检索结果-南通市图书馆

Feather content of porphyrins in Eurasian eagle owl(Bubo bubo)fledglings depends on body condition and breeding site quality

引用

Integrative Zoology 2018年第5期13卷 569-578页

作者： Ismael GALVÁN maría del mar delgado Pablo RCAmarERO Rafael MATEO RuiLOURENÇO Vincenzo PENTERIANI Department of Evolutionary Ecology Doñana Biological Station-CSICSevillaSpain Research Unit of Biodiversity-UOCSIC-PA Oviedo UniversityMieresSpain Institute for Game and Wildlife Research IREC-CSIC-UCLM-JCCMCiudad RealSpain Labor-Laboratório de Ornitologia Instituto de Ciências Agrárias e Ambientais MediterrânicasUniversity of EvoraÉvoraPortugal Pyrenean Institute of Ecology(IPE)-CSIC ZaragozaSpain

Porphyrins are pigments produced in most animal cells during the synthesis of heme,but their importance for external coloration is ***(Order Strigiformes)are among the few animals that accumulate porphyrins in the integument,where it could serve as a means of *** we hypothesized that the porphyrin content of feathers may depend on body condition and breeding site quality in Eurasian eagle owl(Bubo bubo)fledglings and,thus,constitute amplifiers of the quality of the area where they are *** high-performance liquid chromatography,we found 2 porphyrins(protoporphyrin IX and coproporphyrin III)in the body feathers of 19 eagle owl fledglings from 7 breeding *** III,but not protoporphyrin IX feather concentration,was positively associated with the body mass of fledglings and with the quality of the breeding sites where they were reared with respect to food quality and *** coproporphyrin III is produced under oxidative stress,we suggest that good breeding sites may lead to fledglings in good ***,in turn,may make fledglings induce a certain level of free radical and coproporphyrin III production to signal to conspecifics their site-mediated capacity to cope with oxidative *** is the first time that porphyrin content in the integument has been found to be related to individual quality,opening a new scenario for studying evolution of animal coloration.

关键词： amplifiers condition-dependence eagle owl fluorescence porphyrins

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

An approach of the internal friction-dependent temperature changes for conventional and pure biogenic lubricating greases

引用

Friction 2024年第4期12卷 780-795页

作者： Leif AHME Erik KUHN MiguelÁngel delgado Department of Mechanical Engineering and Production Management Hamburg University of Applied SciencesHamburg 20099Germany Department of Chemical Engineering Research in Product Technology and Chemical Processes(Pro2TecS)University of HuelvaHuelva 21071Spain

This work investigated the temperature changes inside the bulk of lubricating greases under controlled high-shear stress conditions(250-500 s-1).For this purpose,a newly developed temperature-measuring cell called Calidus was successfully *** temperature changes(ΔT)have been related to the greases'components(thickener,base oil-type,and composition)and the structural degradation of the lubricating ***,a theoretical approach was proposed for calculating the internal temperature change of lubricating greases during shear *** greases showed an internal temperature profile characterised by a sudden rise inΔT within the first 4 h from starting the test and subsequentΔT decay until it reaches the steady state ***,it was found that greases C1 and C5,formulated with lithium and calcium soap,respectively,with different soap content(16.1 wt%and 9.7 wt%,respectively),but the same base castor oil,showed the highest value of the maximumΔT,c.a.3.2 K,and the most drastic drop ofΔ*** greases showed both the highest specific densities and heat *** addition,they showed the lowest ratio of expended energies(Rtee),which means more structural degradation in the stressed *** the contrary,the grease C3,with 13 wt%of Li-soap but the lowest base oil's viscosity,showed the lowest maximumΔT and the temperature profile was characterised by a moderate variation ofΔT along the *** biogenic grease B3 developed a low-temperature change in the group of pure bio-genic greases close to grease C3.

