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Identification of tree groups used by secondary cavity-nesting birds to simplify forest management in subtropical forests

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Journal of Forestry Research 2020年第4期31卷 1417-1424页

作者： Alejandro A.Schaaf Román A.Ruggera Ever Tallei constanza g.vivanco Luis Rivera Natalia Politi Instituto de Ecorregiones Andinas(INECOA) Universidad Nacional de Jujuy–Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET)Av.Bolivia 12394600 San Salvador de JujuyJujuyArgentina Fundación CEBio Roca 444600 San Salvador de JujuyJujuyArgentina

In tropical and subtropical forest ecosystems,cavities formed by decay processes are a key but scarce resource for birds that nest and roost in them,which makes them a highly sensitive group to *** piedmont forest of northwestern Argentina is a complex ecosystem with 113 tree and 120 bird *** has high logging pressure on the few,well-conserved forest remnants,complicating the delineation of sustainable management guidelines for each tree or bird species in a short *** objective was to reduce the complexity of subtropical forests by grouping tree species according to the characteristics used by secondary cavity-nesting birds(*** excavators).In the piedmont forest,50 plots of 0.25 ha were sampled to record cavity trees and cavity *** were then used in a cluster analysis to form tree ***,cavities were searched to identify the bird species using the decay-formed cavities.A total of 187 cavity trees,comprising 23 tree species,were recorded,and these formed four tree groups or *** recorded 86 cavities that were used by secondary cavitynesting bird *** four tree groups were unequally used by secondary cavity *** tree group that included valuable timber species(Myroxylon peruiferum,Anadenanthera colubrina and Calycophyllum multiflorum)and had the greatest cavity availability represented 71%of total cavity *** tree group with valuable timber species(Cedrela balansae and Amburana cearensis),measured>73 cm DBH and>21 m tall,had cavity entrances>0.10 cm2,and contributed 14%of all cavity use by birds.A third group had no highly economically valuable tree species,and included the snag category(*** dead trees)as well as a 15%of cavity *** fourth tree group had a DBHghly economically valuable tree species(Cordia trichotoma),and supported no cavity *** clustering of subtropical trees can reduce the complexity of these forests,hence easing their management by

关键词： Biodiversity Cavity-nesting birds Conservation Logging

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Mice with a heterozygous Lrp6 deletion have impaired fracture healing

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Bone Research 2016年第2期4卷 101-109页

作者： Travis A Burgers Juan F vivanco Juraj zahatnansky Andrew J Vander Moren James J Mason Bart O Williams Center for Cancer and Cell Biology Program for Skeletal Disease and Tumor Microenvironment Van Andel Research Institute Grand Rapids MhUSA Faculfad de Ingenieria y Ciencias Adolfo Ib6fiez University Vifia del Mar Chile padnos College of Engineering and Computing Grand Valley State University Grand Rapids MI USA

Bone fracture non-unions, the failure of a fracture to heal, occur in 10%-20% of fractures and are a costly and debilitating clinical problem. The Wnt/fl-catenin pathway is critical in bone development and fracture healing. Polymorphisms of linking low-density lipoprotein receptor-related protein 6 （LRP6）, a Wnt-binding receptor, have been associated with decreased bone mineral density and fragility fractures, although this remains controversial. Mice with a homozygous deletion of Lrp6 have severe skeletal abnormalities and are not viable, whereas mice with a heterozygous deletion have a combinatory effect with Lrp5 to decrease bone mineral density. As fracture healing closely models embryonic skeletal development, we investigated the process of fracture healing in mice heterozygous for Lrp6 （Lrp6~/-） and hypothesized that the heterozygous deletion of Lrp6 would impair fracture healing. Mid-diaphyseal femur fractures were induced in Lrp6~^- mice and wild-type controls （Lrp6~/~）. Fractures were analyzed using micro-computed tomography （~CT） scans, biomechanical testing, and histological analysis. Lrp6~/- mice had significantly decreased stiffness and strength at 28 days post fracture （PF） and significantly decreased BV/TV, total density, immature bone density, and mature area within the callus on day-14 and -21 PF; they had significantly increased empty callus area at days 14 and 21 PF. Our results demonstrate that the heterozygous deletion of Lrp6 impairs fracture healing, which suggests that Lrp6 has a role in fracture healing.

