cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.11804190.v1
title: Tests to evaluate the physiological potential of Mombasa grass seeds

description: ABSTRACT Identifying fast and efficient tests to evaluate the vigor of forage grass seed lots is desirable in the quality control programs of the companies in this sector. Thus, the objective was to evaluate the efficiency of vigor tests on the physiological quality of seeds of Panicum maximum, cv. Mombasa, for the differentiation of lots and prediction of seedling emergence in the field. Nineteen seed lots were subjected to evaluations of moisture content, germination, first count, germination speed index, seedling emergence in sand, first count of seedling emergence in sand, seedling root and shoot lengths, seedling emergence in the field and computerized analysis of seedling images obtained through SVIS® software. The experimental design was completely randomized for the tests performed in the laboratory and randomized blocks for the emergence test in the field. The data were subjected to analysis of variance and the means were compared by Scott-Knott test at 5% probability level. Cluster analysis of seed lots and principal component analysis were performed. The uniformity index, evaluated by image analysis and by the root length test, is efficient in evaluating the physiological potential of seeds of Panicum maximum, cv. Mombasa, providing information similar to those obtained with the test of seedling emergence in the field.
DOI: 10.6084/m9.figshare.11804181
title: Application of superphosphate complexed with humic acid in an area of sugarcane

description: ABSTRACT In tropical soils, the efficiency of phosphorus (P) fertilization is low, due to P adsorption on the surface of the clay. Superphosphate complexed with humic acid (SSP+HA) is presented as an alternative for improving P use efficiency and crop yields. The aim of this study was to investigate SSP+HA performance in sugarcane production including increases in plant dry matter (DM) and P content. The experiment was conducted with two sources of P (simple superphosphate - SSP, SSP+HA) and five doses (0, 45, 90, 135 and 180 kg ha-1 P2O5). The dose of 135 kg ha-1 P2O5 was used to explain the residual effect of P, collecting soil samples from the plant cane and first ratoon. Stalk, top and root samples were collected to determine DM and P content; both variables were used to calculate the P assimilation efficiency (PaE). Results showed that the application of SSP increased the DM and P content of the plants, with superior performance compared to SSP+HA. PaE was greater under SSP+HA, indicating that P was metabolized more efficiently; however this did not reflect in an increase in DM. AThe P rates increased the sugarcane yield in cane plant, but there was no effect of P applied in the first ratoon due to the residual effect of P applied in planting. SSP presented superior performance compared to SSP + SH in sugarcane planting. Further research is needed to better demonstrate the effect of SSP+HA on the absorption and translocation of P.
DOI: 10.6084/m9.figshare.11804181.v1
title: Application of superphosphate complexed with humic acid in an area of sugarcane

description: ABSTRACT In tropical soils, the efficiency of phosphorus (P) fertilization is low, due to P adsorption on the surface of the clay. Superphosphate complexed with humic acid (SSP+HA) is presented as an alternative for improving P use efficiency and crop yields. The aim of this study was to investigate SSP+HA performance in sugarcane production including increases in plant dry matter (DM) and P content. The experiment was conducted with two sources of P (simple superphosphate - SSP, SSP+HA) and five doses (0, 45, 90, 135 and 180 kg ha-1 P2O5). The dose of 135 kg ha-1 P2O5 was used to explain the residual effect of P, collecting soil samples from the plant cane and first ratoon. Stalk, top and root samples were collected to determine DM and P content; both variables were used to calculate the P assimilation efficiency (PaE). Results showed that the application of SSP increased the DM and P content of the plants, with superior performance compared to SSP+HA. PaE was greater under SSP+HA, indicating that P was metabolized more efficiently; however this did not reflect in an increase in DM. AThe P rates increased the sugarcane yield in cane plant, but there was no effect of P applied in the first ratoon due to the residual effect of P applied in planting. SSP presented superior performance compared to SSP + SH in sugarcane planting. Further research is needed to better demonstrate the effect of SSP+HA on the absorption and translocation of P.
DOI: 10.6084/m9.figshare.11869404
title: Irrigation of radish cultivars in the region of Viçosa, Minas Gerais, Brazil

