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Artículos de revistas sobre el tema "Elementen (chemie)"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 27 de enero de 2023

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1

Jutzi, Peter, Jürgen Dahlhaus y Michael Bangel. "(Dimethylaminoethyl)cyclopentadienyl-liganden in der chemie von gruppe-13-elementen (Al, Ga, In". Journal of Organometallic Chemistry 460, n.º 2 (noviembre de 1993): C13—C15. http://dx.doi.org/10.1016/0022-328x(93)83153-m.

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2

Jacob, K., W. Kretschmer, K. H. Thiele, I. Pavlik, A. Ly?ka y J. Hole?ek. "Beitr�ge zur Chemie der Alkylverbindungen von �bergangsmetallen. 57. 2-(Dimethylaminomethyl)ferrocenyl-Verbindungen von 3d-Elementen". Zeitschrift f�r anorganische und allgemeine Chemie 606, n.º 1 (diciembre de 1991): 133–39. http://dx.doi.org/10.1002/zaac.19916060114.

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3

Elsayed Moussa, Mehdi, Michael Seidl, Gábor Balázs, Matthias Hautmann y Manfred Scheer. "Das Potential von Molybdänkomplexen mit unsubstituierten heterodiatomaren Gruppe‐15‐Elementen als Linker in der supramolekularen Chemie". Angewandte Chemie 131, n.º 37 (19 de agosto de 2019): 13035–39. http://dx.doi.org/10.1002/ange.201907067.

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4

Feh�r, F. y F. J. Ocklenburg. "Beitr�ge zur Chemie des Siliciums und des Germaniums. XXXVI. Darstellung von Magnesiumsilicid aus den Elementen durch Sinterung". Zeitschrift f�r anorganische und allgemeine Chemie 530, n.º 11 (noviembre de 1985): 187–90. http://dx.doi.org/10.1002/zaac.19855301122.

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5

Schädel, Matthias. "Chemie superschwerer Elemente". Angewandte Chemie 118, n.º 3 (9 de enero de 2006): 378–414. http://dx.doi.org/10.1002/ange.200461072.

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6

Kratz, Jens Volker. "Chemie der schwersten Elemente". Chemie in unserer Zeit 29, n.º 4 (agosto de 1995): 194–206. http://dx.doi.org/10.1002/ciuz.19950290406.

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7

Compton, Neville. "Die elementaren Werte der Chemie". Angewandte Chemie 131, n.º 1 (18 de diciembre de 2018): 4–8. http://dx.doi.org/10.1002/ange.201813786.

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8

De Villiers, W. Van Z. "Van Seaborg tot sokkerballe: nuwe chemiese elemente en verbindings". Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie 17, n.º 2 (12 de julio de 1998): 79–81. http://dx.doi.org/10.4102/satnt.v17i2.694.

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9

Jahn, Bérénice y Lena Josefine Daumann. "Die faszinierende bioanorganische Chemie der Selten-Erd-Elemente". Chemie in unserer Zeit 52, n.º 3 (10 de enero de 2018): 150–58. http://dx.doi.org/10.1002/ciuz.201700800.

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10

Wang, Shu-Guang y W. H. Eugen Schwarz. "Symbol der Chemie: Das Periodensystem der chemischen Elemente im jungen Jahrhundert". Angewandte Chemie 121, n.º 19 (27 de abril de 2009): 3456–67. http://dx.doi.org/10.1002/ange.200800827.

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11

Hájek, B. "Beiträge zur Chemie der selteneren Elemente; Die thermische Zersetzung von Ammoniumhexafluoroscandat". Zeitschrift für Chemie 5, n.º 9 (2 de septiembre de 2010): 341. http://dx.doi.org/10.1002/zfch.19650050906.

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12

Pokorný, Josef y František Petrů. "Beiträge zur Chemie der selteneren Elemente; Über das Trifluoracetat des Scandiums". Zeitschrift für Chemie 12, n.º 10 (1 de septiembre de 2010): 390–91. http://dx.doi.org/10.1002/zfch.19720121010.

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13

Wiederholt, Winfrid. "Zeichen und Symbole in der frühen pharmazeutischen Chemie Elemente – Gestirne – Gottheiten". Pharmazie in Unserer Zeit 20, n.º 5 (1991): 201–10. http://dx.doi.org/10.1002/pauz.19910200505.

