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The role of rhizobacteria in rice plants: Growth and mitigation of toxicity

Journal of Integrative Agriculture 2018年第12期17卷 2636-2647页

作者： marcela c f rêgo Aline f cardoso Thayná da c ferreira Marta c c de filippi Telma f V Batista rafael G Viana Gisele B da Silva Plant Protection Laboratory Institute of Agrarian Sciences Federal Rural University of Amazon Phytopathology Laboratory Brazilian Enterprise for Agricultural Research-Rice and Beans

Allelopathic compounds reduce the growth and productivity of upland rice plants, especially in consecutive plantations. The rhizobacteria Pseudomonas fluorescens BrM-32111 and Burkholderia pyrrocinia BrM-32113 have been recorded as growth promoters in rice. This study was developed to understand the effect of the application of rhizobacteria on upland rice plants in consecutive plantations. Experiments were conducted in a completely randomized design with four replications of four treatments: rice seed inoculated with P. fluorescens BrM-32111, rice seed inoculated with B. pyrrocinia BrM-32113(both sown on soil with rice residue), non-inoculated plants sown on soil with rice residue(control with residue(Wr)), and non-inoculated plants on soil with no residue(Nr). roots and seedling growth were adversely affected by allelopathic compounds in control Wr plants. Plants inoculated with rhizobacteria P. fluorescens BrM-32111 or B. pyrrocinia BrM-32113 induced an increase of 88% in biomass, 3% in the leaf area, 40% in length, 67% in root biomass, 21% in chlorophyll a, 53% in chlorophyll(a+b), 50% in rate of carbon assimilation(A), 227% in A/rubisco carboxylation efficiency(ci) and 63% in water use efficiency(WUE) compared to control Wr plants. These results indicate that rhizobacteria P. fluorescens BrM-32111 and B. pyrrocinia BrM-32113 increase the tolerance of rice plants to stress from allelochemicals. There are possible practical agricultural applications of these results for mitigating the effects of environmental allelochemistry on upland rice.

关键词： allelopathy B.pyrrocinia P.fluorescens rhizobacteria rice

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Automated workflow for analyzing thermodynamic stability in polymorphic perovskite alloys

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npj computational Materials 2024年第1期10卷 1739-1752页

作者： Luis Octavio de Araujo celso r.c.rêgo Wolfgang Wenzel Maurício Jeomar Piotrowski Alexandre cavalheiro Dias Diego Guedes-Sobrinho Department of chemistry Federal University of ParanáCuritiba 81531-980 ParanáBrazil Institute of Nanotechnology Hermann-von-Helmholtz-Platz Karlsruhe Institute of TechnologyKarlsruheBaden-WürttembergGermany Department of Physics Federal University of PelotasPelotas 96010-900 Rio Grande do SulBrazil Institute of Physics and International center of Physics University of BrasíliaBrasília 70919-970 DFBrazil

In this first-principles investigation,we explore the polymorphic features of pseudo-cubic alloys,focusing on the impact of mixing organic and inorganic cations on their structural and electronic properties,configurat... 详细信息

关键词： stability. alloys thermodynamic

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Aboveground nutrient components of Eucalyptus camaldulensis and E. grandis in semiarid Brazil under the nature and the mycorrhizal inoculation conditions

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Journal of forestry research 2009年第1期20卷 15-22页

作者： marcela c. Pagano Antonio f. Bellote Maria r. Scotti Microorganism-Plant Interaction LaboratolT Institute of Biological Sciences Federal University of Minas Gerais Av. Antonio Carlos 6627 Pampulha CEP： 31270-901 Belo Horizonte MG Brazil Embrapa forestry Estrada da Ribeira km 111 Caixa Postal 319 - Colombo PR - 83411-000- Brazil.

A study was conducted to evaluate the aboveground biomass, nutrient content and the percentages of mycorrhizal colonization in Eucalyptus camaldulensis and Eucalyptus grand＆ plantations in the semiarid region （ 15° 09′ S 43° 49′ W） in the north of the State of Minas Gerais in Brazil. results show that the total above-ground biomass （dry matter） was 33.6 ***^-1 for E. camaldulensis and 53.1 Mg·ha^-1 for E. grandis. The biomass of the stem wood, leaves, branches, and stein bark for E. camaldulens accounted for 64.4%, 19.6%, 15.4%, and 0.6% of the total biomass, respectively （Table 2）; meanwhile a similar partition of the total above-ground biomass was also found for E. grand＆. The dry matter of leaves and branches of E. camaldulensis accounted for 35% of total biomass, and the contents of N, P, K, ca, Mg, and S in leaves and branches accounted for 15.5%, 0.7%, 12.3%, 22.6%, 1.9%, and 1.4% of those in total above-ground biomass, respectively. In the trunk （bark and wood）, nutrient accumulation in general was lower. Nutrient content of E. grand＆ presented little variation compared with that orE. camaJd^llensis. Wood localized in superior parts of trunk presented a higher concentration of P and bark contained significant amounts of nutrients, especially in E. grand＆. This indicated that leaving vegetal waste is of importance on the site in reducing the loss of tree productivity in this semi-arid region. The two species showed mycotrophy.

