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Metastatic inguinal lymph nodes with two different histological types in a case of carcinoma of unknown primary site

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Journal of Cancer Metastasis and Treatment 2015年第1期1卷 101-103页

作者： Mukur Dipi ray Shivam Vatsal Sunil kumar Department of Surgical Oncology Dr.BRA Institute Rotary Cancer HospitalAll India Institute of Medical SciencesNew Delhi 110029India.

Cancer of unknown primary site is a group of uncommon cancers where patients present with metastatic disease and the primary site is not identifi ed,even after a complete workup to establish the *** metastasis with unknown primary is even more uncommon,and histological type is the most important guiding factor to look for the *** report describes the rare situation of inguinal metastasis with an unknown primary site where a combination of squamous and transitional cell carcinoma was found on fi nal *** highlights the importance of multimodality approach including an aggressive surgical resection combined with adjuvant radiation therapy to achieve an optimal outcome.

关键词： Carcinoma of unknown primary site inguinal metastasis squamous cell carcinoma transitional cell carcinoma

RESEARCH ANNOUNCEMENTS ON“MAXIMAL ERGODIC INEQUALITIES FOR SOME POSITIVE OPERATORS ON NONCOMMUTATIVE LP-SPACE”

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数学杂志 2020年第6期40卷 631-637页

作者： HONG Gui-xiang ray Samya kumar WANG Si-meng School of Mathematics and Statistics Wuhan universityWuhan 430072China UniversiéParis-Saclay CNRSLaboratoire de mathématiques d’OrsayOrsay 91405France

1 Introduction and Main Results In classical ergodic theory,one of the earliest pointwise ergodic convergence theorems was obtained by Birkhoff[1]in *** and Schwartz[2]greatly generalized the previous situation;they e... 详细信息

关键词： convergence SPACE maximal

Determination of the particle load based on detailed suspended sediment measurements at a hydropower plant

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International Journal of Sediment Research 2019年第5期34卷 409-421页

作者： Anant kumar Rai Arun kumar Alternate Hydro Energy Centre

Suspended sediment particles contained in inflows of water systems of hydropower plants(HPPs) cause hydro-abrasive erosion of the hydraulic turbines and structures leading to significant maintenance costs,efficiency reductions, and downtime. Relevant parameters such as suspended sediment concentration(SSC), particle size distribution(PSD), shape, and mineralogical composition were measured with an online multi-frequency acoustic instrument and based on manually taken samples from the end of the sand trap of the Toss HPP in the Himalayan region, India. In the laboratory, the samples were analyzed using the gravimetric method, laser diffraction, turbidity, dynamic digital image processing, scanning electron microscope, petrography analysis, energy-dispersive X-ray spectroscopy, and X-ray *** online instrument and the samples provided measurement results at a single point. To investigate vertical gradients in concentration and particle sizes, additional samples were collected 9 times at 7 relative water depths. The SSC, most particle sizes, and particle shape were found to be evenly distributed over depth except d90, i.e. the diameter which is not exceeded by 90% of the particle mass. d90 measured at 76% of the water depth was in the range of fine sand and was multiplied by 1.05 to obtain an average value representative for the entire depth. Improved methodologies to quantify both particle shape and size in an analytical model for hydro-abrasive erosion are proposed. Also, the PSD measuring performance of laser diffraction and dynamic imaging was studied and similar values of the median particle sizes were obtained from both instruments. Further, multi-frequency acoustic, turbidity and laser diffraction techniques were found suitable for SSC measurement at the test case HPP.

关键词： Suspended sediment concentration Hydro-abrasive erosion Hydropower Particle size distribution Particle shape Mineralogical composition

Cell Size versus Taxonomic Composition as Determinants of As (III &V) Sensitivity in the Estuarine Diatom Communities

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Journal of Water Resource and Protection 2011年第6期3卷 363-369页

作者： Chumki Chowdhury Natasha Majumder Sanjay kumar Mandal Manab kumar Dutta Raghab ray Tapan kumar Jana 不详

Despite scarce studies have analyzed the relative growth inhibition of As (III) and As (V) to diatom, clear pattern of interspecies difference have been shown, identifying cell size as a key property determining the sensitivity of diatom to As. Evidence from cultures suggests that cell size is a key factor in determining the extent of arsenic (III) & (V) stress of diatom, with relatively lesser effects of As (V) than As (III) on small cells. Cent percent growth inhibition was observed for large size group (Coscinodiscus radiatus, Surirella, Amphipleura, Thalassiothrix, Cyclotella and Thalassiosira decipiens) relative to smaller size group (Skeletonema cf. costatum, Navicula rhombica, Amphora hyaline, Nitzschia longissima except Thalassisira. Interspecies differences in As tolerance by diatom in the mangrove ecosystem indicates cell size could be only one factor contributing to these differences. The results show that 81.7% of total arsenic was uptaken from culture media originally amended with arsenic. Looking to the extreme tolerance and arsenic removal efficiency, application of the species with smaller cell size relative to the other tested diatom for bioremediation purpose can be envisaged.

