Results 341 to 350 of about 25,360,752 (379)

Organocatalytic Ring-opening Polymerization Towards Poly(cyclopropane)s, Poly(lactame)s, Poly(aziridine)s, Poly(siloxane)s, Poly(carbosiloxane)s, Poly(phosphate)s, Poly(phosphonate)s, Poly(thiolactone)s, Poly(thionolactone)s and Poly(thiirane)s

2018
The following chapter is a collection of monomers that undergo organocatalyzed ring-opening polymerizations and have not been covered in a separate chapter of this book. This includes polymers widely used in industrial applications, but also solely academically relevant and more “exotic” polymer classes. As most of these polymers contain heteroatoms in
Frederik R. Wurm, Thomas Wolf
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Structure of Poly d(A)· Poly d(T)

Journal of Biomolecular Structure and Dynamics, 1992
On the basis of the x-ray data from polycrystalline and well oriented fibers of the sodium salt of poly d(A).poly d(T) (Arnott et al, Nucl. Acids Res. 11, 4141-4155 (1983), a revised B'-DNA model incorporating B-like adenine and thymine strands is shown to give a much better x-ray agreement (R = 0.25) than the previously assigned model consisting of ...
Rengaswami Chandrasekaran, Akella Radha
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Poly(A):Poly(U); Poly(O8A):Poly(U); Poly(A):Poly(MeNH5U) and poly(O8A):Poly(MeNH5U) versus bida semliki forest virus in chick embryos

Toxicology Letters, 1982
Poly(A):poly(U) (polyadenylic acid:polyuridylic acid hybrid); poly(O8A):poly(U) (poly-8-oxy-adenylic acid:polyuridylic acid hybrid); poly(A):poly(MeNH5U) (polyadenylic acid-5-methylamino uridylic acid hybrid) and poly(O8A):poly(MeNH5U) (poly-8-oxyadenylic acid:poly-5-methylamino uridylic acid hybrid) were studied in chick embryos to compare the ...
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Conformations of poly[d(A-T-T)]·poly[d(A-A-T)]

Journal of Molecular Biology, 1975
The sodium salt of poly[d(A-T-T)]·poly[d(A-A-T)] is observed in oriented and partially crystalline fibers to have the classical B -DNA molecular conformation at relative humidities >85% and the B -type D -form hitherto observed only for poly[d(Pur-Pyr)]·poly[d(Pyr-Pur)] DNAs, at relative humidities of zero to 85%.
Robert L. Ratliff, Struther Arnott, Erik Selsing   +2 more
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Poly(organosilanes), Poly(carbosilanes), Poly(organosilazanes) [PDF]

, 1996
Attempts to completely replace the carbon in n-alkanes by the next element of group IV, silicon has been of special interest to practical as well as theoretical chemists ever since the work of Kipping [1]. Interest in the group of compounds, known as poly(organosilanes) 2b has not diminished to the present day, especially since it is a well known fact ...
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Structural transitions in poly(A), poly(C), poly(U), and poly(G) and their possible biological roles

Journal of Biomolecular Structure and Dynamics, 2018
The homopolynucleotide (homo-oligonucleotide) tracts function as regulatory elements at various stages of mRNAs life cycle. Numerous cellular proteins specifically bind to these tracts. Among them are the different poly(A)-binding proteins, poly(C)-binding proteins, multifunctional fragile X mental retardation protein which binds specifically both to ...
Margarita I. Zarudnaya, Iryna M. Kolomiets, Andriy L. Potyahaylo, Dmytro M. Hovorun   +3 more
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Synthesis and coding properties of poly(c1A), poly(c3A), poly(c7A) and poly(h6A)

Biochemical and Biophysical Research Communications, 1973
Abstract The homopolynucleotides poly(c1A), poly(c3A), poly(c7A) and poly(h6A) ++ were synthesized from their corresponding nucleoside diphosphates using polynucleotide phosphorylase. With the exception of poly(h6A), which displayed no hypochromicity, the homopolynucleotides showed melting profiles similar to poly(A). All these polynucleotides, poly(
Heinrich Matthaei, Hans Günter Gassen, Lothar Hagenberg   +2 more
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Raman studies of nucleic acids. VII. Poly A · poly U and poly G · Poly C

Biopolymers, 1972
AbstractLaser‐excited Raman spectra of the double‐helical complexes poly A·poly U and poly G·poly C are reported for 2H2O and H2O solutions. The spectra are discussed in relation to their use as quantitative reference spectra for determining the dependence of the Raman scattering of RNA on secondary structure.
L. Lafleur, George J. Thomas, J. Rice
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Rapid Prototyping of Microfluidic Systems in Poly(dimethylsiloxane).

Analytical Chemistry, 1998
This paper describes a procedure that makes it possible to design and fabricate (including sealing) microfluidic systems in an elastomeric material [Formula: see text] poly(dimethylsiloxane) (PDMS) [Formula: see text] in less than 24 h.
D. Duffy, J. C. Mcdonald, Olivier J. A. Schueller, G. Whitesides   +3 more
semanticscholar   +1 more source

Methylene blue intercalates with triplex poly(dT)*poly(dA)·poly(dT) but not duplex poly(dA)·poly(dT)

J. Chem. Soc., Chem. Commun., 1995
Methylene blue intercalates with triplex poly(dT*dA·dT) even though it binds to the precursor duplex poly(dA·dT) in the major groove; the switch may be related to conformational modifications of the polynucleotide structure upon binding of the third strand.
Bengt Nordén, Eimer Tuite
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