908 research outputs found
Design of a Framework for the Aggregator using Demand Reduction Bid (DRB)
Demand side management (DSM) in smart grid paradigm is an energy management strategy of the grid using advanced data communication and networking. The aggregator, a third party entity, is appearing as a key player in managing the demand during the peak hours between the utility and the consumer. In this work, a general framework is discussed and focuses on the interactional issues between the utility, the aggregator and the consumers. The paper also discusses the role of communication in the context of interaction among the three players. In addition, it also presents the model of the framework which can enable the consumer to effectively participate in the DSM. The proposed model considers the direct load control (DLC) program which uses the concept of demand reduction bid (DRB) in aggregated demand response. Keywords: Aggregator, Demand reduction bid (DRB), Direct load control (DLC), Framewor
BIOLOGICAL SCREENING OF ARAUCARIA COLUMNARIS
Objective: The present research is biological screening of aerial part of Araucaria columnaris (Araucariaceae). There were investigation for their antibacterial, antifungal, phytotoxic and cytotoxic activities of Dichloromethane and methanol extract.Methods: Anti-bacterial, Anti-fungal, cytotoxicity and phytotoxicity activity was performed by Disc diffusion method, Agar tube dilution assay, Brine Shrimp Lethality bioassay and Lemna bioassay respectively.Results: Dichloromethane and methanolic extract exhibited significant phytotoxicity against Lemna minor having Paraquat as standard drug and incubation condition (28ĆĀ±1 ĆĀ°C). None of extracts presented any significant antibacterial and cytotoxic activity having Imipenum and Etoposide as standard drug respectively. Both extract had non-significant antifungal activity but it has been noted that MeOH and DCM extract of Araucaria columnaris showed 10% and 20% inhibition with linear growth at 90 mm and 80 mm respectively, when compared with control; against Fusarium solani and Aspergillus flavus respectively.Conclusion: Araucaria columnaris exhibited significant phytotoxicity bioassay. The phytotoxicty assay is a useful primary screen for weedicide research. Synthetic weedicides are expensive, toxic and non-specific. This study will help to discover the phytotoxic constituents of the plant by isolation, purification and structure elucidation to find out as effective herbicidal.Ć
Assessment of Optimal Production Through Assembly Line-Balancing and Product-Mix Flexibility
Timely accomplishment of production targets is a challenging task in low volumeāhigh variety environment. Assessment of the manufacturing flexibility of a production system assists in achieving the desired objectives. In this research, the operational flexibility of a production system is investigated which operates under the low-volume high-variety production scenario. Prospective dimensions of theproduction flexibility are studied to analyze its interface with the integrated functional units. It was analyzed that with a low-volumeoperational flexibility (OF) varies rationally despite high job varieties. Line-balancing and queuing techniques are applied to ascertain theoptimum productivity. A sensitivity analysis is also performed to evaluate the critical parameters that affect the OF and productivity level.OF index of the production system was estimated by means of the optimized production parameters. A comparative analysis is performedto evaluate the flexibility in conventional and flexible production cells. Analytical and computational results show a close approximationand validate the implemented schemes
Transdermal patches: Design and current approaches to painless drug delivery
Use of transdermal patches can evade many issues associated with oral drug delivery, such as first-pass hepatic metabolism, enzymatic digestion attack, drug hydrolysis and degradation in acidic media, drug fluctuations, and gastrointestinal irritation. This article reviews various transdermal patches available in the market, types, structural components, polymer role, and the required assessment tools. Although transdermal patches have medical applications for smoking cessation, pain relief, osteoporosis, contraception, motion sickness, angina pectoris, and cardiac disorders, advances in formulation development are ongoing to make transdermal patches capable of delivering more challenging drugs. Transdermal patches can be tailored and developed according to the physicochemical properties of active and inactive components, and applicability for long-term use. Therefore, a number of chemical approaches and physical techniques for transdermal patch development are under investigation
Survey of aflatoxins in chillies from Pakistan produced in rural, semi-rural and urban environments
