TY  - JOUR
A1  - Wilson, J. S.
A1  - Chawdhury, Nazia
A1  - Al-Mandhary, Muna R. A.
A1  - Younus, M.
A1  - Khan, Muhammad S.
A1  - Raithby, Paul R.
A1  - Friend, Richard H.
T1  - The energy gap law for triplet States in Pt-containing conjugated polymers and monomers
Y1  - 2001
ER  - 
TY  - JOUR
A1  - Librado, Pablo
A1  - Gamba, Cristina
A1  - Gaunitz, Charleen
A1  - Sarkissian, Clio Der
A1  - Pruvost, Melanie
A1  - Albrechtsen, Anders
A1  - Fages, Antoine
A1  - Khan, Naveed
A1  - Schubert, Mikkel
A1  - Jagannathan, Vidhya
A1  - Serres-Armero, Aitor
A1  - Kuderna, Lukas F. K.
A1  - Povolotskaya, Inna S.
A1  - Seguin-Orlando, Andaine
A1  - Lepetz, Sebastien
A1  - Neuditschko, Markus
A1  - Theves, Catherine
A1  - Alquraishi, Saleh A.
A1  - Alfarhan, Ahmed H.
A1  - Al-Rasheid, Khaled A. S.
A1  - Rieder, Stefan
A1  - Samashev, Zainolla
A1  - Francfort, Henri-Paul
A1  - Benecke, Norbert
A1  - Hofreiter, Michael
A1  - Ludwig, Arne
A1  - Keyser, Christine
A1  - Marques-Bonet, Tomas
A1  - Ludes, Bertrand
A1  - Crubezy, Eric
A1  - Leeb, Tosso
A1  - Willerslev, Eske
A1  - Orlando, Ludovic
T1  - Ancient genomic changes associated with domestication of the horse
JF  - Science
N2  - The genomic changes underlying both early and late stages of horse domestication remain largely unknown. We examined the genomes of 14 early domestic horses from the Bronze and Iron Ages, dating to between similar to 4.1 and 2.3 thousand years before present. We find early domestication selection patterns supporting the neural crest hypothesis, which provides a unified developmental origin for common domestic traits. Within the past 2.3 thousand years, horses lost genetic diversity and archaic DNA tracts introgressed from a now-extinct lineage. They accumulated deleterious mutations later than expected under the cost-of-domestication hypothesis, probably because of breeding from limited numbers of stallions. We also reveal that Iron Age Scythian steppe nomads implemented breeding strategies involving no detectable inbreeding and selection for coat-color variation and robust forelimbs.
Y1  - 2017
U6  - https://doi.org/10.1126/science.aam5298
SN  - 0036-8075
SN  - 1095-9203
VL  - 356
SP  - 442
EP  - 445
PB  - American Assoc. for the Advancement of Science
CY  - Washington
ER  - 
TY  - JOUR
A1  - Horton, Benjamin P.
A1  - Khan, Nicole S.
A1  - Cahill, Niamh
A1  - Lee, Janice S. H.
A1  - Shaw, Timothy A.
A1  - Garner, Andra J.
A1  - Kemp, Andrew C.
A1  - Engelhart, Simon E.
A1  - Rahmstorf, Stefan
T1  - Estimating global mean sea-level rise and its uncertainties by 2100 and 2300 from an expert survey
JF  - npj Climate and Atmospheric Science
N2  - Sea-level rise projections and knowledge of their uncertainties are vital to make informed mitigation and adaptation decisions. To elicit projections from members of the scientific community regarding future global mean sea-level (GMSL) rise, we repeated a survey originally conducted five years ago. Under Representative Concentration Pathway (RCP) 2.6, 106 experts projected a likely (central 66% probability) GMSL rise of 0.30-0.65 m by 2100, and 0.54-2.15 m by 2300, relative to 1986-2005. Under RCP 8.5, the same experts projected a likely GMSL rise of 0.63-1.32 m by 2100, and 1.67-5.61 m by 2300. Expert projections for 2100 are similar to those from the original survey, although the projection for 2300 has extended tails and is higher than the original survey. Experts give a likelihood of 42% (original survey) and 45% (current survey) that under the high-emissions scenario GMSL rise will exceed the upper bound (0.98 m) of the likely range estimated by the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, which is considered to have an exceedance likelihood of 17%. Responses to open-ended questions suggest that the increases in upper-end estimates and uncertainties arose from recent influential studies about the impact of marine ice cliff instability on the meltwater contribution to GMSL rise from the Antarctic Ice Sheet.
