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    题名 作者 年代 出处 被引量
1黔西南Au-As-Hg-Tl矿化区毒害金属元素的水地球化学显示文摘研究了黔西南典型 Au-As-Hg-Tl矿化区内毒害金属元素在采矿活动和自然状态影响下的水地球化学特征及其环境效应。结果表明,已开采的 Hg-Tl矿区地下水和地表水中均有很高的毒害金属元素,煤采区地下水中亦表现出类似的特征,而 Hg-Tl矿区外围地下水中金属元素保持在较低的水平。 Hg-Tl矿区地表水中 As和 Tl的分布模式表明,其含量的变化受矿区地下水排泄和尾矿淋滤作用的控制。在尚未开采的金矿区,浅层地下水中金属元素的含量没有明显的富集,尚未构成环境问题。采矿活动扰动下的地下水和暴露于地表的尾矿及矿山废物是水中毒害金属元素的主要来源,水环境研究对采矿活动造成的环境影响具有良好的指示效果。肖唐付 洪业汤 郑宝山 洪冰 Dan Boyle Jayanta Guha 2000地球化学2000,29,6:28
2Endoscopic incisional therapy for benign esophageal strictures: Technique and results显示文摘Benign esophageal strictures refractory to the conventional balloon or bougie dilatation may be subjected to various adjunctive modes of therapy, one of them being endoscopic incisional therapy(EIT). A proper delineation of the stricture anatomy is a prerequisite. A host of electrocautery and mechanical devices may be used, the most common being the use of needle knife, either standard or insulated tip. The technique entails radial incision and cutting off of the stenotic rim. Adjunctive therapies, to prevent re-stenosis, such as balloon dilatation, oral or intralesional steroids or argon plasma coagulation can be used. The common strictures where EIT has been successfully used are Schatzki's rings(SR) and anastomotic strictures(AS). Short segment strictures(< 1 cm) have been found to have the best outcome. When compared with routine balloon dilatation, EIT has equivalent results in treatment na?ve cases but better long term outcome in refractory cases. Anecdotal reports of its use in other types of strictures have been noted. Post procedure complications of EIT are mild and comparable to dilatation therapy. As of the current evidence, incisional therapy can be used for management of refractory AS and SR with relatively short stenosis(< 1 cm) with good safety profile and acceptable long term patency.Jayanta Samanta Narendra Dhaka Saroj Kant Sinha Rakesh Kochhar 2015World Journal of Gastrointestinal Endoscopy2015,7,19:14
3Pancreatic fluid collections: What is the ideal imaging technique?显示文摘Pancreatic fluid collections(PFCs) are seen in up to 50% of cases of acute pancreatitis. The Revised Atlanta classification categorized these collections on the basis of duration of disease and contents, whether liquid alone or a mixture of fluid and necrotic debris. Management of these different types of collections differs because of the variable quantity of debris; while patients with pseudocysts can be drained by straight-forward stent placement, walledoff necrosis requires multi-disciplinary approach. Differentiating these collections on the basis of clinical severity alone is not reliable, so imaging is primarily performed. Contrast-enhanced computed tomography is the commonly used modality for the diagnosis and assessment of proportion of solid contents in PFCs; however with certain limitations such as use of iodinated contrast material especially in renal failure patients and radiation exposure. Magnetic resonance imaging(MRI) performs better than computed tomography(CT) in characterization of pancreatic/peripancreatic fluid collections especially for quantification of solid debris and fat necrosis(seen as fat density globules), and is an alternative in those situations where CT is contraindicated. Also magnetic resonance cholangiopancreatography is highly sensitive for detecting pancreatic duct disruption and choledocholithiasis. Endoscopic ultrasound is an evolving technique with higher reproducibility for fluid-to-debris component estimation with the added advantage of being a single stage procedure for both diagnosis(solid debris delineation) and management(drainage of collection) in the same sitting. Recently role of diffusion weighted MRI and positron emission tomography/CT with ^(18)F-FDG labeled autologous leukocytes is also emerging for detection of infection noninvasively. Comparative studies between these imaging modalities are still limited. However we look forward to a time when this gap in literature will be fulfilled.Narendra Dhaka Jayanta Samanta Suman Kochhar Navin Kalra Sreekanth Appasani Manish Manrai Rakesh Kochhar 2015World Journal of Gastroenterology2015,21,48:13
