检索结果-南通市图书馆

Journal of Bionic Engineering 2022年第2期19卷 547-553页

作者： Caroline fradin francois Orange Sonia Amigoni frédéric Guittard Thierry Darmanin NICE Lab UniversitéCote d’Azur06100 NiceFrance Centre Commun de Microscopie Appliquée(CCMA) UniversitéCote d’Azur06100 NiceFrance

Here,using a bioinspired approach,the soft-template electropolymerization of naphtho[2,3-b]thieno[3,4-e][1,4]dioxine(NaphDOT)was conducted in dichloromethane with different water content,and using different supporting *** role of the electrolytes in the formation of reverse micelles that constitutes the soft template is *** reverse micelles stabilized by the electrolyte and the monomer were observed by TEM and related to the various porous nanostructures of the obtained polymer *** show that the nature of the electrolyte is not only fundamental for the formation of reverse micelles and thus porous nanostructures,but also plays a huge role in the good deposition of the oligomers upon the soft *** with nanostructures such as nanotubes,nanorings or nanomembranes were realized.

关键词： Electropolymerization Soft template Reverse micelles porous nanostructures

Surface Nanostructure Control with Poly(ethylene glycol)(PEG)Spacer by Templateless Electropolymerization

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 2021年第1期18卷 65-76页

作者： Imen Bousrih Mejda El Kateb Mohammed Beji fréderic Guittard Thierry Darmanin University of Tunis El Manar Laboratory of Structural Organic ChemistryFaculty of Sciences of TunisTunis 2092Tunisia Universite Cote d'Azur NICE LabParc Valrose Nice 06100France

Controlling the shape of surface nanostructures is fundamental for various potential applications for cxamples,in water harvesting systems,liquid transportation or oil/water separation *** this paper,the creation of porous surface structures is made by a process called templateless electropolymerization,in which water(H_(2)0)is oxidizedreduced to form gas(O_(2)/H_(2))bubbles onto the surfaces and acting as soft template for the polymer *** the monomer(thieno[3,4-b]lhiophene)and the substituent(pyrene)constant,we demonstrate how a flexible PEG spacer can affect the structure *** the PEG spacer increases,the structures change frorm nanotubes(1D growth)to nanoribbons(2D)and after to hollow nanospheres(3D),which also affeets the wettig propertics.

关键词： nanostructures wettability hydrophobicity electrochemistry bioinspiration

Ways and waves of MALT1 paracaspase activation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2018年第1期15卷 8-11页

作者： Laura Israël frédéric Bornancin Novartis Institutes for BioMedical Research Novartis CampusBaselCH-4002Switzerland

Mucosa-associated lymphoid tissue lymphoma translocation protein 1(MALT1),also known as paracaspase 1,is a ubiquitous protease with homology to caspases.1 The function of MALT1 is best understood in immune cells,in particular lymphocytes,in which MALT1 controls signaling downstream of antigen receptors,for example,nuclear-factor-kappa-B(NF-κB)and mitogen-activated protein kinase *** of MALT1 paracaspase activity has been shown to require the assembly of a tripartite signaling complex termed CBM(CARD11/BCL10/MALT1),which is formed following the phosphorylation and conformational change of caspase recruitment domain 11(CARD11)that is induced by antigen-receptor stimulation.

关键词： MALT1 caspase lymphocytes

Filtered Backprojection Reconstruction with Depth-Dependent Filtering

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2010年第1期15卷 17-24页

作者： frank Dennerlein Holger Kunze frédéric Noo Siemens AG Healthcare SectorForchheim 91301Germany UCAIR Department of RadiologyUniversity of UtahSalt Lake CityUT 84108USA

A direct filtered-backprojection （FBP） reconstruction algorithm is presented for circular cone-beam computed tomography （CB-CT） that allows the filter operation to be applied efficiently with shift-variant band-pass characteristics on the kernel function. Our algorithm is derived from the ramp-filter based FBP method of Feldkamp et al. and obtained by decomposing the ramp filtering into a convolution involving the Hilbert kernel （global operation） and a subsequent differentiation operation （local operation）. The differentiation is implemented as a finite difference of two （Hilbert filtered） data samples and carried out as part of the backprojection step. The spacing between the two samples, which defines the low-pass characteristics of the filter operation, can thus be selected individually for each point in the image volume. We here define the sample spacing to follow the magnification of the divergent-beam geometry and thus obtain a novel, depth-dependent filtering algorithm for circular CB-CT. We evaluate this resulting algorithm using computer-simulated CB data and demonstrate that our algorithm yields results where spatial resolution and image noise are distributed much more uniformly over the field-of-view, compared to Feldkamp＇s approach.

