检索结果-南通市图书馆

Sex ratio of mirid populations shifts in response to hostplant co-infestation or altered cytokinin signaling

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2017年第1期59卷 44-59页

作者： nora adam Theresa Erler Mario Kallenbach Martin Kaltenpoth Grit Kunert Ian T.Baldwin Meredith C.Schuman Department of Molecular Ecology Max Planck Institute for Chemical Ecology Hans-Knoll-Straβe 8 07745 Jena Germany German Centre for Integrative Biodiversity Research (iDiv) Deutscher Platz5e 04103 Leipzig Germany Max Planck Research Group Insect Symbiosis Max Planck Institute for Chemical Ecology Hans-Knoll-Straβe 8 07745 Jena Germany Department of Biochemistry Max Planck Institute for Chemical Ecology Hans-Knoll-Straβe 8 07745 Jena Germany

Herbivore species sharing a host plant often compete. In this study, we show that host plant-mediated interaction between two insect herbivores-a generalist and a specialist-results in a sex ratio shift of the specialist＇s offspring. We studied demographic parameters of the specialist Tupiocoris notatus（Hemiptera： Miridae）when co-infesting the host plant Nicotiana attenuata（Solanaceae） with the generalist leafhopper Empoasca sp.（Hemiptera： Cicadellidae）. We show that the usually female-biased sex ratio of T. notatus shifts toward a higher male proportion in the offspring on plants coinfested by Empoasca sp. This sex ratio change did not occur after oviposition, nor is it due differential mortality of female and male nymphs. Based on pyrosequencing and PCR of bacterial 16 S rRNA amplicons, we concluded that sex ratio shifts were unlikely to be due to infection with Wolbachia or other known sex ratio-distorting endosymbionts. Finally, we used transgenic lines of *** to evaluate if the sex ratio shift could be mediated by changes in general or specialized host plant metabolites. We found that the sex ratio shift occurred on plants deficient in two cytokinin receptors（irCHK2/3）.Thus, cytokinin-regulated traits can alter the offspring sex ratio of the specialist ***.

关键词： Empoasca populations specialist offspring Hemiptera altered Nicotiana specialized Solanaceae transgenic

Friction and wear performance of polyether ether ketone(PEEK)polymers in three lubrication regimes

在线全文

学校读者我要写书评

暂无评论

Friction 2024年第4期12卷 670-682页

作者： Davide MASSOCCHI nora LECIS Marco LATTUADA Davide SCAGLIA Steven CHATTERTON Paolo PENNACCHI Department of Mechanical Engineering Politecnico di MilanoMilan 20156Italy Eni SpA Downstream product R&DLombardia 20097Italy Eurobearings S.R.L. Lombardia 29016Italy

This experimental study investigates the friction and wear of three coatings commonly used in industrial applications,particularly in hydrodynamic *** three materials under investigation were Babbitt,polyether ether ketone(PEEK)reinforced with 15%carbon fibers,and PEEK reinforced with 20%carbon *** first polymer material was extruded,while the other was produced by fused deposition modelling(FDM).The materials were subjected to sliding tests in a pin-on-disc configuration,with a steel ball serving as the counter *** tests were conducted at room temperature,with a load of 10 N and under three different lubrication conditions:dry,grease,and *** linear speed was set at 0.3 m/s for the dry and semi-solid lubrication tests,while for the oil tests,the speed was set at 0.25 m/*** greases used had consistency grades of NGLI 000 and NGLI *** ISO VG 68 circulation oil was used for the oil lubrication ***,thermodynamic analyses were performed under the most severe conditions(i.e.,dry)to investigate the steel-Babbitt and steel-PEEK contact.

