Wyniki wyszukiwania

1

The radical scavenging capacity of green tea

100%

Muzolf M., Gliszczynska-Swiglo A., Tyrakowska B.

Polish Journal of Natural Sciences. Supplement

|

2007

|

tom 04

63-69

2

A simple method for visualization of phenolics exudation by roots of intact lupin plants; the effect of nitrate and pH

100%

Wojtaszek P., Peretiatkowicz M.

Acta Biochimica Polonica

|

1992

|

tom 39

|

nr 4

Phenolics exudation by imbibed seeds and roots of intact lupin plants (Lupinus albus L.) was studied during the first 4 days of growth by a new agar test with specific reagents for phenolics (Gibbs reagent, Naturstoffreagenz A). Comparative studies of the phenolics exudation reveal that legumes exude different phenolics (even if not qualitatively, then at least quantitatively) than oat. The exudation of phenolics starts very quickly after the imbibition of seeds and can be visualized as early as 24 h after sowing. In older seedlings, the exudation of phenolics can be detected along root zones and is influenced by nitrate and pH. At acidic pH, nitrate reduces phenolics exudation, but at pH 7.5 the exudation of phenolics becomes restricted to only some root zones. Nitrate must be present in the rooting media for at least 24 h to cause visible changes in the pattern of exudation at different pH values.

3

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Influence of pH and Cellic® CTec2 enzymes dose on the glucose yield after enzymatic hydrolysis of cellulose at 45 °C

84%

Marchwicka M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

|

2020

|

tom 112

4

Effect of soil pH on uptake and accumulation of zinc and manganese by apple trees (Malus domestica Borkh.) cv. 'Fuji'

84%

Cieslinski G., Neilsen G. H., Hogue E. J.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

1998

|

tom 456

5

Viable but non-culturable state [VBNC] of Escherichia coli related to EnvZ under the effect of pH, starvation and osmotic stress in sea water

67%

Darcan C., Ozkanca R., Idil O., Flint K. P.

Polish Journal of Microbiology

|

2009

|

tom 58

|

nr 4

307-317

When exposed extreme environmental conditions such as sea water, bacteria have been shown different survival strategy for continue their life. One of this strategy known as viable but nonculturable (VBNC) state which is very important for nondifferiation bacteria. VBNC cells cause serious human health problems. Little is known, however, about the genetic mechanisms underlying the VBNC state. Under different environmental conditions, porins are important in the survival strategy of bacteria. EnvZ/OmpR work together as regulators of ompF and ompC gene expression. It is known that the EnvZ system has a role in VBNC state. In this study we tried to find out the viability of EnvZ, OmpC and OmpF mutant E. coli under stress effect of osmolarity, pH and starvation. Bacteria were suspended in filtered-autoclaved sea water microcosms and numbers determined over 25 day incubation periods by plate count (PC), direct viable count (DVC) and count of cells capable of respiration (RCC). As regard to results, alkaline pH affected E. coli more than acidic pH, which led to decline in number. On the contrary glycine betaine addition to sea water protected E. coli porin mutants and also reduced the death rate of bacteria. Under the effect of pH, osmotic stress and starvation stress, wild type E. coli and porin mutants entered a dormant state or became VBNC with the exception of MSZ31 (envZ mutant) E.coli cells which did not enter the VBNC state under the three tested stress conditions. This study is the first report to demonstrate that E. coli could not enter the VBNC state in the lack of EnvZ product under the stress of osmolarity, pH and starvation and the relationship between EnvZ and VBNC state are not affected by pH, osmolarity and starvation.

6

Initial growth and yield structure of selected cultivars of cranberry (Vaccinium macrocarpon Ait.) cultivated on mineral soils

67%

Szwonek E., Maciorowski R., Kozinski B., Smolarz K., Sas‑Paszt L., Bryk H., Derkowska E., Estabrooks E.

