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Effect of Zn binding to phytate and humic substances on its uptake by wheat(Triticum durum l.)as affected by carbonates and Fe oxides

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Pedosphere 2022年第6期32卷 823-832页

作者： Ana M.GARCÍA-lÓpez Ramiro RECENA Antonio DElGADO Department of Agronomy ETSIAUniversity of SevilleSeville 41013(Spain)

Although complexation with soil organic matter may improve zinc(Zn)bioavailability to plants,the effect of Zn sorbent surface on the use of complexed Zn by plants remains *** objective of this research was to elucidate how Zn complexation with humic substances(HS)and phytate affects the uptake of Zn by wheat plants depending on the main sorbent surface in growth media,i.e.,carbonates and Fe *** this end,two pot experiments were performed,one using Fe oxide-coated siliceous as the siliceous growth medium sand and the other using a mixture of calcareous sand and siliceous sand as the calcareous growth *** experiment involved three Zn sources,Zn-HS complex,Zn phytate,and ZnSO_(4).All sources were applied with surface irrigation at two Zn rates(0.25 and 2 mg kg^(-1) growth medium).The Zn-HS complex significantly increased Zn uptake by plants in both media,relative to the other two Zn sources,but no significant difference was observed between Zn phytate and ZnSO_(4).In the calcareous medium,Zn-HS complex and Zn phytate resulted in significantly higher dry biomass yields of wheat than ZnSO_(4).In the siliceous medium,spike and shoot dry biomass yields with Zn-HS complex at the low rate and Zn phytate at both rates were not significantly different from those with ZnSO_(4) at the high *** harvest,approximately 50%of the Zn applied as Zn-HS complex remained extractable by diethylenetriaminepentaacetic acid(DTPA),while this proportion was less than 20%for the other Zn ***,Zn-HS complex and Zn phytate are sources of available Zn for plants,and they are more effective than ZnSO_(4) in increasing plant growth,particularly when carbonates are the main Zn sorbent surface.

关键词： calcareous growth medium micronutrient organic matter organic phosphorus Zn availability Zn deficiency Zn sorbent surface Zn source

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liver histological changes and lipid peroxidation in the amphibian Ambystoma mexicanum induced by sediment elutriates from the lake Xochimilco

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Journal of Environmental Sciences 2016年第8期28卷 156-164页

作者： Esperanza Ortiz-Ordonez Eugenia lópez-lópez Jacinto Elías Sedeno-Díaz Esther Uría Ignacio Andrés Morales María Estela Pérez Mineko Shibayama Instituto Politécnico Nacional Depto.de Formación Básica e InterdisciplinariaCICS-USTAv.de los Maestros s/n.Col.Sto Instituto Politécnico Nacional Laboratorio de Evaluación de la Salud de Ecosistemas AcuáticosENCBProl.de Carpio y Plan de Ayala s/n.Col.Sto Instituto Politécnico Nacional Coordinación Politécnica para la SustentabilidadEdificio de la Biblioteca Nacional3er PisoAv.Instituto Politécnico Nacional s/nesq.Wilfrido MassieuCol Instituto Politécnico Nacional Laboratorio de HistologíaENCBProl.de Carpio y Plan de Ayala s/n.Col.Sto Unidad de Servicio Académico Acuario BiologíaFacultad de CienciasUniversidad Autónoma de MéxicoCiudad Universitaria laboratorio de Infectómica Centro de Investigación y de Estudios Avanzados del IPNAv.Instituto Politécnico Nacional

