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Reproductive patterns in Araucaria araucana forests in the Andean range, Chile

Ecological processes 2024年第1期13卷 252-261页

作者： Sergio Donoso Karen pe?a-rojas Claudia Espinoza Carolain Badaracco Rómulo Santelices-Moya Antonio Cabrera-Ariza Mediterranean Forests Laboratory Faculty of Forestry and Nature Conservation Centro Secano Faculty of Agricultural and Forestry Sciences Universidad Católica del Maule Maule Advanced Studies Research Center Vice-Rector's Office for Research and Postgraduate Studies Catholic University of Maule

Background Araucaria araucana is a mast species that presents a high variability in annual cone production. Researchers have recorded synchronization events in cone production in different populations, which allows the seed production to be concentrated, reducing the percentage of seeds consumed by different animal *** We sampled three populations located in the Andes Mountains, Araucanía Region, Chile. In 2004 we began the collection of data on cone production, for which we installed permanent plots（1200 m2each） at each location. We identified and labeled each female tree in each plot to monitor its cone production. In 2012 we selected a total of 30 trees near the plots to evaluate the number of seeds per cone. In each February from 2012 to 2014 we selected two mature cones and covered them with a porous mesh for subsequent collection and storage in March. At the beginning of June, we counted and weighed the seeds, determining the average weight, the number of seeds per cone, the germination capacity（GC）, and the germination speed（GS）.Results Cone production was synchronous across the three locations. We observed significant differences among the locations and years evaluated. The cones had fewer seeds in 2013（high production） compared to those in 2012（low production）, but their weights were similar. In 2014 the cones produced smaller seeds in fewer quantities. The difference between the years 2013 and 2014 resulted from the high-energy expenditure in 2013. Regarding GC and GS, there were significant differences among the three locations（GC: F = 45.41, p p produced in a given year. These annual fluctuations in seed production are determining factors in the population dynamics of forest species. Our results allow a better understanding of the reproductive phenology of A. araucana and could hel

关键词： Seed weight Germination potential Masting species Sustainable use Dioecious species

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Intraductal papillary neoplasm of the bile ducts: A case report and literature review

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World Journal of Gastroenterology 2015年第43期21卷 12498-12504页

作者： Yaohong Tan Clara Milikowski Yanelba Toribio Adam Singer Claudia p rojas Monica T Garcia-Buitrago Department of pathology Jackson Memorial HospitalUniversity of Miami Miller School of Medicine Department of Radiology Jackson Memorial HospitalUniversity of Miami Miller School of Medicine

Intraductal papillary neoplasm of the bile duct(IpNB) is a rare bile duct neoplasm mostly found in far eastern nations where hepatolithiasis and clonorchiasis infections are endemic. In western countries,it is very rare and the etiology is unknown. In this article,we report the first IpNB patient we encountered in our clinic and a literature review. The patient is a 38-yearold female with a history of choledocholithiasis who presented with obstructive jaundice. She was found to have a papillary mass at the junction of the right hepatic duct and common hepatic duct with six masses in the liver parenchyma. The immunophenotypic and histologic features of the tumor are consistent with IpNB,gastric subtype. The patient had a partial hepatectomy and has been receiving palliative chemotherapy. In a search of pub Med database,we collected 354 IpNB patients reported in 22 articles. In these patients,52.8% were from Japan and 27.7% were from western countries including the United States(11.0%). The age of the patients ranged from 35 to 80 years old with an average of 64.6. Male/female ratio was 1.5. Macroscopically,57.5% of the tumors were in the left lobe and 29.5% were in the right lobe. The average size of the tumor were 4.2 cm at the time of diagnosis. Histologically,pancreato-biliary subtype accounted for 41.8%,intestinal 28.0%,gastric 13.5% and oncocytic 16%. An invasive component is most often present in the pancreato-biliary and gastric subtypes. Despite recent advanced technologies,diagnosis of IpNB is still challenging,especially in western countries due to its rarity. Defined clinicopathologic features are in demand for the accurate diagnosis and proper treatment.

关键词： Intraductal papillary neoplasm Mucinous cystic neo

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护士给产业工人带来初级卫生保健

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国外医学（护理学分册） 1991年第6期10卷 263-264页

作者： rojas p 孙淑宾

现代职业卫生思想赞成为了维护工人的健康而采取一种全面的方法。将职业卫生与社会卫生规划结合起来,不仅能合理地使用有限的保健资源。还能保证兼顾在工业与家庭两方面满足工人健康的需要。同其它发展中国家一样,博茨瓦纳严重缺少卫生... 详细信息

现代职业卫生思想赞成为了维护工人的健康而采取一种全面的方法。将职业卫生与社会卫生规划结合起来,不仅能合理地使用有限的保健资源。还能保证兼顾在工业与家庭两方面满足工人健康的需要。同其它发展中国家一样,博茨瓦纳严重缺少卫生人员。在初级卫生服务中的大多数成员均来源于护士。由于缺乏医生,第一线的治疗,甚至在城市,也由护士完成,所受的传统教育远不能满足实际的需要。为了解决这个矛盾,1980年博茨瓦纳制定了对家庭护士培训的一年计划。其目的是使已注册的护士具备足够的诊治能力,以满足初级卫生保健的需要。经过培训的家庭护士应具备下列能力: 1.健康评价; 2.

