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In situ stabilization of arsenic in soil with organoclay,organozeolite,birnessite,goethite and lanthanum-doped magnetic biochar

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Pedosphere 2022年第5期32卷 764-776页

作者： Saeed BAGHERIFAm Trevor C.BROWN Christopher m.FELLOWS Ravi naidu Sridhar KOmARNENI Chemistry-School of Science and Technology University of New EnglandArmidale NSW 2351(Australia) Global Centre for Environmental Remediation Faculty of Science and Information TechnologyUniversity of NewcastleUniversity DriveCallaghan NSW 2308(Australia) Department of Ecosystem Science and management and materials Research Institute 204 Energy and the Environment LaboratoryPennsylvania State UniversityUniversity Park PA 16802(USA)

Arsenic(As)is a known carcinogen and naturally occurring semi-metal in soils and in the Earth's *** of soils and water with As poses a serious threat to millions of people worldwide due to its health hazards and toxicological ***,devising novel and efficient methods for remediation of contaminated areas has attracted a great deal of interest across the *** this study,we investigated the usefulness of synthetic birnessite,goethite,hexadecylpyridinium chloride-modified montmorillonite(HDPC-m),hexadecylpyridinium bromide-modified zeolite(HDPB-Z),and lanthanum(La)-doped magnetic biochar produced from eucalyptus bark(La-Euchar)as adsorbents at 10%dosage for As stabilization in a soil spiked with 1000 mg kg^(-1)*** effectiveness of the above adsorbents in As immobilization in soil was assessed using single-step extractions with 2 mol L^(-1)HNO_(3)and deionized water,the simplified bioaccessibility extraction test(SBET)method,and sequential extraction with the modified Community Bureau of Reference(BCR)*** of the adsorbents shifted the exchangeable fraction of As to more recalcitrant fractions and dramatically reduced the exchangeable fraction by 6%-99%and the extractable amounts with HNO_(3),deionized water,and SBET method by 30%-92%,17%-95%,and 12%-90%,respectively,compared to the unamended *** immobilizing effects of adsorbents on As decreased in the sequence of birnessite>La-Euchar>goethite>HDPB-Z>*** exhibited great affinity for As and drastically reduced As extractability by more than 90%in all single *** results revealed that HDPC-m,HDPB-Z,La-Euchar,birnessite,and goethite are promising immobilizing agents for in situ stabilization of As in terrestrial environments.

关键词： adsorbent bioaccessibility bioavailability environmental contamination immobilizing agent modified biochar modified clay remediation technique

Identification of commonly regulated protein targets and molecular pathways in PC-3 and DU145 androgen-independent human prostate cancer cells treated with the curcumin analogue 1,5-bis(2-hydroxyphenyl)-1,4-pentadiene-3-one

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Asian Pacific Journal of Tropical Biomedicine 2018年第9期8卷 436-445页

作者： Kamini Citalingam Faridah Abas Nordin H.Lajis Iekhsan Othman Rakesh naidu Jeffery Cheah School of medicine and Health Sciences Monash University Malaysia Jalan Lagoon Selatan Laboratory of Natural Products Faculty of Science Universiti Putra Malaysia Department of Food Science Faculty of Food Science and Technology Universiti Putra Malaysia

Objective: To identify mutually regulated proteins in PC-3 and DU145 androgen-independent prostate cancer cell lines treated with 1,5-bis(2-hydroxyphenyl)-1,4-pentadiene-3-one(mS17), and to study the molecular pathways that contributed to the anticancer activity of ***: PC-3 and DU145 cells were treated with 3 × EC_(50)(15 μm) concentration of mS17 for 24 h and were subjected to protein expression profiling using two-dimensional gel electrophoresis and protein identification by mass *** differentially expressed proteins with significant P-value of Pmmon protein targets of ***: Profiling data revealed that, the mutually down-regulated proteins included ACTB and ACTG associated with structural molecule activity, ACTN1 with cell cycle, ACTN4 with cell migration, HNRPK with apoptosis, PLST with morphogenesis and TERA with ***, the expressions of CH60 and HS71 A respectively associated with response to unfolded protein demonstrated opposing regulation in PC-3 and DU145 *** analysis of the differentially expressed proteins in PC-3 cells demonstrated the modulation of top pathways associated with cell-cell adhesion and cytoskeletal organization while in DU145 cells the pathways were associated with proteosomal degradation, regulation of electrolytes and water, regulation control of germ cells and organization of filament assembly/***: The findings of the present study provide an understanding on the anti-tumorigenic activity of mS17 at the proteome level and warrant further research for its potential application for the management and treatment of androgen-independent prostate cancer.

