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Post-fire recovery of Puya raimondii, vegetation and birds in the puna of Huascarán National Park, Perú

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Journal of Mountain Science 2024年第1期21卷 20-32页

作者： Mery L.SUNI Giovana P.VAdILLO César ARANA Enoc jara-PENA Letty SALINAS M.Estela PONCE Paul M.RAMSAY Plant Physiology Laboratory Faculty of Biological SciencesUniversidad Nacional Mayor de San MarcosLima 15081Peru Natural History Museum Universidad Nacional Mayor de San MarcosLima 15072Peru Applied Phytology Laboratory Faculty of Biological SciencesUniversidad Nacional Mayor de San MarcosLima 15081Peru department of Statistics Faculty of Mathematical SciencesUniversidad Nacional Mayor de San MarcosLima 15081Peru department of Chemical and Biological Sciences Universidad de las Américas PueblaSan Andrés Cholula CP Cholula CP 72810Mexico

A large fire of 233 ha in Huascarán National Park in Peru provided an opportunity to compare plant and bird responses in burned and nearby unburned zones of the puna. Heights and live diameters of flagship Puya raimondii rosettes(assigned to four broad developmental phases), plant communities(66 species in 24 families and nine growth forms) and bird communities(77 species in six trophic guilds) were monitored after the fire. Although no mortality was observed, Puya raimondii plants were affected by the fire, losing approximately 60% of their photosynthetic area across all developmental phases, but recovered quickly during the first two years after fire. The comparison of Puya rosette recovery after fire was complicated by the changes in live rosette diameter for unburned plants, which showed plasticity of photosynthetic area linked to seasonal and annual fluctuations in precipitation in this relatively dry environment(decreased by 26% for mature adult plants over the study period). Fire caused an immediate change in the density, biomass and composition of vegetation. Although the species present remained similar, their abundances changed significantly immediately after the fire, with notable reductions in dominant tussock grasses. This provided opportunities for other plants, resulting in higher postfire diversity of plant species, genera, families and growth forms. In turn, the changes in vegetation after fire affected the composition of birds according to their trophic guild. Granivores largely disappeared,generalists were mostly unaffected, and other guilds showed a more complex response. As the vegetation recovered, most displaced birds returned within approximately one year.

关键词： Burning Plant biomass Trophic guilds Andes Giant rosette plants

Mineralogical and petrographic analysis on the flake graphite ore from Saba Boru area in Ethiopia

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International Journal of Mining Science and Technology 2020年第5期30卷 715-721页

作者： Allah d.jara Girma Woldetinsae Amha Betemariam Jung Yong Kim School of Materials Science and Engineering Jimma Institute of TechnologyJimma UniversityJimmaEthiopia The Ministry of Mines Petroleum and Natural GasAddis AbabaEthiopia debre Berhan University Debre BerhanEthiopia School of Chemical Engineering Jimma Institute of TechnologyJimma UniversityJimmaEthiopia

The mineralogy and petrography of natural graphite in Saba Boru of Ethiopia indicate that there exists flake graphite with a slightly oval structured fine size according to our study on thin and polished ***,for estimating the carbon content in graphite,the ASTM-C561,the test method for ash in a graphite sample,was *** characterizing graphite,x-ray diffraction,x-ray fluorescence,inductively coupled plasma mass spectroscopy,and scanning electron microscopy were also *** analysis of ore samples determined that the average compositions are 63.35%SiO2,15.45%Al2O3,2.36%Fe2O3,2.07%K2O,less than1%others,and loss-on-ignition(LOI)in the range of^4.74%–37.42%.The total carbon content of graphitic ore ranged from 4.11%to 33.14%.Importantly,when graphite is concentrated through floatation,its average purity and recovery are 92.97%and 90.82%,***,once the graphite concentrates are treated with hydrofluoric acid,the average value attains a high grade of 96.48%***,the average ash content is 81.93%(pre-flotation)and 3.1%(post-flotation),***,after beneficiation,a silica is identified as a major gangue(85.88%),usable as a raw material for other purposes such as ***,these graphite-bearing rocks seem to be worth exploring for commercialization opportunities.