4Characterization of biofilms in biliary stents and potential factors involved in occlusion显示文摘AIM To quantify the components in biofilms and analyze the predisposing factors involved in occlusion of biliary stents. METHODS In a prospective study conducted from April 2011 to March 2014 at a tertiary care hospital, all consecutive patients who required endoscopic biliary stent exchange/removal were included. Etiology of the biliary disease was diagnosed by imaging, cytology and on follow-up. Clinical details of patients with biliary stent retrieval were noted. All extracted stents were collected in sterile containers and immediatelyprocessed for quantification of biofilm proteins and polysaccharides. Molecular identification of commonly known and unknown bacteria was performed by polymerase chain reaction and density gradient gel electrophoresis methods. RESULTS Eighty one patients(41 males) with age range of 20-86 years were studied. The underlying causes for stent insertion were bile duct stones(n = 46; 56.8%) benign stricture(n = 29; 35.8%) and malignancy(n = 6; 7.4%) with cholangitis in 50(61.7%) patients. The retrieved stent sizes were 7 Fr(n = 62; 76.5%) and 10 Fr(n = 19; 23.5%) with 65 days median insertion duration. Polybacterial consortia were detected in 90.1% of the stents. The most common bacteria identified by polymerase chain reaction alone and/or sequencing were Pseudomonas(n = 38), Citrobacter(n = 23), Klebsiella(n = 22), Staphylococcus(n = 20), Serratia(n = 16), Escherichia coli(n = 14), Streptococcus(n = 13), Enterococcus(n = 13), Aeromonas(n = 12), Proteus(n = 10) and Enterobacter(n = 9). Protein concentration according to gender(0.547 ± 0.242 mg/ml vs 0.458 ± 0.259 mg/ml; P = 0.115) as well as age > 60 years and < 60 years(0.468 ± 0.295 mg/ml vs 0.386 ± 0.238 mg/ml; P = 0.205) was non-significant. However, polysaccharide concentration was significant both according to gender(0.052 ± 0.021 mg/ml vs 0.049 ± 0.016 mg/ml; P < 0.0001) and age(0.051 ± 0.026 mg/ml vs 0.038 ± 0.016 mg/ml; P < 0.011). Protein concentration in the biofilm was significantly higher(0.555 ± 0.225 mg/ml vs 0.419 ± 0.276 mg/ml; P = 0.018) in patients with cholangitis, lower(0.356 ± 0.252 mg/ml vs 0.541 ± 0.238 mg/ml; P = 0.005) in the 10 Fr group than the 7 Fr group, and significantly higher(0.609 ± 0.240 mg/ml vs 0.476 ± 0.251 mg/ml; P = 0.060) in stents of ≥ 6 mo of indwelling time. However presence/absence of cholangitis, size of stent, indication of stent insertion and indwelling time did not affect the quantity of polysaccharide concentration.CONCLUSION Plastic stents retrieved from patients with biliary tract disease showed polymicrobial organisms with higher protein content among patients with cholangitis and those with smaller diameter stents. longer indwelling duration had more biofilm formation.Chetana Vaishnavi Jayanta Samanta Rakesh Kochhar 2018World Journal of Gastroenterology2018,24,1:8
5加拿大Abitibi绿岩带Donalda金矿近水平含金石英脉的显微构造分析及其对成矿流体动力学的指示显示文摘位于加拿大Abitibi绿岩带南部的Donalda金矿床主要由近水平的、与剪切带近垂直的含金石英脉组成,矿脉厚度0.3~0.5m,含大量与脉壁平行的条带,指示多期次裂隙扩张和矿物沉淀。原生石英c-轴方位测量显示石英生长方向垂直于脉壁,指示断裂属张性,矿物沉淀属空间充填。显微裂隙、细脉及流体包裹体面(FIPs)的方位测量指示原生矿物受到了近直立的最大主压应力(σ1)作用,与区域性的、近水平的南北向挤压应力不符。这一矛盾现象可用流体压力在超静岩和静水压力之间周期性变化及近水平断裂的周期性张开与闭合来解释。当流体压力大于静岩压力时,断裂张开,原生矿物沉淀,而当流体压力减小时,断裂上盘往下垮,两盘突出的矿物碰撞、碾压形成与脉壁平行的变形条带。由于断裂两盘岩石不是沿整条断裂都互相接触,两盘相顶部分承受的垂直应力大于水平方向的挤压应力,这就解释了为什么显微构造指示近直立的最大主压应力(σ1)。这个流体-构造模式支持断层阀模式,并且无须改变区域应力场就可解释脉体内局部主压应力的变化。池国祥 Jayanta Guha 2011地学前缘2011,18,5:6
6Phytochemical Profiling and Bioactivity of A Mangrove Plant,Sonneratia apetala,from Odisha Coast of India显示文摘与 Sonneratia apetala Buch 火腿的 phytochemicals 一起测试抗氧化剂, antidiabetic, anticancer 和抗菌剂活动。Jayanta Kumar Patra Swagat Kumar Das Hrudayanath Thatoi 2015Chinese Journal of Integrative Medicine2015,21,4:5
