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Sheikh Imranudin Sheikh-Ali,Akil Ahmad,Siti-Hamidah Mohd-Setapar,Zainul Akmal Zakaria,Norfahana Abdul-Talib,Aidee Kamal Khamis,Md Enamul Hoque 한국미생물학회 2014 The journal of microbiology Vol.52 No.10
The contamination of food and feed by Aspergillus has becomea global issue with a significant worldwide economicimpact. The growth of Aspergillus is unfavourable to thedevelopment of food and feed industries, where the problemshappen mostly due to the presence of mycotoxins, which is atoxic metabolite secreted by most Aspergillus groups. Moreover,fungi can produce spores that cause diseases, such asallergies and asthma, especially to human beings. High temperature,high moisture, retarded crops, and poor food storageconditions encourage the growth of mold, as well asthe development of mycotoxins. A variety of chemical, biological,and physical strategies have been developed to controlthe production of mycotoxins. A biological approach,using a mixed culture comprised of Saccharomyces cerevisiaeand Lactobacillus rhamnosus resulted in the inhibition of thegrowth of fungi when inoculated into fermented food. Theresults reveal that the mixed culture has a higher potential(37.08%) to inhibit the growth of Aspergillus flavus (producerof Aflatoxin) compared to either single culture, L. rhamnosusNRRL B-442 and S. cerevisiae, which inhibit the growth by63.07% and 64.24%, respectively.
Sheikh Tania,Raghad Rowaida 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.3
In advanced image processing, aerial image processing plays an important role in object extraction such as building extraction, road detection etc. The aerial images captured are usually bound to suffer from Gaussian noise, salt and pepper noise, speckle noise etc. Therefore obtaining of aerial image with high accuracy is very difficult task. A flawless aerial image is inevitable for further object extraction process. There are a number of filtering techniques to detach the noise for preserving the integrity of captured aerial image. In this paper we have applied mean filter, median filter, wiener filter, wavelet transform and curvelet transform for removal of various level of Gaussian noise, salt and pepper noise and speckle noise added separately in an aerial image. The performance of both the transforms and filtering methods are compared in terms of Peak Signal to Noise Ratio (PSNR), Mean Square Error (MSE).
COVID-19 prediction models: a systematic literature review
Sheikh Muzaffar Shakeel,Nithya Sathya Kumar,Pranita Pandurang Madalli,Rashmi Srinivasaiah,Devappa Renuka Swamy 질병관리본부 2021 Osong Public Health and Research Persptectives Vol.12 No.4
As the world grapples with the problem of the coronavirus disease 2019 (COVID-19) pandemic and its devastating effects, scientific groups are working towards solutions to mitigate the effects of the virus. This paper aimed to collate information on COVID-19 prediction models. A systematic literature review is reported, based on a manual search of 1,196 papers published from January to December 2020. Various databases such as Google Scholar, Web of Science, and Scopus were searched. The search strategy was formulated and refined in terms of subject keywords, geographical purview, and time period according to a predefined protocol. Visualizations were created to present the data trends according to different parameters. The results of this systematic literature review show that the study findings are critically relevant for both healthcare managers and prediction model developers. Healthcare managers can choose the best prediction model output for their organization or process management. Meanwhile, prediction model developers and managers can identify the lacunae in their models and improve their data-driven approaches.
Social and political impacts of renewable energy: Literature review
Sheikh, N.J.,Kocaoglu, D.F.,Lutzenhiser, L. American Elsevier 2016 TECHNOLOGICAL FORECASTING AND SOCIAL CHANGE Vol.108 No.-
The social and political perspectives are important considerations for renewable energy technologies. These perspectives may have impacts that are positive, negative, or a combination. Positive impacts can improve the adoption of certain technologies. Adverse impacts can reduce the intended benefits or even threaten the viability of a technologically promising technology. Since societal and political impacts are typically tightly inter-related they are being considered together. A literature review was performed to determine the criteria that are elements of the social and political perspectives. The literature review was supplemented with a review by experts to capture any additional criteria that were not specifically mentioned. The results are presented in this paper as taxonomy of criteria and sub-criteria for these perspectives. Over sixty criteria and sub-criteria are identified for the social and political perspectives. The perspectives and their criteria are important for decision making by policy makers, electric utilities, technology manufacturers, and research institutes. Having comprehensive sets of criteria can assist decision makers in ensuring that important aspects and impacts of the social and political perspectives are given due consideration and are not inadvertently omitted.
