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... 24-Epibrassinolide (EBL) is considered the most probable brassinosteroid (BR) candidate that could be used for practical application in agriculture. EBL-induced stress-protective properties were evaluated in in vitro-grown tomato (Solanum lycopersicum L.) varieties Pusa Ruby (susceptible to nematodes) and PNR-7 (resistant to nematodes) during nematode pathogenesis. Sterilized tomato seeds treated ...
carbonates; chemical reactions; ethylene; ligands; sulfates
Abstract:
... Novel multimetallic copper pyrazolate complexes, inaccessible using simple pyrazole ligands due to competing, alternative structural motifs, can be obtained by locking pairs of pyrazole ligands together with ethylene tethers. Nanojars based on this tethered pyrazole ligand display unexpected total selectivity for the carbonate over the sulfate ion. ...
... Changes in the activity of Na⁺/K⁺-ATPase and content of membrane lipids (phospholipids) in the gills and hepatopancreas of the blue mussel Mytilus edulis L. have been studied during a sharp temperature increase under aquarian managed conditions. The most pronounced changes were recorded in mollusk gills. A correlation of changes in the activity of membrane-bound Na⁺/K⁺-ATPase and phospholipid cont ...
Dianthus chinensis; antioxidant activity; enzyme activity; ethylene; guard cells; hydrogen peroxide; hyperhydricity; in vitro culture; in vitro studies; micropropagation; plantlets; silver nitrate; water content
Abstract:
... Hyperhydricity symptoms are common and significant during the in vitro culture of Dianthus chinensis L. and greatly affect the micropropagation and regeneration of cultured plantlets. However, effective measures for preventing such abnormalities have not been developed for this species. Silver nitrate (AgNO₃) has been shown to revert hyperhydric plantlets to a normal state. Nevertheless, the effec ...
Cephalotaxus; Fourier transform infrared spectroscopy; alkaloids; electrospray ionization mass spectrometry; isomers; nuclear magnetic resonance spectroscopy; Vietnam
Abstract:
... Eight alkaloidal constituents have been isolated and structurally elucidated from Cephalotaxus mannii Hook. f. collected from the highland Lam Dong Province, Vietnam. They are: cephalotaxine (1), isoharringtonine (2), norisoharringtonine (3), desoxyharringtonine (4), nordesoxyharringtonine (5), cephalotaxine 𝛽 -N-oxide (6), 3-epi-schellhammericine (7), and an isomer of 3-epi-schellhammericine (8) ...
Rafael R. Cantú; Celso Aita; Alexandre Doneda; Diego A. Giacomini; Alexandre Dessbesell; Marlon Arenhardt; Géssica G. De Bastiani; Stefen B. Pujol; Philippe Rochette; Martin H. Chantigny; Sandro J. Giacomini
... Alternative fertilization practices are needed for reducing gaseous and leaching N losses at high urea application rates. The objective of this study was to compare gaseous N emissions (N₂O and NH₃) and NO₃ ⁻ concentrations in the soil solution during two successive lettuce cropping seasons under contrasting fertilization practices. Treatments were fertilization with regular urea (U), urea treated ...
V. G. Pshennikova; N. A. Barashkov; A. V. Solovyev; G. P. Romanov; E. E. Diakonov; N. N. Sazonov; I. V. Morozov; A. A. Bondar; O. L. Posukh; L. U. Dzhemileva; E. K. Khusnutdinova; M. I. Tomsky; S. A. Fedorova
... Тhe DNA testing of autosomal recessive deafness type 1A (DFNB1A, MIM 220290) is complicated when deaf patients have only monoallelic (heterozygous) recessive mutations in the GJB2 (Сх26) gene that is uninformative for establishment of diagnosis. Such patients may be “random” heterozygous carriers of GJB2 mutations as well as have the mutant allele in a cis-regulatory region of GJB2 gene, in elemen ...
... Biliary atresia (BA) is a rare and serious liver disease in newborn infants. Previously, we reported that non-parenchymal cell (NPC) fractions from cirrhotic liver of BA may contain hepatic stem/progenitor cells in primary culture of NPC fractions. In this study, NPC fractions were subjected to primary or passage culture and found that clusters of hepatocyte-like cells appear even without adding h ...
... Recent articles have provided estimates of evaporative flux from water tables in deserts that span 5 orders of magnitude. In this paper, we present an analytical calculation that indicates aquifer vapor flux to be limited to 0.01 mm/yr for sites where there is negligible recharge and the water table is well over 20 m below the surface. This value arises from the geothermal gradient, and therefore, ...
... The emergence and disappearance of antigenic variants of foot-and-mouth disease virus (FMDV) during a field outbreak occurs periodically due to the volatile nature of its genome. In the present analysis, change in antigenic behavior of serotype O FMDV during the serial cytolytic passage in the absence of immune pressure was observed. Initially, the isolate showed a poor antigenic match (relationsh ...
... The ability of alkalophilic micromycetes of the Emericellopsis alkalinа to produce antimicrobial peptides has been studied. Evaluation of the spectrum and the yield of antibiotic compounds has allowed us to choose a promising producer of peptide antimycotics, Emericellopsis аlkalinа А118. The producer exhibits antifungal activity against conditionally pathogenic yeast and mold fungi, i.e., Candida ...
