bluuebunny/crossref_metadata_2025 huggingface dataset:
From food waste to value‐added surplus products (VASP): Consumer acceptance of a novel food product category
Authors: Bhatt Siddharth , Lee Jeonggyu , Deutsch Jonathan , Ayaz Hasan , Fulton Benjamin , Suri Rajneesh
Published: October 2017

Over one third of the food we produce is never consumed. Such a high rate of food waste is appalling. To address this, researchers have focused on creating foods from surplus ingredients or ingredients obtained during the manufacturing of other foods. We term such foods as value‐added surplus products. But will consumers accept products made from ingredients destined for the trash bin? A series of studies that test 3 different cues that consumers utilize to evaluate foods suggests strong potential for consumer acceptance, and even preference for such foods. Study 1 tested description for value‐added surplus products alongside those for conventional and organic foods to understand whether consumers discriminate between these foods. Study 2 tested consumer preference for 9 product labels for value‐added surplus products. Study 3 examined whether benefits to self or to others will differentially influence consumers' perceptions of such value‐added foods. Collectively, these studies suggest a strong potential for such foods to command position as a new category of foods that is distinct from both conventional as well as organic foods.
Hydrogen‐Borrowing Alcohol Bioamination with Coimmobilized Dehydrogenases
Authors: Böhmer Wesley , Knaus Tanja , Mutti Francesco G.
Published: October 2017

The amination of alcohols is an important transformation in chemistry. The redox‐neutral (i.e., hydrogen‐borrowing) asymmetric amination of alcohols is enabled by the combination of an alcohol dehydrogenase (ADH) with an amine dehydrogenase (AmDH). In this work, we enhanced the efficiency of hydrogen‐borrowing biocatalytic amination by co‐immobilizing both dehydrogenases on controlled porosity glass FeIII ion‐affinity beads. The recyclability of the dual‐enzyme system was demonstrated (5 cycles) with total turnover numbers of >4000 and >1000 for ADH and AmDH, respectively. A set of (S)‐configured alcohol substrates was aminated with up to 95 % conversion and >99 % ee (R). Preparative‐scale amination of (S)‐phenylpropan‐2‐ol resulted in 90 % conversion and 80 % yield of the product in 24 h.
Comparative chemometric analysis for classification of acids and bases via a colorimetric sensor array
Authors: Kangas Michael J. , Burks Raychelle M. , Atwater Jordyn , Lukowicz Rachel M. , Garver Billy , Holmes Andrea E.
Published: October 2017

With the increasing availability of digital imaging devices, colorimetric sensor arrays are rapidly becoming a simple, yet effective tool for the identification and quantification of various analytes. Colorimetric arrays utilize colorimetric data from many colorimetric sensors, with the multidimensional nature of the resulting data necessitating the use of chemometric analysis. Herein, an 8 sensor colorimetric array was used to analyze select acid and basic samples (0.5 – 10 M) to determine which chemometric methods are best suited for classification quantification of analytes within clusters.

PCA, HCA, and LDA were used to visualize the data set. All three methods showed well‐separated clusters for each of the acid or base analytes and moderate separation between analyte concentrations, indicating that the sensor array can be used to identify and quantify samples. Furthermore, PCA could be used to determine which sensors showed the most effective analyte identification. LDA, KNN, and HQI were used for identification of analyte and concentration. HQI and KNN could be used to correctly identify the analytes in all cases, while LDA correctly identified 95 of 96 analytes correctly. Additional studies demonstrated that controlling for solvent and image effects was unnecessary for all chemometric methods utilized in this study.
Bonding Scheme and Optical Properties in BiM2O2(PO4) (M=Cd, Mg, Zn); Experimental and Theoretical Analysis
Authors: Olchowka J. , Mentré O. , Kabbour H. , Colmont M. , Adlung M. , Suta M. , Wickleder C.
Published: October 2017

