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geographical distribution; soil water storage; plant available water; water conservation; terracing; soil water content; subsoil; drought; water stress; infiltration (hydrology); crop yield; rain; rain intensity; food security; soil fertility; field experimentation; terraces; water erosion; Mali
mathematical models; quantitative analysis; General Circulation Models; isotopes; evaporation; rain; temperature; water vapor; Japan
Abstract:
... A numerical model is proposed that describes the interaction between raindrops and water vapour near the planetary boundary layer to explain the "amount effect". This model relates the intensity to the isotopic composition of precipitation. The model resolves raindrop sizes, and explicitly includes: (1) the isotopic equilibration time of raindrops that is drop-size dependent; (2) raindrop transit ...
Cucumis melo; branching; breeding lines; cucumbers; fruit set; fruits; germplasm; harvesting; hermaphroditism; hybrids; introgression; labor; muskmelons; parents; phenotype; pickling; space and time; vegetable crops; Iran
Abstract:
... Melons (Cucumis melo) are an important vegetable crop. Melons are grown mostly for their sweet mature fruits, which are eaten fresh, but elongate-fruited forms are grown for their rather bland, juicy, immature fruits, which are eaten fresh, cooked, or pickled like cucumbers. Fruit set of melons is diffuse over time and space, resulting in the need for multiple harvesting of the crop. The "b ...
alkynes; catalysts; copper; crosslinking; gelation; hydrocolloids; polymers; temperature
Abstract:
... The strategy for in situ chemical gelation of poly(N-isopropylacrylamide-co-hydroxylethyl methacrylate) [P(NIPAAm-co-HEMA)]-based polymers was demonstrated. Two types of new P(NIPAAm-co-HEMA) derivatives with alkyne and azide pendant groups, respectively, were prepared. When the solutions of the two derivatives were mixed together, a crosslinking reaction, a type of Huisgen's 1,3-dipolar azide-alk ...
... A rapid and highly sensitive CE immunoassay method integrating mixing, reaction, separation, and detection on-chip is described for the measurement of α-fetoprotein (AFP), a liver cancer marker in blood. Antibody-binding reagents, consisting of 245-bp DNA coupled anti-AFP WA1 antibody (DNA-WA1) and HiLyte dye-labeled anti-AFP WA2 antibody (HiLyte-WA2), and AFP-containing sample were filled into ad ...
... The discipline of glycobiology contributes to our understanding of human health and disease through research, most of which is published in peer-reviewed scientific journals. Recently, legitimate discoveries in glycobiology have been used as marketing tools to help sell plant extracts termed "glyconutrients." The glyconutrient industry has a worldwide sales force of over half a million people and ...
Drosophila; axonal transport; cell culture; mammals; mitogen-activated protein kinase; proteins
Abstract:
... JIPs are JNK interacting proteins and bind to JNK cascade kinases. JIP1 and JIP3 were known to be adaptors linking cargo to Kinesin-I, a major molecular motor for axonal transport. Recent research sheds further light on JIPs' complex roles in axonal transport, namely in activation of Kinesin-I and in cargo release. In Drosophila, APLIP1/JIP1 allows the Kinesin-I complex to enable cargo release thr ...
laws and regulations; water pollution; water quality; wastewater treatment; water; drinking water; hydrologic cycle; United States
Abstract:
... The Institute of Food Technologists has issued this Scientific Status Summary to provide readers with an overview of drinking water standards and regulations, freshwater resources, water pollution and predominant sources of contamination, and the effects of agriculture and food processing on water quality and wastewater treatment. ...
college students; higher education; curriculum; cognition; Minnesota
Abstract:
... This article gives a perspective on the use of memoir writing as pedagogy in three undergraduate courses at the University of Minnesota in 2002, 2005, and 2006. Each of these courses explored the significance of "place" and "time" in the lives of the students. In each, the students wrote memoirs ranging from about 1500 to 5000 words in length. Selected quotations from student evaluative reflection ...
