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.
agricultural education; boiling; developed countries; extension education; farmers; models; professionals; volunteers; Afghanistan; California
Abstract:
... For nearly four decades the University of California, Davis, International Programs Office has worked with global partners to build the agricultural capacity of countries in terms of research, extension, and education. With a focus on extension in lesser developed countries, we have developed an innovative framework for teaching extension professionals how to effectively encourage adoption of much ...
... Since the beginning of the new century, China has implemented numerous state programs for creating public parks and gardens throughout the country. These gardens serve as modern public botanical gardens. Emerging gardens and parks attract citizens not only as a place of recreation – these venues become centers and foundation for implementation of various educational programs for citizens, schoolch ...
... The Mars Desert Research Station is a Mars analog research site located in the desert outside of Hanksville, Utah, U.S.A. Here we present a preliminary checklist of the vascular plant and lichen flora for the station, based on collections made primarily during a two-week simulated Mars mission in November, 2014. Additionally, we present notes on the endolithic chlorophytes and cyanobacteria, and t ...
... Immunoreagents with good results in the competitive enzyme-linked immunosorbent assay are often unable to provide the required detection limit in the traditional competitive immunochromatographic assay. The solution may be either the production of new reagents or improving the test strip. In the latter case, the assay is often performed stepwise using additional liquid reagents, but this is a sign ...
... Several of the biggest challenges in taxonomy and systematics are related to a toxic mixture of small size, abundance, and rarity. There are too many species in groups with too few taxonomists and many of these species are very rare and hard to find because they are hidden in mass samples. To make matters worse, these species often have life‐history stages that are morphologically so different tha ...
cultivars; glycosides; health promotion; nutrient content; onions; quercetin; Italy
Abstract:
... The “Breme” onion is a red-skinned cultivar growing in the northwest Italy. To date, its nutrient composition has not been described. In this study, we quantified the contents of quercetin (Q) and its glycosides and we studied their stability in the dependence on the local home-storage methods storage at 4°C and freezing. Quercetin-3,4'-O-diglycoside (3,4'-Qdg) was the most abundan ...
... From soapstock, which is a waste product of sunflower oil production, the fatty component was isolated using isopropyl alcohol, toluene, fusel oil and a mixture of common salt and nonionic surfactants. With the help of the Langmuir film balance the molecular areas of isolated fats were found and the degree of hydrophobization in comparison with the original soapstock was evaluated. It was found th ...
Bacillus (bacteria); Macadamia; branching; cultivars; drainage; fine roots; flowering; high-throughput nucleotide sequencing; industry; orchards; pathogens; permeability; soil water; trees; viability; New South Wales; Queensland
Abstract:
... 'Abnormal vertical growth' (AVG) was recognised in Australia as a dysfunction of macadamia (Macadamia spp.) in the mid-1990s. Affected trees displayed unusually erect branching, and poor flowering and yield. Since 2002, the commercial significance of AVG, its cause, and strategies to alleviate its affects, has been studied. The cause is still unknown, and AVG remains a serious threat to orchard vi ...
... The interest for raspberry (Rubus idaeus L.) cultivation in Mexico is increasing and there are several regions with potential for raspberry production. We must generate technological knowledge for these places. One of the systems for raspberry production is the multiannual cropping, where defining cane density becomes important in order to enhance plant yield and fruit quality. This research was d ...
... 'Canetova' is a new sweet cherry cultivar released at the Faculty of Agriculture, University of Belgrade. It was selected as a spontaneous seedling and recognized in 2014 by the Serbian Ministry of Agriculture and Environmental Protection. Comparisons with the standard cultivar 'Bigarreau Jaboulay' were done during two consecutive years (2013-2014). It bloomed 3-4 days after the control cultivar. ...
Fusarium; breeding; cassava; cultivars; fruits; industry; leaves; pineapples; titratable acidity; total soluble solids; Brazil
Abstract:
... The Brazilian pineapple industry is based on the cultivar ‘Pérola’, very demanded by consumers due to its organoleptic characteristics, but highly susceptible to fusariosis, caused by Fusarium guttiforme, the main constraint of that crop in Brazil. Since 1984 Embrapa Cassava and Fruits is conducting a pineapple breeding program aiming at developing fusariosis resistant cultivars. In this regard, ‘ ...
