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Evidences for Incipient Hydrothermal Event(s) in the Central Indian Basin: A Review

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Acta Geologica Sinica(English Edition) 2005年第1期79卷 77-86页

作者： Sridhar D. IYER National Institute of Oceanography Dona Paula Goa 403 004 India

The Central Indian Basin (CIB, 10°-19°S) encompasses morphotectonic features such as seamounts, abyssal hills, faults, fracture zones and lineations and basic to silicic volcanics that were derived from different sources. Instances of incipient hydrothermal event (s) occurred as evident from: (1) spilites that probably formed due to low-temperature hydrothermal action on the precursory basalts, (2) slabs and fragments of zeolitites which are the consequent products of palagonitization of the basaltic glasses, (3) chemical variations in the ferromanganese crusts, and (4) abundance of volcanogenic-hydrothermal material (vhm) that includes ochrous sediments and magnetite spherules. The vhm suggests its origin by interaction of Fe-rich hydrothermal solutions with surrounding sediments. The CIB spherules occur in sediments of~10 ka and ~425 to 650 ka age and are orders of magnitude younger than the 50 to 60 Ma age of the basin. Incidentally, to the north of the basin at ODP Site 717-719(1 °S/81 °E) hydrothermal precipitates of inorganic calcite and deposition of sulphide minerals (~7.5 to 9 Ma and 0.5 Ma) occur as a result of the on-going intraplate deformation. This paper reviews the above evidences that possibly indicate episodes of localized hydrothermal events in the CIB.

关键词： Central Indian Basin morphotectonics volcanics hydrothermal events synopsis

Physical Properties,Morphology and Petrological Characteristics of Pumices from the Central Indian Ocean Basin

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Acta Geologica Sinica(English Edition) 2011年第4期85卷 826-839页

作者： Niyati G.KALANGUTKAR Sridhar D.IYER Dandaydayudapani ILANGOVAN National Institute of Oceanography(Council of Scientific and Industrial Research) Dona PaulaGoa 403 004India

About 400 pumice clasts collected from the Central Indian Ocean Basin（CIOB）were studied for their morphology and were classified based on their shape and size.A majority of the samples range between1 cm and 36 cm and in the Zinggs shape diagram plot in the equant and oblate *** Corey Shape Factor for most of the samples is close to 0.7,which is common for volcaniclastic material. The physical properties such as density,specific gravity,void ratio,porosity,moisture content and degree of saturation,were determined for 30 pumice *** varies from 0.21 to 0.74 g/cm^3 specific gravity 1.84 to 3.27,void ratio 2.21 to 10.67,porosity 67%to 91%,moisture content during sinking 0.44 to 2.35 and degree of saturation varies from 26.5%to 86%.Binocular and electron microscopy studies reveal that 60%of the vesicles are elongated,30%are spherical and 10%are *** of the pumices exhibits vitrophyric texture with phenocrysts of feldspars and clinopyroxenes.X-ray diffractrogram and mineral analyses confirm plagioclase to be a major phase, while quartz and orthoclase are not *** is commonly present in the ferromanganese oxide coating present over some of the *** paper also delves into some details concerning the controversial origin of the pumices and glass shards in the CIOB.

关键词： pumice physical properties submarine Central Indian Ocean Basin

Preparation and characterization of a new magnetic fluid with good low temperature resistance

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Nano Research 2025年第1期18卷 477-486页

作者： Shilin Nie Decai Li ✉1 Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China State Key Laboratory of Tribology in advanced equipment Tsinghua UniversityBeijing 100084China

