Results 31 to 40 of about 130,193 (229)
In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS
FEBS Letters, EarlyView.We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka +11 more
wiley +1 more source
Development of Vertical Vibration Model for Micro-Tiller by Smoothed Particle Hydrodynamics Method
AgriEngineeringA micro-tiller vibrates severely during the rotary tillage process, which may cause operators to develop white finger disease. However, for most vibration models, the acting force between the soil and the rotary cutter roll was simplified to only a ...
Xiaochan Liu +5 more
doaj +1 more source
Dependence of the Cross Section of the Cut Layer on the Specific Cutting Resistance
MATEC Web of Conferences, 2019 This article deals with the study of the effect of cross section of the cut layer of material and its influence on the specific cutting resistance. Measurement and evaluation were carried out using two machined materials, according to the designation W ...
Petrů Jana +4 more
doaj +1 more source
Development of a Cutting Fluid with Abrasive for Increasing a Tools Life During Milling
Journal of Machine Engineering, 2023 In wet cutting, lubricants are used to improve lubrication, forced cooling and chip evacuation. In particular, improving the lubrication between the tool and the chip results in a lower coefficient of friction, suppressing the tool temperature change and
Ikuo TANABE, Hiromi ISOBE
doaj +1 more source
Structural biology of ferritin nanocages
FEBS Letters, EarlyView.Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley +1 more source
CONDITIONS OF REDUCED COST FOR MACHINE-BUILDING PRODUCTS [PDF]
Fiabilitate şi Durabilitate, 2019 The mathematical model for the cost of processing of machine parts was developed and the conditions for its reduction were determined. Analytically established the existence of a minimum of the cost of processing which achieved at high cutting speeds ...
Dmytro NOVIKOV +2 more
doaj
Study on the Cutting Performance of Micro Textured Tools on Cutting Ti-6Al-4V Titanium Alloy
Micromachines, 2020 Titanium alloys are widely used in various fields, but their machinability is poor because the chip would easily adhere to the tool surface during cutting, causing poor surface quality and tool wear.
Kairui Zheng +4 more
doaj +1 more source
Structural insights into an engineered feruloyl esterase with improved MHET degrading properties
FEBS Letters, EarlyView.A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa +5 more
wiley +1 more source
Effect of MQL in high speed end-milling of Ti-6Al-4V with PVD coated tools
Nihon Kikai Gakkai ronbunshu, 2016 The high speed milling of Ti-6A-4V was investigated in order to clarify the efficiency of MQL and PVD coated tool. Cutting speed was very high 200m/min. TiAlN, TiCN, TiN, DLC and non-coated tools were used. Cooling methods were dry, wet and MQL (15mL/h).
Junsuke FUJIWARA +2 more
doaj +1 more source
Materials Research Express, 2020 Tool life of the traditional cutting tools is comparatively lesser on machining the martensitic stainless steel AISI 416 which is one of the hardest materials. In order to increase the tool life, wear-resistant nanocoatings on the cutting tools have been
Y Carlin Calaph +3 more
doaj +1 more source