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细菌碱性蛋白酶进行环境友好性无灰无硫化物酶脱毛的研究

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北京皮革（中外皮革信息版）（中） 2008年第7期 79-84页

作者： s.sivasubramanian[印度] B.Murali Manohar[印度] A.Raiaram[印度] R.Puvanakrishnan[印度] 王睿[编译] 不详四川大学皮革化学与工程教育部重点实验室成都610065

随着人们对于制革工业的环境影响的关注日益加强，使得发展酶制剂代替造成污染的化学品进行制革工艺生产成为必要。在本研究中，采用一种细菌碱性蛋白酶的保毛工艺实施酶脱毛，彻底的杜绝使用石灰和硫化物。为了评价酶脱毛工艺的效率，... 详细信息

随着人们对于制革工业的环境影响的关注日益加强，使得发展酶制剂代替造成污染的化学品进行制革工艺生产成为必要。在本研究中，采用一种细菌碱性蛋白酶的保毛工艺实施酶脱毛，彻底的杜绝使用石灰和硫化物。为了评价酶脱毛工艺的效率，我们对两个对照样进行了广泛的研究：一个是传统的石灰一硫化物工艺，另外一个是在减少石灰和硫化物的情况下添加酶制剂的酶脱毛工艺。我们开发的工艺较之对照样，在6小时内即可达到完全酶脱毛，缩短了脱毛时间，同时，由于酶脱毛依靠浸渍法从而避免使用硅酸盐载体。对脱毛后的皮进行组织学和扫描电子显微镜分析发现酶脱毛工艺可以完全除去毛和表皮，并且可以适当打开真皮层的纤维结构。胶原并没有被破坏，成革质量令人满意。该工艺很大程度上减少了废水排放，例如生化需氧量、化学需氧量，总溶解固体，总悬浮固体都降低了。物理化学性质的研究也表明酶脱毛工艺得到的皮革质量与对照系统的皮革质量相当，甚至超过后者。所以，发展酶脱毛工艺进行绿色脱毛模式对于面对环境压力的制革行业来说，具有深远的影响。

关键词：蛋白酶皮革污染胶原石灰蛋白聚糖

system Identification of Heritage structures Through AVT and OMA:A Review

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structural Durability & Health Monitoring 2019年第1期13卷 1-40页

作者： Vinay shimpi Madappa V.R.sivasubramanian s.B.singh Department of Civil Engineering National Institute of Technology PuducherryKaraikal609609India Department of Civil Engineering Birla Institute of Technology and Science PilaniPilani333031India

In this review article,the past investigations carried out on heritage structures using Ambient Vibration Test(AVT)and Operational Modal Analysis(OMA)for system identification(determination of dynamic properties like frequency,mode shape and damping ratios)and associated applications are summarized.A total of 68 major research studies on heritage structures around the world that are available in literature are surveyed for this *** first,field investigations carried out on heritage structures prior to conducting AVT are explained in ***,specifications of accelerometers,location of accelerometers and optimization of accelerometer networks have been elaborated with respect to the geometry of the heritage *** addition to this,ambient vibration loads and data acquisition procedures are also ***,the state of art of performing OMA techniques for heritage structures is explained ***,various applications of system identification for heritage structures are ***,conclusions are made towards errorless system identification of heritage structures through AVT and OMA.

关键词： Ambient Vibration Test(AVT) heritage structures Operational Modal Analysis(OMA) structural assessment system identification

Low temperature Raman scattering study of barium doped lead ytterbium tantalate ceramics

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Journal of Advanced Dielectrics 2017年第1期7卷 17-21页

作者： Dibyaranjan Rout swetapadma Praharaj V.subramanian V.sivasubramanian Department of Physics School of Applied SciencesKIIT University Bhubaneswar-751024OdishaIndia Department of Physics Indian Institute of TechnologyMadras Chennai-600036India Materials science Division IGCARKalpakkam-603102India

Raman spectra of a complex perovskite system(Pb_(1-x)Ba_(x))(Yb_(0.5)Ta_(0.5))O_(3),x=0.0;0.1 and 0.2 have been studied at low temperature in the range of 10–250 *** fascination of the system is that it undergoes a crossover from a highly ordered antiferroelectric(x=0.0)to ferroelectric(x=0.1)to disordered relaxor ferroelectric(x=0.2).The nature of splitting that prevails in F_(2g)(≈60 cm^(-1)),F_(1g)(≈538 cm^(-1))modes and their gradual merging and disappearance with x indicates an orthorhombic symmetry for x=0.0 and a pseudo-cubic structure for x=*** mode at 420 cm^(-1) suggests the existence of rhombohedral distortion in all the *** soft mode behavior of the F2g modes has been analyzed by fitting the data with the power law ω_(s)=A(T_(C)-T)^(β).