lacustrine sediments accumulate pollutants that input from the lake watershed and can be released to the water column by sediment resuspension; thus, pollutants can change their bioavailability and exert adverse effects to aquatic biota. Shallow-urban lakes are particularly susceptible to receive pollutants from urban discharges and sediment resuspension. lake Xochimilco, in Mexico City, an urban-shallow lake, faces multiple problems： urban sprawl, overexploitation of aquifers, drying of springs, discharge of wastewater from treatment plants, and sediment resuspension. The aquatic biota living in this ecosystem is continuously exposed to the release of pollutants from the sediments. We assessed the risk that pollutants released from sediments from lake Xochimilco, Touristic（TZ） and Agriculture zone（AZ）, can exert on a native amphibian species of the lake（Ambystoma mexicanum） through exposure bioassays to sediment elutriates. We evaluate alterations in the amphibian by three approaches： biochemical（level of lipid peroxidation,lPO）, cellular（ultrastructure） and the liver histology of A. mexicanum and we compare them with a batch control. Additionally, we assessed heavy metals（Pb, Cd and Hg） in *** from TZ showed the highest concentrations of the metals assessed. Organisms exposed to sediment elutriates from either study sites showed higher lPO values than control organisms（p 〈 0.05）. Organisms exposed to elutriates from the TZ showed the most conspicuous damages： hepatic vasodilation of sinusoids, capillaries with erythrocytes,leukocyte infiltration and cytoplasmic vacuolation in hepatocytes. The biological responses assessed reflected the risk that faces A. mexicanum when is exposed for prolonged periods to sediment resuspension in lake Xochimilco.

关键词： Elutriates Amphibian liver Histological alterations Ultrastructure Oxidative stress Metals Urban lake

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Patterns of trends in niveograph characteristics across the western United States from snow telemetry data

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Frontiers of Earth Science 2020年第2期14卷 315-325页

作者： S.R.FASSNACHT J.I.lÓpez-MORENO ESS-Watershed Science Colorado State UniversityFort CollinsCO 80523-1472USA Cooperative Institute for Research in the Atmosphere Colorado State UniversityFort CollinsCO 80523-1375USA Natural Resources Ecology laboratory Colorado State UniversityFort CollinsCO 80523-1499USA Instituto Pirenaico de Ecología CSICCampus de Aula Dei 50080Spain

The snowpack is changing across the globe,as the climate warms and *** used daily snow water equivalent(SWE)niveograph(time series of SWE)data from 458 snow telemetry(SNOTEl)stations for the period 1982 through *** indices based on amount,timing,time length,and rates were used to describe the annual temporal evolution in SWE accumulation and *** trends in these annual indices were computed over the time period for each station using the Theil-Sen *** trends were then clustered into four groups to determine the spatial pattern of SWE *** and precipitation data were extracted from the PRISM data set,due to the shorter time period of temperature measurement at the SNOTEl *** show that SNOTEl stations can be clustered in four clusters according to the observed trends in snow *** 1 stations are mostly located in the Eastern-and South-eastern most parts of the study area and they exhibit a generalized decrease in the indices related with peak SWE and snow *** stations recorded a negative trend in precipitation and an increase in *** 4 that is mostly restricted to the North and North-west of the study area shows an almost opposite pattern to cluster 1,due to months with positive trends and a more moderate increase of *** grouped in clusters 2 and 3 appear mixed with clusters 1 and 4,in general they show very little trends in the snow indices.

关键词： snow water equivalent cluster analysis SNOTEl

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Neuroinflammation in glaucoma：soluble tumor necrosis factor alpha and the connection with excitotoxic damage

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Neural Regeneration Research 2016年第3期11卷 424-426页

作者： Jorge l.Cueva Vargas adriana Di Polo Department of Neuroscience and Centre de recherche du Centrehospitalier de l'Universite de Montreal (CRCHUM) University of Montreal Montreal Quebec H3R2T6 Canada

Inflammation is a complex and highly regulated response that occurs early after infection or *** process is initiated by cells of the immune system to re-establish tissue *** the injury is persistent,however,chronic i... 详细信息

关键词： glaucoma homeostasis inflammation initiated persistent RGCs permeability synaptic glutamate excitatory

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Autologous bone marrow mononuclear cells as neuroprotective treatment of amyotrophic lateral sclerosis

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Neural Regeneration Research 2016年第4期11卷 568-569页

