Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

Znaleziono wyników: 6

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Acrobat MZ 69 WP w profesjonalnej ochronie plantacji ziemniaka przed alternarioza i zaraza ziemniaka

100%

Daniel P.

Top Agrar Polska

2004

nr 05

Allegro 250 SC - nowej generacji fungicyd firmy BASF w ochronie buraka cukrowego przed chorobami lisci

100%

Daniel P.

Top Agrar Polska

2004

nr 05

Wyjatkowa skutecznosc fungicydu Tattoo C 750 SC w profesjonalnej ochronie ziemniaka

100%

Daniel P.

2001

nr 07-08

5-6

Wplyw nawozenia, uzytkowania na wartosc pokarmowa i przydatnosc do zakiszania wybranych mieszanek traw [czesc II]

51%

Zarudzki R. , Opitz v.Boberfeld W. , Daniel P.

tom 12

123-137

Wplyw nawozenia, uzytkowania na sklad botaniczny i plony wybranych mieszanek traw [czesc I]

51%

Zarudzki R. , Opitz v.Boberfeld W. , Daniel P.

tom 12

113-122

Raman spectroscopy of C8, C18, CN, and DIOL chemically bonded TLC-type stationary phases

51%

Kowalska T. , Kowalik G. , Daniel P.

2000

tom No. 10

85-96

We have previously used high-power laser Raman spectroscopy to investigate selected aliphatic chemically bonded TLC-type stationary phases (C8, C18, CN, and DIOL) and determine the density of coverage of the inorganic silica matrix with organic ligands. It was established that the thermal energy of the neodymium laser light in the near infrared (NIR) caused irreversible damage to octyl, octadecyl, 3-cyanopropyl, and diol ligands and that this damage was most probably partial dehydrogenation, then aromatization of the aforementioned ligands. This resulted in a very intense, broad, and finely structured Raman band in the region from ca 2285 to 1130 cm–1 which enabled relatively easy quantification of the density of coverage of the silica matrix with the respective aliphatic ligands (which otherwise is hardly possible to assess). It is the aim of this paper to provide additional, although indirect, proof of our hypothesis that NIR irradiation is capable of structural transformation (basically, aromatization) of aliphatic chemically bonded ligands. Our approach to this issue consisted simply in acquiring additional Raman spectra of the same TLC-type C8, C18, CN, and DIOL stationary phases, this time by use of low-power argon–krypton ion laser Raman spectroscopy (emitting non-destructive 514.5-nm green radiation) and to check these spectra for the presence (or otherwise) of the spectacular and predominant Raman band in the region from ca 2285 to 1130 cm–1. The absence of this band would furnish indirect evidence for the destructive impact of the high-power neodymium laser. In fact, our new series of Raman spectra from the low-power argon–krypton ion laser contained no trace of the aforementioned band.