ethers; ions; nuclear magnetic resonance spectroscopy; polymers; titration
Abstract:
... Well-defined macromolecules have been obtained through free-radical cyclopolymerization and cyclocopolymerization of difunctional and acrylic-like monomers, which contained "push-pull" supramolecular chromophores, able to form 1:1 complexes with Eu³⁺ ions in solution. The monomeric molecular modules are built around bismalonate crown ethers in a convergent fashion, in which one of the malonate moi ...
exercise; obesity; people; public health; qualitative analysis; social change; social networks; weight loss
Abstract:
... BACKGROUND: To explore the extent to which people living with obesity have attempted to lose weight, their attitudes towards dieting, physical exercise and weight loss solutions, why their weight loss attempts have failed, and their opinions about what would be most beneficial to them in their struggle with their weight. METHOD: Qualitative study, using open-ended interviews, of 76 people living w ...
... This critical review describes the confused application of significance tests in environmental toxicology and chemistry that often produces incorrect inferences and indefensible regulatory decisions. Following a brief review of statistical testing theory, nine recommendations are put forward. The first is that confidence intervals be used instead of hypothesis tests whenever possible. The remainin ...
acoustics; algorithms; brain; cortex; humans; magnetic resonance imaging; speech
Abstract:
... Can we decipher speech content ("what" is being said) and speaker identity ("who" is saying it) from observations of brain activity of a listener? Here, we combine functional magnetic resonance imaging with a data-mining algorithm and retrieve what and whom a person is listening to from the neural fingerprints that speech and voice signals elicit in the listener's auditory cortex. These cortical f ...
... Amphiphilic block copolymers can be conveniently prepared via convergent syntheses, allowing each individual polymer block to be prepared via the polymerization technique that gives the best architectural control. The convergent "click-chemistry" route presented here, gives access to amphiphilic diblock copolymers prepared from a ring opening metathesis polymer and polyethylene glycol. Because of ...
catalysts; ethylene; polymerization; polymers; silica; temperature
Abstract:
... Homogeneous and silica-supported Cp₂ZrCl₂/methylaluminoxane (MAO) catalyst systems have been used for the copolymerization of ethylene with 1-butene, 1-hexene, 4-methylpentene-1 (4-MP-1), and 1-octene in order to compare the "comonomer effect" obtained with a homogeneous metallocene-based catalyst system with that obtained using a heterogenized form of the same metallocene-based catalyst system. T ...
... This article describes a DNA-like polymer that exhibits the ability to self-assemble through hydrogen bonding. We synthesized poly[1-(4-vinylbenzyl)thymine] (PVBT) and 9-hexadecyladenine (A-C16) through an atom transfer radical polymerization (ATRP) and alkylation, respectively. Biocomplementary PVBT/A-C16 hierarchical supramolecular complexes formed in dilute DMSO solution through nucleobase reco ...
... In the genomics era, bioinformatic analysis, especially in non-model species, facilitates the identification and naming of numerous new proteins, the function of which is then inferred through homology searches. Here, we question certain aspects of these approaches. What are the criteria that permit such a determination? What are their limits? Naming is classifying. We review the different criteri ...
analysis of variance; beef; beef carcasses; curing (food products); muscles; salt content; salting; sensory evaluation; sensory properties
Abstract:
... The aim of this study was to determine salt penetration dynamics during the muscle-salting process with and without vacuum tumbling, as well as to investigate the influence of these two different salting treatments on sensory properties of "Uzice Beef Prshuta," a traditional Serbian dry-cured meat product. Twenty-four samples of two different muscles obtained from beef carcasses were analyzed: 12 ...