关键词： bone Mice with a heterozygous Lrp6 deletion have impaired fracture healing

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Christian vivanco的“情感实验室”

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现代装饰（家居） 2013年第1期 121-125页

作者： Christian vivanco Danya

墨西哥设计师Christian vivanco是一位创意家具及产品设计师,擅长利用"借鉴"、"改良"、"置换"等设计手法,将现代与传统结合,其作品融汇了大量的墨西哥传统文化元素,更像个人对历史与人文情愫的表达。在他看来,他所设计的是一种能够满足... 详细信息

墨西哥设计师Christian vivanco是一位创意家具及产品设计师,擅长利用"借鉴"、"改良"、"置换"等设计手法,将现代与传统结合,其作品融汇了大量的墨西哥传统文化元素,更像个人对历史与人文情愫的表达。在他看来,他所设计的是一种能够满足日常基本生活所需的功能性产品,按照他自己的话来说。

关键词：功能性产品传统文化元素转动角度复古风泰迪熊储物空间极简主义塑料材质金属零件阅读灯

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Anaerobic Mono-Digestion of Turkey Manure: Efficient Revaluation to Obtain Methane and Soil Conditioner

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Journal of Water Resource and Protection 2011年第8期3卷 584-589页

作者： Rolando Chamy Elba vivanco Carlos Ramos 不详

This work demonstrates the possibility to make a full valuation of a solid waste such as turkey manure, to obtain methane and a soil conditioner/fertilizer from turkey manure anaerobic digestion in a mesophilic pilot-scale continuous stirred tank reactor at different organic loading rates (OLR) (from 0.5 to 2.5 kgVS/m3d). The application of the anaerobic mono-digestion for the turkey manure treatment was an efficient alternative, because high volatile solids removal and methane were obtained in addition to obtaining a stabilized solid waste that can be applied as soil conditioner, based on its nutritional parameters and humic substances content. In this way, the turkey manure anaerobic digestion can be applied avoiding the co-digestion of the manure with other wastes and allows a process devoid of pollutant emissions, obtaining two products. The reactor operation depends on the OLR, and its operation does not allow an OLR above 1.5 kgVS/m3d. Higher OLR produced a decrease in the TS and VS removals and methane productivity.

关键词： Methane Biomethanization Solid Wastes Turkey Manure Soil Conditioner Fertilizer

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Relation between Antibacterial Activity against Food Transmitted Pathogens and Total Phenolic Compounds in grape Pomace Extracts from Cabernet Sauvignon and Syrah Varieties

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Advances in Microbiology 2014年第5期4卷 225-232页

作者： Loreto Sanhueza Mario Tello Marcela vivanco Leonora Mendoza Marcela Wilkens Laboratorio de Metagenómica Bacteriana Facultad de Química y Biología Universidad de Santiago de Chile Santiago Chile Laboratorio de Micología Facultad de Química y Biología Facultad de Química y Biología Universidad de Santiago de Chile Santiago Chile Laboratorio de Microbiología Básica y Aplicada Facultad de Química y Biología Universidad de Santiago de Chile Santiago Chile

grape pomace is the main by-product of wine production that concentrates bioactive metabolites of polyphenolic nature with antibacterial activity. Since grape pomace composition varied depending on grape variety, climate, vineyard location, and winemaking technology, it is important to study the composition and antibacterial activity of each variety separately. In this study, antibacterial activity against different food pathogens was evaluated and its relation with polyphenols content was determined. grape pomace from Cabernet Sauvignon and Syrah varieties was extracted with methanol/HCl 1% (v/v), followed by sequential extractions with hexane, chloroform and ethyl acetate. Ethyl acetate fraction had the highest antibacterial activity determined through the microdilution method, reaching over 90% of inhibition at 500 μg·ml-1 with the exception of Salmonella Typhi (70% of inhibition). Staphylococcus aureus and Escherichia coli were the most susceptible strains, exceeding 50% of inhibition at 62.5 μg·ml-1. Ethyl acetate fraction contains the highest phenolic concentration in both Cabernet Sauvignon (132.2 mg of gAE g-1) and Syrah (102.6 mg of gAE g-1) pomace, as determined by the Folin-Ciocalteau method. Antibacterial activity present in grape pomace extracts is in direct relation to the polar phenolic content, in particular that from Cabernet Sauvignon.

