检索结果-南通市图书馆

Entropically favoured through space charge transfer‘lighted’photosensitizing assemblies for‘metal free’regulated photooxidation of alcohols and aldehydes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Aggregate

Aggregate 2022年第2期3卷 143-153页

作者： Gurpreet Kaur Harpreet Kaur Mandeep Kaur Manoj Kumar vandana bhalla Department of Chemistry Centre of Advance Studies-IIGuru Nanak Dev UniversityAmritsarIndia

Strong acceptor-weak acceptor system FN-TPy has been designed and synthesized,which undergoes solvent dependent self-assembly in mixed aqueous media to generate through space intermolecular charge transfer assemblies.The as-prepared entropically favoured assemblies of FN-TPy exhibit excellent photostability and photosensitizing properties in the assembled state to activate aerial oxygen for efficient generation of reactive oxygen species through Type-I and Type-II pathways.The FN-TPy exhibits excellent potential for regulated oxidation of alcohols and aldehydes under mild reaction conditions(visible light irradiation,aqueous media,room temperature)using aerial oxygen as the‘oxidant’.The present study demonstrates the potential of FN-TPy assemblies to catalyse controlled oxidation of benzyl alcohol to benzoic acid.

关键词： aggregated assemblies molecular oxygen activation oxidations photosensitizer through space charge transfer

Characterization of tumors of jaw:Additive value of contrast enhancement and dual-energy computed tomography

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Radiology 2024年第4期16卷 82-93页

作者： Deepak Justine Viswanathan Ashu Seith bhalla Smita Manchanda Ajoy Roychoudhury Deepika Mishra Asit Ranjan Mridha Department of Radiodiagnosis and Interventional Radiology All India Institute of Medical SciencesNew Delhi 110029India Department of Oral and Maxillofacial Surgery All India Institute of Medical SciencesNew Delhi 110029India Department of Oral Pathology and Microbiology All India Institute of Medical SciencesNew Delhi 110029India Department of Pathology All India Institute of Medical SciencesAnsari NagarNew Delhi 110029India

BACKGROUND Currently,the differentiation of jaw tumors is mainly based on the lesion’s morphology rather than the enhancement characteristics,which are important in the differentiation of neoplasms across the body.There is a paucity of literature on the enhancement characteristics of jaw tumors.This is mainly because,even though computed tomography(CT)is used to evaluate these lesions,they are often imaged without intravenous contrast.This study hypothesised that the enhancement characteristics of the solid component of jaw tumors can aid in the differentiation of these lesions in addition to their morphology by dual-energy CT,therefore improving the ability to differentiate between various pathologies.AIM To evaluate the role of contrast enhancement and dual-energy quantitative parameters in CT in the differentiation of jaw tumors.METHODS Fifty-seven patients with jaw tumors underwent contrast-enhanced dual-energy CT.Morphological analysis of the tumor,including the enhancing solid component,was done,followed by quantitative analysis of iodine concentration(IC),water concentration(WC),HU,and normalized IC.The study population was divided into four subgroups based on histopathological analysis-central giant cell granuloma(CGCG),ameloblastoma,odontogenic keratocyst(OKC),and other jaw tumors.A one-way ANOVA test for parametric variables and the Kruskal-Wallis test for nonparametric variables were used.If significant differences were found,a series of independent t-tests or Mann-Whitney U tests were used.RESULTS Ameloblastoma was the most common pathology(n=20),followed by CGCG(n=11)and OKC.CGCG showed a higher mean concentration of all quantitative parameters than ameloblastomas(P<0.05).An IC threshold of 31.35×100μg/cm^(3) had the maximum sensitivity(81.8%)and specificity(65%).Between ameloblastomas and OKC,the former showed a higher mean concentration of all quantitative parameters(P<0.001),however when comparing unilocular ameloblastomas with OKCs,the latter showed significantly higher WC.Also,ameloblastoma had

