bluuebunny/crossref_metadata_2025_split huggingface dataset:
C–H Activation with Iridium(III) and Rhodium(III) Alkyl Complexes Containing a 2,2′‐Bipyridyl Ligand
Authors: Yi Xiao‐Yi , Chan Ka‐Wang , Huang Enrique Kwang , Sau Yiu‐Keung , Williams Ian D. , Leung Wa‐Hung 
Published: May 2010

AbstractHeating [Rh(dtbpy)(κ2‐C,C′‐CH2CMe2C6H4)(CH2CMe2Ph)] (1; dtbpy = 4,4′‐di‐tert‐butyl‐2,2′‐bipyridyl) in p‐xylene at 110 °C resulted in the formation of the 2‐tert‐butylphenyl complex [Rh(dtbpy)(κ2‐C,C′‐CH2CMe2C6H4)(C6H4tBu‐2)] (3). Treatment of complex 1 with diethyl phosphite gave the phosphito‐bridged dimer [Rh(dtbpy)(κ2‐C,C′‐CH2CMe2C6H4){P(O)(OEt)2}]2 (4). Refluxing [Ir(dtbpy)(κ2‐C,C′‐CH2CMe2C6H4)(C6H4tBu‐2)] (2) with 2‐phenylpyridine (ppyH) and 4‐(2‐pyridyl)benzaldehyde in toluene followed by column chromatography afforded [Ir(dtbpy)(CH2CMe2Ph)Cl(κ2‐N,C‐ppy)] (5) and the carbonyl complex [Ir(dtbpy)(CH2CMe2Ph)(CO)(R)] (6) [R = 4‐(2‐pyridyl)phenyl], respectively. Anion metathesis of [M(dtbpy)(CH2CMe2Ph)(H2O)(OTs)2] with NaBArF4 [ArF = 3,5‐(CF3)2C6H3] afforded cationic [M(dtbpy)(CH2CMe2Ph)(H2O)(μ‐OTs)]2[BArF4]2 [M = Rh (7), Ir (8)] that are capable of catalyzing H/D exchange of tetrahydrofuran by using D2O as the deuterium source. The crystal structures of complexes 4–7 were determined.
Linseed oil inclusion in sea bream diets: Effect on fatty acid composition during ice storage
Authors: Castro Pedro L. , Caballero María J. , Millán Rafael , Ginés Rafael , Montero Daniel , Izquierdo Marisol 
Published: May 2010

AbstractImpact on proximate and fatty acids patterns of partial and complete dietary replacement of fish oil (FO) by linseed oil (LO) within on‐growing period was evaluated on marketable‐size gilthead sea bream (Sparus aurata) during 17 days of ice storage. The practical diets were factorially designed as follows: 100% FO (FO), 70% LO + 30% LO (70LO) and 100% LO (100LO). On day 0 of ice storage, there were no significant differences in proximate composition among different treatments. Fish fed FO diet showed high saturated, monounsatured and highly unsaturated fatty acids proportions, whereas fillets from fish fed LO diets increased in 18:3n‐3 content and consequently n‐3 polyunsaturated content. Furthermore, fillet from fish fed FO diets had the highest n‐3/n‐6 ratio. Throughout ice storage no significant fatty acid losses were found, with fish fed LO diets maintaining the highest 18:3n‐3 levels.
Production of lipid from N‐acetylglucosamine by Cryptococcus curvatus
Authors: Wu Siguo , Hu Cuimin , Zhao Xin , Zhao Zongbao K. 
Published: May 2010

