نتایج جستجو برای: c58

تعداد نتایج: 309  

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1999
J S Mogil S M Adhikari

Recent experiments in our laboratory have revealed a genetic correlation of the sensitivity of inbred mouse strains to different assays of nociception using noxious heat stimuli. An open question is whether the property of the noxious stimulus underlying the genetic correlation is heat specifically or simply a temperature (hot or cold) in the noxious range. The existing electrophysiological, ps...

2016
Jianqing Fan Yuan Ke Yuan Liao

We provide an econometric analysis for the factor models when the latent factors can be explained partially by several observed explanatory proxies. In financial factor models for instance, the unknown factors can be reasonably well predicted by a few observable proxies, such as the Fama-French factors. In diffusion index forecasts, identified factors are strongly related to several directly me...

Journal: :J. Multivariate Analysis 2016
Taras Bodnar Markus Reiß

In the paper, we suggest three tests on the validity of a factor model which can be applied for both, small-dimensional and large-dimensional data. The exact and asymptotic distributions of the resulting test statistics are derived under classical and highdimensional asymptotic regimes. It is shown that the critical values of the proposed tests can be calibrated empirically by generating a samp...

2013
Istvan Barra Lennart Hoogerheide Siem Jan Koopman André Lucas István Barra

We propose a new methodology for the Bayesian analysis of nonlinear nonGaussian state space models with a Gaussian time-varying signal, where the signal is a function of a possibly high-dimensional state vector. The novelty of our approach is the development of proposal densities for the joint posterior density of parameter and state vectors: a mixture of Student’s t-densities as the marginal p...

In this study, for the first time, we model gasoline consumption behavior in Iran using the long-term memory model of the autoregressive fractionally integrated moving average and non-linear Markov-Switching regime change model. Initially, the long-term memory feature of the ARFIMA model is investigated using the data from 1927 to 2017. The results indicate that the time series studied has a lo...

Journal: :Journal of bacteriology 2006
Chao Wang Hai-Bao Zhang Guozhou Chen Lingling Chen Lian-Hui Zhang

Agrobacterium tumefaciens wild-type strains have a unique quorum-sensing (QS)-dependent Ti plasmid conjugative transfer phenotype in which QS signaling is activated by corresponding conjugative opine inducers. Strain K588, with a nopaline-type chromosomal background harboring an octopine-type Ti plasmid, however, is a spontaneous mutant displaying a constitutive phenotype in QS. In this study, ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - پژوهشکده بیوتکنولوژی 1391

در سال های اخیر، با پیشرفت های که در زیست شناسی مولکولی، مهندسی ژنتیک و کشت بافت گیاهی به دست آمده، روش های جدید و کاراتری برای غلبه به محدودیت های به نژادی گیاهی سنتی در ایجاد گیاهان مقاوم به بیماری بوجود آمده است. در این روش ها با جداسازی و انتقال ژن پروتئین های ضدمیکروبی، می توان گیاهان تراریخت مقاوم به بیماری تولید کرد. علاوه بر این می توان این ترکیبات ضدمیکروبی تولید شده در گیاهان را خالص ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2006
Pu Liu Eugene W Nester

Agrobacterium tumefaciens induces crown gall tumors by transferring a piece of its tumor-inducing plasmid into plant cells. This transferred DNA encodes the synthesis of indole acetic acid (IAA) and cytokinin, and their overproduction results in tumor formation. The transfer is initiated by a two-component regulatory system, VirA/G recognizing plant signal molecules in the plant rhizosphere and...

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