关键词： Perovskite oxides B-site ordering Raman scattering soft mode

An analysis of land use development city using imagery pattern in the industrial high resolution satellite

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Journal of Geographical sciences 2011年第1期21卷 79-88页

作者： John Prince soundranayagam P. sivasubramanian N. Chandrasekar K.s.P. Durairaj Centre for GeoTechnology Manonmaniam Sundaranar University Tirunelveli-627012 India Department of Geology V.O.Chidambaram College Tuticorin-628008 India The controller Manonmaniam sundaranar University Tirunelveli-627012 India

The spatial differentiation of land use changes of Tuticorin is studied using high resolution LIss III satellite imagery and Maximum Likelihood algorithms. The classification accuracy of 95.2% was obtained. In this study,the land use of Tuticorin is classified as settlement,salt pan,agricultural land,wasteland,water bodies and shrubs. The settlement area is increased to 4.6 km2 during the year 2001 and 2006. The settlement area change is mainly driven by growth of industries and migration of people from peripheral villages. shrub is increased to 3.63 km2 in the six year period. Water logging due to growth of shrubs in Tuticorin leads to several environmental and health hazard. This study warrants proper urban planning for Tuticorin for sustainable use of resource and environment.

关键词： land use urban planning remote sensing environment health hazard

Anti-chikungunya activity of luteolin and apigenin rich fraction from Cynodon dactylon

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Asian Pacific Journal of Tropical Medicine 2015年第5期8卷 352-358页

作者： Krishnan saravana Murali srinivasan sivasubramanian savariar Vincent shanmugaraj Bala Murugan Bupesh Giridaran sundaram Dinesh Palani Gunasekaran Kaveri Krishnasamy Ramalingam sathishkumar Plant Genetic Engineering Lab Department of Biotechnology.Bharathiar University Department of Virology King Institute of Preventive Medicine and Research Centre for Environmental Research and Development and Loyola Institute of Frontier Energy Loyola College Vellore Institute of Technology Plant Genetic Engineering Lab Department of BiotechnologyBharathiar University

Objective:To obtain Iuteolin and apigenin rich fraction from the ethanolic extract of Cynodon dactylon(L.)(***) Pers and evaluate the fraction's cytotoxicity and anti-Chikungunya potential using Vero ***:The ethanolic extract of *** was subjected to silica gel column chromatography to obtain anti-chikungunya virus(CHIKV) *** phase-HPLC and GC-Ms studies were carried out to identily the major phytochemicals in the fraction using phylochemical *** and the potential of the fraction against CHIKV were evaluated in vitro using Vero *** in viral replication was assessed by reverse transcriptase-polymerase chain reaction(RT-PCR) after treating the viral infected Vero cells with the ***:Reverse Phase-HPLC and GC-Ms studies confirmed the presence of flavonoids,luteolin and apigenin as major phytochemicals in the anti-CHIKV ethanolic fraction of ***- The fraction was found to exhibit potent viral inhibitory activity(about 98%) at the concentration of 50 μg/mL as observed by reduction in cytopathic effect,and the cytotoxic concentration of the fraction was found to be 250 μg/***-PCR analyses indicated that the reduction in viral mRNA synthesis in fraction treated infected cells was much higher than the viral infected control ***:Luteolin and apigenin rich ethanolic fraction from *** can be utilized as a potential therapeutic agent against CHIKV infection as the fraction does not show cytotoxicity while inhibiting the virus.

关键词： Antiviral activity Chikungunya virus Cynodon dactylon Flavonoids Luteolin Apigenin

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细菌碱性蛋白酶的脱毛机理研究

北京皮革（中外鞋讯）（下） 2012年第4期 83-90页

作者： s. sivasubramanian B. Murali Manohar R. Puvanakrishnan 刘兰（编译）不详四川大学制革清洁技术国家工程实验室四川成都610065

在皮革生产的常规脱毛工艺过程中，原料皮都将遭受到强烈的化学处理，而这一强烈的化学处理通常是由于使用了石灰和硫化钠所致。硫化物之所以能够起到脱毛的作用，是由于它能够破坏存在于毛发和表皮中的角蛋白上的双硫健，因此能够使得... 详细信息