KW  - projections
KW  - Greenland
KW  - consequences
KW  - climate
Y1  - 2020
U6  - https://doi.org/10.1038/s41612-020-0121-5
SN  - 2397-3722
VL  - 3
IS  - 1
SP  - 1
EP  - 8
PB  - Springer Nature
CY  - London
ER  - 
TY  - GEN
A1  - Horton, Benjamin P.
A1  - Khan, Nicole S.
A1  - Cahill, Niamh
A1  - Lee, Janice S. H.
A1  - Shaw, Timothy A.
A1  - Garner, Andra J.
A1  - Kemp, Andrew C.
A1  - Engelhart, Simon E.
A1  - Rahmstorf, Stefan
T1  - Estimating global mean sea-level rise and its uncertainties by 2100 and 2300 from an expert survey
T2  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - Sea-level rise projections and knowledge of their uncertainties are vital to make informed mitigation and adaptation decisions. To elicit projections from members of the scientific community regarding future global mean sea-level (GMSL) rise, we repeated a survey originally conducted five years ago. Under Representative Concentration Pathway (RCP) 2.6, 106 experts projected a likely (central 66% probability) GMSL rise of 0.30-0.65 m by 2100, and 0.54-2.15 m by 2300, relative to 1986-2005. Under RCP 8.5, the same experts projected a likely GMSL rise of 0.63-1.32 m by 2100, and 1.67-5.61 m by 2300. Expert projections for 2100 are similar to those from the original survey, although the projection for 2300 has extended tails and is higher than the original survey. Experts give a likelihood of 42% (original survey) and 45% (current survey) that under the high-emissions scenario GMSL rise will exceed the upper bound (0.98 m) of the likely range estimated by the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, which is considered to have an exceedance likelihood of 17%. Responses to open-ended questions suggest that the increases in upper-end estimates and uncertainties arose from recent influential studies about the impact of marine ice cliff instability on the meltwater contribution to GMSL rise from the Antarctic Ice Sheet.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1437 
KW  - projections
KW  - Greenland
KW  - consequences
KW  - climate
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-516788
SN  - 1866-8372
IS  - 1
ER  - 
TY  - JOUR
A1  - Rienks, Emile D. L.
A1  - Wimmer, S.
A1  - Sanchez-Barriga, Jaime
A1  - Caha, O.
A1  - Mandal, Partha Sarathi
A1  - Ruzicka, J.
A1  - Ney, A.
A1  - Steiner, H.
A1  - Volobuev, V. V.
A1  - Groiss, H.
A1  - Albu, M.
A1  - Kothleitner, G.
A1  - Michalicka, J.
A1  - Khan, S. A.
A1  - Minar, J.
A1  - Ebert, H.
A1  - Bauer, G.
A1  - Freyse, Friedrich
A1  - Varykhalov, Andrei
A1  - Rader, Oliver
A1  - Springholz, Gunther
T1  - Large magnetic gap at the Dirac point in Bi2Te3/MnBi2Te4 heterostructures
JF  - Nature : the international weekly journal of science
N2  - Magnetically doped topological insulators enable the quantum anomalous Hall effect (QAHE), which provides quantized edge states for lossless charge-transport applications(1-8). The edge states are hosted by a magnetic energy gap at the Dirac point(2), but hitherto all attempts to observe this gap directly have been unsuccessful. Observing the gap is considered to be essential to overcoming the limitations of the QAHE, which so far occurs only at temperatures that are one to two orders of magnitude below the ferromagnetic Curie temperature, T-C (ref. (8)). Here we use low-temperature photoelectron spectroscopy to unambiguously reveal the magnetic gap of Mn-doped Bi2Te3, which displays ferromagnetic out-of-plane spin texture and opens up only below T-C. Surprisingly, our analysis reveals large gap sizes at 1 kelvin of up to 90 millielectronvolts, which is five times larger than theoretically predicted(9). Using multiscale analysis we show that this enhancement is due to a remarkable structure modification induced by Mn doping: instead of a disordered impurity system, a self-organized alternating sequence of MnBi2Te4 septuple and Bi2Te3 quintuple layers is formed. This enhances the wavefunction overlap and size of the magnetic gap(10). Mn-doped Bi2Se3 (ref. (11)) and Mn-doped Sb2Te3 form similar heterostructures, but for Bi2Se3 only a nonmagnetic gap is formed and the magnetization is in the surface plane. This is explained by the smaller spin-orbit interaction by comparison with Mn-doped Bi2Te3. Our findings provide insights that will be crucial in pushing lossless transport in topological insulators towards room-temperature applications.