关键词： Eucalyptus biomass nutrient components semi-arid region mycorrhizal symbioses Brazil

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Two decades of continuous progresses and breakthroughs in the field of bioactive ceramics and glasses driven by cIcEcO-hub scientists

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Bioactive Materials 2024年第10期40卷 104-147页

作者： H.r.fernandes S.Kannan M.Alam G.E.Stan A.c.Popa r.Buczy′nski P.gołębiewski J.M.f.ferreira Department of Materials and ceramic Engineering CICECO-Aveiro Institute of MaterialsUniversity of AveiroSantiago University Campus3810-193AveiroPortugal centre for Nanoscience and Technology Pondicherry University605014PuducherryIndia National Institute of Materials Physics 077125MagureleRomaniau Lukasiewicz research Network-Institute of Microelectronics and Photonics Al.Lotnik′ow 32/4602-668WarsawPoland

Over the past two decades, the cIcEcO-hub scientists have devoted substantial efforts to advancing bioactiveinorganic materials based on calcium phosphates and alkali-free bioactive glasses. A key focus has been thedeliberate incorporation of therapeutic ions like Mg, Sr, Zn, Mn, or Ga to enhance osteointegration and vascularization,confer antioxidant properties, and impart antimicrobial effects, marking significant contributions tothe field of biomaterials and bone tissue engineering. Such an approach is expected to circumvent the uncertaintiesposed by methods relying on growth factors, such as bone morphogenetic proteins, parathyroidhormone, and platelet-rich plasma, along with their associated high costs and potential adverse side effects. Thiscomprehensive overview of cIcEcO-hub’s significant contributions to the forefront inorganic biomaterials acrossall research aspects and dimensionalities (powders, granules, thin films, bulk materials, and porous structures),follows a unified approach rooted in a cohesive conceptual framework, including synthesis, characterization, andtesting protocols. Tangible outcomes [injectable cements, durable implant coatings, and bone graft substitutes(scaffolds) featuring customized porous architectures for implant fixation, osteointegration, accelerated boneregeneration in critical-sized bone defects] were achieved. The manuscript showcases specific biofunctionalexamples of successful biomedical applications and effective translations to the market of bone grafts foradvanced therapies.

关键词： caP bioceramics Alkali-free bioactive glasses Bio-functional doping/substitution Osseointegration Antimicrobial efficiency

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Advantageous mechanochemical synthesis of copper(Ⅰ)selenide semiconductor,characterization,and properties

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frontiers of chemical Science and Engineering 2022年第3期16卷 433-442页

作者： Katarína Gáborová marcela Achimovičová Michal Hegedüs Vladimír Girman Mária Kaňuchová Erika Dutková Institute of Geotechnics Slovak Academy of SciencesKošice04001Slovakia Institute of Metallurgy Faculty of MaterialsMetallurgy and RecyclingTechnical UniversityKošice04201Slovakia Synthon s.r.o.Blansko67801Czech Republic faculty of Science Pavol JozefŠafárik UniversityKošice04154Slovakia Institute of Earth resources Faculty of MiningEcologyProcess Control and GeotechnologiesTechnical UniversityKošice04200Slovakia

copper(I)selenide-nanocrystalline semiconductor was synthesized via one-step mechanochemical synthesis after 5 min milling in a planetary ball *** kinetics of synthesis was followed by X-ray powder diffraction analysis and specific surface area measurements of milled 2cu/Se *** X-ray diffraction confirmed the orthorhombic crystal structure of cu_(2)Se with the crystallite size∼25 *** surface chemical structure was studied by X-ray photoelectron spectroscopy,whereby the binding energy of the cu 2p and Se 3d signals corresponded to cu^(+)and Se^(2−)oxidation *** electron microscopy revealed agglomerated nanocrystals and confirmed their orthorhombic structure,as *** optical properties were studied utilizing ultraviolet-visible spectroscopy and photoluminescence *** direct bandgap energy 3.7 eV indicated a blue-shift phenomenon due to the quantum size *** type of cu_(2)Se synthesis can be easily adapted to production dimensions using an industrial vibratory *** advantages of mechanochemical synthesis represent the potential for inexpensive,environmentally-friendly,and waste-free manufacturing of cu_(2)Se.