description: ABSTRACT The region of Viçosa in Brazil stands out for vegetable production. For success in this activity, the correct choice of cultivar with the correctly applied irrigation are necessary. As such, the aim of this study was to evaluate the agronomic performance of radish cultivars submitted to different irrigation depths. The radish crop was grown in a protected environment over three cycles, for periods of 38 to 40 days. The experimental design was of randomised complete blocks in split plots with five replications, comprising five irrigation depths (50, 75, 100, 125 and 150% of crop evapotranspiration-ETc) in the plots, with three radish cultivars in the subplots. (Hybrid no 25 - Sakata, Crunchy Royale - Sakata and Vip Crimson - Feltrin). A drip irrigation system was used, with the ETc obtained by means of the GESAI method. The following parameters were evaluated: root depth, plant water potential, leaf temperature, leaf weight, root diameter and length, number and weight of commercial and non-commercial roots, and water use efficiency. Since the experimental soil presented high water retention and availability, greater than 1.8 mm cm-1, an irrigation depth of 50% ETc is recommended, provided that the soil is at field capacity at the start of the cycle. When considering productivity and quality, the Crunchy Royale cultivar is recommended when cultivating the radish in Viçosa, Brazil.
DOI: 10.6084/m9.figshare.11869404.v1
title: Irrigation of radish cultivars in the region of Viçosa, Minas Gerais, Brazil

description: ABSTRACT The region of Viçosa in Brazil stands out for vegetable production. For success in this activity, the correct choice of cultivar with the correctly applied irrigation are necessary. As such, the aim of this study was to evaluate the agronomic performance of radish cultivars submitted to different irrigation depths. The radish crop was grown in a protected environment over three cycles, for periods of 38 to 40 days. The experimental design was of randomised complete blocks in split plots with five replications, comprising five irrigation depths (50, 75, 100, 125 and 150% of crop evapotranspiration-ETc) in the plots, with three radish cultivars in the subplots. (Hybrid no 25 - Sakata, Crunchy Royale - Sakata and Vip Crimson - Feltrin). A drip irrigation system was used, with the ETc obtained by means of the GESAI method. The following parameters were evaluated: root depth, plant water potential, leaf temperature, leaf weight, root diameter and length, number and weight of commercial and non-commercial roots, and water use efficiency. Since the experimental soil presented high water retention and availability, greater than 1.8 mm cm-1, an irrigation depth of 50% ETc is recommended, provided that the soil is at field capacity at the start of the cycle. When considering productivity and quality, the Crunchy Royale cultivar is recommended when cultivating the radish in Viçosa, Brazil.
DOI: 10.6084/m9.figshare.11869389
title: Water stress on germination and vigor of ‘mofumbo’ (Combretum leprosum Mart.) seeds at different temperatures

description: ABSTRACT Combretum leprosum Mart., commonly known as ‘mofumbo’, is used for medicinal purposes, recovery of degraded areas and apiculture. The objective of this study was to evaluate the effect of water stress on the germination and vigor of C. leprosum seeds as function of different temperatures. To compose the treatments, the substrate used was paper roll moistened with polyethylene glycol solutions (PEG 6000), at the following levels of osmotic potential: 0.0; -0.1; -0.2; -0.2; -0.4; and -0.5 MPa, and placed in chamber at constant temperatures of 25, 30 and 35 and alternating temperature of 20-30 °C, forming a 6 x 4 factorial. The seeds were submitted to the following evaluations: germination percentage, germination speed index, root length, shoot length, root dry matter, shoot dry matter. There was a significant interaction for all variables, with a negative effect as the osmotic potentials decreased. Thus, C. leprosum showed high sensitivity to low osmotic potentials, showing a steeper decrease from the potential of -0.2 MPa for all evaluated temperatures. Initial germination and development of C. leprosum seedlings was negatively affected by low osmotic potentials, with a tolerance limit of -0.4 MPa. Temperatures of 25 and 35 °C accentuate the negative effect of the low osmotic potential of water on the germination and early development of C. leprosum seedlings.
DOI: 10.6084/m9.figshare.11869389.v1
title: Water stress on germination and vigor of ‘mofumbo’ (Combretum leprosum Mart.) seeds at different temperatures