Chilli peppers from Pakistan are consumed locally and also exported. Their quality is compromised by aflatoxins (AF) contamination. AF in chillies from rural, semi-rural and urban areas of the Punjab region of Pakistan were determined. Twenty-three (52.3%), 22 (50%) and 29 (65.9%) samples from rural, semi-rural and urban areas respectively, contained levels of aflatoxins which exceeded the European Union limits of >5 Āµg kg-1 for AFB1 and >10 Āµg kg-1 for total AF that apply to spices. Mean values for AFB1 in ground samples were 23.8, 14.8 and 14.0 Āµg kg-1 for rural, semi-rural and urban areas, respectively. Mean total AF in ground samples were 27.7, 17.7 and 16.2 Āµg kg-1 from equivalent locations. Eleven (50%), 12 (54.5%) and 14 (63.6%) whole samples from rural, semi-rural and urban areas, respectively, contained total levels of AF that exceeded European Union limits. The data indicate that individual localities have particular problems. In conclusion, the concentrations were often greater than the statutory limits set by the European Union.The authors acknowledge the financial support of the Higher Education Commission, Pakistan, under Indigenous PhD fellowship 5000 batch-III (Grant Number 063-00445-Ps3-047). R.R.M.P. is grateful for the FCT framework position: Commitment to Science (C2008-UMIN-HO-CEB-2)
Foliar applied zinc on different growth stages to improves the growth, yield, quality and kernel bio-fortification of fine rice
Zinc (Zn) is an essential needed for the growth and development of plants, however, Zn is continuously increasing in our soils which is decreasing crop production. Further, the crops grown on Zn-deficient soils also contains a low amount of Zn which is also a major reason for Zn deficiency in humans. So, it is mandatory to supply the Zn to fulfil the crop needs with a corresponding increase in grain Zn. Therefore, the present study was performed to determine the impact of different rates of foliar applied Zn at different growth stages on the growth, yield, quality, and Zn bio-fortification of fine rice. The study comprised foliar application of distilled water (control), foliar applied Zn @ 0.5% at stem elongation stage + booting stage, foliar applied Zn @ 1.0% at stem elongation stage + booting stage, foliar applied Zn @ 0.5% at booting stage and milking stage, foliar applied Zn @ 1.0% at booting stage and milking stage, foliar applied Zn @ 0.5% at milking stage + dough stage and applied Zn @ 1.0% at milking stage + dough stage. The results indicated Zn applied different growth stages significantly improved, productivity and Zn bio-fortification of rice crop. The maximum LAI, LAD, CGR, fertile tillers, 1000 KW, kernel yield, biomass yield, HI, chlorophyll concentration, relative water content (RWC), and antioxidant activities were observed with foliar applied Zn (0.5%) at booting and milking stage and lowest values of all these traits were observed in control. Likewise, the maximum kernel protein, amylose, kernel length and width, and grain Zn concentration was Zn (0.5%) at the booting and milking stage, and minimum kernel protein, amylose, kernel length, and width, and grain Zn concentration was noted in control. The current study findings suggested that foliar-applied Zn (0.5%) at the booting and milking stage could be an important practice to get better productivity, quality, and grain Zn bio-fortification of rice in semi-arid conditions
Integrative Molecular Analysis of DNA Methylation Dynamics Unveils Molecules with Prognostic Potential in Breast Cancer
DNA methylation acts as a major epigenetic modification in mammals, characterized by the transfer of a methyl group to a cytosine. DNA methylation plays a pivotal role in regulating normal development, and misregulation in cells leads to an abnormal phenotype as is seen in several cancers. Any mutations or expression anomalies of genes encoding regulators of DNA methylation may lead to abnormal expression of critical molecules. A comprehensive genomic study encompassing all the genes related to DNA methylation regulation in relation to breast cancer is lacking. We used genomic and transcriptomic datasets from the Cancer Genome Atlas (TGCA) Pan-Cancer Atlas, Genotype-Tissue Expression (GTEx) and microarray platforms and conducted in silico analysis of all the genes related to DNA methylation with respect to writing, reading and erasing this epigenetic mark. Analysis of mutations was conducted using cBioportal, while Xena and KMPlot were utilized for expression changes and patient survival, respectively. Our study identified multiple mutations in the genes encoding regulators of DNA methylation. The expression profiling of these showed significant differences between normal and disease tissues. Moreover, deregulated expression of some of the genes, namely DNMT3B, MBD1, MBD6, BAZ2B, ZBTB38, KLF4, TET2 and TDG, was correlated with patient prognosis. The current study, to our best knowledge, is the first to provide a comprehensive molecular and genetic profile of DNA methylation machinery genes in breast cancer and identifies DNA methylation machinery as an important determinant of the disease progression. The findings of this study will advance our understanding of the etiology of the disease and may serve to identify alternative targets for novel therapeutic strategies in cancer
Aflatoxin B1 in chilies from the Punjab region, Pakistan
The occurrence of aflatoxin B1 (AFB1) in chilies
from Pakistan was determined by using HPLC in work
undertaken in Pakistan.Whole (n=22) and powdered (n=22)
chilies were analyzed. Sixteen (73.0%) and 19 (86.4%)
