46 research outputs found

    Purification, characterization and application of bromelain from Ananas comosus

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    Bromelain is a major protease, isolated from pineapple (Ananas comosus). Bromelain is accumulated in the entire plant to a different extent and properties depending on its source. In the present study, Bromelain was extracted from all parts of pineapple using sodium citrate buffer. Bromelain was filtered, centrifuged and used for further studies. After the determination of protease activity and protein content, the Core and Pulp extract of A.comosus was chosen using gelatin as the substrate. The Bromelain was purified by precipitation and dialysis. Then SDS-PAGE was performed in order to determine the molecular size of the obtained protein. Then the effectiveness of Bromelain as an anti-browning agent, extracted and purified from pineapple Core and Pulp was determined. The study showed that Bromelain is a better anti-browning agent when compared with some of the available commercial anti-browning agents. Further, the application of Bromelain was tested by stain removal, compared to the positive control, the ability of stain-removing property for the produced enzyme was observed to be good. Immobilized Bromelain prepared using calcium alginate beads and its stability and characters were noted

    Standardization of the method for estimation of ethambutol in pharmaceutical preparations and biological fluid

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    A simple column chromatographic method for determination of ethambutol (EMB) in pharmaceutical preparations containing EMB in combination with other anti-TB drugs is presented. The method involved extraction of EMB into an organic solvent. followed by basification and column chromatographic separation on Amberlite CG 50 (100-200 mesh) and elution with suitable eluants and estimation at a wavelength of 270 nm. The assay was linear from 25 to 400 μg/ml. The relative standard deviations of intra and inter day assays were lower than 5%. Ethambutol was recovered from human urine quantitatively and stable for a period of atleast one week in urine stored at-20°C

    Enabling the Acceleration of Electric Vehicle Adoption

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    Electric vehicle uptake is accelerating as we move from early adopters to the majority. To reach its net-zero target, the UK Government will need to support this transition. Sufficient, accessible and affordable charging will be key to unlocking EV adoption for groups who will not be able to follow the current charging model. A lack of charging infrastructure for regular use remains a barrier to adoption, particularly for residents who can’t charge at home. The first step in removing this barrier is identifying where such residents live and the most valuable locations for charging solutions. Policy to reduce the cost of electricity for charge point operators and incentivise DSOs to offer affordable network upgrades would greatly improve the financial viability of charge points to service those without off-street parking

    The economics of heat pumps and the (un)intended consequences of government policy

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    In Europe, space and water heating account for approximately 80% of final energy use in the domestic sector. For many European countries the electrification of heat provision, via heat pumps (HPs), provides a promising decarbonisation pathway. The UK is no different, but recently concerns have been raised about the financial attractiveness of HPs given how, through various policy choices, taxes and levies are applied more heavily on electricity bills than gas bills. In this paper, we critically examine this argument by assessing the financial attractiveness of HPs across their lifetime for a typical UK household and within the current UK tax and regulatory regime. The results suggest taxes and levies do weaken the economic case for HPs: their current distribution having an unintended impact on the economics of HPs. Nonetheless, they are not the only reason for HPs comparative financial disadvantage. Upfront costs and HP performance, both influence the extent to which taxes and levies impact the economics of HPs. The results have implications for the future deployment of HPs in the UK and point towards policies to increase deployment (to drive down costs) and increase HP performance as being important

    Enabling the acceleration of electric vehicle adoption

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    Electric vehicle uptake is accelerating as we move from early adopters to the majority. To reach its net-zero target, the UK Government will need to support this transition. Sufficient, accessible and affordable charging will be key to unlocking EV adoption for groups who will not be able to follow the current charging model. A lack of charging infrastructure for regular use remains a barrier to adoption, particularly for residents who can&rsquo;t charge at home. The first step in removing this barrier is identifying where such residents live and the most valuable locations for charging solutions. Policy to reduce the cost of electricity for charge point operators and incentivise DSOs to offer affordable network upgrades would greatly improve the financial viability of charge points to service those without off-street parking. </ul

    Modeling and Detection of Geospatial Objects Using Texture Motifs

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    Identification of glucosyl transferase inhibitors from Psidium guajava against Streptococcus mutans in dental caries

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    Dental caries is a multi factorial disease that starts with microbiological shifts affected by salivary flow, composition, exposure to fluoride, consumption of dietary sugars, and preventive behaviours. The Streptococcus mutans (S. mutans) is an initiator of caries because there is a variety of a virulence factor unique to the bacterium that has been isolated and plays an important role in caries formation. The aim of the present study is to identify the beneficial effect of bioactive compounds in Psidium guajava (P. guajava) and its inhibitory role against S. mutans in dental caries. The methanolic extract was used for analysis of GC-MS for the identification of bioactive compounds. The results confirm the existence of 7 different compounds. The identified bioactive compounds were corynan-17-ol, 18,19-didehydro-10-methyoxy-acetate, Copaene, 3Bicyclo(5.2.0)nonane, 2-methylene-4,8,8-trimethyl-4-vinyl,Azulene,1,2,3a,4,5,6,7-octahydro-1,4-dimethyl-7-methylethenyl) [1R- (1a,3aa′,4a′,7a′)], α-Caryophyllene, Alloaromadendrene oxide-(1) and Androstan-17-one, 3-ethyl-3-hydroxy-, (5a). The saliva of dental caries during and after treatment of aqueous leaf extract was used for the analysis of bacterial load and determining the activity of Glucosyl transferase (GTF). The result obtained at different time intervals, showed significant decrease (P < 0.01) in the bacterial load of saliva on P. guajava treatment. The molecular docking studies identified the interaction between GTF and the bioactive compounds of P. guajava. The anticariogenic active compounds interacted through active sites of sucrose and inhibit the formation of glucan. The study suggested that it could be maximized the anticariogenic effect of the selected medicinal plant, and further focus is needed to identify the combined plant extract to explore the additional protection against dental caries. Keywords: Glucosyl transferase, Psidium guajava, Streptococcus mutans, Dental caries, Cariogenic plaqu
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