关键词： hydrodynamic bearings polyether ether ketone(PEEK)polymers additive manufacturing grease lubrication sliding oil lubrication ball-on-disk tribology

Recovery rates and long-term olfactory dysfunction following COVID-19 infection

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Otorhinolaryngology-Head and Neck Surgery 2024年第2期10卷 121-128页

作者： Melanie Dias Zara Shaida nora Haloob Claire Hopkins ENT Department Guy's HospitalLondonUK

Objectives:Olfactory dysfunction is one of the most recognized symptoms of COVID-19,significantly impacting quality of life,particularly in cases where recovery is *** review aims to explore patterns of olfactory recovery post-COVID-19 infection,with particular focus on delayed *** Sources:Published literature in the English language,including senior author's own work,online and social media platforms,and patients'anecdotal ***:A comprehensive review of the literature was undertaken by the authors with guidance from the senior author with expertise in the field of ***:Based on self-report,an estimated 95%of patients recover their olfactory function within 6 months post-COVID-19 ***,psychophysical testing detects higher rates of persistent olfactory *** has been found to continue for at least 2 years postinfection;negative prognostic indicators include severe olfactory loss in the acute phase,female sex,and older *** in quantitative and qualitative disturbance in prolonged cases likely reflects both peripheral and central pathophysiological *** of many of the reviewed studies reflect lack of psychophysical testing and baseline olfactory ***:Post-COVID-19 olfactory dysfunction remains a significant health and psychosocial *** evidence is improving awareness and knowledge among clinicians to better support patients through their olfactory rehabilitation,with hope of recovery after several months or *** research is needed to better understand the underlying pathogenesis of delayed recovery,identify at risk individuals earlier in the disease course,and develop therapeutic targets.

关键词： anosmia COVID-19 olfaction parosmia recovery

Non-pancreatic hyperlipasemia:A puzzling clinical entity

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第19期30卷 2538-2552页

作者： Krisztina Eszter Feher David Tornai Zsuzsanna Vitalis Laszlo Davida nora Sipeki Maria Papp Division of Gastroenterology Department of Internal MedicineFaculty of MedicineUniversity of DebrecenDebrecen H-4032Hajdu-BiharHungary Kalman Laki Doctoral School of Biomedical and Clinical Sciences Faculty of MedicineUniversity of DebrecenDebrecen H-4032Hungary

BACKGROUND Increased lipase level is a serological hallmark of the diagnosis of acute pancreatitis(AP)but can be detected in various other diseases associated with lipase leakage due to inflammation of organs surrounding the pancreas or reduced renal clearance and/or hepatic *** non-pancreatic hyperlipasemia(NPHL)is puzzling for attending physicians during the diagnostic procedure for *** would be clinically beneficial to identify the clinical and laboratory variables that hinder the accuracy of lipase diagnosis with the aim of improve it.A more precise description of the NPHL condition could potentially provide prognostic factors for adverse outcomes which is currently *** To perform a detailed clinical and laboratory characterization of NPHL in a large prospective patient cohort with an assessment of parameters determining disease *** A Hungarian patient cohort with serum lipase levels at least three times higher than the upper limit of normal(ULN)was prospectively evaluated over 31 *** were identified using daily electronic laboratory reports developed to support an ongoing observational,multicenter,prospective cohort study called the EASY trial(ISRCTN10525246)to establish a simple,easy,and accurate clinical scoring system for early prognostication of *** of NPHL was established based on≥3×ULN serum lipase level in the absence of abdominal pain or abdominal imaging results characteristic of *** A total of 808 patients[male,n=420(52%);median age(IQR):65(51-75)years]were diagnosed with≥3×ULN serum lipase levels.A total of 392 patients had AP,whereas 401 had NPHL with more than 20 different *** and acute kidney injury(AKI)were the most prevalent etiologies of NPHL(27.7%and 33.2%,respectively).The best discriminative cut-off value for lipase was≥666 U/L(sensitivity,71.4%;specificity,88.8%).The presence of AKI or sepsis negatively affected the diagnostic performance of *** w

关键词： Non-pancreatic hyperlipasemia Acute pancreatitis Glycoprotein 2 Acute kidney injury Sepsis Mortality

Hard life for sons in the nest?Sex-dependent offspring mortality in Great Tits in urban and forest areas

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Avian Research 2024年第1期15卷 91-97页