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14

Munz, Dominik y Wilma Neumann. "Trendbericht Anorganische Chemie: Bioanorganische und Koordinationschemie der d‐ und f‐Block‐Elemente". Nachrichten aus der Chemie 68, n.º 1 (enero de 2020): 65–77. http://dx.doi.org/10.1002/nadc.20204093404.

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15

Friedrich, Christoph y Horst Remane. "Marie Curie: Chemie-Nobelpreisträgerin 1911 und Entdeckerin der Elemente Polonium und Radium". Angewandte Chemie 123, n.º 21 (29 de marzo de 2011): 4848–54. http://dx.doi.org/10.1002/ange.201008063.

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16

Petrů, F., B. Hájek y V. Brožek. "Beiträge zur Chemie der selteneren Elemente; Die Hydrolyse von Scandiumcarbid mit verdünnten Säuren". Zeitschrift für Chemie 6, n.º 1 (2 de septiembre de 2010): 32–33. http://dx.doi.org/10.1002/zfch.19660060112.

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17

Pokorny, Josef y František Petrů. "Beiträge zur Chemie der selteneren Elemente; Die Darstellung von Scandiumdichloracetat durch Hydrolyse von Dichloressigsäureäthylester mit Scandiumhydroxid". Zeitschrift für Chemie 15, n.º 6 (1 de septiembre de 2010): 237–38. http://dx.doi.org/10.1002/zfch.19750150622.

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18

Hardinghaus, Christian. "Ein verstrahltes Leben". Der Klinikarzt 46, n.º 09 (septiembre de 2017): 420. http://dx.doi.org/10.1055/s-0043-118620.

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19 Folgen dieser chronologisch aufgebauten Serie hat es gedauert, bis wir heute die erste Frau vorstellen können. Und dabei ist Marie Curie keine Ärztin, hat sich aber in besonderem Maße für die Medizin verdient gemacht. Gleichzeitig stellt Marie Curie auch die erste weibliche Nobelpreisträgerin. Außerdem ist sie bis heute die einzige Wissenschaftlerin, die diesen bedeutenden Preis gleich zweimal in unterschiedlichen Disziplinen gewinnen konnte. 1903 gemeinsam mit ihrem Mann Pierre den Nobelpreis für Physik und 1911 den für Chemie. Verliehen für ihre Entdeckungen der chemischen Elemente Polonium und Radium. Curie prägte auch den Begriff Radioaktivität. Die Polin behandelte als Radiologin verwundete Soldaten im Ersten Weltkrieg, setzte sich für die Förderung von Frauen in der Wissenschaft ein und wagte Versuche, mit denen sie ihr eigenes Leben aufs Spiel setzte. Mit nur 67 Jahren starb Curie an den Langzeitfolgen durch radioaktive Strahlung.

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19

Brazhkin, Vadim V. "Interparticle interaction in condensed media: some elements are "more equal than others"". Uspekhi Fizicheskih Nauk 179, n.º 4 (2009): 393. http://dx.doi.org/10.3367/ufnr.0179.200904e.0393.

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20

Thiele, K. H. y H. Baumann. "Beitr�ge zur Chemie der Alkylverbindungen von �bergangsmetallen. 59. Cyclopentadienyl-2-(dimethylaminomethyl)ferrocenyl-Verbindungen elektronenarmer 3 d-Elemente". Zeitschrift f�r anorganische und allgemeine Chemie 619, n.º 6 (junio de 1993): 1111–14. http://dx.doi.org/10.1002/zaac.19936190624.

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21

Wachter, Joachim. "N. N. Greenwood und A. Earnshaw: Chemie der Elemente. VCH Verlagsgesellschaft, Weinheim 1988. 1707 Seiten, geb., Preis: DM 120,-." Berichte der Bunsengesellschaft für physikalische Chemie 93, n.º 2 (febrero de 1989): 227–28. http://dx.doi.org/10.1002/bbpc.19890930229.

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22

Wedler, Michael, Friedrich Knösel, Ursula Pieper, Dietmar Stalke, Frank T. Edelmann y Hanns-Dieter Amberger. "Sterische Cyclopentadienyl-Äquivalente in der Chemie der f-Elemente: Monomere, homoleptische Lanthanid(III)-tris[N,N′-bis(trimethylsilyl)-benzamidinate]". Chemische Berichte 125, n.º 10 (octubre de 1992): 2171–81. http://dx.doi.org/10.1002/cber.19921251003.

