Issue 4

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Abid Ali, Khalil-ur-Rahman, Amer Jamil, Nazish Jahan and Ayesha Tahir. Phyto-constituents, DNA protection and cytotoxic potential of Rheum emodi. Current Science Perspectives 1(4) (2015) 102-106

Abstract

The main focus of the current study was to explore antioxidant and toxicological profile of Rheum emodi. The antioxidant activity of R. emodi extract was evaluated using the diphenyl-picrylhydrazine (DPPH) radical scavenging and H2O2 induced oxidative damage. The cytotoxicity of the plant extract was evaluated by hemolytic, brine shrimp lethality and mutagenic activity. Total antioxidant activity increased with increasing amount of the extracts. The percentage inhibition for DPPH ranged from 63 to 86 at concentration 10 and 100 mg/mL. The methanolic extract exhibited DNA protection on concentration dependent manner and complete protective effect was noted at concentration 1000 µL/mL. Toxicological results showed that R. emodi ispotent against hemolytic, brine shrimps and non-mutagenic against standard mutagens that indicated the presence of some bioactive components in the plant and also have significant antioxidant activity that protects DNA against H2O2 induced oxidative damage.The most common constituents of R. emodi are anthraquinone (emodin, physcion, rhein, chrysophanol, aloe-emodin and their glycosides) and stilbene confirmed by performing liquid chromatography mass spectroscopy. These outcomes showed that R.emodi exhibit significant bioactivity.

 

C.P. Ukpaka, E. N. Wami and S. A. Amadi. Effect of pollution on metal corrosion: A case study of carbon steel metal in acidic media  Current Science Perspectives 1(4) (2015) 107-111

Abstract

Corrosion refers to any process involving the determination or degradation of a metal by its environment. Its literally means eating away the metal surfaces and the rate at which metal does depends upon its environmental factors and materials, it returns to its original state. In any system the important environmental factors are humidity and temperature, like temperature rate of corrosion on some physical properties as metal (carbon steel) usually increase, using different samples like hydrochloric acid, sulphuric acid and crude oil like bonny light and bonny medium to determined the rate at which metals can corrode faster, after the experiment it shows that the rate of corrosion is high in sulphuric acid. Maintenance should not only be done at repair stages when pipes have been completely eaten up by corrosion. It should be carried out regularly to ensure line efficiency and lack of failure due to corrosion. Extend of the period of exposure is suggested as this would ensure a broader and more result oriented study.

 

 

Fahad Bashir, Muhammad Ather Nadeem, Asif Tanveer and Tasawer Abbas. 2015. Impact of row spacing and reduced herbicide doses along with adjuvant on weeds in maize (Zea mays L.) Current Science Perspectives 1(4) 112-118

Abstract

Adjuvants have significant role in decreasing the herbicide cost and environmental damage by reducing the herbicides dose. An experiment was conducted at Student Research Farm, Department of Agronomy, University of Agriculture Faisalabad, to assess the impact of row spacing and reduced herbicide doses along with adjuvant on weeds in maize (Zea mays L.). The experiment comprised atrazine + mesotrione + halosulfuran methyl at label dose (719.2 g a.i ha-1); reduced doses of 75% (539.4 g a.i ha-1) and 50% (359.6 g a.i ha-1) alone and in combination with alkyl ether sulphate @ 396.8 ml ha-1 as adjuvant along with weedy check in maize sown at 60 and 75cm row spacing. The results showed that weed biomass and density was reduced by reducing row spacing, however, the grain yield was not affected by row spacing. The most effective treatment in controlling weed, reducing the dry matter of weed and increasing maize grain yield were atrazine + mesotrione + halosulfuron methyl @ 539.4 g a.i. ha-1 (75% of recommended) with adjuvant and atrazine + mesotrione + halosulfuran methyl  @ 719.2 g a.i ha-1 (recommended dose). The results revealed that the dose of atrazine + mesotrione + halosulfuron methyl can be reduced up to 75% by addition of alkyl ether sulphate as adjuvant.