7Multi-item EPQ model with learning effect on imperfect production over fuzzy-random planning horizon显示文摘Uncertainty is certain in the world of uncertainty.This study revisits an economic production quantity(EPQ)model with shortages for stock-dependent demand of the items with reworking and disposing of the imperfect ones over a random planning horizon under the joint effect of inflation and time value of money,where the expected time length is imprecise in nature.Transmission of learning effect has been incorporated to reduce the defective production.The total expected profit over the random planning horizon is maximized subject to the imprecise space constraint.The possibility,necessity and credibility measures have been introduced to defuzzify the model.The simulation-based genetic algorithm is used to make decision for the above EPQ model in different measures of uncertainty.The model is illustrated through an example.Sensitivity analysis shows the impacts of different parameters on the objective function in the model.Amalesh Kumar Manna Barun Das Jayanta Kumar Dey Shyamal Kumar Mondal 2017Journal of Management Analytics2017,4,1:5
8Dengue and its effects on liver显示文摘Dengue has emerged as an important arboviral disease with significant impact on the disease burden in population residing in tropical countries. Dengue is spread by the bite of Aedes mosquito. The virus seems to have some hepatotoxic effects. Affliction of liver in form of derangements in the liver function tests is common and may include mild elevations in serum bilirubin, elevated transaminases and derangements in serum albumin. Although asymptomatic in most cases, clinical manifestations like jaundice, and acute liver failure(ALF) may occasionally complicate the clinical picture. Indeed, dengue has been implicated as an important cause of ALF in endemic countries. The present review focuses on the hepatic manifestations and the pathogenesis of the liver injury in dengue.Jayanta Samanta Vishal Sharma 2015World Journal of Clinical Cases2015,3,2:4
9An inventory model under development cost-dependent imperfect production and reliability-dependent demand显示文摘This paper considers a model that deals with an imperfect production process where both perfect and imperfect quality items are produced.Here,demand depends on selling price and reliability of the product.Each manufacturing company expects to produce perfect quality items.But due to the long-run process,several kinds of problem such as labor,machinery,and technology arise.As a result,the manufacturing system becomes out-of-control state and consequently produces both perfect and imperfect quality items.Perfect items are ready to sell but imperfect items are reworked at a cost to become perfect.Reworking cost,reliability of the product and reliability parameter of the manufacturing system can be improved by introducing the development cost and also by improving the quality of the raw material of the production system.Under such circumstances,a profit function has been developed to find the optimum values of reliability parameter of the manufacturing system,reliability of the product and duration of production such that a manufacturer gets a maximum profit.Finally,the model has been illustrated with some numerical examples exploring the sensitivity analysis with respect to some parameters.Barun Khara Jayanta Kumar Dey Shyamal Kumar Mondal 2017Journal of Management Analytics2017,4,3:4