关键词： computed tomography (CT) reconstruction filtered backprojection circular cone-beam CT

Lattice Boltzmann Simulation of Mixed Convection Heat Transfer in a Driven Cavity with Non-uniform Heating of the Bottom Wall

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2015年第1期63卷 91-100页

作者： Soufiene Bettaibi Ezeddine Sediki frdric Kuznik Sauro Succi UR: Rayonnement Thermique Facult des Sciences de Tunis Universit de Tunis El Manar 2092 Tunis Tunisia INSA-Lyon CETHIL F-69621 Villeurbanne France Universit de Lyon CNRS UMR5008 F-69622 Villeurbanne France Research Director IAC-CNR Rome Via dei Taurini 19 00185 Roma

The goal of this article is to study numerically the mixed convection in a differentially heated rid-driven cavity with non-uniform heating of the bottom wall. The velocity field is solved by a hybrid scheme with multiple relaxation time Lattice Boltzmann （MRT-LBM） model, while the temperature field is obtained by resolution of the energy balance equation using the finite difference method （FDM）. First, the model is checked and validated using data from the riterature. Validation of the present resuJts with those available in the literature shows a good agreement. A good efficiency in time simulation is confirmed. Thereafter, the model has been applied to mixed convection in a driven cavity with non-uniform heating wall at the fixed Grashof number Gr = 106. It is found that, the heat transfer is weakened as the Richardson number is augmented. For Gr = 106, we note the appearance of secondary vortices at different positions of the cavity corners.

关键词： lattice Boltzmann method (LBM) finite difference method (FDM) heated Lid-driven cavity mixed convection non-uniform heating wall

Global progress against cancer—challenges and opportunities

在线全文

学校读者我要写书评

暂无评论

Cancer Biology & Medicine 2013年第4期10卷 183-186页

作者： frédéric Biemar Margaret Foti American Association for Cancer Research

The last ten years have seen remarkable progress in cancer research. However, despite significant breakthroughs in the understanding, prevention, and treatment of cancer, the disease continues to affect millions of people worldwide. Cancer＇s complexity compounded with financial, policy and regulatory roadblocks has slowed the rate of progress being made against cancer. In this paper, we review a few of the most recent breakthroughs that are fueling medical advances and bringing new hope for patients affected by this devastating disease. We also address the challenges facing us and the opportunities to accelerate future progress against cancer. The efforts of the American Association for Cancer Research （AACK） to address the cancer burden already extend beyond the borders of the United States of America. The AACR is committed to increasing its efforts to stem the tide of cancer worldwide by promoting innovative programs, strategies, and initiatives for cancer researchers and all those engaged in cancer-related biomedical sciences around the world.

关键词： Collaboration prevention translational research genetics genomics epigenetics immunotherapy

Exact Efficient Handling of Interrupted Illumination in Helical Cone-Beam Computed Tomography with Arbitrary Pitch

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2010年第1期15卷 36-43页

作者： Harald Schndube Karl Stierstorfer frédéric Noo Department of Radiology University of UtahSalt Lake CityUT 84132-2140USA Siemens Healthcare 91301 ForchheimGermany

We present a theoretically-exact and stable computed tomography （CT） reconstruction algorithm that is capable of handling interrupted illumination and therefore of using all measured data at arbitrary pitch This algorithm is based on a differentiated backprojection （DBP） on M-lines. First, we discuss the problem of interrupted illumination and how it affects the DBP. Then we show that it is possible to take advantage of some properties of the DBP to compensate for the effects of interrupted illumination in a mathematically exact way. from there, we have developed an efficient algorithm which we have successfully implemented. We show encouraging preliminary results using both computer-simulated data and real data. Our results show that our method is capable of achieving a substantial reduction of image noise when decreasing the helix pitch compared with the maximum pitch case. We conclude that the proposed algorithm defines for the first time a theoretically-exact and stable reconstruction method that is capable of beneficially using all measured data at arbitrary pitch.