... An organized programme of peach breeding in Bulgaria was officially launched in 1989 at the Fruit-Growing Institute in Plovdiv. An important breeding aim is the development of cultivars resistant to economically important diseases such as the peach leaf curl caused by the obligate fungus Taphrina deformans (Fuskel) Tulasne. By interspecific hybridization of the parent cultivars 'Fantasia' × ('J.H. ...
... Malus × domestica 'Honeycrisp' was first planted in Washington State, USA, in 1999. The growth of planted orchard area since then has been exponential and now totals over 5,000 ha. In the first decade of commercial production, the entire crop was shipped from storage within the first three months after harvest due to high consumer demand. Despite rapidly expanding production, market demand still g ...
Cecidomyiidae; Oryza sativa; landraces; leaf blight; leaves; organic production; politics; rice; salt tolerance; sustainable agriculture; India
Abstract:
... As organic agriculture is gaining societal, political and scientific recognition for its contribution to sustainable agriculture, breeding varieties for organic farming with effective resistance to abiotic and biotic stresses and having favourable cooking and nutritive qualities is imperative. Here we report a land race, ‘Kuthiru ’of indica rice (Oryza sativa) having multiple traits of salinity to ...
... 'Lenka' is a new sour cherry cultivar released from the sour cherry breeding program at the Faculty of Agriculture, University of Belgrade. It was selected as a spontaneous seedling and recognized as cultivar in 2014 by the Serbian Ministry of Agriculture and Environmental Protection. The evaluation of this cultivar was done in comparison with the control cultivar 'Meteor Korai' during a two-year ...
Eriobotrya japonica; brix; coasts; color; commercialization; cultivars; fruits; harvest date; loquats; planting; seeds; temperature; total soluble solids; trees; vigor; winter; South Korea
Abstract:
... In Korea, about 82 ha of loquat is cultivated in the south coastal area. However, most local cultivars are small and very sour, which makes consumers choose other fruits. 'Mihwang' is the first loquat to be selected in Korea, released by the fruit research institute of JARES in 2002. The tree vigor of 'Mihwang' is very strong, and the tree shape is widely open. 'Mihwang' is more resistant to low t ...
analysis of variance; biomass; experimental design; irrigation; leaves; pineapples; planting; raw fruit; semiarid zones; vegetative growth
Abstract:
... The aim of this study was to evaluate the vegetative growth and the production of irrigated ‘Pérola’ pineapple. The experimental design was in randomized blocks with four replications and sampling times at 1, 173, 248, 291, 354, 424, 488, 642, 703, 764, 858 days after planting. Evaluations were made of plant height, stem diameter, D-leaf length, fresh and dry matter of leaves, stem, root, fruit, c ...
... Indonesia is one of world's biggest banana producers, however only a small portion of bananas are exported. Mechanical injuries during postharvest handling can increase respiration which leads to ethylene production. Ethylene accelerates fruit ripening process which leads to quality deterioration and waste of fruit. In order to maintain good quality environment condition, distribution process and ...
European Union; Fragaria ananassa; acidity; ascorbic acid; breeding programs; cultivars; firmness; folic acid; markets; patents; ripening; shelf life; soil; strawberries; sugar content; sweetness; taste; United States
Abstract:
... The first two cultivars ('Adria' and 'Sveva') released from the strawberry (Fragaria × ananassa) breeding program of the Marche Polytechnic University (Ancona, IT) show interesting characteristics associated with high adaptability to non-fumigated soil and different cultural conditions. The last two cultivars show other further improvements: 'Romina' - high adaptability to non-fumigated soil, very ...
... Artichoke [Cynara cardunculus var. scolymus (L.) Fiori], one of the most important Italian vegetables, presents the typical problems of a multi-year crop with lack of contemporary production, heterogeneity of the genetic material and often uncertain phytosanitary conditions. The almost exclusive cultivation of traditional local landraces along with the agamic propagation are obstacles to the devel ...
... As part of a breeding programme initiated in 1990 to develop dwarfing stocks for Vitis vinifera, commercial rootstocks under self-or open-pollination led to 400 seedlings, subsequently tested via cuttings for rooting ability and graft compatibility with wine grape 'Cabernet Sauvignon', 'Chardonnay', 'Sangiovese' and table grape 'Muscat de Hambourg'. In a second step, the 'Sangiovese'-grafted cutti ...
