Extremal trees of given segment sequence with respect to some eccentricity-based invariants

2020 ◽  
Vol 284 ◽  
pp. 111-123 ◽  
Author(s):  
Minjie Zhang ◽  
Chengyong Wang ◽  
Shuchao Li
Keyword(s):  
Segment Sequence

scholarly journals Batai and Ngari Viruses: M Segment Reassortment and Association with Severe Febrile Disease Outbreaks in East Africa

2006 ◽  
Vol 80 (11) ◽  
pp. 5627-5630 ◽  
Author(s):  
Thomas Briese ◽  
Brian Bird ◽  
Vishal Kapoor ◽  
Stuart T. Nichol ◽  
W. Ian Lipkin
Keyword(s):  
East Africa ◽  
Disease Outbreaks ◽  
Amino Acid Identity ◽  
Reassortant Virus ◽  
Febrile Disease ◽  
Segment Sequence ◽  
Human Illness ◽  
Batai Virus ◽  
Bunyamwera Virus

ABSTRACT Ngari virus is an orthobunyavirus recently recognized as a reassortant between Bunyamwera virus and an as yet unidentified M segment donor. Analysis of M segment sequences of Batai and Ilesha viruses revealed 95% deduced amino acid identity between Batai virus and Ngari virus. These findings suggest Batai virus as the donor of Ngari virus M segment sequence. Analysis of Batai virus-related African isolates identified UgMP-6830, isolated from mosquitoes in Uganda, as an isolate of Batai virus. KV-141, isolated during a febrile disease outbreak in Sudan, was identified as another isolate of Ngari virus, emphasizing a role of this reassortant virus in severe human illness throughout East Africa.

Dendrimer-Like Star-Branched Block Copolymers with Controlled Segment Sequence and their Star-Like Dendrigraft Derivatives

2014 ◽  
Vol 67 (1) ◽  
pp. 31 ◽  
Author(s):  
Chao Zhang ◽  
Junpo He
Keyword(s):  
Block Copolymers ◽  
Molecular Conformation ◽  
Coupling Reactions ◽  
Dilute Solution ◽  
Mica Substrate ◽  
Segment Sequence ◽  
Force Microscopy ◽  
Atomic Force ◽  
Star Copolymers ◽  
Grafting Reactions

Star polymers with star-like arms, namely dendrimer-like star-branched block copolymers, were synthesised by anionic polymerisation with 1,3-bis(1-phenylethenyl)benzene (MDDPE) and divinylbenzene (DVB) as the coupling agents. The segment sequence was controlled by changing the polymerisation sequences of different monomers and coupling reactions. Two types of dendrimer-like star-branched block copolymers were prepared with polyisoprene (PI) block incorporated in the interior part or on the periphery. The PI chains in the resulting star copolymers were iteratively grafted through epoxidation and grafting reactions, forming star-like dendrigraft copolymers. The molecular conformation of the products in dilute solution was analysed by static and dynamic light scattering. These products adopt large sized globular conformation in dilute solution. Atomic force microscopy shows that the star-like dendrigraft copolymers appear as collapsed spheres on mica substrate.

scholarly journals Analysis of the medium (M) segment sequence of Guaroa virus and its comparison to other orthobunyaviruses

2004 ◽  
Vol 85 (10) ◽  
pp. 3071-3077 ◽  
Author(s):  
Thomas Briese ◽  
Andrew Rambaut ◽  
W. Ian Lipkin
Keyword(s):  
Nucleocapsid Protein ◽  
Potential Role ◽  
Complement Fixation ◽  
Cross Reactivity ◽  
Cloning And Sequencing ◽  
Serological Reaction ◽  
Segment Sequence ◽  
Protease Cleavage ◽  
California Serogroup

Guaroa virus (GROV), a segmented virus in the genus Orthobunyavirus, has been linked to the Bunyamwera serogroup (BUN) through cross-reactivity in complement fixation assays of S segment-encoded nucleocapsid protein determinants, and also to the California serogroup (CAL) through cross-reactivity in neutralization assays of M segment-encoded glycoprotein determinants. Phylogenetic analysis of the S-segment sequence supported a closer relationship to the BUN serogroup for this segment and it was hypothesized that the serological reaction may indicate genome-segment reassortment. Here, cloning and sequencing of the GROV M segment are reported. Sequence analysis indicates an organization similar to that of other orthobunyaviruses, with genes in the order Gn–nsm–gc, and mature proteins generated by protease cleavage at one, and by signalase at possibly three, sites. A potential role of motifs that are more similar to CAL than to BUN virus sequences with respect to the serological reaction is discussed. No discernable evidence for reassortment was identified.

