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Investigating the coagulation of non-proteinaceous algal organic matter: Optimizing coagulation performance and identification of removal mechanisms

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Journal of Environmental Sciences 2019年第5期31卷 25-34页

作者： jana Naceradska Katerina novotna Lenka Cermakova Tomas Cajthaml Martin Pivokonsky Institute of Hydrodynamics of the Czech Academy of Sciences Institute of Microbiology of the Czech Academy of Sciences

The removal of algal organic matter(AOM) is a growing concern for the water treatment industry worldwide. The current study investigates coagulation of non-proteinaceous AOM(AOM after protein separation), which has been minimally explored compared with proteinaceous fractions. Jar tests with either aluminum sulphate(alum) or polyaluminium chloride(PACl) were performed at doses of 0.2–3.0 mg Al per 1 mg of dissolved organic carbon in the p H range 3.0–10.5. Additionally, non-proteinaceous matter was characterized in terms of charge, molecular weight and carbohydrate content to assess the treatability of its different fractions. Results showed that only up to 25% of non-proteinaceous AOM can be removed by coagulation under optimized conditions. The optimal coagulation p H(6.6–8.0 for alum and 7.5–9.0 for PACl) and low surface charge of the removed fraction indicated that the prevailing coagulation mechanism was adsorption of non-proteinaceous matter onto aluminum hydroxide precipitates. The lowest residual Al concentrations were achieved in very narrow p H ranges, especially in the case of PACl. High-molecular weight saccharidelike organics were amenable to coagulation compared to low-molecular weight(< 3 k Da)substances. Their high content in non-proteinaceous matter(about 67%) was the reason for its low removal. Comparison with our previous studies implies that proteinaceous and nonproteinaceous matter is coagulated under different conditions due to the employment of diverse coagulation mechanisms. The study suggests that further research should focus on the removal of low-molecular weight AOM, reluctant to coagulate, with other treatment processes to minimize its detrimental effect on water safety.

关键词： Algal organic matter Chlorella vulgaris Coagulation Flocculation Non-proteinaceous matter Water treatment

Aspect based sentiment analysis using multi-criteria decision-making and deep learning under COVID-19 pandemic in India

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CAAI Transactions on Intelligence Technology 2023年第1期8卷 219-234页

作者： Rakesh Dutta Nilanjana Das Mukta Majumder Biswapati jana Department of Computer Science and Application Hijli CollegeKharagpurIndia WBSEDCL Midnapore ZoneMidnaporeWest BengalIndia Department of Computer Science and Application University of North BengalSiliguriIndia Department of Computer Science Vidyasagar UniversityMidnaporeWest BengalIndia

The COVID-19 pandemic has a significant impact on the global economy and *** the pandemic continues to cause casualties in millions,many countries have gone under *** this period,people have to stay within walls and become more addicted towards social *** express their emotions and sympathy via these online ***,popular social media(Twitter and Facebook)have become rich sources of information for Opinion Mining and Sentiment Analysis on COVID-19-related *** have used Aspect Based Sentiment Analysis to anticipate the polarity of public opinion underlying different aspects from Twitter during lockdown and stepwise unlock *** goal of this study is to find the feelings of Indians about the lockdown initiative taken by the Government of India to stop the spread of ***-specific COVID-19 tweets have been annotated,for analysing the sentiment of common *** classify the Twitter data set a deep learning model has been proposed which has achieved accuracies of 82.35%for Lockdown and 83.33%for Unlock data *** suggested method outperforms many of the contemporary approaches(long shortterm memory,Bi-directional long short-term memory,Gated Recurrent Unit etc.).This study highlights the public sentiment on lockdown and stepwise unlocks,imposed by the Indian Government on various aspects during the Corona outburst.