10Larvicidal activity of Dregea volubilis and Bombax malabaricum leaf extracts against the filarial vector Culex quinquefasciatus显示文摘Objective:To analyze the larvicidal activity of two plant leaf powder and leaf-extracts, Dregea volubilis and Bombax malabaricum against Culex quinquefasciatus.Methods:The larvicidal bioassay was done for powdered leaves of Dregea volubilis and Bombax malabaricum individually and their methanol extracts against first-,second-,third- and fourth-instar larval forms of Culex quinquefasciatus.Mortality rate was recorded after 24,48 and 72 h of postexposure. LC50 and LG90 values were calculated at different time intervals for third instar larvae. Results:All the graded concentration(0.1%,0.2%,0.3%,0.4%,0.5%) of powdered leaves showed significant(P <0.05) larval mortality.The mortality rate was higher in 50 ppm doses of methanolic extracts of both the plants against Culex quinquefaciatus.The corresponding <C50 values were 56.97 ppm and 48.85 ppm,respectively after 24 h of exposure.There is no mortality of non-target organism such as Chironomous circumdatus,Oreochromis niloticus niloticus and Diplonichus annulatum within 72 h of post exposure to 0.1%,0.2%,0.3%crude powdered leaves and methanolic extracts of both the two individual plants under the laboratory condition.The results of preliminary qualitative phytochemical analysis of both the plants revealed the presence of many bioactive principles such as steroids,tannins,flavonoids,triterpenoids,saponins,etc. that may be responsible for their bio-control potentiality.Conclusions:The results have shown potential and eco-friendly use of both plant extracts against larva of Culex quinquefasciatus for the first time.Emdad Hossain Anjali Rawani Goutam Chandra Subhash C.Mandal Jayanta Kumar Gupta 2011Asian Pacific Journal of Tropical Medicine2011,4,6:3
11象牙海岸Issia地区铌钽砂矿的研究(英文)显示文摘在西非的象牙海岸Issia地区分布着许多铌钽矿床,包括原生矿和砂矿。原生矿产在分带很好的伟晶岩中。这个地区发育着许多花岗岩和花岗伟晶岩。伟晶岩可分为:(1)分异不好的伟晶岩,无矿化;(2)含Be伟晶岩,分带较好,见绿柱石;(3)含Be-Nb-Ta的伟晶岩,分带很好,是矿体;(4)Be-Nb-Ta-Li伟晶岩,分带很好,是矿体。除了10多个原生矿外,还有许多砂矿。砂矿有两种类型:一种近原生矿的坡积砂矿,另一种是经河流冲刷搬运后的冲积砂矿。我们选择了Etienne-Meguhe砂矿作为近原生矿的坡积砂矿的代表,Bemadi矿作为河流冲积型的砂矿的代表,对这两种类型的砂矿的风化、搬运、沉积机理进行了比较研究。研究发现不同的搬运距离和搬运模式对铌钽砂矿的主要矿物——铌钽铁矿的化学性质没有什么影响,而其物理形态则发生了变化。坡积型砂矿的铌钽铁矿常与石英、长石等矿物连生,其颗粒大小与原生的Nb-Ta伟晶岩中的铌钽铁矿一致;经河流冲积而形成的砂矿中,铌钽铁矿颗粒变小、轮廓变得圆滑,几乎无连生矿物,但矿体集中,常在河流的冲积扇中分布,易开采。Benjamin A ALLOU Huanzhang LU Jayanta GUHA Jacques CARIGNAN 2008大地构造与成矿学2008,32,2:3
12Autophagy and Tumorigenesis显示文摘Srirupa Roy Jayanta Debnath 2010Seminars in Immunopathology2010,,4:3
13Microstructural analysis of a subhorizontal gold-quartz vein deposit at Donalda,Abitibi greenstone belt,Canada:Implications for hydrodynamic regime and fluid-structural relationship显示文摘The Donalda gold deposit in the southern part of the Archean Abitibi greenstone belt consists mainly of a subhonzontal gold-quartz vein perpendicular to subvertical shear zones.The 0.3—0.5 m thick vein is characterized by vein-parallel banding structures indicating multiple episodes of fracture opening and mineral precipitation.Measurement of the c-axis of primary growth quartz indicates that quartz preferentially grew perpendicular to the fracture,suggesting open space filling and/or extensional nature of the fracture.Measurement of the orientations of microfractures,veinlets and fluid—inclusion planes(FIPs) crosscutting primary growth quartz indicates that the vein minerals were subject to a vertical maximum principal stress(σ_1),which is inconsistent with the subhorizontalσ_1 inferred from the regional stress field with N—S shortening.This apparent discrepancy is explained by invoking episodic fluid pressure fluctuation between supralithostatic and hydrostatic regimes accompanied by episodic opening and closing of the sub-horizontal fracture.When fluid pressure was higher than the lithostatic value,the fracture was opened and primary growth minerals were precipitated,whereas when fluid pressure decreased toward the hydrostatic value,the hanging wall of the fracture collapsed,causing collision of protruding primary growth minerals from both sides of the fracture and resulting in formation of vein-parallel deformation bands.The columns where the two facing sides of the fracture collided were subject to higher-than-lithostatic stress due to the bridging effect and reduced support surface area,explaining the development of verticalσ_1.This hypothesis is consistent the fault-valve model,and explains the flipping ofσ_1 without having to change the regional stress field.Guoxiang Chi Jayanta Guha 2011Geoscience Frontiers2011,2,4:3