Luminescence properties of the Bi(M,M′)2PO6 (M=Mg, Zn, Cd) series have been rationalized as a function of the M element using optical spectroscopy, as well as empirical and first principles calculations. The latter yielded indirect band gaps for all compounds with energies between 2.64 and 3.62 eV, whereas luminescence measurements exhibit bright warm white emission luminescence even at room temperature assigned to Bi3+ transitions with, for example, 22.8 % quantum yield for M=Mg. The energies of the excitation maxima are shifted with the covalent character of the Bi−O bond by inductive effects of the neighboring M−O bonds. This is discussed on the basis of empirical and electronic structure calculations. Strikingly, in all the investigated compounds, an excitation process occurring at energies higher than the band gaps is observed, which seems to be intrinsic to the s2→sp electronic transitions of the Bi3+ ions. Concerning the emission process, a direct correlation between the lone pair (LP) activity and the emission energy upon change of the lattice parameters was established governing the LP stereo‐activity in the BiMg2‐xCdxPO6 system. As a result, the possibility for tunable optical properties appears realistic in the Bi2O3‐MO‐X2O5 (X=P, V, As, etc.) systems taking into account the diversity of reported or novel crystal structures that can be designed using well‐established rules of crystal chemistry.
The Synergistic Effect between Triphenylpyrrole Isomers as Donors, Linking Groups, and Acceptors on the Fluorescence Properties of D–π–A Compounds in the Solid State
Authors: Lei Yunxiang , Lai Yueyin , Dong Lichao , Shang Guojun , Cai Zhengxu , Shi Jianbing , Zhi Junge , Li Pengfei , Huang Xiaobo , Tong Bin , Dong Yuping
Published: October 2017

Eight donor–π–acceptor (D–π–A) compounds employing triphenylpyrrole isomers (TPP‐1,2,5 and TPP‐1,3,4) as donors, malononitrile (CN) and 1H‐indene‐1,3(2H)‐dione (CO) as acceptors, pyridone (P) and benzopyran (B) as π‐linking groups were synthesized. The compounds exhibited aggregation‐induced emission and piezochromic properties. Compared with previously reported donors, triphenylpyrroles induced all the compounds to have more remarkable photophysical properties. The compounds containing TPP‐1,2,5 and P moieties displayed stronger fluorescence intensities, shorter emission wavelengths, and more distinct piezochromic properties. However, the same phenomenon was observed in the TPP‐1,3,4‐containing system if B was as π‐linker. Moreover, the CN acceptor endowed the compound to have a relatively strong fluorescent intensity, in which CO induced a relatively long emission wavelength. That is, the photophysical properties of D–π–A compounds can be controlled by adjusting the structure of donor, linker and acceptor.
Electron‐Proton Transfer Mechanism of Excited‐State Hydrogen Transfer in Phenol‐(NH3)n (n=3 and 5)
Authors: Miyazaki Mitsuhiko , Ohara Ryuhei , Dedonder Claude , Jouvet Christophe , Fujii Masaaki
Published: October 2017

Excited‐state hydrogen transfer (ESHT) is responsible for various photochemical processes of aromatics, including photoprotection of nuclear basis. Its mechanism is explained by internal conversion from the aromatic ππ* to πσ* states via conical intersection. This means that the electron is transferred to a diffuse Rydberg‐like σ* orbital apart from proton migration. This picture means the electron and the proton do not move together and the dynamics are different in principle. Here, we have applied picosecond time‐resolved near‐infrared (NIR) and infrared (IR) spectroscopy to the phenol‐(NH3)5 cluster, the benchmark system of ESHT, and monitored the electron transfer and proton motion independently. The electron transfer monitored by the NIR transition rises within 3 ps, while the overall H transfer detected by the IR absorption of NH vibration appears with a lifetime of about 20 ps. This clearly proves that the electron motion and proton migration are decoupled. Such a difference of the time‐evolutions between the NIR absorption and the IR transition has not been detected in a cluster with three ammonia molecules. We will report our full observation together with theoretical calculations of the potential energy surfaces of the ππ* and πσ* states, and will discuss the ESHT mechanism and its cluster size‐dependence between n=3 and 5. It is suggested that the presence and absence of a barrier in the proton transfer coordinate cause the different dynamics.
N‐Doped Carbon Nanofibrous Network Derived from Bacterial Cellulose for the Loading of Pt Nanoparticles for Methanol Oxidation Reaction
Authors: Yuan Fanshu , Huang Yang , Fan Mengmeng , Chen Chuntao , Qian Jieshu , Hao Qingli , Yang Jiazhi , Sun Dongping
Published: October 2017