Y1  - 2019
U6  - https://doi.org/10.1038/s41586-019-1826-7
SN  - 0028-0836
SN  - 1476-4687
VL  - 576
IS  - 7787
SP  - 423
EP  - 428
PB  - Nature Publ. Group
CY  - London
ER  - 
TY  - JOUR
A1  - Zhang, Ning
A1  - Hayer, Anna
A1  - Al-Suti, Mohammed K.
A1  - Al-Belushi, Rayya A.
A1  - Khan, Muhammad S.
A1  - Köhler, Anna
T1  - The effect of delocalization on the exchange energy in meta- and para-linked Pt-containing carbazole polymers and monomers
N2  - A series of novel platinum-containing carbazole monomers and polymers was synthesized and fully characterized by UV-VIS absorption, luminescence, and photoinduced absorption studies. In these compounds, a carbazole unit is incorporated into the main chain via either a para- or a meta-linkage. We discuss the effects of linkage and polymerization on the energy levels of S-1, T-1, and T-n. The S-1-T-1 splitting observed for the meta-linked monomer (0.4 eV) is only half of that in the para-linked monomer (0.8 eV). Upon polymerization, the exchange energy in the para- linked compound reduces, yet still remains larger than in the meta-linked polymer. We attribute the difference in exchange energy to the difference in wave function overlap between electron and hole in these compounds. (c) 2006 American Institute of Physics
Y1  - 2006
UR  - http://scitation.aip.org/getpdf/servlet/ GetPDFServlet?filetype=pdf&id=JCPSA6000124000024244701000001&idtype=cvips&doi=10.1063/1.2200351&prog=normal
U6  - https://doi.org/10.1063/1.2200351
ER  - 
TY  - JOUR
A1  - Khan, Muhammad S.
A1  - Al-Mandhary, Muna R. A.
A1  - Al-Suti, Mohammed K.
A1  - Al-Battashi, Fathiya R.
A1  - Al-Saadi, Sultan
A1  - Bjernemose, Jens K.
A1  - Mahon, Mary F.
A1  - Chawdhury, Nazia
A1  - Yonus, Muhammad
A1  - Köhler, Anna
A1  - Teat, Simon J.
A1  - Marseglia, Elizabeth A.
A1  - Tedesco, Emilio
A1  - Feeder, Neil
A1  - Ahrens, Birte
A1  - Raithby, Paul R.
T1  - Synthesis, characterisation and optical spectroscopy of platinum(II) di-ynes and poly-ynes incorporating condensed aromatic spacers in the backbone
Y1  - 2004
U6  - https://doi.org/10.1039/B405070C
SN  - 1477-9226
ER  - 
TY  - JOUR
A1  - Hayer, Anna
A1  - Köhler, Anna
A1  - Arisi, E.
A1  - Bergenti, I.
A1  - Dediu, A.
A1  - Taliani, C.
A1  - Al-Suti, Mohammed K.
A1  - Khan, Muhammad S.
T1  - Polymer light-emitting diodes with spin-polarised charge injection.
Y1  - 2004
SN  - 0379-6779
ER  - 
TY  - JOUR
A1  - Islam, Khan M. S.
A1  - Khalil, Mahmoud Abd Elhamid
A1  - Maenner, Klaus
A1  - Raila, Jens
A1  - Rawel, Harshadrai Manilal
A1  - Zentek, Jürgen
A1  - Schweigert, Florian J.
