检索结果-南通市图书馆

Efficiency Analysis of Promotion of Chinese Tea on Russian Market

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Efficiency Analysis of Promotion of Chinese Tea on Russian M...

作者： Lyssenko valentina（白龙）南昌大学

学位级别：硕士

It is top-important for each company that sells Chinese tea to use promotion tools in the best possible way to achieve increase of *** will influence increase of purchase tea from *** purpose of this research work is to analyze efficiency of different promotion mix tools of marketing that influence sales of Chinese tea-based trademark “Inspiration” on local Russian *** the literature overview concept of “promotion” was analyzed and the main objectives of the promotion activity were defined,the communication process that connects the sender and the recipient of the marketing message was also *** functions of the promotion mix,as well as its structure,were *** on the analysis of the literature,it was concluded that there are several points of view on the structure of the promotion ***,there are four elements of the promotion mix: advertising,sales promotion,PR,personal *** of lirerature helped to develop extended promotion mix concept which includes the following elements: advertising,sales promotion,personal selling,PR,direct marketing,sponsorship,product placement,branding,exhibitions and fairs,corporate identity,packaging,information *** describing the generalized structure of the promotion mix,elements were selected to analyze their efficiency in *** the methodology systematization,generalization and classification of existing methods for evaluating the efficiency of promotion mix elements were *** basic concepts of efficiency were *** was determined what place the evaluation of the efficiency of the promotion in the overall sequence of evaluation of the marketing activities of the *** main directions for evaluating the efficiency were also outlined: an analysis of the costefficiency of campaigns,an assessment of communicative efficiency,an analysis of information efficiency,an assessment of the channels of information dissemination,an assessment of the quali

关键词：

100 years of high GEM concentration in the Central Italian Herbarium and Tropical Herbarium Studies Centre(Florence,Italy)

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2020年第1期32卷 377-388页

作者： Jacopo Cabassi valentina Rimondi Zhang Yeqing Antonella Vacca Orlando Vaselli Antonella Buccianti Pilario Costagliola Department of Earth Sciences University of FlorenceVia G.La Pira4-50121 FlorenceItaly CNR-Institute of Geosciences and Earth Resources Via G.La Pira4-50121 FlorenceItaly

Up to 1980 s,the most used preservative for herbaria specimens was HgCl2,sublimating at ambient air conditions;ionic Hg then reduces to Hg0(gaseous elemental mercury,GEM)and diffuses throughout poor ventilated *** GEM levels may indeed persist for decades,representing a health *** this study,we present new GEM data from the Central Italian Herbarium and Tropical Herbarium Studies Centre of the University of Florence(Italy).These herbaria host one of the largest collection of plants in the ***,HgCl2 was documented as plant preservative up to the 1920 *** surveys were conducted in July 2013 and July and December 2017,to account for temporal and seasonal *** show GEM concentrations well above those of external locations,with peak levels within specimen storage cabinets,exceeding 50,000 ng/*** concentrations up to^7800 ng/m3 were observed where the most ancient collections are stored and no ventilation systems were *** the contrary,lower GEM concentrations were observed at the first ***,lower and more homogeneously distributed GEM concentrations were measured in 2017 than in 2013 since the air-conditioning system was updated in *** concentrations were similar to other herbaria worldwide and lower than Italian permissible exposure limit of 20,000 ng/m3(8-hr working day).Our results indicate that after a century from the latest HgCl2 treatment GEM concentrations are still high,i.e.,the treatment itself is almost *** conditioning and renewing is probably the less expensive and more effective method for GEM lowering.