AbstractN‐Acetylglucosamine (GlcNAc), the monomeric constituent of chitin, is rarely used as a carbon source for fermentation technology. In this study, we demonstrate that the oleaginous yeast Cryptococcus curvatus ATCC 20509 can produce intracellular lipid during the cultivation process and total lipid content can reach 54% on a GlcNAc‐based medium. Culture of C. curvatus under various conditions indicated that lipid accumulation also occurred at a relatively broad range of temperatures as well as relatively high initial GlcNAc concentrations. Fatty acid analysis indicated that the product was rich in palmitic acid, stearic acid, and oleic acid, closely resembling the composition of palm oil. More importantly, the lipid sample produced at 22 °C had a total saturated fatty acid content of 54.2 wt%, suggesting that it may be explored as cocoa‐butter equivalent. Our data suggested that GlcNAc could be used as a feedstock for industrial biotechnology and that C. curvatus ATCC 20509 is a strain capable of accumulating high intracellular lipid using this nitrogen‐rich renewable material.Practical applications: Microbial lipid is a versatile material, especially for biodiesel production. Stable and abundant renewable raw substrates remain to be explored for large‐scale production of microbial lipid. The present work reports lipid production using N‐acetylglucosamine (GlcNAc) by the oleaginous yeast Cryptococcus curvatus ATCC 20509 to yield up to 54% intracellular lipid content. More significantly, the lipid sample produced at 22 °C had a total saturated fatty acid content of 54.2 wt%, suggesting that it may be explored as cocoa‐butter equivalent. Our technology provides the opportunity to effectively convert GlcNAc, available from one of the most abundant renewable materials chitin, into lipid. This procedure should prove valuable in terms of renewable energy production as well as environmental pollution control.
Rapid Synthesis of Functionalized Indenes, Triazoles, and Glucocorticoid Receptor Modulators by Sequential Multicatalysis Cascade Reactions
Authors: Ramachary Dhevalapally B. , Mondal Rumpa , Venkaiah Chintalapudi 
Published: May 2010

AbstractA general process for the synthesis of substituted indenes and 1,2,3‐triazoles was achieved for the first time through a multicatalysis cascade reaction of 2‐ethynylbenzaldehydes, CH acids, organic hydrides, and azides in the presence of a catalytic amount of L‐proline/CuI/DIPEA. In this communication, we discovered the utilization of a single copper catalyst for two different reactions and shown synthetic application to the high‐yielding synthesis of glucocorticoid receptor modulators.
Inhibitors of the Large Ribosomal Subunit from Haloarcula marismortui
Authors: Moore Peter B. 
Published: May 2010

AbstractThe crystal structures that have been obtained for 23 different inhibitors bound to the large ribosomal subunit from Haloarcula marismortui are reviewed here. These structures provide important insights into how anti‐ribosomal antibiotics inhibit protein synthesis, how species specificity arises, and the relationship between ribosomal mutations and antibiotic resistance. These structural studies also provide compelling evidence that the conformation of the peptidyl transferase center of the large ribosomal subunit is intrinsically variable, and that conformational equilibria play a role in determining its functional properties.
Sense and significance: a mixed methods examination of meaning making after the loss of one's child
Authors: Lichtenthal Wendy G. , Currier Joseph M. , Neimeyer Robert A. , Keesee Nancy J. 
Published: May 2010

AbstractThe purpose of this mixed methods study was to identify specific themes of meaning making (sense making and benefit finding) among bereaved parents, as well as to examine associations of these themes to the severity of grief symptomatology. A sample of 156 bereaved parents responded in writing to open‐ended questions about sense making and benefit finding. We assessed normative grief symptoms with the Core Bereavement Items (Burnett, Middleton, Raphael, & Martinek, 1997) and maladaptive grief symptoms with the Inventory of Complicated Grief (Prigerson et al., 1995). Qualitative analyses revealed 45% of the sample could not make sense of their loss, and 21% could not identify benefits related to their loss experience. These parents had more severe normative and maladaptive grief symptoms. Overall, parents discussed 32 distinct approaches to finding meaning in their child's death, 14 of which involved sense making, and 18 involved themes of benefit finding. The most common sense‐making themes involved spirituality and religious beliefs, and the most common benefit‐finding themes entailed an increase in the desire to help and compassion for others' suffering. These results further reinforce the importance of meaning making for many bereaved parents and suggest the utility of developing and evaluating meaning‐centered grief interventions with this population. © 2010 Wiley Periodicals, Inc. J Clin Psychol: 66:1–22, 2010.
Distinguishing anxiety and depression in self‐report: purification of the beck anxiety inventory and beck depression inventory‐II
Authors: Stulz Niklaus , Crits‐Christoph Paul 
Published: May 2010