DNA damage; antioxidant activity; apigenin; apoptosis; cytotoxicity; diabetes; enzyme activity; enzymes; free radical scavengers; in vitro studies; islets of Langerhans; lipid peroxidation; oxidative stress; protective effect; protein synthesis; rats; reactive oxygen species; streptozotocin; therapeutics; transcription (genetics)
Abstract:
... Pancreatic beta cells are very sensitive to oxidative stress, which is one of the major causes of cell damages in diabetes. Growing interest has focused on the development of effective therapeutics to protect pancreatic cells from oxidative stress and searching for potentially protective antioxidants for treating diabetes. Apigenin, a plant-derived flavonoid, was investigated to determine whether ...
... On behalf of the journal, the American Geophysical Union, and the scientific community, the editors would like to sincerely thank those who reviewed manuscripts for Water Resources Research in 2016. Their time spent reading and commenting on manuscripts not only improves the manuscripts themselves but also increases the scientific rigor of future research in the field. Many of those listed below w ...
... Somaclonal variation refers to the genetic and epigenetic changes in plants regenerated from plant tissue culture. In this study, using intersimple sequence repeat (ISSR) molecular markers, the somaclonal variation during micropropagation of sugarcane using temporary immersion bioreactors (TIBs) was evaluated. Apices of the cultivar Mex 69-290 were established and multiplied by ten subcultures in ...
... The association of polymorphism T-786C of the endothelial NO-synthase gene NOS3 with the functional state of the left ventricle (LV) was studied among residents of the West Siberian region with ischemic heart disease (IHD), including that combined with diabetes mellitus type 2 (DMT2). Carriers of genotype–786TT had the greatest ejection fraction of the left ventricle in the group of patients witho ...
... River networks that drain mountain landscapes alternate between narrow and wide valley segments. Within the wide segments, beaver activity can facilitate the development and maintenance of complex, multithread planform. Because the narrow segments have limited ability to retain water, carbon, and nutrients, the wide, multithread segments are likely important locations of retention. We evaluated hy ...
Daniela Gabriel; Stefano G.A. Draisma; William E. Schmidt; Tom Schils; Thomas Sauvage; Clio Maridakis; C. Frederico D. Gurgel; D. James Harris; Suzanne Fredericq
Gibsmithia; algae; genetic markers; new species; phylogeny; Egypt; Federated States of Micronesia; Hawaii; Indonesia; Philippines; Red Sea; Saudi Arabia
Abstract:
... The tropical alga previously recognized as Gibsmithia hawaiiensis (Dumontiaceae, Rhodophyta) was recently suggested to represent a complex of species distributed throughout the Indo‐Pacific Ocean and characterized by a peculiar combination of hairy (pilose) gelatinous lobes growing on cartilaginous stalks. Phylogenetic reconstructions based on three genetic markers are presented here with the incl ...
... Azospirillum lipoferum Sp59b microbial cells were immobilized on the surface of thin polystyrene films modified in plasma from a high-frequency discharge of argon (13.56 MHz). The optimal conditions for immobilization, under which cell activity was maintained with respect to specific bacteriophages, were established. It was shown that it is possible to record the interaction of immobilized microbi ...
... Approximately half of the Padina (Dictyotales, Phaeophyceae) species mineralize aragonite needles over the adaxial thallus surface, where mineral bands are interspersed with nonmineralized regions along the thallus from the apical to basal end. However, this calcification pattern and the related algal properties are not well understood. Therefore, this work was performed to elucidate a potential r ...
Vaccinia virus; binding capacity; genes; mass spectrometry; proteins
Abstract:
... Identification of viral-host interacting proteins will contribute to understanding of how poxvirus exploits the host cellular machinery. The vaccinia virus gene K7R encodes a conserved protein K7 in most orthopoxviruses. To gain insight into the biology of K7, we investigated the cellular interactome of K7 by GST pulldown coupled with mass spectrometry. The top categories of identified proteins co ...
Whites; databases; frequency distribution; gene frequency; genome; genotype; loci; risk; single nucleotide polymorphism; stroke
Abstract:
... With the aim to determine specific genetic characteristics of the population of Moscow region, we determined allele frequencies of 48 polymorphic loci (SNP) associated with the increased risk of ischemic stroke development. The genotype frequency distribution for all the SNPs corresponds to Hardy–Weinberg equilibrium. Comparison of the allele frequencies with those obtained for Caucasian populatio ...
... The process of leaching of copper-zinc concentrate with a solution containing biogenic iron, which is a product of the metabolism of iron-oxidizing microorganisms, was studied. The dependence of leaching rate of metals on temperature and pH was determined. It was shown that up to 98% of zinc and 70% of iron could be removed from the concentrate, while up to 7 and 4 g/L of zinc and copper, respecti ...
advection; bitumen; byproducts; dissolved chlorides; geochemistry; lakes; mass transfer; oils; research; water
Abstract:
... Fluid fine tailings (FFT) are a principal by‐product of the bitumen extraction process at oil sands mines. Base Mine Lake (BML)—the first full‐scale demonstration oil sands end pit lake (EPL)—contains approximately 1.9 × 10⁸ m³ of FFT stored under a water cover within a decommissioned mine pit. Chemical mass transfer from the FFT to the water cover can occur via two key processes: (1) advection‐di ...
... Using collars for measuring soil respiration and its component fluxes in closed chamber systems relies on two main assumptions. Firstly, it is assumed that shallow collars prevent lateral soil gas leakage beneath the chamber’s walls and the underestimation of soil CO₂ fluxes, and secondly, the insertion of deeper collars excises all living roots and the autotrophic flux is eliminated. It was hypot ...
