|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Multi-length scale modeling of carburization,martensitic microstructure evolution and fatigue properties of steel gears显示文摘Multi-length scale modeling is performed to(i)predict the carburized case depth of SAE8620 steel gears by solving the Fick’s second law of diffusion,(ii)model the martensitic microstructure evolution in a grain inside the carburized case as well as to study the effect of stress cycling on retained austenite(RA)and martensite using a 3D phase-field model,(iii)simulate the effect of carburization and different RA contents on macroscale fatigue behavior of SAE8620 steel spur gear using the finite element method.The diffusion model predicts that the case depth increases with increasing heat treatment time and temperature.The phase-field simulations show that RA can transform to martensite during fatigue loading,where the extent of the transformation will depend on the type of stresses applied,i.e.stresses in a high stress regime or low stress regime of fatigue loading.Reverse transformation of martensite to austenite is also observed in low RA sample under high stress regime.The macroscale simulations show that the carburized case with high RA gives rise to better fatigue life compared to that with low RA. | Edward Charles Henry Crawford O’Brien Hemantha Kumar Yeddu | 2020 | Journal of Materials Science & Technology2020，47，14： | 5 |
| 2 | Geoclimatic factors influence the population genetic connectivity of Incarvillea arguta(Bignoniaceae)in the Himalaya-Hengduan Mountains biodiversity hotspot显示文摘Geoclimatic factors related to the uplift of the Himalaya and the Quaternary climatic oscillations in fluence the population genetic connectivity in the Himalaya-Hengduan Mountains(HHM)biodiversity hotspot.Therefore,to explore the relative roles played by these two factors,we examined the population dynamics and dispersal corridors of Incarvillea arguta(Royle)Royle incorporating ensemble species distribution modelling(SDM).Thirty-seven populations were genotyped using plastid chloroplast DNA and low copy nuclear gene(ncpCS)sequences.Phylogeographic analysis was carried out to reveal the genetic structure and lineage differentiation.Ensemble SDMs were carried out for distributional change in the last glacial maximum,present,and future.Finally,the least cost path method was used to trace out possible dispersal corridors.The haplotypes were divided into four clades with strong geographical structure.The late Miocene origin of I.arguta in the western Himalaya ca.7.92 Ma indicates lineage diversification related to the uplift of the HHM.The variability in habitat connectivity revealed by SDM is due to change in suitability since the Pleistocene.A putative dispersal corridor was detected along the drainage systems and river valleys,with strong support in the eastern Hengduan Mountains group.Our results support the signature of geoclimatic influence on population genetic connectivity of I.arguta in the HHM.We proposed that the major drainage systems might have assisted the rapid dispersal of isolated riverine plant species I.arguta in the HHM.The population genetic connectivity,using the fine-tuned ensemble SDMs,enables scientists and policymakers to develop conservation strategies for the species gene pool in the HHM biodiversity hotspots. | Santosh Kumar Rana Dong Luo Hum Kala Rana Alexander Robert O'Neill Hang Sun | 2021 | Journal of Systematics and Evolution2021，59，1： | 3 |
| 3 | Effect of K2O addition on crystallization and microstructural behaviour of the strontium titanate-borosilicate glass-ceramic system显示文摘 | THAKUR O P KUMAR Devendra PARKASH Om etal | 1995 | Mater Lett1995，23，： | 2 |
| 4 | Mycogenic Silver Nanoparticles From Endophytic Trichoderma atroviride with Antimicrobial Activity显示文摘There is an increasing interest in developing nanoparticles with diverse biologic activities.To this end,we prepared 10 to 15 nm silver nanoparticles(AgNP)from native isolates of Trichoderma atroviride.Within this study,endophytic fungi hosted four medicinal plants in Saint Katherine Protectorate,South Sinai,Egypt have been isolated by surface sterilization technique on four isolation media.Ten species,based on their frequency of occurrence,out of twenty recovered taxa were tested for their capability to synthesize extracellular AgNPs.Trichoderma atroviride