AbstractThe overlap of symptoms associated with anxiety and depressive disorders hinders their differentiation using self‐report scales. The aim of this study was to develop purified versions of the Beck Anxiety Inventory (BAI) and the Beck Depression Inventory‐II (BDI‐II) that encompass only items highly specific to anxiety and depression, respectively. However, using these purified scales only increased the ability to differentiate anxiety and depressive disorders slightly. Anxiety and depression seem to be inherently linked and, thus, the high comorbidity of anxiety and depressive disorders seems to be not a function of the same types of symptoms being reported for each disorder. Nevertheless, purified BAI and BDI‐II scales might be useful for separating the effects of interventions on anxiety and depressive symptoms. © 2010 Wiley Periodicals, Inc. J Clin Psychol: 66:1–14, 2010.
Reasons for terminating psychotherapy: a general population study
Authors: Westmacott Robin , Hunsley John 
Published: May 2010

AbstractClients' (N=693) reasons for ending psychotherapy and their associations with demographics, mental disorder caseness, and type of mental health care service provider were examined. The most frequently reported reason for termination was feeling better, however, a substantial minority of individuals reported terminating because of treatment dissatisfaction or wanting to solve problems independently. Lower income was associated with lower odds of termination because of feeling better and higher odds of termination because of a perception that therapy was not helping. Meeting criteria for an anxiety disorder, a mood disorder, or substance dependence decreased the odds of termination because of feeling better. These findings provide important information on the challenges to the successful completion of psychotherapy. © 2010 Wiley Periodicals, Inc. J Clin Psychol: 66:1–13, 2010.
Stereoselective synthesis of β‐amino ketones possessing β‐[(2H‐pyran‐2‐one)‐3‐yl]‐β‐chlorovinyl moiety via three‐component direct Mannich‐type reaction, catalyzed with ZrOCl2·8H2O
Authors: Shahrisa Aziz , Zirak Maryam 
Published: May 2010

Abstract
magnified image New Z‐3‐chloro‐3‐(4‐chloro‐6‐methyl‐2‐oxo‐2H‐pyran‐3‐yl)acrolein was synthesized starting from dehydroacetic acid using Vilsmeier–Haack reaction and efficiently used in three component direct Mannich‐type reaction with different anilines, cyclic and acyclic ketones catalyzed with zirconium oxychloride (ZrOCl2·8H2O) in ethanol at room temperature. Also, comenic aldehyde was used in direct Mannich‐type reaction at the same conditions. The reaction proceeds rapidly and affords the corresponding β‐amino ketones in good to high yields with moderate to high stereoselectivity. J. Heterocyclic Chem., (2010).
Solvent‐free synthesis of monastrol derivatives catalyzed by NaHSO4
Authors: Cheng Qingfang , Wang Qifa , Xu Xingyou , Ruan Mingjie , Yao Hailun , Yang Xujie 
Published: May 2010

Abstract
magnified image Monastrol derivatives were synthesized by environment‐friendly three component condensation reaction of salicylaldehyde analogues, β‐ketoester, and urea or thiourea under solvent‐free conditions with NaHSO4 as catalyst in high yields. The reactions formed two different monastrol products, 4‐(2‐hydroxyphenyl)pyrimidines 4 and 9‐ methyl‐ 11‐oxo(or thioxo)‐8‐oxa‐10,12‐diazatricyclotrideca derivatives 5. J. Heterocyclic Chem., (2010).
On the reaction of 3‐cyanochromones with phenyl‐ and methylhydrazines: Structural revision and a simple synthesis of chromeno[4,3‐c]pyrazol‐4‐ones
Authors: Sosnovskikh Vyacheslav Ya. , Moshkin Vladimir S. , Kodess Mikhail I. 
Published: May 2010

Abstract
magnified image Reactions of 3‐cyanochromones with phenylhydrazine gave the corresponding 5‐amino‐4‐salicyloyl‐1‐phenylpyrazoles, 2‐aminochromone‐3‐carbaldehyde N‐phenylhydrazones, and 1‐phenylchromeno[4,3‐c]pyrazol‐4(1H)‐one, depending on the reaction conditions. With methylhydrazine, 3‐(2‐hydroxyaryl)‐1‐methylpyrazole‐4‐carbonitriles and 2‐methylchromeno[4,3‐c]pyrazol‐4(2H)‐ones were obtained in moderate to high yields. J. Heterocyclic Chem., (2010).
Novel tetracyclic imidazole derivatives: Synthesis, dynamic NMR study, and anti‐inflammatory evaluation
Authors: Rupčić Renata , Modrić Marina , Hutinec Antun , Čikoš Ana , Stanić Barbara , Mesić Milan , Pešić Dijana , Merćep Mladen 
Published: May 2010