关键词： shear-induced structural degradation rheology temperature measurements lubricating greases density lubricating greases specific heat capacities

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

New environmental factors related to diabetes risk in humans:Emerging bisphenols used in synthesis of plastics

引用

World Journal of Diabetes 2023年第8期14卷 1301-1313页

作者： Rafael Moreno-Gómez-Toledano maría delgado-marín Alberto Cook-Calvete Claudia González-Cucharero Nunzio Alcharani Beatriz Jiménez-Guirado Ignacio Hernandez Rafael Ramirez-Carracedo Laura Tesoro Laura Botana Sandra Sánchez-Esteban Javier Diez-Mata Jose Luis Zamorano Ricardo J.Bosch Carlos Zaragoza marta Saura Universidad de Alcalá Department of Biological Systems/PhysiologyAlcaláde Henares 28871Spain Cardiology Department University Hospital Ramón y CajalMadrid 28034Spain Laboratory of Cardiovascular Pathophysiology Joint Translational Research UnitUniversity Francisco de Vitoria School of MedicineMadrid 28034Spain Instituto Ramón y Cajal de Investigación Sanitaria-IRYCIS Madrid 28034Spain

BACKGROUND Diabetes mellitus(DM)is one of the largest global health emergencies of the 21st *** recent years,its connection with environmental pollutants,such as bisphenol A(BPA),has been demonstrated;consequently,new structurally similar molecules are used to replace BPA in the plastics industry(BPS,BPF and BPAF).AIM To carry out a systematic review to allow coherent evaluation of the state of the ***,a meta-analysis was performed to unify the existing quantitative *** Firstly,a systematic review was carried out,using the terms“(bisphenol)AND(Diabetes OR Hyperglycemia)”,to maximize the number of ***,three authors analyzed the set of ***,a meta-analysis was performed for each BP,using RevMan *** addition,funnel plots were developed to study publication *** The systematic analysis of the literature revealed 13 recent articles(2017–2023)related to the study *** qualitative analysis showed interesting data linking diabetes to the three most widely used substitute BPs in the industry:BPS,BPF and ***,the meta-analysis determined a positive relationship with BPS,BPF and BPAF,which was only statistically significant with *** There is a need to apply the precautionary principle,regulating the use of new ***,replacing BPA with BPS,BPF or BPAF is unlikely to protect the population from potential health risks,such as DM.

关键词： Bisphenol S Bisphenol F Bisphenol AF Diabetes mellitus Systematic review Meta-analysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Land cover changes and fragmentation in mountain neotropical ecosystems of Oaxaca, Mexico under community forest management

引用

Journal of Forestry Research 2019年第1期30卷 143-155页

作者： Rafael M~a Navarro Cerrillo Dennis J.Esteves Vieira Susana Ochoa-Gaona Bernardus H.J.de Jong M~a del mar delgado Serrano Depto. Ingeniería Forestal Laboratorio de SelviculturaDendrocronología y Cambio Climático.Dendrodat Lab-ERSAF Universidad de Córdoba Depto. de Engenharia Florestal Faculdade de Engenharia Florestal Laboratório de Sensoriamento Remoto e Geotecnologia Universidade Federal de Mato Grosso Departamento de Ciencias de la Sustentabilidad El Colegio de la Frontera Sur-Unidad Campeche Depto. Economía Sociología y Política Agrarias Grupo de Evaluación y Restauración de Sistemas Agrícolas y Forestales-ERSAF Universidad de Córdoba

Changes in land cover have a direct impact on forest ecosystem goods and services. In this study, changes in land cover in Sierra de Juarez–Oaxaca ecosystems were estimated using a consistent processing of Landsat images and OBIA methodology. Additionally, landscape analyses using FRAGSTAT were conducted. In 2014, Sierra de Juarez–Oaxaca was covered by approximately 84% of forests, mainly pine-oak and cloud forests. After extensive deforestation until 2001, this trend was reversed and the forest cover surface area in 2014 was slightly higher than in 1979. The comparison of the landscape structure of the forested and agricultural lands suggests an increase in habitat heterogeneity. However, interspersion and juxtaposition indices, showing the patch shape by patch area and perimeter, were similar throughout the study period(1979–2014). Social and economic drivers can explain this situation: namely, community organization, forest enterprises, payment for ecosystem services programs, and changes of agricultural activity. Communities in the Sierra of Oaxaca have reforested degraded lands, created community forest enterprises, and preserved the forest under conservation schemes like those proposed by the Mexican payment for ecosystem services programs. However, their sustainable management faces internal challenges and has become highly dependent on political and institutional decisions beyond their control.