关键词： Jaw neoplasms Ameloblastomas Dual-energy computed tomography Iodine quantification Mandibular neoplasms Maxillary neoplasms

Fusion of Infrared and Visible Images Using Fuzzy Based Siamese Convolutional Network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第3期70卷 5503-5518页

作者： Kanika bhalla Deepika Koundal Surbhi Bhatia Mohammad Khalid Imam Rahmani Muhammad Tahir Department of Electrical Engineering National Taipei University of TechnologyTaipei10608Taiwan Department Virtualization School of Computer ScienceUniversity of Petroleum&Energy StudiesDehradunIndia College of Computer Science and Information technology King Faisal University36362Saudi Arabia College of Computing and Informatics Saudi Electronic UniversityRiyadh11673Saudi Arabia

Traditional techniques based on image fusion are arduous in integrating complementary or heterogeneous infrared(IR)/visible(VS)images.Dissimilarities in various kind of features in these images are vital to preserve in the single fused image.Hence,simultaneous preservation of both the aspects at the same time is a challenging task.However,most of the existing methods utilize the manual extraction of features;and manual complicated designing of fusion rules resulted in a blurry artifact in the fused image.Therefore,this study has proposed a hybrid algorithm for the integration of multi-features among two heterogeneous images.Firstly,fuzzification of two IR/VS images has been done by feeding it to the fuzzy sets to remove the uncertainty present in the background and object of interest of the image.Secondly,images have been learned by two parallel branches of the siamese convolutional neural network(CNN)to extract prominent features from the images as well as high-frequency information to produce focus maps containing source image information.Finally,the obtained focused maps which contained the detailed integrated information are directly mapped with the source image via pixelwise strategy to result in fused image.Different parameters have been used to evaluate the performance of the proposed image fusion by achieving 1.008 for mutual information(MI),0.841 for entropy(EG),0.655 for edge information(EI),0.652 for human perception(HP),and 0.980 for image structural similarity(ISS).Experimental results have shown that the proposed technique has attained the best qualitative and quantitative results using 78 publically available images in comparison to the existing discrete cosine transform(DCT),anisotropic diffusion&karhunen-loeve(ADKL),guided filter(GF),random walk(RW),principal component analysis(PCA),and convolutional neural network(CNN)methods.

关键词： Convolutional neural network fuzzy sets infrared and visible image fusion deep learning

Biological Parts for Engineering Abiotic Stress Tolerance in Plants

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BioDesign Research 2022年第1期2022卷 395-435页

作者： Neeta Lohani Mohan B.Singh Prem L.bhalla Plant Molecular Biology and Biotechnology Laboratory Faculty of Veterinary and Agricultural SciencesThe University of MelbourneParkvilleVIC 3010Australia

It is vital to ramp up crop production dramatically by 2050 due to the increasing global population and demand for food.However, with the climate change projections showing that droughts and heatwaves becoming common in much of the globe,there is a severe threat of a sharp decline in crop yields. Thus, developing crop varieties with inbuilt genetic tolerance toenvironmental stresses is urgently needed. Selective breeding based on genetic diversity is not keeping up with the growingdemand for food and feed. However, the emergence of contemporary plant genetic engineering, genome-editing, and syntheticbiology offer precise tools for developing crops that can sustain productivity under stress conditions. Here, we summarize thesystems biology-level understanding of regulatory pathways involved in perception, signalling, and protective processesactivated in response to unfavourable environmental conditions. The potential role of noncoding RNAs in the regulation ofabiotic stress responses has also been highlighted. Further, examples of imparting abiotic stress tolerance by geneticengineering are discussed. Additionally, we provide perspectives on the rational design of abiotic stress tolerance throughsynthetic biology and list various bioparts that can be used to design synthetic gene circuits whose stress-protective functionscan be switched on/off in response to environmental cues.