... Leafy radish (Raphanus sativus L. var. oleiformis Pers.) is rich in β-carotene, ascorbic acid, α-tocopherol, and quercetin, and is gradually being considered as a new and alternative leafy vegetable. However, current leafy radish cultivars grown in Taiwan are heat intolerant, thus cannot be grown as summer vegetables. Therefore, developing new leafy radish cultivars with heat tolerance is of inter ...
... There is some on-going controversy about the role of phosphites in plant development. Little or no evidence is available that phosphites can be converted to phosphates, and thus directly enhance plant nutrition. Some phosphite-based products have been reported to have 'fungicidal' activity against certain soil-borne oomycetes. However, in the work reported here no direct activity against true fung ...
... (+)- and (−)-Ganodilactone (1), a pair of novel meroterpenoid dimers possessing a unique 5′H-spiro[chroman-4,2′-furan]-2,5′-dione ring system, along with their biogeneticly-related compound, ganomycin I (2), were discovered from the fruiting bodies of Ganoderma leucocontextum. The structures and absolute configurations were assigned with the aid of 1D and 2D NMR spectra, HRESIMS analysis and ECD c ...
... An efficient (+)-camphor-mediated kinetic resolution of racemic cyclohex-2-en-1-ylalane is described. This approach provides an enantiomerically enriched form of the alane, in situ available for synthetic uses. Applied to the allylation of aldehydes, this protocol leads to the corresponding homoallylalcohols in a highly enantioselective manner. ...
antioxidant activity; apoptosis; arsenic; calcium; drinking water; green tea; in vivo studies; medicinal properties; myocardium; oxidative stress; polyphenols; rats; toxicology; ultrastructure
Abstract:
... Chronic arsenic exposure in drinking water is associated with the abnormalities of cardiac tissue. Excessive generation of ROS induced by arsenic has a central role in arsenic-induced cardiotoxicity. (-)-Epigallocatechin-3-gallate (EGCG), the most abundant polyphenol in green tea, possesses a potent antioxidant capacity and exhibits extensive pharmacological activities. This study was aim to evalu ...
... Cellulose synthase-like F6 (CslF6) genes encode polysaccharide synthases responsible for (1,3;1,4)-β-glucan biosynthesis in cereal grains. However, it is not clear how both (1,3)- and (1,4)-linkages are incorporated into a single polysaccharide chain and how the frequency and arrangement of the two linkage types that define the fine structure of the polysaccharide are controlled. Through transient ...
... Micro and mesoporous materials are often used in catalysis, purification, composite filler, and other applications. Almond shell is an important agricultural byproduct that can be transformed to microporous and mesoporous carbon. In this work, we produced biochar from almond shell using a thermal treatment procedure in an inert atmosphere and characterized the pores with nitrogen adsorption, envir ...
aziridines; chemical bonding; chemical reactions; chlorides; cleavage (chemistry); ethylene; ketones; microwave treatment; organic chemistry; phosphorus; pyrroles; triethylamine
Abstract:
... (1H-Tetrazol-5-yl)-allenes have been prepared for the first time, and their reactivity toward aziridines explored. Reaction of a (1-benzyl-1H-tetrazol-5-yl)-phosphonium chloride and acyl chlorides in the presence of triethylamine afforded the target allenes via Wittig reaction of the in situ generated phosphorus ylide and ketenes. 1-(1-Benzyl-1H-tetrazol-5-yl)propa-1,2-diene and 3-methyl-, 3-ethyl ...
... The guava weevil, Conotrachelus psidii is an aggressive pest of guava (Psidium guajava L.) that causes irreparable damages inside the fruit. The volatile compounds of male and female insects were separately collected by headspace solid-phase microextraction or with dynamic headspace collection on a polymer sorbent, and comparatively analyzed by GC–MS. (1R,2S,6R)-2-Hydroxymethyl-2,6-dimethyl-3-oxab ...
Conotrachelus; Theobroma cacao; Theobroma grandiflorum; chemical reactions; chemical structure; headspace analysis; insects; integrated pest management; males; monoterpenoids; pests; pheromones
Abstract:
... The cocoa weevil Conotrachelus humeropictus is an economically most important pest on cocoa (Theobroma cacao) and cupuaçu (Theobroma grandiflorum) cultures. Knowledge on the pheromone system of this insect is prerequisite for the development of an integrated pest management system. GC/MS-analysis of headspace volatiles revealed the presence of three male specific compounds, which were identified t ...
