Filters (1)
Filters
Filters
Download Results
88,065 research outcomes, page 1 of 8,807
  • publication . Article . 2001
    Closed Access
    Authors:
    Ju. Ivanova; Rumyana Djingova; Siegfried Korhammer; Bernd Markert;
    Persistent Identifiers
    Publisher: Elsevier BV

    Abstract Four digestion procedures for microwave dissolution of soils and sediments are investigated. Accurate results (accuracy better than 10%) for lanthanides, Be, Bi, Te, Th, U and Y are obtained only after an overnight stay with a mixture of 2 ml 48% HF and 2 ml 65...

    Add to ORCIDorcid
  • publication . Part of book or chapter of book . 2011
    Authors:
    Vesselin Drensky; Edward Formanek;
    Persistent Identifiers
    Publisher: Birkhäuser Basel

    The first paper in which the notion of polynomial identity appears that I know of is a 1922 article of M. Dehn [D], where his goal was to generalize Pappus’ Theorem from projective geometry. (His program was carried out by S.A. Amitsur in 1966 [A4] using rational identi...

    Add to ORCIDorcid
  • publication . Article . Preprint . 2021
    Open Access English
    Authors:
    Ilinka Dimitrova; Jörg Koppitz;

    UDC 512.5 We determine the relative rank of the semigroup ${\scr T }(X,Y)$ of all transformations on a finite chain $X$ with restricted range $Y\subseteq X$ modulo the set ${\scr OP }(X,Y)$ of all orientation-preserving transformations in ${\scr T }(X,Y).$ Moreover, we ...

    Add to ORCIDorcid
  • publication . Article . 2020
    Open Access English
    Authors:
    Tatyana M. Betova; Radoslav G. Trifonov; Savelina L. Popovska; Ivan N. Ivanov; Sergey D. Kostadinov;
    Persistent Identifiers
    Publisher: Balkan Medical Union
    Country: Bulgaria

    Introduction. Invasive apocrine carcinoma of the breast is a rare special subtype of mammary carcinoma and accounts for 0.3-1% of all breast malignancies. It has specific histological, immunohistochemical, and molecular genetic characteristics. The tumour cells have a u...

    Add to ORCIDorcid
  • publication . Article . 2007
    Open Access
    Authors:
    Iv. Andreeff; G. Dimoff; St. Metschkarski;
    Persistent Identifiers
    Publisher: Medical Journals Sweden AB
    Add to ORCIDorcid
  • publication . Part of book or chapter of book . 2012
    Authors:
    S. Panchev;
    Persistent Identifiers
    Publisher: Springer Netherlands

    The Earth’s surface is a rigid lower boundary of the atmosphere. Due to this, a boundary layer exists in the wind velocity field or in other meteorological elements. Because the air flow is generally turbulent, this is a turbulent boundary layer rather than molecular. N...

    Add to ORCIDorcid
  • publication . Part of book or chapter of book . 2015
    Authors:
    Svetlin G. Georgiev;
    Persistent Identifiers
    Publisher: Springer International Publishing
    Add to ORCIDorcid
  • publication . Article . 2007
    Authors:
    A. Zheliaskova; A. Derzhanski;
    Persistent Identifiers
    Publisher: Informa UK Limited

    Abstract The proton spin lattice relaxation time Tt has been measured for several samples of the binary system Triton X 114-water in the concentration range 20-90 per cent by weight. The correlation time, the activation energy and the constant of the dipole-dipole inter...

    Add to ORCIDorcid
  • publication . Article . 2006
    Open Access
    Authors:
    M.I. Borisov; D.V. Stojanov; V.V. Velkov; J.I. Burov;
    Persistent Identifiers
    Publisher: Institution of Engineering and Technology (IET)

    The field-effect transistor is used for a linear control of the acoustic radiation of single-electrode section of the surface-wave transducer. The electrically controlled surface-wave filters and delay lines, the characteristics of which may be specified by a set of con...

    Add to ORCIDorcid
  • publication . Article . 2017
    Closed Access
    Authors:
    Urszula Szeluga; Sławomira Pusz; Bogumiła Kumanek; Jerzy Myalski; Bartosz Hekner; Boyko Tsyntsarski; Rafal Oliwa; Barbara Trzebicka;
    Persistent Identifiers
    Publisher: Elsevier BV

    Abstract The concept of application of crumbled carbon foam obtained from polymer precursor as a filler in polymer/carbon composite was described. The carbon foam used as powdered reinforcement of composites was prepared from epoxy resin cross-linked with phenol–formald...

    Add to ORCIDorcid
88,065 research outcomes, page 1 of 8,807