DNA; DNA barcoding; Phenacoccus solenopsis; biological control; biological control agents; cotton; genes; haplotypes; insects; mitochondria; nucleotide sequences; parasitoids; France; Pakistan
Abstract:
... Because correct identification of insects is crucial for pest management involving chemical or biological control agents, we have used a molecular approach to identify and characterize specimens of the cotton pest Phenacoccus solenopsis Tinsley (Sternorrhyncha: Pseudococcidae) present in different regions of Pakistan. The specimens were analyzed through DNA sequence analysis of their mitochondrial ...
air; carbon dioxide; rural areas; spectroscopy; stable isotopes; typhoons; urban areas; water vapor; Japan
Abstract:
... Isotope ratios of carbon dioxide and water vapour in the near-surface air were continuously measured for one month in an urban area of the city of Nagoya in central Japan in September 2010 using laser spectroscopic techniques. During the passages of a typhoon and a stationary front in the observation period, remarkable changes in the isotope ratios of CO ₂ and water vapour were observed. The isoto ...
... Herein is reported the mild and general coupling of amine/ether C(sp³)–H bonds with various kinds of C(sp²)–O electrophiles with high selectivity and efficiency. Valuable allylic/benzylic amines are generated in moderate to excellent yields. The utility of this transformation is demonstrated by a broad substrate scope (>50 examples), good functional group tolerance and facile product modification. ...
... We describe a novel species of torque teno mini virus called TTMV-204, which was isolated from the gingival epithelium of patients with periodontitis and characterized using viral metagenomics. The sequence of the full genome is 2824 nt in length. Phylogenetic analysis and genetic analyses show classic Betatorquevirus species organization with less than 40% amino acid similarity in ORF1. The preva ...
Markov chain; Monte Carlo method; fluorescein; hyporheic zone; models; research; solutes; sorption; streams; system optimization; water
Abstract:
... The complexity of hyporheic flow paths requires reach‐scale models of solute transport in streams that are flexible in their representation of the hyporheic passage. We use a model that couples advective‐dispersive in‐stream transport to hyporheic exchange with a shape‐free distribution of hyporheic travel times. The model also accounts for two‐site sorption and transformation of reactive solutes. ...
Markov chain; hydrologic data; prediction; research; sample size; water
Abstract:
... In this study, a copula‐based particle filter (CopPF) approach was developed for sequential hydrological data assimilation by considering parameter correlation structures. In CopPF, multivariate copulas are proposed to reflect parameter interdependence before the resampling procedure with new particles then being sampled from the obtained copulas. Such a process can overcome both particle degenera ...
energy balance; enthalpy; equations; freeze-thaw cycles; frozen soils; models; research; snow; snowpack; soil temperature; soil water; uncertainty; winter; China
Abstract:
... Snow and frozen soil are important factors that influence terrestrial water and energy balances through snowpack accumulation and melt and soil freeze‐thaw. In this study, a new land surface model (LSM) with coupled snow and frozen soil physics was developed based on a hydrologically improved LSM (HydroSiB2). First, an energy‐balance‐based three‐layer snow model was incorporated into HydroSiB2 (he ...
... Most of the solar-driven thermochemical CO₂ dissociation reactions have been focused on two-step processes. In this study, a one step CO₂ thermolysis process was considered. It was found that direct thermolysis of CO₂ obviously occurred at temperatures as low as 1200 °C within a corundum tube. The reaction rate could be enhanced by several times in the presence of metal oxides, which may be attrib ...
... We report a chemiresistive sensor approach based on a TTF–TCNQ charge transfer material, which can real-time detect and distinguish the vapors of alkyl amine and aromatic amine species under ambient conditions, based on the dramatic difference in the kinetics of the electric current recovery processes after the exposure of the two amine species. ...
... The aggregation-induced emission (AIE) effect has recently been widely applied for biomarker sensing. But developing “smart” strategies to effectively aggregate the AIE fluorogen and additionally enhance the fluorescence emission remain challenging. In this work, by integrating a biocompatible condensation reaction with an AIE fluorogen, we rationally designed a “smart” dual AIE probe Ac-Arg-Val-A ...
... The effect of potassium sorbate, sodium benzoate, and sodium nitrite used as preservatives in the food industry in the production of such mytotoxins as citrinin cyclopiazonic and mycophenolic acids by the contaminating fungi Penicillium citrinum, P. commune, and P. brevicompactum, respectively, was investigated. It was shown that the effect of preservatives used at concentrations relevant to the f ...
hydraulic flumes; models; research; rivers; streams; surveys; topography; water
Abstract:
... We focus on the measurement of the bed‐elevation of braided networks in flume experiments. In particular, the effect of the survey frequency on the measurement accuracy is studied. To this aim, an innovative measurement system is adopted. It consists of a laser‐ultrasonic sensor and can survey the bed‐elevation under flowing water. This measurement system was used to profile a flume transect with ...
... We report the detection of rabbit haemorrhagic disease virus 2 (RHDV2) in the Madeira archipelago, Portugal. Viral circulation was confirmed by RT-qPCR and vp60 sequencing. Epidemiological data revealed the outbreak initiated in October 2016 in Porto Santo affecting wild and domestic rabbits. It was then detected three months later on the island of Madeira. Five haplotypes were identified and a ge ...