Magnetic fluids are a type of novel functionalmaterial that has emerged over the past two decades, whichhave found applications in various aspects of production anddaily life. However, the application of conventional magneticfluids in low-temperature environments is severely limited andoften unsatisfactory. To address this issue, we havedeveloped a new magnetic fluid with excellent low-temperatureresistance. Initially, bare Fe_(3)O_(4) magnetic nanoparticles(FMNPs) were synthesized via co-precipitation without aprotective gas. Subsequently, these particles were modified using polyethylene glycol (PEG)-4000 as a surfactant. Thebare and modified FMNPs (MFMNPs) were characterized using X-ray diffraction (XRD), vibrating sample magnetometer(VSM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and thermogravimetricanalysis-differential thermal gravimetric (TGA-DTG) analysis. The rheological properties, low-temperature resistance of themagnetic fluid were also evaluated. The characterization results indicate that the MFMNPs are spherical andmonodisperse, with a narrow size distribution and a mean particle size of approximately 12 nm. Furthermore, the FTIRspectra and TGA-DTA results suggest that PEG-4000 is linked to the bare Fe_(3)O_(4) particles via hydrogen bonding, indicatingsuccessful modification of the Fe_(3)O_(4) magnetic nanoparticles using PEG. VSM measurements demonstrate that surfacemodification does not alter the crystal morphology or superparamagnetic of Fe_(3)O_(4). However, it does reduce the saturationmagnetization from 68.17 to 54.75 emu/g. Additionally, the prepared magnetic fluid exhibits shear thinning and magneticviscosity effects. It also exhibits excellent low-temperature resistance, maintaining good fluidity without freezing even at -60 ℃. In summary, these results collectively indicate that the new low-temperature resistant magnetic fluid developed in thisstudy is stable and has broad application prospects.

关键词： magnetic fluid low-temperature resistance polyethylene glycol ethylene glycol aqueous solution superparamagnetic

Removal of Safranine from Aqueous Solution by Using Adsorptive Bubble Separation Techniques

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Chinese Chemical Letters 2005年第5期16卷 701-704页

作者： ChungShinLU ChiingChangCHEN YaPingSU KungTungCHEN Departmentofgeneraleducation NationalTaichungNursingCollegeTaichungTaiwan403 Departmentofgeneraleducation MingHsinUniversityofScienceandTechnology.Hsin-ChuTaiwan304

Safranine, a cationic dye, was removed from synthetic wastewater by ion flotation. Over 98% of safranine was removed from the solution in 10 min. A stoichiometric amount of surfactant (1 mol of surfactant to 1 mol of dye) was found to be most effective for safranine removal. The separation efficiency of safranine decreased with increasing concentration of NaNO3. Safranine was also removed by adsorbing colloid flotation technique using Fe(OH)3 as the coagulant. Sodium lauryl sulfate was used as the collector, and over 97% of safranine was removed in 5 min. The separation efficiency decreased with increasing ionic strength of the solution. The deleterious effect of neutral salt was compensated somewhat with the aid of Al3+ as the activator. Both ion flotation and adsorbing colloid flotation may be applicable in the removal of safranine from wastewater.

关键词： Safranine ion flotation adsorbing colloid flotation.

Late Cenozoic seismic stratigraphy of the Andaman Forearc Basin,Indian Ocean

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Petroleum Science 2017年第4期14卷 648-661页

作者： Dhananjai K.Pandey Goli Anitha Ramesh Prerna Anju Pandey ESSO-National Centre for Antarctic and Ocean Research Headland SadaVasco da GamaGoa 403 804India

Interpretation of new multichannel seismic reflection data from the Andaman Forearc Basin(AFB) in the northern Indian Ocean is presented here. The highquality multichannel seismic data from the Andaman Forearc region enable us to examine the seismic characters and to demarcate seismic sequences bounded by distinct unconformities. Ages of marked seismic horizons have been calibrated with available litholog data from nearby industry boreholes. Seismic interpretation of new data shows that the AFB is filled with * 4.5-s-two way travel time(TWT) thick Neogene to Recent sediments. The entire basin assemblage exhibits two distinct major sequences pertaining to the Neogene and Quaternary times. A large part of the basin is filled with intermittent mass transport deposits(MTD). We infer that the episodic uplift of the Invisible Bank, protuberance of the outerarc and regular deformation through reactivation of preexisting normal faults since the Pleistocene could be attributed as causal mechanisms for the MTDs. Strong bottom simulating reflectors are identified in the Late Miocene and younger sediments of the outerarc and AFB at a depth of * 0.6 s TWT and correspond to the presence of gas hydrates in this region. Our interpretations have significant implications for geodynamic as well as resource exploration in the AFB.

关键词： Andaman Forearc Basin Neogene Uplift Invisible Bank Outerarc Stratigraphy

HIGH TEMPERATURE MOIRE INTERFEROMETRY TECHNOLOGY

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Chinese Journal of Aeronautics 1996年第4期9卷 289-295页

作者： Zhang Guozhou Zhuang Yunan B. S. J. Kang, Wang Fengxiang(Faculty 403, Beijing University of Aeronautics andAstronautics, Beijing, China, 100083) Faculty 403 Beijing Univ. Aero. and Astronaut. Beijing 100083 China

In order to investigate the survivable specimen gratings, the crossed-line300 lines/mm gratings were chemically etched directly into the surface of the *** order to obtain high diffraction efficiency and to minimize the shear lag, the etcheddepth of the gratings was one fourth the wave length of coherent light. The influence ofthe uneven window on the high temperature moire interferometry was preliminarily analyzed. The quartz and inconel 718 specimens were tested up to 1200℃ and 900℃. Thecrack tip deformation singular field as well as load-induced and thermal expansion displacement fields were measured by means of high temperature moire interferometry.

