Search results

1

Background level of 8-oxo-2'-deoxyguanosine in lymphocyte DNA does not correlate with the concentration of antioxidant vitamins in blood plasma.

100%

Gackowski D., Ciecierski M., Jawień A., Oliński R.

|

2001

|

vol. 48

|

issue 2

535-539

EN

Antioxidant vitamins, being effective free radical scavengers, can protect cellular DNA from oxidative damage. Therefore, in the present study we report on the relationship between basal level of 8-oxo-2'-deoxyguanosine in human lymphocyte DNA and the concentration of antioxidant vitamins (A, C and E). The average level of 8-oxo-2'-deoxyguanosine in lymphocytes of the studied group (15 males and 20 females) was 9.57 per 106 dG molecules. The endogenous level of ascorbic acid (vitamin C) in the plasma was, on average, 56.78 μM, while the mean concentrations of retinol (vitamin A) and α-tocopherol (vitamin E) were 1.24 μM and 25.74 μM, respectively. No correlations were found between individual 8-oxo-2'-deoxyguanosine levels in lymphocyte DNA and endogenous concentration of the vitamins.

2

A study of free radical chemistry: their role and pathophysiological significance

88%

Gutowski M., Kowalczyk S.

|

2013

|

vol. 60

|

issue 1

1-16

EN

Oxygen is one of the most important molecules on Earth mainly because of the biochemical symmetry of oxygenic photosynthesis and aerobic respiration that can maintain homeostasis within our planet's biosphere. Oxygen can also produce toxic molecules, reactive oxygen species (ROS). ROS play a dual role in biological systems, since they can be either harmful or beneficial to living systems. They can be considered a double-edged sword because at moderate concentrations, nitric oxide (NO•), superoxide anion, and related reactive oxygen species play an important role as regulatory mediators in signalling processes. Many of the ROS-mediated responses actually protect the cells against oxidative stress and re-establish "redox homeostasis". On the other hand, overproduction of ROS has the potential to cause damage. In the recent decades, ROS has become a focus of interest in most biomedical disciplines and many types of clinical research. Increasing evidence from research on several diseases shows that oxidative stress is associated with the pathogenesis of diabetes mellitus, obesity, cancer, cardiovascular diseases, inflammation, ischaemia/reperfusion injury, obstructive sleep apnea, neurodegenerative disorders, hypertension and ageing.

3

Alleviation Ofzinnia elegansJacq. Seed Deterioration Using Hydrogen Peroxide and Organic Acids

88%

Szopińska D.

Ecological Chemistry and Engineering S

|

2014

|

vol. 21

|

issue 2

309-326

EN

The decrease of seed quality during storage is strongly associated with damage caused by free radicals. Some compounds of natural origin, known due to their antioxidative and antifungal properties, may be potentially used in organic production for seed treatment as an alternative to pesticides. The aim of the experiment was to study an ability of hydrogen peroxide and organic acid to improve germination, vigour and health of non-deteriorated and deteriorated zinnia seeds. Two seed samples, cv. Illumination and Orys, varying in initial infestation with fungi were tested. For deterioration seeds were kept at 30°C and 80% RH for 30 days. Seed quality tests were performed before and after deterioration for controls and seeds soaked in 3.0% hydrogen peroxide solution and in 1.0 and 5.0% solutions of ascorbic and lactic acids for 10, 30 and 60 min. The controls were untreated seeds, seeds soaked in 0.2% solution of Kaptan zawiesinowy 50 WP for 30 min and seeds soaked in distilled water for 10, 30 and 60 min. Treating zinnia seeds with organic acids more significantly affected seed germination and health after deterioration than before, and improvement of germination capacity was usually correlated with decrease of the percentage of abnormal diseased seedlings. Deterioration had no influence on mean germination time, whereas in particular cases treating seeds with hydrogen peroxide and organic acids negatively affected this parameter. After deterioration regardless of treatment increased number of seeds free from fungi. Lactic acid followed by hydrogen peroxide and ascorbic acid effectively limited growth of A. alternata, A. zinnia and Fusarium spp. on zinnia seeds, however at higher concentration negatively affected seed germination and vigour. Moreover, treating seeds with hydrogen peroxide and organic acids many a time increased seeds infestation with B. cinerea.

4

Investigation Of Infrared Drying Behaviour Of Spinach Leaves Using ANN Methodology And Dried Product Quality

75%

Sarimeseli A., Yuceer M.

Chemical and Process Engineering

|

2015

|

issue 4

5

Gene expression of heat shoc kproteins/factors (HSP60, HSP70, HSP90, HSF-1, HSF-3) and antioxidant enzyme activities in heat stressed broilers treated with vitamin C

75%

Albokhadaim I. F., Althnaian T. A., El-Bahr S. M., Albokhadaim I. F., Althnaian T. A., El-Bahr S. M.

Polish Journal of Veterinary Sciences

|

2019

|

issue 3

6

Content of ascorbic acid in common cowslip (Primula veris L.) compared to common foodplants and orange juices

75%

Meos A., Zaharova I., Kask M., Raal A.

Acta Biologica Cracoviensia s. Botanica

|

2017

|

vol. 59

|

issue 1

Refine search results

2 Acta Biochimica Polonica

1 Acta Biologica Cracoviensia s. Botanica

1 Chemical and Process Engineering

1 Ecological Chemistry and Engineering S

1 Polish Journal of Veterinary Sciences

1 2019

1 2017

1 2015

1 2014

1 2013

1 2001

1 Albokhadaim I. F.

1 Althnaian T. A.

1 Ciecierski M.

1 El-Bahr S. M.

1 Gackowski D.

1 Gutowski M.

1 Jawień A.

1 Kask M.

1 Kowalczyk S.

1 Meos A.

1 Oliński R.

1 Raal A.

1 Sarimeseli A.

1 Szopińska D.