hosted Chiliadenus montanus was found to be the best candidate for the production of mycogenic AgNPs among all examined species.The mycosynthesized AgNPs were compared with chemically synthesized and characterized using Ultraviolet-visible(UV-vis)spectroscopy,Raman spectroscopy,X-ray diffraction(XRD)and high-resolution transmission electron microscopy(HRTEM)techniques.The HRTEM result showed the distribution of spherical AgNPs ranging from 10 to 15 nm.Trichoderma atroviride isolate was subjected to sequencing for confirmation of phenotypic identification.The internal transcribed spacer(ITS)1-5.8 s-ITS2 rDNA sequences obtained were compared with those deposited in the GenBank Database and registered with accession number MH283876 in the NCBI Database.Antibacterial,anticandidal and antifungal effects of chemically and mycosynthesized AgNPs were examined at various concentrations in vitro against six pathogenic bacteria and 4 pathogenic fungi by agar well diffusion technique.Standard antibiotics;Gentamicin,Amoxicillin,Clotrimazole,and Nystatin at 5μg/disk were taken as positive controls,while 5%DMSO was used as the negative control.Our data revealed that the application of mycogenic AgNPs at a concentration of 100 ppm resulted in maximum inhibition of pathogenic bacteria and fungi.These data suggest that AgNPs from native isolates of Trichoderma atroviride(MH283876)offer a source of rapid synthesis of eco-friendly,economical biomaterials that show antimicrobial activities. | Ahmed Abdel-Azeem Amr A.Nada Anthonia O’Donovan Vijay Kumar Thakur Amr Elkelish | 2020 | Journal of Renewable Materials2020，8，2： | 2 |
| 5 | Analytic hierarchy process: an overview of applications显示文摘 | Vaidya O S Kumar S | 2006 | European Journal of Operational Research2006，169，： | 1 |
| 6 | Clinical review : myocardial depres- sion in sepsis and septic shock显示文摘 | Court O Kumar A Parrillo J | 2000 | CritCare2000，6，3： | 1 |
| 7 | Analytic hierarchy process: an overview of applieations显示文摘 | Vaidya O S Kumar S | 2006 | European Journal of Operational Research2006，169，： | 1 |
| 8 | Sonochemical synthesis and characterization of Ag2S/PVA and CuS/PVA nanocomposite显示文摘 | Kumar R V Palchik O Koltypin Y Diamant Y Gedanken A | 2002 | Ultrasonics Sonochemistry2002，9，2： | 1 |
| 9 | Differential Learning and Interaction in Alliance Dynamics:A Process and Outcome Discrepancy Model显示文摘 | Kumar R Nti K O | 1998 | Organization Science1998，9，： | 1 |
| 10 | Synthesis and antifungal activity of some neroxyl-2-(1-phenyl-3-aryl-4-pyrazolyl) chromones显示文摘 | Prakash O Kumar R Parkash V | 2008 | Eur J Med Chem2008，43，： | 1 |
| 11 | Estimating and mapping grass phos phorus concentration in an African savanna using hyperspectral image data显示文摘 | Mutanga O Kumar L | 2007 | International Journal of Remote Sensing2007，28，21： | 1 |
| 12 | Kvalualion of facial m'rve fol-lowing open redutrlion and internal fixation of subcondylar fracturethrough retromandibular transparotid approach显示文摘 | Hhutia O Kumar L Jose A | 2014 | Br J Oral Max-illofac Surg2014，52，3： | 1 |
| 13 | Analytic hierarchy process: An overview of applications 显示文摘 | VAIDYA O S KUMAR S | 2006 | European Journal of Operational Research2006，169，1： | 1 |
| 14 | Synthesis of chalcone derivatives on steroidal framework and their anticancer activities显示文摘 | Saxena H O Faridi U Kumar J | | 0，，13： | 1 |
| 15 | Wear resistance of a functionally-graded aluminum matrix composite显示文摘 | HUMBERTO M Z MARCELO S O KUMAR S | | 0，，01： | 1 |
| 16 | Recent developments in fetal medicine显示文摘 | KumarS O'Brien A | | 0，，： | 1 |
| 17 | Clinical review: myocardial depression in sepsis and septic shock 显示文摘 | Court O Kumar A Parrillo J | 2000 | Crit Care2000，6，3： | 1 |
| 18 | Riboflavin and UV-light based pathogen reduction : extent and consequence of DNA damage at the molecular level显示文摘 | Kumar V Lockerbie O Keil SD et at | 2004 | Photochem Photobiol2004，80，1： | 1 |
| 19 | Small molecule detection in solution via the size contraction response of aptamer functionalized nanoparticles显示文摘 | Alsager O A Kumar S Willmott G R | 2014 | Biosensors & Bioelectronics2014，57，： | 1 |
| 20 | Entrapment of α-amylase in alginate beads:Single step protocol for purification and thermal stabilization显示文摘 | KUMAR R S S VISHWANATH K S SRIDEVI A S et o/ | 2006 | Process Biochemistry2006，41，11： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员