Abstractmagnified imageA series of tetracyclic imidazole derivatives9a,9b,9c,9d,9e,9f,9g,9h,9i,9j,9k,9l,9m,9n,9o,9p,9r,9s,9t,9vand10a,10b,10c,10d,10e,10f,10g,10hare prepared by multistep route starting from the known tricyclic diketones2a,2b,2c,2d. Intermediary dibenzooxepin[4,5‐d]imidazoles (3a,3c) and dibenzothiepin[4,5‐d]imidazoles (3b,3d) areN‐protected to4e,4fand to the isomeric compounds5a,5band6a,6b. The isomeric compounds5and6are separated. Compounds4,5,and6are formylated at C(2) to afford7a,7b,7c,7d,7e,7f,7g,7h,7i,7j. In the last steps, aldehyde group is reduced, then alkylated to the two sets of isomeric ω‐dimethylaminoalkyl derivatives9a,9b,9c,9d,9e,9f,9g,9h,9i,9j,9k,9l,9m,9n,9o,9p,9r,9s,9t,9v.N‐deprotection of9i–9vled to the compounds10a,10b,10c,10d,10e,10f,10g,10h. Assignment of thesyn/antistructure to5aand6awas supported by 1D selective ROESY NMR spectra, whereas conformational mobility for the selected representatives8aand8bis studied by dynamic NMR. Activation energies (energy barriers for interconversion) are determined to be ∼11.5 and 16.2 kcal/mol, respectively. A series of derivatives9and10were testedin vitrofor their anti‐inflammatory activity. J. Heterocyclic Chem., (2010).
Mild and efficient oxidative aromatization of 4‐substituted‐1,4‐dihydropyrimidines using (diacetoxyiodo)benzene
Authors: Karade Nandkishor N. , Gampawar Sumit V. , Tale Nilesh P. , Kedar Sanjay B. 
Published: May 2010

Abstract
magnified image 4‐Alkyl or aryl‐1,4‐dihydropyrimidines were readily oxidized by (diacetoxyiodo)benzene under mild reaction conditions to the corresponding pyrimidine derivatives in good to excellent yields. J. Heterocyclic Chem., (2010).
Functionalization of MWNTs with Hyperbranched PEI for Highly Selective Isolation of BSA
Authors: Chen Mei‐Ling , Chen Ming‐Li , Chen Xu‐Wei , Wang Jian‐Hua 
Published: May 2010

AbstractCationic hyperbranched BPEI was immobilized on the surface of MWNTs via electrostatic interactions between the positively charged protonated amines within the polymer and the carboxyl groups on the chemically oxidized MWNT surface. The functionalized BPEI‐MWNTs were characterized by FT‐IR, TGA, TEM and surface charge analysis, and it was used as a bio‐sorbent for the adsorption of proteins. CD spectra showed no conformational change of BSA during the adsorption/desorption process. A dynamic adsorption capacity of 167 mg · g−1 for BSA was achieved. With a sample volume of 2.0 mL, an enrichment factor of 10 was obtained along with an adsorption efficiency of 100%, a recovery of 100%, a sampling frequency of 10 h−1 and a RSD of 2.6% at 25 µg · mL−1 BSA.magnified image
Synthesis and Self‐Assembly of New Double‐Crystalline Amphiphilic Polyethylene‐block‐Poly[oligo(ethylene glycol) Methyl Ether Methacrylate] Coil‐Brush Diblock Copolymer
Authors: Wang Wanjuan , Liu Ran , Li Zhiyun , Meng Chunfeng , Wu Qing , Zhu Fangming 
Published: May 2010

