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Soot combustion; Ceria; Ternary mixed oxide; Cordierite coating; Diesel particulate filter

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j.urnal of Environmental Sciences 2018年第11期30卷 58-68页

作者： Leandro Fontanetti Nascimento j.liana fonseca Lima Paulo Cesar de Sousa Filho Osvaldo Antonio Serra Department of Chemistry FFCLRP University of Sao Paulo 14040-901 Ribeirao Preto Sao Paulo Brazil Institute of Chemistry Rio de Janeiro State University 20550-900 Rio de Janeiro Rio de Janeiro Brazil Institute of Chemistry Uniuersity of Campinas 13083-970 Campinas Silo Paulo Brazil Center of-Natural and Human Sciences Federal Uniuerty of ABC 09210-580 Santo Andre Sao Paulo Brazil

We report the application of a solid lanthanum-ceria-zinc catalyst in the catalytic regeneration of diesel particulate filters （DPF） in diesel engines. We synthesized a CeO2- ZnO-La2O3 （Ce-Zn-La） mixed oxide by a lactic acid-mediated sol-gel method, which efficiently coated cordierite substrates for soot capture and combustion. We studied the effects of La loading on the physicochemical and catalytic properties of Ce-Zn mixed oxide during lowtemperature soot combustion processes. We characterized the synthesized catalysts by X-ray diffraction （XRD）, Fourier-transform infrared spectroscopy （FTIR）, N2 adsorption, Raman spectroscopy, oxygen storage capacity （OSG）, and scanning and transmission electron microscopy （SEM and TEM）. Thermogravimetric and differential thermal analysis （TGA/DTA） confirmed that the catalysts effectively reduced the soot oxidation temperature. The ternary Ce-Zn-La mixed oxide catalyst with Ce/Zn/La atomic ratio of 2：1：0.5 had the highest catalytic activity and promoted soot oxidation at temperatures below 390℃. This indicated that the large number of oxygen vacancies in the catalyst structure generated oxygen species at low temperatures. Raman spectroscopy measurements revealed the presence of oxygen vacancies and lattice defects in Ce-Zn-La samples, which were key parameters concerning the stability and redox properties of the prepared catalysts.

关键词： Soot combustion Ceria Ternary mixed oxide Cordierite coating Diesel particulate filter

Epigenetics and pancreatic cancer:Pathophysiology and novel treatment aspects

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World j.urnal of Gastroenterology 2014年第24期20卷 7830-7848页

作者： daniel Neureiter Tarkan j.ger Matthias Ocker Tobias Kiesslich Institute of Pathology Paracelsus Medical University/Salzburger Landeskliniken (SALK)5020 SalzburgAustria Department of Surgery Paracelsus Medical University/Salzburger Landeskliniken (SALK)5020 SalzburgAustria Experimental Medicine Oncology Bayer Pharma AG13342 BerlinGermany Department of Internal Medicine I Paracelsus Medical University/Salzburger Landeskliniken (SALK)5020 SalzburgAustria Institute of Physiology and Pathophysiology Paracelsus Medical University5020 SalzburgAustria

An improvement in pancreatic cancer treatment represents an urgent medical goal. Late diagnosis and high intrinsic resistance to conventional chemotherapy has led to a dismal overall prognosis that has remained unchanged during the past decades. Increasing knowledge about the molecular pathogenesis of the disease has shown that genetic alterations, such as mutations of K-ras, and especially epigenetic dysregulation of tumor-associated genes, such as silencing of the tumor suppressor p16ink4a, are hallmarks of pancreatic cancer. Here, we describe genes that are commonly affected by epigenetic dysregulation in pancreatic cancer via DNA methylation, histone acetylation or miRNA (microRNA) expression, and review the implications on pancreatic cancer biology such as epithelial-mesenchymal transition, morphological pattern formation, or cancer stem cell regulation during carcinogenesis from PanIN (pancreatic intraepithelial lesions) to invasive cancer and resistance development. Epigenetic drugs, such as DNA methyltransferases or histone deactylase inhibitors, have shown promising preclinical results in pancreatic cancer and are currently in early phases of clinical development. Combinations of epigenetic drugs with established cytotoxic drugs or targeted therapies are promising approaches to improve the poor response and survival rate of pancreatic cancer patients.