... Cryptic speciation is repeatedly reported in sponge taxonomic studies. Most of the cryptic species, which were revealed by molecular markers, have never been formally described owing to the difficulty in finding diagnostic phenotypic characters. A previous molecular study revealed four genetically distinct species that had been misidentified as Scopalina lophyropoda Schmidt. One species was S. lop ...
acid value; acidity; ambient temperature; analysis of variance; climate; honey; pH; quality control
Abstract:
... Stability of food is of particular interest, as we should know the period for which a given food maintains its original quality. Acidity is a very important parameter as regards honey quality control. In this study we analysed a possible 'best before period once opened', regarding the evolution of acidity in honey throughout 30 months in samples from regions with oceanic climates. The study was ca ...
traditional medicine; Agathosma betulina; wild plants; essential oils; medicinal plants; medicinal properties; plant physiology; pharmacokinetics; herbal medicines; South Africa
Abstract:
... South Africa has offered the world two indigenous aromatic plants from which commercially important natural products have been developed: Pelargonium graveolens (and its hybrids) the source of geranium oil and Agathosma betulina, from which 'Buchu' oil is produced. Despite the historical use of 'Buchu' and the commercial interest developed around this coveted indigenous resource the (limited) rese ...
food webs; soil bacteria; soil nematodes; flagellum; Protozoa; species diversity; population density; ecological competition; Caenorhabditis elegans
Abstract:
... Nematodes and flagellates are important bacterial predators in soil and sediments. Generally, these organisms are considered to be competitors for bacterial food. We studied the interaction among flagellates and nematodes using axenic liquid cultures amended with heat-killed bacteria as food and showed for the first time that a small and common soil flagellate (Cercomonas sp.) is able to attack an ...
ecological function; soil fungi; community structure; tundra soils; cold soils; climate change; carbon; species diversity; microbial detection; biodegradation; Basidiomycota; Antarctic region; Arctic region
Abstract:
... Current knowledge concerning 'decomposer' Basidiomycota in Arctic and Antarctic ecosystems is based on two sources: (a) collections and surveys of basidiomata, which have resulted in high-quality catalogues of species, although much of the species' distribution and ecology are tentative and (b) isolations from soils and plant litter which typically result in a “low incidence of basidiomycetes” [Do ...
geochemistry; hazardous waste; hosts; mass transfer; model validation; permeability; politics; radionuclides; sorption; waste disposal; Belgium; France; Switzerland
Abstract:
... Disposal of high level radioactive waste in deep underground repositories has been chosen as solution by several countries. Because of the special status this type waste has in the public mind, national implementation programs typically mobilize massive R&D efforts, last decades and are subject to extremely detailed and critical social-political scrutiny. The culminating argument of each program i ...
... Some models of sexual selection predict that individuals vary in their genetic quality and reveal some of this variation in their secondary sexual characteristics. Alpine whitefish (Coregonus sp.) develop breeding tubercles shortly before their spawning season. These tubercles are epidermal structures that are distributed regularly along the body sides of both males and females. There is still muc ...
funding; direct marketing; job training; human resources management; business management; farmers' markets; business planning; Oregon
Abstract:
... This paper explores hidden problems amid the impressive expansion of farmers' markets in Oregon and throughout the United States. Although markets are growing in number, a surprisingly large number of them fail. A challenge for many markets is inadequate revenue to support market operations such as paying for the management personnel to perform functions necessary to grow and sustain markets. Smal ...
... Deep misunderstandings still besiege taxonomy after more than 200 years of fruitful output. It has been asserted in this journal that taxonomy should be integrative and conform to a series of restrictive guidelines. We show that taxonomy has been integrative for most of its history although, in our sense, integrative does not mean the indiscriminate pooling of any source of data. The guidelines pr ...
activists; citizen participation; international cooperation; interpersonal relationships; nongovernmental organizations; peasantry; politics; rural sociology; social environment; social networks; Brazil; South Africa
Abstract:
... In this paper, we analyze the political dynamics of the contemporary 'transnational peasant network' through a comparison of two movements: the Brazilian Movimento Dos Trabalhadores Rurais Sem Terra (MST) and the South African Landless People's Movement (LPM). We argue that transnational visions of 'peasants' often obscure relations between or within rural movements. One tangible benefit of the tr ...