关键词： aspect based sentiment analysis bi-directional gated recurrent unit COVID-19 deep learning k-means clustering multi-criteria decision-making natural language processing

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露天采矿形成的人工湖中的水鸟建群(英文)

动物学报 2008年第4期54卷 602-614页

作者： Josef RAJCHARD Vít FRIDRICHOVSKY Olga KRIVkov jana NAVRTILOV University of South Bohemia Faculty of Agriculture Department of Biological Disciplines University of South Bohemia Faculty of Agriculture Department of Agroecology Academy of Sciences Institute of Botany Department of Plant Ecology

1999-2003年,在捷克共和国特布盆地生物圈保护区(Tebo Basin Biosphere Reserve)内,我们对13个采矿后形成的人工湖中水鸟群落的形成过程进行了研究。我们假定生活在邻近鱼塘中的水鸟会逐渐向这些人工湖迁移和聚集。在这些人工湖中共记录... 详细信息

1999-2003年,在捷克共和国特布盆地生物圈保护区(Tebo Basin Biosphere Reserve)内,我们对13个采矿后形成的人工湖中水鸟群落的形成过程进行了研究。我们假定生活在邻近鱼塘中的水鸟会逐渐向这些人工湖迁移和聚集。在这些人工湖中共记录到42种水鸟,隶属于10个目,其中17种典型的海滨鸟类是该群落的重要组成部分。这些水鸟的季节动态过程与各物种自身的生活史阶段有关(如筑巢、迁徙),同时也被人类的采矿活动所影响。环境因素和人类干扰影响了绿头鸭(Anas platyrhynchos)、疣鼻天鹅(Cygnus olor)和凤头(Podiceps cristatus)等优势种的分布。沙坑湖作为一种独特的生境为本保护区的濒危物种提供了栖息地,如:小苇(Ixobrychus minutus)、大苇莺(Acrocephalus arundinaceus)及其它潜在分布的鸟类。对南波西米亚地区沙坑湖鸟类的研究,可为其它相似地区水鸟群落演替研究提供了重要经验。

关键词：水鸟沙坑湖分布筑巢

Evolution of landscape in a piedmont section of Eastern Himalayan foothills along India-Bhutan border: A tectono-geomorphic perspective

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Journal of Mountain Science 2019年第12期16卷 2828-2843页

作者： Chandreyee CHAKRABARTI GOSWAMI Prasun jana John C WEBER Department of Geology University of Calcutta35Ballygunge Circular RoadKolkata 700029India Geological Survey of India Northern RegionSector ELucknow 226024India Department of Geology Grand Valley State University1 Campus DriveAllendaleMI 49401 USA

The present study area involves part of a deformed coalesced fan located along the Himalayan Frontal Thrust(HFT)on the east of river Tista near the India-Bhutan *** area is marked by two spectacular E-W trending south-sloping scarps namely the Matiali(ca.60 m)and Chalsa(ca.90 m)Scarps and a north-sloping E-W trending Thaljhora(ca.80 m)*** work comprises of a comparative study of geomorphology and geologic history in the adjacent interfluves of Jaldhaka-Gathia and Neora-Murti rivers to understand the tectonic history of the *** mapped the Jaldhaka-Gathia river interfluve at a 1:25,000 scale and report a hitherto unidentified northerly sloping small scarp of ca.5 m height named the Nagrakata *** scarp was identified using satellite images,DEMs,and total station *** interpret that the two northsloping,E-W trending scarps(Thaljhora and Nagrakata Scarps)are manifestations of steep limbs of anticlines over blind south-dipping back *** they form a wrinkle-ridge pair behind the north-dipping HFT,which is manifested by south-sloping Chalsa *** propose a plausible geomorphic model interpreting that deformation along the small fan in the Jaldhaka-Gathia interfluves is younger compared to fan deposition and deformation in the adjacent Mal-Murti *** most recent geomorphology of the Jaldhaka-Gathia interfluve is controlled by tectonism associated with the thrust below the Nagrakata Scarp where the youngest deformation episode is recorded to at around^6 ka and is likely related to motion on a splay off of the thrust beneath the Thaljhora Scarp.