关键词： Pancreatic cancer Epigenetics DNA methylation Histone modification microRNA Targeted therapy Epithelial-mesenchymal transition

Theoretical potential for low energy consumption phase change memory utilizing electrostatically-induced structural phase transitions in 2D materials

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npj.Computational Materials 2018年第1期4卷 653-661页

作者： daniel A.Rehn Yao Li Eric Pop Evan j.Reed Department of Mechanical Engineering Stanford UniversityStanfordCA 94305USA Department of Applied Physics Stanford UniversityStanfordCA 94305USA Department of Electrical Engineering Stanford UniversityStanfordCA 94305USA Department of Materials Science and Engineering Stanford UniversityStanfordCA 94305USA

Structural phase-change materials are of great importance for applications in information storage *** driven structural phase transitions are employed in phase-change memory to achieve lower programming voltages and potentially lower energy consumption than mainstream nonvolatile memory ***,the waste heat generated by such thermal mechanisms is often not optimized,and could present a limiting factor to widespread *** potential for electrostatically driven structural phase transitions has recently been predicted and subsequently reported in some two-dimensional materials,providing an athermal mechanism to dynamically control properties of these materials in a nonvolatile fashion while achieving potentially lower energy *** this work,we employ DFT-based calculations to make theoretical comparisons of the energy required to drive electrostatically-induced and thermally-induced phase *** theoretical limits in monolayer MoTe2 and thin films of Ge_(2)Sb_(2)Te_(5),we find that the energy consumption per unit volume of the electrostatically driven phase transition in monolayer MoTe2 at room temperature is 9% of the adiabatic lower limit of the thermally driven phase transition in Ge_(2)Sb_(2)Te_(5).Furthermore,experimentally reported phase change energy consumption of Ge_(2)Sb_(2)Te_(5) is 100–10,000 times larger than the adiabatic lower limit due to waste heat flow out of the material,leaving the possibility for energy consumption in monolayer MoTe2-based devices to be orders of magnitude smaller than Ge_(2)Sb_(2)Te_(5)-based devices.

关键词： transitions phase structural

Investigation of coupled cobalt-silver nanoparticle system by plan view TEM

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Progress in Natural Science:Materials International 2012年第3期22卷 186-192页

作者： daniel Fox Ruggero Verre Brendan j. O'Dowd Sunil K. Arora Colm C. Faulkner Igor V. Shvets School of Physics and CRANN Trinity College Dublin CRANN Advanced Microscopy Laboratory Trinity College Dublin

We present a transmission electron microscopy (TEM) investigation of a coupled cobalt and silver nanoparticle system. A plan view in situ lift-out method for preparing samples for TEM using the focused ion beam (FIB) microscope was used. This technique is used to prepare high quality TEM samples with site specificity in a short time and with a high success rate. We demonstrate the ability of the plan view sample preparation technique to provide information about an ordered system of nanoparticles which could not be observed using standard FIB cross sectioning of the sample. High resolution TEM and energy dispersive X-ray spectroscopy mapping of both cross sectional and plan view samples are presented, clearly showing the significant benefit of plan view TEM analysis for certain samples.

关键词： Focused ion beam Transmission electron microscopy Lift-out Co Ag Nanoparticle

Genetics : :the contiuity of life / :

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Urban invaders are not bold risk-takers: a study of 3 invasive lizards in Southern California

丛书名：美国著名医学院校教材系列

2002年

作者： Fairbanks daniel j.

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Current Zoology 2020年第6期66卷 657-665页

作者： Breanna j.Putman Gregory B.Pauly daniel T.Blumstein Department of Ecology and Evolutionary Biology University of CaliforniaLos AngelesCA90095-1606USA Department of Herpetology and Urban Nature Research Center Natural History Museum of Los Angeles County900 Exposition BoulevardLos AngelesCA90007USA Department of Biology California State UniversitySan BernardinoCA 92407USA

Biological invasions threaten biodiversity worldwide,and therefore,understanding the traits of successful invaders could mitigate their *** comm only invasive species do well in disturbed habitats,such as urban environments,and their abilities to effectively respond to disturbarices could con tribute to their ***,there are non invasive species that also do well in disturbed *** question remains whether urban invaders behave differently in urban environments than noninvaders,which could suggest an"urban-exploiting"*** Southern California,the co-occurrence of in vasive Italia n wall lizards Pod arc is siculus,brown anoles Anolis sagrei,and green anoles ***,and native western fence lizards Sceloporus occidentalis offers an opportunity to test whether invasives exhibit consistent differences in risk-taking within human-altered habitats compared with a native *** predicted that invasive lizards would exhibit more bold behavior by having shorter flight-initiation distances(FIDs)and by being found farther from a refuge(behaviors that would presumably maximize foraging in low-risk environments).Invasive populations had similar or longer FIDs,but were consistently found at distances closer to a ***,invasive lizards in urban habitats were not bolder than a native *** on nearby refuges might help species successfully invade urban habitats,and if a general pattern,may pose an added challenge in detecting or eliminating them.