... Reconstructing the temporal and spatial climate development on a seasonal basis during the last few centuries, including the 'Little Ice Age', may help us better understand modern-day interplay between natural and anthropogenic climate variability. The conventional view of the climate development during the last millennium has been that it followed a sequence of a Medieval Warm Period, a cool 'Lit ...
... The uniform and precise application of microbial particles close to the target organism and to the plant to be protected can increase the success of a biological control treatment. The use of systems or technologies which are usually available in agriculture could influence the acceptability of biocontrol agents by farmers, and enlarge the market. A pilot system was realized using dripper lines, d ...
... The Brazilian Movimento dos Trabalhadores Rurais Sem-Terra (MST) is one of the best-known and most prominent rural social movements. The unequal distribution of land in Brazil, and the neglect of this problem by successive Brazilian governments contributed greatly to the organisation of rural movements striving for the implementation of land reform in the country. The struggle for land therefore f ...
... Massive degradation of photosynthetic proteins is the hallmark of leaf senescence; however the mechanism involved in chloroplast protein breakdown is not completely understood. As small 'senescence-associated vacuoles' (SAVs) with intense proteolytic activity accumulate in senescing leaves of soybean and Arabidopsis, the main goal of this work was to determine whether SAVs are involved in the degr ...
... In the 'mating pool' mode of reproduction, offspring genotypes at each generation are taken randomly from a common population and subdivided into groups where individuals representing a finite sample from the pooled distribution reproduce proportional to their fitness. Assuming that genetically diverse groups contribute more offspring, a recent article by Nonacs & Kapheim [J. Evol. Biol. 20 (2007) ...
... This study uses a range of published and unpublished historical documentary sources to explore the nature of rainfall variability in the Kalahari Desert and adjacent hardveld regions of central southern Africa during the seventeen Pacific El Niño-Southern Oscillation (ENSO) episodes that occurred between 1840 and 1900. Documentary data are used in two ways. First, maps of relative annual rainfall ...
consumer attitudes; family-owned businesses; rural communities; social cohesion; Ireland; United Kingdom
Abstract:
... While family-owned businesses are considered to have specific advantages in customer relationships, limited research has been conducted into how these abilities are developed or understood by the public. Consumers may indeed perceive family businesses differently from non-family businesses, but this aspect has received scant attention within the literature. This paper sets out exploratory work des ...
... The effects of VI-28 (a Yang-invigorating Chinese herbal formula) treatment on the renal mitochondrial antioxidant system and susceptibility to gentamicin-induced nephrotoxicity were investigated in rats. VI-28 treatment (80 or 240 mg/kg/day x 12) enhanced the renal mitochondrial antioxidant system, as indicated by dose-dependent increases in the level/activities of reduced glutathione, Mn-superox ...
arid zones; primary productivity; rural policy; cultural differences; population distribution; indigenous knowledge; deserts; cultural environment; market access; population density; human population; rural areas; social environment; climatic factors; rural sociology; indigenous peoples; Australia
Abstract:
... The desert knowledge community has been motivated by the assertion that outback Australia is characterised by a set of features that are not individually unique, but which together cause it to function in ways that are fundamentally different to other physical and social environments. This paper sets out to appraise this assertion. It documents the evidence for the individual features - (i) climat ...
Bufo; European Union; biodiversity; carrying capacity; habitats; land use; local government; nongovernmental organizations; pioneer species; planning; public lands; toads; vegetation; Belgium
Abstract:
... Biodiversity conservation in economic areas like ports has recently become more important in the European Union due to a stricter interpretation of nature protection laws. In this study we develop a planning and design strategy--the 'habitat backbone'--with which to support the long-term survival of pioneer species that occur in ports and have low dispersal abilities. For those species, long-term ...
... Aflatoxins are highly carcinogenic secondary metabolites produced primarily by the fungi Aspergillus flavus and Aspergillus parasiticus. Aflatoxin contamination of food and feed is an age old problem of particular concern over the last four decades. Now, for the first time control measures for this problem appear within reach. For practical and sustainable control of aflatoxin contamination to be ...
