Change Templates
Mostrando 1-12 de 52 artigos, teses e dissertações.
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1. Lentes de gelatina
Resumo Neste trabalho apresentamos um aparato de baixo custo, lúdico e de fácil acesso para experimentação na área de óptica geométrica. A simplicidade da montagem e a facilidade do manuseio favorecem a aplicação deste projeto, que se propõe a construir lentes esféricas com gelatina comestível. Com o auxilio de gabaritos de papel, feitos no forma
Rev. Bras. Ensino Fís.. Publicado em: 11/11/2019
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2. ChangeLedge : change design and planning in networked systems based on reuse of knowledge and automation / ChangeLedge: projeto e planejamento de mudanças em sistemas de rede com base no reuso de conhecimento e automação
A gerência adequada de recursos e serviços de Tecnologia da Informação (TI) se tornou imperativa para o sucesso de organizações modernas. A Biblioteca de Infraestrutura de Tecnologia da Informação (Information Technology Infrastructure Library, ITIL) representa, nesse contexto, o framework mais popular para ajudar a alcançar esse fim. Para lidar com
Publicado em: 2010
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3. Construção de nanoestruturas e caracterização por SEM e RBS / Construction of nanostructures and characterization by SEM and RBS
Nanostructured materials have properties that make these materials different from their counterpart in higher scale that opens many novel possibilities and technical applications. One of the main issues in nanotechnology is to develop suitable methods for the analysis and characterization of nanostructures. This works studies the use of Rutherford Backscatte
Publicado em: 2008
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4. Avaliação da posição do condilo na fossa mandibular e dos movimentos mandibulares antes e durante a utilização de pistas deslizantes de nobilo
Despite the efforts of toa many researchers to explain the painful syndrome of the temporomandidular joint (TMJ), the comprehension of its etiology has some lacks and there is a great disagreement among different opinions, with reflection on treatment modalities. This study does not focus only on discussion regarding etiology and epidemiology of temporomandi
Publicado em: 1999
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5. Effect of using templates on the information included in histopathology reports on specimens of uterine cervix taken by loop excision of the transformation zone.
AIM: To determine the change in information relayed from histopathologists to clinicians by using templates for reporting specimens of uterine cervix sampled by loop excision of the transformation zone (LETZ). METHODS: Minimum datasets for the information required from LETZ specimens received from the colposcopy clinic, Royal Infirmary, Edinburgh, were incor
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6. Lambda repressor turns off transcription of its own gene.
We report transcription in vitro of the lambda repressor gene, cI, using specific restriction endonuclease fragments as templates. This transcription is repressed by lambda repressor. Moreover, we report the sequence change caused by a cI promoter mutation. This change is located between two repressor binding sites in the rightward operator (OR). Transcripti
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7. The adenovirus major late promoter TATA box and initiation site are both necessary for transcription in vitro.
Mutagenized DNA templates and HeLa whole cell extracts were used to study the effects of promoter-specific base changes on in vitro transcription. DNA templates where the initiating adenine (+1) was changed to thymidine (AT+1) in the adenovirus 2 major late transcription unit were transcribed with 50% efficiency of the unaltered template. We have described a
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8. Interaction of DNA methyltransferase with aminofluorene and N-acetylaminofluorene modified poly(dC-dG).
Poly(dC-dG) was reacted in vitro to yield templates containing similar amounts of aminofluorene (AF) or acetylaminofluorene (AAF) adducts. These modified poly(dC-dG) templates were tested in an in vitro DNA methylation system utilizing 1500-fold purified rat liver methyltransferase (DMase) to compare and quantitate the effects of these adducts on the kinetic
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9. Site-specific mutagenesis using asymmetric polymerase chain reaction and a single mutant primer.
A method is described for preparing site-specific mutants using a polymerase chain reaction (PCR) based protocol. The protocol requires a single mutant primer, and has been used to introduce mutations into DNA fragments ranging in size from 200 bp to 1569 bp in length in the GM-CSF, beta-actin, human growth hormone and erythropoietin genes. Sequence analysis
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10. Double-stranded DNA templates can induce alpha-helical conformation in peptides containing lysine and alanine: functional implications for leucine zipper and helix-loop-helix transcription factors.
Transcription factors of the basic-leucine zipper and basic-helix-loop-helix families specifically recognize DNA by means of intrinsically flexible peptide domains that assume an alpha-helical conformation upon binding to target DNA sequences. We have investigated the nonspecific interactions that underlie specific DNA recognition. Circular dichroism measure
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11. Upstream domains of the Xenopus laevis rDNA promoter are revealed in microinjected oocytes.
The DNA sequences involved in promoting transcription of the Xenopus laevis rRNA genes were determined by microinjecting a series of deletion mutants into oocyte nuclei. A very small promoter region is sufficient to direct efficient transcription when templates are microinjected at high rDNA concentration, since 5'delta- 9 and 3'delta +6 templates are fully
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12. Thermal energy requirement for strand separation during transcription initiation: the effect of supercoiling and extended protein DNA contacts.
We have studied the role of extended protein DNA contacts and DNA topology on the ability of Escherichia coli RNA polymerase to form open complexes at several related promoters. The -35 region of several Escherichia coli promoters do not have homology with the consensus sequence, but still drive activator independent transcription initiation. This is due to