检索结果-南通市图书馆

Attenuation of Collagen Induced Arthritis by Centella asiatica Methanol Fraction via Modulation of Cytokines and Oxidative Stress

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2014年第12期27卷 926-938页

作者： Shikha Sharma ritu gupta Sonu Chand Thaku Centre for Interdisciplinary Research in Basic Sciences Jamia Millia Islamia Lab Oncology All India Institute of Medical Sciences

Objective To investigate the anti-inflammatory, antioxidant and anti-arthritic effects of Centello asiatica methanolfraction （CAME） on collagen-induced arthritis （ClA）, an animal model of rheumatoid arthritis. Methods Arthritis was induced in female wistar rats by immunization with porcine type II collagen. The CIA rats were treated orally with CaME （50, 150, and 250 mg/kg/day） for 15 d （beginning on day 21 of the experimental period）. The clinical, histological, biochemical, and immunological parameters were assessed. Results CaME treatment （150 and 250 mg/kg） significantly attenuated the severity of CIA and reduced the synovial inflammation, cartilage erosion, and bone erosion as evident from both histological and radiographic data. The escalated plasma levels of pro-inflammatory cytokines TNF-α, IL-1β, IL-6, and IL-12 alongwith nitric oxide in CIA rats decreased significantly on CaME treatment. The serum levels of type-Ⅱ collagen antibody were significantly lower in rats of CaME （150 and 250 mg/kg） treated group than those in the arthritic group. Furthermore, by inhibiting the above mediators, CaME also contributed towards the reversal of the disturbed antioxidant levels and peroxidative damage. Conclusion Our results clearly indicate that oral administration of CaME suppresses joint inflammation, cytokine expression as well as antioxidant imbalance, thereby contributing to an amelioration of arthritis severity in CIA rats.

关键词： Centella asiatica Collagen-Induced arthritis Inflammation Oxidative stress Antioxidants Anti-Inflammatory

An Unusual Cause of Hepatic Portal Venous Gas

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Case Reports in Clinical Medicine 2014年第5期3卷 267-271页

作者： Nizar Talaat ritu gupta Oakwood Hospital and Medical Center Dearborn USA

A 27-years-old female with history of venous thromboembolism secondary to Lupus anticoagulant presented with sudden onset of chest pain and dyspnea. A CT angiogram of the chest showed superior vena caval (SVC) obstruction with anterior chest wall venous collaterals and hepatic portal vein gas (HPVG), which resolved without intervention on a repeated CT-scan of the abdomen. Previously, HPVG was considered to be a dangerous radiologic sign, however with the advancement in imaging technology more benign causes are being identified. This case highlights that this finding alone, if found, does not indicate aggressive management and that clinical correlation should be considered if found.

关键词： Hepatic Portal Venous Gas Superior Vena Cava Syndrome Liver Imaging

A Simulation Software for the Prediction of Thermal and Mechanical Properties of Wood Plastic Composites

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Technology and Application 2013年第1期4卷 1-5页

作者： ritu gupta Norrozila Binti Sulaiman Arun gupta M.D.H. Beg Faculty of Computer Science and Software Engineering University Malaysia Pahang Pahang 26300 Kuantan Malaysia Faculty of Chemical and Natural Resources Engineering University Malaysia Pahang Pahang 26300 Kuantan Malaysia

Modelling and simulation has become an important tool in research and development. Simulation models are used to develop better understanding of the internal properties and impact of various parameters on the final quality of the product or process. Simulation model reduces the number of experiments and saves the wastage of material, time and money and are widely used in automobile industry, aircrafts manufacturing, process engineering, training for military, health care sector and many more. Wood Plastic Composite （WPC） is a bio-composite made by mixing wood fibers and plastic granules together at high temperature by compression molding or injection molding. A large quantity of WPC is rejected due to poor quality and low mechanical strength. There is a need to improve the understanding of the wood plastic composites, with both theoretical and experimental analysis. The impact of various parameters and processing conditions on the final product is not known to the industry people, due to less simulation models in this field. A new simulation software WPC Soft is developed to predict the mechanical and thermal properties of WPC. The software can predict the mechanical and thermal properties of WPC. The simulation results were validated with the experimental results and it was observed that the predicted values are quite close to the experimental values and with the further refining of the model, prediction can be further improved. The present simulation software can be easily used by the industry people and it requires very little knowledge of computers or modeling for its operation.