关键词：护理人员卫生保健初级

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production of Ag-ZnO powders by hot mechanochemical processing

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Transactions of Nonferrous Metals Society of China 2019年第2期29卷 365-373页

作者： D.GUZMáN C.AGUILAR p.rojas J.M.CRIADO M.J.DIáNEZ R.ESpINOZA A.GUZMáN C.MARTíNEZ Departamento de Ingeniería en Metalurgia Universidad de Atacama Departamento de Ingeniería Metalúrgica y de Materiales Universidad Técnica Federico Santa María Escuela de Dise?o Universidad Adolfo Ibá?ez Instituto de Ciencias de Materiales de Sevilla C.S.I.C Departamento de Ciencia de los Materiales Universidad de Chile Laboratorio de Corrosión Instituto de QuímicaPontificia Universidad Católica de Valparaíso

Ag–CdO composites are still one of the most commonly used electrical contact materials in low-voltage applications owing to their excellent electrical and mechanical ***,considering the restriction on using Cd due to its toxicity,it is necessary to find alternative materials that can replace these *** this study,the synthesis of Ag-ZnO alloys from Ag-Zn solid solutions was investigated by hot mechanochemical *** hot mechanochemical processing was conducted in a modified attritor mill at 138℃under flowing O2 at 1200 cm3/min for 3.0 *** microstructure and phase evolution were investigated using X-ray diffractometry,field emission gun scanning electron microscopy and transmission electron *** results suggest that it is possible to complete the oxidation of Ag-Zn solid solution by hot mechanochemical processing at a low temperature and short *** novel synthesis route can produce Ag-ZnO composites with a homogeneous distribution of nanoscale ZnO precipitates,which is impossible to achieve using the conventional material processing *** the fact that the fundamental approach to improving electric contact material performance resides in obtaining uniform dispersion of the second-phase in the Ag matrix,this new processing route could open the possibility for Ag-ZnO composites to replace non-environmentally friendly Ag-CdO.

关键词： Ag-ZnO nanocomposite electrical contact material powder synthesis milling

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proliferative vitreoretinopathy and its relationship with inflammatory serum biomarkers

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International Journal of Ophthalmology(English edition) 2024年第9期17卷 1659-1664页

作者： Victor Alejandro Martinez pacheco Sergio rojas Juarez Braulio Hernan Velasco Sepulveda Abel Ramirez Estudillo Hospital de Nuestra Señora de la Luz Retina and Vitreous DepartmentMexico City 06030Mexico Instituto de Oftlamología FAp Conde de Valenciana Mexico City 06080Mexico

AIM:To analyze if a relationship between levels ofinflammatory serum biomarkers and severity of primaryproliferative vitreoretinopathy(pVR)***:A retrospective case-control *** adult patients with rhegmatogenous retinaldetachment and primary pVR were included in the *** the control group,healthy adults who underwentcataract surgery were *** grade of pVR wasclassified according to the Retinal Society *** samples were obtained before surgery,and processed in MYTHIC *** of interest wereneutrophil-to-lymphocyte ratio(NLR),platelet-to-lymphocyteratio(pLR),and lymphocyte-to-monocyte ratio(LMR),thetime between the decrease in visual acuity and surgery,pVRgrade,type of surgery,final best corrected visual acuity,andrate of ***:Totally 240 patients were included,120 ineach group,79(65.8%)and 56(46.7%)were male in thepVR and control group,*** A had greaterlevels of monocytes(0.28±0.18 vs 0.12±0.32,p=0.002),neutrophils(4.59±1.51 vs 3.92±1.27,p=0.006),and LMR(9.32±4.42 vs 7.43±3.90,p=0.01).pVR B had a greatermonocyte count(0.30±0.13 vs 0.12±0.32,p=0.001),andpVR C demonstrated higher levels in monocytes(0.27±0.12vs 0.12±0.32,p=0.004),neutrophils(4.39±1.13 vs3.92±1.27,p=0.004),and LMR(9.63±3.24 vs 7.43±3.90,p=0.002)compared to control,*** LMR cut-offvalue of 9.38 predicted pVR with a sensibility of 54.2%andspecificity of 77.5%and NLR cut-off of 1.70 predicted pVRwith a sensibility of 62%and specificity of 54.2%.CONCLUSION:patients with primary pVR demonstrategreater neutrophil,monocyte,and LMR levels than thecontrol ***-off values obtained from ratios could beuseful in a clinical setting when no posterior view of thefundus is possible due to media opacity.

