A previous report (1) has indicated that Rhoeo discolor is susceptible to infection only by tobacco mosaic virus ribonucleic acid but not by the complete virus; however, recently Bawden (2)’ has obtained evidence that the intact virus can also multiply in this host. The present report indicates that these contradictory results are due to extreme differences in the physiological state of the hos...

The detailed amino acid analysis of several strains of tobacco mosaic virus carried out by Knight (1) has revealed interesting chemical similarities and differences among these strains, although they are morphologically very similar (2). In the present work the isoelectric points of the strains which Knight has analyzed were determined by a method developed by the author (3). The virus strains ...

A method is described for the estimation of the true width of fibrillar or rod-like structures from electron micrographs of metal-shadowed preparations. The method is based on variations in the image width as a function of the angle (beta) between the long axis of the fibril and the direction of the shadow in the plane of the preparation. The image width when beta = 0 degrees practically repres...

A DNA polymerase activity is found within the Cauliflower Mosaic Virus (CaMV) particle. Analysis of the reaction product reveals that the linear form of the virion DNA is preferentially labelled. The molecular weight of the DNA polymerase as determined on an "activity gel" is 76 kDa.

iThe physiology of virus formation and the chemotherapy of virus diseaes are subjects that are now receiving much attention. The literature in these fields is too voluminous to be covered here. In general the evidence indicates that, although a number of viruses may have similar requirements, others may behave differently toward chemical treatments. This paper gives the results of tests to dete...

A 15-nucleotide (nt) unstructured RNA with an initiation site but lacking a promoter could direct the initiation of RNA synthesis by the brome mosaic virus (BMV) replicase in vitro. However, BMV RNA with a functional initiation site but a mutated promoter could not initiate RNA synthesis either in vitro or in vivo. To explain these two observations, we hypothesize that RNA structures that canno...

Mosaic is a common disease symptom caused by virus infection in plants. Mosaic leaves of Tomato mosaic virus (ToMV)-infected tobacco plants consist of yellow-green and dark green tissues that contain large and small numbers of virions, respectively. Although the involvement of RNA silencing in mosaic development has been suggested, its role in the process that results in an uneven distribution ...

Genetic aberrations are commonly seen in human preimplantation embryos. Non-disjunction and premature division of a chromosome are common in both meiosis and mitosis divisions. The expected result for meiotic aneuploidies is full aneuploidy in the later stages whereas mosaicism is the most frequent event in the cleavage and blastocyst stages. The main causes for mosaicism are post-zygotic event...

This paper discusses a secure novel approach of high rate data hidden using mosaic image and bitmap (bmp) cryptosystem. The mosaic image used in this approach together with the neural cryptosystem that have been implemented for the first time and has been successful, this new method of hiding data is based on LSB in mosaic images. A mosaic is an image that is comprised of hundreds or thousands ...

bstract. Mosaic images are captured by a single charge-coupled evice/complementary metal-oxide-semiconductor (CCD/CMOS) ensor with the Bayer color filter array. We present a new qualityffective zooming algorithm for mosaic images. First, based on daptive heterogeneity projection masks and Sobeland luminancestimation-based masks, more accurate gradient information is exracted from the mosaic ima...