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23

Pokorný, Josef y František Petrů. "Beiträge zur Chemie der selteneren Elemente; Darstellung der Scandium-, Yttrium- und Lanthan-Salze der Monochloressigsäure durch Hydrolyse von Monochloressigsäureäthylester". Zeitschrift für Chemie 12, n.º 8 (1 de septiembre de 2010): 294–95. http://dx.doi.org/10.1002/zfch.19720120810.

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24

Coureaud, G., D. Gibaud, E. Le Berre, B. Schaal y T. Thomas-Danguin. "Proportion of Odorants Impacts the Configural versus Elemental Perception of a Binary Blending Mixture in Newborn Rabbits". Chemical Senses 36, n.º 8 (26 de mayo de 2011): 693–700. http://dx.doi.org/10.1093/chemse/bjr049.

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25

Tölg, Günther y Rainer P. H. Garten. "Große Angst vor kleinen Mengen - die Bedeutung der Analytischen Chemie in der modernen Industriegesellschaft am Beispiel der Spurenanalytik der Elemente". Angewandte Chemie 97, n.º 6 (junio de 1985): 439–48. http://dx.doi.org/10.1002/ange.19850970604.

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26

Ponomarenko, Maxim V., Yuriy A. Serguchev, Markus E. Hirschberg, Gerd-Volker Röschenthaler y Andrey A. Fokin. "Elemental F2with Transannular Dienes: Regioselectivities and Mechanisms". Chemistry - A European Journal 20, n.º 33 (7 de julio de 2014): 10383–91. http://dx.doi.org/10.1002/chem.201402640.

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27

de Oliveira Filho, Emanuel Felipe, Marta Miranda, Tania Ferreiro, Carlos Herrero-Latorre, Pierre Castro Soares y Marta López-Alonso. "Concentrations of Essential Trace and Toxic Elements Associated with Production and Manufacturing Processes in Galician Cheese". Molecules 27, n.º 15 (3 de agosto de 2022): 4938. http://dx.doi.org/10.3390/molecules27154938.

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The objective of this study was to determine the trace element composition and the toxic metal residues in Galician cow’s milk cheese produced in different systems (artisan, industrial, and organic). Fourteen elements (As, Cd, Co, Cr, Cu, Fe, Hg, I, Mn, Mo, Ni, Pb, Se, and Zn) were determined in 58 representative samples of Galician cheeses by inductively coupled plasma mass spectrometry. The toxic elements were present at low concentrations, similar to those reported for other unpolluted geographical areas. The essential elements were also within the normal range in cheeses. There were no statistically significant differences between smoked and unsmoked cheeses for any of the elements. Chemometric analyses (principal component analysis and cluster analysis) revealed that the industrial cheeses produced in Galicia using the milk from intensive dairy farms were different, in terms of elemental content, from artisan and organic cheeses, in which the elemental contents were similar.

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28

Cardin, Marco, Barbara Cardazzo, Jérôme Mounier, Enrico Novelli, Monika Coton y Emmanuel Coton. "Authenticity and Typicity of Traditional Cheeses: A Review on Geographical Origin Authentication Methods". Foods 11, n.º 21 (26 de octubre de 2022): 3379. http://dx.doi.org/10.3390/foods11213379.

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Food fraud, corresponding to any intentional action to deceive purchasers and gain an undue economical advantage, is estimated to result in a 10 to 65 billion US dollars/year economical cost worldwide. Dairy products, such as cheese, in particular cheeses with protected land- and tradition-related labels, have been listed as among the most impacted as consumers are ready to pay a premium price for traditional and typical products. In this context, efficient food authentication methods are needed to counteract current and emerging frauds. This review reports the available authentication methods, either chemical, physical, or DNA-based methods, currently used for origin authentication, highlighting their principle, reported application to cheese geographical origin authentication, performance, and respective advantages and limits. Isotope and elemental fingerprinting showed consistent accuracy in origin authentication. Other chemical and physical methods, such as near-infrared spectroscopy and nuclear magnetic resonance, require more studies and larger sampling to assess their discriminative power. Emerging DNA-based methods, such as metabarcoding, showed good potential for origin authentication. However, metagenomics, providing a more in-depth view of the cheese microbiota (up to the strain level), but also the combination of methods relying on different targets, can be of interest for this field.