关键词： Mineralogy Petrography Flake graphite Flotation Saba Boru Ethiopia

Purification,application and current market trend of natural graphite:A review

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International Journal of Mining Science and Technology 2019年第5期29卷 671-689页

作者： Allah d.jara Amha Betemariam Girma Woldetinsae Jung Yong Kim School of Materials Science and Engineering Jimma Institute of TechnologyJimma UniversityJimma P.O.Box 378Ethiopia defense Engineering College Bishoftu P.O.Box 1041Ethiopia The Ministry of Mines Petroleum and Natural GasAddis Ababa P.O.Box 486Ethiopia School of Chemical Engineering Jimma Institute of TechnologyJimma UniversityJimma P.O.Box 378Ethiopia

Graphite has a stacked planar sp2-hybridized C6 ring structure,displaying a polymorphism with rhombohedral,hexagonal,and *** on its structure-property relationship,it affords a variety of technologically innovative applications or performances in industries,such as lithium-ion batteries,fuel cells,two dimensional graphene,water purification,electronics,fiber optics,spintronics,refractories,electrical products,electric vehicles,*** monetary value of graphite depends largely on carbon content and flake ***,the physical separation of graphite from its ore body is known to be very expensive,energy intensive and ***,this study extensively describes a current purification method for producing high-quality graphite material with impurities reaching about 10–100 mg/kg,attracting a lot of end *** also describes the potential applications of graphite materials and identifies the future scope of a new market,depending on material ***,the current and future graphite-mining countries are investigated in details.

关键词： Graphite Purification Graphene Lithium-ion battery Market Technology

Is a 7-day Helicobater pylori treatment enough for eradication and inactivation of gastric inflammatory activity?

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World Journal of Gastroenterology 2008年第18期14卷 2838-2843页

作者： Carlos Robles-jara Carlos Robles-Medranda Manuel Moncayo Byron Landivar Johnny Parrales Gastroenterology division Instituto Ecuatoriano de Enfermedades Digestivas y Pélvicas (IECED) Portoviejo 1301266 Ecuador Gastroenterology division Instituto Ecuatoriano de Enfermedades Digestivas y Pélvicas (IECED) Portoviejo 1301266 Ecuador Gastroenterology Division Hpital Edouard Herriot Lyon 69003 France Gastroenterology division Instituto Ecuatoriano del Seguro Social Portoviejo 1301266 Ecuador Epidemiology division Hospital Oncológico Julio Villacreses Colmont Sociedad de Lucha contra el Cancer (SOLCA) or Registro Nacional de Tumores Portoviejo 1301266 Ecuador Laboratorio de Histopatologia (LABOPAT) Portoviejo 1301266 Ecuador

AIM: To compare the efficacy of a 7-d vs 10-d triple therapy regarding H pylori eradication, endoscopic findings and histological gastric inflammatory inactivation in the Ecuadorian population. METHOdS: 136 patients with dyspepsia and H pylori infection were randomized in 2 groups (68 per group): group 1, 7-d therapy; group 2, 10-d therapy. Both groups received the same medication and daily dosage: omeprazole 20 mg bid, clarithromycin 500 mg bid and amoxicillin 1 g bid. Endoscopy was performed for histological assessment and H pylori infection status before and 8 wk after treatment. RESULTS: H pylori was eradicated in 68% of group 1 vs 83.8% of group 2 for the intention-to-treat analysis (ITT) (P = 0.03; OR = 2.48; 95% CI, 1.1-5.8), and 68% in group 1 vs 88% in group 2 for the per-protocol analysis (PP) (P = 0.008; OR = 3.66; 95% CI, 1.4-10). Endoscopic gastric mucosa normalization was observed in 56.9% in group 1 vs 61.2% in group 2 for ITT, with similar results for the PP, the difference being statistically not significant. The rate of inflammatory inactivation was 69% in group 1 vs 88.7% in group 2 for ITT (P = 0.007; OR = 3.00; 95% CI, 1.2-7.5), and 69% in group 1 vs96% in group 2 for PP (P = 0.0002; OR = 7.25; 95% CI, 2-26). CONCLUSION: In this Ecuadorian population, the 10-d therapy was more effective than the 7-d therapy for H pylori eradication as well as for gastric mucosa inflammatory inactivation.