Sheikh, Faheem A,Ju, Hyung Woo,Moon, Bo Mi,Park, Hyun Jung,Kim, Jung Ho,Lee, Ok Joo,Park, Chan Hum Springer 2013 Nanoscale research letters Vol.8 No.1
<P>Electrospinning technique is commonly used to produce micro- and/or nanofibers, which utilizes electrical forces to produce polymeric fibers with diameters ranging from several micrometers down to few nanometers. Desirably, electrospun materials provide highly porous structure and appropriate pore size for initial cell attachment and proliferation and thereby enable the exchange of nutrients. Composite nanofibers consisting of silk and hydroxyapatite nanoparticles (HAp) (NPs) had been considered as an excellent choice due to their efficient biocompatibility and bone-mimicking properties. To prepare these nanofiber composites, it requires the use of acidic solutions which have serious consequences on the nature of both silk and HAp NPs. It is ideal to create these nanofibers using aqueous solutions in which the physicochemical nature of both materials can be retained. However, to create those nanofibers is often difficult to obtain because of the fact that aqueous solutions of silk and HAp NPs can precipitate before they can be ejected into fibers during the electrospinning process. In this work, we had successfully used a three-way stopcock connector to mix the two different solutions, and very shortly, this solution is ejected out to form nanofibers due to electric fields. Different blend ratios consisting HAp NPs had been electrospun into nanofibers. The physicochemical aspects of fabricated nanofiber had been characterized by different state of techniques like that of FE-SEM, EDS, TEM, TEM-EDS, TGA, FT-IR, and XRD. These characterization techniques revealed that HAp NPs can be easily introduced in silk nanofibers using a stopcock connector, and this method favorably preserves the intact nature of silk fibroin and HAp NPs. Moreover, nanofibers obtained by this strategy were tested for cell toxicity and cell attachment studies using NIH 3 T3 fibroblasts which indicated non-toxic behavior and good attachment of cells upon incubation in the presence of nanofibers.</P>
Sheikh Arshad Saeed,Sagheer Ahmed 대한약학회 2006 Archives of Pharmacal Research Vol.29 No.11
The objective was to devise an animal model of myocardial infarction (MI) against which cardioprotective drugs might be tested. We describe the effects of nimesulide, a COX experience with development and validation of such a model. The rabbit was chosen in preference to rodents because its heart and cardiac circulation more closely resemble those of human. Thus, the cardiovascular system of anaesthetized male rabbits, 1 to 1.5 kg (n=11), was stressed by a single bolus intravenous injection of isoprenaline (ISP), 65 mg/kg. The effects of the injection were followed for sixteen days and were evaluated in four ways: 1) measurements of creatinine kinase isozyme and troponin-I (TPI) in serum 2) Electrocardiographic (ECG) changes (ST elevation and Q wave development) 3) Cardiac histopathology observed in tissue sections of the isolated of the heart. The histopathological analysis showed that rabbit heart on 2nd day after ISP injection showed changes of coagulation necrosis. Day 4 total coagulation with the loss of nuclear and striation associated with heavy interstitial infiltrate of neutrophils was found. Day 8 after infarction showed collagen deposition with capillary channels in between the remaining islands of myocytes in the infarcted area. On the 16th day scarring was complete. Coronary perfusion rates (CPR) and heart rate (HR) of the infarcted and nimesulide (a COX-2 inhibitor) treated rabbits displayed significant improvement (n=11) on each corresponding day after infarction as compared to the infarcted and saline treated rabbits (P<0.05). All four indices revealed similarities with effects commonly associated with MI in humans.