AbstractWe report on the synthesis and self‐assembly of a novel well‐defined coil‐brush diblock copolymer with linear crystalline polyethylene (PE) as the coil block and hydrophilic poly [oligo(ethylene glycol) methyl ether methacrylate] (POEGMA) as rod brush via a combination of chain shuttling ethylene polymerization (CSEP) and atom transfer radical polymerization (ATRP). Initially, bromine end‐terminated PE macroinitiator (PE–Br) was synthesized through the esterification of 2‐bromo‐2‐methylpropionyl bromide with monohydroxyl‐terminated PE (PE–OH) which was prepared by means of CSEP with 2,6‐bis[1‐(2,6‐dimethylphenyl)imino ethyl] pyridine iron (II) dichloride/methylaluminoxane (MAO)/ZnEt2 and subsequent in situ oxidation with oxygen. The resultant PE‐b‐POEGMA coil‐brush diblock copolymer was synthesized by ATRP of monomethoxy‐capped oligo(ethylene glycol)methacrylate (OEGMA) using PE–Br as macroinitiator. The self‐assembly of the double‐crystalline PE‐b‐POEGMA in aqueous solution was investigated by dynamic light scattering, transmission electron microscopy and cryofield emission scanning electron microscopy. It was found that, in water, a solvent selectively good for the POEGMA brush, PE‐b‐POEGMA chains could self‐assemble to form sandwich‐like micelles with the insoluble and crystallized PE blocks as the interlayer cores and the soluble and swollen POEGMA brush as the outer‐layer shell. The crystallization of both PE and POEGMA blocks in self‐assembled structure formed from aqueous solution was investigated by differential scanning calorimetry.magnified image
pH‐Responsive Polymers as Gene Carriers
Authors: Park In‐Kyu , Singha Kaushik , Arote Rohidas B. , Choi Yun‐Jaie , Kim Won Jong , Cho Chong‐Su 
Published: May 2010

AbstractDespite the immense potential of non‐viral delivery system in gene therapy its application has been impaired greatly by various impediments having contrasting traits. Therefore it is an absolute necessity to develop some non‐viral vectors which are endowed with special characteristics to act differently in intracellular as well as extracellular compartments to surmount these inter‐conflicting hurdles. Such smart polymers should serve some specific purposes by adjusting their structural or functional traits under the influence of stimuli such as temperature, light, salt concentration or pH. Among all these stimuli‐responsive polymers pH‐responsive polymers have attracted major attention and great impetus has been directed towards utilizing the subtle yet significant change in pH value within the cellular compartments. This review is intended to provide a comprehensive account of the development of pH‐responsive polymeric vectors based on their structural features and consequent functional attributes to achieve efficient transfection. The underlying modes of actions relating to structure and differential pH environment have also been discussed in this review.magnified image
Metal–Ligand‐Containing Polymers: Terpyridine as the Supramolecular Unit
Authors: Shunmugam Raja , Gabriel Gregory J. , Aamer Khaled A. , Tew Gregory N. 
Published: May 2010

AbstractNew and interesting properties can be obtained from macromolecular architectures functionalized with supramolecular moieties, particularly metal–ligand complexes. Self‐assembly, based on the selective control of noncovalent interactions, guides the creation of hierarchically ordered materials providing access to novel structures and new properties. This field has expanded significantly in the last two decades, and one of the most ubiquitous functionalities is terpyridine. Despite its wide‐spread use, much basic knowledge regarding the binding of terpyridine with metal ions remains unknown. Here, the binding constants of PEG‐substituted terpyridine in relation to other literature reports are studied and a few examples of supramolecular materials from our laboratory are summarized.magnified image
Ultra Rapid Approaches to Mild Macromolecular Conjugation
Authors: Inglis Andrew J. , Barner‐Kowollik Christopher 
Published: May 2010

AbstractIn light of the increasing demand for ultra rapid and mild conjugation chemistries for use in macromolecular chemistry, the present Feature Article provides a critical overview of the very latest developments in this field. The principal aim, therefore, is the provision of a quick selection guide to aid in the formulation of a design strategy for novel functional materials and to provide recommendations for future developments in the chemistries discussed.magnified image
Synthesis of New Pyridazine‐Based Monomers and Related Polymers for Photovoltaic Applications
Authors: Gendron David , Morin Pierre‐Olivier , Najari Ahmed , Leclerc Mario 
Published: May 2010

AbstractNew aromatic compounds with a pyridazine core have been synthesized. Four electron‐withdrawing monomers have been easily prepared from simple condensation reactions and ring closure procedures. Optimized HOMO, LUMO, and bandgap energy levels have been obtained. The resulting conjugated polymers have been tested in organic solar cells. First studies have revealed power conversion efficiencies up to 0.5% for an active area of 1.0 cm2.
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An Alternating Copolymer Derived from Indolo[3,2‐b]carbazole and 4,7‐Di(thieno[3,2‐b]thien‐2‐yl)‐2,1,3‐benzothiadiazole for Photovoltaic Cells
Authors: Xia Yangjun , Su Xuehua , He Zhicai , Ren Xia , Wu Hongbing , Cao Yong , Fan Duowang 
Published: May 2010