T1  - Lutein Specific Relationships among Some Spectrophotometric and Colorimetric Parameters of Chicken Egg Yolk
JF  - The journal of poultry science
N2  - Lutein is an essential dietary carotenoid with health benefits and is inter alia responsible for the colouration of egg yolk. The relationship between lutein accumulation and egg yolk colouration was therefore studied in more detail. After feeding a low-luteine diet for 21 days, 14 birds (Lohmann brown hens aged 20 weeks) were fed a diet containing marigold (80 mg lutein/kg feed) and 14 other birds were fed a diet containing oleoresin (45 mg lutein/kg feed) for 21 days; for both groups of birds, this feeding period was followed by withdrawal for 21 days. The Roche Yolk Colour Fan (RYCF) score (0 to 15, where higher values denote greater colour intensity; R-2=0.87; P<0.01) and redness (R-2=0.89; P<0.01) increased with increasing lutein content of egg yolk. Total carotenoid content had a poor relationship with lightness (R-2=0.13; P>0.05) and yellowness (R-2=0.12; P>0.05) of the yolk. It may be concluded that increased lutein is potentially responsible for an increased RYCF score and redness (a*), but decreased yellowness (b*) and lightness (L*), of egg yolk.
KW  - carotenoid
KW  - HPLC
KW  - iCheck
KW  - lutein
KW  - spectrophotometry
KW  - yolk
Y1  - 2017
U6  - https://doi.org/10.2141/jpsa.0160065
SN  - 1346-7395
VL  - 54
SP  - 271
EP  - 277
PB  - Japan Poultry Science Association
CY  - Tsukuba
ER  - 
TY  - JOUR
A1  - Fages, Antoine
A1  - Hanghoj, Kristian
A1  - Khan, Naveed
A1  - Gaunitz, Charleen
A1  - Seguin-Orlando, Andaine
A1  - Leonardi, Michela
A1  - Constantz, Christian McCrory
A1  - Gamba, Cristina
A1  - Al-Rasheid, Khaled A. S.
A1  - Albizuri, Silvia
A1  - Alfarhan, Ahmed H.
A1  - Allentoft, Morten
A1  - Alquraishi, Saleh
A1  - Anthony, David
A1  - Baimukhanov, Nurbol
A1  - Barrett, James H.
A1  - Bayarsaikhan, Jamsranjav
A1  - Benecke, Norbert
A1  - Bernaldez-Sanchez, Eloisa
A1  - Berrocal-Rangel, Luis
A1  - Biglari, Fereidoun
A1  - Boessenkool, Sanne
A1  - Boldgiv, Bazartseren
A1  - Brem, Gottfried
A1  - Brown, Dorcas
A1  - Burger, Joachim
A1  - Crubezy, Eric
A1  - Daugnora, Linas
A1  - Davoudi, Hossein
A1  - Damgaard, Peter de Barros
A1  - de Chorro y de Villa-Ceballos, Maria de los Angeles
A1  - Deschler-Erb, Sabine
A1  - Detry, Cleia
A1  - Dill, Nadine
A1  - Oom, Maria do Mar
A1  - Dohr, Anna
A1  - Ellingvag, Sturla
A1  - Erdenebaatar, Diimaajav
A1  - Fathi, Homa
A1  - Felkel, Sabine
A1  - Fernandez-Rodriguez, Carlos
A1  - Garcia-Vinas, Esteban
A1  - Germonpre, Mietje
A1  - Granado, Jose D.
A1  - Hallsson, Jon H.
A1  - Hemmer, Helmut
A1  - Hofreiter, Michael
A1  - Kasparov, Aleksei
A1  - Khasanov, Mutalib
A1  - Khazaeli, Roya
A1  - Kosintsev, Pavel
A1  - Kristiansen, Kristian
A1  - Kubatbek, Tabaldiev
A1  - Kuderna, Lukas
A1  - Kuznetsov, Pavel
A1  - Laleh, Haeedeh
A1  - Leonard, Jennifer A.