关键词： Androgen-independent prostate cancer Diarylpentanoid Proteomics profiling mass spectrometry Pathway analysis

Early warning system for shallow landslides using rainfall threshold and slope stability analysis

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Geoscience Frontiers 2018年第6期9卷 1871-1882页

作者： Shruti naidu K.S.Sajinkumar Thomas Oommen V.J.Anuja Rinu A.Samuel C.muraleedharan Department of Earth Sciences Pondicherry UniversityPondicherry 605 014India Department of Geology University of KeralaThiruvananthapuram 695 581KeralaIndia Department of Geological&mining Engineering&Sciences Michigan Technological University1400 Townsend DriveHoughtonMI 49931USA Department of Civil Engineering University of TexasArlingtonTX 76019USA Geological Survey of India Thiruvananthapuram 695 013KeralaIndia

A combined cluster and regression analysis were performed for the first time to identify rainfall threshold that triggers landslide events in Amboori, Kerala, India. Amboori is a tropical area that is highly vulnerable to landslides. The 2, 3, and 5-day antecedent rainfall data versus daily rainfall was clustered to identify a cluster of critical events that could potentially trigger landslides. Further, the cluster of critical events was utilized for regression analysis to develop the threshold equations. The 5-day antecedent(xvariable) vs. daily rainfall(y-variable) provided the best fit to the data with a threshold equation of y = 80.7-0.1981 x. The intercept of the equation indicates that if the 5-day antecedent rainfall is zero, the minimum daily rainfall needed to trigger the landslide in the Amboori region would be 80.7 mm. The negative coefficient of the antecedent rainfall indicates that when the cumulative antecedent rainfall increases, the amount of daily rainfall required to trigger monsoon landslide decreases. The coefficient value indicates that the contribution of the 5-day antecedent rainfall is～20% to the landslide trigger threshold. The slope stability analysis carried out for the area, using Probabilistic Infinite Slope Analysis model(PISA-m), was utilized to identify the areas vulnerable to landslide in the region. The locations in the area where past landslides have occurred demonstrate lower Factors of Safety(FS) in the slope stability analysis. Thus, rainfall threshold analysis together with the FS values from slope stability can be suitable for developing a simple, cost-effective, and comprehensive early-warning system for shallow landslides in Amboori and similar regions.

关键词： Landslide Cluster analysis Rainfall threshold analysis Factor of safety Slope stability analysis PISA-m

Energy Aware Clustered Based multipath Routing in mobile Ad Hoc Networks

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International Journal of Communications, Network and System Sciences 2009年第2期2卷 123-130页

作者： m. BHEEmALINGAIAH m. m. naidu D. Sreenivasa RAO Dept. of Computer Science and Engineering J.N.T University Hyderabad India Dept. of Computer Science and Engineering S.V.U College of Engineering Tirupati India Dept. of Electronics and Communication Engineering J.N.T University Hyderabad India

With the advance of wireless communication technologies, small-size and high-performance computing and communication devices are increasingly used in daily life. After the success of second generation mobile system, more interest was started in wireless communications. A mobile Ad hoc Network (mANET) is a wireless network without any fixed infrastructure or centralized control;it contains mobile nodes that are connected dynamically in an arbitrary manner. The mobile Ad hoc Networks are essentially suitable when infrastructure is not present or difficult or costly to setup or when network setup is to be done quickly within a short period, they are very attractive for tactical communication in the military and rescue missions. They are also expected to play an important role in the civilian for as convention centers, conferences, and elec-tronic classrooms. The clustering is an important research area in mobile ad hoc networks because it im-proves the performance of flexibility and scalability when network size is huge with high mobility. All mo-bile nodes operate on battery power;hence, the power consumption becomes an important issue in mobile Ad hoc Network. In this article we proposed an Energy Aware Clustered-Based multipath Routing (EACmR), which forms several clusters, finds energy aware node-disjoint multiple routes from a source to destination and increases the network life time by using optimal routes.