... To obtain palaeobotanical evidence enabling evaluation of the viability of the hypothesis that the 'oriental' element of the Balkan flora reached south-east Europe from Turkey prior to the Holocene, probably via the Thracian Plain during a late Quaternary glacial stage but no later than the late Weichselian. Ezero wetland, northern Thracian Plain, Bulgaria. We undertook analyses of pollen and micr ...
biomass; climatic factors; ecosystems; fish; fisheries; genetic techniques and protocols; islands; mortality; traditional technology
Abstract:
... In this paper we demonstrate that low level 'artisanal' fishing can dramatically affect populations of slow-growing, late-maturing animals and that even on remote oceanic islands, stocks have been depleted and ecosystems degraded for millennia. Industrialised fisheries have developed during different decades in different regions of the world, and this has almost always been followed by a period of ...
rural economics; rural development; rural communities; indigenous peoples; human settlements; pastoralism; issues and policy; deserts; Australia
Abstract:
... There is a continuing policy debate about whether it is possible to have sustainable small settlements in outback regions of Australia, where there is low and variable primary production and a sparse and mobile population. This debate is focused largely on Aboriginal settlements, but applies equally to all desert dwellers. In this contribution, we review the sources of economic flows through settl ...
... Commercial concentrated Concord (CCJ) and Isabel (CIJ) grapes juices were stored at 4-5 °C while pasteurised ready-to-drink juices of the same grape cultivars (PCJ and PIJ) were kept at 20-25 °C under indirect light for 10 months, simulating industrial storage conditions. (+)-catechin preservation during storage ranged between 63% (PCJ) and 52% (PIJ); (-)-epicatechin retention was of 32% (CCJ) and ...
phosphatidylinositol 3-kinase; protein kinases; stilbenes; humans; phytochemicals; Influenza A virus; epithelial cells; signal transduction; Vitis; cultured cells; protein phosphorylation; chemokines
X-ray diffraction; additives; atomic force microscopy; cobalt; copper; crystallites; iron; nickel; pyrolysis; scanning electron microscopy; temperature; texture; tin
Abstract:
... The results of structural characterization of SnO₂ films doped by impurities such as Fe, Cu, Ni, and Co during spray pyrolysis deposition from 0.2 M SnCl₄–water solutions are presented. The change of parameters such as film morphology, the grain size, texture, and the intensity of X-ray diffraction peaks were controlled. For structural analysis of tested films, we used X-ray Diffraction, Scanning ...
... The behavioral and electroantennographic responses of Prorhinotermes canalifrons to its soldier frontal gland secretion, and two separated major components of the secretion, (E)-1-nitropentadec-1-ene and (E,E)-α-farnesene, were studied in laboratory experiments. Behavioral experiments showed that both the frontal gland secretion and (E,E)-α-farnesene triggered alarm reactions in P. canalifrons, wh ...
Anoplophora glabripennis; Monochamus alternatus; Quercus; adults; cages; chemical substances; frass; gas chromatography; hosts; larvae; mass spectrometry; natural enemies; odors; parasitism; trees; wood
Abstract:
... 1 Chemical cues involved in host location by Dastarcus helophoroides (Fairmaire) (Coleoptera: Bothrideridae), a parasitoid of Anoplophora glabripennis Motschulsky, Monochamus alternatus Hope, Massicus raddei (Blessig), Apriona germari (Hope), Apriona swainsoni (Hope) and Batocera horsfielde (Hope) in the family Cerambycidae, were investigated in a Y-tube olfactometer. Responses of D. helophoroides ...
empirical research; governance; human development; Sub-Saharan Africa
Abstract:
... Post-conflict governance is an increasingly important aspect of foreign development assistance in sub-Saharan Africa (SSA), where the weakening and disintegration of the state undermine sustainable human development. A major challenge in post-conflict rebuilding in SSA concerns the incorporation of subnational non-state structures and informal institutions into the post-conflict governance apparat ...
