Exploring potato seed research: a bibliometric approach towards sustainable food security

IntroductionPotato is considered to be complete food that will not only ensure food security but also alleviate poverty. Seed production of potato requires specific temperatures and conditions. In response to the growing emphasis on sustainable production, there has been an increasing focus on research on tuber seed production.MethodsIn our study, we have employed bibliometric analysis to investigate the trends in potato seed research and assess its correlation with sustainable development. Tabular analysis and network analysis are employed in the study to understand the prominent authors and institutions and research trends across time. For this purpose, Biblioshiny and Vosviewer software were used. The steps of bibliometric analysis were used, which included data retrieval from Dimensions software. Owing to its limitations, a major analysis was conducted without affecting the results.Result and discussionIt was found from the analysis that it was SDG 2 that was mostly linked with the theme of potato seed production. The results depicted an increasing trend of publications and citations. Co-authorship analysis of authors showed high linkage among groups of authors that formed clusters while other authors remained disconnected. Among countries United States, China and the United Kingdom had a higher impact on publications and citations. Our analysis showed that there is still scope for collaboration among countries as there is no evidence of multidisciplinary interlinkages. By understanding the current research landscape, identifying influential works and authors, and uncovering collaboration patterns, we can pave the way for future advancements in potato seed production. Ultimately, this research contributes to achieving sustainable agriculture and ensuring food security for future generations

Safety and immunogenicity of <i style="">Brucella</i> <i style="">abortus </i>strain RB51 vaccine in cross bred cattle calves in India

239-242Safety and immunogenicity of Brucella abortus RB51 vaccine has been evaluated in an organised dairy farm in India. All the cattle (n=29) vaccinated with strain RB51 ‘responded’ to the vaccine as demonstrated by iELISA using acetone killed strain RB51 antigen. The percentage responders at day 35, 60 and 90 post vaccination were 100%, 95% and 20%, respectively. Strain RB51 was able to elicit a good IFN- response from vaccinated animals. The post-vaccination time point analysis indicated that the cumulative IFN- response of whole blood from vaccinates stimulated with heat killed RB51 antigen was elicited in 80% of calves at 60 days post vaccination. Absence of strain RB51 in the secretions and excretion and lack of local or systemic reaction indicated the safety of the vaccine

Highly oriented GaN films grown on ZnO buffer layer over quartz substrates by reactive sputtering of GaAs target

Polycrystalline GaN films were deposited on quartz and ZnO buffer layers over quartz by reactive sputtering of a GaAs target in 100% nitrogen at 550 °C and 700 °C. Micro-structural investigations of the films were carried out using high resolution X-ray diffraction, atomic force microscopy and Raman spectroscopy. GaN films deposited on ZnO buffer layers exhibit strongly preferred (0002) orientation of crystallites. In particular, the film deposited at 700 °C on ZnO buffer layer over amorphous quartz substrate showed large crystallite size, both along and perpendicular to growth direction, strong and nearly complete c-axis orientation of crystallites with tilt of ~ 2.5° and low value of micro-strain ~ 2 × 10− 3. The significant improvement in crystallinity and orientation of crystallites in the GaN film is attributed to the presence of the ZnO buffer layer on quartz substrate and its small lattice mismatch (1.8%) with GaN.© Elsevie

Influence of growth temperature on laser molecular beam epitaxy and properties of GaN layers grown on c-plane sapphire

We have investigated the influence of growth temperature on the in-plane strain, structural, optical and mechanical properties of heteroepitaxially grown GaN layers on sapphire (0001) substrate by laser molecular beam epitaxy (LMBE) technique in the temperature range 500-700 degrees C. The GaN epitaxial layers are found to have a large in-plane compressive stress of about 1 GPa for low growth temperatures but the strain drastically reduced in the layer grown at 700 degrees C. The nature of the in-plane strain has been analyzed using high resolution x-ray diffraction, atomic force microscopy (AFM), Raman spectroscopy and photoluminescence (PL) measurements. From AFM, a change in GaN growth mode from grain to island is observed at the high growth temperature above 600 degrees C. A blue shift of 20-30 meV in near band edge PL emission line has been noticed for the GaN layers containing the large in-plane strain. These observations indicate that the in-plane strain in the GaN layers is dominated by a biaxial strain. Using nanoindentation, it is found that the indentation hardness and Young's modulus of the GaN layers increases with increasing growth temperature. The results disclose the critical role of growth mode in determining the in-plane strain and mechanical properties of the GaN layers grown by LMBE technique

Ion irradiation-induced, localized sp(2) to sp(3) hybridized carbon transformation in walls of multiwalled carbon nanotubes

In this report, ion irradiation-induced localized sp(2) to sp(3) hybridized carbon transformation in multiwalled carbon nanotubes (MWCNTs) was observed after irradiating MWCNTs with high-energy Au+8 ions (100 MeV). The used MWCNTs were grown using cobaltocene and benzene as catalyst and carbon source, respectively'by the thermal CVD technique and consist of both unfilled and Co-filled tubes. Prior to irradiation, the MWCNT sample was characterized using scanning electron microscope and micro-Raman and photoluminescence spectrometers. The effect of ion fluence on MWCNT walls and transformation of sp(2) to sp(3) sites was analyzed by Raman spectroscopy, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy. We found that as the fluence increased, the localized transformation from sp(2) to sp(3) sites occurred in the walls of MWCNTs, which was evident by the emergence of peak at approximately 1543 cm(-1) associated with the G peak in tetrahedral amorphous carbon (ta-C) and the vanishing of 2D band (2700 cm(-1)). Furthermore, we observed broadening in D and G, with slight shift in their positions and consistent decrease in 2D band intensity, as fluence increased

Fe3C-filled carbon nanotubes: permanent cylindrical nanomagnets possessing exotic magnetic properties

The present study aims to deduce the confinement effect on the magnetic properties of iron carbide (Fe3C) nanorods filled inside carbon nanotubes (CNTs), and to document any structural phase transitions that can be induced by compressive/tensile stress generated within the nanorod. Enhancement in the magnetic properties of the nanorods is attributed to tensile stress as well as to compression, present in the radial direction and along the nanotube axis, respectively. Finally, the growth of permanent cylindrical nanomagnets has been optimized by applying a field gradient. Besides presenting the growth model of in situ filling, we have also proposed the mechanism of magnetization of the nanotubes. Magnetization along the tube axis has been probed by confirming the pole formation. Fe3C has been selected because of its ease of formation, low TC and incompressibility

Observation of Skyrmions at Room Temperature in Co2FeAl Heusler Alloy Ultrathin Film Heterostructures

Magnetic skyrmions are topological spin-textures having immense potential for energy efficient spintronic devices. Here, we report the observation of stable skyrmions in unpatterned Ta/Co2FeAl(CFA)/MgO thin film heterostructures at room temperature in remnant state employing magnetic force microscopy. It is shown that these skyrmions consisting of ultrathin ferromagnetic CFA Heusler alloy result from strong interfacial Dzyaloshinskii-Moriya interaction (i-DMI) as evidenced by Brillouin light scattering measurements, in agreement with the results of micromagnetic simulations. We also emphasize on room temperature observation of multiple skyrmions which can be stabilized for suitable combinations of CFA layer thickness, perpendicular magnetic anisotropy, and i-DMI. These results provide a significant step towards designing of room temperature spintronic devices based on skyrmions in full Heusler alloy based thin films