作者： Francisco José Ruiz-lópez Miguel Blanquer pneumology service virgen de la arrixaca hospitalmurcia universityimibMurciaSpain hematopoietic progenitors transplant and cell therapy unit virgen de la arrixaca hospitalmurcia universityimibMurciaSpain

Amyothrophic lateral sclerosis（AlS）is a disorder characterized by the progressive degeneration of motoneurons and subsequent weakness of the skeletal *** insufficiency is the most common cause of death for these pat... 详细信息

关键词： bone GDNF

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New aspects in celiac disease

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World Journal of Gastroenterology 2007年第8期13卷 1156-1161页

作者： MI Torres MA lópez Casado A Ríos Department of Experimental Biology University of JaénJaén 23071Spain Department of Gastroenterology Pediatrics. Hospital Virgen de las Nieves Granada Department Cell Biology. University of Granada Granada

Celiac disease (CD) is a common autoimmune disorder characterized by an immune response to ingested gluten and has a strong HlA association with HlA- DQ2 and HlA-DQ8 molecules, but human HlA-DQ risk factors do not explain the entire genetic susceptibility to gluten intolerance. CD is caused by the lack of immune tolerance (oral tolerance) to wheat gluten. In this sense, the expression of soluble HlA-G in CD is of special interest because the molecule plays an important role in the induction of immune tolerance. The enhanced expression of soluble HlA-G found in CD may be part of a mechanism to restore the gluten intolerance. In this editorial, we review recent progress in understanding CD in relation to its prevalence, diagnosis and possible mechanisms of pathogenesis.

关键词： Celiac disease Oral tolerance Il-10 TGF-beta Gluten intolerance

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Manifestations of gastrointestinal plasmablastic lymphoma: A case series with literature review

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World Journal of Gastroenterology 2014年第33期20卷 11894-11903页

作者： lynette luria Johnny Nguyen Jun Zhou Michael Jaglal Jane l Messina Domenico Coppola lubomir Sokol ling Zhang Department of Pathology University of South Florida Morsani College of Medicine Tampa FL 33612 United States. Department of Pathology Wayne State University School of Medicine Detroit MI 48202 United States Department of Malignant Hematology H. Lee Moffitt Cancer Center and Research Institute Tampa FL 33612 United States Department of Surgical Pathology H. Lee Moffitt Cancer Center and Research Institute Tampa FL 33612 United States Department of Hematopathology and laboratory Medicine H. Lee Moffitt Cancer Center and Research Institute Tampa FL 33612 United States

Plasmablastic lymphoma (PBl) rarely occurs in the gastrointestinal (GI) tract with limited studies reported. We reviewed the clinical histories and pathology of four patients with GI PBl at our institute and similar case reports published in peer-reviewed journals. In our first case, a 40 year-old human immunodeficiency virus positive male presented with a hemorrhoid-like sensation, and was diagnosed with PBl via biopsy of a rectal mass. The second case involves a 65 year-old healthy male with bloody diarrhea who was found to have PBl in a resected sigmoid mass. The third patient was a 41 year-old male with a history of Crohn’s disease who presented with abdominal pain, diarrhea, and weight loss. A small intestinal mass (PBl) was removed. The fourth patient was a 65-year-old male who was found PBl after surgical resection of bowel for his florid Crohn’s disease. He later developed secondary acute myeloid leukemia. Clinical outcome was very poor in 3 out of 4 patients as reported in the literature. One patient survived chemotherapy followed by autologous transplant. The prototypical clinical presentation and variations of PBl can help create a more comprehensive differential diagnosis for GI tumors and establish an appropriate therapeutic guideline.