关键词： high temperature moire interferometry diffraction gratings (spectra)

地龙胶囊（912）抗癌作用研究的回顾与前瞻

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中国肿瘤临床 1991年第3期18卷 131-132页

作者：王克为第四军医大学403—1室

本文介绍了课题研究的原委,基础研究及临床研究的主要结论。开展国内协作及国际协作的情况,进一步研究的设想。已取得的结果表明:地龙胶囊(912)无任何毒副作用,对小鼠移植瘤(S180,S794,H22,EMT-6)有抑制作用。临床研究证明单独给予912... 详细信息

本文介绍了课题研究的原委,基础研究及临床研究的主要结论。开展国内协作及国际协作的情况,进一步研究的设想。已取得的结果表明:地龙胶囊(912)无任何毒副作用,对小鼠移植瘤(S180,S794,H22,EMT-6)有抑制作用。临床研究证明单独给予912对食管癌有抑制作用,晚期食管癌的部分缓解率为43％。912与化疗药物联合应用,肺癌的近期有效率为79.1％,优于单纯化学治疗的57.1％(P12和放射治疗,肿瘤的完全缓解率为41.4％,高于单纯放射治疗的22.4％(P12的抗癌作用机理可能与改善机体免疫与清除自由基有关。对912的抗癌有效成分,进行了初步探索实验。

关键词：地龙抗癌作用辐射增效作用蚯蚓

Dynamics of sea-ice biogeochemistry in the coastal Antarctica during transition from summer to winter

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Geoscience Frontiers 2017年第3期8卷 507-516页

作者： Suhas Shetye Babula Jena Rahul Mohan National Institute of Oceanography Donapaula Goa 403004 India National Centre for Antarctic and Ocean Research Headland Sada Goa 403 804 India

The seasonality of carbon dioxide partial pressure （pC02）, air-sea CO2 fluxes and associated environ- mental parameters were investigated in the Antarctic coastal waters. The in-situ survey was carried out from the austral summer till the onset of winter （January 2012, February 2010 and March 2009） in the Enderby Basin. Rapid decrease in pCO2 was evident under the sea-ice cover in January, when both water column and sea-ice algal activity resulted in the removal of nutrients and dissolved inorganic carbon （DIC） and increase in pH. The major highlight of this study is the shift in the dominant biogeochemica/ factors from summer to early winter. Nutrient limitation （low Si/N）, sea-ice cover, low photosynthetically active radiation （PAR）, deep mixed layer and high upwelling velocity contributed towards higher pCO2 during March （early winter）. CO2 fluxes suggest that the Enderby Basin acts as a strong CO2 sink during January （-81 mmol m-2 d 1）, however it acts as a weak sink of CO2 with -2.4 and -1.7 mmol m 2 d-1 during February and March, respectively. The present work, concludes that sea ice plays a dual role towards climate change, by decreasing sea surface pCO2 in summer and enhancing in early winter. Our observations emphasize the need to address seasonal sea-ice driven CO2 flux dynamics in assessing Antarctic contributions to the global oceanic CO2 budget.

关键词： pCO2 fluxes Upwelling Antarctica Sea-ice

Surface and Through Curing Studies by ATR

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光学学报 2003年第S1期23卷 108-109页

作者： Chun Kee Ann Jae Myoung Ryu Dae Sung Lee Luvantix Co. Ltd. 403-2 Moknae Danwon Ansan Kyoungki Republic of KoreaLuvantix Co. Ltd. 403-2 Moknae Danwon Ansan Kyoungki Republic of KoreaLuvantix Co. Ltd. 403-2 Moknae Danwon Ansan Kyoungki Republic of Korea

The degrees of surface and through cure of UV curable acrylate-based pigmented systems were studied by using ATR(Attenuated Total Reflection) spectroscopy. This paper describes curing investigations of ink coating lay... 详细信息

关键词： Surface and Through Curing Studies by ATR UV on by RAU were of into