14ATG12 Conjugation to ATG3 Regulates Mitochondrial Homeostasis and Cell Death显示文摘Lilliana Radoshevich Lyndsay Murrow Nan Chen Estefania Fernandez Srirupa Roy Christopher Fung Jayanta Debnath 2010Cell2010,,4:3
15Twin lintel belt in steel for seismic strengthening of brick masonry buildings显示文摘A single-room, single-storey full-scale brick masonry building with precast RC roofing system was tested thrice under displacement controlled lateral cyclic loading, to assess the effectiveness of the basic repair and seismic strengthening techniques. Initially, the virgin building specimen was loaded laterally to failure. In the second stage, the damaged building was repaired by stitching across the cracks, and tested under the same lateral loading. In the third stage, the twice-damaged structure was repaired once more by stitching and strengthened by twin lintel belt in steel and vertical comer reinforcement,and re-tested. The building strengthened by twin lintel belt in steel showed about 28% higher strength under lateral loading than the virgin building.C.V.R.Murty Jayanta Dutta S.K.Agrawal 2004Earthquake Engineering and Engineering Vibration2004,3,2:2
16Antimicrobial Compounds from Mangrove Plants:A Pharmaceutical Prospective显示文摘Mangroves are salt-tolerant forest ecosystem that extends between tropical and subtropical intertidal regions of the world.Mangroves are biochemically unique vegetation that produce wide array of natural products with immense medicinal potential.These plants are the most valuable resources and provide economic and ecological benefits to the coastal people.Natural products from these plants are of great interest as they provide innumerable direct and indirect benefits to human beings for the discovery of novel antimicrobial and other bioactive compounds.They possess active metabolites with some novel chemical structures that belong to diverse chemical classes such as alkaloids,phenol,steroids,terpenoids and tannins.Several mangrove species have been used in traditional medicine or have few applications as insecticide and pesticide.To date,several mangroves,and their associated species and solvent extracts are screened for antimicrobial activity along with the presence of potent bioactive compounds.The present article emphasizes and creates awareness about the potential mangrove plants and their associates as a source of biologically active compounds with potent antimicrobial properties.This paper also elaborates the mechanisms of action and various methods for screening of antimicrobial compounds.Jayanta Kumar Patra Yugal Kishore Mohanta 2014Chinese Journal of Integrative Medicine2014,20,4:2
17Potential of biochar and organic amendments for reclamation of coastal acidic-salt affected soil显示文摘Salinity and acidity have affected several hundred million hectares of land throughout the globe which poses a major threat to global food security and biodiversity.Application of organic amendments for salt-affected soils has been identified as one of the most effective ways to mitigate salinity-induced problems and considered as a green technique offering twin benefits of waste load reduction and land reclamation.However,studies on reclaiming acidic-salt affected soils are limited.Therefore,this study aimed to determine the reclamation potential of biochars and organic amendments involving Gliricidia sepium biochar produced at 300℃,500℃,and 700℃,green waste compost,and municipal sewage sludge at three different amend-ment ratios,1.0%,2.5%and 5.0%.The incubation experiment was conducted for a 4-month period with different amendment ratios applied to the coastal acidic-salt affected soil.Subsamples were extracted from incubation pots after 1 and 4 months and analyzed for soil chemical parameters(pH,EC,NO_(3)^(−),PO_(4)^(3−,total