Cerambycidae; antennae; bait traps; enantiomers; females; field experimentation; males; screening; sex attractants; sex pheromones; China
Abstract:
... During field screening trials of a number of known cerambycid pheromones in China, males of Megopis costipennis (White) (Coleoptera: Cerambycidae: Prioninae: Callipogonini) were found to be specifically attracted to racemic anti-2,3-octanediol, suggesting that one of the enantiomers of this compound might be a female-produced sex pheromone of this species. Analysis of volatiles produced by beetles ...
... Robust superhydrophobic and exceptionally thermostable graphene aerogels exhibiting a three-dimensional macro- and mesoporous structure have been synthesized through a (3-mercaptopropyl)trimethoxysilane-assisted two-step route with natural drying. The facile synthetic process not only guarantees their excellent performance but also greatly improves their practical production rate. The prepared gra ...
NAD ADP-ribosyltransferase; Tabernaemontana; alkaloids; apoptosis; cell viability; colon; colorectal neoplasms; cytotoxicity; fibroblasts; flow cytometry; fluorouracil; fractionation; guavas; human cell lines; humans; inhibitory concentration 50; lactate dehydrogenase; liver; medicinal plants; methanol; neoplasm cells; nuclear magnetic resonance spectroscopy; pro-apoptotic proteins; roots; staining; traditional medicine; Africa
Abstract:
... Tabernaemontana elegans Stapf. (Apocynaceae) is a medicinal plant traditionally used in African countries to treat cancer.To discover new apoptosis inducing lead compounds from T. elegans and provide scientific validation of the ethnopharmacological use of this plant.Through fractionation, (3′R)-hydroxytaberanelegantine C (1), a vobasinyl-iboga bisindole alkaloid, was isolated from a cytotoxic alk ...
... Addition of benzyne to carbon nanostructures can proceed via (4 + 2) (1,4-addition) or (2 + 2) (1,2-addition) cycloadditions depending on the species under consideration. In this work, we analyze by means of density functional theory (DFT) calculations the reaction mechanisms for the (4 + 2) and (2 + 2) cycloadditions of benzyne to nanostructures of different curvature, namely, C₆₀ and a series of ...
... We report the identification, synthesis, and first field bioassays of a pheromone component with a novel structure produced by adult males of Chlorida festiva (L.) and Chlorida costata Audinet-Serville, longhorn beetle species in the subfamily Cerambycinae. Headspace volatiles from males contained a sex-specific compound that was identified as (6E,8Z)-6,8-pentadecadienal. Traps baited with this co ...
... (7R, 8S)-9-Acetyl-dehydrodiconiferyl alcohol (ADDA), a novel lignan compound isolated from Clematis armandii Franch (Ranunculaceae) stems, has been found to exert potential anti-inflammatory activities in vitro.To investigate the pharmacological effects and molecular mechanisms of ADDA on lipopolysaccharide (LPS)-induced activation and migration of macrophages.Macrophages were stimulated with LPS ...
... The possibility to functionalize calcium phosphates with bioactive agents is a promising strategy to design innovative biomaterials for bone repair able to couple the bioactive properties of the inorganic compounds with the therapeutic effect of the functionalizing agent. The R enantiomer of the 9-hydroxystearic acid, (9R)-9-HSA, produced from Dimorphotheca sinuata L. seeds, has proven to act as a ...
bacteria; cognition; decision making; eukaryotic cells; genome; genomics; signal transduction
Abstract:
... Bacterial genomes encode numerous and often sophisticated signaling devices to perceive changes in their environment and mount appropriate adaptive responses. With their help, microbes are able to orchestrate specific decision-making processes that alter the cellular behavior, but also integrate and communicate information. Moreover and beyond, some signal transducing systems also enable bacteria ...
chromatography; electric field; electrolytes; fluorescence; magnesium chloride; models; systems analysis; zeta potential
Abstract:
... The present work is an experimental study of a new means to induce a quasi-stationary boundary for concentration or separation in a nanochannel induced by charge inversion. Instead of using pressure-driven counter-flow to keep the front stationary, we exploit charge inversion by a highly charged electrolyte, Ru(bpy)₃Cl₂, that changes the sign of the zeta potential in part of the channel from negat ...