... The widely used plastic film containing di(2-ethylhexyl) phthalate (DEHP) in agriculture has caused serious soil pollution and poses risks to human health through the food chain. An effective DEHP degradation bacteria, Microbacterium sp. J-1, was newly isolated from landfill soil. Response surface methodology was successfully employed for optimization resulting in 96% degradation of DEHP (200 mg L ...
absorption; chemical compounds; chemical reactions
Abstract:
... Dissymmetrical substitution of norcorrole enables the preparation of various norcorrole derivatives as air- and moisture-stable species. Intramolecular charge transfer interactions between electron-donating substituents and the norcorrole core in these norcorroles significantly enhanced their low-energy absorption bands, which were forbidden in symmetrical Niᴵᴵ dimesitylnorcorrole. ...
Solanum betaceum; aspartic proteinases; callus; cell suspension culture; fluorometry; glycolysis; growth models; in vitro studies; liquids; mass spectrometry; metalloproteinases; protein composition; proteins; proteolysis; serine proteinases; somatic embryogenesis; xylanases
Abstract:
... Somatic embryogenesis (SE) is an important biotechnological tool with great potential for large-scale cloning. In Solanum betaceum Cav. (tamarillo), embryogenic (EC) and non-embryogenic (non-EC) cells can be obtained from the same explant on auxin-containing medium, making this system ideal for the evaluation of biochemical changes occurring during embryogenic induction. Liquid cultures offer addi ...
... Safed musli (Chlorophytum borivilianum Santapau & R.R.Fern.) is a medicinal herb valued for its tuberous roots that contain several bioactive compounds. Conventionally, safed musli tubers are harvested for secondary metabolites 9 mo after planting. Alternatively, in vitro culture can be used for mass production and to shorten the time required to produce secondary metabolites. This study was desig ...
... Primary mouse intestinal epithelial cells (MIEs) are not ideal models for long-term culture in vitro and a limited amount of approximate three generations. In addition, the mechanism that arginine-arginine dipeptide (Arg-Arg) regulates mouse intestinal inflammatory response remains unknown. Therefore, the aim of this study was to establish immortal MIEs and study the effects of Arg-Arg on inflamma ...
Soil and Water Assessment Tool model; drinking water; equations; model validation; monitoring; nitrate nitrogen; nitric oxide; nutrient content; nutrients; prediction; temperature; water supply; watersheds; wetlands; Gulf of Mexico
Abstract:
... The ability to accurately simulate flow and nutrient removal in treatment wetlands within an agricultural, watershed-scale model is needed to develop effective plans for meeting nutrient reduction goals associated with protection of drinking water supplies and reduction of the Gulf of Mexico hypoxic zone. The objectives of this study were to incorporate new equations for wetland hydrology and nutri ...
... Defensins are abundant in cells and tissues that are involved in host defense against microbial infections. zfDB3 (zebrafish β-defensin 3) is one of 3 copies of defensin β-like genes from zebrafish (Danio rerio). Here we focus on mzfDB3, which is the gene encoding for the zebrafish β-defensin 3 mature peptide. A codon-optimized mzfDB3 gene with a 6×His-tag at the 3′-end was inserted into the pPICZ ...
... In the summer of 2015, a series of thermal tracer tests were conducted at the Widen field site in northeast Switzerland to validate travel time‐based thermal tracer tomography for reconstruction of aquifer heterogeneity. Repeated thermal tracer tests and distributed temperature observations were used to obtain a multisource/multireceiver tomographic experimental setup. After creating forced hydrau ...
alkaloids; amines; ammonia; antioxidant activity; free radicals; taxifolin; water solubility
Abstract:
... The reaction of dihydroquercetin monosuccinate with ammonia, a series of alkylamines, and amino-derivatives of heterocyclic compounds including nitroxyl radicals and alkaloids produced the corresponding ionic conjugates, the water solubility of which was 1–2 orders of magnitude greater than that of dihydroquercetin with retention of the high antioxidant activity. ...
... Since 2014, cases of hemangioma associated with avian leukosis virus subgroup J (ALV-J) have been emerging in commercial chickens in Guangxi. In this study, four strains of the subgroup J avian leukosis virus (ALV-J), named GX14HG01, GX14HG04, GX14LT07, and GX14ZS14, were isolated from chickens with clinical hemangioma in 2014 by DF-1 cell culture and then identified with ELISA detection of ALV gr ...
... The intraspecific structure of the European anchovy (Engraulis encrasicolus) was studied on the basis of mitochondrial cytochrome b gene (cytb) fragment variability in 84 individuals from seven localities of the Black Sea and the Sea of Azov. The data on haplotype and nucleotide diversity and the values of neutrality tests suggested expansive growth of anchovy populations in the Azov-Black Sea bas ...
... To date, the efficacy of the phenylalanine hydroxylase (PAH) cofactor is proved for the treatment of both BH4-dependent hyperphenylalaninemia and phenylketonuria patients with mutations in the PAH gene. Since the patient’s response depends on the presence of residual PAH enzyme activity, it is advisable to search for mutations in the PAH gene to identify the potential responders and nonresponders ...
... A gold-catalyzed sequential annulation reaction to prepare 3,4-fused bicyclic furan compounds has been realized by employing 2-(1-alkynyl)-2-alken-1-ones and 1,3,5-triazines as the starting materials under mild reaction conditions. This protocol features multiple bond formation in a single operation with the incorporation of two nitrogen and two carbon atoms into the final products. A mechanistic ...
... We evaluated the impact of exponential fertilization in nursery and weed removal in the field on growth and nitrogen (N) retranslocation and uptake from the soil of jack pine (Pinus banksiana Lamb.) seedlings planted on an oil sands reclaimed soil. Exponential fertilization is a method of supplying nutrients at an exponential rate to achieve constant internal nutrient concentrations in seedlings w ...