Sesbania bispinosa; seed oils; fatty acid composition; chemical structure; industrial oils; fatty acids; spectral analysis; chemical constituents of plants
Abstract:
... On the basis of various industrial importances of hydroxyl fatty acids we have investigated Sesbania aculeata seed oil. The most interesting finding is the presence of a hydroxyolefinic fatty acid (9.24%) along with other usual fatty acids such as lauric (2.51%), myristic (0.37%), palmitic (10.94%), palmitoleic (3.54%), stearic (4.02%), oleic (17.10%), linoleic (45.92%), linolenic (5.29%), arachid ...
elderly; emotions; brain; lipid metabolism; central nervous system diseases; elderly nutrition; polyunsaturated fatty acids; omega-3 fatty acids; omega-6 fatty acids
Abstract:
... Over the last decade, the role of dietary PUFA in growth, development, and cognitive function in the infant has been a topic at numerous national and international meetings. Only recently has the role of PUFA been more seriously examined as they relate to the aging brain. In fact, a search of the literature reveals very few randomized control trials exploring this research area. However, the liter ...
... cis-Vaccenic acid or cis-11-octadecenoic acid, a C18:1 (n-7) isomer of oleic acid (C18:1 (n-9)) has been found in several oilseeds. It is synthesized from palmitic acid (C16:0) via production of C16:1 (n-7) by a Δ9 desaturase and elongation by an elongase giving C18:1 (n-7). In this study, the fatty acid composition of 12 Brassica species was analyzed by GC-FID and confirmed by GC-MS. All species ...
... The versatile new ligand precursor 1/3-PⁱPr₂-2-SᵗBu-indene has been employed in the preparation of neutral and cationic (κ²-P,S)Pt(benzyl) complexes, as well as structurally related zwitterions in which the formally cationic metal fragment is counterbalanced by an uncoordinated indenide or borate fragment that is contained within the ancillary ligand backbone. ...
... (−)-Epigallocatechin-3-gallate (EGCG)-induced apoptosis was along both the extracellular signal-regulated protein kinase (ERK) and c-jun N-terminal kinase (JNK) pathways in Jurkat cells. Co-treatment with EGCG potentiated the cytotoxicity induced by benzyl isothiocyanate (BITC) and H₂O₂, both being inhibited by ERK and JNK inhibitors. These results suggest the significant role of mitogen-activated ...
... A new Lactococcus lactis subsp. lactis B84, capable of utilizing starch as a sole carbon source and producing l(+)-lactate, was isolated from spontaneously fermented rye sourdough. Aiming at maximum lactic acid productivity, the components of the media and the cultivation conditions were varied. In MRS-starch medium (with absence of yeast and meat extracts), at 33 °C, agitation 200 rpm and pH 6.0 ...
... The genus Mesotrichosiphum Calilung, an endemic southeastern Asian group, is reviewed to include Mesotrichosiphum pentaiarticulatum Zhang and Qiao, sp. nov. from China (Hainan). The generic diagnosis is supplemented in here, and a key is given to all species worldwide. Some hitherto unknown morphs of Mesotrichosiphum are described. New data on distributions and host plants are reported for the gen ...
X-ray diffraction; anions; chemical reactions; ligands; phosphorus
Abstract:
... The electronic structure of the 1,2,3-triphosphaindenyl ligand suggests that it should exhibit enhanced π-acceptor properties when compared to the η⁵-indenyl system; this insight encouraged us to develop a simple synthetic pathway from 1,2-diphosphinobenzene to the 1,2,3-C₆H₄P₃ and 2-As-1,3-C₆H₄P₂ anions, both of which have been structurally characterised by X-ray crystallography; as a bonus from ...