关键词： Tropical and temperate forests Social forestry Land uses segmentation OBIA FRAGSTAT

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Spatial and temporal patterns of forest fires in the Central Monte:relationships with regional climate

引用

Ecological Processes 2024年第1期13卷 66-79页

作者： Pablo Eugenio Villagra Erica Cesca Leandro Manuel Alvarez Silvia delgado Ricardo Villalba Instituto Argentino de Nivología Glaciología y Ciencias Ambientales–CONICET-CCT Mendoza Facultad de Ciencias Agrarias Universidad Nacional de Cuyo

Background Natural and anthropogenic wildfires burn large areas of arid and semi-arid forests with significant socio-economic and environmental impacts. Fire regimes are controlled by climate, vegetation type, and anthropogenic factors such as ignition sources and human-induced disturbances. Projections of climate and land-use change suggest that these controlling factors will change, altering fire regimes in the near future. In the southern Central Monte, Mendoza, Argentina, the factors that modulate the fire temporal and spatial variability are poorly understood. We reconstructed the fire history of southeast of Mendoza from 1984 to 2023 and investigated the relationships between fire extent and climate variability at seasonal and interannual scales. Burned areas were determined using Google Earth Engine by processing Landsat 5-TM, Landsat 7-ETM+, and Landsat 8-OLI-TIRS sensor *** The region exhibited high spatial and temporal variability in fire occurrence, being a mosaic of areas with different fire histories and recovery times. Between 1985 and 2023, fire recurrence ranged from sites unburned to sites with up to 14 fires. The occurrence of large fires was strongly favored by a combination of a year with abundant spring–early summer precipitation, which favors fuel accumulation, followed by a year of low spring–early summer precipitation. Precipitation and burnt area showed a very pronounced 6–7 year cycle, suggesting a dominant climatic control on fire *** Fire distribution in southeastern Mendoza forests is not homogeneous, resulting in a mosaic of patches with different fire histories. This heterogeneity may be related to vegetation patterns and land use. The temporal variability of fires is strongly influenced by climate variability, which would promote fuel production and subsequent drying. Large fires are concentrated in periods of high interannual precipitation variability. Climate change scenarios predict an increase in tem

关键词： Fire recurrence Fire mapping Recovery time Climate Dry forest Wildfire

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Freeze-thaw cycles and associated geomorphology in a post-glacial environment:current glacial,paraglacial,periglacial and proglacial scenarios at Pico de Orizaba volcano,Mexico

引用

Journal of Mountain Science 2024年第6期21卷 1954-1977页

作者： Víctor SOTO Carlos M.WELSH R. Kenji YOSHIKAWA Hugo delgado GRANADOS Centro de Ciencias de la Tierra Universidad VeracruzanaCircuito Gonzalo Aguirre BeltránS/NZona Universitaria91090XalapaMéxico Water and Environmental Research Center University of Alaska FairbanksFairbanksAlaska 99775USA Instituto de Geofísica Universidad Nacional Autónoma de MéxicoCiudad de México 04150México Department of Earth and Environmental Sciences Ludwig Maximilians UniversitätMunich 80333Germany

The glacial history of Pico de Orizaba indicates that during the Last Glacial Maximum,its icecap covered up to~3000 m asl;due to the air temperature increasing,its main glacier has retreated to 5050 m *** retraction of the glacier has left behind an intense climatic instability that causes a high frequency of freeze-thaw cycles of great intensity;the resulting geomorphological processes are represented by the fragmentation of the bedrock that occupies the upper parts of the *** is a notable lack of studies regarding the fragmentation and erosion occurring in tropical high mountains,and the associated geomorphological risks;for this reason,as a first stage of future continuous research,this study analyzes the freezing and thawing cycles that occur above 4000 m asl,through continuous monitoring of surface ground *** results allow us to identify and characterize four zones:glacial,paraglacial,periglacial and *** was found that the paraglacial zone presents an intense drop of temperature,of up to~9℃ in only sixty *** rock fatigue and intense freeze-thaw cycles that occur in this area are responsible for the high rate of rock disintegration and represent the main factor of the constant slope dynamics that occur at the *** activity decreases,both in frequency and intensity,according to the distance to the glacier,which is where the temperature presents a certain degree of stability,until reaching the proglacial zone,where cycles are almost non-existent,and therefore there is no gelifraction *** geomorphological processes have resulted in significant alterations to the mountain slopes,which can have severe consequences in terms of risk and water.