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29

Danezis, Georgios, Charis Theodorou, Theofilos Massouras, Evangelos Zoidis, Ioannis Hadjigeorgiou y Constantinos Georgiou. "Greek Graviera Cheese Assessment through Elemental Metabolomics—Implications for Authentication, Safety and Nutrition". Molecules 24, n.º 4 (14 de febrero de 2019): 670. http://dx.doi.org/10.3390/molecules24040670.

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This study presents the comprehensive elemental profile of Greek Graviera (Gruyère) cheeses. In total, 105 samples from nine different geographic regions produced from sheep, goat and cow milk and their mixtures were assessed. Elemental signatures of 61 elements were investigated for determination of geographic origin and milk type. Regional and milk type classification through Linear Discriminant Analysis was successful for almost all cases, while a less optimistic cross validation exercise presented lower classification rates. That points to further research using a much larger sample set, increasing confidence for cheese authentication utilizing also bioinformatics tools under development. This is the first study reporting signatures of 61 elements in dairy products including all sixteen rare earth elements and all seven precious metals. Safety and quality were assessed regarding toxic and nutritive elements. According to both EU and USA regulations and directives, Graviera is a nutritional source for trace and macro elements with low levels of toxic elements.

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30

Alexa, Ersilia, Corina Danciu, Ileana Cocan, Monica Negrea, Adriana Morar, Diana Obistioiu, Diana Dogaru, Adina Berbecea y Isidora Radulov. "Chemical Composition and Antimicrobial Potential of Satureja hortensis L. in Fresh Cow Cheese". Journal of Food Quality 2018 (10 de septiembre de 2018): 1–10. http://dx.doi.org/10.1155/2018/8424035.

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This study presents data about the chemical composition and antimicrobial effect of Satureja hortensis L. used as both dry plant and essential oil, on fresh cow’s cheese, in order to extend its shelf-life. The proximate and elemental composition of dry plant of Satureja hortensis L. highlights important level of microelements. The content of microelements increases even when small amounts of Satureja hortensis in fresh cheese were added. The addition of Satureja hortensis dry plant leads to an increase in Fe (13.46–65.54%) and Mn (8.33–88.33%) content of fresh cheese, depending on the amount of plant added. The composition of essential oil isolated from Satureja hortensis L. was analyzed by GC-MS and the main compounds found were carvacrol (19.68%), o-cymene (30.86%), and p-cymene (28.07%). In order to use Satureja hortensis L. as natural preservative in food industry, in vitro effect of plant extract and essential oil against Staphylococcus aureus Gram-positive bacteria was tested. The oil of Satureja hortensis L. showed antimicrobial activity at 0.50–1.5%, while the alcoholic extract does not inhibit Staphylococcus aureus mycelial growth. The antimicrobial effect of Satureja hortensis L. dry plant in various proportions (0.5–1.5%) and essential oil (0.1%; 0.25%; 0.5%), on fresh cow’s cheese, was assessed after 3 and 7 days by counting colonies obtained at 30°C. Results have shown that the addition of Satureja hortensis L. dry plant and essential oil led to a reduction in the total number of germs, this reduction being more significant when the essential oil was used. Regarding the effect of Satureja hortensis L. essential oil against Staphylococcus aureus inoculated in fresh cow’s cheese, the results highlight that the essential oil of Satureja hortensis L. may be a natural solution to prevent the development of this bacteria, while the ethanol extract does not prove to be effective.

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31

Roy, Sudipta, Christian J. Schürmann, Totan Mondal, Debasis Koley, Regine Herbst-Irmer, Dietmar Stalke y Herbert W. Roesky. "Activation of Elemental Sulfur at a Two-Coordinate Platinum(0) Center". Chemistry - A European Journal 22, n.º 36 (18 de agosto de 2016): 12629–33. http://dx.doi.org/10.1002/chem.201603030.

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32

McClintock, Timothy S., Qiang Wang, Tomoko Sengoku, William B. Titlow y Patrick Breheny. "Mixture and Concentration Effects on Odorant Receptor Response Patterns In Vivo". Chemical Senses 45, n.º 6 (19 de mayo de 2020): 429–38. http://dx.doi.org/10.1093/chemse/bjaa032.

