fagaceae from the uppermost Eocene Florissant fossil beds, Colorado, United States, u ...
... Mixing properties of chestnut flour with typical particle size distribution of wheat flour, incorporated with chia flour (2.5%, 4.0%, 5.0%, 6.0%, 7.5%, flour basis, f.b.), hydroxypropyl methyl cellulose (HPMC) and guar gum (0.5%, 1.0%, 1.5%, 2.0%, f.b.) were determined at 30°C using Mixolab® apparatus. The rheological characterisation at 30°C was achieved by steady shear rate (0.01–10s−1), oscilla ...
... The biological function(s) of the cpkk1, cpkk2 and cpkk3 genes, encoding the three mitogen‐activated protein kinase kinases (MAP2Ks) of Cryphonectria parasitica, the causal agent of chestnut blight, were examined through knockout strains. Cpkk1, the Mkk1 orthologue, acts in a phosphorylation cascade essential for cell integrity; Cpkk2 is the Ste7 orthologue involved in the pheromone response pathw ...
... The family Fagaceae includes several species and presents huge genetic variability. In the last two decades, several genetic studies about phylogenetics and genetic diversity of Fagaceae have emerged. ISSR markers were used to evaluate the genetic diversity of 26 species of Fagaceae belonging to the genera Castanea, Fagus and Quercus. Among several primers tested, 17 were selected for the evaluati ...
... In this contribution we present the results of a Swiss-Italian joint sylvicultural experiment to verify if and how the single-tree-oriented silviculture can be applied to chestnut coppices to enhance timber production for industry and structural timber. The study was carried out in five 7 to 17 years old, pure chestnut coppice stands growing on sites of medium to good fertility in central Italy an ...
... During the period of introduction since the end of the XVIII сentury 80 taxa of Fagaceae have been tested in Saint-Petersburg: 5 – from genus Castanea, 9 – of Fagus and 66 – of Quercus. The modern collection numbers 24 taxa. The winter hardiness, especially the frost damaging after the abnormally cold winters, is considered to be the most serious limiting factor. The involving into cultivation of ...
... Anthracological analysis has been carried out in three sites located on the Tyrrhenian coast of central Italy (ancient northern Etruria: the castle of Donoratico, the town of Populonia and the port of Alberese), spanning between the Roman Republican Period and the Late Middle Ages (3rd century bc–13th century ad). The integrated comparison of three different local charcoal data with the regional p ...
... The addition of salts to foodstuffs to improve the mechanical characteristics and thereby increasing sample strength has been widely studied in gels of model systems, however has been investigated to a lesser extent in complex systems, such as gluten-free flour gels. The objective of this study was to evaluate the impact of cation concentration and ion valence of chloride salts (NaCl, KCl or CaCl2 ...
... In this study four natural extracts from tea (TEA), grape (GRA), chestnut (CHE) and seaweed (SEA) with potential antioxidant activity were evaluated in pork patties. During 20days of storage in modified atmosphere packs at 2°C, pH, colour, lipid oxidation and microbial spoilage parameters of raw minced porcine patties were examined and compared with a synthetic antioxidant (BHT) and control (CON) ...
... Currently, destructive techniques can be employed to evaluate the internal attributes of fresh fruits, vegetables and nuts. However, clearly not all produce can be evaluated. Thus, there is a need to develop an in vivo non-destructive technique able to assess fresh agricultural commodity internal components, especially disorders. In this study, medical grade computed tomography (CT) was used to ob ...
Castanea; chestnuts; industry; manual harvesting; mechanical harvesting; temperature
Abstract:
... For established and emerging chestnut (Castanea spp.) regions, understanding and minimizing the impact of mechanized harvesting on commodity quality is critical. Concerns of physical damage to Castanea spp. nuts, leading to internal disorders during mechanical harvesting, prompted a study to evaluate such effects. Chestnuts were subjected to three harvest methods including a commercial harvester, ...
... Different honey types were collected in Croatia during 2010 and 2011: 7 multifloral orchard honeys, 7 multifloral meadow honeys, 19 black locust, 9 chestnut, 11 lime and 6 sage honeys. Elements were measured using graphite (As, Cu, Cd, Pb, Se) and flame atomic absorption spectrometer (Ca, Fe, K, Mg, Na, Zn) and by mercury analyser (Hg). Significant differences in Ca, Fe, K, Mg, Zn, As and Hg level ...
Natural hydrolysable chestnut tannin extracts used to partially substitute phenol in Phenol-Formaldehyde (PF) resins for phenolic rigid foams were analysed by matrix-assisted desorption ionization time of flight (MALDI-TOF) mass spectrometry. PF only, chestnut only and PF-chestnut copolymerised oligomer types and distribution were determined. MALDI-TOF analyses of a PF control resin (with the s ...
... In this manuscript, we report the isolation and characterization of two secondary metabolites produced by a Gnomoniopsis castanea strain isolated in the Campania region (Italy) from chestnut galls infested with Dryocosmus kuriphilus. The compounds, purified from the fungal culture filtrate by using preparative HPLC-DAD, showed the same spectroscopic data of abscisic acid and 1′,4′-diol of abscisic ...