关键词： Clustering CONID mANET mutlipath AODVm

The Stimulatory Effects of the Antimicrobial Agents Bavistin, Cefotaxime and Kanamycin on <i>In Vitro</i>Plant Regeneration of <i>Centella asiatica</i>(L.)—An Important Antijaundice medicinal Plant

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American Journal of Plant Sciences 2014年第3期5卷 279-285页

作者： Chandra Sekhar Panathula manikyam Doraiswamy naidu mahadev Challagundla Varadarajulu naidu Department of Biotechnology Dravidian University Kuppam India

Antimicrobial agents such as bavistin, cefotaxime and kanamycin were evaluated for their effects on the rapid shoot regeneration from nodal explants of Centella asiatica (L.). Filter sterilized bavistin (250 mg/L) was augmented alone and in combination with cytokinins such as BAP and TDZ into the media to trace the effect on regeneration. On this basis, the potential use of bavistin (150 mg/L) along with BAP (2.0 mg/L) was evaluated which showed the maximum shoot number (6.6) and shoot length (4.4 cm) respectively. Cefotaxime at the concentration of 100 μm/L was found to be effective to obtain the maximum shoot number formation (5.8) with the regeneration frequency (90%). Kanamycin at the concentration of 80 μm/L induced maximum shoot regeneration (5.12). Kanamycin at 100 μm/L or at higher concentrations reduced the shoot regeneration. The best rooting response was noticed when in vitro regenerated microshoots were transferred to the rooting medim which was supplemented with IBA (2.0 mg/L). This combination generates 90% of regeneration frequency and maximum number of roots per shoot (14.2) and high root length (4.2 cm). The rooted plants were acclimatized and transferred to field for survivalance. The addition of antibiotics was found to be more effective and safer for using since their effects on regeneration were found to be negligible.

关键词： Centella asiatica (L.) Bavistin Cefotaxime Kanamycin 6-Benzyl Amino Purine In Vitro Regeneration

Antioxidant and hepatoprotective effects of Boswellia ovalifoliolata bark extracts

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Chinese Journal of Natural medicines 2014年第9期12卷 663-671页

作者： Bandari Uma mahesh Shweta Shrivastava Rajeswara Rao Pragada V.G.m.naidu Ramakrishna Sistla Department of Pharmacology A.U.College of Pharmaceutical Sciences Andhra University Vishakhapatnam Andhra Pradesh India -530003 Department of Pharmacology & Toxicology National Institute of Pharmaceutical Education & Research (NIPER-Hyderabad) Balanagar Hyderabad Andhra Pradesh India-500037 Pharmacology Division Indian Institute of Chemical Technology Habsiguda Hyderabad Andhra Pradesh ndia-500007

Paracetamol(PCm) hepatotoxicity is related to reactive oxygen species(ROS) formation and excessive oxidative stress; natural antioxidant compounds have been tested as an alternative therapy. This study evaluated the hepatoprotective activity of an alcoholic extract of Boswellia ovalifoliolata(BO) bark against PCm-induced hepatotoxicity. BO extract also demonstrated antioxidant activity in vitro, as well as scavenger activity against 2, 2-diphenyl-1-picrylhydrazyl. Administration of PCm caused a significant increase in the release of transaminases, alkaline phosphatase, and lactate dehydrogenase in serum. Significant enhancement in hepatic lipid peroxidation and marked depletion in reduced glutathione were observed after parac intoxication with severe alterations in liver histology. BO treatment was able to mitigate hepatic damage induced by acute intoxication of PCm and showed a pronounced protective effect against lipid peroxidation, deviated serum enzymatic variables, and maintained glutathione status toward control. The results clearly demonstrate the hepatoprotective effect of BO against the toxicity induced by PCm.