关键词： biomarkers proliferative vitreoretinopathy retinal detachment inflammation serum

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近20 ka以来大陆侵蚀与沉积物向红海和亚丁湾输送的多元示踪研究

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海洋地质 2021年第2期37卷 16-33页

作者： rojas V.p. Meynadier L. Colin C. 李波(译) 不详广州海洋地质调查局海洋基础地质研究所

对采自亚丁湾(MD92-1002)和红海(MD92-1008)盆地的岩心进行了矿物成分、粒度分布以及碎屑组分的^(87)Sr/^(86)Sr和ε_(Nd)研究,以记录包含非洲湿润期(AHp)在内的末次冰期一间冰期转换期间(最近20ka)印度季风和西北风的变化。ε_(Nd)—^(... 详细信息

对采自亚丁湾(MD92-1002)和红海(MD92-1008)盆地的岩心进行了矿物成分、粒度分布以及碎屑组分的^(87)Sr/^(86)Sr和ε_(Nd)研究,以记录包含非洲湿润期(AHp)在内的末次冰期一间冰期转换期间(最近20ka)印度季风和西北风的变化。ε_(Nd)—^(87)Sr/^(86)Sr图表明,沉积物是埃塞俄比亚阿法尔火山岩和阿拉伯一努比亚地盾两个主要沉积物源混合的结果。沉积物同位素和矿物成分的变化表明,火山源p贡献在末次冰消期有所减少。矿物堆积速率和粒度分布的变化指示全新世期间源区干旱程度下降,特别是阿法尔火山区。该区碎肩供应从15cal ka Bp开始下降,可以解释为AHp期间降雨量增加,进而导致东非植被覆盖和湖泊扩张的增加。在阿拉伯半岛,降水局限在南部,沉积物甚至在全新世还被输送。数据表明,西南季风不是风成沉积物进入红海和亚丁湾盆地的主要载体,而是西北风。在红海,同位素和矿物学示踪揭示了16~12 ka Bp之间撒哈拉粉尘的贡献,这些粉尘是在海因里希事件1期间干旱化后从尼罗河流域输送而来。

关键词：放射性同位素粘土矿物学硅质碎屑粒度红海亚丁湾末次冰期非洲湿润期

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Risk Assessment of an Environmental Liability in the Commercialization of Hydrocarbons-A Secondary publication

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Journal of World Architecture 2024年第2期8卷 108-117页

作者： Yamila Navarro Sosa JoséCarlos rojas Acosta Lester Rivas Trasancos Carlos C.Cañete pérez Yuletsis Díaz Rodríguez Center for petroleum Research(CEINpET) HavanaCuba Technological University of Havana JoséAntonio Echeverría HavanaCuba

The risk analysis evaluates the probability of occurrence with the impact of said *** the hydrocarbon sector,an environmental liability is an improperly abandoned facility,soil contaminated by spills or *** objective of this work is to define a risk management *** characterization of the residue and the area was carried *** events were identified:overflow spill,soil contamination by infiltration,as well as radiant heat and suffocating and toxic fumes from a *** matrix method was applied considering the probability of occurrence against *** danger of infiltration implied a high level of *** risk management plan was drawn up,its main action being the liquidation of the pool and the sanitation of the area.

关键词： Hazardous events Environmental liability Waste Risk Vulnerability

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Real World Evidence (RWE, Real World Data), of the Effectiveness of Amoxicillin-Clavulanate in the Treatment of Children with Upper Respiratory Tract Infections (Tonsillitis, Otitis, Sinusitis)

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Open Journal of Respiratory Diseases 2024年第3期14卷 77-89页

作者： Maria Gonzalez Yibirin Juan Chirinos David Alberto Rincón Matute Trinidad Coll Miriam Rosales Yuliana Guevara Kuanlin Doried Guitens pérez Mauribel Figueroa Rosalía Romero Jurgensen Andrea rojas Gabriel Jesús Arismendi González Milagros Salcedo Marife Martina Marin Marcano Carolina Mendoza Marycarmen Anuel Maria Morao Raymond Aguilera Diego Ríos Maryenis Rodríguez Loren Sánchez Jennyfer Fernández Rafael González Zaidith Zerpa Nelson Rodríguez Mirluis rojas Sixtaime Quijada Mariangel Moya Diego Orsini Chris Gómez Hector Gamero José Rodríguez Laboratorios LETI S.A.V. Guarenas Venezuela Ambulatorio Rural tipo II CpT3 Pampatar Venezuela Ambulatorio Los Robles CpT Dr. Luis Rosas Bravo Los Robles Venezuela Clnica prevaler Pampatar Venezuela Hospital tipo 1 Dr. David Espinoza Rojas en Salamanca Salamanca Venezuela Centro Mdico Rotary El Valle Venezuela Ambulatorio Rural Tipo II CpT3 Dr. Enrique Albornoz Lares La Asuncin Venezuela