关键词： Eastern Himalayas Thaljhora Scarp Nagrakata Scarp Drainage Back-thrust Wrinkle-ridge

Carbon Supply and the Regulation of Cell Wa Synthesis

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Molecular Plant 2018年第1期11卷 75-94页

作者： jana Verbancic John Edward Lunn Mark Stitt Staffan Persson Max Planck Institute of Molecular Plant Physiology Am Muhlenberg 1 14476 Potsdam-Golm Germany School of Biosciences University of Melbourne Parkville VIC 3010 Australia

All plant cells are surrounded by a cell wall that determines the directionality of cell growth and protects the cell against its environment. Plant cell walls are comprised primarily of polysaccharides and represent the largest sink for photosynthetically fixed carbon, both for individual plants and in the terrestrial biosphere as a whole. Cell wall synthesis is a highly sophisticated process, involving multiple enzymes and metabolic intermediates, intracellular trafficking of proteins and cell wall precursors, assembly of cell wall polymers into the extracellular matrix, remodeling of polymers and their interactions, and recycling of cell wall sugars. In this review we discuss how newly fixed carbon, in the form of UDP-glucose and other nucleotide sugars, contributes to the synthesis of cell wall polysaccharides, and how cell wall synthesis is influenced by the carbon status of the plant, with a focus on the model species Arabidopsis （Arabidopsis thaliana）.

关键词： carbon availability cell walls nucleotide sugars sucrose synthase

Recent advances in alginate based gastroretentive technologies for drug delivery applications

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Medicine in novel Technology and Devices 2023年第2期18卷 43-54页

作者： Olivia Sen Sreejan Manna Gouranga Nandi Subrata jana Sougata jana Department of Pharmaceutical Technology Brainware UniversityBarasatKolkataWest Bengal700125India Division of Pharmaceutics Department of Pharmaceutical TechnologyUniversity of North BengalRaja RammohunpurDist.–DarjeelingWest BengalPin–734013India Department of Chemistry Indira Gandhi National Tribal UniversityAmarkantakMadhya Pradesh484887India Department of Pharmaceutics Gupta College of Technological SciencesAshram MoreG.T.RoadAsansol713301West BengalIndia Department of Health and Family Welfare Directorate of Health ServicesKolkataIndia

The efficacy of orally delivered medicines can be maximized through enhancing the gastric residence period and modifying the drug release pattern according to therapeutic *** technologies were investigated through recent years for increasing gastric retention of *** are one of the widely studied materials for increasing the retention of drug delivery systems in the stomach *** biodegradability,biocompatibility and non-toxic behavior in combination with the easy fabrication technologies has made biopolymers an interesting option to pharmaceutical scientists for developing gastroretentive drug delivery systems(GRDDS).Several gastroretentive approaches are reported to be efficacious to localize the drug delivery system in the gastric *** are commonly employed polysaccharide for developing various GRDDS including low density systems,mucoadhesive systems,swellable systems,hydrogel forming systems,in situ gelling systems,raft forming systems,magnetic *** abundant availability from marine and bacterial sources in combination with its attractive physicochemical nature has encouraged pharmaceutical researchers to investigate its suitability in developing various drug delivery *** mucoadhesive,hydrogel forming and raft forming behavior of alginates makes alginate suitable for *** attractive properties of alginate makes it a useful biopolymer in the biomedical *** review focuses on the source and chemistry of alginates and describes the applications of alginates in developing novel gastroretentive drug delivery systems.

关键词： Gastroretentive drug delivery system Alginate Low density systems Mucoadhesive systems Hydrogel forming system Drug delivery applications

Magnetic labeling of primary murine monocytes using very small superparamagnetic iron oxide nanoparticles

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Neural Regeneration Research 2022年第10期17卷 2311-2315页

作者： Martin Pohland Christoph Pohland Jürgen Kiwit jana Glumm Institute of Cell Biology and Neurobiology Center for AnatomyCharité-Universitätsmedizin BerlinBerlinGermany Department of Neurosurgery Helios Klinikum Berlin BuchBerlinGermany