关键词： computed tomography (CT) theoretically-exact and stable image reconstruction differentiated backprojection M-lines redundant data

Numerical Modeling of Mass Transfer in the Interaction between River Biofilm and a Turbulent Boundary Layer

在线全文

学校读者我要写书评

暂无评论

What are the contributions of maternal and paternal traits to fecundity and offspring development?A case study in an amphibian species,the spined toad Bufo spinosus

Open Journal of Fluid Dynamics（流体动力学） 2024年第1期 1页

作者： Falilou Coundoul Evrad M. D. Ngom frédéric Y.Moulin

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

Current Zoology 2023年第5期69卷 527-534页

作者： Matthias Renoirt frédéric Angelier Marion Cheron françois Brischoux Centre d’Etudes Biologiques de Chizé CEBC UMR 7372 CNRS-La Rochelle Université79360 Villiers en BoisFrance

Assessing the determinants of reproductive success is critical but often complicated because of complex interactions between parental traits and environmental conditions occurring during several stages of a reproductive ***,we used a simplified ecological situation-an amphibian species lacking post-oviposition parental care-and a laboratory approach to investigate the relationships between parental(both maternal and paternal)phenotypes(body size and condition)and reproductive success(fecundity,egg size,embryonic and larval duration,larval and metamorphic morphology).We found significant effects of maternal phenotype on fecundity,hatching success,and tadpole size,as well as on the duration of larval ***,and more surprisingly,we also found a potential contribution of the paternal phenotype occurring during early(embryonic development duration)offspring *** our study focused on life-history traits such as body size and development duration,additional mechanisms involving physiological costs of development may well mediate the relationships between parental phenotypes and offspring *** studies are required to decipher the mechanisms underlying our findings in order to clarify the mechanistic basis of the links between parental phenotypes and offspring development.

关键词： clutch quality embryonic development larval development phenotype reproductive success

Antiseptic Efficacy of A Soap Made from Biosurfactants Isolated from Bacillus and Lactobacillus against Pathogenic Bacteria

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Microbiology 2024年第1期14卷 31-58页

作者： frédéric Yannick Okouakoua Christian Aimé Kayath Nicaise Saturnin Mokémiabeka Varelle Bervanie Ngala Elenga Digne Nedjea N’goma-Mona Ndelani Nkalla Lambi Sandra Paola Elenga Wilson Christ Dieuveil Bayakissa Malanda Rodinet Tsana Junior Patrick Sergy Bissoko1 Moïse Doria Kaya-Ongoto Duchel Jeanedvi Kinavouidi Etienne Nguimbi Laboratoire de Biologie Cellulaire et Molé culaire (BCM) Facult&eacute des Sciences et Techniques Universit&eacute Marien N’gouabi Brazzaville Congo Institut National de Recherche en Sciences Exactes et Naturelles (IRSEN) Avenue de l’Auberge Gascogne Brazzaville Congo

The aim of our study was to use a biosurfactant produced by Bacillus and Lactobacillus isolates as an antiseptic in the formulation of local soap. A total of 60 isolates were characterized by microbiological techniques (30 Bacillus and 30 Lactobacillus) and the ability to produce biosurfactants was demonstrated by a hydrocarbon emulsification index (E24). The emulsification indexes (E24) varied from 9% to 100% for Bacillus and from 33% to 100% for Lactobacillus as well. The antagonistic assay showed that biosurfactants were able to inhibit the formation of biofilms and growth of pathogens such as Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus cereus, Salmonella typhirium, Shigella boydii and Proteus mirabilis. The biosurfactant consortium (BioC) from Bacillus consortium and from Lactobacillus was able to inhibit biofilm formation and the pathogens growth. The BioC was stable to alkaline pH and the temperatures stability of Biosurfactant was ranging from 50°C to 90°C. The soap was made by the cold saponification process using one biosurfactant consortium formulated. This soap has a pH of 10 and showed good cleaning power and good foam stability. Similarly, the soap showed good antiseptic power and disinfection power against all pathogens tested. Handwashing is critical to preventing disease transmission. The persistence of pathogens in waste water was evaluated. The BioS produced showed good disinfection power against all pathogens tested. The valor of reduction on the hands and in the waste water was significantly more than compared to the control soaps used. This soap could be used in the prevention, fighting, and treatment of bacterial and viral infections.

关键词： Antiseptic Soap Biosurfactants Bacillus Lactobacillus Disinfection Pathogens bacteria