检索结果-南通市图书馆

Aquaculture and Fisheries 2020年第2期5卷 86-91页

作者： emmanuel O.Ogueji Stanley C.Iheanacho christian e.mbah Abubakar J.Yaji Uchenna ezemagu Department of Fisheries and Aquaculture Alex Ekwueme Federal University Ndufu Alike IkwoAbakaliki482131Nigeria Department of Zoology and environmental Biology University of Nigeria NsukkaEnugu410110Nigeria Department of Zoology Ahmadu Bello University ZariaZaria810241Nigeria Department of Fisheries Modibbo Adama University of Technology YolaYola640101Nigeria Department of Anatomy Alex Ekwueme Federal University Ndufu Alike IkwoAbakaliki482131Nigeria

The need for replacement of highly priced soybean meal(SM)in fish diets with unconventional plant materials has become imperative for the sustainability of aquaculture *** study addressed the effect of replacing SM with discarded cashew nut meal(DCNM)on the liver and stomach histology in African catfish(Clarias gariepinus).Total 90 juveniles(24.83±1.52 g)were fed DCNM based diets,inclusion level of 0,50%and 100%.Fish were fed twice daily(8:00 a.m.–4:00 p.m.)at 5%body weight for 56 *** histology of liver and the stomach were ***-morphological changes of the liver tissue were moderate at 100%DCNM fed fish compared to 50%DCNM and control(0 DCNM).Photomicrograph of stomach of 50%DCNM fed fish showed normal histo-morphological features,while moderate to severe histological distortions were observed in the stomach of 100%DCNM fed *** findings of the present study showed that partial(50%)replacement of SM with DCNM had no adverse nutritional consequence while total(100%)replacement of SM with DCNM in the diet of *** resulted to moderate histological distortions of the liver and stomach.

关键词： African catfish Discarded cashew nut meal Alternative protein source Histology Liver Stomach

Many faces of neuronal activity manipulation in Drosophila

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 2025年第9期20卷 2574-2576页

作者： Amber Krebs Steffen Kautzmann christian Klämbt Institut für Neuro-und Verhaltensbiologie MünsterGermany

Animals exhibit complex responses to external and internal *** information is computed by interconnected neurons that express numerous ion channels,which modulate the neuronal membrane *** can neuronal activity orchestrate complex motor patterns or allow learning from previous experience?To answer such questions,we need the ability not only to record,but also to modulate neuronal activity in both space(e.g.,neuronal subsets)and time.

关键词： manipulation potential. neuronal

effect of particle Froude number on sub-grid effective drag,filtered and residual stresses in fluidized gas-particle flows

在线全文

学校读者我要写书评

暂无评论

Particuology 2024年第12期95卷 36-48页

作者： christian C.Milioli Fernando e.Milioli Department of Mechanical engineering School of Engineering of São CarlosUniversity of São Paulo13566-590São CarlosSPBrazil

Sub-grid effective drag,filtered and residual stresses in the meso-scale of gas-particle fluidized flows are intrinsically affected by underlying micro-scale conditions as well as non-local effects related to macro-scale *** this work we applied microscopic two-fluid modeling to experiment with particle Froude number in order to evaluate the impact of this micro-scale condition over the concerning meso-scale derived sub-grid *** performed highly resolved simulations in periodic domains for particle Froude numbers from 12.21 to 799.22,for a wide range of macro-scale *** were filtered and classified by ranges of meso-scale markers for the various particle Froude *** particle Froude number was found to considerably affect the structural refinement of the heterogeneous flow fields thereby directly impacting effective drag,filtered and residual *** of those parameters showed systematic behaviors in relation to particle Froude number,thereby providing sound data for new sub-grid modeling propositions.

关键词： Fluidization Gas-particle flows Two-fluid model Sub-grid analysis Multiscale analysis

Redundancy in Biology and Robotics:Potential of Kinematic Redundancy and its Interplay with elasticity

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 Bionic engineering 2020年第4期17卷 695-707页

作者： Tom Verstraten christian Schumacher Rapha(e)l Furnémont Andre Seyfarth Philipp Beckerle Robotics and Multibody Mechanics Research Group(R&MM) Vrije Universiteit Brussel and Flanders MakePleinlaan 21050 ElseneBelgium Institute of Sports Science TU DarmstadtMagdalenenstraβe 2764289 DarmstadtGermany elastic Lightweight Robotics Group Robotics Research InstituteTU DortmundOtto-Hahn-Straβe 844227 DortmundGermany Institüt fur Mechatronische Systeme im Maschinenbau TU DarmstadtOtto-Berndt-Straβe 264287 DarmstadtGermany

Redundancy facilitates some of the most remarkable capabilities of humans,and is therefore omni-present in our *** relationship between redundancy in robotics and biology is investigated in detail on the Series elastic Dual-Motor Actuator(SeDMA),an actuator inspired by the kinematic redundancy exhibited by *** actuator consists of two motors coupled to a single spring at the *** a system has a redundant degree of freedom,which can be exploited to optimize aspects such as accuracy,impedance,fault-tolerance and energy *** test its potential for human-like motions,the SeDMA actuator is implemented in a hopping *** on a physical demonstrator show that the robot's movement patterns resemble human squat *** conclude that robots with bio-inspired actuator designs facilitate human-like movement,although current technical limitations may prevent them from reaching the same dynamic and energetic performance.