samples of whole and ground chilies, respectively, were
contaminated. The mean concentration in powdered chilies
(32.20 Ī¼g/kg) was higher statistically than in whole chilies
(24.69 Ī¼g/kg). Concentrations ranged from 0.00 to 89.56 Ī¼g/
kg for powdered chilies, compared with 0.00ā96.3 Ī¼g/kg for
whole chilies. The limits of detection and quantification were
0.05 Ī¼g/kg and 0.53 Ī¼g/kg, respectively. The concentrations
were high in general and greater than the statutory limit set
by the European Union. There is considerable scope for
improvements in chili production in Pakistan.Higher Education Commission, PakistanFundaĆ§Ć£o para a CiĆŖncia e a Tecnologia (FCT
NS4A protein as a marker of HCV history suggests that different HCV genotypes originally evolved from genotype 1b
<p>Abstract</p> <p>Background</p> <p>The 9.6 kb long RNA genome of Hepatitis C virus (HCV) is under the control of RNA dependent RNA polymerase, an error-prone enzyme, for its transcription and replication. A high rate of mutation has been found to be associated with RNA viruses like HCV. Based on genetic variability, HCV has been classified into 6 different major genotypes and 11 different subtypes. However this classification system does not provide significant information about the origin of the virus, primarily due to high mutation rate at nucleotide level. HCV genome codes for a single polyprotein of about 3011 amino acids which is processed into structural and non-structural proteins inside host cell by viral and cellular proteases.</p> <p>Results</p> <p>We have identified a conserved NS4A protein sequence for HCV genotype 3a reported from four different continents of the world i.e. Europe, America, Australia and Asia. We investigated 346 sequences and compared amino acid composition of NS4A protein of different HCV genotypes through Multiple Sequence Alignment and observed amino acid substitutions C<sub>22</sub>, V<sub>29</sub>, V<sub>30</sub>, V<sub>38</sub>, Q<sub>46 </sub>and Q<sub>47 </sub>in NS4A protein of genotype 1b. Furthermore, we observed C<sub>22 </sub>and V<sub>30 </sub>as more consistent members of NS4A protein of genotype 1a. Similarly Q<sub>46 </sub>and Q<sub>47 </sub>in genotype 5, V<sub>29</sub>, V<sub>30</sub>, Q<sub>46 </sub>and Q<sub>47 </sub>in genotype 4, C<sub>22</sub>, Q<sub>46 </sub>and Q<sub>47 </sub>in genotype 6, C<sub>22</sub>, V<sub>38</sub>, Q<sub>46 </sub>and Q<sub>47 </sub>in genotype 3 and C<sub>22 </sub>in genotype 2 as more consistent members of NS4A protein of these genotypes. So the different amino acids that were introduced as substitutions in NS4A protein of genotype 1 subtype 1b have been retained as consistent members of the NS4A protein of other known genotypes.</p> <p>Conclusion</p> <p>These observations indicate that NS4A protein of different HCV genotypes originally evolved from NS4A protein of genotype 1 subtype 1b, which in turn indicate that HCV genotype 1 subtype 1b established itself earlier in human population and all other known genotypes evolved later as a result of mutations in HCV genotype 1b. These results were further confirmed through phylogenetic analysis by constructing phylogenetic tree using NS4A protein as a phylogenetic marker.</p
ANTIFUNGAL, CYTOTOXIC AND PHYTOTOXICITY OF AERIAL PART OF RANUNCULUS MURICATUS
Objectives: The present research is preliminary biological screening of aerial plant of Ranunculus muricatus (Ranunculaceae). Dichloromethane and methanol extracts of the aerial plant were investigated for their antifungal, phytotoxic and cytotoxic activities.
Methods: Anti-fungal, cytotoxicity and phytotoxicity activities were performed by agar tube dilution assay, brine shrimp lethality bioassay and lemna bioassay respectively. Dichloromethane and methanolic extracts exhibited significant phytotoxicity against Lemna minor having Paraquat as standard drug and incubation condition (28Ā±1ĀŗC).
Results: None of extracts presented any significant cytotoxic activity having Imipenum and Etoposide as standard drug respectively. Both extract had non-significant antifungal activity but it has been noted that methanol extract showed 30% inhibition with linear growth at 70 mm, when compared with control; only against Microsporum canis. Ranunculus muricatus showed significant phytotoxicity.
Conclusion: The phytotoxicty assay is a valuable major screen for weedicide investigation. Additionally, modern studies are currently carried out to identify the allelopathic constituents by isolation, purification and structure elucidation to find out as effective herbicidal.
Peer Review History:
Article received on- 9 September Revised on- 16 September Accepted on- 25 September, Available online 15 November 2016
Academic Editor: Dr. Ali Abdullah Al-yahawi, Al-Razi university, Department of Pharmacy, Yemen, [email protected]
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Received file: Reviewer's Comments:
Average Peer review marks at initial stage: 5.5/10
Average Peer review marks at publication stage: 7.0/10
Reviewer(s) detail:
Dr. Awofisayo, O Abosede, University of Uyo, Nigeria, [email protected]
Prof. Dr. Ali Gamal Ahmed Al-kaf, Sana'a university, Yemen, [email protected]
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