Flora Caucasica critica = Materialy dlia flory Kavkaza : kriticheskoe sistematichesko-geograficheskoe izsliedovanie / N. Kuznetsov, N. Bush, A. Fomin.

Bush, N. A.; Fomin, A. V.; Кузнецов, Н. И.

doi:10.5962/bhl.title.9632

Cited by 6 publications

(6 citation statements)

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“…is necessary for the existence of the pair (t/, q). For a broad class of systems of two conservation laws, LAx [16] has established the existence of a solution pair (q, q) where t/is strictly convex. Although the system of equations (2.22) is overdetermined for n > 2, most of the conservative systems of mathematical physics are endowed with an additional conservation law (2.21) in which r/is strictly convex.…”

Section: -A~[ U+ -U-] + [F(u +) -F(u-)] =0mentioning

confidence: 99%

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Decay of solutions of hyperbolic systems of conservation laws with a convex extension

DiPerna

1977

Arch. Rational Mech. Anal.

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Section: -A~[ U+ -U-] + [F(u +) -F(u-)] =0mentioning

confidence: 99%

“…While the theory is developed in the context of genuinely non-linear systems [9], only very minor modifications are necessary for a generalization to systems which admit linearly degenerate characteristic fields. We refer the reader to [16] for an extension of Glimm's method to an even wider class of systems.…”

Section: Introductionmentioning

confidence: 99%

Decay of solutions of hyperbolic systems of conservation laws with a convex extension

DiPerna

1977

Arch. Rational Mech. Anal.

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“…We synthesized a series of CPI samples from BPADA (intermonomer) and different pairs of diamines (CPI-1 series, Figure 6) in the melt of BA at 140°C with variable order of intermonomer loading [19]. In [20], two more CPI series (CPI-2 and CPI-3) were synthesized using dianhydrides ODPA and RDA as intermonomer and AFL and DDA as comonomers (Figure 7).…”

Section: Synthesis Of Random and Multiblock Copolymersmentioning

confidence: 99%

“…The work is supported by the Russian Foundation of Basic Research, Grant #19-03-00820, and the Ministry of High Education and Science of Russian Federation. 19 Synthesis of Polyimides in the Melt of Benzoic Acid DOI: http://dx.doi.org/10.5772/intechopen.87032…”

Section: Acknowledgementsmentioning

confidence: 99%

Synthesis of Polyimides in the Melt of Benzoic Acid

Alexeevich¹,

Yurievna²

2020

Solvents, Ionic Liquids and Solvent Effects

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Review of the authors' works on the synthesis of polyimides (PIs) by the method of one-stage high-temperature polycondensation in an unusual solvent-molten benzoic acid (BA). Compared with a known synthesis in inert high-boiling solvents, synthesis in BA takes place under mild conditions (140°C, 1-2 hour) to give completely imidized PIs. The approach has a number of advantages. Due to catalysis of the first reversible stage of amiс acid (AA) formation and low equilibrium constant (K = 10-20 l/mol), the first stage disappears kinetically, and the imidization reaction becomes limiting. The process becomes less sensitive to the basicity of diamines; therefore, low reactivity diamines can be involved. Water is easily removed from the melt by evaporation, which makes the whole process irreversible. Specific features of the method are successfully used to control the microstructure of the chain copolyimides (statistical to multiblock) and to synthesize hyperbranched PIs and star-shaped PIs with narrow molecular weight distribution.

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“…and Eusuchia indet., Ankylosauridae indet., the lambeosaurine Aralosaurus tuberiferus , Sauropoda indet., Ornithomimidae indet., Tyrannosauroidea indet., Therizinosauroidea indet., Caenagnathidae (?) indet., birds and eutherian mammals ( Beleutinus orlovi and Zhalmouzia bazhanovi ) (Rozhdestvensky 1964; Rozhdestvensky and Khozatsky 1967; Rozhdestvensky 1968, 1970, 1973; Kuznetsov 1976, 1977; Glickman 1980; Suslov 1982; Mertinene and Nesov 1985; Nesov 1986; Kuznetsov and Chkhikvadze 1987; Efimov 1988; Nesov and Khisarova 1988; Nesov 1995; Storrs and Efimov 2000; Kordikova et al 2001; Dyke and Malakhov 2004; Godefroit et al 2004; Averianov 2007b; Danilov et al 2007; Syromyatnikova and Danilov 2009; Vitek and Danilov 2010; Danilov et al 2011; Averianov and Sues 2012; Skutschas 2013; Syromyatnikova and Danilov 2013; Averianov et al 2014). …”

Section: Late Cretaceous Pterosaur Localities In Kazakhstanmentioning

confidence: 99%

The paleoenvironments of azhdarchid pterosaurs localities in the Late Cretaceous of Kazakhstan

Averianov¹,

Dyke²,

Danilov

et al. 2015

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Five pterosaur localities are currently known from the Late Cretaceous in the northeastern Aral Sea region of Kazakhstan. Of these, one is Turonian-Coniacian in age, the Zhirkindek Formation (Tyulkili), and four are Santonian in age, all from the early Campanian Bostobe Formation (Baibishe, Akkurgan, Buroinak, and Shakh Shakh). All so far collected and identifiable Late Cretaceous pterosaur bones from Kazakhstan likely belong to Azhdarchidae: Azhdarcho sp. (Tyulkili); Aralazhdarcho bostobensis (Shakh Shakh); and Samrukia nessovi (Akkurgan). These latter two taxa, both from the Bostobe Formation might be synonyms. Azhdarcho sp. from the Zhirkindek Formation lived in a tropical-to-subtropical relatively humid climate on the shore of an estuarine basin connected to the Turgai Sea. Known fossils were collected in association with brackish-water bivalves and so the overall paleoenvironment of this pterosaur was likely an estuarine marsh as indicated by the dominance of conifers and low relative counts of ferns and angiosperms. Aralazhdarcho bostobensis, from the Bostobe Formation, lived on a coastal fluvial plain along the Turgai Sea. This paleoenvironment was either floodplain (Akkurgan, Buroinak, and Shakh Shakh) or estuarine (Baibishe). In the Santonian – early Campanian, shallow waters near this coastal plain were sites for the intensive accumulation of phosphates under upwelling conditions caused by strong winds from the ancient Asian landmass. These winds also caused significant aridization of the climate during this time. We speculate that pterosaurs may have been attracted to this area by the abundant resources in the bio-productive estuaries and nearshore upwelling waters.

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Flora Caucasica critica = Materialy dlia flory Kavkaza : kriticheskoe sistematichesko-geograficheskoe izsliedovanie / N. Kuznetsov, N. Bush, A. Fomin.

Cited by 6 publications

References 0 publications

Decay of solutions of hyperbolic systems of conservation laws with a convex extension

Decay of solutions of hyperbolic systems of conservation laws with a convex extension

Synthesis of Polyimides in the Melt of Benzoic Acid

The paleoenvironments of azhdarchid pterosaurs localities in the Late Cretaceous of Kazakhstan

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