Real-world evidence (RWE) is clinical evidence on a medical product’s safety and efficacy that is generated using real-world data (RWD) resulting from routine healthcare delivery. This study evaluates the clinical efficacy of amoxicillin + clavulanic acid in children with pharyngitis, acute otitis, or acute rhinosinusitis with suspected bacterial origin under normal office and home conditions. Methods: This was a real-life, prospective, observational, pharmacovigilance study. It included children of both sexes between 2 and 12 years old, with a diagnosis of Rhinopharyngitis (tonsillitis), Acute Otitis Media and Rhinosinusitis. The main effectiveness variable evaluated was reduction and time to resolution of symptoms. All patients received Amoxicillin/Clavulanic Acid suspension 600 mg/42.9 mg/5 mL at a dose of 90 mg/Kg/day in two doses, every 12 hours for 7 days. The evaluations were carried out at the beginning, at 72 hours (3rd day) and at 7 days. All patients underwent culture and antibiogram. Results: The majority of cultures were negative for pathogenic germs, suspecting unidentifiable germs, or viral etiology despite the rigorous selection of subjects following validated scores. The most frequently isolated germ was Staphylococcus aureus;growth of gram-negative bacteria was reported in 33.33% of the cultures. There was a significant improvement in symptoms in children with tonsillitis and rhinosinusitis from the first 72 hours of treatment, persisting until the 7 days. In the otitis media group, returning to normal by the tenth day. During the conduction of this investigation, no adverse effects associated with the prescribed therapy were reported.

关键词： Amoxicillin Clavulanic Acid Tonsillitis Otitis Sinusitis

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Quantum Instability of Magnetized Stellar Objects

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Chinese Journal of Astronomy and Astrophysics 2005年第4期5卷 399-411页

作者： R.González Felipe H.J.Mosquera Cuesta A.pérez Martínez H.pérez rojas Departamento de Física and Centro de Física Teórica de partículas Instituto Superior TécnicoAv.Rovisco Pais1049-001 LisboaPortugal Instituto de Cosmologia Relatividade e Astrofísica(ICRA-BR)Centre Brasileiro de Pesquisas FísicasRua Dr.Xavier Sigaud 150CEP 22290-180UreaRio de JaneiroRJBrazil Centro Latino-Americano de Física Avenida Wenceslau Braz 71CEP 22290-140 fundosBotafogoRio de JaneiroBrazil Instituto de Cibernética Matemática y FísicaCalle E No.30910400 La HabanaCuba

The equations of state for degenerate electron and neutron gases are studied in the presence of magnetic *** including quantum effects in the investigation of the structural properties of these systems,it is found that some hypermagnetized stars can be unstable according to the criterion of stability of *** magnetized white dwarfs should collapse producing a supernova type Ia,while superstrong magnetized neutron stars cannot stand their own magnetic field and must implode,too.A comparison of our results with a set of the available observational data of some compact stars is also presented,and the agreement between this theory and observations is verified.

关键词： dense matter-equation of state-instabilities-stars:magnetic fields-stars:neutron white dwarfs

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Optimizing the delivery of combination therapy for tumors： A mathematical model

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International Journal of Biomathematics 2017年第3期10卷 179-194页

作者： Clara rojas Rodriguez Juan Belmonte-Beitia Departamento de Matematicas E. T. S. de Ingenieros Industriales Universidad de CastiUa-La Mancha 13071 Ciudad Real Spain Instituto de Matemdtica Aplicada a la Ciencia y la Ingenierla (IMA CI) Universidad de Castilla-La Mancha 13071 Ciudad Real Spain

We present in this paper a new mathematical model for the scheduling of angiogenic inhibitors in combination with a chemotherapeutic agent for a tumor. Our model takes into account the process of angiogenesis and the quality of the vasculature discriminating between stable blood vessels and unstable blood vessels. We characterize theoretically the optimal controls on drug distribution to minimize the number of cancer cells at the end of the treatment in a free horizon time problem with restrictions on the total amount of drug doses. Finally, we solve the optimal control problem by using numerical simulations, obtaining as a result that, despite the number of the tumor cells decrease with anti-angiogenic treatment, the best results are reached at the end of the chemotherapy treatment.

关键词： Mathematical modeling of tumor growth anti-angiogenic treatment chemotherapy singular control bang bang control.

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