关键词： Helicobater pylori treatment Helicobater pylon infection Gastric inflammatory inactivation Triple therapy eradication Randomized study

Novel fibrin-fibronectin matrix accelerates mice skin wound healing

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Bioactive Materials 2020年第4期5卷 949-962页

作者： Carlos Poblete jara Ou Wang Thais Paulino do Prado Ayman Ismail Frank Marco Fabian Han Li Licio A.Velloso Mark A.Carlson William Burgess Yuguo Lei William H.Velander Eliana P.Araújo Nursing School University of CampinasCampinasSPBrazil Laboratory of Cell Signaling University of CampinasCampinasSPBrazil department of Chemical and Biomolecular Engineering University of NebraskaLincolnNEUSA Biomedical Engineering Program University of NebraskaLincolnNEUSA School of Biological Science University of NebraskaLincolnNEUSA department of Surgery University of Nebraska Medical Center and the VA Nebraska-Western Iowa Health Care SystemUSA Mary and dick Holland Regenerative Medicine Program University of Nebraska Medical CenterOmahaNEUSA Fred&Pamela Buffett Cancer Center University of Nebraska Medical CenterOmahaNEUSA

Plasma fibrinogen(F1)and fibronectin(pFN)polymerize to form a fibrin clot that is both a hemostatic and provisional matrix for wound *** 90%of plasma F1 has a homodimeric pair ofγchains(γγF1),and 10%has a heterodimeric pair ofγand more acidicγ′chains(γγ′F1).We have synthesized a novel fibrin matrix exclusively from a 1:1(molar ratio)complex ofγγ′F1 and pFN in the presence of highly active thrombin and recombinant Factor XIII(rFXIIIa).In this matrix,the fibrin nanofibers were decorated with pFN nanoclusters(termedγγ′F1:pFN fibrin).In contrast,fibrin made from 1:1 mixture ofγγF1 and pFN formed a sporadic distribution of“pFN droplets”(termedγγF1+pFN fibrin).Theγγ′F1:pFN fibrin enhanced the adhesion of primary human umbilical vein endothelium cells(HUVECs)relative to theγγF1+FN *** dimensional(3d)culturing showed that theγγ′F1:pFN complex fibrin matrix enhanced the proliferation of both HUVECs and primary human *** in the 3dγγ′F1:pFN fibrin exhibited a starkly enhanced vascular morphogenesis while an apoptotic growth profile was observed in theγγF1+pFN *** toγγF1+pFN fibrin,mouse dermal wounds that were sealed byγγ′F1:pFN fibrin exhibited accelerated and enhanced *** study suggests that a 3d pFN presentation on a fibrin matrix promotes wound healing.

关键词： Fibrin Fibronectin Nanoclusters Wound healing

Intravitreal Bevacizumab for the Treatment of Chronic or Recurrent Central Serous Chorioretinopathy

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Open Journal of Ophthalmology 2014年第3期4卷 57-64页

作者： Mitzy E. Torres Soriano Gerardo García Aguirre Maximiliano Gordon Angelozzi Veronica Kon jara Jans Fromow Guerra Michael d. Ober Hugo Quiroz Mercado Centro de la Visión Gordon Manavella Rosario Argentina department of Ophthalmology University of North Carolina Chapel Hill USA Ophthalmology Service at denver Health Medical Center Denver USA Retina Consultants of Michigan Southfield USA Retina department Asociación para evitar la Ceguera Hos-pital Dr. Luis Sanchez Bulnes Mexico City Mexico Unidad Oftalmológica “dr Torres López” Centro Médico Cagua Cagua Venezuela

Background: We report the use of intravitreal bevacizumab as an option for the treatment of chronic or recurrent central serous chorioretinopathy (CSC). Methods: Eight eyes with chronic or recurrent CSC received intravitreal bevacizumab (1.25 mg/0.05 cc) and underwent best corrected visual acuity (VA), optical coherent tomography (OCT), fluorescein angiography (FA) and indocyanine green angiography (ICG) before, and one, three and six months after treatment. Results: All patients showed improvement in visual acuity, fluorescein angiographic leakage, choroidal hyperpermeability and reduced or resolved neurosensory detachment following treatment. Two patients require a second dose of intravitreal bevacizumab. Conclusions: Intravitreal injection of bevacizumab was associated with visual improvement and reduced neurosensory detachment without adverse events in patients with chronic or recurrent CSC. Although these results are promising, further investigations would be helpful to understand this therapy for patients with CSC.