作者： nora Agh Henriett Anna Dalvári Krisztián Szabó Ivett Pipoly András Liker HUN-REN-PE Evolutionary Ecology Research Group University of PannoniaH-8200VeszpremPf.1158.Hungary Behavioral Ecology Research Group Center for Natural SciencesUniversity of PannoniaH-8200Pf.1158.VeszpremHungary Molecular Ecology Research Group Department of EcologyUniversity of Veterinary Medicine BudapestH-1400Pf.2.BudapestHungary Synlab Hungary Ltd. H-1211Weiss Manfr´ed Str.5-7BudapestHungary

Sex-biased mortality can occur in birds during development,for example due to sexual differences in energy requirement and/or environmental sensitivity,or the effects of sex hormones or sex differences in the expression of mutations linked to sex *** extent of sex-bias in mortality may also be related to environmental conditions that influence offspring development and *** areas often provide poorer conditions for nestling development resulting in higher offspring mortality compared to natural areas,which may accelerate sex differences in offspring mortality in *** test this hypothesis,we examined the sex ratio of dead offspring in Great Tits(Parus major),using 427 samples of unhatched eggs and dead nestlings collected in two urban and two forest sites between 2013 and *** ratio of males in the whole sample of dead offspring(56.9%)was significantly higher than expected by an 1:1 ratio,and the strongest sex biases were detected in urban areas(57.6%males)and in young nestlings(<14 days old,59.0%males).However,the sex ratios of dead offspring did not differ significantly among study sites and between offspring developmental stages.29.3%of unhatched eggs contained a visible embryo,and the proportion of embryo-containing unhatched eggs did not differ significantly between urban and forest study *** results suggest male-biased offspring mortality in Great Tits,and highlight the need of large datasets to detect subtle differences between habitats and developmental stages.

关键词： Great Tit Urbanization Nestling mortality Sex related differences

Association of previously irradiated stable brain metastases with outcomes of atezolizumab-treated non-small cell lung cancer: A pooled analysis of individual patient data from three randomized trials

在线全文

学校读者我要写书评

暂无评论

Cancer Communications 2024年第2期44卷 278-281页

作者： Tiantian Guo Yue Zhou Fei Liang Zezhou Wang Vincent Bourbonne Lukas Käsmann nora Sundahl Abraham Jing-Ching Wu Jianjiao Ni Zhengfei Zhu Department of Radiation Oncology Fudan University Shanghai Cancer CenterShanghaiP.R.China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghaiP.R.China Shanghai Clinical Research Center for Radiation Oncology ShanghaiP.R.China Shanghai Key Laboratory of Radiation Oncology ShanghaiP.R.China Department of Biostatistics Zhongshan HospitalFudan UniversityShanghaiP.R.China Department of Cancer Prevention Fudan University Shanghai Cancer CenterShanghaiP.R.China Radiation Oncology Department University HospitalBrestFrance Department of Radiation Oncology University HospitalLMU MunichMunichGermany Department of Radiation Oncology AZ GroeningeKortrijkBelgium Department of Radiation Oncology Memorial Sloan Kettering Cancer CenterNew YorkNew YorkUSA Institute of Thoracic Oncology Fudan UniversityShanghaiP.R.China

Dear Editor:Brain metastasis(BM)has long been recognized as a prognostic factor associated with poor prognosis for non-small cell lung cancer(NSCLC)in the era of con-ventional chemotherapy and targeted therapy[1].In the era of immunotherapy,controversial findings have been reported regarding the prognostic significance of BM in patients with NSCLC treated with programmed death-1/programmed death-ligand 1(PD-1/PD-L1)inhibitors.

关键词： chemotherapy NSCLC metastasis death

Inhibition of autophagy rescues HT22 hippocampal neurons from erastin-induced ferroptosis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2023年第7期18卷 1548-1552页

作者： nora Hanke Abdelhaq Rami Institut für Experimentelle Neurobiologie(Anatomie Ⅱ) Klinikum der Johann Wolfgang von Goethe-UniversitätTheodor-Stern-Kai 760590 Frankfurt/MainGermany