scholarly journals An Effective Watermarking Method Based on Energy Averaging in Audio Signals

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
S. E. Tsai ◽  
S. M. Yang
Keyword(s):  
Signal Processing ◽  
Data Compression ◽  
Error Correcting Code ◽  
Audio Signal ◽  
Segment Length ◽  
Signal Quality ◽  
Audio Signals ◽  
Segment Sequence ◽  
Audio Quality ◽  
Dct Coefficients

Methods based on discrete cosine transform (DCT) have been proposed for digital watermarking of audio signals; however, the watermark is often vulnerable to data compression and signal processing. This paper presents an effective audio watermarking method by energy averaging of DCT coefficients such that an audio signal with watermark is robust to data processing. The method is to divide an audio signal into segments by three parameters defining the segment length, the segment sequence of watermark location, and the frequency range of DCT coefficients for watermark location. An error correcting code is also integrated to improve audio signal quality after watermarking. Experimental results show that the method is robust to data compression and many other kinds of signal processing. No original signal is required for decoding the watermark. Comparison of watermarking performance with a recent work validates that the watermarking method has better audio quality and higher robustness.

Das graphematische Wort (im Deutschen): Eine erste Annäherung

2008 ◽  
Vol 27 (2) ◽  
Author(s):  
Nanna Fuhrhop
Keyword(s):  
Final Section ◽  
Segment Sequence ◽  
Word Level ◽  
Syntactic Features ◽  
Concept Of Word ◽  
Complex Words

AbstractIn the field of phonology, the concept of ‘word’ has been well-defined in contemporary linguistics. In morphology and syntax, the different existing theories provide a basis for establishing a ‘word’ as well. In graphematics, too, establishing a concept for ‘word’ might appear simple: A graphematic word is the segment sequence between two spaces. But what does this segment-sequence look like? The essay addresses this question in three steps. It begins by discussing the graphematic syllable. It then explains the principle of writing complex words. In German, this may be the prototypical part of graphematic words. For the non-prototypical part, acronyms, abbreviations, punctuation (hyphen, apostrophe, word-level period) and numbers are discussed. The final section is devoted to the interaction between the different concepts of words (phonological, morphological, syntactic and graphematical), and shows that the graphematic word in German is especially determined by morphological and syntactic features.

scholarly journals A new variable region in mouse immunoglobulin lambda light chains.

1987 ◽  
Vol 166 (1) ◽  
pp. 265-270 ◽  
Author(s):  
P Sanchez ◽  
P A Cazenave
Keyword(s):  
Light Chain ◽  
Single Injection ◽  
Gene Segment ◽  
Variable Region ◽  
Light Chains ◽  
Lambda Light Chain ◽  
Segment Sequence ◽  
Cell Clones ◽  
Mouse Immunoglobulin ◽  
Lambda Probe

A series of lambda+ murine hybridomas were derived from a BALB/c mouse after a single injection of anti-lambda 2 antibodies coupled to LPS. Nine lambda B cell clones (five lambda 2 and four lambda 3) were expected and seven reacted with antibodies specific for the C lambda 2 constant region but showed a particular isoelectric spectrum. Their RNA products did not hybridize with the V lambda probe. The partial DNA sequence of gene segments coding the unexpected light chain of one hybridoma shows that the V gene segment has only 55% homology with the V lambda 2 gene segment sequence and that J lambda 2 and probably C lambda 2 gene segments are used. Taken together, these results demonstrate the existence of a new lambda light chain.

scholarly journals HIV-1 gp140 epitope recognition is influenced by immunoglobulin DH gene segment sequence

2015 ◽  
Vol 68 (2) ◽  
pp. 145-155 ◽  
Author(s):  
Yuge Wang ◽  
Pratibha Kapoor ◽  
Robert Parks ◽  
Aaron Silva-Sanchez ◽  
S. Munir Alam ◽  
...  
Keyword(s):  
Gene Segment ◽  
Segment Sequence ◽  
Epitope Recognition ◽  
Hiv 1
Sign in / Sign up

Export Citation Format

Share Document