Hepatitis B virus; Retroviridae; chromosomes; hepatoma; human cell lines; humans; messenger RNA; transactivators; transcription factor NF-kappa B; trophoblast
Abstract:
... Human endogenous retrovirus W family (HERV-W) envelope (env) at chromosome 7 is highly expressed in the placenta and possesses fusogenic activity in trophoblast development. HERV-W env has been found to be overexpressed in some cancers and immune diseases. Viral transactivators can induce the overexpression of HERV-W env in human cell lines. Hepatitis B virus X protein (HBx) is believed to be a mu ...
household surveys; issues and policy; prices; research; water; water pollution; water shortages; China
Abstract:
... China continues to deal with severe levels of water scarcity and water pollution. To help address this situation, the Chinese central government initiated urban water pricing reforms in 2002 that emphasized the adoption of increasing block rate (IBR) price structures in place of existing uniform rate structures. By combining urban water use records with microlevel data from the Chinese Urban House ...
Herpesvirales; bioactive properties; gene transfer; hosts; immunomodulators; interleukin-10; major histocompatibility complex; natural killer cells; protein structure; proteins; virus replication
Abstract:
... Herpesviruses have acquired numerous genes from their hosts. Although these homologs are not essential for viral replication, they often have important immunomodulatory functions that ensure viral persistence in the host. Some of these viral molecules are called virokines as they mimic cellular cytokines of their host such as interleukin-10 (cIL-10). In recent years, many viral homologs of IL-10 ( ...
Bacillus subtilis; biofilm; electron microscopy; environmental factors; polymers; research; sediment transport; sediments; shear stress; water
Abstract:
... Extracellular polymeric substances (EPS) are ubiquitous on tidal flats but their impact on sediment erosion has not been fully understood. Laboratory‐controlled sediment beds were incubated with Bacillus subtilis for 5, 10, 16, and 22 days before the erosion experiments, to study the temporal and spatial variations in sediment stability caused by the bacterial secreted EPS. We found the biosedimen ...
... Compared with Li₄Ti₅O₁₂, LiCrTiO₄ with the same spinel structure exhibits superior conductivity and Li⁺ diffusion properties. However, there has been no extensive study on LiCrTiO₄ as an anode material in lithium ion batteries, due to its pulverization, loss of electrical contact, and particle aggregation. A unique architecture based on hybrid porous CNTs embedding ultrasmall LiCrTiO₄ nanoparticle ...
Arabidopsis thaliana; catalase; chlorophyll; enzyme activity; genes; genotype; growth retardation; hydrogen peroxide; leaves; peroxidase; proline; salicylic acid; salt stress; salt tolerance; signal transduction; sodium chloride; superoxide dismutase
Abstract:
... The effect of hydrogen peroxide treatment on the salt tolerance of wild-type Arabidopsis thaliana L. plants (Col-0) and plants transformed with the bacterial salicylate hydroxylase gene (NahG) was studied. The base tolerance to salt stress caused by 200 mM of NaCl in solution culture was higher in plants with the NahG genotype in comparison with the wild-type plants. Growth inhibition was observed ...
females; freezing; in vitro fertilization; in vitro studies; males; metaphase; mice; oocytes; semen; survival rate; vitrification
Abstract:
... Oocyte incubation time before freezing is one of the factors affecting oocyte vitrification. In the assisted reproductive technology (ART) clinics, it is sometimes decided to perform oocyte vitrification after a long period of incubation time due to various conditions, such as inability to collect semen samples, unsuccessful urological interventions (PESA, TESE, etc.), or unexpected conditions. A ...
cathodes; chemical reactions; ions; sodium; thermodynamics
Abstract:
... In operando powder X-ray diffraction data reveals an unexpected structural evolution in a layered P2 type NaₓCo₀.₇Mn₀.₃O₂ material during cycling. The population of single crystallographic sites sometimes increases even though sodium ions are being extracted from the structure, implying a highly cooperative diffusion mechanism. The structural evolution is shown to proceed through a series of metas ...
chemical bonding; pH; polymerization; polymers; temperature
Abstract:
... In situ fabrication of a temperature and pH dual-responsive linear supramolecular polymer through the marriage of dynamic covalent bonding and pillar[5]arene-based host–guest interaction was investigated. ...
... 9H-[1,2,4]Triazolo[4,3-g]purin-5-amine (2) was synthesized by reaction of 6-hydrazinyl-7H-purin-2-amine (1a) with formic acid under reflux conditions. Treating compound 1a in ethanol with CS₂ in the presence of KOH yielded 5-amino-3H-[1,2,4]triazolo[4,3-g]purine-3-thione (3). The new synthesized compounds were characterized using IR, ¹H NMR, and elemental analysis. The synthesized compounds have b ...
friction velocity; hypoxia; oxygen; oxygen consumption; research; sediments; systems engineering; turbulent flow; water; water management; water quality
Abstract:
... Hypolimnetic oxygenation is an increasingly common lake management strategy for mitigating hypoxia/anoxia and associated deleterious effects on water quality. A common effect of oxygenation is increased oxygen consumption in the hypolimnion and predicting the magnitude of this increase is the crux of effective oxygenation system design. Simultaneous measurements of sediment oxygen flux (JO₂) and t ...