关键词： Freeze-Thaw Gelifraction Mountain mechanical erosion Periglacial geomorphology Postglacial scenarios

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Promotion of structural plasticity in area V2 of visual cortex prevents against object recognition memory deficits in aging and Alzheimer's disease rodents

引用

Neural Regeneration Research 2024年第8期19卷 1835-1841页

作者： Irene Navarro-Lobato mariam Masmudi-martín Manuel F.López-Aranda Juan F.López-Téllez Gloria delgado Pablo Granados-Durán Celia Gaona-Romero marta Carretero-Rey Sinforiano Posadas maría E.Quiros-Ortega Zafar U.Khan Laboratory of Neurobiology Centro de Investigaciones Médico Sanitarias(CIMES)University of MalagaMalagaSpain Department of Medicine Faculty of MedicineUniversity of MalagaMalagaSpain Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas(CIBERNED) Institute of Health Carlos IIIMadridSpain the Donders Institute for Brain Cognition and Behaviour Radboud UniversityNijmegenThe Netherlands the Brain Metastasis Group National Cancer Research Centre(CNIO)MadridSpain the Department of Neurobiology University of California-Los AngelesLos AngelesCAUSA

Memory deficit,which is often associated with aging and many psychiatric,neurological,and neurodegenerative diseases,has been a challenging issue for *** till now,all potential drug candidates have failed to produce satisfa ctory ***,in the search for a solution,we found that a treatment with the gene corresponding to the RGS14414protein in visual area V2,a brain area connected with brain circuits of the ventral stream and the medial temporal lobe,which is crucial for object recognition memory(ORM),can induce enhancement of *** this study,we demonstrated that the same treatment with RGS14414in visual area V2,which is relatively unaffected in neurodegenerative diseases such as Alzheimer s disease,produced longlasting enhancement of ORM in young animals and prevent ORM deficits in rodent models of aging and Alzheimer’s ***,we found that the prevention of memory deficits was mediated through the upregulation of neuronal arbo rization and spine density,as well as an increase in brain-derived neurotrophic factor(BDNF).A knockdown of BDNF gene in RGS14414-treated aging rats and Alzheimer s disease model mice caused complete loss in the upregulation of neuronal structural plasticity and in the prevention of ORM *** findings suggest that BDNF-mediated neuronal structural plasticity in area V2 is crucial in the prevention of memory deficits in RGS14414-treated rodent models of aging and Alzheimer’s ***,our findings of RGS14414gene-mediated activation of neuronal circuits in visual area V2 have therapeutic relevance in the treatment of memory deficits.

关键词： behavioral performance brain-derived neurotrophic factor cognitive dysfunction episodic memory memory circuit activation memory deficits memory enhancement object recognition memory prevention of memory loss regulator of G protein signaling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Association of Congenital Heart Defects (CHD) with Factors Related to Maternal Health and Pregnancy in Newborns in Puerto Rico

引用

Congenital Heart Disease 2024年第1期19卷 19-31页

作者： Yamixa delgado Caliani Gaytan Naydi Perez Eric Miranda Bryan Colón Morales Mónica Santos Biochemistry&Pharmacology Department San Juan Bautista School of MedicineCaguas00726Puerto Rico Hispanic Alliance for Clinical and Translational Research University of Puerto Rico Medical Sciences CampusSan Juan00936Puerto Rico Department of Internal Medicine University of Puerto Rico Medical Sciences CampusSan Juan00936Puerto Rico

Background:Given the pervasive issues of obesity and diabetes both in Puerto Rico and the broader United States,there is a compelling need to investigate the intricate interplay among body mass index(BMI),pregesta-tional,and gestational maternal diabetes,and their potential impact on the occurrence of congenital heart defects(CHD)during neonatal ***:Using the comprehensive System of Vigilance and Surveillance of Congenital Defects in Puerto Rico,we conducted a focused analysis on neonates diagnosed with CHD between 2016 and *** assessment encompassed a range of variables,including maternal age,gestational age,BMI,pregestational diabetes,gestational diabetes,hypertension,history of abortion,and presence of ***:A cohort of 673 patients was included in our *** average maternal age was 26 years,within a range of 22 to 32 *** mean gestational age measured 39 weeks,with a median span of 38 to 39 *** the 673 patients,274(41%)mothers gave birth to neonates diagnosed with *** this group,22 cases were linked to pre-gestational diabetes,while 202 were not;20 instances were associated with gestational diabetes,compared to 200 without;and 148 cases exhibited an overweight or obese BMI,whereas 126 displayed a normal ***:We identiﬁed a statistically signiﬁcant correlation between pre-gestational diabetes mellitus and the occurrence of ***,our analysis did not show a statistically signiﬁcant association between maternal BMI and the likelihood of *** results may aid in developing effective strategies to prevent and manage CHD in neonates.