关键词： Gaseous elemental mercury(GEM) Mercuric chloride Herbaria Florence Health safety

Unveiling the detection dynamics of semiconductor nanowire photodetectors by terahertz near-field nanoscopy

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2020年第1期9卷 184-195页

作者： Eva A.A.Pogna Mahdi Asgari valentina Zannier Lucia Sorba Leonardo Viti Miriam S.Vitiello NEST CNR-Istituto Nanoscienze and Scuola Normale SuperiorePiazza San Silvestro 1256127 PisaItaly

Semiconductor nanowire field-effect transistors represent a promising platform for the development of roomtemperature(RT)terahertz(THz)frequency light detectors due to the strong nonlinearity of their transfer characteristics and their remarkable combination of low noise-equivalent powers(100 V/W).Nano-engineering an NW photodetector combining high sensitivity with high speed(subns)in the THz regime at RT is highly desirable for many frontier applications in quantum optics and nanophotonics,but this requires a clear understanding of the origin of the *** electrical and optical measurements,however,cannot unambiguously determine the dominant detection mechanism due to inherent device asymmetry that allows different processes to be simultaneously ***,we innovatively capture snapshots of the photo-response of individual InAs nanowires via high spatial resolution(35 nm)THz photocurrent *** coupling a THz quantum cascade laser to scattering-type scanning near-field optical microscopy(s-SNOM)and monitoring both electrical and optical readouts,we simultaneously measure transport and scattering *** spatially resolved electric response provides unambiguous signatures of photo-thermoelectric and bolometric currents whose interplay is discussed as a function of photon density and material doping,therefore providing a route to engineer photo-responses by design.

关键词： scattering quantum frontier

Early Miocene flora of central Kazakhstan(Turgai Plateau) and its paleoenvironmental implications

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plant Diversity 2019年第3期41卷 183-197页

作者： Popova Svetlana Utescher Torsten Averyanova Anna Tarasevich valentina Tropina Polina Xing Yaowu Komarov Botanical Institute of RAS Palaeobotanical Department 2 Professor Popov Str. Saint Petersburg 197376 Russia Steinmann Institute Bonn University Nussallee 8 Bonn D-53115 Germany Senckenberg Research Institute and Natural History Museum/Biodiversity and Climate Research Centre Senckenberganlage 25 Frankfurt D-60325 Germany Xishuangbanna Tropical Botanical Garden of Chinese Academy of Sciences (CAS) Menglum Mengla Yunnan 666303 China

The investigation of the fossil floras from the Turgai plateau (central Kazakhstan) contributes to a better understanding of the origin of the temperate Turgai type flora which spread to Kazakhstan and adjacent areas during the Oligocene-Miocene transition. In this paper, we present the results of a carpological and palynological study of the Kumyrtas flora collected from a flora-bearing horizon of the regional coalbearing Zhilanchik suite, dated to the Aquitanian period. Pollen analysis identified 33 taxa, with are dominated by angiosperms (about 73%) and reflect zonal vegetation. The high percentages of Betula (27%) and Pterocarya (7.5%) that were found in this flora allows comparisons with other Aquitanian floras of Kazakhstan. Based on descriptions of fossil fruits and seeds, we determined that 19 taxa were dominant;these taxa had meosphytic herbaceous components, suggesting mostly edaphic local conditions. The incongruence between the carpological and the pollen records suggests a significant taphonomical effect. Quantitative reconstruction of the palaeoclimate based on pollen records supports—and slightly extends—previous findings based on fossil leaf data, but contradicts findings deduced from the carpological record. Plant Functional Type (PFT) classification was used to characterize the vegetation patterns. Pollen records show that about 45% of diversity relates to the arboreal broadleaved deciduous components and ca. 35% to conifers. Fossil fruit and seed data indicate riverine vegetation with a high diversity of aquatic components and shrub stratum.