关键词： Central Serous Chorioretinopathy Intravitreal Bevacizumab Retinal Pigment Epithelium detachment

Phase Ⅱ trial of CdK4/6 inhibitor palbociclib in advanced sarcoma based on mRNA expression of CdK4/CdKN2A

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Signal Transduction and Targeted Therapy 2023年第11期8卷 5518-5527页

作者： Javier Martin-Broto Jeronimo Martinez-Garcia david SMoura Andres Redondo Antonio Gutierrez Antonio Lopez-Pousa Javier Martinez-Trufero Isabel Sevilla Roberto diaz-Beveridge Maria Pilar Solis-Hernandez Amancio Carnero Marco Perez david Marcilla Jesus Garcia-Foncillas Pablo Romero Javier Fernandez-jara daniel Lopez-Lopez Ivan Arribas Nadia Hindi Health Research Institute-Fundación Jiménez díaz University Hospital Universidad Autónoma de Madrid(IIS-FJDUAM)28040MadridSpain Medical Oncology department Fundación Jimenez Diaz University Hospital28040MadridSpain General de Villalba University Hospital 28400MadridSpain Medical Oncology department University Hospital Virgen de la Arrixaca30120MurciaSpain department of Medical Oncology Hospital Universitario La Paz-IdiPAZP.Castellana26128046MadridSpain Hematology department University Hospital Son Espases07120MallorcaSpain Medical Oncology department Sant Pau Hospital08025BarcelonaSpain Medical Oncology department University Hospital Miguel Servet50009ZaragozaSpain Investigación Clínica y Traslacional en Cáncer/Instituto de Investigaciones Biomédicas de Malaga(IBIMA)/Hospitales Universitarios Regional y Virgen de la Victoria de Malaga MalagaSpain Medical Oncology department Hospital Universitari i Politècnic La Fe46026ValenciaSpain Medical Oncology department Central University Hospital of Asturias33011OviedoSpain Instituto de Biomedicina de Sevilla(IBiS HUVRCSICUS)41013SevillaSpain Pathology department Virgen del Rocio University Hospital41013SevillaSpain Radiology department Fundación Jimenez Diaz University Hospital28040MadridSpain Computational Medicine Platform Fundación progreso y salud(FPS)Hospital Virgen del Rocío41013SevilleSpain Bioinformatics in Rare diseases(BiER).Centro de Investigación Biomédica en Red de Enfermedades Raras(CIBERER) FPSHospital Virgen del RocioSevillaSpain Universitat de València-ERI-CES 46010ValenciaSpain

Cyclin-dependent kinases 4 and 6(CdK4/6)inhibitors demonstrated activity in terms of progression-free survival(PFS)in advanced dedifferentiated liposarcoma(dd-LPS),a sarcoma with CdK4 ***4 overexpression is by far more common than amplification in sarcomas and it might be a rational target for CdK *** investigators of this study found that CdK4 overexpression,while not of CdKN2A,was the most consistent predictive factor for palbociclib efficacy in *** adult-type soft-tissue sarcoma,excluding dd-LPS,or bone sarcoma patients,progressing after at least one systemic line,whose tumors overexpressed CdK4,but not CdKN2A at baseline biopsy,were accrued in this single-arm phase II trial(EudraCT number:2016-004039-19).With the main endpoint of a 6-month PFS rate,40%was considered promising in this *** was administered orally at 125 mg/day for 21 days in 28-day cycles.A total of 214 patients with 236 CdK4/CdKN2A determinations were assessed for prescreening,archival material(141),and screening,baseline biopsy(95).There were 28(29%)with favorable mRNA profiles from 95 screened patients at *** 23 enrolled patients,21 evaluable,the 6-month PFS rate was 29%(95%CI 9–48),and there were 6 patients out of 21 with a PFS longer than 6 *** median PFS and overall survival were 4.2(95%CI 3.6–4.8)and 12(95%CI 8.7–15.4)months,*** research showed a significant correlation between CdK4 mRNA and protein *** was active in a variety of sarcoma subtypes,selected by CdK4/CdKN2A,and deserves further investigation in the sarcoma context.

