检索结果-南通市图书馆

Magnesium based implants for functional bone tissue regeneration–A review

Journal of Magnesium and Alloys 2022年第2期10卷 384-419页

作者： Gavish Uppal amit Thakur amit Chauhan Saroj Bala University Institute of Engineering and Technology Panjab Universitysector-14ChandigarhIndia Sri Guru Gobind singh College Panjab Universitysector-26ChandigarhIndia

Magnesium(Mg)has emerged as one of the third-generation biomaterials for regeneration and support of functional bone *** is a better choice over permanent implants such as titanium,stainless steel,cobalt-chrome as magnesium is biodegradable and does not require a second surgery for its removal after bone tissue *** also reduces the risk of stress shielding as its elastic modulus is closer to human bone in comparison to permanent implants and other biodegradable metallic implants based on Iron and *** importantly,Mg is osteoconductive thus stimulates new bone formation and possess anti-bacterial properties hence reducing the risk of failure due to *** its advantages,a major concern with pure Mg is its rapid bio-corrosion in presence of body fluids due to which the mechanical integrity of the implant deteriorates before healing of the tissue is *** properties of Mg-based implants can be enhanced by mechanical processing,alloying,and topology *** reduce the corrosion/degradation rate,Mg has been alloyed with metals,reinforced with ceramics,and surface coatings have been applied so that the degradation rate of Mg-based implant matches with that of healing rate of bone *** present review discusses the effect of alloying elements and reinforcing ceramics on microstructure,mechanical,and corrosion properties of Mg-based orthopedic *** addition,the biocompatibility of Mg-based alloys,composites,and coatings applied on Mg implants has been ***,different methods of fabricating porous implants have been highlighted as making the implant porous facilitates the growth of new bone tissue through the pores.

关键词： Magnesium Biodegradable orthopedic implant Porous structure Osteo-conductive Antibacterial

来源：

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

Microstructure, mechanical properties and two-body abrasive wear behaviour of hypereutectic Al-Si-SiC composite

引用

Transactions of Nonferrous Metals Society of China 2020年第1期30卷 65-75页

作者： Raj Kumar singh amit TELANG Satyabrata DAS Department of Mechanical Engineering Maulana Azad National Institute of TechnologyLink Road Number 3Bhopal 462003India Advanced Materials and Processes Research Institute(AMPRI) Near Habibganj NakaBhopal 462026India

The microstructure,mechanical properties,and the effects of sliding distance and material removal mechanism on two-body abrasive wear behaviour of hypereutectic Al-Si-Si C composite and its matrix alloy were *** hypereutectic Al-Si-Si C composite was prepared by stir casting *** hardness,ultimate tensile strength and yield strength of the composite are increased by 17%,38%,and 30%respectively compared with those of the matrix alloy,while the elongation of the composite is decreased by 48%compared with that of the matrix *** wear rate of the materials is increased with increasing the abrasive size and the applied load and does not vary with the sliding *** wear surfaces and wear debris of the materials were characterized by high-resolution field emission scanning electron microscopy(HR FESEM)and wear mechanism was analyzed for low and high load regimes.

关键词： metal matrix composite fracture surface debris analysis two-body abrasive wear

来源：

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

Randomized controlled trial of topical EMLA and vapocoolant spray for reducing pain during wDPT vaccination

引用

World Journal of Pediatrics 2017年第3期13卷 236-241页

作者： Navratan Kumar Gupta amit Upadhyay Ajeet Kumar Dwivedi Astha Agarwal Vijay Jaiswal Abhishek singh Department of Pediatrics LLRMMedical CollegeMeerut(UP)India

Background:Intramuscular vaccination is among the most common source of iatrogenic pain in *** sprays are rapid-acting alternative to topical *** provide transient anesthesia via evaporation induced skin cooling,and reduce pain due to vaccine injection in children and *** objective was to compare the synergistic analgesic effect of eutectic mixture of local anesthetics (EMLA) with breastfeeding (EB group) and vapocoolant spay with breastfeeding (VB group) to that of only breastfeeding (BO group) during whole cell diptheria,pertussis and tetanus (wDPT) ***:A double blind randomized controlled trial was done to include infants up to 3 months of age who came for their first wDPT *** primary outcome variable was the duration of cry after *** outcome variables were Modified Facial Coding Score,Neonatal Infant Pain Scale and latency of onset of ***:Of the 201 eligible participants,111 babies were excluded and remaining 90 babies were randomized into three groups of thirty *** groups did not differ significantly in baseline *** (interquartile range,IQR) of duration of cry was lesser [35.86 (21.07-107.75) seconds] in babies receiving EMLA cream with breast feeding (EB group) and in babies receiving vapocoolant spray with breast feeding (VB group) [32.58 (21.25-106.21) seconds] as compared to babies receiving only breast feeding (BO group) [67.5 (27.6-180) seconds] (P=-0.147).Difference in median (IQR) of latency of cry was not statistically *** Facial Coding Score and Neonatal Infant Pain Scale at 1 minute and 3 minutes was significantly lower in the EB and VB group,as compared to the BO group (P<0.05).Conclusions:Addition of topical EMLA application or vapocoolant spray to breastfeeding during wDPT vaccination does not reduce duration of cry in infants up to 3 months of ***,they are able to show reduction in pain score and further studi