关键词： antipredator boldness escape behavior invasion reptile urban ecology

Psychological, social, and sexual challenges affecting men receiving male infertility treatment: a systematic review and implications for clinical care

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Asian j.urnal of Andrology 2023年第4期25卷 448-453页

作者： Winston Wu j.stin La Kathryn M Schubach daniel Lantsberg Darren j.Katz Department of Urology Western HealthSt AlbansVIC 3021Australia Department of Urology Kaiser Permanente San Rafael Medical CenterSan RafaelCA 94903USA Men’s Health Melbourne MelbourneVIC 3000Australia Reproductive Services Unit The Royal Women’s HospitalParkvilleVIC 3052Australia Melbourne IVF East MelbourneVIC 3002Australia Department of Surgery Western PrecinctUniversity of MelbourneParkvilleVIC 3010Australia

In recent years, social research surrounding the consequences of infertility has increasingly focused on the male perspective;however, a gap exists in the understanding of men’s experiences of male infertility treatment. This review aims to synthesize theexisting evidence concerning the psychological, social, and sexual burden of male infertility treatment on men, as well as patientneeds during clinical care. A systematic search identified 12 studies that are diverse in design, setting, and methods. Psychologicalevaluations have found that urological surgery may have a lasting impact on infertility-specific stress, and treatment failure canlead to feelings of depression, grief, and inadequacy. Men tended to have an avoidant coping mechanism throughout fertilitytreatment, and their self-esteem, relationship quality, and sexual functions can be tied to outcomes of treatment. Partner bonds canbe strengthened by mutual support and enhanced communication;couple separation, however, has been noted as a predominantreason for discontinuing male infertility treatment and may be associated with difficult circumstances surrounding severe maleinfertility. Surgical treatments can affect the sexual functioning of infertile men;however, the impact of testicular sperm extractionoutcomes appears to be psychologically driven whereas the improvements after microsurgical varicocelectomy are only evident inhypogonadal men. Clinically, there is a need for better inclusion, communication, education, and resource provision, to addressreported issues of marginalization and uncertainty in men. Routine psychosocial screening in cases of severe male infertility andfollow-up in cases of surgical treatment failure are likely beneficial.

关键词： male infertility male infertility treatment patient experience patient-centered care psychosocial sexual

Techniques in Wrist and Hand Arthroscopy 1

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Distributed Secondary Control Based on Dynamic Diffusion Algorithm for Current Sharing and Average Voltage Regulation in DC Microgrids

2007年

作者： David j. Slutsky daniel j. Nagle

ISBN: (纸本)9780443066979

Enhance your skills in arthroscopic surgery - an increasingly important aspect of the treatment of a variety of traumatic and degenerative ailments of the hand. Leaders in the field describe their preferred approaches in step-by-step detail - emphasizing what outcomes you can expect - and also examine the diagnostic advantages of this precise technique. A bonus DVD features video clips of the procedures described in the book, enabling you to see these performed in real time!

关键词： Hand j.intssurgery

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j.urnal of Modern Power Systems and Clean Energy 2024年第2期12卷 597-607页

作者： Dawei Liao Fei Gao daniel j.Rogers Wentao Huang Dong Liu Houj.n Tang Department of Electrical Engineering Shanghai Jiao Tong UniversityShanghaiChina Department of Engineering Science University of OxfordOxford OX12JDU.K. IEEE

This paper introduces a distributed secondary control scheme for achieving current sharing and average voltage regulation obj.ctives in a DC *** proposed scheme employs a dynamic diffusion algorithm(DDA)instead of the consensus algorithm to enable distributed communication among *** help understand DDA,the relation of DDA and other diffusion algorithms is discussed in detail and its superiority is shown by comparison with diffusion and consensus ***,considering the discrete nature and different sampling time of the digital controller and communication network,a z-domain model of the entire DC microgrid is *** influence of communication and secondary control parameters on the system stability is *** on the established model,the tolerable communication rates are ***-time simulations conducted on the OPAL-RT platform validate the effectiveness of the proposed scheme,showcasing its advantages in terms of convergence speed and stability.

关键词： Cooperative control DC microgrid diffusion algorithm discrete-time modeling distributed secondary control