关键词： Antibacterial Activity grape Pomace Extract Ethyl Acetate Fraction Total Phenolic Content

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Impact of the Transboundary Transport of Air Pollutants on Air Quality in Spain

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Journal of Environmental Protection 2012年第9期3卷 1167-1175页

作者： Marta g. vivanco Inmaculada Palomino Juan Luis garrido Ma ángeles gonzález gonzalo Alonso Fernando Martín Centro de Investigaciones Energéticas Medioambientales y Teconológicas (CIEMAT) Air Pollution Unit Madrid Spain

Although compliance with the European limit values for air pollutants has been achieved over large parts in Spain, some challenges remain for O3 on the maximum daily 8-hour mean and information limit values, for particulate matter on the PM10 annual and daily limit values and for NO2 on annual and hourly limit values. Transboundary transport of air pollutants has started to be recognized as a mechanism affecting air quality. Nevertheless, as a consequence of the complexity of atmospheric chemistry it is not easy to determine the importance of this effect. Photochemical models constitute an adequate tool to address this challenge, allowing the identification of pollutant pathways and the quantifi- cation of the influence of long-range transport of air pollutants. In this paper we evaluate the influence of out-of-Spain emissions on this non-compliance picture by using the CHIMERE photochemical model. For this purpose the model was run at a 0.2?-horizontal resolution for a European domain. Although at this resolution not all the local effects can be captured, transboundary transport of air pollutants can be examined. Several simulations were performed considering different emission scenarios. To see all out-of-Spain emissions influence, all the emissions were set to zero, excepting those in Spain. This includes examining European and ships effects on air quality in Spain. A second simulation was performed setting to zero just European-countries emissions, to see the effect of Europe. The third and fourth simulations were carried out by setting to zero France and Portugal emissions respectively. Ozone has been found to be the pollutant more affected by this transboundary transport, in particular in the summer period. The model indicates that the incoming air masses contributed in 2009 to the non-compliance with the European normative regulating the maximum daily 8-hour mean.

关键词： Transboundary Transport Air Pollution

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Root Secretion of Phytochemicals in Arabidopsis Is Predominantly Not Influenced by Diurnal Rhythms

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Molecular Plant 2010年第3期3卷 491-498页

作者： Dayakar V. Badri Victor M. Loyola-Vargas Corey D. Broeckling Jorge M. vivanco Center for Rhizosphere Biology Colorado State University Fort Collins CO 80523 USA 30 Col. Chuburna de Hidalgo Merida Yucatan Mexico

Root-secreted phytochemicals mediate multiple interactions in the rhizosphere. The root exudation process can be altered by various biotic factors, including pathogenic and non-pathogenic microbes, and abiotic factors like temperature and soil moisture. It has been suggested that root secretion of specific flavonoids is influenced by diurnal rhythms （by light or dark） but a comprehensive analysis of the overall secretion of phytochemicals in response to diurnal rhythms has not been studied. In this study, we analyzed the effect of light/dark cycles on root exudation profiles using Arabidopsis as a model plant. Our results reveal that the root secretion of phytochemicals is partly regulated by the diurnal light cycle and follows two main patterns of secretion：（1） the large majority of phytochemicals in the exudates showed no diurnal pattern in their secretion, and （2） a few compounds showed a diurnal pattern in their secretion： three compounds increased in secretion only under light; two compounds increased in secretion only while it was dark; and two compounds increased in secretion during the transition from dark to light. Root-specific ABC transporters have been implicated in root exudation; an analysis of the gene expression patterns of ABC transporters in the roots of Arabidopsis at specific time points revealed that none of the ABC transporters followed a diurnal expression pattern, suggesting that they are expressed constantly during the day and night. Similarly, we analyzed the expression in roots of genes involved in secondary metabolite biosynthesis and found that some of the genes involved in phenylpropanoid and glucosinolate biosynthesis （i.e. 4-coumarate-CoA ligases （4CL1 and 4CL2）, flavonol synthases （FSl and FS2）, and CYP79B3） followed distinct diurnal expression patterns. Overall, we have discovered that while root exudation of the majority of phytochemicals is constitutive, the secretion of a few compounds follows a diurnal rhythm, which is in accor

关键词： Arabidopsis diurnal rhythm root exudates ABC transporters secondary metabolite biosynthesis.