关键词： protective crops precise

Myositis and rhabdomyolysis in scrub typhus infection: 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

Asian Pacific Journal of Tropical Medicine 2023年第4期16卷 187-189页

作者： Tukaram Bolla Sushmita Bhattarai Harpreet Singh Vikas Suri Ashish bhalla Debajyoti Chatterjee Department of Internal Medicine Post Graduate Institute of Medical Education and ResearchChandigarh160012India Department of Histopathology Post Graduate Institute of Medical Education and ResearchChandigarh160012India

Rationale:Fever with myositis and rhabdomyolysis is a medical emergency requiring prompt diagnosis and management.Scrub typhus associated myositis with rhabdomyolysis is rare.Patient concerns:A 36-year-old female presented with intermittent fever up to 38.6℃,jaundice and progressive weakness of all four limbs.Diagnosis:Scrub typhus associated myositis and rhabdomyolysis.Intervention:Doxycycline 100 mg twice daily and injection of ceftriaxone 1 gm twice daily along with continuous intravenous fluids.Outcome:Fever resolved with normalization of liver function and recovery of muscle power.Lessons:Presence of myositis and rhabdomyolysis is uncommon in scrub typhus;high clinical suspicion should be kept in patients with atypical manifestations of scrub typhus.

关键词： Scrub typhus Myositis Rhabdomyolysis Doxycycline Transaminitis Vasculitis

Heavy metal induced DNA changes in aquatic macrophytes: Random amplified polymorphic DNA analysis and identification of sequence characterized amplified region marker

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 Environmental Sciences 2009年第5期21卷 686-690页

作者： Meetu Gupta Neera bhalla Sarin Department of Biosciences Jamia Millia Islamia New Delhi-110025 India School of Life Sciences Jawaharlal Nehru University

Plants have been used as good bio-indicators and genetic toxicity of environmental pollution in recent years. In this study, aquatic plants Hydrilla verticillata and Ceratophyllum demersum treated with 10umol/L Cd, 5 umol/L Hg, and 20 umol/L Cu for 96 h, showed changes in chlorophyll, protein content, and in DNA profiles. The changes in DNA profiles included variation in band intensity, presence or absence of certain bands and even appearance of new bands. Genomic template stability test performed for the qualitative measurement of changes in randomly amplified polymorphic DNA （RAPD） profiles, showed significant effect at the given concentration of metals. Cloning and sequencing of bands suggested that these markers although may not be homologous to any known gene but its conversion as a sequence characterized amplified region （SCAR） marker is useful in detecting the effects of genotoxin agents.

关键词： RAPD Hydrilla verticillata Ceratophyllum demersum DNA polymorphism, SCAR marker

Bacille-Calmette-Guerin modulates human macrophage and dendritic cell response to SARS-CoV-2 S-glycoprotein

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

Infectious Medicine

Infectious Medicine 2023年第3期2卷 241-245页

作者： Regina C.Ambe Shubhang bhalla Alejandra Alvarado Jose Barragan Jorge Cervantes Paul L.Foster School of Medicine Texas Tech University Health Sciences CenterEl PasoTX 79905USA Dr Kiran C.Patel College of Allopathic Medicine Nova Southeastern UniversityFort LauderdaleFL 33328USA

Background:Given that epidemiological evidence suggests a potential protective role for Bacille-Calmette-Guerin against COVID-19,we aimed to explore whether pre-exposure of human monocyte-derived macrophages and dendritic cells to BCG could modulate their response to SARS-CoV-2 S-glycoprotein.Methods:Dual THP-1 cells containing 2 reporter plasmids for transcription factors NF-κB,and IRF were differ-entiated into macrophages over 3 days using phorbol 12-myristate 13-acetate,or into dendritic cells over 6 days using commercial monocyte-dencritic cell differentiation media and matured with recombinant tumor necrosis factor-α.Cells were exposed to BCG for 24 h and then stimulated with SARS-CoV-2 S-glycoprotein for 24 hours.Results:Pre-exposure of human macrophages and DCs to BCG increased IRF and NF-kb activation in response to the SARS-CoV-2 S-glycoprotein.Conclusions:Our results showed that pre-exposure of both types of cells to BCG exhibited an increase in inflam-matory transcription factors upon stimulation with S-glycoprotein.BCG-induced trained immunity may be an important tool for reducing susceptibility to SARS-CoV-2 infection and severity of COVID-19.Our findings help in the design of future BCG-based therapeutic approaches in the treatment of diseases caused by viral infections.