关键词： diptheria,pertussis and tetanus vaccine eutectic mixture of local anesthetics Modified Facial Coding Score Neonatal Infant Pain Scale

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hypoperfusion context as a predictor of 28-d all-cause mortality in septic shock patients:A comparative observational study

引用

World Journal of Clinical Cases 2023年第16期11卷 3765-3779页

作者： Sahil Kataria Omender singh Deven Juneja amit Goel Madhura Bhide Devraj Yadav Institute of Critical Care Medicine Max Super Speciality HospitalSaketNew Delhi 110017India

BACKGROUND As per the latest Surviving Sepsis Campaign guidelines,fluid resuscitation should be guided by repeated measurements of blood lactate levels until ***,raised lactate levels should be interpreted in the clinical context,as there may be other causes of elevated lactate ***,it may not be the best tool for real-time assessment of the effect of hemodynamic resuscitation,and exploring alternative resuscitation targets should be an essential research priority in *** To compare the 28-d mortality in two clinical patterns of septic shock:hyperlactatemic patients with hypoperfusion context and hyperlactatemic patients without hypoperfusion *** This prospective comparative observational study carried out on 135 adult patients with septic shock that met Sepsis-3 definitions compared patients with hyperlactatemia in a hypoperfusion context(Group 1,n=95)and patients with hyperlactatemia in a non-hypoperfusion context(Group 2,n=40).Hypoperfusion context was defined by a central venous saturation less than 70%,central venousarterial PCO_(2)gradient[P(cv-a)CO_(2)]≥6 mmHg,and capillary refilling time(CRT)≥4 *** patients were observed for various macro and micro hemodynamic parameters at regular intervals of 0 h,3 h,and 6 ***-cause 28-d mortality and all other secondary objective parameters were observed at specified *** categorical data were compared using theχ^(2)or Fisher’s exact *** distributed continuous variables were compared using the Mann-Whitney U *** operating characteristic curve analysis with the Youden index determined the cutoff values of lactate,CRT,and metabolic perfusion parameters to predict the 28-d all-cause mortality.A P value of<0.05 was considered *** Patient demographics,comorbidities,baseline laboratory,vital parameters,source of infection,baseline lactate levels,and lactate clearance at 3 h and 6 h,Sequential Organ Failure scores,need for inv

关键词： Capillary refill time Central venous saturation Hypoperfusion Lactate Mortality PCO_(2)gap Septic shock

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optimization of Cognitive Radio System Using Self-Learning Salp Swarm Algorithm

引用

Computers, Materials & Continua 2022年第2期70卷 3821-3835页

作者： Nitin Mittal Harbinder singh Vikas Mittal Shubham Mahajan amit Kant Pandit Mehedi Masud Mohammed Baz Mohamed Abouhawwash Department of Electronics&Communication Engineering Chandigarh UniversityMohali140413India School of VLSI Design and Embedded Systems National Institute of TechnologyKurukshetra136119India School of Electronics&Communication Engineering Shri Mata Vaishno Devi UniversityKatra182320India Department of Computer Science College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia Department of Computer Engineering College of Computer and Information TechnologyTaif UniversityTaif21994Saudi Arabia Department of Mathematics Faculty of ScienceMansoura UniversityMansoura35516Egypt Department of Computational Mathematics Scienceand Engineering(CMSE)Michigan State UniversityEast LansingMI48824USA

CognitiveRadio(CR)has been developed as an enabling technology that allows the unused or underused spectrum to be used dynamically to increase spectral *** improve the overall performance of the CR systemit is extremely important to adapt or reconfigure the *** Decision Engine is a major module in the CR-based system that not only includes radio monitoring and cognition functions but also responsible for parameter *** meta-heuristic algorithms offer numerous advantages compared to traditional mathematical approaches,the performance of these algorithms is investigated in order to design an efficient CR system that is able to adapt the transmitting parameters to effectively reduce power consumption,bit error rate and adjacent interference of the channel,while maximized secondary user ***-Learning Salp Swarm Algorithm(SLSSA)is a recent meta-heuristic algorithm that is the enhanced version of SSA inspired by the swarming behavior of *** this work,the parametric adaption of CR system is performed by SLSSA and the simulation results show that SLSSA has high accuracy,stability and outperforms other competitive algorithms formaximizing the throughput of secondary *** results obtained with SLSSA are also shown to be extremely satisfactory and need fewer iterations to converge compared to the competitive methods.

