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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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The synergistic effect of boric acid and ammonium polyphosphate on the thermal degradation and flammability of pine-needles

100%
Li L., Hu H., Guo C., Hu H.
Drewno. Prace Naukowe. Doniesienia. Komunikaty
|
2014
|
tom 57
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nr 193
The synergistic effect of ammonium polyphosphate (APP) and boric acid (BA) on the flame retardancy and thermal degradation of pine needles was investigated. Thermogravimetric analysis (TGA) showed that the presence of an ammoniumpolyphosphate and boric acid system increased the char residue and decreased the pyrolysis temperature of the pine needles. The derivative thermogravimetric analysis (DTG) showed that the ammonium polyphosphate and boric acid had shifted the degradation peaks of the pine needles to lower temperatures. The cone calorimetry test results showed that the values of HRR, THR, SPR, TSP and the mass loss (%) of the pine needles treated with ammonium polyphosphate and boric acid (APP/BA = 3/2)were significantly lower than the other samples. Therefore, the APP and BA system had a better effect on the pine needles overall than the APP alone.
2

Boric acid as a protector against paclitaxel genotoxicity

100%
Turkez H., Tatar A., Hacimuftuoglu A., Ozdemir E.
Acta Biochimica Polonica
|
2010
|
tom 57
|
nr 1
95-97
 Paclitaxel (PAC) is an anticancer drug used for treatments of breast, ovarian and lung cancers. However, little data is; available in the literature on its potential genotoxicity on healthy human cells. On the other hand, boron deficiency and supplementation exert important biological effects in human and animal tissues. The biological effects of dietary boron are defined, but its interaction with PAC is not known for therapeutic uses. The aim of the present study was to determine whether boric acid (BA) confer a protection against PAC genotoxicity. After the application of PAC (10 or 20 μg/l) and BA (2.5 or 5 mg/l), the genotoxic effects were assessed by sister chromatid exchange (SCE) and micronucleus (MN) tests in human blood cultures. We also analyzed nuclear division index (NDI) in peripheral lymphocytes. Our results showed that PAC significantly (P < 0.05) increased the frequencies of SCEs and the formations of MNs in peripheral lymphocytes as compared to controls. PAC decreased the nuclear division index in lymphocyte cultures. Boric acid did not show cytotoxic or genotoxic effects at the concentrations tested. Furthermore, the PAC-induced increases in the genotoxicity and cytotoxicity indices were diminished by the addition of BA. The present study suggests for the first time that BA can prevent the genotoxicity of PAC on human lymphocytes.
3
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Microrhizome induction and curcumin accumulation in Curcuma aromatica Salisb.

100%
Ho N. T. H., Thien P. T., Nhat Q. H., Hoang A. N., Ngoc T. L. T., Bao L. N. D., Minh N. N. T., Bich P. T. T.
Acta Agrobotanica
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2022
|
tom 75
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nr 1
4

Competitive inhibitors of free and chitosan-immobilized urease

100%
Zaborska W.
Acta Biochimica Polonica
|
1995
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tom 42
|
nr 1
The influence of four inhibitors: boric acid, thioglycolic acid, sodium fluoride and acetohydroxamic acid on the activity of urease, both in the native form and immo­bilized covalently on glutaraldehyde-pretTeated chitosan membrane, was studied. Urea hydrolysis was carried out in phosphate buffer, pH 7, at 25°C at urea concen­tration of 50 mM. The immobilized urease was more resistant than the native one to the action of all the investigated inhibitors, except boric acid. This property of the enzyme offers a possibility of its practical application.
5

Ureolytic activity of Nitellopsis obtusa [Characeae]

100%
Karcz W., Krajewska B., Zaborska W.
Acta Physiologiae Plantarum
|
2001
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tom 23
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nr 3
6

The studies on redistribution of boron in apple trees as a result of leaf boron application

80%
Wojcik P.
Acta Agrobotanica
|
1998
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tom 51
|
nr 1-2
147-155
Redistribution of boron (B) within apple trees (Malus domestica Borkh.) as a result of leaf B application was examined. The experiments were carried out in a greenhouse on M.26 apple rootstock and in field conditions on five-year-old 'Elstar' and 'Szampion' apple trees grafted on M.26 rootstock. Boron was applied in a form of boric acid solution. It was found that leaf B application resulted in movement of B to leaves, flowers and apple fruits untreated with B. These results clearly showed that B was retranslocated within apple tree. The retranslocation of B within apple trees took place when leaf B applications were done both in summer and autumn. Additionally, it was observed that B from leaf application had particularly high ability of movement within plant at insufficient B content (0.2pM) in solution. Generally, these data indicated that B within apple trees was transported in phloem, however mechanism of this phenomenon has not been well known yet. Thus, leaf B application of apple trees can be more successful treatment in reduction of B deficiency in plants compared to soil B application.
7

Badania wlasciwosci farmakodynamicznych roztworu kwasu borowego

80%
Drobnik M., Latour T.
Roczniki Państwowego Zakładu Higieny
|
2001
|
tom 52
|
nr 4
329-336
W badaniach doświadczalnych na zwierzętach laboratoryjnych określono wpływ roztworu H3BO3 zastosowanego doustnie, na niektóre parametry gospodarki węglowodanowej, tłuszczowej, białkowej, wodno-elektrolitowej, morfologię oraz równowagę kwasowo-zasadową we krwi. Zbadano oddziaływanie roztworu kwasu na mięśnie gładkie jelita, wydalanie moczu i żółci
8
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Effects of boron on yield, quality and leaf nutrients of Isabella (Vitis labrusca L.) grape cultivar

80%
Bilir Ekbic H., Gokdemir N., Erdem H.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2018
|
tom 17
|
nr 1
The present study was conducted in 2014 vegetation season in a vineyard of Giresun Hazelnut Research Institute. Isabella (Vitis labrusca L.) grape cultivar were treated with four different boric acid (H3BO3) doses (control, 0.1%, 0.2%, 0.3%) at two different periods (a week before and after full-bloom). The effects of foliar boron treatments on yield, quality and leaf nutrients were investigated. Boric acid treatments positively influenced cluster weight, width and volumes and increasing values were observed with increasing boron doses. Boric acid treatments also influenced berry homogeneity and yielded more homogeneous appearance. Chlorophyll contents increased with increasing boron treatments. The greatest yield, cluster length, cluster volume, cluster size, cluster width, berry width and leaf area were obtained from 0.3% boric acid treatments. In general, leaf nitrogen, phosphorus, calcium, magnesium, zinc and copper concentrations increased, but potassium and iron concentrations decreased with increasing boron doses. As compared to control treatment, all treatments had broader leaf sizes and higher chlorophyll contents. Especially 0.3% boric acid treatments had quite positive influences on quality, size and color homogeneity. Considering the nutrients and pH level of experimental soils, it was concluded that foliar nutrient treatments may support plant growth and development and 0.3% boric acid treatments were recommended for high quality and quantity yields in Isabella grape cultivar.
9

Boron retention in soil samples from apple orchards in Grojec and Sandomierz Regions

80%
Wojcik P.
Journal of Fruit and Ornamental Plant Research
|
1998
|
tom 06
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nr 3-4
10

Effect of chemical nutrients on aconitase activity during citric acid fermentation by a mutant strain of Aspergillus niger

80%
Ghosh P., Banik A. K.
Acta Microbiologica Polonica
|
1998
|
tom 47
|
nr 3
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