关键词： Diatoms Cell Size Arsenic (III&V) Mangrove

Spatio-temporal assessment of soil salinization utilizing remote sensing derivatives,and prediction modeling:Implications for sustainable development

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Geoscience Frontiers 2024年第6期15卷 22-36页

作者： Prashant kumar Prasoon Tiwari Arkoprovo Biswas Prashant kumar Srivastava Department of Geology Centre of Advanced StudyInstitute of ScienceBanaras Hindu UniversityVaranasi 221005U.P.India Institute of Environment and Sustainable Development Banaras Hindu UniversityVaranasi 221005U.P.India

This study aims to investigate the combined use of multi-sensor datasets(Landsat 4–5&8 OLI satellite imagery,spatial resolution=30 m)coupled with field studies to evaluate spatio-temporal dynamics of soil salinization along the coastal belt in West Bengal,*** study assesses soil salinization by mapping the salinity and electrical conductivity of saturation extract(ECe)and utilizing spectral signatures for estimating soil *** SI change(%)was analyzed(2021–1995),categorizing increases in salinity levels into 5%,10%,and 50%changes possibly due to salt encrustation on the soil *** land use land cover(LULC)change map(2021–1995)demonstrates that the study area is continuously evolving in terms of ***,in the study area,soil salinity ranges from 0.03 ppt to 3.87 ppt,and ECe varies from 0.35 dSm^(-1)to 52.85 dSm^(-1).Additionally,vulnerable saline soil locations were further *** of soil salinity based on ECe reveals that 26%of samples fall into the nonsaline category,while the rest belong to the saline *** Spectral signatures of the soil samples(n=19)acquired from FieldSpec hand spectrometer show significant absorption features around 1400,1900,and 2250 nm and indicate salt *** results of reflectance spectroscopy were crossvalidated using X-ray fluorescence and scanning electron *** study also employed partial least square regression(PLSR)approach to predict ECe(r^(2)=0.79,RMSE=3.29)and salinity parameters(r^(2)=0.75,RMSE=0.51),suggesting PLSR applicability in monitoring salt-affected soils *** study’s conclusion emphasizes that remote sensing data and multivariate analysis can be crucial tools for mapping spatial variations and predicting soil *** has also been concluded that saline groundwater used for irrigation and aqua-cultural activities exacerbates soil *** study will help policymakers/farmers identify the salt degradation problem more effectivel

关键词： Hyperspectral remote sensing Scanning electron microscopy X-ray fluorescence Partial least square regression Soil salinity Salinity index

Role of Microstructural Constituents on Surface Crack Formation During Hot Rolling of Standard and Low Nickel Austenitic Stainless Steels

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Acta Metallurgica Sinica(English Letters) 2013年第2期26卷 206-216页

作者： Manidipto Mukherjee Tapan kumar Pal Welding Technology Centre Metallurgical and Material Engineering Department Jadavpur University

The effect of alloy segregation and delta （δ） ferrite contents on surface cracking of three standard （i.e. AISI 304L, AISI 310S and AISI 321） and two low nickel （i.e. LNi-1 and LNi-0.3） austenitic stainless steels （ASS） during hot roiling was investigated using optical microscopy （OM）, automatic image analyzer, scanning electron microscopy （SEM）, energy dispersive X-ray spectroscopy （EDX） and electron probe micro analyzer （EPMA）. It was observed that the amount of 6-ferrite varied among different grades and also distributed heterogeneously across the width of the steel plates. In general, low nickel ASS showed higher amount of 6-ferrite compared to the standard ASS grades. The tendency to surface cracking during hot rolling gradually increased with increasing 6-ferrite content. Interestingly, carbon and nitrogen exerted maximum effect on 6-ferrite formation. The higher carbon and nitrogen content in the steel decreased 6-ferMte content. In addition, the segregation of Cu and Mn plays significant role in low nickel ASS and Ni-Cr in case of standard ASS has profound effect on surface cracking of the steel plates. A possible cause of surface crack formation/origination in steel plates during hot rolling was discussed.