关键词： BCG SARS-CoV-2 Dendritic cell Macrophage

Growth and dielectric properties of Ta2O5 single crystals grown by laser heated pedestal growth technique

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国激光 2008年第11期35卷 1710-1712页

作者：蒋毅坚 Ruyan Guo A. S. bhalla Institute of Laser Engineering Beijing University of Technology Beijing 100124 Materials Research Laboratory The Pennsylvania State University University Park PA 16802 USA

Ta2O5 single crystals have been grown by the laser heated pedestal growth (LHPG) technique up to several centimeters length with diameter of 1.1 mm. The crystal, characterized by X-ray diffraction, dielectric measurement, and thermal expansion analysis, has Htri-Ta2O5 symmetry. Dielectric permittivity, loss tangent along [001] and [110] direction were investigated over the temperature range from -80 ℃ to 100 ℃. Large dielectric anisotropy in Ta2O5 single crystal was observed. At room temperature, the dielectric permittivities (1 MHz) along [001] and [110] are 33.2 and 231.9, respectively. The reason of dielectric enhancement in Ta2O5 crystal grown by LHPG was also discussed.

关键词：电介质单晶激光器生长技术

Mobile stroke care expedites intravenous thrombolysis and endovascular thrombectomy

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

Stroke & Vascular Neurology 2022年第3期7卷 209-214页

作者： Matthew T Bender Thomas K Mattingly Redi Rahmani Diana Proper Walter A Burnett Jason L Burgett Joshua LEsperance Jeremy T Cushman Webster H Pilcher Curtis G Benesch Adam G Kelly Tarun bhalla Department of Neurosurgery University of Rochester Medical CenterRochesterNew YorkUSA Department of Emergency Medicine University of Rochester Medical CenterRochesterNew YorkUSA Department of Neurology University of Rochester Medical CenterRochesterNew YorkUSA

Background The number of mobile stroke programmes has increased with evidence,showing they expedite intravenous thrombolysis.Outstanding questions include whether time savings extend to patients eligible for endovascular therapy and impact clinical outcomes.Objective Our mobile stroke unit(MSU),based at an academic medical centre in upstate New York,launched in October 2018.We reviewed prospective observational data sets over 26 months to identify MSU and non-MSU emergency medical service(EMS)patients who underwent intravenous thrombolysis or endovascular thrombectomy for comparison of angiographic and clinical outcomes.Results Over 568 days in service,the MSU was dispatched 1489 times(2.6/day)and transported 300 patients(20%of dispatches).Intravenous tissue plasminogen activator(tPA)was administered to 57 MSU patients and the average time from 911 call-to tPA was 42.5 min(±9.2),while EMS transported 73 patients who received tPA at 99.4 min(±35.7)(p<0.001).Seven MSU patients(12%)received tPA from 3.5 hours to 4.5 hours since last known well and would likely have been outside the window with EMS care.Endovascular thrombectomy was performed on 21 MSU patients with an average 911 call-to groin puncture time of 99.9 min(±18.1),while EMS transported 54 patients who underwent endovascular thrombectomy(ET)at 133.0 min(±37.0)(p=0.0002).There was no difference between MSU and traditional EMS in modified Rankin score at 90-day clinic follow-up for patients undergoing intravenous thrombolysis or endovascular thrombectomy,whether assessed as a dichotomous or ordinal variable.Conclusions Mobile stroke care expedited both intravenous thrombolysis and endovascular thrombectomy.There is an ongoing need to show improved functional outcomes with MSU care.

关键词： intravenous throm endovascular