Wyniki wyszukiwania - AGRO

1

Development of filial attachment in sheep: from behaviour to brain

100%

Nowak R.

Acta Neurobiologiae Experimentalis

|

2005

|

tom 65

|

nr 5

2

Sprzymierzency bocianow z krosnienskiego

100%

Nowak R.

Ptaki. Biuletyn Ogólnopolskiego Towarzystwa Ochrony Ptaków

|

1998

|

nr 2

7-8

3

Flawonoidy w rodzaju Rosa L.

100%

Nowak R.

Herba Polonica

|

1994

|

tom 40

|

nr 3

118-124

The state of research over flavonoid compounds in genus Rosa L. has been presented. The need for further research as well as the necessity and purposefulness of using detailed taxonomie descriptions of the plants in phytochemical research of this genus have been pointed out.

4

Ellagic acid content in various species of medical plant

100%

Nowak R.

Herba Polonica

|

2003

|

tom 49

|

nr 3-4

5

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Wpływ prędkości filtracji na usuwanie manganu i żelaza z wody na wybranych złożach filtracyjnych

100%

Nowak R.

Ekonomia i Środowisko

|

2013

|

nr 2[45]

6

Strefy wejsc budynku. Czesc I

100%

Nowak R.

Menu. Przewodnik po Wielkopolskiej Gastronomii i Hotelach

|

2001

|

tom 08

|

nr 04

16

7

Szanse rozwoju grup producenckich w Polsce

100%

Nowak R.

Hasło Ogrodnicze

|

2001

|

nr 11

16-19

8

Sprzety i urzadzenia. Czesc III

100%

Nowak R.

Menu. Przewodnik po Wielkopolskiej Gastronomii i Hotelach

|

2001

|

tom 08

|

nr 06

18

9

Fatty acids composition in fruits of wild rose species

100%

Nowak R.

Acta Societatis Botanicorum Poloniae

|

2005

|

tom 74

|

nr 3

The oil content and fatty acids profile of a number of Polish wild species of rose fruits were examined by GC. The total fatty acid contents ranged from 6.5% to 12.9% of dry mass in fruits. The composition of oils was similar in the investigated species. 17 components were identified. An average composition was estimated as follows: linoleic acid (44.4-55.7%), a-linolenic acid (18.6-31.4%), oleic acid (13.5-20.3%), palmitic acid (2.3-3.3%), stearic acid (1-2.5%), octadecenoic acid (0.38-0.72%), eicosenoic acid (0.3-0.7%), eicosadienoic acid (0-0.16%), erucic acid (0.03-0.17%) and minor fatty acids. The results indicate that rose fruits are a rich source of unsaturated fatty acids, especially in R. rubiginosa, R. rugosa and R. dumalis. There were statistically significant (p<0.05) differences in fatty acid compositions of some species. Fatty acids were suggested to have a potential chemotaxonomic value in this genus.

10

Optimization of a measurement of flavonol aglycons in some medicinal plants by SPE-RP-HPLC method. Part 2. Choice of the way of sample preparation and purification

100%

Nowak R.

Herba Polonica

|

2003

|

tom 49

|

nr 3-4

The aim of this examination was optimization of flavonols' detection method in plant's extracts. The leaves of Rosa canina L. and Rosa damascena Mill, were chosen as the experimental material, due to their rich content of flavonols. In the study, optimization and comparison of extraction, hydrolysis and purification processes of samples predestinated to HPLC analysis of flavonol aglycones were performed. The most optimal method to detect flavonols in examined material was their direct hydrolysis with 1.2 N HCL during 1 h connected with its extraction with 50% methanol and then purification of the sample by SPE before HPLC examination. The comparison and evaluation of two elaborated methods of hydrolyzate purification from neutral compounds, which are liquid-liquid extraction (LLE) with ethyl acetate and solid phase extraction (SPE) in RP-18 microcolumns, were carried out. 78% recovery of standard quercetin during LLE and 98.8% recovery of standard quercetin during filtering and elution of hydrolyzate with methanol through octadecyl microcolumns in SPE method were observed. These results showed that SPE is better then LLE during superior sample purification procedure.