The large‐scale, low‐cost preparation of Pt‐based catalysts with high activity and durability for the methanol oxidation reaction is still challenging. The key to achieving this aim is finding suitable supporting materials. In this paper, N‐doped carbon nanofibrous networks are prepared by annealing a gel containing two inexpensive and ecofriendly precursors, that is, bacterial cellulose and urea, for the loading of Pt nanoparticles. An undoped analogue is also prepared for comparison. Meanwhile, the effect of the annealing temperature on the performance of the catalysts is evaluated. The results show that the N doping and higher annealing temperature can improve the electron conductivity of the catalyst and provide more active sites for the loading of ultrafine Pt nanoparticles with a narrow size distribution. The best catalyst exhibits a remarkably high electrocatalytic activity (627 mA mg−1), excellent poison tolerance, and high durability. This work demonstrates an ideal Pt supporting material for the methanol oxidation reaction.
Reversible Oxidative Se−Se Coupling of Phosphine Selenides by Ph3Sb(OTf)2
Authors: Poller Maximilian J. , Burford Neil , Karaghiosoff Konstantin
Published: October 2017

Salts of diphosphoniumdiselenide dications ([R3PSeSePR3][OTf]2) have been isolated from reactions of trialkylphosphine selenides with triphenylantimony bistriflate. The redox process is speculated to proceed via a cationic coordination complex [Ph3SbL2][OTf]2 (L=Me3PSe, iPr3PSe), which is also formed in the reaction of [R3PSeSePR3][OTf]2 with Ph3Sb. The observations indicate that the reductive elimination of [R3PSeSePR3]2+ from [Ph3Sb(SePR3)2]2+ is reversible through the oxidative addition of [R3PSeSePR3]2+ to Ph3Sb.
Metabolic Profiling to Elucidate Genetic Elements Due to Salt Stress
Authors: Ahmad Rafiq , Jamil Saman , Shahzad Muhammad , Zörb Christian , Irshad Usman , Khan Nadeem , Younas Muhammad , Khan Sabaz Ali
Published: October 2017

Soil salinity is a prevalent abiotic stress and affects around 20% of the irrigated land worldwide. Saline soil affects plant mineral nutrition and water uptake capacity. Plants adopt several strategies to combat salt stress such as synthesis of compatible solutes, control of ions uptake and transportation, production of enzymes and plant growth hormones, and ions accumulation or exclusion. Moreover, plants can also adapt to salt stress through a change in the whole metabolomics to overcome salt stress over a period of time. Metabolites, such as sugars, for instance, are important targets for mitigation of symptoms of salt stress. In spite of the scientific progress to date, still massive research work is to be done to investigate the actual physiological and molecular mechanism of metabolome and the underlying involved genes associated with salt resistance. In addition, expression, regulation, and function of genes and genetic pathways of metabolites, for example, proline, glycine betaine, abscisic acid, jasmonates, and flavonoids, that lead to the reestablishment of proper cellular ionic and osmotic homeostasis during salt stress, are not yet completely understood. This review presents an overview of past and current research on how plants, especially important crop plants, combat salt stress. Further, an attempt has been made to evaluate the gaps in current research and explore the role of genetic studies involved in metabolomics in order to enhance crop yield of salt‐affected soils in future.
Unravelling the Redox‐catalytic Behavior of Ce4+ Metal–Organic Frameworks by X‐ray Absorption Spectroscopy
Authors: Smolders Simon , Lomachenko Kirill A. , Bueken Bart , Struyf Arnaud , Bugaev Aram L. , Atzori Cesare , Stock Norbert , Lamberti Carlo , Roeffaers Maarten B. J. , De Vos Dirk E.
Published: October 2017

The introduction of Ce4+ as a structural cation has been shown to be a promising route to redox active metal–organic frameworks (MOFs). However, the mechanism by which these MOFs act as redox catalysts remains unclear. Herein, we present a detailed study of the active site in [Ce6O4(OH)4]‐based MOFs such as Ce‐UiO‐66, involved in the aerobic oxidation of benzyl alcohol, chosen as a model redox reaction. X‐ray absorption spectroscopy (XAS) data confirm the reduction of up to one Ce4+ ion per Ce6 cluster with a corresponding outwards radial shift due to the larger radius of the Ce3+ cation, while not compromising the structural integrity of the framework, as evidenced by powder X‐ray diffraction. This unambiguously demonstrates the involvement of the metal node in the catalytic cycle and explains the need for 2,2,6,6‐tetramethyl‐1‐piperidinyloxy (TEMPO) as a redox mediator to bridge the gap between the one‐electron oxidation of the Ce4+/Ce3+ couple and the two‐electron alcohol oxidation. Finally, an improved catalytic system with Ce‐MOF‐808 and TEMPO was developed which outperformed all other tested Ce4+‐MOFs.