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Abstract Natural odors are mixtures of volatile chemicals (odorants). Odors are encoded as responses of distinct subsets of the hundreds of odorant receptors and trace amine-associated receptors expressed monogenically by olfactory sensory neurons. This is an elegantly simple mechanism for differentially encoding odors but it is susceptible to complex dose–response relationships and interactions between odorants at receptors, which may help explain olfactory phenomena, such as mixture suppression, synthetic versus elemental odor processing, and poorly predictable perceptual outcomes of new odor mixtures. In this study, in vivo tests in freely behaving mice confirm evidence of a characteristic receptor response pattern consisting of a few receptors with strong responses and a greater number of weakly responding receptors. Odorant receptors responsive to an odor are often unrelated and widely divergent in sequence, even when the odor consists of a single species of odorant. Odorant receptor response patterns to a citrus odor broaden with concentration. Some highly sensitive receptors respond only to a low concentration but others respond in proportion to concentration, a feature that may be critical for concentration-invariant perception. Other tests find evidence of interactions between odorants in vivo. All of the odorant receptor responses to a moderate concentration of the fecal malodor indole are suppressed by a high concentration of the floral odorant, α-ionone. Such suppressive effects are consistent with prior evidence that odorant interactions at individual odorant receptors are common.

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33

Wachter, Joachim. "Chemie der Elemente. von N. N. Greenwood und A. Earnshaw. VCH Verlagsgesellschaft, Weinheim 1988. XXIII, 1707 S., geb. DM 120.00. – ISBN 3-527-26169-9". Angewandte Chemie 100, n.º 11 (noviembre de 1988): 1624–25. http://dx.doi.org/10.1002/ange.19881001141.

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34

Vincevica-Gaile, Zane y Maris Klavins. "Concentration of Elements in Food: How Can It Reflect Impact of Environmental and Other Influencing Factors?" Scientific Journal of Riga Technical University. Environmental and Climate Technologies 12, n.º 1 (1 de diciembre de 2013): 15–19. http://dx.doi.org/10.2478/rtuect-2013-0011.

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Abstract Element content of food is variable and can be influenced by different factors. The aim of the present study was to discover the linkage between macro- and microelement concentrations in food produced in Latvia, and possible impacts of environmental factors. More than 300 fresh food samples such as eggs, cottage cheese, honey, root vegetables, apple juice, apple wine were collected in the time period from 2009 to 2011. Samples were mineralised or analysed directly by appropriate method of quantitative analysis: atomic absorption spectrometry, inductively coupled plasma mass spectrometry or total reflection X-ray fluorescence spectrometry. Statistical analysis of data revealed that food elemental content can be influenced by sitespecific factors such as geographical origin, seasonality, environmental pollution.

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35

Prichard, Ashley, Raveena Chhibber, Jon King, Kate Athanassiades, Mark Spivak y Gregory S. Berns. "Decoding Odor Mixtures in the Dog Brain: An Awake fMRI Study". Chemical Senses 45, n.º 9 (14 de octubre de 2020): 833–44. http://dx.doi.org/10.1093/chemse/bjaa068.

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Abstract In working and practical contexts, dogs rely upon their ability to discriminate a target odor from distracting odors and other sensory stimuli. Using awake functional magnetic resonance imaging (fMRI) in 18 dogs, we examined the neural mechanisms underlying odor discrimination between 2 odors and a mixture of the odors. Neural activation was measured during the presentation of a target odor (A) associated with a food reward, a distractor odor (B) associated with nothing, and a mixture of the two odors (A+B). Changes in neural activation during the presentations of the odor stimuli in individual dogs were measured over time within three regions known to be involved with odor processing: the caudate nucleus, the amygdala, and the olfactory bulbs. Average activation within the amygdala showed that dogs maximally differentiated between odor stimuli based on the stimulus-reward associations by the first run, while activation to the mixture (A+B) was most similar to the no-reward (B) stimulus. To clarify the neural representation of odor mixtures in the dog brain, we used a random forest classifier to compare multilabel (elemental) versus multiclass (configural) models. The multiclass model performed much better than the multilabel (weighted-F1 0.44 vs. 0.14), suggesting the odor mixture was processed configurally. Analysis of the subset of high-performing dogs’ brain classification metrics revealed a network of olfactory information-carrying brain regions that included the amygdala, piriform cortex, and posterior cingulate. These results add further evidence for the configural processing of odor mixtures in dogs and suggest a novel way to identify high-performers based on brain classification metrics.