A1  - Lhuillier, Johanna
A1  - von Lettow-Vorbeck, Corina Liesau
A1  - Logvin, Andrey
A1  - Lougas, Lembi
A1  - Ludwig, Arne
A1  - Luis, Cristina
A1  - Arruda, Ana Margarida
A1  - Marques-Bonet, Tomas
A1  - Silva, Raquel Matoso
A1  - Merz, Victor
A1  - Mijiddorj, Enkhbayar
A1  - Miller, Bryan K.
A1  - Monchalov, Oleg
A1  - Mohaseb, Fatemeh A.
A1  - Morales, Arturo
A1  - Nieto-Espinet, Ariadna
A1  - Nistelberger, Heidi
A1  - Onar, Vedat
A1  - Palsdottir, Albina H.
A1  - Pitulko, Vladimir
A1  - Pitskhelauri, Konstantin
A1  - Pruvost, Melanie
A1  - Sikanjic, Petra Rajic
A1  - Papesa, Anita Rapan
A1  - Roslyakova, Natalia
A1  - Sardari, Alireza
A1  - Sauer, Eberhard
A1  - Schafberg, Renate
A1  - Scheu, Amelie
A1  - Schibler, Jorg
A1  - Schlumbaum, Angela
A1  - Serrand, Nathalie
A1  - Serres-Armero, Aitor
A1  - Shapiro, Beth
A1  - Seno, Shiva Sheikhi
A1  - Shevnina, Irina
A1  - Shidrang, Sonia
A1  - Southon, John
A1  - Star, Bastiaan
A1  - Sykes, Naomi
A1  - Taheri, Kamal
A1  - Taylor, William
A1  - Teegen, Wolf-Rudiger
A1  - Vukicevic, Tajana Trbojevic
A1  - Trixl, Simon
A1  - Tumen, Dashzeveg
A1  - Undrakhbold, Sainbileg
A1  - Usmanova, Emma
A1  - Vahdati, Ali
A1  - Valenzuela-Lamas, Silvia
A1  - Viegas, Catarina
A1  - Wallner, Barbara
A1  - Weinstock, Jaco
A1  - Zaibert, Victor
A1  - Clavel, Benoit
A1  - Lepetz, Sebastien
A1  - Mashkour, Marjan
A1  - Helgason, Agnar
A1  - Stefansson, Kari
A1  - Barrey, Eric
A1  - Willerslev, Eske
A1  - Outram, Alan K.
A1  - Librado, Pablo
A1  - Orlando, Ludovic
T1  - Tracking five millennia of horse management with extensive ancient genome time series
JF  - Cell
N2  - Horse domestication revolutionized warfare and accelerated travel, trade, and the geographic expansion of languages. Here, we present the largest DNA time series for a non-human organism to date, including genome-scale data from 149 ancient animals and 129 ancient genomes (>= 1-fold coverage), 87 of which are new. This extensive dataset allows us to assess the modem legacy of past equestrian civilisations. We find that two extinct horse lineages existed during early domestication, one at the far western (Iberia) and the other at the far eastern range (Siberia) of Eurasia. None of these contributed significantly to modern diversity. We show that the influence of Persian-related horse lineages increased following the Islamic conquests in Europe and Asia. Multiple alleles associated with elite-racing, including at the MSTN "speed gene," only rose in popularity within the last millennium. Finally, the development of modem breeding impacted genetic diversity more dramatically than the previous millennia of human management.
Y1  - 2019
U6  - https://doi.org/10.1016/j.cell.2019.03.049
SN  - 0092-8674
SN  - 1097-4172
VL  - 177
IS  - 6
SP  - 1419
EP  - 1435
PB  - Cell Press
CY  - Cambridge
ER  - 
TY  - JOUR
A1  - Yang, C.
A1  - Vardeny, Z. V.
A1  - Köhler, Anna
A1  - Wohlgenannt, M.
A1  - Al-Suti, Mohammed K.
A1  - Khan, Muhammad S.