... The copper catalyzed 1,3-dipolar cycloaddition of 4-butoxyphenylazide with 2-, 3- or 4-ethynylpyridine furnishes 1,4-diaryltriazoles, which display turn-on fluorescence upon addition of metal cations. ...
cytotoxins; Dendrobium; human cell lines; leukemia; anticarcinogenic activity; medicinal plants; phytochemicals; lung neoplasms; liver neoplasms; stomach neoplasms; in vitro studies
Abstract:
... A new compound, 1,4,5-trihydroxy-7-methoxy-9H-fluoren-9-one, has been isolated together with two known fluorenones, dendroflorin and denchrysan A, from the whole plant of Dendrobium chrysotoxum, a plant of Dendrobium genus, used as a health-food. The structure of the fluorenones has been determined on the basis of spectroscopic studies. The isolated compounds were evaluated in vitro for their inhi ...
... This tutorial review describes that high levels of substrate-controlled, 1,5-stereoinduction are obtained in the boron-mediated aldol reactions of β-oxygenated methyl ketones with achiral and chiral aldehydes. Remote induction from the boron enolates gives the 1,5-anti adducts, with the enolate π-facial selectivity critically dependent upon the nature of the β-alkoxy protecting group. This 1,5-ant ...
... General procedures of N-chloroacetylation of the representative 1-aminoalkylphosphonic acids (GlyP, AlaP, ValP, PglyP and PheP) are described. These 1-(N-chloroacetylamino)-alkylphosphonic acids were converted into the corresponding glycylphosphonodipeptides (Gly-AAP) and/or related N-alkylglycylphosphonodipeptides (MenGly-AAP) in the course of ammonolysis/aminolysis. Physico-chemical properties o ...
Musa paradisiaca; ethylene; plantains (fruit); peas; Pisum sativum
Abstract:
... Ethylene, propene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, and 1-dodecene were tested as ethylene action compounds and also as ethylene competitive inhibitors using a pea growth and a banana ripening assay method. Ethylene, propene, and 1-butene gave a growth inhibition ethylene response in etiolated pea seedlings. 1-Pentene, 1-hexane, 1-octene, 1-decene, and 1-dodecene were inactive as ...
chemical communication; cycloaddition reactions; heterocyclic nitrogen compounds
Abstract:
... 1-Azadienes are versatile building blocks for the efficient construction of various N-heterocycles. Depending on the substitution pattern and reaction partner, they may participate in a range of different reactions. An overview of recent methods for the generation of 1-azadienes is presented, as well as their application in cycloaddition, electrocyclization, and multicomponent reactions. Consideri ...
... The ionic liquid 1-ethyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide ([C₂mim][NTf₂]) was tested as solvent for the separation of aromatic and aliphatic hydrocarbons containing 7 or 8 carbon atoms (the C₇- and C₈-fractions). The liquid–liquid equilibria (LLE) of the ternary systems (heptane + toluene + [C₂mim][NTf₂]) and (octane + ethylbenzene + [C₂mim][NTf₂]), at 25 °C, were experiment ...
... Isoprenoids are synthesized through the condensation of five-carbon intermediates, isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP), derived from two distinct biosynthetic routes: cytosolic mevalonate (MVA) and plastidial 2-C-methyl-d-erythritol 4-phosphate (MEP) pathways. 1-Hydroxy-2-methyl-2-(E)-butenyl 4-diphosphate reductase (IDS; EC 1.17.1.2), which catalyzes the last step ...
... Urinary 1-hydroxypyrene (1-OH-pyrene) is now largely considered to be a valuable biomarker of exposure of man and animals to pyrene and other polycyclic aromatic hydrocarbons (PAHs). However, from a practical and agronomic standpoint, the question remains whether such biomarking capability still holds when 1-OH-pyrene is analyzed in milk produced by ruminants. To assess this hypothesis, four goats ...
aedeagus; volatile fatty acids; secretion; monoterpenoids; sex pheromones; males; Tenebrionidae; fatty acid esters; posture; mass spectrometry; gas chromatography; females
Abstract:
... Males of the genus Parastizopus (Coleoptera: Tenebrionidae) exhibit a special pheromone-emitting behaviour. They do a headstand, expose the aedeagus and remain in this posture for a few seconds. The pheromone emitted by P. transgariepinus was collected by solid-phase micro-extraction (100 μm polydimethylsiloxane fibre) and identified as 1-tridecene by gas chromatography/mass spectrometry. Presumab ...