关键词： extracts peroxidation glutathione dehydrogenase protective alcoholic antioxidant ABTS histology curcumin

Geo-Spatial Database Creation for Wazirabad Canal Command Area

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Journal of Geographic Information System 2011年第4期3卷 290-297页

作者： Chalumuri Ramesh naidu m. V. S. S. Giridhar 不详

GIS assist in specific planning and decision-making processes in irrigation through the input, spatial analysis and output of relevant information. The real strength of GIS is its ability to integrate information. This integration power makes the scope of GIS almost infinite. The unique integration capability of GIS allows disparate data sets to be brought together to create a complete picture of a situation. GIS technology illustrates relationships, patterns and connections that are not necessarily obvious in any one data set but are amazingly apparent once the data sets are integrated. GIS also helps us to assess the performance of the irrigation command areas. GIS based system helps a canal to analyze the spatial information about its engineers and farmers to improve planning, management and supply of water resources to its corresponding blocks. In order to manage the water efficiently in the command area, it is needless to say that calculation and evaluation of water demands in detail at block and minor level to be given overriding priority. Blocks and Chak boundaries can be delineated from the Digital Elevation model using GIS techniques. These boundaries will help to plan and allocate the water resources to improve the water allocation strategies and in turn water use efficiency and can make inter-canal comparisons. The delineated block boundaries can be refined exactly using the drainage, topography and existing canal network in GIS platform.

关键词： GIS Command Area Block Chak

Irrigation Demand VS Supply-Remote Sensing and GIS Approach

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Journal of Geoscience and Environment Protection 2016年第1期4卷 43-49页

作者： Ch. Ramesh naidu m. V. S. S. Giridhar GVP College of Engineering (Autonomous) Visakhapatnam India Jawaharlal Nehru Technological University Hyderabad India

To determine the irrigation requirements of rice crop on different soils, an integrated approach is used using Remote Sensing and GIS techniques. Depending on the type of soil, climate and the crop acreage, the water requirement for paddy fields is derived. This study is focused on estimating the water demand for rice crop in Rabi season. Crop evapo-transpiration and soil percolation losses account more in rice fields especially in hot climate like Rabi season. In addition to evapo-transpiration and percolation losses, the conveyance losses are also accountable in the case of unlined canals. Satellite data is used to estimate the rice and fallow lands. In conjunction to satellite interpreted data, climate and soil data are also integrated in GIS platform. CROPWAT model is used to determine the crop evapo-transpiration (ETc). There are 11 Water User’s Associations (WUA) in the command area and under which 13 canal blocks are delineated. These blocks are again delineated in to 212 sub blocks. This study indicates that there exists a 5% to 20% of water deficiency in some WUAs and also water surplus in some WUAs varying from 15% to 40%.

关键词： GIS Water Users Association Evapo-Transpiration Remote Sensing Irrigation

managing High Volume Data for Network Attack Detection Using Real-Time Flow Filtering

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China Communications 2013年第3期10卷 56-66页

作者： Abhrajit Ghosh Yitzchak m. Gottlieb Aditya naidu Akshay Vashist Alexander Poylisher Ayumu Kubota Yukiko Sawaya Akira Yamada Applied Communication Sciences 150 Mount Airy RoadBasking Ridge NJ 07920 USA KDDI R&D Laboratories 2-1-15 Ohara Fujimino-shiSaitama 356-8502 Japan

In this paper, we present Real-Time Flow Filter (RTFF) -a system that adopts a middle ground between coarse-grained volume anomaly detection and deep packet inspection. RTFF was designed with the goal of scaling to high volume data feeds that are common in large Tier-1 ISP networks and providing rich, timely information on observed attacks. It is a software solution that is designed to run on off-the-shelf hardware platforms and incorporates a scalable data processing architecture along with lightweight analysis algorithms that make it suitable for deployment in large networks. RTFF also makes use of state of the art machine learning algorithms to construct attack models that can be used to detect as well as predict attacks.

关键词： network security intrusion detection scaling