Wyniki wyszukiwania - BazTech

1

Disinfection Properties of Conventional White LED Illumination and Their Potential Increase by Violet LEDs for Applications in Medical and Domestic Environments

Buehler Jule, Sommerfeld Florian, Meurle Tobias, Hoenes Katharina, Hessling Martin

Advances in Science and Technology. Research Journal

|

2021

|

Vol. 15, no 2

169--175

EN

The antimicrobial impact of visible violet and blue light has been known for more than a century but hardly been applied for purposeful pathogen reduction or prevention. The disinfecting properties of wide-spread warm-white and cool-white light emitting diodes (LEDs) are investigated by irradiation of staphylococci with different LEDs and varying doses. Additionally, the combination of a white and a violet LED illumination is examined. Both white LEDs exhibit an antimicrobial effect, which seems to be dominated by the blue parts of the LED emissions. Unfortunately, the antimicrobial effect is weak in realistic illumination applications. Additional violet LEDs can significantly enhance this impact without a large change in human color perception. This allows reasonable applications in certain medical and domestic environments without endangering humans.

2

Santoryn a sprawa architektury nowoczesnej

Twardowski Mariusz

Środowisko Mieszkaniowe

|

2019

|

nr 28

60--71

PL

Santoryn to zaskakujące miejsce. Turyści zauroczeni wyspą chcą spędzać tu wakacje. A tymczasem niewiele osób spodziewa się znaleźć tu przykłady architektury nowoczesnej. W przeciwieństwie do wielu wspaniałych metropolii świata, historia wyspy nie jest oparta na wojnach i rozwoju ekonomicznym lub decyzjach politycznych a dzieleniu istnienia z erupcjami wulkanicznymi i trzęsieniami ziemi. W tak niebezpiecznym geoklimacie powstały niezwykłe budowle, które dzięki wpływowi warunków naturalnych, biedy, stały się niezwykle nowoczesne i ponadczasowe. Autor rozważa elementy architektury zabudowań wyspy, które prowadzą do wyżej wymienionych wniosków. Tu nie znajdzie się architektura modernistyczna ale architektura prosta, racjonalna, nowoczesna i ponadczasowa.

EN

Santorini is a surprising place. Tourists attracted to the island want to spend their holidays here. But people don’t expect to find here examples of modern architecture. In oposition to many great cities in the world, the history of the island is not based on wars, economic growth or political decisions but on volcanic eruptions and earthquakes. In such dangerous geo-climate, due to the influence of natural conditions and poverty, extraordinary buildings were created. They have become extremely modern and timeless. Author considers the architectural elements of buildings on the island, which lead to the above mentioned conclusions. It is impossible to find here architecture of Modernism but architetecture of simplicity, rationality, modernity and eternity.

3

Chemiczno-termiczna metoda wstępnej izolacji bioaktywnych protein białka jaja

Skiba T., Kopeć W., Bobak Ł.

Przemysł Chemiczny

|

2012

|

T. 91, nr 4

527-530

PL

Opracowano podstawy technologii wzbogacenia roztworów białka jaja w substancje bioaktywne, takie jak enzymy (lizozym), inhibitory proteinaz cysteinowych (cystatyna) i serynowych (owomukoid i owoinhibitor). Zwiększenie aktywności substancji biologicznie czynnych uzyskano w wyniku wykorzystania zróżnicowanej chemo- i termooporności białek jaja po obróbce w roztworach o pH 2–4, kształtowanej w wyniku dodania HCl lub kwasu cytrynowego oraz ogrzewania w temp. 50–70°C. Optymalne warunki procesu (pH 3,0, temp. 60°C) pozwalają na uzyskanie 4-krotnego wzrostu aktywności cystatyny i 2–3 krotnego wzrostu aktywności lizozymu i inhibitorów trypsyny.

EN

Egg white was dild. with NaCl soln., acidified by addn. of HCl or citric acid solns. and heat treated at 45.9–74.1°C for 30 min to sep. colloidal proteins by centrifugation. The optimum conditions for cystatin, trypsin and lysozyme sepn. were pH 3 and temp. 60°C.

4

Excimers and exciplexes in organic electroluminescence

Kalinowski J.

Materials Science Poland

|

2009

|

Vol. 27, No. 3

735--756

EN

In organic light emitting devices (LEDs) various types of emissive states are created: (i) molecular excited states (localized excitons), or bimolecular (B-M) species: excimers, electromers, exciplexes and electroplexes. The consequences of the formation of B-M excited species for optical and electrical characteristics of organic LEDs are discussed and illustrated by various examples. While molecular excitons can be viewed in some sense as correlated electron-hole (e-h) pairs with the inter-charge mean separation less than an intermolecular spacing, the size of B-M excited states amounts usually to one or two intermolecular spacings. The B-M species can be classified as electrically balanced states, formed under energy and charge exchange between neighbour molecules, and have either a singlet or a triplet character. The focus of the paper is on excimer and exciplex forming single phosphorescent dopant blends-based emitting layers but characteristic features of other B-M excited species (electromers and electroplexes) and their emissions are also mentioned. Of particular interest in modern optoelectronics are white and infrared organic LEDs. It is shown how excimer and exciplex emissions can be employed in manufacturing such devices. Examples include efficient white and near-infrared LEDs, based on single dopant emitters of an efficient N-C-N-coordinated platinum(II) complex phosphor, and their improved versions, obtained by modification of the emitter matrix materials and electron injecting electrodes.

5

Ultrasonic parameters of hen's egg

Opieliński K. J.

Molecular and Quantum Acoustics

|

2007

|

Vol. 28

203-216

EN

Hen’s egg is an easily accessible biomolecular model for ultrasonic study. It is a perfect object, allowing testing of the visualization possibilities by means of ultrasound transmission tomography. The aim of paper is showing complex characteristics of the ultrasonic parameters of hen’s egg in the frequency range 1–10 MHz.