关键词： cu_(2)Se berzelianite nanocrystalline semiconductor mechanochemical synthesis planetary ball mill

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retention and redistribution of biological legacies generate resource sinks in silvopastoral systems of Arid chaco forests

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Ecological Processes 2019年第1期8卷 344-359页

作者： Laura cavallero marcela Ledesma Dardo r.López carlos A.carranza centro científico Tecnológico(ccT)cONIcET córdoba CórdobaArgentina Estación forestal INTA-Villa Dolores(EEA Manfredi) CórdobaArgentina

Background:forests are used for multiple purposes worldwide,which often include timber harvest,firewood extraction and livestock *** excessive pressure on multipurpose systems may decrease soil cover,promoting soil erosion and causing the loss of other resources,as litter and *** forestry practices can help to decrease or mitigate resource loss in the managed ***,retaining and redistributing biological legacies(***,branches,woody debris)at strategic locations can create sediment,litter,and seed-sinks in the silvopastoral *** addition,grazing management could increase or,even,decrease the success of this *** this study,we assessed the effect of branch barriers and grazing management on resource run-off/runon processes in silvopastoral systems of Arid chaco(córdoba,Argentina).To do this,a 2-ha area was divided in two paddocks that were randomly assigned to different grazing managements:winter *** *** randomly selected 22 water run-off paths in each paddock,and in the half of them,we build elongated branch *** each run-off path(with and without branch barriers),we recorded the amount of accumulated and lost sediment(during the rainy season),litter biomass,germinable seed bank,richness and cover of plant species,and richness and density of seedlings and saplings of woody ***:Branch barriers promoted sediment accumulation during the first and the second year of the study,depending on grazing *** temporal and spatial scale of the effect of the branch barriers also depended on grazing *** barriers also trapped litter and seeds,which may have increased the richness and density of seedlings and saplings of woody ***:By intercepting the dominant flow of erosive agents,branch barriers trapped sediment,litter,and propagules of different species.A greater amount of sediment and litter would have improved microsite quality,favouring seed germination an

关键词： Branch barriers Ecosystem degradation Multipurpose forests Soil erosion Winter grazing

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The best of both worlds:mastering nerve regeneration combining biological and nanotechnological tools

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Neural regeneration research 2023年第3期18卷 556-557页

作者： Paula A.Soto marcela B.fernández van raap c.Patricia Setton-Avruj Departamento de Química Biológica Cátedra de Química Biológica PatológicaUniversidad de Buenos AiresFacultad de Farmacia y BioquímicaInstituto de Química y Fisicoquímica Biológicas(IQUIFIB)Universidad de Buenos AiresBuenos AiresArgentina Departamento de física Universidad Nacional de La Plata(UNLP)Facultad de Ciencias ExactasLa PlataArgentinaLaboratorio de BiotecnologíaUniversidad ORT UruguayMontevideoUruguay

Over the last decade,remarkable developments in nanotechnology have powered medical research,unveiling new approaches for the solution of public health issues such as the treatment of traumatic peripheral neuropathies.

关键词： traumatic technological treatment

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Apolipoprotein E polymorphism influences orthotopic liver transplantation outcomes in patients with hepatitis c virus-induced liver cirrhosis

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World Journal of Gastroenterology 2021年第11期27卷 1064-1075页

作者： José carlos rodrigues Nascimento Lianna c Pereira Juliana Magalhães c rêgo ronaldo P Dias Paulo goberlânio B Silva Silvio Alencar c Sobrinho Gustavo r coelho Ivelise regina c Brasil Edmilson f Oliveira-filho James S Owen Pierluigi Toniutto reinaldo B Oriá Department of Anesthesia and Surgery Liver Transplantation Fortaleza General HospitalFortaleza 60150-160CEBrazil Laboratory of the Biology of Tissue Healing Ontogeny and NutritionDepartment of Morphology and Institute of BiomedicineSchool of MedicineFederal University of CearáFortaleza 60430-270CEBrazil Department of Dental clinic Federal University of CearáFortaleza 60430-270CEBrazil Department of Surgery Liver Transplant Unit of Federal University of CearáFortaleza 60430-270CEBrazil Transplantation Division Hospital Geral de FortalezaFortaleza 60175-742CEBrazil Institute of Virology CharitéUniversitätsmedizin BerlinBerlin 10117Germany UcL Medical School Royal Free CampusLondon NW32PFUnited Kingdom Department of Specialized Medicine Hepatology Liver Transplantation UnitAzienda Sanitaria Universitaria Integrata of UdineUdine I-33100Italy