organic carbon,cation exchange capacity,sodium adsorption ratio,exchangeable sodium percentage)and microbial enzyme activity(catalase activity,and acid-and alkaline phosphatase activity).All organic amendments demonstrated enhancement of the soil properties in a significant manner.However,increasing incubation time and amendment ratio increase the changes of soil parameters by a great percentage.Therefore,the maximum amendment ratio of 5.0%and 4 months of incubation period rendered a significant improvement in the reclamation of acidic-salt affected soil.However,the biochar produced at 500℃ contributed the maximum towards the improved physicochemical and biochemical profile of acidic-salt affected soil,making it the most promising organic amend-ment for the reclamation of acidic-salt affected soil.The overall reclamation efficiency of organic amendments registered the following order of variation:700 BCViraj Gunarathne Athula Senadeera Udaya Gunarathne Jayanta Kumar Biswas Yaser A.Almaroai Meththika Vithanage 2020Biochar2020,2,1:2
18Resuscitation of extremely preterm infants- controversies and current evidence显示文摘Despite significant advances in perinatal medicine, the management of extremely preterm infants in the delivery room remains a challenge. There is an increasing evidence for improved outcomes regarding the resuscitation and stabilisation of extremely preterm infants but there is a lack of evidence in the periviable(gestational age 23-25 wk) preterm subgroup. Presence of an experienced team during the delivery of extremely preterm infant to improve outcome is reviewed. Adaptation from foetal to neonatal cardiorespiratory haemodynamics is dependent on establishing an optimal functional residual capacity in the extremely preterm infants, thus enabling adequate gas exchange. There is sufficient evidence for a gentle approach to stabilisation of these fragile infants in the delivery room. Evidence for antenatal steroids especially in the periviable infants, delayed cord clamping, strategies to establish optimal functional residual capacity, importance of temperature control and oxygenation in delivery room in extremely premature infants is reviewed in this article.Pooja N Patel Jayanta Banerjee Sunit V Godambe 2016World Journal of Clinical Pediatrics2016,5,2:2
19Antiseptic use in the neonatal intensive care unit-a dilemma in clinical practice: An evidence based review显示文摘Infants in the neonatal intensive care unit are highly susceptible to healthcare associated infections(HAI), with a substantial impact on mortality, morbidity and healthcare costs. Effective skin disinfection with topical antiseptic agents is an important intervention in the prevention or reduction of HAI. A wide array of antiseptic preparations in varying concentrations and combinations has been used in neonatal units worldwide. In this article we have reviewed the current evidence of a preferred antiseptic of choice over other agents for topical skin disinfection in neonates. Chlorhexidine(CHG) appears to be a promising antiseptic agent; however there exists a significant concern regarding the safety of all agents used including CHG especially in preterm and very low birth weight infants. There is substantial evidence to support the use of CHG for umbilical cord cleansing and some evidence to support the use of topical emollients in reducing the mortality in infants born in developing countries. Well-designed large multicentre randomized clinical trials are urgently needed to guide us on the most appropriate and safe antiseptic to use in neonates undergoing intensive care, especially preterm infants.Sundar Sathiyamurthy Jayanta Banerjee Sunit V Godambe 2016World Journal of Clinical Pediatrics2016,5,2:2
20Insulin resistance and the pathogenesis of nonalcoholic fatty liver disease显示文摘Jayanta Choudhury Arun J. Sanyal 2004Clinics in Liver Disease2004,,3:2
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