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تراریختی گیاهان با واسطه اگروباکتریوم نه تنها وسیله ای مفید جهت وارد نمودن ژنهای خارجی در ژنوم گیاهان است بلکه اخیرا به منظور ردیابی و شناسایی ژنهای گیاهی نیز بکار رفته است . همچنین ثابت شده است که t-dna tagging و به ویژه activation tagging وسیله ژنتیکی قدرتمندی برای جدا کردن ژنهای ناشناخته در گیاه است . در این پژوهش از گیاه آرابیدوپسیس تالیانا که در تحقیقات ژنتیکی از ارزش فراوانی برخوردار است ...
Peptides, the structures of which are indicated by (y-Glu-Cys)n-Gly (n^.2), were first reported from the fission yeast Schizosaccharomyces pombe}] When the yeast cells were cultured in a Cd-containing growth medium, Cdbinding substances were formed,2) in which the peptides with ^-values of 2 and 3 were contained, and the peptides were named cadystin.1} These peptides occur in higher plants when...
In short-term organ cultures of normal human peripheral lung, phenolic substrates are metabolized predominantly to sulphate ester conjugates with little or no glucuronic acid conjugates being formed (Mehta & Cohen, 1979). However, with shortterm organ culture of tumour tissue from the lung of the same patients, the converse appears true (R. Mehta & G. M. Cohen, unpublished work). The rationale ...
A large number of synthetic nucleoside analogues have been synthesized with potential for antiviral, antitumor and antiparasitic activity [ 11. The absorption of these compounds after oral administration is poorly understood. Indeed a lot of controversy exists as to whether these drugs are absorbed via predominantly active or passive means. In order to characterise the transport processes invol...
TO THE EDITOR Mitochondrial uncoupling, an increased permeability of the inner membrane to protons not coupled to ATP synthesis, dissipates mitochondrial membrane potential. Mild mitochondrial uncoupling is believed to prolong lifespan of certain model organisms by reducing the production of reactive oxygen species (ROS) and preventing oxidant damage (Brand, 2000). Indeed, long-lived Caenorhabd...
This issue of the Intel Technology Journal describes Intel's state-of-the-art logic and flash-memory technologies and how some of the key technology elements will evolve in the near future. Preface Since the invention of the integrated circuit some forty years ago, engineers and researchers around the world have worked on how to put more speed, performance and value onto smaller chips of silico...
iv Acknowledgement I would like to give my deepest thanks to my mentor, Dr. R. Adron Harris. I have been thinking I have a good fortune to meet him. In the future, I want to be a professor in the academic field. He has been a standard model of academic professor to me. He has been always working on something, patient to me for obtaining data, and critical questions and suggestions during lab-me...
Stereo vision plays an important role in planetary exploration, for it can percept and measure the 3-D information of the unstructured environment in a passive manner (Goldberg et al., 2002; Olson et al., 2003; Xiong et al., 2001). It can provide consultant support for robotics control and decision-making. So it is applied in the field of rover navigation, real-time hazard avoidance, path progr...
Introduction. Resonant micro-coil fiducial markers are increasingly being used to track devices within an MRI scanner [1,2]. Good results have been obtained with previously described methods of tracking such as multiple application of 1-D gradients [3,4]. Image processing has also been applied to track devices with 3D reconstruction [5]. In this report, we assess various image-processing algori...
Adv. Mater. 2010, 22, 2041–2044 2010 WILEY-VCH Verlag G T IO N Emerging biomaterials based upon analogues of native extracellular matrix proteins provide an opportunity to create protein scaffolds that mimic tissue mechanical behavior and guide cellular responses. However, in order to reproduce macroscale tissue properties, protein analogues must be endowed with appropriate microstructural feat...
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