description: ABSTRACT Combretum leprosum Mart., commonly known as ‘mofumbo’, is used for medicinal purposes, recovery of degraded areas and apiculture. The objective of this study was to evaluate the effect of water stress on the germination and vigor of C. leprosum seeds as function of different temperatures. To compose the treatments, the substrate used was paper roll moistened with polyethylene glycol solutions (PEG 6000), at the following levels of osmotic potential: 0.0; -0.1; -0.2; -0.2; -0.4; and -0.5 MPa, and placed in chamber at constant temperatures of 25, 30 and 35 and alternating temperature of 20-30 °C, forming a 6 x 4 factorial. The seeds were submitted to the following evaluations: germination percentage, germination speed index, root length, shoot length, root dry matter, shoot dry matter. There was a significant interaction for all variables, with a negative effect as the osmotic potentials decreased. Thus, C. leprosum showed high sensitivity to low osmotic potentials, showing a steeper decrease from the potential of -0.2 MPa for all evaluated temperatures. Initial germination and development of C. leprosum seedlings was negatively affected by low osmotic potentials, with a tolerance limit of -0.4 MPa. Temperatures of 25 and 35 °C accentuate the negative effect of the low osmotic potential of water on the germination and early development of C. leprosum seedlings.
DOI: 10.15151/esrf-es-771432122
title: Munich Crystallography BAG

description: The diverse groups of the Munich Crystallography BAG study a far range of subjects, reaching from structural aspects of fundamental cellular processes - such as RNA processing, protein folding and degradation, DNA repair, chromatin remodelling, enzymes - to the design of foldamers. The research groups are located at the LMU and TUM universities in Munich, at the Max-Planck-Institute of Biochemistry, Martinsried, and the Helmholtz Center, Neuherberg. Out-groups are located at the universities in Darmstadt and Ulm, Germany. The research groups use X-ray crystallography, single-particle cryo-EM, SAXS, NMR and HDX and XL-MS mass-spectrometry for structural studies.
DOI: 10.6084/m9.figshare.11997651.v1
title: Univariate and multivariate nonlinear models in productive traits of the sunn hemp

description: ABSTRACT Multivariate analysis helps to understand the relationships between dependent variables; this methodology has great potential in several areas of knowledge. The aim of this study was to adjust and compare the univariate and multivariate Gompertz and Logistic nonlinear models to describe the productive traits of sunn hemp (Crotalaria juncea L.). Two uniformity trials were performed, and the following productive traits were analyzed in 376 sunn hemp plants along 94 days of observations (four plants per day): the fresh mass of leaves (FML), the fresh mass of stem (FMS), and the fresh mass of the aerial parts (FMAP). The Gompertz and Logistic univariate models were adjusted for each productive trait. To adjust the multivariate models, the errors covariance matrix was calculated. The matrix (Cholesky factor) was obtained for each trait, and the multivariate Gompertz (GG) and Logistic (LL) nonlinear models were generated, together with the combination of both models (GL and LG). To define the best model, the residual standard deviation (RSD), the determination coefficient (R2), the Akaike information criterion (AIC), the mean absolute deviation (MAD), and the measures of intrinsic nonlinearity (INL) and parametric nonlinearity (PNL) were calculated. The nonlinear multivariate model LL was adequate and achieved satisfactory results to describe the productive traits of sunn hemp.
DOI: 10.15151/esrf-es-834350470
title: SXDM of AlGaN

description: SXDM experiment probing three non-collinear reflections around an isolated threading screw dislocation in an AlGaN single crystal, identified by markers deposited on the surface. Experiment to benchmark the strain resolution of SXDM, using an object generating known stress field (the dislocation).
DOI: 10.6084/m9.figshare.11997651
title: Univariate and multivariate nonlinear models in productive traits of the sunn hemp

description: ABSTRACT Multivariate analysis helps to understand the relationships between dependent variables; this methodology has great potential in several areas of knowledge. The aim of this study was to adjust and compare the univariate and multivariate Gompertz and Logistic nonlinear models to describe the productive traits of sunn hemp (Crotalaria juncea L.). Two uniformity trials were performed, and the following productive traits were analyzed in 376 sunn hemp plants along 94 days of observations (four plants per day): the fresh mass of leaves (FML), the fresh mass of stem (FMS), and the fresh mass of the aerial parts (FMAP). The Gompertz and Logistic univariate models were adjusted for each productive trait. To adjust the multivariate models, the errors covariance matrix was calculated. The matrix (Cholesky factor) was obtained for each trait, and the multivariate Gompertz (GG) and Logistic (LL) nonlinear models were generated, together with the combination of both models (GL and LG). To define the best model, the residual standard deviation (RSD), the determination coefficient (R2), the Akaike information criterion (AIC), the mean absolute deviation (MAD), and the measures of intrinsic nonlinearity (INL) and parametric nonlinearity (PNL) were calculated. The nonlinear multivariate model LL was adequate and achieved satisfactory results to describe the productive traits of sunn hemp.
DOI: 10.15151/esrf-es-838192868
title: RIXS study of spin waves in Nickel metal