T1  - Spectroscopic study of spin-dependent exciton formation rates in pi-conjugated semiconductors : Comparison with electroluminescence techniques
N2  - It has been found in recent measurements that the singlet-to-triplet exciton ratio in organic light-emitting diodes (OLEDs) is larger than expected from spin degeneracy, and that singlet excitons form at a larger rate than triplets. We employed the technique of optically detected magnetic resonance to measure the spin-dependent exciton formation rates in films of a polymer and corresponding monomer, and explore the relation between the formation rates and the actual singlet-to-triplet ratio measured previously in OLEDs. We found that the spin-dependent exciton formation rates can indeed quantitatively explain the observed exciton yields, and that singlet formation rates and yields are significantly enhanced only in polymer OLEDs, but not in OLEDs made from the corresponding monomer
Y1  - 2004
ER  - 
TY  - JOUR
A1  - Devi, Lekshmi Sudha
A1  - Al-Suti, Mohammed K.
A1  - Dosche, Carsten
A1  - Khan, Muhammad S.
A1  - Friend, Richard H.
A1  - Köhler, Anna
T1  - Triplet energy transfer in conjugated polymers : I. Experimental investigation of a weakly disordered compound
N2  - Efficient triplet exciton emission has allowed improved operation of organic light-emitting diodes (LEDs). To enhance the device performance, it is necessary to understand what governs the motion of triplet excitons through the organic semiconductor. Here, we have investigated triplet diffusion using a model compound that has weak energetic disorder. The Dexter-type triplet energy transfer is found to be thermally activated down to a transition temperature T- T, below which the transfer rate is only weakly temperature dependent. We show that above the transition temperature, Dexter energy transfer can be described within the framework of Marcus theory. We suggest that below T-T, the nature of the transfer changes from phonon-assisted hopping to quantum-mechanical tunneling. The lower electron-phonon coupling and higher electronic coupling in the polymer compared to the monomer results in an enhanced triplet diffusion rate.
Y1  - 2008
ER  - 
TY  - JOUR
A1  - Khalil, Mahmoud
A1  - Raila, Jens
A1  - Ali, Mostafa
A1  - Islam, Khan M. S.
A1  - Schenk, Regina
A1  - Krause, Jens-Peter
A1  - Schweigert, Florian J.
A1  - Rawel, Harshadrai Manilal
T1  - Stability and bioavailability of lutein ester supplements from Tagetes flower prepared under food processing conditions
JF  - Journal of functional food
N2  - Tagetes spp. belongs to the Asteraceae family. It is recognized as a major source of lutein ester (lutein esterified with fatty acids such as lauric, myristic and palmitic acids), a natural colorant belonging to the xanthophylls or oxygenated carotenoids. Four species of Tagetes flower (Tagetes tenuifolia, Tagetes erecta, Tagetes patula, and Tagetes lucida) were used to extract lutein and lutein esters with three different methods. The results showed that T. erecta, type "orangeprinz", is the richest source of lutein esters (14.4 +/- 0.234 mg/g) in comparison to other Tagetes spp. No significant differences between extractions of lutein esters with medium-chain triacylglycerols (MCT) oil, orange oil or solvent (hexane/isopropanol) could be observed. MCT oil also improved stability of lutein esters at 100 degrees C for 40 min. Emulsification of MCT oil improved the stability of lutein ester extract against UV light at 365 nm for 72 h. Finally, an emulsion was prepared under food processing conditions, spray dried and its bioavailability investigated in a preliminary human intervention study. The results show a lower resorption, but further data suggest improvements in implementation of such supplements. (c) 2012 Elsevier Ltd. All rights reserved.
KW  - Tagetes
KW  - Lutein ester
KW  - Emulsion
KW  - Stability
KW  - Whey protein
KW  - Bioavailability
Y1  - 2012
U6  - https://doi.org/10.1016/j.jff.2012.03.006
SN  - 1756-4646
VL  - 4
IS  - 3
SP  - 602
EP  - 610
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Machumi, F.
A1  - Yenesew, Abiy
A1  - Midiwo, J. O.
A1  - Heydenreich, Matthias
A1  - Kleinpeter, Erich
A1  - Khan, S.
A1  - Tekwani, B. L.
A1  - Walker, L. A.
A1  - Muhammad, I
T1  - Antiparasitic and anticancer carvotacetone derivatives from Sphaeranthus bullatus
T2  - Planta medica : journal of medicinal plant and natural product research
Y1  - 2012
SN  - 0032-0943
VL  - 78
IS  - 11
SP  - 1201
EP  - 1202
PB  - Thieme
CY  - Stuttgart
ER  -