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... Commercially available sunflower oil and the same oil distilled additionally in a molecular evaporator (to remove naturally occurring compounds) was spiked with benzo[a]pyrene (BaP) at the levels of 37.1 and 38.6 μg/kg, respectively. Then, it was filled into polyethylene terephtalate (PET) and low density polyethylene (LDPE) receptacles of cylindrical shape, and BaP concentration was followed w ...
... From available and bio-sourced methyl esters, monoglycerides or oleic sunflower refined oil, the corresponding 1-O-alkyl (di)glycerol ethers were obtained in both high yields and selectivity by two different pathways. With methyl esters, a reductive alkylation with (di)glycerol was realized under 50 bar hydrogen pressure in the presence of 1 mol% of Pd/C and an acid co-catalyst. A second two step ...
... Before the Spaniards conquered America in 1492, several ancient cultures and empires – the Aztec, Maya, Inca, and Mapuche, among them – already inhabited the two continents and had made important advances in the arts and sciences as well as in architecture, astronomy, agriculture and the domestication of crops. These peoples lived according to their own rules and in harmony with their magnificent ...
... The ¹⁵N dilution method was used for the quantitative estimation of nitrogen dioxide (NO₂) absorbed by Helianthus annuus and Zea mays during a relatively long period. The relationships between the amount of NO₂ absorbed and the concentration of NO₂ and length of exposure were investigated, in order to ascertain the reliability of this method. The total amount of NO₂‐nitrogen absorbed by the plants ...
Helianthus annuus; National Center for Biotechnology Information; bacterial communities; biofertilizers; bioinformatics; community structure; data collection; endophytes; genes; polymerase chain reaction; rain; summer; temperature; winter; South Africa
Abstract:
... Insights into plant endosphere bacterial diversity and exploration of their bioincentives in the formulation of biofertilizers promise to avert ecological disturbances. Here, we presented the sequence dataset of the endophytic bacterial community from the roots and stems of sunflower obtained from farmlands in Itsoseng and Lichtenburg, North West Province of South Africa, using 16S rRNA gene ampli ...
Helianthus annuus; Homoeosoma electellum; insect pests; trapping; Cochylis hospes; pheromone traps; population density; pest monitoring; pest identification; Texas; Manitoba; Midwestern United States; Great Plains region
... Siderophores are natural metal chelating agents that strongly control the biogeochemical metal cycles such as Fe in the environment. This article describes a new methodology to detect and quantify at the micromolar concentration the spatial distribution at millimeter scale of siderophores within the root’s system. The “universal” CAS assay originally designed for bacterial siderophores detection a ...
... Pseudomonas fluorescens is a siderophore producing bacteria that is expected to alter the mobility and bioavailability of Cu in vineyard soils due to its ability to produce pyoverdine under iron deficiency. In this study, we monitored the effect of this bacterial species, particularly the production of siderophore, on the mobility and bioavailability of copper (Cu) and other elements using a spati ...
... A passive light microscope system has been developed, capable of reconstructing an extended-focus 3-D cell-level image of chlorophyll fluorescence and ΦPSII of intact attached leaves using a limited number of focal plane images of chlorophyll fluorescence. Using this system, the relationships between the depth of the mesophyll cells in spongy tissue and the intensity of the chlorophyll fluorescenc ...
... For the sunflower fruits, hullability (H) is a technical parameter that defines how easily the hull can be broken and set apart from the kernel. H mainly depends on the morphology of the fruit and the biochemical properties of the hull. Finite element analysis (FEA) was used to model the mechanical behavior of the sunflower fruit hull after the fruit impact. A 3-D model of an entire fruit was desi ...
... The root holoparasitic weed sunflower broomrape (Orobanche cumana Wallr.) specifically infects sunflowers (Helianthus annuus L.) and causes significant loss of their quality and production. This experiment was designed to evaluate the ameliorative effects of 5-aminolevolinic acid (ALA) on susceptible sunflower (cv. TK0409) under O. cumana stress. Sunflower seeds were pretreated at five concentratio ...
... BACKGROUND: To reduce herbicide use by 75%, integrated use of sorghum and sunflower extracts each at 18 L ha⁻¹ combined with 1/4th (75% less) of label rates of four herbicides (mesosulfuron + idosulfuron, metribuzin, phenoxaprop-p-ethyl and isoproturon) were investigated for the management of wild oat and canary grass, the two pernicious weeds in wheat fields worldwide.RESULTS: The results reveale ...
... In this experiment sunflower oil, soybean oil and fish oil were incubated in rumen-fistulated adult ewes (n = 5) to study conjugated linoleic acid (CLA) production in the rumen. The individual oils were incubated in nylon bags in the rumen on perlite carrier (40% oil, 60% carrier) over a period of 2, 4, 6, 8, 10 and 12 h for all treatments. During the incubation of each oil primarily the formation ...
... Investigations conducted during last years showed serious violations of ecological equilibrium in many agricultural regions.Crops produced in these regions are commonly used as food and feed. It has been established that the content of heavy metals in the soils and agricultural crops grown nearby the metallurgical factories is much above the admissible concentration. Micro-particles of Pb, Cu, Zn ...
... Sunflower is a plant of the American continent, but now many wild species are spread in different part of the world. Along the coast of the Inhambane Bay, Mozambique, two sunflower species, H. argophyllus and H. debilis, both of Texas origin, grow far apart. However, in two sites on sandy soil they grow together and many plants have been recognized as hybrids, sharing morphological traits typical ...
... Field studies were conducted to determine the effect of early-season and early- plus late-season acetolactate synthase–resistant Helianthus annuus interference on Glycine max and H. annuus growth and yield at two sites in Missouri. Helianthus annuus densities of 3 plants m⁻² were established shortly after G. max emergence in all plots except the weed-free check. To study early-season interference, ...
... Study of inbreeding and heterosis in sunflower has been taking place for over 80 years now. Practical application of the phenomenon of heterosis in this species began after the discovery of a suitable source of cytoplasmic male sterility in 1969 and that of restorer genes. Many authors have reported significant manifestation of heterosis for seed yield and yield components as well. Also, the mode ...
... Hyperhydricity is a morphological and physiological disorder affecting plants regenerated in vitro. This malformation is associated with excessive hydration and abnormal shoot morphogenesis such as glassy water-soaked appearance of shoots. This undesirable phenomenon is a frequent problem in sunflower tissue culture systems and has been described by visual symptoms but there is no information on t ...
... Immature sunflower (Helianthus annuus L.) zygotic embryos belonging to R and B sunflower lines were treated with ultra sound and gamma rays before planting in an embryo culture medium. In those circumstances new mutant lines with the altered architecture, increased oil content, 1000-seed weight, number of seed per head, as well as seed yield were developed. Some mutant lines showed very good combi ...