45,253 research outputs found
From self assembled monolayers to clickable gold nanoparticles
No full textThe aim of the present PhD thesis was the investigation of the behavior of gold nanoparticle stabilizing oligo thioether ligands on gold surfaces and further on to develop a protocol for the directed assembly of mono functionalized gold nanoparticle into defined oligomer structures.
Outline
The present cumulative PhD thesis consists of the following parts:
In the Introduction the research field of gold nanoparticles is presented with to point out their unique electronic and physical properties. The second focus will be on the controlled interlinking and functionalization of gold nanoparticles using click chemistry and their potential applications, which will be submitted as a review article.
Within Concept and Strategy the goals of the research project are introduced and the concepts and outputs of the resulting publications are presented.
The Publications are accumulated with their respective Supporting Information, in the order in which they were prepared:
“Loops versus Stems: Benzylic Sulfide Oligomers Forming Carpet Type Monolayers“ F. Sander, T. Peterle, N. Ballav, F. Wrochem, M. Zharnikov, M. Mayor J. Phys. Chem. C, 2010, 114, 4118 – 4125.
“Add a Third Hook: S-Acetyl Protected Oligophenylene Pyridine Dithiols as Advanced Precursors for Self-Assembled Monolayers“ F. Sander, J. P. Hermes, M. Mayor, H. Hamoudi, M. Zharnikov PCCP, 2013, 15, 2836 – 2846.
“Dumbbells, Trikes and Quads - Click Gold Nanopartricles together“ F. Sander, U. Fluch, J. P. Hermes and M. Mayor Small 2014, 10, 349 – 359.
“Click Chemistry with Gold Nanoparticles – A Tool for Functionalization, Interlinking and Labeling” Fabian Sander and Marcel Mayor, manuscript prepared for submission.
Finally, within Conclusion and Outlook the main results are briefly summarized and further potential research is proposed
ВЫРАЩИВАНИЕ СУДАКА ЕВРОПЕЙСКОГО SANDER LUCIOPERCA (L.) В СИСТЕМЕ ЗАМКНУТОГО ВОДОСНАБЖЕНИЯ
No full textOver the past decades, aquaculture has become one of the fastest growing areas of food production and is playing an increasingly important role in the economic development of many countries [1].In the Republic of Kazakhstan, European pike perch (Sander lucioperca, L.)) is of great commercial importance and is considered one of the main exported fish species.Until recently, pikeperch rearing under closed water supply conditions (hereinafter referred to as RAS) was not carried out in our country.The industrial methods of fish farming used are mainly aimed at obtaining viable juveniles [2, 3, 4]. There are some scientific studies that consider the issues of raising replacement broodstock in RAS [5].Nature users and fish farmers in our country consider pikeperch as an object of fish farming, living in natural reservoirs, adapted to life in rivers, reservoirs and desalinated areas of the seas. In this regard, the main fishing for pikeperch is carried out in natural reservoirs.The modern vision of fish farming and, in general, the development of aquaculture in the Republic of Kazakhstan comes down to the fact that there is a need for a completely new approach to fish farming using innovative technological processes. In the post-Soviet period, fish breeding scientists [6,7] carried out work to develop biotechnology for growing pikeperch in ponds.The novelty of scientific research was a comprehensive study of the biology and adaptation of a new object of industrial fish farming, European pike perch (Sander lucioperca (L.)). The adaptation capabilities of the European pike perch (Sander lucioperca (L.)) to extreme factors of the aquatic environment have been determined: deficiency of oxygen dissolved in water, high and low concentrations of ions (pH), high concentrations of minerals.The main goal of the research is to develop technological processes for the maintenance and reproduction of European pikeperch (Sander lucioperca (L.)) in closed water supply systems.The objectives of the research were to monitor the temperature and hydrochemical conditions of water in the recirculation system when growing pikeperch, as well as to study the growth rate of pike perch.The results of scientific research will be recommended to fish farms using technologies for basin keeping pikeperch in RAS. Based on the research results, technological methods for growing European pikeperch (Sander lucioperca (L.)) in RAS will be determined.