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36

Di Donato, Francesca, Martina Foschi, Nadia Vlad, Alessandra Biancolillo, Leucio Rossi y Angelo Antonio D’Archivio. "Multi-Elemental Composition Data Handled by Chemometrics for the Discrimination of High-Value Italian Pecorino Cheeses". Molecules 26, n.º 22 (15 de noviembre de 2021): 6875. http://dx.doi.org/10.3390/molecules26226875.

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The multi-elemental composition of three typical Italian Pecorino cheeses, Protected Designation of Origin (PDO) Pecorino Romano (PR), PDO Pecorino Sardo (PS) and Pecorino di Farindola (PF), was determined by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). The ICP-OES method here developed allowed the accurate and precise determination of eight major elements (Ba, Ca, Fe, K, Mg, Na, P, and Zn). The ICP-OES data acquired from 17 PR, 20 PS, and 16 PF samples were processed by unsupervised (Principal Component Analysis, PCA) and supervised (Partial Least Square-Discriminant Analysis, PLS-DA) multivariate methods. PCA revealed a relatively high variability of the multi-elemental composition within the samples of a given variety, and a fairly good separation of the Pecorino cheeses according to the geographical origin. Concerning the supervised classification, PLS-DA has allowed obtaining excellent results, both in calibration (in cross-validation) and in validation (on the external test set). In fact, the model led to a cross-validated total accuracy of 93.3% and a predictive accuracy of 91.3%, corresponding to 2 (over 23) misclassified test samples, indicating the adequacy of the model in discriminating Pecorino cheese in accordance with its origin.

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37

Streckert, G. "Chemie der Elemente. VonN. N. Greenwood undA. Earnshaw. VCH Verlagsgesellschaft, Weinheim - Basel - Cambridge - New York 1988. XXIII, 1707 S., zahlr. Abb. u. Tab., geb., DM 120,-". Chemie Ingenieur Technik 60, n.º 10 (octubre de 1988): 768. http://dx.doi.org/10.1002/cite.330601008.

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38

Jutzi, Peter. "Chemie der Elemente. Von. N. N. Green-wood und A. Earnshaw. VCH Verlagsgesellschaft 1988. 1707 S., Abb., Tab., Formeln. DM 120,-. ISBN 3-527-26169-9". Chemie in unserer Zeit 23, n.º 1 (febrero de 1989): 35. http://dx.doi.org/10.1002/ciuz.19890230107.

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39

Chen, Peixing y Chunming Cui. "Isolable Boron Persulfide: Activation of Elemental Sulfur with a 2-Chloro-Azaborolyl Anion". Chemistry - A European Journal 22, n.º 9 (25 de enero de 2016): 2902–5. http://dx.doi.org/10.1002/chem.201505182.

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40

Schneider, Matthias N., Felix Fahrnbauer, Tobias Rosenthal, Markus Döblinger, Christian Stiewe y Oliver Oeckler. "Elemental Distribution and Thermoelectric Properties of Layered Tellurides 39R-M0.067Sb0.667Te0.266 (M=Ge, Sn)". Chemistry - A European Journal 18, n.º 4 (23 de diciembre de 2011): 1209–18. http://dx.doi.org/10.1002/chem.201102331.

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41

Xu‐Xu, Qing‐Feng, Yuji Nishii, Yuta Uetake, Hidehiro Sakurai y Masahiro Miura. "Synthesis of Benzoisoselenazolones via Rh(III)‐Catalyzed Direct Annulative Selenation by Using Elemental Selenium". Chemistry – A European Journal 27, n.º 71 (11 de noviembre de 2021): 17952–59. http://dx.doi.org/10.1002/chem.202103485.

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42

Kassongo, Josue, Esmaeil Shahsavari y Andrew S. Ball. "Substrate-to-inoculum ratio drives solid-state anaerobic digestion of unamended grape marc and cheese whey". PLOS ONE 17, n.º 1 (27 de enero de 2022): e0262940. http://dx.doi.org/10.1371/journal.pone.0262940.