关键词： Cognitive radio meta-heuristic algorithm cognitive decision engine salp swarm algorithm

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Gastric conduit perforation

引用

World Journal of Clinical Cases 2014年第8期2卷 398-401页

作者： Nilesh Patil Arvind Kaushal amit Jain Sundeep singh Saluja Pramod Kumar Mishra Department of Gastrointestinal Surgery Academic BlockGB Pant Hospital and Maulana Azad Medical CollegeNew Delhi 110002India

As patients with carcinoma of the esophagus live longer, complications associated with the use of a gastric conduit are increasing. Ulcers form in the gastric conduit in 6.6% to 19.4% of patients. There are a few reports of perforation of a gastric conduit in the English literature. Almost all of these were associated with serious complications. We report a patient who developed a tension pneumothorax consequent to spontaneous perforation of an ulcer in the gastric conduit 7 years after the index surgery in a patient with carcinoma of the gastroesophageal junction. He responded well to conservative management. Complications related to a gastric conduit can be because of multiple factors. Periodic endoscopic surveillance of gastric conduits should be considered as these are at a higher risk of ulcer formation than a normal stomach. Long term treatment with proton pump inhibitors may decrease complications. There are no guidelines for the treatment of a perforated gastric conduit ulcer and the management should be individualized.

关键词： Gastric conduit Ulcer formation Perforation Carcinoma of the esophagus Proton pump inhibitors

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computational interaction analysis of organophosphorus pesticides with different metabolic proteins in humans

引用

The Journal of Biomedical Research 2011年第5期25卷 335-347页

作者： amit Kumar Sharma Karuna Gaur Rajeev Kumar Tiwari Mulayam singh Gaur Pesticides Research & Sensors Laboratory Department of PhysicsHindustan College of Science and Technology Department of Bioscience R.D.Govt.Girls College

Pesticides have the potential to leave harmful effects on humans, animals, other living organisms, and the environment. Several human metabolic proteins inhibited after exposure to organophosphorus pesticides absorbed through the skin, inhalation, eyes and oral mucosa, are most important targets for this interaction study. The crystal structure of five different proteins, PDBIDs： 3LII, 3NXU, 4GTU, 2XJ1 and 1YXA in Homo sapiens （H. sapiens）, interact with organophosphorus pesticides at the molecular level. The 3-D structures were found to be of good quality and validated through PROCHECK, ERRAT and ProSA servers. The results show that the binding energy is maximum -45.21 relative units of cytochrome P450 protein with phosmet pesticide. In terms of H-bonding, methyl parathion and parathion with acetylcholinesterase protein, parathion, methylparathion and phosmet with protein kinase C show the highest interaction. We conclude that these organophosphorus pesticides are more toxic and inhibit enzymatic activity by interrupting the metabolic pathways in H. sapiens.

关键词： docking organophosphorus pesticides comparative analysis modeling toxicity analysis acetylcholinesterases Homo sapiens

来源：

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

Adaptive Cell Segmentation and Tracking for Volumetric Confocal Microscopy Images of a Developing Plant Meristem

引用

Molecular Plant 2011年第5期4卷 922-931页

作者： Min Liu Anirban Chakrabortyt Damanpreet singh Ram Kishor Yadav Gopi Meenakshisundaram G. Venugopala Reddy amit Roy-Chowdhury Department of Electrical Engineering University of California Riverside CA USA Department of Computer Science University of California Irvine CA USA Department of Botany and Plant Sciences and Center for Plant Cell Biology University of California Riverside CA USA

Automated segmentation and tracking of cells in actively developing tissues can provide high-throughput and quantitative spatiotemporal measurements of a range of cell behaviors; cell expansion and cell-division kinetics leading to a better understanding of the underlying dynamics of morphogenesis. Here, we have studied the problem of constructing cell lineages in time-lapse volumetric image stacks obtained using Confocal Laser Scanning Microscopy （CLSM）. The novel contribution of the work lies in its ability to segment and track cells in densely packed tissue, the shoot apical meristem （SAM）, through the use of a close-loop, adaptive segmentation, and tracking approach. The tracking output acts as an indicator of the quality of segmentation and, in turn, the segmentation can be improved to obtain better tracking results. We construct an optimization function that minimizes the segmentation error, which is, in turn, estimated from the tracking results. This adaptive approach significantly improves both tracking and segmentation when compared to an open loop framework in which segmentation and tracking modules operate separately.