关键词： Austenitic stainless steel Hot rolling Surface cracking Alloy segregation δ ferrite

Rare earth elements in flotation products of coals from East Kootenay coalfields,British Columbia

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Journal of Rare Earths 2019年第12期37卷 1366-1372页

作者： Vinoth kumar Kuppusamy Maria Holuszko NBK Institute of Mining Engineering University of British Columbia

With the identification of coal deposits that are enriched in rare earth elements(REEs)across the world,coal and coal by-products are considered as an alternative source for REEs due to the combined supply and demand restrictions for these *** are being conducted to recover these elements from various coal *** this study,coal samples from the East Kootenay coalfields in British Columbia,Canada were examined for the presence of REEs in run-of-mine coal samples and flotation *** reveal that on an ash basis,the concentration of REEs varies from 174 to 1038 mg/kg in the *** understand the REE as sociation,which is essential for extraction purposes,a three-step sequential extraction process along with a mineralogical evaluation using scanning electron microscopy(SEM)with energy dispersive X-ray spectroscopy(EDX)and quantitative X-ray diffraction(XRD)data was *** is found that a significant portion of REEs in the feed samples were reported to middling and tailings *** mineralogical analyses reveal REE association with aluminosilicate mineral in the samples.

关键词： Rare earth elements Coal East Kootenay coalfields Mode of occurrence

RTV silicone rubber composites reinforced with carbon nanotubes,titanium-di-oxide and their hybrid:Mechanical and piezoelectric actuation performance

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Nano Materials Science 2021年第3期3卷 233-240页

作者： Vineet kumar Anuj kumar Sung Soo Han Sang-Shin Park School of Mechanical Engineering Yeungnam UniversitySouth Korea School of Chemical Engineering Yeungnam UniversitySouth Korea

The use of nanofillers with high surface area and extreme purity in polymer composite is an effective strategy to obtain high performance polymeric ***,the effect of nanofillers such as carbon nanotubes(CNT),titanium dioxide(TiO_(2)),and their hybrid on rubber-based composites was *** this study,rubber nanocomposites were fabricated by using room temperature vulcanized(RTV)silicone rubber matrix and nanofillers(***,TiO_(2),and CNT-TiO_(2))through solution casting ***,the purity and surface area of CNT(purity:>96%and BET surface area:300 m2/g)and TiO_(2)(purity:>98%and BET surface area:165 m2/g)were estimated by field emission scanning electron microscopy/energy dispersive X-ray(FESEM-EDX)and adsorption *** mechanical properties of the rubber nanocomposites were enhanced by incorporating *** compressive modulus was 2.18 MPa for unfilled composites and increased to 6.8 MPa(CNT),3.95 MPa(CNT-TiO_(2)),and 2.44 MPa(TiO_(2))at 5 phr,***,the tensile strength was 0.54 MPa for unfilled composites and increased to 1.37 MPa(CNT),1.33 MPa(CNT-TiO_(2))and 0.61 MPa(TiO_(2))at 5 phr,***,the actuation displacement was improved with increasing input voltage and it was 2 mm for CNT,1.6 mm for CNT-TiO_(2) hybrid and 0.5 mm for TiO_(2) at 10 ***,a series of experiments show the potential application in piezoelectric actuation.

关键词： Multi-walled carbon nanotubes Titanium dioxide Hybrid Mechanical properties Piezoeletric actuation

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有效利用白炭黑的活性化合物

橡胶参考资料 1996年第8期26卷 14-24页

作者： swapan kumar Mandal Dipak kumar Basu 樊玉燕

前言直到实用的补强白炭黑问世之前,橡胶工业一直处在为炭黑可以付出任何代价的状态,而且还认为炭黑是制备硫化胶最重要的补强填充剂。起初,补强白炭黑能够满足轮胎、输送带、汽车配件、垫圈、密封件及其它橡胶制品用胶料的要求,是因为... 详细信息

前言直到实用的补强白炭黑问世之前,橡胶工业一直处在为炭黑可以付出任何代价的状态,而且还认为炭黑是制备硫化胶最重要的补强填充剂。起初,补强白炭黑能够满足轮胎、输送带、汽车配件、垫圈、密封件及其它橡胶制品用胶料的要求,是因为它具有极好的性能,如抗撕裂性、硬度、刚度。

关键词：橡胶白炭黑活性化合物