BAcKGrOUND Hepatitis c virus(HcV)infection is responsible for a chronic liver inflammation,which may cause end-stage liver disease and hepatocellular *** E(protein:ApoE,gene:APOE),a key player in cholesterol metabolism,is mainly synthesized in the liver and APOE polymorphisms may influence HcV-induced liver *** To determine whether APOE alleles affect outcomes in HcV-infected patients with liver cirrhosis following orthotopic liver transplantation(OLT).METHODS This was a cohort study in which 179 patients,both genders and aged 34-70 years,were included before or after(up to 10 years follow-up)*** injury severity was assessed using different criteria,including METAVIr and models for endstage liver *** polymorphisms were analyzed by quantitative real-time polymerase chain *** The APOE3 allele was the most common(67.3%).In inflammation severity of biopsies from 89 OLT explants and 2 patients in pre-transplant,the degree of severe inflammation(A3f4,0.0%)was significantly less frequent than in patients with minimal and moderate degree of inflammation(≤A2f4,16.2%)P=0.048,in patients carrying the APOE4 allele when compared to *** addition,a significant difference was also found(≤A2f4,64.4%vs A3f4,0.0%;P=0.043)and(A1f4,57.4%vs A3f4,0.0%;P=0.024)in APOE4 patients when compared to APOE3 *** fibrosis degree of the liver graft in 8 of 91 patients and the lack of the E4 allele was associated with more moderate fibrosis(f2)(P=0.006).cONcLUSION Our results suggest that the E4 allele protects against progression of liver fibrosis and degree of inflammation in HcV-infected patients.

关键词： Apolipoprotein E Polymorphism Liver cirrhosis Hepatitis c virus Hepatocellular carcinoma Liver transplantation

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characteristics of Nb/Al superconducting tunnel junctions fabricated using ozone gas

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chinese Physics B 2015年第9期24卷 182-186页

作者： Masahiro Ukibe go fujii Masataka Ohkubo Nanoelectronics research Institute (nano) National Institute of Advanced Industrial Science and Technology (AIST)

To improve the energy resolution（？E） of Nb/Al superconducting tunnel junctions（STJs）, an ozone（O3） oxidation process has been developed to fabricate a thin defect-free tunnel barrier that simultaneously shows high critical current Jc〉 1000 A/cm^2 and high normalized dynamic resistance rDA 〉 100 MΩ·μm^2, where A is the size of the STJ. The 50-μm^2 STJs produced by O3 exposure of 0.26 Pa·min with an indirect spray of O3 gas, which is a much lower level of exposure than the O2 exposure used in a conventional O2 oxidation process, exhibit a maximum Jc= 800 A/cm^2 and a high rDA = 372 MΩ ·μm^2. The 100-pixel array of the 100-μm^2STJs produced using the same O3 oxidation conditions exhibits a constant leak current I leak= 14.9 ± 3.2 n A at a bias point around △ /e（where e is half the energy gap of an STJ）,and a high fabrication yield of 87%. Although the I leak values are slightly larger than those of STJs produced using the conventional O2 oxidation process, the STJ produced using O3 oxidation shows a ？E = 10 eV for the c-Kα line, which is the best value of our Nb/Al STJ x-ray detectors.

关键词： Nb/Al superconducting tunnel junctions high critical current density high energy resolution ozone

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Promising psyllium-based composite containing TiO2 nanoparticles as aspirin-carrier matrix

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Progress in Natural Science:Materials International 2014年第3期24卷 205-209页

作者： marcela-corina rosu Ioan Bratu National Institute for research and Development of Isotopic and Molecular Technologies

composite nanomaterials represent a new trend in the biomedical field. coupling inorganic/organic constituents with non-toxicity/biocompatibility properties leads to develop the new systems having special characteristics that can be used in various bio-applications. This paper describes the preparation and characterization of psyllium-based composites containing TiO2 nanoparticles in order to develop new therapeutic strategies for aspirin drug delivery. The structural characteristics of obtained materials were investigated by fTIr spectroscopy. The UV–vis spectrophotometric analysis was performed to evaluate the aspirin release behavior under different pH conditions at 37 1c. combining psyllium(as an excellent source of fiber) with TiO2 inorganic unit(as vehicle of aspirin) it was found that polymeric-TiO2networks have promising potential for controlled aspirin release as therapeutic agent.

关键词： Psyllium Titanium dioxide Aspirin In vitro release

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