关键词： bioinspired redundant actuation series elastic actuation hopping robots energy efficiency human physiology

Can active late-type stars contribute to the Galactic lithium abundance?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2020年第7期20卷 127-133页

作者： Darnell e.Kelly Damian J.christian Mihalis Mathioudakis Darko Jevremovi′c Department of Physics and Astronomy California State UniversityNorthridgeCA 91330-8268USA Astrophysics Research Centre School of Mathematics and PhysicsQueen’s University BelfastBelfast BT71NNUK Astronomical Observatory Volgina 711060 BelgradeSerbia

Lithium abundances in our Galaxy and especially 6 Li abundances provide important constraints on our understanding of Big Bang Nucleosynthesis(BBNS),stellar evolution and the creation of light elements by cosmic rays in the ISM.~6 Li has been detected in energetic solar events,one chromospherically active binary and several dwarf halo *** our work on active late-type stars with high lithium abundances,we expand our study to consider if the flare origin of lithium created by spallation can contribute significantly to the Galactic abundance of *** previously derived ~6 Li/~7 Li=0.030 ± 0.010 for active K dwarf GJ 117 using VLT UVeS *** find^6 Li/~7 Li ratios of 0.02 and 0.10 for two other stars in our sample,GJ 182 and eUVe J1145-55.3 A,*** that these later type,active stars have significant flare rates and stellar winds,we have estimated the contribution of these stars to the Galactic lithium *** that K and M stars comprise over 84% of our Galaxy and that many of these can have significant stellar winds,we conclude that spallation in stellar flares can contribute 1% and up to 5% of the Galactic lithium abundance.

关键词： stars:abundances stars:activity Galaxy:abundances

Long-term survivor of metastatic squamous-cell head and neck carcinoma with occult primary after cetuximab-based chemotherapy:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第24期9卷 7092-7098页

作者： Christina Große-Thie Claudia Maletzki christian Junghanss Kathie Schmidt Department of Medicine Clinic III-HematologyOncologyPalliative MedicineRostock University Medical CenterRostock 18057Germany

BACKGROUND Cancer of unknown primary(CUP)is a histological proven malignant tumor whose origin cannot be detected despite careful *** cervical lymph node metastases in CUP(80%)will originate from head and neck sites,and 15%show infiltration of squamous carcinoma *** survival rates of CUP are poor:The 5-year-survival rate ranges from 10%to 15%.First-line treatment recommendation for advanced,inoperable squamous cell carcinoma of head/neck(HNSCC)was cetuximab plus platinum-fluorouracil chemotherapy until recently,when checkpoint inhibitors proved clinically beneficial *** SUMMARY Here,we report a case of a 42-year-old female patient with cervical and abdominal lymph node and distant bone metastases of an occult primary of the head and neck(squamous cell carcinoma,human papillomavirus positive).The cancer was diagnosed during pregnancy 10 years ago,and after giving birth,the patient was treated with cetuximab plus platinum-fluorouracil chemotherapy achieving complete remission(CR).CR lasted 26 mo when new metastases(abdominal lymph node,lumbar vertebral body)*** manifestations were *** then on,the patient has not received any further treatment,and her disease has remained *** years after the initial cancer diagnosis,the patient is still alive and in good health,representing an exceptional case of *** This case illustrates the exceptional clinical course and benefits of combined therapy approaches in advanced metastatic HNSCC with occult primary.

关键词： Squamous cell carcinoma of the head and neck Cancer of unknown primary Long-term survival Cetuximab Metastases Case report

Combinatorial Performance Mapping of Near-NMC111 Li-ion Cathodes

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 Materiomics 2022年第2期8卷 437-445页

作者： Daniel Commandeur christian Sabado Thomas e.Ashton Jawwad A.Darr Department of Chemistry University College London20 Gordon StreetLondonWC1H 0AJUK

A combinatorial library of twenty-three,phase pure,near-NMC111(LiNi_(0.33) Mn_(0.33)Co_(0,33)O_(2))composi-tions were synthesised and their electrochemical performance,was mapped(in lithium ion half-cells).each of the 23 compositions was made in series,using a two-step process of 1)a rapid initial contin-uous hydrothermal precipitation,followed by 2)solid state *** 23 lithiated NMC samples were then subjected to analytical methods including electron microscopy(selected samples),Powder X-ray Diffraction and electrochemical tests in half cell Li-ion configurations versus Li metal.A sample with a Ni:Mn:Co(NMC)ratio of 39:28:33,revealed a specific capacity of 150 mA h g^(-1) at a C/20 rate,which was 63 and 43% greater capacity than NMC111 and NMC433 samples produced in this work,*** sample with NMC ratio 47:25:28,showed the best capacity retention characteristics,retaining 70%of its C/20 capacity at 1C,after 40 *** analysis of all the samples by cyclic voltammetry and elec-trochemical impedance spectroscopy,allowed compositional mapping of diffusion ***,the mapping data revealed a gradual change of properties across compositional space,which has vali-dated our combinatorial approach and allowed identification of the optimum performing near-NMC111 cathode materials.