关键词： Plasmablastic lymphoma Undifferentiated carcinoma Non-Hodgkin lymphoma Diverse clinical manifestation and treatment

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Trabectedin therapy as an emerging treatment strategy for recurrent platinum-sensitive ovarian cancer

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Chinese Journal of Cancer 2015年第1期34卷 41-49页

作者： José Antonio lópez-Guerrero Ignacio Romero Andrés Poveda laboratory of Molecular Biology Fundación Instituto Valenciano de Oncología Clinical Area of Gynecological Cancer Fundación Instituto Valenciano de Oncología

Epithelial ovarian cancer(OC) is a common gynecologic malignancy in women. The standard treatment for OC is maximal cytoreductive surgical debulking followed by platinum-based chemotherapy. Despite the high response rate to primary therapy, approximately 85% of patients will develop recurrent ovarian cancer(ROC). This review identifies the clinical use of trabectedin in the treatment algorithm for ROC, with specific emphasis on platinum-sensitive ROC, for which trabectedin in combination with pegylated liposomal doxorubicin has been approved as a treatment protocol. The main mechanisms of action of trabectedin at the cellular level and in the tumor microenvironment is also discussed as bases for identifying biomarkers for selecting patients who may largely benefit from trabectedin-based therapies.

关键词：治疗方案卵巢癌敏感复发铂疗法恶性肿瘤聚乙二醇化

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Data-driven models for ground and excited states for Single Atoms on Ceria

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npj Computational Materials 2022年第1期8卷 1636-1643页

作者： Julian Geiger Albert Sabadell-Rendón Nathan Daelman Núria lópez Institute of Chemical Research of Catalonia(ICIQ) The Barcelona Institute of Science and Technology(BIST)Avinguda Països Catalans 1643007TarragonaSpain Universitat Rovira i Virgili Avinguda Catalunya3543002TarragonaSpain

Ceria-based single-atom catalysts present complex electronic structures due to the dynamic electron transfer between the metal atoms and the semiconductor oxide *** these materials implies retrieving all states in these electronic ensembles,which can be limiting if done via density functional ***,we propose a data-driven approach to obtain a parsimonious model identifying the appearance of dynamic charge transfer for the single atoms(SAs).We first constructed a database of(701)electronic configurations for the group 9–11 metals on CeO_(2)(100).Feature Selection based on predictive Elastic Net and Random Forest models highlights eight fundamental variables:atomic number,ionization potential,size,and metal coordination,metal–oxygen bond strengths,surface strain,and Coulomb *** these variables a Bayesian algorithm yields an expression for the adsorption energies of SAs in ground and low-lying excited *** work paves the way towards understanding electronic structure complexity in metal/oxide interfaces.

关键词： theory excited states

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On the non-evolution of the dependence of black hole masses on bolometric luminosities for QSOs

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Research in Astronomy and Astrophysics 2012年第3期12卷 249-259页

作者： Martín lópez-Corredoira Carlos M. Gutirrez Instituto de Astrofísica de Canarias Departamento de Astrofísica Universidad de La Laguna

There are extremely luminous quasi stellar objects （QSOs） at high redshift which are absent at low redshift. The lower luminosities at low redshifts can be understood as the external manifestation of either a lower Eddington ratio or a lower mass. To distinguish between both effects, we determine the possible dependence of masses and Eddington ratios of QSOs with a fixed luminosity as a function of redshifts; this avoids the Malmquist bias or any other selection effect. For the masses and Eddington ratios derived for a sample of QSOs in the Sloan Digital Sky Survey, we model their evolution by a double linear fit separating the dependence on redshifts and luminosities. The validity of the fits and possible systematic effects were tested by the use of different estimators of masses or bolometric luminosities, and possible intergalactic extinction effects. The results do not show any significant evolution of black hole masses or Eddington ratios for equal luminosity QSOs. The black hole mass only depends on the bolometric luminosity without significant dependence on the redshift as （M BH/10 9 M ）≈ 3.4 （l bol/10 47 erg s-1）0.65 on average for z ≤ 5. This must not be confused with the possible evolution in the formation of black holes in QSOs. The variations of the environment might influence the formation of the black holes but not their subsequent accretion. It also leaves a question to be solved： Why are there not QSOs with very high mass at low redshift？ A brief discussion of the possible reasons for this is tentatively pointed out.

关键词： accretion—methods: statistical—quasars: general

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