11

Optimization of a measurement of flavonol aglycones in some medicinal plants by SPE RP HPLC method. Part I. Analysis of standard aglycones mixture stability in different hydrolysis conditions

100%

Nowak R.

Herba Polonica

|

2002

|

tom 48

|

nr 4

The aim of this examination was optimization of flavonols’ detection method in plant’s extracts. In the first stage of the research the analysis of standard aglycones mixture stability in different hydrolysis conditions was performed. It was shown, among others, that most of the flavonols aglycones presented high durability during heating with acid. Moreover, the significant impact of acidity of environment of the reaction (acid’s kind and concentration) on the height and surface area of analyzed compounds was observed. These facts indicate the necessity of using in quantitative analysis solutions of standards of pH similar to pH of analyzed hydrolyzates. Also the possibility of obtaining incorrect results while using sulfuric acid as hydrolytic medium of the examined extracts was shown.

12

Chemia profesjonalna - dozowanie

88%

Nowak R.

Menu. Przewodnik po Wielkopolskiej Gastronomii i Hotelach

|

2001

|

tom 08

|

nr 09

16

13

Kluby mlodziezowe w Stanach Zjednoczonych

88%

Nowak R.

Informator. Skierniewicki Biuletyn Rolniczy

|

1994

|

nr 15

6-7

14

Kontrola towarow paczkowanych - jakie to proste!!!

75%

Nowak R.

Przegląd Mleczarski

|

2003

|

nr 06

222-223

15

Czy marchew musi byc pomarańczowa?

75%

Nowak R.

Hasło Ogrodnicze

|

2014

|

nr 05

16

Farmakognostyczne badania ziela Epilobium angustifolium L. i Epilobium parviflorum Schreb.

63%

Nowak R., Krzaczek T.

Herba Polonica

|

1998

|

tom 44

|

nr 1

5-10

W zielu Epilobium angustifolium i Epilobium parviflorum metodami spektrofotometrycznymi określono w przeliczeniu na suchą masę całkowitą zawartość polifenoli wolnych (9,1%; 8,7%) oraz po hydrolizie kwasowej (17,9%; 13,5%) i zasadowej (9,7%; 9,0%), ilość o-dihydroksyfenoli (3,1%; 2,1%) oraz sumy triterpenów i steroli (4,2%; 4,7%). Zawartość flawonoidów oznaczona metodą Christa-Müllera wynosi w zielu E. angustifolium 6,6%, a w E. parviflorum 5,9%, natomiast metodą Hagedorna-Neu'a odpowiednio 4,4% oraz 3,0%. W zielu E. angustifolium określono metodą wagową ogólną zawartość steroli jako 0,1331 g w 100 g surowca. Metodą RP-HPLC określono zawartość aglikonów flawonoidowych po hydrolizie kwasowej w tym surowcu: 0,42% kwercetyny, 0,37% kemferolu, 0,32% mirycetyny.

17

Phenolic acids in leaves of Secamone afzelii (Rhoem.) Schult. (Asclepiadaceae)

63%

Nowak R., Kawka S.

Acta Societatis Botanicorum Poloniae

|

1998

|

tom 67

|

nr 3-4

18

Prognoza zmian użytków rolnych w Polsce

63%

Nowak R., Sawilow E.

Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa

|

1991

|

tom 30.2

19

Granulowane nawozy wieloskladnikowe na bazie superfosfatu prostego

63%

Nowak R., Winiarski A.

Folia Universitatis Agriculturae Stetinensis. Agricultura

|

1998

|

tom 72

239-242

20

Analiza pracy miejskiej oczyszczalni sciekow JAMNO w Koszaline

63%

Anielak A. M., Nowak R.

Zeszyty Naukowe Wydziału Budownictwa i Inżynierii Środowiska. Seria:Inżynieria Środowiska. Politechnika Koszalińska

|

1996

|

nr 11

7-18

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