关键词： Shoot apical meristem stem cells cell tracking cell segmentation integrated segmentation and tracking

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Management of hypersplenism in non-cirrhotic portal hypertension:a surgical series

引用

Hepatobiliary & Pancreatic Diseases International 2012年第2期11卷 165-171页

作者： Rajesh Rajalingam amit Javed Dharmanjay Sharma Puja Sakhuja Shivendra singh Hirdaya H Nag Anil K Agarwal Department of Gastrointestinal Surgery G. B. Pant Hospital and Maulana Azad Medical College Delhi University New Delhi India Department of Pathology G. B. Pant Hospital and Maulana Azad Medical College Delhi University New Delhi India

BACKGROUND:Hypersplenism is commonly seen in patients with non-cirrhotic portal hypertension(NCPH).While a splenectomy alone can effectively relieve the hypersplenism,it does not address the underlying portal *** present study was undertaken to analyze the impact of shunt and non-shunt operations on the resolution of hypersplenism in patients with *** relationship of symptomatic hypersplenism,severe hypersplenism and number of peripheral cell line defects to the severity of portal hypertension and outcome was also ***:A retrospective analysis of NCPH patients with hypersplenism managed surgically between 1999 and 2009 at our center was *** 252 patients with NCPH,64(45 with extrahepatic portal vein obstruction and 19 with non-cirrhotic portal fibrosis) had hypersplenism and constituted the study *** analysis was done using GraphPad *** and continuous variables were compared using the chi-square test,ANOVA,and Student’s t *** MannWhitney U test and Kruskal-Wallis test were used to compare non-parametric ***:The mean age of patients in the study group was 21.81±6.1 *** was symptomatic in 70.3% with an incidence of spontaneous bleeding at 26.5%,recurrent anemia at 34.4%,and recurrent infection at 29.7%.The mean duration of surgery was 4.16±1.9 hours,intraoperative blood loss was 457±126(50-2000) mL,and postoperative hospital stay 5.5±1.9 *** surgery,normalization of hypersplenism occurred in all *** long-term followup,none of the patients developed hepatic encephalopathy and 4 had a variceal re-bleeding(2 after a splenectomy alone,1 each after an esophago-gastric devascularization and proximal splenorenal shunt).Patients with severe hypersplenism and those with defects in all three peripheral blood cell lineages were older,had a longer duration of symptoms,and a higher incidence of variceal bleeding and postoperative *** addition,patients with t

关键词： portal hypertension hypersplenism splenorenal shunt lienorenal shunt

来源：

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

Dust-Holding Capacity and Bio-Chemical Changes of Plant Species Growing in an Around Opencast Mining Area of Bundelkhand Region of Uttar Pradesh, India

引用

American Journal of Plant Sciences 2024年第8期15卷 677-698页

作者： Priyanka singh amit Pal Institute of Environment and Development Studies Bundelkhand University Jhansi India

The present study has been carried out on a total of 50 available plant species to assess their dust-capturing capacity and biochemical performances in and around open cast granite mine areas of Jhansi district and Bundelkhand University campus treated as control site. Plant species existing under a polluted environment for a long time may be considered as potentially resistant species and recommended for green belt design in mining areas, especially to cope with dust pollution. Results showed the pollution level, especially of mining-originated dust particles holding capacity of leaves and effects of different biochemical parameters (Total Chlorophyll, Protein and Carotenoid) of existing plant species both from mining areas as well as from Bundelkhand University campus. Based on their performances, Tectona grandis L., Ficus hispida L., Calotropis procera Aiton., Butea monosperma Lam. and Ficus benghalensis L., etc. are highly tolerant species while Ficus infectoria L., Artocarpus heterophyllus Lam., Ipomoea purpurea L., Allianthus excelsa Roxb. and Bauhinia variegata L. are intermediate tolerant species. T. grandis had shown the highest dust-holding capacity (2.566 ± 0.0004 mg/cm2) whereas Albizia procera (0.018 ± 0.0002 mg/cm2) was found to be the lowest dust-holding capacity. Our findings also showed that the T. grandis and F. hispida have significant dust deposition with minimal effect of dust on their leaf chlorophyll (17.447 ± 0.019 mg/g and 14.703 ± 0.201 mg/g), protein (0.699 ± 0.001 mg/g and 0.604 ± 0.002 mg/g) and carotenoid (0.372 ± 0.003 mg/g and 0.354 ± 0.003 mg/g) content respectively among all selected plant species. Therefore, in the present investigation, plant species with high tolerance to high dust-holding capacity on their leaf surfaces are preferable for green corridors as open cast granite mines and their adjacent areas.

关键词： Bundelkhand Region Biochemical Changes Dust-Holding Capacity Chlorophyll Content Open Cast Granite Mining

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：