Due to their very small size,nanoparticles can interact with all cells in the central nervous *** of the most promising nanoparticle subgroups are very small superparamagnetic iron oxide nanoparticles(VSOP)that are citrate coated for electrostatic *** determine their influence on murine blood-derived monocytes,which easily enter the injured central nervous system,we applied VSOP and carboxydextran-coated superparamagnetic iron oxide nanoparticles(Resovist).We assessed their impact on the viability,cytokine,and chemokine secretion,as well as iron uptake of murine blood-derived *** found that(1)the monocytes accumulated VSOP and Resovist,(2)this uptake seemed to be nanoparticle-and time-dependent,(3)the decrease of monocytes viability was treatment-related,(4)VSOP and Resovist incubation did not alter cytokine homeostasis,and(5)overall a 6-hour treatment with 0.75 mM VSOP-R1 was probably sufficient to effectively label monocytes for future *** homeostasis is not altered,it is safe to label blood-derived monocles with *** labeled monocytes can be used to study injured central nervous system sites further,for example with drug-carrying VSOP.

关键词： CD11b,cytokine Ferucarbotran Mac1 MPS MRI Resovist superparamagnetic iron oxide nanoparticles(SPIO) very small superparamagnetic iron oxide nanoparticles(VSOP) viability

From Humanized Nature to Naturalized Humans-Li Zehou＇s Transformation of the Classical Chinese “Tianren Heyi” Paradigm Through the Lens of Kant and Eady Marx

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Frontiers of Philosophy in China 2018年第1期13卷 72-90页

作者： jana S. Rosker Department of Asian Studies Faculty of Humanities University of Ljubljana Ljubljana 1260 Slovenia

Li Zehou belongs among the ranks of the most important Chinese philosophers of the 20th and 21st centuries. In his complex theoretical system, he aimed to reconcile the Chinese cultural heritage with the demands of the contemporary world. Besides elaborating on traditional Chinese philosophy, Li launched many innovative views based on his understanding of specific developments in pre-modern and modern Western philosophy. His philosophy could be described as the search for a synthesis between Western and traditional Chinese thought and a specifically Chinese modernization. In order to provide a basic insight into Li＇s specific methods of combining Kant, early Marx and classical Chinese philosophy, the present article investigates his elaboration of the traditional Chinese paradigm of “the unity of nature and man” （tianren heyi 天人合一） through the lens of ideas about humanized nature （renhua de ziran ）人化的自然） and naturalized humans （ziranhua de ten 自然化的人）.

关键词： Li Zehou naturalization of humans humanization of nature subjectality Kant Marx

Electron transfer dynamics in Schottky junction photocatalyst during electron donor-assisted hydrogen production

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Journal of Materials Science & Technology 2023年第28期159卷 1-9页

作者： Jianjun Zhang Jingjing Liu Zheng Meng Sanjib jana Linxi Wang Bicheng Zhu Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of Geosciences68 Jincheng StreetWuhan 430078China School of Chemistry Chemical Engineering and BiotechnologyNanyang Technological University21 Nanyang LinkSingapore 637371Singapore Jiangxi Key Laboratory of Surface Engineering Jiangxi Science and Technology Normal UniversityNanchang 330038China

Electron donors(EDs)are widely used to improve the H 2 production performance of Schottky junction photocatalysts,but the functions of EDs are still unknown from the perspective of electron transfer ***,Pt nanocluster-decorated CdS nanorod is successfully prepared to construct a typical CdS/Pt Schottky *** nanoclusters with a diameter of∼2 nm are deposited on the surface of CdS nanorods by in situ photoreduction at sub-zero *** CdS/Pt photocatalyst using lactic acid shows a higher H_(2)production rate of 4762μmol g^(-1)h^(-1)compared to that using methanol,tri-ethanolamine,and *** understand the cause,the dynamics of photogenerated carriers in CdS/Pt photocatalysts during ED-assisted H_(2)production are revealed by femtosecond transient absorption *** the four organic EDs,lactic acid enables the fastest electron transfer rate of 1.8×10^(9)s^(-1)and the highest electron transfer efficiency of 76%at the CdS/Pt interface due to the most efficient hole *** work sheds light on the importance of efficient interfacial electron transfer for im-proving the photocatalytic performance of Schottky junction photocatalysts.

关键词： Transient absorption spectroscopy Interfacial electron transfer Electron transfer rate Electron transfer efficiency Hole consumption