关键词： Li-ion Batteries Li-ion Cathode NMC Combinatorial Continuous hydrothermal flow synthesis Rate capability

Integrating geometallurgical ball mill throughput predictions into short-term stochastic production scheduling in mining complexes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2023年第2期33卷 185-199页

作者： christian Both Roussos Dimitrakopoulos COSMO–Stochastic Mine Planning Laboratory Department of Mining and Materials EngineeringMcGill UniversityMontreal H3A 0E8Canada

This article presents a novel approach to integrate a throughput prediction model for the ball mill into short-term stochastic production scheduling in mining *** datasets for the throughput prediction model include penetration rates from blast hole drilling(measurement while drilling),geological domains,material types,rock density,and throughput rates of the operating mill,offering an accessible and cost-effective method compared to other geometallurgical ***,the comminution behavior of the orebody was geostatistically simulated by building additive hardness proportions from penetration rates.A regression model was constructed to predict throughput rates as a function of blended rock properties,which are informed by a material tracking approach in the mining ***,the throughput prediction model was integrated into a stochastic optimization model for short-term production *** way,common shortfalls of existing geometallurgical throughput prediction models,that typically ignore the non-additive nature of hardness and are not designed to interact with mine production scheduling,are overcome.A case study at the Tropicana Mining Complex shows that throughput can be predicted with an error less than 30 t/h and a correlation coefficient of up to *** integrating the prediction model and new stochastic components into optimization,the production schedule achieves weekly planned production reliably because scheduled materials match with the predicted performance of the *** to optimization using conventional mill tonnage constraints reveal that expected production shortfalls of up to 7%per period can be mitigated this way.

关键词： Geometallurgy Stochastic optimization Short-term open pit mine production scheduling Measurement while drilling Non-additivity Hardness

Is there a way out for the 2014 ebola outbreak in Western Africa?

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2015年第10期8卷 757-762页

作者： Angelo Andreas christian Binoun A egom Peter Kruzliak emmanuel e.egom University of Toronto Scarborough Campus University of Ndjamena Faculty of Medicine International Clinical Research Center St.Anne's University Hospital and Masaryk University egom Clinical and Translational Research Services

The 2014 ebola outbreak in West Africa,primarily affecting *** Leone,and Liberia,has exceeded all previous ebola outbreaks in the number of cases and in international *** infections only occur frequently in Western Africa,the virus has the potential to spread globally and is classified as a category A pathogen that could be misused as a bioterrorism *** review aims(i) to discuss the latest data to aid our current recommendations for the prevention and control of the ebola vims infection,(ii) to review its pathophysiology as well as offering insights on the most current data available about ebola vaccine progress and potential use.

关键词： ebola virus Infection Prevention Control

Probabilistic approach for open pit bench slope stability analysis——A mine case study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2019年第4期29卷 629-640页

作者： christian Obregon Hani Mitri Department of Mining and Materials engineering McGill University

The geotechnical slope design of an open pit wall starts at the bench scale *** this scale,the rock slope stability is governed primarily by the geological discontinuities within the rock mass and as a result,structurally-controlled failures(***,wedge or toppling)are most likely to *** probabilistic approach offers a major advantage over the traditional deterministic method in that it accounts for the different degrees of variability and uncertainty often encountered in rock *** paper presents a bench slope stability assessment for an open pit mine in Peru using a probabilistic-based approach by coupling a kinematic analysis based on stereographic projection techniques followed by a kinetic analysis by means of the limit equilibrium ***,these two probabilities are combined to provide an overall measure of the probability of failure(PoF)of the bench slope *** case study is characterized by significant scatter in the geometrical and mechanical properties of the *** surface mapping was conducted at 36 different sites following the ISRM suggested *** direct shear tests were carried *** is shown that by combining field and laboratory measurements and engineering judgment,the probability density functions(PDF)of the discontinuity parameters can be *** are then used in a Monte Carlo simulation process to compute both kinematic and kinetic probabilities of *** overall probability of failure aims to provide the design engineer with a tool to critically evaluate the bench performance from a geotechnical risk perspective and to provide a basis for future bench design optimization.

关键词： Mine safety Rock slope stability Kinematic analysis Probability of failure Limit equilibrium analysis Case study