Citrus; electrical resistance; freshwater; orchards; preferential flow; research; rhizosphere; soil heterogeneity; soil restoration; soil sampling; soil water content; spring; tomography; wastewater; wastewater irrigation; water content; water flow; water repellent soils; Israel
Abstract:
... The recognition of treated wastewater (TWW) as an alternative water resource is expanding in areas with a shortage of freshwater (FW) resources. Today, most orchards in Israel are irrigated with TWW. While the benefits of using TWW for irrigation are apparent, evidence of its negative effects on soil, trees, and yield is accumulating. This study, performed in a commercial TWW‐irrigated citrus orch ...
... An artificial neural network (ANN) was used to analyze photometric features extracted from the digitized images of leaves from in vitro-regenerated potato plants for non-invasive estimation of chlorophyll content. A MATLAB®-based, feed-forward, backpropagation-type network was developed for an input layer (three input elements), with one hidden layer (one node) and one output layer representing th ...
Youngjin JangY. J. and A. S. contributed equally to this work.; Arthur Shapiro; Maya Isarov; Anna Rubin-Brusilovski; Aron Safran; Adam K. Budniak; Faris Horani; Joanna Dehnel; Aldona Sashchiuk; Efrat Lifshitz
... Semiconductor colloidal quantum dots (CQDs) have attracted vast scientific and technological interest throughout the past three decades, due to the unique tuneability of their optoelectronic properties by variation of size and composition. However, the nanoscale size brings about a large surface-to-bulk volume ratio, where exterior surfaces have a pronounced influence on the chemical stability and ...
Green-Ampt equation; air; head; hydraulic conductivity; research; soil water characteristic; water content
Abstract:
... Analytical and numerical solutions for flow through partially saturated soils typically require functional relationships between water content, pressure, and hydraulic conductivity. Here we propose a Weibull‐type function to describe the hydraulic conductivity‐pressure head function. We show that this is a more flexible function that has the ability to address air entry pressure, while retaining t ...
... Diet–tissue isotopic relationships established under controlled conditions are informative for determining the dietary sources and geographic provenance of organisms. We analysed δ ¹³C, δ ¹⁵N, and non-exchangeable δ ²H values of captive African grey parrot Psittacus erithacus feathers grown on a fixed mixed-diet and borehole water. Diet–feather Δ ¹³C and Δ ¹⁵N discrimination values were +3.8 ± 0.3 ...
air temperature; climate; data collection; lysimeters; meteorological data; relative humidity; research; shortwave radiation; snow; snowmelt; snowpack; temporal variation; water; wind speed; Austria
Abstract:
... Snow measurements at the Kühtai station in Tirol, Austria, (1920 m.a.s.l.) are described. The data set includes snow water equivalent from a 10 m² snow pillow, snow melt outflow from a 10 m² snow lysimeter placed at the same location as the pillow, meteorological data (precipitation, incoming shortwave radiation, reflected shortwave radiation, air temperature, relative air humidity, and wind speed ...
Festuca arundinacea; animal manure management; community structure; dairy manure; enzyme activity; enzymes; fertilizer application; field experimentation; forage grasses; forage yield; fungi; growing season; long term effects; microbial biomass; microbial communities; mineral fertilizers; nitrogen; nitrogen content; organic matter; perennials; phospholipid fatty acids; phosphorus; soil microorganisms; soil properties; sward; British Columbia
Abstract:
... Removing solids from liquid dairy manure slurry reduces manure phosphorus (P) and increases the available (mineral) fraction of nitrogen (N) but also decreases the organic matter content of the manure. While this novel treatment reduces environmental concerns associated with excess N and P application to soils, it may also reduce microbial biomass and activity in soil. This study evaluated the lon ...
Caloglossa; actin; alleles; animals; coasts; crossing; embryophytes; females; gametophytes; genotyping; habitats; heterozygosity; homozygosity; macroalgae; males; temperature; thallus; South Australia
Abstract:
... In animals and land plants, many asexual species originate through inter‐ or intraspecific crosses, and such heterozygous asexuals frequently are more abundant than their sexual relatives in marginal habitats. Although asexual species have been reported in various macroalgal taxa, detailed information regarding their distribution, heterozygosity, and origin is limited. Because many asexual tetrasp ...
... Mineral nutrition is directly involved in plant metabolism and greatly affects growth and development. An initial study modeling Murashige and Skoog (MS) medium mineral components revealed that the quality of red raspberry shoot cultures was significantly affected by CaCl₂, MgSO₄, and KH₂PO₄ (mesos components). This study investigated the effects of increased mesos components on shoot growth and m ...
catalysts; catalytic activity; chemical reactions; ligands; nitriles
Abstract:
... Here meso-N/C-900 derived from polypyridyl ligand DAA has been developed as a metal-free catalyst, for the first time, exhibiting good performance in catalytic ammoxidation of alcohols to nitriles. Systematic characterization suggests that the accessible mesopores and the effective pyridinic/pyrrolic-N are responsible for the unprecedented performance. ...
... Tomato mild yellow leaf curl Aragua virus (ToMYLCV) is a begomovirus first reported infecting tomato (Solanum lycopersicum) and milkweed (Euphorbia heterophylla) in Venezuela. In this study, a ToMYLCV isolate (Zulia-219) was completely sequenced and its host range was evaluated. The DNA-A and DNA-B components of isolate Zulia-219 showed 93 and 85% nucleotide sequence identity with the respective c ...
