The primary aim of the current study was to

evaluate and compare antioxidant activity in

leaves and flowers extracts of arbutus pavarii.

For the purpose, the antioxidant potential of

crude methanol extracts of arbutus pavarii was

screened in vitro using reducing power,

phosphor molybdenum assay, and radical

scavenging activity by employing DPPH, NO,

.OH methods as well as ferric thiocyanate (FTC)

and thiobarbituric acid (TBA) tests to confirm

the antioxidant potential of these extracts.

Resultantly, it was confirmed that the leaves

extract (LE) has displayed higher reducing

ability compared with flowers extract (FE). The

maximum antioxidant activity was found it in

leaves methanol extract (199.38±12.73 mg of

ascorbic acid/g of dry weight). The Methanolic

LE was able to reduce the DPPH concentration

with an IC50 of 1.09 ± mg/mL, which was

noticeable stronger (P < 0.01) than that of the

positive control (ascorbic acid), (IC50 = 0.01 ±

1.6 mg/mL) and FE (IC50= 1.25 ± mg/mL) as

well. The LE showed slightly inhibited .OH

radical (IC50, 0.78 mg/mL) compared with FE

(IC50, 0.91 mg/ml). The obtained results of this

investigation indicated the usefulness of

utilization of arbutus pavarii leaves as a reliable

source of antioxidants for nutritive and

industrial purposes.

In this present work, the effect of variation of parts (pulp and peel) on photochemical 

compounds such as phenolics and flavonoids content of the banana flours were 

studied. The results exhibited that different varieties did exhibit significant differences 

on TPC as well as TFC which means that different sample yielded different values of 

TPC and TFC. The TPC was determined in ethanolic extracts of banana peel and pulp 

flour. The TPC was found to be about 0.40 mg/ml in banana peel and about 0.33

mg/ml in banana pulp. Thus, it is clear that the TPC was higher in the peel than in the 

pulp, while the total flavonoids content was determined in methanolic extracts of 

banana peel and pulp flour. The results showed that TFC was higher in banana peel 

(0.37 mg/ml) than in banana pulp (0.20 mg/ml). 

Key words: banana, catechol , quercetin, total flavonoids, total phenolics.

International klhgyhs

The study has been aimed to evaluate and compare the antioxidant 

activity in peel and pulp extracts of banana. The effect of variation of banana parts on 

the antioxidant activity showed different values. The DPPH free radical scavenging 

activity of banana parts (peel and pulp) were determined using different extracts 

(methanol, ethyl acetate and ethanol). Results represent that all extracts showed very 

good activity at highest concentration 800µg/ml. Among the all extracts, methanol 

extract of pulp exhibited highest free radical scavenging 91.27% at 800µg/ml.

Maximum reducing activity of banana peel was observed at 800µg/ml and showing 

0.260 in methanol. The data showed that, the entire sample increased their reducing 

ability when the concentration of extract increased. There was slight difference in 

reducing ability of all the three extracts. . The study suggests that peel and pulp 

extracts of banana could be useful to combat free radical mediated diseases.

The present work reports a facile approach to the one-pot solution growth of vertically

aligned, doped ZnO nanorod (NR) arrays by chemical bath deposition (CBD). The effects of

dopant ions on the final morphologies, electronic band structures and donor densities of

ZnO NRs were examined. With the introduction of dopants, the optical band gap energies

of the samples were reduced. The photoelectrochemical (PEC) water splitting performances

of the doped ZnO NRs were tested. When compared with pristine ZnO NRs, the doped ZnO

NRs demonstrated an improvement of at least 15% in the PEC water splitting activity. Nadoped ZnO NRs was the most efficient photoanode, where its photocurrent density was 2.1

times greater than that of pristine ZnO NRs. The mechanism for improved PEC performance was proposed