在皮革生产的常规脱毛工艺过程中，原料皮都将遭受到强烈的化学处理，而这一强烈的化学处理通常是由于使用了石灰和硫化钠所致。硫化物之所以能够起到脱毛的作用，是由于它能够破坏存在于毛发和表皮中的角蛋白上的双硫健，因此能够使得毛和表皮从生皮上脱落下来。石灰作为一种碱性物质，由于能够清除蛋白聚糖中的大部分粘多糖、皮肤结缔组织间的纤维间质。因此能够起到松散皮纤维的目的。而作为一种町替代常规化学脱毛法的酶脱毛方法，由于其具有环保效益（酶脱毛方法避免了石灰和硫化物的使用），近年来得到了快速的发展。虽然使用石灰和硫化物的化学品脱毛处理与使用酶制剂的酶脱毛处理，其目的都是为了去除非胶原蛋白和蛋白聚糖，以达到松散胶原纤维的目的，然而，两种方法的机理却是截然不同的。任本项研究中，我们对具有保毛脱毛作用的细菌碱性蛋白酶的酶脱毛机理及作用进行了详细的研究，并将具与具有毁毛脱毛作用的化学脱毛法进行了对比。通过对生化成分的定量分析表明，按两种处理方法处理后的脱毛皮中的胶原蛋白含量相当，而酶脱毛皮中的蛋白聚糖含量相比石灰一硫化物脱毛皮中的蛋白聚糖含量有显著的减少。且这一实验结果也通过对脱毛皮的断面使用不同染色泫的组织化学观察和免疫组织化学染色法观察（可检验核心蛋白聚糖的去除情况），得到了进一步的验证。另外，高效液相色谱分析也表明，核心蛋白聚糖已差不多完全被细菌蛋白酶所分解。因此，在本项研究中，我们可以得出这样的结论：在酶脱毛工艺过程中，核心蛋白聚糖的蛋白降解及随之引起的蛋白聚糖的去除对于胶原纤维束的松散具有十分重要的作用。

关键词：皮革蛋白聚糖胶原蛋白核心蛋白聚糖组织学免疫组织化学

Design Of Low Noise Amplifier At 4 Ghz

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Design Of Low Noise Amplifier At 4 Ghz

PRECURsOR DYNAMICs OF Pb(B_(1/2)B0_(1/2))O_(3)-TYPE RELAXOR FERROELECTRICs sTUDIED BY BROADBAND MICRO-BRILLOUIN sCATTERING

International Conference on Information and Electronics Engineering（ICIEE 2011）

作者： Abhimanyu Athikayan Aswathy Premanand Athira Damodaran Gayathry Girisan Jyothish Nair sowmya sivasubramanian Karthigha Balaburugan Jayakumar Applied Electromagnetic Research Group Department Of ECE Amrita School Of EngineeringCoimbatore-641105India

In first stage of each microwave receiver there is Low Noise Amplifier（LNA） circuit,and this stage has important rule in quality factor of the *** design of a LNA in Radio Frequency（RF） circuit requires the trade-off many importance characteristics such as gain,Noise Figure（NF）,stability,power consumption and *** situation forces designers to make choices in the design of RF *** this paper the aim is to design and simulate a single stage LNA circuit with high gain and low noise using GaAs FET for frequency of 4 *** design simulation process is done using ANsOFT designer.A single stage LNA has successfully been designed with 8.53 dB forward gain and 1.26 dB noise figure at frequency of 4GHz.

关键词： LNA s-Band Ansoft GaAs FET

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Journal of Advanced Dielectrics 2012年第2期2卷 74-84页

作者： sEIJI KOJIMA MUHTAR AHART VENKATAsUBRAMANIAN sivasubramanian ALEXEI.A.BOKOV ZUO-GUANG.YE PAs University of Tsukuba TsukubaIbaraki 305-8573Japan Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA Indira Gandhi Centre for Atomic Research Kalpakkam-603102 India Department of Chemistry and 4D LABs simon Fraser University Burnaby BCCanada V5A 1S6

This paper reviews the recent progress in the understanding of the dynamics of Pb(B_(1/2)B0_(1/2))O_(3)-type relaxor ferroelectrics using of broadband micro-Brillouin scattering spectroscopy,which covers a large frequency range from 1 to 1000 GHz by a tandem multi-pass FabryPerot inter*** contrast to Pb(B_(1/3)B0_(2/3))O_(3)-type relaxors,there is no frustration on the B-site of perovskite structure and the degree of order of B-site cations depends on heat *** softening of sound velocity and an intense central peak are observed above the Curie temperature TC owing to the polarization°uctuations in polar nanoregions(PNRs).Unlike the Pb(B_(1/3)B0_(2/3))O_(3)relaxors,Pb(B_(1/2)B'_(1/2))O_(3)does not undergoes a typical diffuse phase transition without lead vacancies on A-site which enhances *** the(1-x)Pb(B_(1/2)B'_(1/2))O_(3-x)PbTiO_(3)solid solutions,the long range polar order increases as the PbTiO_(3)content ***,a central peak owing to dynamic PNRs still remains even for the composition near the MPB,and a critical slowing down is clearly observed in the vicinity of TC.

关键词： Ferroelectric relaxor elastic anomaly central peak Brillouin scattering