... The family Oocystaceae (Chlorophyta) is a group of morphologically and ultrastructurally distinct green algae that constitute a well‐supported clade in the class Trebouxiophyceae. Despite the family's clear delimitation, which is based on specific cell wall features, only a few members of the Oocystaceae have been examined using data other than morphological. In previous studies of Trebouxiophycea ...
Bayesian theory; Markov chain; research; uncertainty; water
Abstract:
... We present a newly developed Multivariate Copula Analysis Toolbox (MvCAT) which includes a wide range of copula families with different levels of complexity. MvCAT employs a Bayesian framework with a residual‐based Gaussian likelihood function for inferring copula parameters and estimating the underlying uncertainties. The contribution of this paper is threefold: (a) providing a Bayesian framework ...
... A new amide, pipertaiwanamide (1), has been isolated from the aerial part of Piper taiwanense, together with four known compounds, taiwanamide A (2), taiwanamide B (3), 1-cinnamoylpyrrolidine (4), and N-cinnamoyltyramine (5). The structure of the new compound 1 was determined through spectroscopic and MS analyses. Pipertaiwanamide (1) and N-cinnamoyltyramine (5) exhibited free radical scavenging a ...
Cyclea; chemical structure; glucosides; lignans; spectral analysis
Abstract:
... A new lignan glucoside 1, along with two known lignans (2, 3), was isolated from Cyclea racemosa Oliv. Its structure was elucidated as (+)-7′-methoxylariciresinol 4-O-β-D-glucopyranoside on the basis of extensive spectroscopic analyses. ...
Digitalis ferruginea; fruit extracts; glycosides; pericarp
Abstract:
... Nine steroidal compounds, three of which were new (two furostanol and one spirostanol glycosides), were isolated from pericarp of Digitalis ferruginea L. fruit. ...
Apocynaceae; acetates; cytotoxicity; inhibitory concentration 50; leaves; lupane; mass spectrometry; neoplasm cells; nuclear magnetic resonance spectroscopy; stigmasterol; viability
Abstract:
... A new oleanane derivative, 3β-acetyloleana-5,12-dien-2,23-diol (1), and a new lupane compound, lup-11,20(29)-dien-3 β,28-diol (2), together with eight known compounds, oleana-5,12-dien-3β-yl acetate (3), lup-5,20(29)-dien-3 β -yl acetate (4), 18-methylethylnonadecan-19-oic-9-enoate (6), octadecane (5), cis-pentadec-7-enoic acid (7), cis-tetradec-7,10-dienoic acid (8), cholest-4-en-3-one (9), and s ...
... Contrasting chromosome location of nucleolar organizing regions (NORs), a poorly studied differentiating feature of two karyoforms of the 46-chromosome common voles, arvalis and obscurus, is demonstrated in the heterozygous karyotype of a natural hybrid from the arvalis/obscurus contact zone in European Russia. It was deduced from the karyotype analysis that the obscurus form was parental in this ...
... Rock heterogeneity plays an important role in solute spreading and mixing in hydrogeologic systems. Few observations, however, have been made that can spatially resolve these processes in 3‐D, in consolidated rocks. We make observations of the spatially resolved steady state concentration of a sodium iodide solute while flowing brine through cylindrical rock cores using X‐ray CT imaging. Three roc ...
chemical compounds; graphene; photochemical reactions
Abstract:
... The photoexcitation of the pyrene dimer on graphene resulted in the final formation of a charge-separated state following an exciplex formation, while that of the pyrene monomer on graphene generated the corresponding exciplex solely due to the difference in the electronic coupling between the pyrene and the graphene. ...
... A diploid population is analyzed with respect to the set of L autosomal loci. The attention is focused on the description of possible gametic disequilibria defined as deviations of the current population state from the reference state with the same allelic concentrations but with independent combination of alleles in gametes. The disequilibrum description is not based on any assumptions about micr ...
... We used multiple sources of remotely sensed and ground based information to evaluate the spatiotemporal variability of snowpack accumulation, potential evapotranspiration (PET), and Normalized Difference Vegetation Index (NDVI) throughout the Southern Rocky Mountain ecoregion, USA. Relationships between these variables were used to establish baseline values of expected forest productivity given wa ...
Monte Carlo method; data collection; groundwater; model validation; neural networks; prediction; research
Abstract:
... The continuing rapid expansion of industrial and consumer processes based on nanoparticles (NP) necessitates a robust model for delineating their fate and transport in groundwater. An ability to reliably specify the full parameter set for prediction of NP transport using continuum models is crucial. In this paper we report the reanalysis of a data set of 493 published column experiment outcomes to ...
... Migrating bedforms have high levels of particulate organic matter and high rates of pore water exchange, causing them to be proposed as hot spots of carbon turnover in rivers. Yet, the shifting of sediments and associated mechanical disturbance within migrating bedforms, such as ripples, may stress and abrade microbial communities, reducing their activity. In a microcosm experiment, we replicated ...
Róbert Szabó; Lukáš Radosa; Martina Ličková; Monika Sláviková; Marta Heroldová; Michal Stanko; Milan Pejčoch; Anja Osterberg; Lies Laenen; Susanne Schex; Rainer G. Ulrich; Sandra Essbauer; Piet Maes; Boris Klempa
screening; humans; Puumala orthohantavirus; topology; genome; phylogeny; Clethrionomys glareolus; disease outbreaks; homologous recombination; voles; RNA; forests; Central European region; Germany; Czech Republic; Slovakia; Western European region
Abstract:
... Puumala virus (PUUV), carried by bank voles (Myodes glareolus), is the medically most important hantavirus in Central and Western Europe. In this study, a total of 523 bank voles (408 from Germany, 72 from Slovakia, and 43 from Czech Republic) collected between the years 2007–2012 were analyzed for the presence of hantavirus RNA. Partial PUUV genome segment sequences were obtained from 51 voles. P ...