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Inoculation dose is a key operational parameter for the solid-state anaerobic digestion (SS-AD) of lignocellulosic biomass, maximum methane recovery, and stable digester performance. The novelty of this study was the co-digestion of unamended full-strength grape marc and cheese whey for peak methane extraction at variable inoculation levels. An acclimatised digestate from a preceding anaerobic treatment was used as a downstream inoculum. The impact of inoculum size (wet weight) was evaluated at 0/10, 5/5, 7/3 and 9/1 substrate-to-inoculum (S/I) ratios, corresponding to an initial concentration of 20–30% total solids (TS) in digesters over 58 days at 45°C. The optimal 7/3 S/I produced the highest cumulative methane yield, 6.45 L CH4 kg-1 VS, coinciding with the lowest initial salinity at 11%; the highest volumetric methane productivity rate of 0.289±0.044 L CH4 LWork-1 d-1; the highest average COD/N ratio of 9.88; the highest final pH of 9.13, and a maximum 15.07% elemental carbon removal; for a lag time of 9.4 days. This study identified an optimal inoculation dose and opens up an avenue for the direct co-digestion of grape marc and cheese whey without requirements for substrate pretreatment, thus improving the overall bioenergy profile of the winery and dairy joint resource recovery operations.

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Pokorny, Josef. "Beiträge zur Chemie der selteneren Elemente; Über Alkali- und Ammoniumsalze von Halogenessigsäuren; Die Bestimmung der Löslichkeit und Untersuchung von ternären Zustandsdiagrammen von Rubidiumchloracetaten-Chloressigsäuren-H2O bei 20°C". Zeitschrift für Chemie 15, n.º 5 (1 de septiembre de 2010): 197–98. http://dx.doi.org/10.1002/zfch.19750150517.

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Pokorny, Josef. "Beiträge zur Chemie der selteneren Elemente; Über Alkali- und Ammoniumsalze von Halogenessigsäuren;) Die Bestimmung der Löslichkeit und Untersuchung der ternären Zustandsdiagramme von Cäsiumchloracetaten-Chloressigsäuren-H2O bei 20°C". Zeitschrift für Chemie 15, n.º 6 (1 de septiembre de 2010): 238–39. http://dx.doi.org/10.1002/zfch.19750150623.

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45

Mongwe, T., T. Ntuli, L. Sikeyi, N. Coville, M. Mamo, J. Serbena y M. Maubane-Nkadimeng. "The use of ex-situ nitrogen-doped olive oil-derived carbon nano-onions for application in chemi-resistive gas sensors to detect acetone at room temperature". South African Journal of Chemistry 76 (2022): 38–48. http://dx.doi.org/10.17159/0379-4350/2022/v76a07.

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This study reports on the synthesis of carbon nano-onions (CNOs; ca. d ≤ 55 nm) and nitrogen-doped CNOs (N-CNOs) using a facile pyrolysis method and ex-situ doping of the CNOs. Elemental analysis of the N-CNOs revealed that their nitrogen content depended on the ammonia flow rate. Analysis of the N-CNOs revealed that they all exhibited structural defects. After the successful synthesis of CNOs and N-CNOs, polyvinylpyrrolidone (PVP):CNOs/N-CNOs:MnO2-nanorods (MONRs) composites were prepared and used as active sensing materials. In every case, the PVP polymer was used to stabilize the MONRs for acetone detection at 25 °C. The chemi-resistive gas sensors that showed the highest acetone sensitivity (pS = 2.0 × 10−4 ppm−1 ) was fabricated using a pristine CNOs (pCNOs) based composite. However, the N-CNOs based sensor (a1.5S) presented the lowest acetone limit of detection (LoD) at 1.2 ppm. The study implicated the effect of the nitrogen and oxygen content of the CNOs surfaces on the acetone detection. Thus, a higher sensitivity with lower LoD was observed at room temperature using the pCNOs based sensor, when compared to earlier literature reports.

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46

Holthoff, Jana M., Elric Engelage, Alexander B. Kowsari, Stefan M. Huber y Robert Weiss. "Noble Metal Corrosion: Halogen Bonded Iodocarbenium Iodides Dissolve Elemental Gold—Direct Access to Gold–Carbene Complexes". Chemistry – A European Journal 25, n.º 31 (7 de mayo de 2019): 7480–84. http://dx.doi.org/10.1002/chem.201901583.