description: Repeat of previous experiment on nickel to confirm results and improve data set.
DOI: 10.15151/esrf-es-835612921
title: scanning diffraction on boroslicate glass

description: scanning diffraction on boroslicate glass
DOI: 10.15151/esrf-es-835613087
title: scanning microdiffraction on soft matters

description: scanning microdiffraction on soft matters
DOI: 10.6084/m9.figshare.11997750
title: Physiological quality evaluation of Piptadenia stipulacea (Benth.) Ducke seeds by tetrazolium test

description: ABSTRACT The tetrazolium test is one of the promising alternatives to determine the viability of dormant, recalcitrant and slow-germinating seeds. The objective of this study was to adapt the tetrazolium test methodology to estimate the viability and vigor of Piptadenia stipulacea (Benth.) Ducke seeds. For this, a sample of seeds was classified into three sublots using round sieves, corresponding to six, five and four millimeters in diameter, respectively. Moisture content, imbibition curve, germination, emergence, germination and emergence speed indices, mean germination time and seedling emergence were initially evaluated. The second stage was conducted using a completely randomized experimental design, in 3 x 9 factorial scheme, corresponding to three sublots and nine combinations between concentrations and time of immersion in tetrazolium salt (0.05%/2 h; 0.05%/4 h; 0.05%/6 h; 0.075%/2 h; 0.075%/4 h; 0.075%/6 h; 0.1%/2 h; 0.1%/4 h; 0.1%/6 h), totaling twenty-seven treatments with four replicates of 25 seeds, evaluated separately at 35 and 40 °C. For each treatment, the seeds were divided into four classes: viable and vigorous seeds (class I), viable and non-vigorous (class II), unviable (class III) and dead (class IV). The period of 8 h of pre-imbibition and 4 h of staining in tetrazolium solution at 0.075%, under 35 or 40 °C, is adequate to estimate the viability and vigor of P. stipulacea seeds.
DOI: 10.15151/esrf-es-841612889
title: Scanning polymer spherulites grown under controlled temperature. Testing lipid membrane samples

description: Scanning polymer spherulites grown under controlled temperature (PU and PCL bottle-brushes samples on SiN membranes). Making preliminary test experiment on new lipid membrane samples, freshly prepared at IBS
DOI: 10.6084/m9.figshare.11997750.v1
title: Physiological quality evaluation of Piptadenia stipulacea (Benth.) Ducke seeds by tetrazolium test

description: ABSTRACT The tetrazolium test is one of the promising alternatives to determine the viability of dormant, recalcitrant and slow-germinating seeds. The objective of this study was to adapt the tetrazolium test methodology to estimate the viability and vigor of Piptadenia stipulacea (Benth.) Ducke seeds. For this, a sample of seeds was classified into three sublots using round sieves, corresponding to six, five and four millimeters in diameter, respectively. Moisture content, imbibition curve, germination, emergence, germination and emergence speed indices, mean germination time and seedling emergence were initially evaluated. The second stage was conducted using a completely randomized experimental design, in 3 x 9 factorial scheme, corresponding to three sublots and nine combinations between concentrations and time of immersion in tetrazolium salt (0.05%/2 h; 0.05%/4 h; 0.05%/6 h; 0.075%/2 h; 0.075%/4 h; 0.075%/6 h; 0.1%/2 h; 0.1%/4 h; 0.1%/6 h), totaling twenty-seven treatments with four replicates of 25 seeds, evaluated separately at 35 and 40 °C. For each treatment, the seeds were divided into four classes: viable and vigorous seeds (class I), viable and non-vigorous (class II), unviable (class III) and dead (class IV). The period of 8 h of pre-imbibition and 4 h of staining in tetrazolium solution at 0.075%, under 35 or 40 °C, is adequate to estimate the viability and vigor of P. stipulacea seeds.
DOI: 10.15151/esrf-es-790324648
title: Laue micro-diffraction of Pt particles during electrochemical cycling