... Prediction of outcomes in pediatric intestinal failure is challenging but essential to guide intestinal rehabilitation and transplantation decisions. This review of intestinal failure patients spanning 10 years examines clinical details in relation to outcome to identify factors that may refine predictive accuracy. A search was conducted to identify all children with intestinal failure managed at ...
seedling growth; broadleaved evergreen forests; shade tolerance; spatial distribution; seedlings; height; forest habitats; interspecific variation; tropics; leaves; forest trees; seeds; ontogeny; canopy gaps; mortality; understory; tree growth; chemical composition; saplings; forest regeneration; chemical constituents of plants; light; Uganda
Abstract:
... The spatial distribution of tree juveniles in relation to light environments may reflect species differences in growth, survival, and functional traits and will shape the nature of forest regeneration. Long-term field experiments are important to evaluate this issue because of the potentially very long juvenile period in trees. Here, we combine a 10-year seedling survival-growth data with the resu ...
... Phosphorus (P) inputs (wet deposition and fertilizer P) and outputs (animal product and drainflow) were studied on reseeded grazed grassland swards receiving different nitrogen (N) inputs (100-500 kg N ha⁻¹ year⁻¹) for 10 years (March 1989-February 1999), at an experimental site in Northern Ireland. All plots received the same maintenance application of P fertilizer (8.5 kg P ha⁻¹ year⁻¹) to meet ...
estuaries; marine sediments; sediment contamination; heavy metals; history; geochemistry; China
Abstract:
... The estuarine and coastal system plays an important role of sedimentation deposition which acts as sink of particle associated contaminants such as heavy metals and polycyclic aromatic hydrocarbons. Sediments conserve important information about past conditions of its aquatic environments. The chronology was developed by using the accumulation rates determined previously from ²¹⁰Pb analyses of the ...
biogeography; community structure; decline; eutrophication; lakes; life history; macroalgae; macrophytes; mosses and liverworts; niches; nitrogen; nutrients; organic matter; phosphorus; phytoplankton; probability; sediments; shade; species diversity; summer; vegetation; Denmark
Abstract:
... 1. We analysed the development of submerged macrophytes in Lake Fure, Denmark, experiencing a 30-fold increase of phosphorus input from year 1900 to 1970 and a subsequent decline to twice the 1900 level in 2005. Nutrient enrichment stimulated phytoplankton growth and restricted macrophyte distribution by reducing water transparency from a summer mean of 5-6 m in the early 1900s to a minimum of 1.6 ...
... Accurate face recognition is critical for many security applications. Current automatic face-recognition systems are defeated by natural changes in lighting and pose, which often affect face images more profoundly than changes in identity. The only system that can reliably cope with such variability is a human observer who is familiar with the faces concerned. We modeled human familiarity by using ...
... The life-history characteristics and demography of Polygonum thunbergii Sieb. et Zucc. (Polygonaceae) are described here. This is a typical annual species of the Polygonaceae, extending widely over wetlands in the lowlands of the Japanese Islands and in north-eastern Asia. A unique feature of P. thunbergii is that each individual plant possesses two reproductive systems, that is, chasmogamy and cl ...
... A simple and highly specific protein detection system using glycoconjugated gold nanoparticles was investigated. This system was based on the aggregation of gold nanoparticles coated with carbohydrate alkanethiols in the presence of corresponding proteins (lectins) that had specific recognition for certain carbohydrates. In order to construct an efficient specific recognition system, maltoside alk ...
... Th1 cytokines and microbial lipopolysaccharides (LPS) activate macrophages to produce inflammatory mediators and effector molecules. Althrough Th2 cytokines often have an opposite action to Th1 cytokines and down-modulate the inflammatory response of macrophages, they can induce a distinct alternative activation that is beneficial in host defence. In this study, we report that IL-13 enhances the a ...