Temat: 87.19.Tt - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Optical Properties of Human Blood Sediment
Autorzy:: Grzegorzewski, B.
Kowalińska, E.
Tematy:: 42.25.Bs
82.70.Dd
87.19.Tt; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1858190.pdf Link otwiera się w nowym oknie
Opis:: The formation of human blood sediment by means of optical method was studied. Light was transmitted through a layer of blood. The temporal changes of the transmitted light intensity along the sample were measured. Samples of blood from a healthy donor were investigated. The optical method permits us to distinguish three phases of the blood sediment. At the top of the container the well-known supernatant plasma layer creates. In the sediment of the red blood two phases were distinguished. The rouleau formation phase and the phase of demixed blood were found. The two phases are separated by the moving boundary. The kinetics of this boundary was determined. The optical data admit to a hypothesis about the physical phenomena of the sedimentation process. The spinodal decomposition may be one of the mechanisms of the blood sediment formation.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Quietness in the Soundscape of the Białowieża National Park
Autorzy:: Wiciak, J.
Mleczko, D.
Ozga, A.
Wszołek, G.
Wierzbicki, J.
Piechowicz, J.
Małecki, P.
Tematy:: 43.66.-x
43.66.+y
87.18.Tt
87.19.lc
43.50.Rq; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1402187.pdf Link otwiera się w nowym oknie
Opis:: The quietness, defined as the near or complete absence of sound, in the context of the natural environment protection, may be considered a state in which no undesired of foreign sounds occur, and, by analogy to noise, analyzed in two aspects: that pertaining to measurements and the subjective one. The article discusses the lowest levels of sounds recorded at night in the soundscape of the Białowieża Forest. Due to low levels of the examined sounds and the technical problems that occurred while the sounds were being measured and registered, the acoustic examination of the measurement set-up in an anechoic chamber has also been presented. The research is aimed at defining precisely the concept of quietness prevailing in the nature in the subjective aspect by determining both the range of levels and the characteristics of preferred sounds.
Dostawca treści:: Biblioteka Nauki

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