关键词： CdKN2A sarcoma CdK4

device-associated infection rates, mortality, length of stay and bacterial resistance in intensive care units in Ecuador: International Nosocomial Infection Control Consortium's findings

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World Journal of Biological Chemistry 2017年第1期8卷 95-101页

作者： Estuardo Salgado Yepez Maria M Bovera Victor d Rosenthal Hugo A González Flores Leonardo Pazmino Francisco Valencia Nelly Alquinga Vanessa Ramirez Edgar jara Miguel Lascano Veronica delgado Cristian Cevallos Gasdali Santacruz Cristian Pelaéz Celso Zaruma diego Barahona Pinto Clínica la Merced Hospital de los Valles International Nosocomial Infection Control Consortium

AIM To report the results of the International Nosocomial Infection Control Consortium(INICC) study conducted in Quito, *** A device-associated healthcare-acquired infection(dAHAI) prospective surveillance study conducted from October 2013 to January 2015 in 2 adult intensive care units(ICUs) from 2 hospitals using the United States Centers for disease Control/National Healthcare Safety Network(CdC/NHSN) definitions and INICC methods. RESULTS We followed 776 ICU patients for 4818 bed-days. The central line-associated bloodstream infection(CLABSI) rate was 6.5 per 1000 central line(CL)-days, the ventilator-associated pneumonia(VAP) rate was 44.3 per 1000 mechanical ventilator(MV)-days, and the catheterassociated urinary tract infection(CAUTI) rate was 5.7 per 1000 urinary catheter(UC)-days. CLABSI and CAUTI rates in our ICUs were similar to INICC rates [4.9(CLABSI) and 5.3(CAUTI)] and higher than NHSN rates [0.8(CLABSI) and 1.3(CAUTI)]- although device use ratios for CL and UC were higher than INICC and CdC/NSHN's ratios. By contrast, despite the VAP rate was higher than INICC(16.5) and NHSN's rates(1.1), MV dUR was lower in our ICUs. Resistance of A. baumannii to imipenem and meropenem was 75.0%, and of Pseudomonas aeruginosa to ciprofloxacin and piperacillin-tazobactam was higher than 72.7%, all them higher than CdC/NHSN rates. Excess length of stay was 7.4 d for patients with CLABSI, 4.8 for patients with VAP and 9.2 for patients CAUTI. Excess crude mortality in ICUs was 30.9% for CLABSI, 14.5% for VAP and 17.6% for CAUTI. CONCLUSION dA-HAI rates in our ICUs from Ecuador are higher than United States CdC/NSHN rates and similar to INICC international rates.

关键词： Ventilator-associated pneumonia Catheter-associated urinary tract infection Healthcare-associated infection Antibiotic resistance developing countries Intensive care unit Surveillance Central line-associated bloodstream infections Hospital infection

Probe manipulators for Wendelstein 7-X and their interaction with the magnetic topology

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Plasma Science and Technology 2018年第5期20卷 6-17页

作者： M RACK d HOSCHEN d REITER B UNTERBERG J W COENEN S BREZINSEK O NEUBAUER S BOZHENKOV G CZYMEK Y LIANG M HUBENY Ch LINSMEIER the Wendelstein 7-X Team Forschungszentrum Julich GmbH Institut für Energie- und Klimaforschung-Plasmaphysik Partner of the Trilateral Euregio Cluster (TEC) D-52425 Julich Germany jara-HPC D-52425 Julich Germany Max-Planck-Institut für Plasmaphysik D-17491 Greifswald/D-85748 Garching Germany

Probe manipulators are a versatile addition to typical plasma edge *** with material samples they allow for detailed investigation of plasma–wall interaction processes,such as material erosion,deposition or impurity transport *** combined with electrical probes,a study of scrape-off layer and plasma edge density,temperature and flow profiles as well as magnetic topologies is possible.A mid-plane manipulator is already in operation on Wendelstein 7-X.A system in the divertor region is currently under *** the present paper we discuss the critical issue of heat and power loads,power redistribution and experimental access to the complex magnetic topology of Wendelstein *** the aforementioned aspects are of relevance for the design and operation of a probe manipulator in a device like Wendelstein？7-X.A focus is put on the topological region that is accessible for the different coil current configurations at Wendelstein 7-X and the power load on the manipulator with respect to the resulting different magnetic *** analysis of power loads on plasma-facing components is performed using a numerical tracer particle diffusion tool provided via the Wendelstein 7-X Webservices.

关键词： stellarators Wendelstein 7-X manipulator divertor power load