AbstractAn alternating narrow bandgap conjugated copolymer (PICZ‐DTBT, Eg = 1.83 eV) derived from 5,11‐di(9‐heptadecanyl)indolo[3,2‐b]carbazole and 4,7‐di(thieno[3,2‐b]thien‐2‐yl)‐2,1,3‐benzothiadiazole (DTBT), was prepared by the palladium‐catalyzed Suzuki coupling reaction. The resultant polymer absorbs light from 350–690 nm, exhibits two absorbance peaks at around 420 and 570 nm and has good solution processibility and thermal stability. The highest occupied molecular orbital (HOMO) energy level and lowest unoccupied molecular orbital (LUMO) level of the copolymer determined by cyclic voltammetry were about −5.18 and −3.35 eV, respectively. Prototype bulk heterojunction photovoltaic cells from solid‐state composite films based on PICZ‐DTBT and [6,6]‐phenyl‐C71 butyric acid methyl ester (PC71BM), show power conversion efficiencies up to 2.4% under 80 mW · cm−2 illumination (AM1.5) with an open‐circuit voltage of Voc = 0.75 V, a short current density of Jsc = 6.02 mA · cm−2, and a fill factor of 42%. This indicates that the copolymer PICZ‐DTBT is a viable electron donor material for polymeric solar cells.magnified image
13. Nachwuchswissenschaftler‐Symposium Bioorganische Chemie
Authors: Christmann Mathias 
Published: May 2010

AbstractMitte September 2004 nutzten im Fachbereich Chemie der Universität Hamburg 70 Teilnehmer aus Hochschule und Industrie das 13. Nachwuchswissenschaftler‐Symposium Bioorganische Chemie als Plattform zum Gedankenaustausch. Das Programm der Veranstalter Rolf Breinbauer, Wolfgang Maison und Mathias Christmann umfasste 29 Beiträge. Im Mittelpunkt stand die Modulation biologischer Prozesse durch kleine Moleküle. Ermöglicht wurde das Symposium durch die Unterstützung einzelner Chemieunternehmen und des Fonds.
Tag der Organischen Chemie der Universität Stuttgart
Authors: Schöne Niklas , Laschat Sabine 
Published: May 2010

AbstractMitte Oktober 2004 fand zum neunten Mal der Tag der Organischen Chemie der Universität Stuttgart statt: Doktoranden der Universitäten Stuttgart, Tübingen, Karlsruhe, Heidelberg und Ulm präsentierten ihre Forschungsergebnisse einem breiten Publikum aus Hochschule und Industrie. Elf Kurzvorträgen spannten einen thematisch weiten Bogen von der Materialwissenschaft über die Katalyse bis hin zu Reaktionsmechanismen und Naturstoffsynthesen.
Symposium für Theoretische Chemie in Suhl
Authors: Kirchner Barbara , Reiher Markus 
Published: May 2010

AbstractMitte September 2004 fanden über 200 Teilnehmer den Weg nach Suhl/Thüringen, um sich auf dem Symposium für Theoretische Chemie (STC 2004) über Entwicklungen ihres Fachs zu informieren. Die von Gernot Frenking und Max Holthausen (Marburg) organisierte Veranstaltung mit 13 Haupt‐ und 19 Kurzvorträgen stand im Zeichen von „Computational Chemistry”︁. Englisch war wie in den Jahren zuvor Tagungssprache, um so die Anknüpfung an die internationale Community zu intensivieren. Dementsprechend kamen die Vortragenden nicht allein aus dem Einzugsbereich der Arbeitsgemeinschaft Theoretische Chemie, sondern auch aus den Benelux‐Ländern, England, USA, Südafrika, Skandinavien und Indien.
50 Jahre Mitgliedschaft in der CG/GDCh ‐ Wir gratulieren!
Authors: Hopf Henning , Koch Wolfram 
Published: May 2010

AbstractIm Jahre 2005 begehen die im folgenden genannten Kolleginnen und Kollegen das goldene Jubiläum ihrer GDCh‐Mitgliedschaft oder blicken in den neuen Bundesländern auf eine 50‐jährige Mitgliedschaft in der Chemischen Gesellschaft der DDR und nach der Wiedervereinigung in der GDCh zurück