Соңғы онжылдықтарда аквамәдениет азық-түлік өндірісінің ең қарқынды дамып келе жатқан бағыттарының біріне айналды және көптеген елдердің экономикалық дамуында үлкен рөл атқарды [1].Қазақстан Республикасында еуропалық көксерке (Sander lucioperca, L.) үлкен коммерциялық маңызға ие және экспортталатын негізгі балық түрлерінің бірі ретінде қарастырылады.Көксерке тұйық жүйелі қондырғылары (бұдан әрі -ТЖҚ) жағдайында өсіру соңғы уақытқа дейін біздің елде жүргізілмеген.Балық өсірудің қолданылатын индустриялық әдістері негізінен шабақтарды алуға бағытталған [2, 3, 4]. ТЖҚ - арқылы жөндеу-аналық тобын өсіру мәселелерін қарастыратын кейбір ғылыми зерттеулер бар [5].Біздің еліміздің табиғат пайдаланушылары мен балық өсірушілері көксеркені өзендерде, су қоймаларында және теңіздердің тұзсыздандырылғанучаскелерінде өмір сүруге бейімделген табиғи су айдындарында тұратын балық өсіру объектісі деп санайды. Осыған байланысты көксеркенің негізгі балық аулауы табиғи су айдындарында жүзеге асырылады.Қазақстан Республикасында балық өсірудің және жалпы аквамәдениетті дамытудың қазіргі заманғы көзқарасы инновациялық технологиялық процестерді пайдалана отырып, балық өсіруде мүлдем жаңа тәсілдер қажет екендігіне келіп тіреледі. Совет үкметі кезеңінен кейінгі кезеңде балық өсіруші ғалымдар [6,7] тоғандарда көксерке өсірудің биотехникасын әзірлеу бойынша жұмыстар жүргізді.Ғылыми зерттеулердің жаңалығы еуропалық көксеркенің (Sander lucioperca, L.) жаңа өнеркәсіптік балық өсіру объектісінің биологиясы мен бейімделуін жан-жақты зерттеу болды. Еуропалық көксеркенің (Sander lucioperca (L.)) су ортасының экстремалды факторларына бейімделу мүмкіндіктері анықталды: суда еріген оттегінің жетіспеушілігі, иондардың жоғары және төмен концентрациясы (рН), минералдардың жоғары концентрациясы.Зерттеудің негізгі мақсаты- тұйық жүйелі қондырғылары жүйелерінде еуропалық көксеркені (Sander lucioperca (L.)) күтіп ұстау және молықтыру технологиялық процестерін пысықтау.Зерттеудің міндеттері ТЖҚ-дағы судың температуралық және гидрохимиялық режимін бақылау және көксерке өсіру кезінде сондай-ақ көксерке өсу қарқынын зерттеу болды. Ғылыми зерттеулердің нәтижелері ТЖҚ-да көксерке бассейндік ұстау технологияларын қолданатын балық өсіру шаруашылықтарына ұсынылатын болады. Зерттеу нәтижелері бойынша ТЖҚ-да еуропалық көксерке (Sander lucioperca (L.)) өсірудің технологиялық әдістері айқындалатын боладыВ течение последних десятилетий аквакультура стала одним из самых быстроразвивающихся направлений производства пищевой продукции и играет все большую роль в экономическом развитии многих стран [1]. В Республике Казахстан европейский судак (Sander lucioperca, L.)) имеет большое промысловое значение, и рассматривается, как один из основных экспортируемых видов рыб.Выращивание судака в условиях замкнутого водоснабжения (далее УЗВ) до недавнего времени в нашей стране не проводилось. Применяемые индустриальные методы рыбоводства преимущественно направлены на получение жизнестойкой молоди [2, 3, 4]. Имеются некоторые научные исследования по, рассматривающие вопросы выращивания ремонтно-маточного стада в УЗВ [5].Природопользователи и рыбоводы нашей страны считают судака, как объекта рыбоводства, обитающего в естественных водоемах, приспособленного к жизни в реках, водохранилищах и опресненных участках морей. В связи с этим основной промысел судака осуществляется в естественных водоемах.Современное видение рыбоводства и в целом развития аквакультуры в Республике Казахстан сводится к тому, что возникает необходимость совершенно нового подхода в рыбоводстве с использование инновационных технологических процессов. В постсоветский период учеными - рыбоводами [6,7] были проведены работы по разработке биотехники выращивания судака в прудах.Новизной научных исследований явилось комплексное изучение биологии и адаптации нового объекта индустриального рыбоводства европейского судака (Sander lucioperca (L.)). Определены адаптационные возможности европейского судака (Sander lucioperca (L.)) к экстремальным факторам водной среды: дефициту кислорода, растворенного в воде, высокой и низкой концентрации ионов (рН), высокой концентрации минералов.