Xem 1-20 trên 100 kết quả Metal stress
  • Growth and productivity of higher plants are adversely affected by various environmental stresses which are of two main types, biotic and abiotic, depending on the source of stress. Broad range of abiotic stresses includes osmotic stress caused by drought, salinity, high or low temperatures, freezing, or flooding, as well as ionic, nutrient, or metal stresses, and others caused by mechanical factors, light, or radiation.

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  • Phototrophic green bacteria, phototrophic purple bacteria, and heliobacteria are three groups of bacteria that use anoxygenic photosynthesis. Anoxygenic phototrophs have photosynthetic pigments called bacteriochlorophylls. Bacteriochlorophyll a and b have maxima wavelength absorption at 775 nm and 790 nm, respectively in ether. Unlike oxygenic phototrophs, anoxygenic photosynthesis only functions using a single photosystem. This restricts them to cyclic electron flow only, and they are therefore unable to produce O2 from the oxidization of H2O.

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  • The introduction of the technology for bonded composite repairs of metallic airframe structures could not have come at a more opportune time. Today, many countries are facing the challenge of aging aircraft in their inventories. These airframes are degrading due to damage from fatigue cracking and corrosion. Repair with dependable techniques to restore their structural integrity is mandatory. The concept of using bonded composite materials as a means to maintain aging metallic aircraft was instituted in Australia approximately thirty years ago....

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  • Tham khảo sách 'metal fatigue:effects of small defects and nonmetallic', kỹ thuật - công nghệ, tự động hoá phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Tham khảo sách 'bonded comp repair of metallic aircraft structure volume 2a7 edited by alan', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Tham khảo sách 'metal machiningtheory and applicationsthomas childs university of leeds', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Tham khảo sách 'advances repair metallic aircraft structure volume1', kỹ thuật - công nghệ, tự động hoá phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Tham khảo sách 'smithells light metals handbook edited bye. a. brandes ceng', kỹ thuật - công nghệ, tự động hoá phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Tham khảo sách 'smithells metals reference book 7e', kỹ thuật - công nghệ, tự động hoá phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Moreover, strategies that account for predictable active management skills tilt more heavily toward mutual funds that overweight technology and energy stocks during recessions, and financial and metals stocks during expansions, indicating that business cycle variables are key to timing these industries. Remarkably, predictable skill strategies also choose individual mutual funds within the outperforming industries that, in turn, substantially outperform their industry benchmarks, even though these industry benchmarks do not account for any trading costs or fees.

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  • Tham khảo sách 'brandes & gobo b.smithells metals reference 7e', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • This workbook is intended to be a natural continuation of the CATIA V5 Workbook and covers a select group of advanced CATIA V5 work benches: Sketcher, Part Design, Assembly Design, Drafting, Generative Stress Analysis, Sheet Metal Designer, Kinematics, Prismatic Machining and Knowledgeware Tools.

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  • Plant response to reduced water availability and other abiotic stress (e.g. metals) have been analysed through changes in water absorption and transport mechanisms and also by molecular and genetic approach. A relatively new aspects of fruit nutrition are presented in order to provide the basis for the improvement of some fruit quality traits. The involvement of hormones, nutritional and proteomic plant profiles together with some structure/function of sexual components have also been addressed.

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  • Permanganate may be applied to sites as either potassium permanganate (KMnO4) or sodium permanganate (NaMnO4). Where cost dominates over engineering factors at a site, potassium permanganate is the preferred chemical form because it is more widely available, less costly, and is available in solid form, which facilitates transport and handling. Where other factors are more important, the liquid form of sodium permangante is preferable.

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  • Cataloging-in-Publication Data is on file with the Library of Congress Walsh, Ronald A. McGraw-Hill machining and metalworking handbook / Ronald A. Walsh. and Denis R. Cormier—3rd ed. p. cm. ISBN 0-07-145787-9 1. Machining—Handbooks, manuals, etc. 2. Metal-work—Handbooks, manuals, etc. I. Cormier, Denis R. II. Title. TJ1185.W35 2005 2005051055 Copyright © 2006, 1999, 1994 by The McGraw-Hill Companies, Inc. All rights reserved. Printed in the United States of America.

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  • Critical Cooling Rate at 550 °C (1020 °F) (Tc). A critical cooling rate exists for each steel composition. If the actualcooling rate in the weld metal exceeds this critical value, then hard martensitic structures may develop in the HAZ, and there is a great risk of cracking under the influence of thermal stresses in the presence of hydrogen. The best way to determine the critical cooling rate is to make a series of bead-on-plate weld passes in which all parameters, except the arc travel speed, are held constant. ...

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  • In order to predict hardening stresses quantitatively, it is necessary to consider interactions among various factors. As shown in Fig. 23, these include: (1) phase transformations, (2) latent heat, (3) thermal stress, (4) transformation stress and plasticity, (5) heat generation due to deformation, and (6) mechanically induced transformation.

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  • Depending on their structures, polyphenols (e.g. tea polyphenols) could also act by chelating prooxidant transition metal ions such as Fe2+, which are involved in reactions eliciting free radical production, including hydroxyl radicals (OH•) and alkoxyl radicals (RO•) (Dufresne & Farnworth, 2001).

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  • CARPINTERI Minimum Reinforcement in Concrete Members. ISBN: 0-08-043022-8 FUENTES E T A L Fracture Mechanics: Applications and Challenges. ISBN: 0-08-043699-4 JONES Failure Analysis Case Studies 11. ISBN: 0-08-043959-4 MACHAETAL Multiaxial Fatigue and Fracture. ISBN: 0-08-043336-7 MARQUIS & SOLIN Fatigue Design of Components. ISBN: 0-08-04331U-Y MARQUIS & SOLIN Fatigue Design and Reliability. ISBN: 0-08-043329-4 MOORE ETAL. Fracture MechanicsTesting Methods for Polymers, Adhesives and Composites.

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  • These estimates were obtained by asking survey respondents about their health insurance coverage for the 12 months prior to the interview in 2008. Respondents were asked about all kinds of private and government health insurance, including Medicare, Medicaid, BadgerCare Plus, employer-provided coverage, and insurance bought directly from an insurance agent or insurance company. Respondents were also asked about whether they were insured for all 12 months since (date one year ago), or insured for part of that time, or not insured at all since (date one year ago).

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