... BACKGROUND: Quercetin‐3‐O‐β‐d‐glucopyranoside (isoquercitrin) and quercetin‐3‐O‐rutinoside (rutin) are common components of a normal human diet and are increasingly used in food supplements. Here their effect on mutagenesis and immunity is shown. RESULTS: The in vitro (anti)mutagenic potential was compared with that of quercetin using the Ames test in Salmonella typhimurium His⁻ strains TA100, TA9 ...
biosensors; convection; diffusivity; nanoparticles; surface area
Abstract:
... There has recently been an extensive amount of work regarding the development of optical, electrical, and mechanical (bio)sensors employing planar arrays of surface-bound nanoparticles. The sensor output for these systems is dependent on the rate at which analyte is transported to, and interacts with, each nanoparticle in the array. There has so far been little discussion on the relationship betwe ...
biodegradability; composting; differential scanning calorimetry; foil; food packaging; food production; food research; gel chromatography; mass spectrometry; nuclear magnetic resonance spectroscopy; polylactic acid; recycling
Abstract:
... The rigid foils obtained from polylactide (PLA) with synthetic poly[(R,S)-3-hydroxybutyrate] ((R,S)-PHB) can be used for production of food packages, which is important enhancement of biodegradable materials application. The biodegradable rigid packaging can be subjected to organic recycling together with food remains. The degradation of PLA and its blend with (R,S)-PHB as rigid foils were studied ...
... Glyphosate and its metabolite aminomethylphosphonic acid (AMPA) are frequently detected in water and sediments. Up to date, there are no comprehensive studies on the fate of glyphosate in water-sediment microcosms according to OECD 308 guideline. Stable isotope co-labeled 13C315N-glyphosate was used to determine the turnover mass balance, formation of metabolites, and formation of residues over a ...
... Hydrogenated graphene is an important graphene derivative with semiconductor properties. A novel and convenient approach via defluorination and hydrogenation of fluorographite, not previously used Birch-type reduction, is developed to prepare highly hydrogenated graphene in ethylenediamine at room temperature via wet-chemical reduction of commercially available fluorographite containing electropos ...
... A simple, facile and highly efficient one-pot synthesis of a pharmaceutically interesting diverse kind of functionalized 2-amino-4H-chromene by a straightforward three-component reaction of an aromatic aldehyde, malononitrile (or ethyl cyanoacetate) and diverse enolizable C–H activated acidic compounds in the presence of a catalytic amount of (CTA)₃[SiW₁₂]–Li⁺–MMT is reported as a novel, environme ...
Gypsophila; corolla; leaves; new species; stems; Iran
Abstract:
... Gypsophila yazdiana Falat., F. Ghahrem. & Assadi (Caryophyllaceae, Caryophylloideae) is described here as a new species from central Iran and is assigned to Gypsophila L. sect. Paniculaeformes F. N. Williams. Despite the overall similarity in habit and shape of the leaves and inflorescence, it differs from the related species G. perfoliata L. by having the stems glabrous, the leaves glabrous and n ...
... In order to understand the taxonomy of the enigmatic Tradescantia cymbispatha — the source of the confusion between T. sect. Austrotradescantia and T. sect. Cymbispatha — we reexamined the protologues of T. geniculata Vell., T. mundula var. scabrida, T. cymbispatha, T. cymbispatha var. villosissima, T. cerinthoides, T. koernickeana, and T. umbraculifera. Our analysis revealed a great deal of confu ...
... Third millennium B.C. anthropomorphic marble sculpture from the Aegean Cyclades, the so-called Early Cycladic figures and figurines, have fascinated art aficionados and scholars alike for over a century. This has led to a tremendous amount of aesthetic appreciation and monetary value for the aforementioned artifacts. However, a distorted and more important dissociated and decontextualized view of ...
absorption; additives; annealing; chemical interactions; photovoltaic cells; polymers; thiophene; transistors
Abstract:
... In order to investigate the effect of an (E)-1,2-di(thiophen-2-yl)ethene (TVT) unit on the hole mobility and photovoltaic properties of dithienyl-difluorobenzothiadiazole (DTBT) based polymers, two conjugated polymers PDT-DTBT-DT (thiophene backboned) and PTVT-DTBT-DT (TVT backboned) were synthesized. Compared to PDT-DTBT-DT, the backbone conformation of PTVT-DTBT-DT could be well modulated by the ...