description: Platinum group metal (PGM) nanocrystals (NCs) and their alloys are frequently used as catalysts in many relevant (electro)-chemical processes. In this proposal, we intend to follow the formation and propagation of structural defects as well as strain changes of multiple single Pt NCs under realistic electrochemical reactions (e.g. oxygen reduction reaction – ORR), these two parameters being descriptors of the ORR kinetics. This approach will complement the study of single-crystal samples performed by coherent Bragg diffraction by providing a more statistical approach.
DOI: 10.15151/esrf-es-790326172
title: Molecular basis of length-dependent activation in cardiac muscle

description: The efficiency of the heart as a pump depends on an auto-regulatory mechanism, called length-dependent activation (LDA), that potentiates the strength of contraction in response to an increase in ventricular filling. Despite decades of investigation, the molecular basis of LDA in cardiac muscle is still unclear. Here we propose to use X-ray diffraction at the upgraded beamline ID02 to investigate the structural changes in the myofilaments induced by stretch in relaxed and partially calcium-activated demembranated cardiac trabeculae in near-physiological conditions. Because the disruption of LDA is a common pathogenic mechanism underlying cardiac dysfunction, the results of this research will provide new targets and assays for the development of new pharmacological approaches to treat heart failure in cardiac diseases.
DOI: 10.15151/esrf-es-790327124
title: Understanding degradation in a Fe-based fuel cell catalyst from 3D morphology and elemental maps by correlative X-ray holographic and fluore

description: In this study, we aim to apply a correlative combination of holographic tomography, x-ray fluorescence computed tomography and 2D-XRF with a nanoprobe to obtain key insights into durability issues of Fe-based fuel cell catalyst materials. Fe-leaching from the C-encapsulated iron nanoparticles present in the initial catalyst as well as concomitant-poisoning of the catalyst layer's H+-conducting ionomer with leached Fe-ions are both possible mechanisms to which instability issues are ascribed. The unique combination of x-ray techniques above, correlatively applied to a pristine and degraded sample allow us to resolve structural integrity and material distribution (holography) of both catalysts together with elemental distributions mapped on top of the morphology (fluorescence). The results, in combination, will provide insights on both possible degradation mechanisms.
DOI: 10.15151/esrf-es-790328283
title: Senescence and iron release from plastids: ways of iron remodelling

description: Iron (Fe) is essential cofactor in various physiological processes such as the operation of the photosynthetic functions. In Planta, Fe content of leaves also serves as Fe source during senescence processes. Retranslocation of Fe is connected to the alteration in the regulation of chloroplast Fe homeostasis. Our data (Pham et al, 2020, Sági-Kazár et al, under peer-review) indicate that regulation of the chloroplast Fe homeostasis and senescence processes are in a close interaction. The understanding they way and reasons of Fe remodelling may provide a basis for the development of better foliar Fe application and biofortification techniques. With the help of single point μXANES we could determine any possible chemical modifications in the Fe content of chloroplasts as well as that of mesophyll cells in the areas of interest. Data are essential for the proper interpretation of ou molecular biological information.
DOI: 10.15151/esrf-es-790328971
title: X-ray Elastography of an osteoarthris mouse model

description: Osteoarticular diseases are the most prevalent chronic pains and long-term disabilities with hundreds of millions of people affected worldwide. The mechanical properties of bone and cartilage play a crucial role in osteoarthritis but for the moment they can only be assessed essentially by invasive techniques such as Atomic Force Microscopy or Optical Coherence tomography. Elastography is a non-invasive medical imaging modality that maps the elastic properties and stiffness of soft and mixed tissues. Unfortunately, the elastography techniques employ so far UltraSound or Magnetic Resonnance Imaging which have both weak or no signal for cartilage and bone. This proposal aims at applying a new imaging modality, namely X-ray elastography, to measure elastic properties of bone, cartilage, and menisci in entire mice joints. This imaging experiment will be performed on postmortem extracted knees of a severe osteoarthritis mouse model and control mice knees.