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Bacteriological Profile in Diabetic Foot Patients

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Journal of Diabetes Mellitus 2017年第4期7卷 265-274页

作者： Adriana Lam vivanco Flor María Espinoza Fabián Cuenca Mayorga Jovanny Santos Luna Marlene Chamba Tandazo Elida Yesica Reyes Rueda Kerly Davila Davila Technical University of Machala Machala Ecuador

One of the complications carried by diabetes clinical pictures is the so-called diabetic foot, regardless of age, genre, ethnic group, and socio-economic level;limb amputation is usually an inevitable means to an end. The present research work had the purpose to determine microorganism responsible of ulcer infection in diabetic foot on its more frequent occurrence. Diabetic foot is a public health issue for its high incidence and its high sanitary costs. The present work consisted on a descriptive-retrospective research to seventy patients who were attended in a privately-owned hospital in Machala-Ecuador. Type III (according to Wagner scale) was determined as most frequent value. Microorganisms with a higher incidence degree were found to be gram-negative bacteria Escherichia Coli 27 (69.28%) and gram-positive bacteria Staphylococcus aereus 25 (80%).

关键词： Diabetic Foot Bacteria gram-Negative Escherichia coli gram-Positive Staphylococcus aerus

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Final Results of a Phase II Study of Bevacizumab, Cisplatin and Pemetrexed as First-Line Therapy for Patients with Advanced Non-Squamous Non-Small Cell Lung Cancer

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Journal of Cancer Therapy 2016年第7期7卷 455-463页

作者： guillermo López vivanco Eider Azkona Sergio Carrera Aintzane Sancho Itziar Rubio Juan Manuel Mañé Begoña Calvo Unai Aresti Aitziber Buque Inés Marrodán Alberto Muñoz Servicio de Oncología Médica Hospital de Cruces Bilbao Spain

Background: Efficacy and safety data for cisplatin and pemetrexed plus bevacizumabinnon squamousnon non-small cell lung cancer (NSCLC) are still limited. Nevertheless, either bevacizumab plus platinum doublet or pemetrexed plus platinum is approved options for first line therapy. Predictive factors for bevacizumab are needed. KRAS is one of the most common oncogenic drivers in lung cancer. Its prognostic and predictive value in NSCLC is under investigation. Patients and methods: This trial evaluates the addition of bevacizumab 7.5 mg/kg to cisplatin 75 mg/m2 plus pemetrexed 500 mg/m2 as first line treatment in stage IV non-squamous NSCLC patients. Maintenance bevacizumab was received as monotherapy until progressive disease, unacceptable toxicityor consent with drawal. The primary objective was progression free survival (PFS). Secondary objectives included overall survival (OS), safety, global objective responses and the determination of KRAS mutation at baseline. Results: From March 2009 to March 2012, 31 patients were enrolled. Mean age was 59.19 (standard deviation (SD) 8.53). From all the patients included in this trial, 67.70% were men. KRAS was wild type in 19 patients (58.06%);in 7 (22.58%) was mutated and was unknown in 6 patients (19.35%). Median PFS for KRAS mutated patients was 4 months, whereas for the KRAS wild type it was 7.9 months (P = 0.0031). Median OS was 4 months for the KRAS population, and 16.1 months for the KRAS wild type (P = 0.0032). Twenty four patients (77.42%) experienced at least a grade 3 - 4 adverse event. The most common grade 3 - 4 toxicity was asthenia. Conclusions: Both PFS and OS were statistically longer for the KRAS wild type patients compared with the KRAS mutated population (P = 0.0031). Median OS was shorter than the reported in previous trials with bevacizumab. Nevertheless, focussing on the OS for KRAS wild type patients, this achieves a result or 16.1 months. Therefore, this would be a consistent dat

关键词： Non-Small-Cell Lung Cancer Bevacizumab Pemetrexed Predictive Biomarker KRAS

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Anaerobic Mono-Digestion of Turkey Manure: Efficient Revaluation to Obtain Methane and Soil Conditioner

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Journal of Water Resource and Protection（水资源与保护） 2011年第8期 584-589页

作者： Rolando Chamy Elba vivanco Carlos Ramos

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