Ferroptosis is a regulated form of cell death which is considered an oxidative iron-dependent *** lipid hydroperoxidase glutathione peroxidase 4 prevents the iron(Fe2+)-dependent formation of toxic lipid reactive oxygen *** emerging evidence indicates that inhibition of glutathione peroxidase 4 as a hallmark of ferroptosis in many cancer cell lines,the involvement of this biochemical pathway in neuronal death remains largely ***,we investigate,first whether the ferroptosis key players are involved in the neuronal cell death induced by *** second objective was to examine whether there is a cross talk between ferroptosis and *** third main was to address neuron response to erastin,with a special focus on ferritin and nuclear receptor coactivator 4-mediated *** test this in neurons,erastin(0.5-8μM)was applied to hippocampal HT22 neurons for 16 *** addition,cells were cultured with the autophagy inhibitor,3-methyladenin(10 mM)and/or ferroptosis inhibitors,ferrostatin 1(10-20μM)or deferoxamine(10-200μM)before exposure to *** this study,we demonstrated by immunofluorescence and western blot analysis,that erastin downregulates dramatically the expression of glutathione peroxidase 4,the sodium-independent cystine-glutamate antiporter and nuclear receptor coactivator *** protein levels of ferritin and mitochondrial ferritin in HT22 hippocampal neurons did not remarkably change following erastin *** addition,we demonstrated that not only the ferroptosis inhibitor,ferrostatin1/deferoxamine abrogated the ferroptotic cell death induced by erastin in hippocampal HT22 neurons,but also the potent autophagy inhibitor,*** conclude that(1)erastin-induced ferroptosis in hippocampal HT22 neurons,despite reduced nuclear receptor coactivator 4 levels,(2)that either nuclear receptor coactivator 4-mediated ferritinophagy does not occur or is of secondary importance in this model,(3)that ferroptos

关键词： erastin ferritin ferritinophagy ferroptosis glutathione peroxidase 4 HT22 neurons nuclear receptor coactivator 4

A particle shape-based segmentation method to characterize spray dried materials by X-Ray microtomography

在线全文

学校读者我要写书评

暂无评论

Particuology 2023年第10期81卷 119-127页

作者： nora Alina Ruprecht Heike Teichmann Reinhard Kohlus University of Hohenheim Institute of Food Science and BiotechnologyDepartment of Process Engineering and Food PowdersGarbenstr.2570599StuttgartGermany

For accurate description of particle structure,single particle properties are required so that the properties of interest can be expressed as distributed parameters.X-Ray microtomography of the powder bed with subsequent particle separation can be used for this *** this paper,a new algorithm for X-Ray microtomography images of spray dried particles was introduced since standard methods tend to fail if the particle size distribution is *** algorithm is based on 2D shape classification and subsequent 3D reconstitution of the particle using only a shape classifier as free *** proposed algorithm was validated *** the algorithm,single particle porosities were obtained,which ranged from 0 to 70%.Prerequisites for the application of the algorithm are that a shape classifier can be set and that the 3D shape is regular.

关键词： Spray drying Particle structure X-Ray microtomography Segmentation algorithm Porosity distribution

Abiotic and biotic constituents of oil sands process-affected waters

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2023年第5期127卷 169-186页

作者： nora A.S.Hussain James L.Stafford Department of Biological Sciences University of AlbertaEdmontonAlberta T6G 2N8Canada

The oil sands in Northern Alberta are the largest oil sands in the world,providing an important economic resource for the Canadian energy *** extraction of petroleum in the oil sands begins with the addition of hot water to the bituminous sediment,generating oil sands process-affected water(OSPW),which is acutely toxic to *** of litres of OSPW are stored on oil sands mining leased sites in man-made reservoirs called tailings *** the volume of OSPW increases,concerns arise regarding the reclamation and eventual release of this water back into the *** is composed of a complex and heterogeneous mix of components that vary based on factors such as company extraction techniques,age of the water,location,and bitumen ore ***,the effective remediation of OSPW requires the consideration of abiotic and biotic constituents within it to understand short and long term effects of treatments *** review summarizes selected chemicals and organisms in these waters and their interactions to provide a holistic perspective on the physiochemical and microbial dynamics underpinning OSPW.

关键词： OSPW toxicants Reclamation Tailings ponds Remediation Microbial AOPs Bioremediation