Dinophyceae; electron microscopy; new species; phylogeny; Baltic Sea; Germany
Abstract:
... One of the most common marine dinophytes is a species known as Heterocapsa triquetra. When Stein introduced the taxon Heterocapsa, he formally based the type species H. triquetra on the basionym Glenodinium triquetrum. The latter was described by Ehrenberg and is most likely a species of Kryptoperidinium. In addition to that currently unresolved nomenclatural situation, the thecal plate compositio ...
chemical reactions; composite polymers; energy; fluorine
Abstract:
... The position at which conjugated side chains were fluorinated, the meta- or ortho-position in phenyl side chains, was varied to investigate the positional effects of fluorination on the energy levels, crystalline ordering, and photovoltaic properties of the polymers. The fluorine in the ortho-position achieved a lower HOMO energy level than that in the meta-position, but reduced the chain rigidity ...
DNA libraries; calcium phosphates; mineralization; nucleotide aptamers; systematic evolution of ligands by exponential enrichment
Abstract:
... DNA aptamers that enhance calcium phosphate mineral formation were identified using a novel precipitation SELEX method. The evolved DNA library was substantially enriched in G nucleotides and in predicted G-quadruplex structures, suggesting their importance in the mechanism of mineralization. This work could readily be extended to provide additional novel DNA aptamers for materials synthesis. ...
... Neutrophils undergo cell death processes once their physiological function has been fulfilled. Apoptosis, necrosis, pyroptosis, or NETosis, a unique form of cell death, could occur, depending on the type of stimulant or inhibitory intervention. We investigated whether phorbol myristate acetate (PMA) and Klebsiella pneumoniae (KP), serving as stimulants, or whether an inhibitor (cytochalasin B, Cyt ...
... We report methylations of alcohols and anilines catalyzed by DMF-stabilized Ir nanoclusters using methanol as the C1 source. The DMF-stabilized Ir nanoclusters were prepared in one step and have diameters of 1–1.5 nm. They react in a borrowing-hydrogen reaction and are efficient methylation catalysts (TON up to 310 000). ...
... The amount of Rice stripe virus (RSV) maintained through transovarial transmission was analyzed during the development and reproduction of its vector, Laodelphax striatellus. Reverse transcription quantitative PCR analysis was used to quantify RNA expressed from the RSV coat protein (CP) gene as an estimate of RSV content in nymphs and adults of L. striatellus at various developmental stages. The ...
... A new method to directly modify the surface structure and energy levels of a porphyrin monolayer was examined in the molecular scale using scanning tunneling microscopy and spectroscopy (STM and STS) and presented in this communication. The exposure to atomic oxygen has induced highly ordered surface cross-linking and changed the occupied and unoccupied orbital levels of a cobalt(ii) octaethyl por ...
... Activity concentrations of ¹³⁴Cs and ¹³⁷Cs were determined in mushrooms of the Boletus species B. aereus , B. reticulatus , B. appendiculatus , B. calopus , B. edulis , B. erythropus , B. fechtneri, B. pinophilus , B. pseudoregius , B. rhodopurpureus , B. rhodoxanthus collected in the Reggio Emilia, Italy, in 1993 and 1994 and in B. edulis collected in Pomerania in northern Poland in the period fr ...
... The design of enzyme compositions for the preparation of functional hydrolysates of whey proteins is studied. Analysis of the protein profiles of the whey from hard, semihard, and soft cheeses showed that the whey contains 50–63% β-lactoglobulin, 19–20% α-lactalbumin, and up to 11% κ-casein. According to the protein profile, the whey from Circassian cheese contains 76% casein (α-, β-, and κ-casein ...
chemical reactions; chemical structure; methanol; sulfuric acid
Abstract:
... Treatment of 5-iodo-1,3,6-trimethyluracil or 5-bromo-1,3,6-trimethyluracil with H₂SO₄ (5%) in the presence of an excess of KI at 80°C for 5 h produced 1,3,6-trimethyluracil as the only product. Analogous treatment of N-bromo-6-iodomethyluracil gave a mixture with 5-bromo-6-iodomethyluracil as the main constituent. The reaction with an excess of KI in MeOH at 50°C formed 5-bromo-6-hydroxymethylurac ...
... Apterous viviparous females of Neoamphorophora ledi (Wahlgren, 1938) living on Rhododendron degronianum Carr. (Ericaceae) on Honshu island, Japan, are redescribed and the hitherto unknown alate viviparous females are here described. Rhododendron degronianum is a new host plant species for this aphid. This species is recorded for aphid fauna of Eastern Palearctic for the first time. Keys to species ...
... Geologic ultrafiltration—slowing of solutes with respect to flowing groundwater—poses a conundrum: it is consistently observed experimentally in clay‐rich lithologies, but has been difficult to identify in subsurface data. Resolving this could be important for clarifying clay and shale transport properties at large scales as well as interpreting solute and isotope patterns for applications ranging ...
... We report a strong acceleration of Fenton degradation as well as the expansion of its working pH range by using thioglycolic acid (TGA) to accelerate the Fe(iii)/Fe(ii) redox cycle. A rapid degradation of organic and microbial pollutants was realized in this novel system, using a catalytic amount of iron and TGA, under environmentally relevant conditions. ...