关键词： Kazakhstan Turgai flora Oligocenee-Miocene transition Palaeoclimate reconstruction PFT

Genotoxic Potential of Copper Oxide Nanoparticles in the Bivalve Mollusk Mytilus trossulus

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2017年第2期16卷 339-345页

作者： Victor P.Chelomin valentina V.Slobodskova Maksim Zakhartsev Sergey Kukla Laboratory of Marine Ecotoxicology V.I.Ilichev Pacific Oceanological Institute of the Far East Branch of Russian Academy of SciencesVladivostok 600041Russia The Far Eastern Federal University School of Natural SciencesVladivostok 600091Russia University of Hohenheim Stuttgart 70599Germany

Copper oxide nanoparticles(CuO-NPs) are among the most widely used metal oxide nanoparticles,which increases the chance of their being released into the marine *** the applications of these particles have increased in recent years,their potential impact on the health of marine biota has also ***,the toxicological effects of these NPs in the marine environment are poorly *** the present study,the DNA damaging potential of CuO-NPs in the marine eastern mussel Mytilus trossulus was evaluated and compared to that of dissolved copper *** was assessed by the single cell gel electrophoresis(comet) assay in mussel gill and digestive gland *** results showed that copper in both forms(CuO-NPs and dissolved copper) was accumulated to different extents in mussel *** mussel exposed to the dissolved copper attained higher concentrations of copper in the gills than in the digestive *** contrast to these results,it was found that CuO-NPs could induce much higher copper accumulation in the digestive gland than in the gills.A clear and statistically significant increase in DNA damage was found in both tissues of the Cu-exposed group compared to the control *** results indicated that the CuO-NP exposure produced remarkable effects and increased DNA damage significantly in mussel gill cells *** should be noted that the digestive gland cells were prone to accumulation following CuO-NPs when compared to the gill cells,while the gill cells were more sensitive to the genotoxic effects of *** results also suggested the need for a complete risk assessment of engineered particles before its arrival in the consumer market.

关键词： CuO nanoparticles copper accumulation DNA damage genotoxicity Mytilus trossulus

Designing a SCAR molecular marker for monitoring Trichoderma cf. harzianum in experimental communities

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2014年第11期15卷 966-978页

作者： Gabriel PéREZ valentina VERDEJO Clarissa GONDIM-PORTO Julieta ORLANDO Margarita CARú Department of Ecological Sciences Faculty of SciencesUniversity of Chile

Several species of the fungal genus Trichoderma establish biological interactions with various micro- and macro-organisms. Some of these interactions are relevant in ecological terms and in biotechnological applications, such as biocontrol, where Trichoderma could be considered as an invasive species that colonizes a recipient community. The success of this invasion depends on multiple factors, which can be assayed using experimental communities as study models. Therefore, the aim of this work is to develop a species-specific sequence-characterized amplified region （SCAR） marker to monitor the colonization and growth of T. cf. harzianum when it invades experi- mental communities. For this study, 16 randomly amplified polymorphic DNA （RAPD） primers of 10-mer were used to generate polymorphic patterns, one of which generated a band present only in strains of T. cf. harzianum. This band was cloned, sequenced, and five primers of 20-23 mer were designed. Primer pairs 2F2/2R2 and 2F2/2R3 successfully and specifically amplified fragments of 278 and 448 bp from the T. cf. harzianum BpT10a strain DNA, respectively. Both primer pairs were also tested against the DNA from 14 strains of T. cf. harzianum and several strains of different fungal genera as specificity controls. Only the DNA from the strains of T. cf. hat-zianum was successfully amplified. Moreover, primer pair 2F2/2R2 was assessed by quantitative real-time polymerase chain reaction （PCR） using fungal DNA mixtures and DNA extracted from fungal experimental communities as templates. T. cf. harzianum was detectable even when as few as 100 copies of the SCAR marker were available or even when its population represented only 0.1% of the whole community.

关键词： Tnchoderma cf. harzianum Sequence-characterized amplified region (SCAR) Molecular marker Experimental fungal communities

Contribution of the Earth's gravitational potential to variations in orbital motion of short-period comets

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2016年第4期16卷 1-6页

作者： valentina M.Chepurova Nelli V.Kulikova Elena N.Petrovskaya Sternberg Astronomical Institute Lomonosov Moscow State University Department of Computer Systems Networks and Technologies National Research Nuclear University Moscow Engineering Physics Institute Institute for Nuclear Power Engineering

We present simulation results on evolution development of orbital motion of short-period comets with the revolution period not exceeding 6-7 years, namely comets 21P/Giacobini-Zinner, 26P/Grigg- Skjellerup and 7P/Pons-Winnecke. The calculations cover the range from the date of the object＇s discovery to 2100. Variations in the objects＇ orbital elements under the action of gravity disturbances, taking Earth＇s gravitational potential into account when the small body approaches, are analyzed. Corrected dates of peri- helion passages can be used for scheduling observations.