关键词： Wood plastic composite simulation software heat transfer mechanical properties.

Hybrid Image Compression-Encryption Scheme Based on Multilayer Stacked Autoencoder and Logistic Map

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Communications 2022年第1期19卷 238-252页

作者： Neetu gupta ritu Vijay Computer Science&Engineering Department Banasthali VidyapithBanasthaliIndia Department of Electronics Engineering Banasthali VidyapithBanasthaliIndia.

Secure transmission of images over a communication channel, with limited data transfer capacity, possesses compression and encryption schemes. A deep learning based hybrid image compression-encryption scheme is proposed by combining stacked auto-encoder with the logistic map. The proposed structure of stacked autoencoder has seven multiple layers, and back propagation algorithm is intended to extend vector portrayal of information into lower vector space. The randomly generated key is used to set initial conditions and control parameters of logistic map. Subsequently, compressed image is encrypted by substituting and scrambling of pixel sequences using key stream sequences generated from logistic *** proposed algorithms are experimentally tested over five standard grayscale images. Compression and encryption efficiency of proposed algorithms are evaluated and analyzed based on peak signal to noise ratio(PSNR), mean square error(MSE), structural similarity index metrics(SSIM) and statistical,differential, entropy analysis respectively. Simulation results show that proposed algorithms provide high quality reconstructed images with excellent levels of security during transmission..

关键词： compression-encryption stacked autoencoder chaotic system back propagation algorithm logistic map

Colloidal lead-free Cs_(2)AgBiBr_(6)double perovskite nanocrystals:Synthesis,uniform thin-film fabrication,and application in solution-processed solar cells

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nano Research 2021年第4期14卷 1126-1134页

作者： Razi Ahmad Gautam Virender Nutan Dinesh Singh Govind gupta Udit Soni Sameer Sapra ritu Srivastava Advanced Materials and Devices Metrology Division CSIR-National Physical LaboratoryDr.K.S.Krishnan RoadNew Delhi-110012India Indian Reference Materials Division CSIR-National Physical LaboratoryDr.K.S.Krishnan RoadNew Delhi-110012India Department of Biotechnology TERI School of Advanced studiesNew Delhi 110070India Department ofChemistryy Indian Institute of Technology Delhi New Delhi 110016India Regional Centre of Advanced Technologies and Materials Faculty of SciencePalacky University OlomoucSlechtitelu 2778371 OlomoucCzech Republic

Recently developed lead-free double perovskite nanocrystals(NCs)have been proposed for the possible application in solutionprocessed optoelectronic ***,the optoelectronic applications of double perovskite NCs have been hampered due to the structural and chemical instability in the presence of polar ***,we report a facile strategy for the synthesis and purification of Cs_(2)AgBiBr_(6)double perovskite NCs that remained stable even after washing with polar *** is realized with our efficient colloidal route to synthesize Cs_(2)AgBiBr_(6)NCs that involve stable and strongly coordinated precursor such as silvertrioctyl phosphine complex together with bismuth neodecanoate,which leads to a significantly improved chemical and colloidal *** layer-by-layer solid-state ligand exchange technique,a compact and crack-free thin film of Cs_(2)AgBiBr_(6)NCs were ***,perovskite solar cells consisting of Cs_(2)AgBiBr_(6)as an absorber layer were fabricated and tested.

