Machinery Testing
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. MODELING OF DRAFT AND ENERGY REQUIREMENTS OF A MOLDBOARD PLOW USING ARTIFICIAL NEURAL NETWORKS BASED ON TWO NOVEL VARIABLES
ABSTRACT Draft and energy requirements are the most important factors in the activities of farm machinery management owing to their role in matching the tractor with implements for different tillage operations. This study's aim was to model the draft and energy requirements of a moldboard plow based on two novel variables. The first was the soil texture inde
Eng. Agríc.. Publicado em: 2020-06
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2. Syzygium aromaticum extracts as good source of betulinic acid and potential anti-breast cancer
Syzygium aromaticum (L.) Merr. & L.M. Perry, Myrtaceae, is an evergreen tree with anticarcinogenic, antimutagenic, aphrodisiac, antimicrobial, antioxidant and antiinflammatory properties. This study aims to investigate the anti-breast cancer effect of extracts from leaves, stem and bark of S. aromaticum and to develop a method for preparation of betulinic ac
Revista Brasileira de Farmacognosia. Publicado em: 07/10/2011
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3. Desenvolvimento e caracterização de compósitos sanduíche para isolamento térmico
Um painel sanduíche consiste essencialmente em duas faces, podendo inclusive possuir reforços metálicos e um núcleo formado normalmente por um polímero celular. As faces deste tipo de painel podem estar unidas por um adesivo estrutural, ou por espuma rígida de poliuretano (PU) injetado diretamente sobre os substratos, quando a união ocorrerá naturalm
Publicado em: 2009
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4. Análise técnica e econômica de um sistema de colheita florestal / Technical and economic analysis of a forest harvest system
Hand logging systems were the first adopted, mostly, in the exploitation of native forests, with no concern with the rationalization and productivity of such activities. In Brazil, the first activities of forest harvesting were carried out along the coast, at that time of discovery, when the main traded species was brazilwood. Machine selection and developme
Publicado em: 2007
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5. Projeto, ConstruÃÃo e ValidaÃÃo de um Sistema de CompressÃo Uniaxial para Estimativa da CompactaÃÃo do Solo
The compaction of the agricultural soils has worldwide importance because of the increasing of the farm with machinery resulting in the increasing of heavy machines for cultivation system, mainly, in the developed countries. The term, soils compaction refers to the compression carried out on the non-saturated soil, during which an increase of bulk density ex
Publicado em: 2005
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6. Flagellar Length Control System: Testing a Simple Model Based on Intraflagellar Transport and Turnover
Flagellar length regulation provides a simple model system for addressing the general problem of organelle size control. Based on a systems-level analysis of flagellar dynamics, we have proposed a mechanism for flagellar length control in which length is set by the balance of continuous flagellar assembly and disassembly. The model proposes that the assembly
The American Society for Cell Biology.
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7. Lambda Excision Revisited: Testing a Model for Synapsis of Prophage Ends
Excision of lambda prophage was reexamined to test a model for prophage end synapsis. The model proposes that, during in situ prophage replication, following induction, the diverging replication forks are held together. Consequently, prophage DNA is spooled through the replication machinery, drawing the prophage ends together and facilitating synapsis. The m
American Society for Microbiology.
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8. Testing the conservation of the translational machinery over evolution in diverse environments: assaying Thermus thermophilus ribosomes and initiation factors in a coupled transcription–translation system from Escherichia coli
Ribosomes from the extreme thermophile Thermus thermophilus are capable of translation in a coupled transcription–translation system derived from Escherichia coli. At 45°C, T.thermophilus ribosomes translate at ∼25–30% of the maximal rate of E.coli ribosomes, and synthesize full-length protein. T.thermophilus and E.coli subunits can be combined to eff
Oxford University Press.
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9. Natural proteoglycan receptor analogs determine the dynamics of Opa adhesin-mediated gonococcal infection of Chang epithelial cells.
Many bacterial pathogens possess a complex machinery for the induction and/or secretion of factors that promote their uptake by mammalian cells. We searched for the molecular basis of the 60- to 90-min lag time in the interaction of Neisseria gonorrhoeae carrying the heparin-binding Opa adhesin with Chang epithelial cells. Infection assays in the presence of
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10. Stability of the Agrobacterium tumefaciens VirB10 Protein Is Modulated by Growth Temperature and Periplasmic Osmoadaption
Export of oncogenic T-DNA from the phytopathogen Agrobacterium tumefaciens is mediated by the products of the virB operon. It has recently been reported (K. J. Fullner and E. W. Nester, J. Bacteriol. 178:1498–1504, 1996) that DNA transfer does not occur at elevated temperatures; these observations correlate well with much earlier studies on the temperature
American Society for Microbiology.
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11. Regulation of Gene Expression by Internal Ribosome Entry Sites or Cryptic Promoters: the eIF4G Story
As an alternative to the scanning mechanism of initiation, the direct-internal-initiation mechanism postulates that the translational machinery assembles at the AUG start codon without traversing the entire 5′ untranslated region (5′-UTR) of the mRNA. Although the existence of internal ribosome entry sites (IRESs) in viral mRNAs is considered to be well
American Society for Microbiology.