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Franz, Daniel y Shigeyoshi Inoue. "Activation of Elemental Sulfur by Aluminum Dihydride: Isolation of Mono- and Bis(hydrogensulfide) Complexes of Aluminum". Chemistry - A European Journal 20, n.º 34 (22 de abril de 2014): 10645–49. http://dx.doi.org/10.1002/chem.201402293.

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Matson, Ellen M., Mitchell D. Goshert, John J. Kiernicki, Brian S. Newell, Phillip E. Fanwick, Matthew P. Shores, Justin R. Walensky y Suzanne C. Bart. "Synthesis of Terminal Uranium(IV) Disulfido and Diselenido Compounds by Activation of Elemental Sulfur and Selenium". Chemistry - A European Journal 19, n.º 48 (22 de octubre de 2013): 16176–80. http://dx.doi.org/10.1002/chem.201303095.

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Kulczycki, Grzegorz y Elżbieta Sacała. "Sulfur application alleviates chromium stress in maize and wheat". Open Chemistry 18, n.º 1 (29 de agosto de 2020): 1093–104. http://dx.doi.org/10.1515/chem-2020-0155.

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AbstractThis study aimed to examine the influence of increasing doses of chromium (Cr) (26, 39, and 52 mg kg−1 soil) and elemental sulfur (S) (60 mg kg−1 soil) on growth, yield, and mineral nutrition in wheat and maize. Macro- and micronutrients and Cr concentrations were determined in the aboveground parts of plants. All examined doses of Cr caused a marked decrease in the fresh and dry weight of maize. Wheat was more tolerant than maize, and lower Cr doses caused a small but statistically significant increase in the total yield. Wheat accumulated more than twofold Cr than maize, and the concentrations increased with higher Cr concentrations in the soil. The application of S significantly improved the total biomass production and lowered the Cr content in both plants. Cr changed the mineral nutrition in both cereals, but the pattern of changes observed was not the same. Applying S alleviated some adverse effects caused by the Cr. Hence, it is concluded that the application of elemental S may be an effective strategy to reduce adverse effects in plants grown on soil contaminated by heavy metals, especially Cr.

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Chioma, Festus, Anthony C. Ekennia, Aderoju A. Osowole, Sunday N. Okafor, Collins U. Ibeji, Damian C. Onwudiwe y Oguejiofo T. Ujam. "Synthesis, characterization, in-vitro antimicrobial properties, molecular docking and DFT studies of 3-{(E)-[(4,6-dimethylpyrimidin-2-yl)imino]methyl} naphthalen-2-ol and Heteroleptic Mn(II), Co(II), Ni(II) and Zn(II) complexes". Open Chemistry 16, n.º 1 (20 de marzo de 2018): 184–200. http://dx.doi.org/10.1515/chem-2018-0020.

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AbstractHeteroleptic divalent metal complexes [M(L) (bipy)(Y)]•nH2O (where M = Mn, Co, Ni, and Zn; L = Schiff base; bipy = 2,2’-bipyridine; Y = OAc and n = 0, 1) have been synthesized from pyrimidine Schiff base ligand 3-{(E)-[(4,6-dimethylpyrimidin-2-yl)imino]methyl} naphthalen-2-ol, 2,2’-bipyridine and metal(II) acetate salts. The Schiff base and its complexes were characterized by analytical (CHN elemental analyses, solubility, melting point, conductivity) measurements, spectral (IR, UV-vis, 1H and 13C-NMR and MS) and magnetometry. The elemental analyses, Uv-vis spectra and room temperature magnetic moment data provide evidence of six coordinated octahedral geometry for the complexes. The metal complexes’ low molar conductivity values in dimethylsulphoxide suggested that they were non-ionic in nature. The compounds displayed moderate to good antimicrobial and antifungal activities against S. aureus, P. aeruginosa, E. coli, B. cereus, P. mirabilis, K. oxytoca, A. niger, A. flevus and R. Stolonifer. The compounds also exhibited good antioxidant potentials with ferrous ion chelation and, 1-diphenyl-2-picryl-hydrazyl (DPPH) radical scavenging assays. Molecular docking studies showed a good interaction with drug targets used. The structural and electronic properties of complexes were further confirmed by density functional theory calculations.

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