关键词： double perovskite nanocrystals colloidal and chemical stability thin film solar cells

Numerical analysis approach for models of COVID-19 and other epidemics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Modeling, Simulation, and Scientific Computing 2021年第3期12卷 40-62页

作者： ritu Yogesh gupta Department of Mathematics Jaypee Institute of Information Technology A-10 Sector-62Noida-201309Uttar PradeshIndi

The world wide spread of COVID-19 epidemic has instigated an unprecedented demand and supply of research related to this *** with medical research for treatment and cure of the pandemic,efficient mathematical modeling of epidemics is the need of ***,this paper depicts a detailed and comprehensive compendium of various numerical methods used for infectious diseases modeling during last 14 years including the very recent work done for COVID-19 *** gives researchers a good insight about past work done,present efforts and future scope of numerical analysis methods for epidemic ***,this paper also proposes its numerical analysis approach based on Adomian decomposition method(ADM)for generalized SEIR model of *** proposed method is shown to give very accurate numerical results.

关键词： COVID-19 epidemic model numerical methods Adomian decomposition method(ADM)

Bilateral facial weakness following dengue fever

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neuroimmunology and Neuroinflammation 2016年第1期3卷 63-64页

作者： Samir Patel Rajeev Ranjan ritu Verma C.S.Agrawal Pooja gupta Department of Neurology Sir Ganga Ram HospitalNew Delhi 110060India Department of Nuclear Medicine Sir Ganga Ram HospitalNew Delhi 110060India

Dengue,an acute viral disease transmitted by Aedes mosquitoes,is highly endemic in many tropical and subtropical areas of the *** has a wide clinical spectrum,ranging from mild clinical febrile illness to severe life-threatening conditions like dengue hemorrhagic fever and dengue shock *** complications of dengue infection have been observed more frequently in the recent *** are widespread and may involve almost all parts of nervous system through various pathogenic *** report a case of a 30-year old male who developed bilateral facial weakness after dengue fever.

关键词： Bilateral facial weakness dengue fever

Isolated breast metastasis mimicking as second primary cancer-a case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Cancer Metastasis and Treatment 2016年第1期2卷 391-395页

作者： Manjari Shah Umang Mithal Sandeep Agarwal Sweety gupta Disha Tiwari Shashank Srinivasan Asheesh Jain ritu Chandra Department of Radiation Oncology Max HospitalVaishali 201012Delhi NCRIndia Department of Surgical Oncology Max HospitalVaishali 201012Delhi NCRIndia Department of Radiation oncology King George Medical UniversityLucknow 226003Uttar PradeshIndia Consulting Histopathologist Asheesh Pathology LabUttar Pradesh 250002India

Primary carcinoma of breast is common but breast is a rare site of metastasis and metastases from extramammary sites are even *** to breast from rectal carcinoma is very unusual and till now 19 cases of breast secondaries from colorectal carcinoma have been reported in literature which include 14 cases where the primary site was colon and remaining 5 were from the *** the authors report a case of adenocarcinoma anorectum who had completed treatment and after 4 months developed a lump in her left breast which was *** lesions of breast are usually part of a widely disseminated disease but this case presented as a solitary breast metastasis which mimicked as second primary cancer of the breast.

关键词： Isolated breast metastasis second primary carcinoma of breast carcinoma anorectum

Compression of MR Images Using DWT by Comparing RGB and YCbCr Color Spaces

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Signal and Information Processing 2013年第4期4卷 364-369页

作者： Agrawal Jayprkash ritu Vijay Department of Electronics and Communication Engineering Jagnnath Gupta Institute of Engineering and Technology Jaipur India

This paper consists of a lossy image compression algorithm dedicated to the medical images doing comparison of RGB and YCbCr color space. Several lossy/lossless transform coding techniques are used for medical image compression. Discrete Wavelet Transform (DWT) is one such widely used technique. After a preprocessing step (remove the mean and RGB to YCbCr transformation), the DWT is applied and followed by the bisection method including thresholding, the quantization, dequantization, the Inverse Discrete Wavelet Transform (IDWT), YCbCr to RGB transform of mean recovering. To obtain the best compression ratio (CR), the next step encoding algorithm is used for compressing the input medical image into three matrices and forward to DWT block a corresponding containing the maximum possible of run of zeros at its end. The last step decoding algorithm is used to decompress the image using IDWT that is applied to get three matrices of medical image.

关键词： Magnetic Resonance Image (MRI) RGB YCbCr Transform Block-Based DWT Transform Coding