Основной целью исследований является отработка технологических процессов содержания и воспроизводства судака европейского (Sander lucioperca (L.)) в системах замкнутого водоснабжения.Задачами исследований были наблюдения за температурным и гидрохимическим режимом воды в УЗВ при выращивании судака, а также изучение скорости роста судака.Результаты научных исследований будут рекомендованы в рыбоводные хозяйства, применяющие технологии бассейнового содержания судака в УЗВ. По результатам исследований будут определены технологические приемы выращивания судака европейского (Sander lucioperca (L.)) в УЗВ
Cryopreservation of Pike Perch Sperm in Hatchery Conditions
No full textExperiments were carried out on pike perch (Sander lucioperca L.) to find a method for stripping
sperm without contamination by urine, to determine sperm concentration, and to fertilize large
batches of eggs with cryopreserved sperm. Induced spawning technology for pike perch, an
important predator fish species in Hungarian and central-eastern European pond aquaculture,
has been developed only recently. Sperm cryopreservation can be an important tool for several
reasons including the simplification of hatchery work and long-term preservation of genomes of
males with high genetic value. In the present study, sperm was stripped without urine contamination,
improving sperm quality, and large amounts of eggs were fertilized using 0.25 ml sperm,
resulting in hatching percentages of 55±3% for 30-g batches of eggs and 87% for a 50-g batch
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Comparison of Growth in Pike-Perch (Sander lucioperca) and Hybrids of Pike-Perch (S. lucioperca) × Volga Pike-Perch (S. volgensis)
No full textGrowth of intensively cultured pike-perch Sander lucioperca (L.) and hybrids of pike-perch females × Volga pike-perch (S. volgensis Gmelin, 1789) males (1.75 g) were compared in a 35-day experiment. Fish were sorted into three groups (50 fish/aquarium): S. lucioperca grown separately (Group P), hybrids grown separately (Group H), and a mixed group of 25 S. lucioperca (Group Mp) grown together with 25 hybrids (Group Mh). The stocking density was 0.44 g/l. Final body weights were 6.83 g, 6.54 g, 5.17 g, and 4.84 g, and specific growth rates were 3.9%/day, 3.75%/day, 3.1%/day, and 2.89%/day, for groups Mp, P, Mh, and H, respectively. The weight, length, and specific growth rates of the S. lucioperca were significantly higher (p<0.05) than those of the hybrids, whether grown separately or together. The feed conversion rate of the hybrids grown separately was significantly higher (1.28 g/g) than all other groups. Further investigation is needed to study the growth performance of larger hybrids, to compare the hybrid with S. volgensis, and to investigate the possibility of cross hybridization
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Measurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
No full textThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
Der Freundschaft geweiht : Stammbuch
No full textEnthält 8 Stammbucheinträge von Gustav Kaehne, Georg Müller, Ferdinand de Rota, Emma Sander, Henriette Wilke, L. Betke, Witwe Betke, Julius GriesheimHandschrift DE-3, GND 2024680-8, Signatur: 7 B 21Einband: Buchattrappe und Schuber, mit rotem reliefiertem Buntpapier bezogen, Rollenstempelverzierung (Goldprägung), Goldschnitt.Zustand: Papier leicht gebräunt und stockfleckig.Eintragungsorte: BraunschweigTitelvignette: Der Freundschaft geweiht, Bleistiftzeichnung Blatt 2r
Förderprogramm der AOK Rheinland/Hamburg und der AOK NordWest für Nordrhein-Westfalen, Hamburg und Schleswig-Holstein
No full textGröning K, Sander B, Heinrich L. Neue Herausforderungen im Übergang von Krankenhaus in die familiale Pflege. In: Gröning K, Sander B, von Kamen R, eds. Familiensensibles Entlassungsmanagement. Frankfurt am Main: Mabuse-Verlag; 2015: 15-30
Letter from Carl Hayden to L. B. Williams
No full textLetter from Carl Hayden to L. B. Williams concerning the proposed township in the Grand Canyon
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