Search

Copyright of Journal of Plant Production is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The present investigation was carried out at Sakha Agricultural Research Station, Kafr El-Sheikh and clayey saline soil at the experimental farm of El-Sirw Agricultural Research Station, Agriculture Research Center, Damietta governorate (31°14'N and 31°48'E) at the northern east of the Delta, Egypt during 2021 and 2022 seasons. Four Egyptian rice genotypes i.e. Giza178, Giza179, GZ9399-4-1-1-3-2-2 as a salt tolerant varieties and Sakha 106 as salt sensitive one were used as line and three rice genotypes; IRRI147 and IR65483 (salt tolerant varieties), Egyptian Jasmine ( salt moderately salinity tolerant variety) as tester were utilized. The parental varieties were crossed by using line & tester's analysis and twelve crosses were obtained. The F1 and their parents were grown and evaluated under saline soil. The studied characters were yield and yield attributes. The obtained results indicated that the parents, Giza178, Giza179 and IRRI147 were the best parents for general combining ability for studied traits under saline soil conditions. Meanwhile, the crosses, Giza179xIRRI147, Giza178xIRRI147 and Giza179xE.Jasmine were the best performing crosses and could be used under salinity condition as well as are considered as the most effective for getting promising lines. Assessing the genetic distance and linkages between seven different rice types were used to perform ISSR markers to identify genetic differences that could aid in the creation hybridization and selection of breeding program. [ABSTRACT FROM AUTHOR]

Interface engineering in complex oxide superlattices is a growing field, enabling manipulation of the exceptional properties of these materials, and also providing access to new phases and emergent physical phenomena. Here we demonstrate how interfacial interactions can induce a complex charge and spin structure in a bulk paramagnetic material. We investigate a superlattice (SLs) consisting of paramagnetic LaNiO3 (LNO) and highly spin-polarized ferromagnetic La2/3Ca1/3MnO3 (LCMO), grown on SrTiO3 (001) substrate. We observed emerging magnetism in LNO through an exchange bias mechanism at the interfaces in X-ray resonant magnetic reflectivity. We find non-symmetric interface induced magnetization profiles in LNO and LCMO which we relate to a periodic complex charge and spin superstructure. High resolution scanning transmission electron microscopy images reveal that the upper and lower interfaces exhibit no significant structural variations. The different long range magnetic order emerging in LNO layers demonstrates the enormous potential of interfacial reconstruction as a tool for tailored electronic properties. [ABSTRACT FROM AUTHOR]

Thin ferromagnetic La2/3Ca1/3MnO3 layers are deposited in between two layers of the high-Tc superconductor YBa2Cu3O7–δ (YBCO) by pulsed laser deposition. Using a tailored buffer layer allows the change of the orientation of the CuO2 planes inside the superconducting layers. With this technique it is possible to produce ferromagnetic barrier layers with high ferromagnetic transition temperatures that are thinner than the coherence length of the adjacent superconductors. Magnetization and electric transport measurements suggest that this geometry might be successful for the generation of ferromagnetic Josephson junctions in high temperature superconducting YBCO. [ABSTRACT FROM AUTHOR]

The atomic structures of SrTiO3 (STO)/LaNiO3 (LNO)/STO heterostructure interfaces were investigated by spherical aberration-corrected (CS) (scanning) transmission electron microscopy. Atomic displacement and lattice distortion measurements and electron energy loss spectroscopy (EELS) were used to quantitatively analyze the distortion of the interfacial octahedra and the bond length at the interfaces. Combined with high-resolution transmission electron microscopy (HRTEM) and scanning transmission electron microscopy analyses, two distinct interfacial atomic terminating layers are unambiguously determined. Ensuing quantitative HRTEM measurements revealed that the Ni-O bond length in the interfacial octahedral is elongated at the bottom interface (–NiO2-SrO–). Atomic displacement shows structural relaxation effects when crossing the interfaces and lattice distortions across the interface is more pronounced in LNO than in STO. The Ti/O atomic ratio, La and Ti relative atomic ratio as derived by EELS quantification indicate non-stoichiometric composition at the interfaces. Distinct fine structures of Ti-L2,3 edge and O-K edge at the bottom and top interfaces are observed. By comparison, we are able to estimate Ti valency at both interfaces. Combining the structural distortions and Ti valency, the polar discontinuity and charge transfer at the interfaces are discussed. [ABSTRACT FROM AUTHOR]

In this work, we comparatively investigated two MgB2 films: one (F1) was typically fabricated using the PLD method, while the other (F2) was fabricated using the same method but on top of a 100-nm-thick CrO2 layer. Both films had a thickness of 300 nm and were annealed ex situ at 700 °C for 30 min before being investigated under an external magnetic field of up to ± 7 T. The activation energy (Uo), upper critical field (HC2), irreversibility field (Hirr), magnetoresistance (MR), and I-V characteristics for the two films were studied in detail, and the results were compared with theoretical models. XRD analysis showed that both films are c-axis-oriented, while the RRR values for the films were found to be 1.6 and 1.89, respectively. Experimental data showed a broadening of the R-T transitions for an increasing magnetic field, with such broadening observed to be wider for F2 due to surface superconductivity. The activation energy under magnetic fields ranging from 0 to 7 T was calculated using our data and compared with a theoretical model. In both films, Uo followed a parabolic curve but was higher for F2 up to 6 T before sharply decreasing, while it continued to follow the same trend for F1 up to 7 T. The theoretical model was in good agreement with F1 for the full span of magnetic fields used. HC2 and Hirr were estimated and fitted using Ginzburg–Landau theory, but although the fitting was very good for F1, some modification in fitting parameters was required to obtain the same fitting for F2. Magnetoresistance and I-V characteristics confirm that the CrO2 layer in F2 leads to faster damage to the superconductivity property for high magnetic fields and temperatures. [ABSTRACT FROM AUTHOR]

A MgB2 film was deposited on an Al2O3 substrate (1102) using pulsed laser deposition (PLD) and in situ annealing at 700 °C for 30 min. The thickness of the film was 600 nm. The film was investigated using a PPMS system from Quantum Design. The film presented a critical temperature of 36 K, and XRD analysis showed that the film is preferentially c-oriented. Transport properties that were measured or estimated included the following: upper critical field, HC2, irreversibility field, Hirr, activation energy, Uo, magnetoresistance, MR and I-V characteristics. We completed investigations under different magnetic fields (0-7 T) applied perpendicular to the film at different temperatures. The results showed the remarkable dependence of both TC and ΔTC on the field. ΔTC increased continually from 1.6 K at no field up to 3.8 K for 7 T. The strong dependence of Uo on the magnetic field was observed, but Uo decreased faster for high fields from 451 meV at 0 T down to 210 meV at 7 T. The sharp decrease of Uo indicated that the weakening of the effective pinning forces is more rapid at higher fields. HC2 and Hirr were estimated using the Arrhenius law, and the HC2(0) value was 21 T. The current-voltage (I-V) characteristics measurements at different conditions showed hysteresis in the critical current, IC, which was temperature- and magnetic field-dependent. Although the critical current degraded linearly with increasing magnetic field, the hysteresis width, ΔI, tended to decrease in value more quickly at higher temperatures. Hysteresis has been attributed to weaker intergrain coupling and larger effective fields at the grain boundaries in the film. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agricultural Chemistry & Biotechnology is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agricultural Chemistry & Biotechnology is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agricultural Chemistry & Biotechnology is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)