关键词： comets: individual (21P/Giacobini-Zinner 26P/Grigg-Skjellerup 7P/Pons-Winnecke)-- me-teorites meteors meteoroids

Endarterectomy for symptomatic non-stenotic carotids: a systematic review and descriptive analysis

在线全文

学校读者我要写书评

暂无评论

Stroke & Vascular Neurology 2022年第1期7卷 6-12页

作者： Anthony Larson valentina Nardi Waleed Brinjikji John Benson Giuseppe Lanzino Luis Savastano Department of Radiology Mayo ClinicRochesterMinnesotaUSA Neurosurgery Mayo ClinicRochesterMinnesotaUSA

Objective To systematically analyse prior reports of carotid endarterectomy(CEA)performed in cases of≤50%carotid stenosis in order to understand patient tolerance and potential *** A systematic review and descriptive analysis was performed in concordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses *** English-language search was performed of online databases using librarian-selected search *** were reviewed for relevance which included mention of carotid endarterectomy and *** or retrospective observational cohort studies that reported series of patients who underwent endarterectomy for minimal(≤50%)luminal stenosis with reported outcomes were *** Six studies(which included our institutional series)with a total of 143 patients met the inclusion *** weighted mean age at the time of CEA was 72.3 years;113(79.0%)were male.55.8%of patients with available data had recurrent ipsilateral ischaemic events despite medical *** patients out of 129 with available perioperative data(1.6%)had perioperative MRI findings of acute ischaemic stroke,both within the hemisphere contralateral to the side of *** the 138 patients with available follow-up(mean,36 months),none had recurrent ipsilateral ischaemic *** Endarterectomy for symptomatic carotid disease causing≤50%stenosis may be a potentially beneficial strategy to prevent stroke *** with robust methodology are needed to draw more definitive conclusions in terms of the safety and efficacy of endarterectomy for minimal stenosis with vulnerable features relative to intensive medical therapy.

关键词： carotid stenosis analysis

Modeling individual vocal differences in group-living lemurs using vocal tract morphology

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2017年第4期63卷 467-475页

作者： Marco GAMBA Livio FAVARO Alessandro ARALDI valentina MATTEUCCI Cristina GIACOMA Olivier FRIARD Department of Life Sciences and Systems Biology University of Torino Via Accademia Albertina 13 Torino 10134 Italy Zoom Torine S.p.A Strada Piscina 36 Cumiana (Torino) 10040 Italy

Vocal individuality is widespread in social animals. Individual variation in vocalizations is a prereq- uisite for discriminating among conspecifics and may have facilitated the evolution of large complex societies. Ring-tailed lemurs Lemur catta live in relatively large social groups, have con- spicuous vocal repertoires, and their species-specific utterances can be interpreted in light of source-filter theory of vocal production. Indeed, their utterances allow individual discrimination and even recognition thanks to the resonance frequencies of the vocal tract. The purpose of this study is to determine which distinctive vocal features can be derived from the morphology of the upper vocal tract. To accomplish this, we built computational models derived from anatomical measurements collected on lemur cadavers and compared the results with the spectrographic out- put of vocalizations recorded from ex situ live individuals. Our results demonstrate that the mor- phological variation of the ring-tailed lemur vocal tract explains individual distinctiveness of their species-specific utterances. We also provide further evidence that vocal tract modeling is a power- ful tool for studying the vocal output of non-human primates.

关键词： formants indexical cues Lemur catta nasal resonance ring-tailed lemur.