Folia Horticulturae

|

2016

|

tom 28

|

nr 1

7

Interaction of metals with humic acid isolated from oxidized coal

67%

Erdogan S., Baysal A., Akba O., Hamamci C.

Polish Journal of Environmental Studies

|

2007

|

tom 16

|

nr 5

671-675

The sorption behaviour of divalent cations M+ (Cu, Pb and Zn) and trivalent cations M3+ (Fe, Al) with humic acid isolated from oxidized coal (Hazro,SE Anatolia,Turkey) was followed in aqueous solution. Coal humic acid and metal ion interaction was investigated with special emphasis on the effects of pH, metal ion concentration and humic acid concentration. It has been found that the interaction of humic acid with metal ions in solution increases with pH, decreases with metal ion concentration and increases with humic acid concentration. The differences in sorption ability of particular metal ions on oxidized coal-derived humic acid are Fe> Pb> Cu> Al> Zn and Fe> Pb> Al> Cu> Zn at pH 2.5 and 3.5, respectively, while they are Fe=Pb=Cu=Al> Zn at both pH 4.5 and 5.5. The interaction of some trivalent (Fe, Al) and divalent(Cu, Pb, Zn) metal ions with humic acid prepared from coal was also studied using FTiR spectroscopy. This has proven helpful with respect to metal binding to understand better the potential sites of binding within the humic acid. Infrared spectroscopy showed the participation of cOOH and OH groups in binding to the metal ions.

8

The effect of pH and stabilization time on apparent viscosity of aqueous dispersion of wholemeal barley flour

67%

Zarzycki P., Wirkijowska A., Sobota A., Sykut-Domanska E.

Acta Agrophysica

|

2019

|

tom 26

|

nr 2

9

Ozone for color and COD removal of raw and anaerobically biotreated combined industrial wastewater

67%

Yasar A., Ahmad N., Chaudhry M. N., Rehman M. S. U., Khan A. A. A.

Polish Journal of Environmental Studies

|

2007

|

tom 16

|

nr 2

Ozonation was carried out for decolorization and COD removal of raw and anaerobically treated UASB (upflow anaerobic sludge blanket) combined industrial (mainly textile) effluent in a lab-scale bubble column reactor. Ozonation of anaerobic bioprocess effluent at a dose of 300 mg/h for 10 min resulted in 81% color and 75% COD removal (100 mgO3/80 mg COD) while for raw wastewater 25 min ozonation furnished 51% color and 67% COD removal (250 mgO₃/345 mg COD). Optimal process conditions for biotreated effluent (pH = 8 and temperature = 25°C) resulted in 100% color and 96% COD removal for 10 min ozonation (100 mgO₃/104 mg COD). Electrical energy comparison demonstrated that post ozonation required less electrical energy, 16 and 2.9 times as compared to pre ozonation.

10

H NMR spectra of G- and F-actin

67%

Slosarek G.

Current Topics in Biophysics

|

1995

|

tom 19

|

nr 1

Ograniczanie wyników

The radical scavenging capacity of green tea

A simple method for visualization of phenolics exudation by roots of intact lupin plants; the effect of nitrate and pH

Influence of pH and Cellic® CTec2 enzymes dose on the glucose yield after enzymatic hydrolysis of cellulose at 45 °C

Effect of soil pH on uptake and accumulation of zinc and manganese by apple trees (Malus domestica Borkh.) cv. 'Fuji'

Viable but non-culturable state [VBNC] of Escherichia coli related to EnvZ under the effect of pH, starvation and osmotic stress in sea water

Initial growth and yield structure of selected cultivars of cranberry (Vaccinium macrocarpon Ait.) cultivated on mineral soils

Interaction of metals with humic acid isolated from oxidized coal

The effect of pH and stabilization time on apparent viscosity of aqueous dispersion of wholemeal barley flour

Ozone for color and COD removal of raw and anaerobically biotreated combined industrial wastewater

H NMR spectra of G- and F-actin