关键词： Congenital heart defects(CHD) obesisty maternal health diabetes body mass index(BMI)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Context-dependent role of sirtuin 2 in inflammation

引用

Neural Regeneration Research 2025年第3期20卷 682-694页

作者： NoemíSola-Sevilla Maider Garmendia-Berges MCarmen Mera-delgado Elena Puerta Department of Pharmaceutical Sciences Division of PharmacologySchool of Pharmacy and NutritionUniversity of NavarraPamplonaSpain Navarra Institute for Health Research(IdiSNA) PamplonaSpain

Sirtuin 2 is a member of the sirtuin family nicotinamide adenine dinucleotide(NAD~+)-dependent deacetylases, known for its regulatory role in different processes, including inflammation. In this context, sirtuin 2 has been involved in the modulation of key inflammatory signaling pathways and transcription factors by deacetylating specific targets, such as nuclear factor κB and nucleotide-binding oligomerization domain-leucine-rich-repeat and pyrin domain-containing protein 3(NLRP3). However, whether sirtuin 2-mediated pathways induce a pro-or an anti-inflammatory response remains controversial. Sirtuin 2 has been implicated in promoting inflammation in conditions such as asthma and neurodegenerative diseases, suggesting that its inhibition in these conditions could be a potential therapeutic strategy. Conversely, arthritis and type 2 diabetes mellitus studies suggest that sirtuin 2 is essential at the peripheral level and, thus, its inhibition in these pathologies would not be recommended. Overall, the precise role of sirtuin 2 in inflammation appears to be context-dependent, and further investigation is needed to determine the specific molecular mechanisms and downstream targets through which sirtuin 2 influences inflammatory processes in various tissues and pathological conditions. The present review explores the involvement of sirtuin 2 in the inflammation associated with different pathologies to elucidate whether its pharmacological modulation could serve as an effective strategy for treating this prevalent symptom across various diseases.

关键词： interferon inflammation lipopolysaccharide neuroinflammation NLRP3 nuclear factorκB sirtuin 2

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Association between lifestyle factors and thyroid function in young euthyroid adults

引用

Food Science and Human Wellness 2024年第1期13卷 265-275页

作者： Elisa Merchan-Ramirez Guillermo Sanchez-delgado Lucas Jurado-Fasoli Francisco M Acosta Manuel Munoz-Torres Jose M.Llamas-Elvira Jonatan R Ruiz Sport and Health University Research Institute(iMUDS) Faculty of Sports ScienceUniversity of GranadaGranada 18016Spain Pennington Biomedical Research Center Baton Rouge 70808USA Faculty of Medicine University of GranadaGranada 18071Spain Turku PET Centre University of TurkuTurku 20500Finland Turku PET Centre Turku University HospitalTurku 20520Finland Biosanitary Research Institute of Granada(Ibs.Granada) Granada 18012Spain CIBERFES Instituto de Salud CarlosⅢMadrid 28029Spain Endocrinology and Nutrition Service University Hospital San CecilioGranada 18016Spain Nuclear Medicine Service "Virgen de las Nieves"University HospitalGranada 18014Spain

Purpose:The present work examines the associations of dietary habits,sedentarism,physical activity(PA)levels and sleep habits,with thyroid function in young euthyroid ***:A total of 105 young euthyroid adults participated in this cross-sectional *** function was determined in fasting conditions(>6 h).Dietary habits were measured by a food frequency questionnaire and three non-consecutive 24 h recalls,and different dietary intake and patterns were then *** time spent in sedentary,PA levels and sleep habits were objectively measured using a wrist-worn ***:Energy and carbohydrate intake were positively associated with thyroid stimulating hormone(TSH)(β=0.222;R^(2)=0.102;P=0.022 andβ=0.425;R^(2)=0.129;P=0.007,respectively)whereas fat intake was negatively associated with TSH(β=-0.428;R^(2)=0.137;P=0.004).Energy intake was also positively associated with free triiodothyronine(β=0.277;R^(2)=0.137;P=0.004).Further,adherence to the Mediterranean diet was negatively related to TSH and free thyroxine(FT4)(β=-0.221;R^(2)=0.113;P=0.020 andβ=-0.268;R^(2)=0.071;P=0.007,respectively).Vigorous-intensity and overall PA were negatively associated with FT4(β=-0.227;R^(2)=0.052;P=0.022 andβ=-0.204;R^(2)=0.042;P=0.041,respectively).In contrast,no associations were found between sleep parameters and thyroid ***:Lifestyle factors such as dietary intake and PA levels seems to be related to thyroid function even in young euthyroid adults.

关键词： Thyroid hormones Dietary intake Sleep Physical activity Euthyroid

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：