bluuebunny/crossref_metadata_2025_split huggingface dataset:
Selective Nascent Polymer Catch‐and‐Release Enables Scalable Isolation of Multi‐Kilobase Single‐Stranded DNA
Authors: Krieg Elisha , Shih William M. 
Published: December 2017

AbstractScalable methods currently are lacking for isolation of long ssDNA, an important material for numerous biotechnological applications. Conventional biomolecule purification strategies achieve target capture using solid supports, which are limited in scale and susceptible to contamination owing to nonspecific adsorption and desorption on the substrate surface. We herein disclose selective nascent polymer catch and release (SNAPCAR), a method that utilizes the reactivity of growing poly(acrylamide‐co‐acrylate) chains to capture acrylamide‐labeled molecules in free solution. The copolymer acts as a stimuli‐responsive anchor that can be precipitated on demand to pull down the target from solution. SNAPCAR enabled scalable isolation of multi‐kilobase ssDNA with high purity and 50–70 % yield. The ssDNA products were used to fold various DNA origami. SNAPCAR‐produced ssDNA will expand the scope of applications in nanotechnology, gene editing, and DNA library construction.
Structure Re‐determination and Superconductivity Observation of Bulk 1T MoS2
Authors: Fang Yuqiang , Pan Jie , He Jianqiao , Luo Ruichun , Wang Dong , Che Xiangli , Bu Kejun , Zhao Wei , Liu Pan , Mu Gang , Zhang Hui , Lin Tianquan , Huang Fuqiang 
Published: December 2017

Abstract2H MoS2 has been intensively studied because of its layer‐dependent electronic structures and novel physical properties. Though the metastable 1T MoS2 with a [MoS6] octahedron was observed over the microscopic area, the true crystal structure of 1T phase has not been strictly determined. Moreover, the true physical properties have not been demonstrated from experiments owing to the challenge for the preparation of pure 1T MoS2 crystals. 1T MoS2 single crystals were successfully synthesized and the crystal structure of 1T MoS2 re‐determined from single‐crystal X‐ray diffraction. 1T MoS2 crystallizes in the space group P
m1 with a cell of a=b=3.190(3) Å and c=5.945(6) Å. The individual MoS2 layer consists of MoS6 octahedra sharing edges with each other. More surprisingly, the bulk 1T MoS2 crystals undergo a superconducting transition of Tc=4 K, which is the first observation of superconductivity in pure 1T MoS2 phase.
Cross‐Coupling of Sodium Sulfinates with Aryl, Heteroaryl, and Vinyl Halides by Nickel/Photoredox Dual Catalysis
Authors: Yue Huifeng , Zhu Chen , Rueping Magnus 
Published: December 2017

AbstractAn efficient photoredox/nickel catalyzed sulfonylation reaction of aryl, heteroaryl, and vinyl halides has been achieved for the first time. This newly developed sulfonylation protocol provides a versatile method for the synthesis of diverse aromatic sulfones at room temperature and shows excellent functional group tolerance. The electrophilic coupling partners are not limited to aryl, heteroaryl, and vinyl bromides and iodides, but also includes less reactive aryl chlorides as suitable substrates for this transformation.
Esmaeilzadeh–Roshanfekr equation of state coupled with CPA model: Application in viscosity modeling
Authors: Bakhtyari Ali , Makarem Mohammad Amin , Esmaeilzadeh Feridun 
Published: December 2017

AbstractThe present study aims to evaluate the performance of the cubic plus association model for the estimation of physical properties of associating fluids. In this regard, this model with different physical terms was evaluated. Soave–Redlich–Kwong, Peng–Robinson, Patel–Teja, and Esmaeilzadeh–Roshanfekr cubic equations were utilized as the physical contribution in the model. This was the first study to evaluate 3‐parameter equations such as Patel–Teja and Esmaeilzadeh–Roshanfekr. Experimental vapor pressure and saturated liquid molar densities were employed to obtain the parameters of pure components. All the models were capable of representing the data. However, new cubic plus association equations of states showed better performance due to the presence of an additional fitting parameter. These parameters were then used to calculate liquid viscosity data of associating fluids in a broad range of temperature and pressure. Free volume and friction theories were applied for this purpose. All the models were successful in estimation of viscosity data. However, friction models managed to obtain less error. Maximum observed error, which was less than 5%, was obtained in estimation of ethylene glycol viscosity by the free volume theory. Consequently, cubic plus association models with different physical terms can precisely estimate physical properties of highly associating fluids. Besides, the application of 3‐parameter equations for the physical contribution leads to better estimations in both saturated liquid densities and liquid viscosities.
Effect of resveratrol and pterostilbene on aging and longevity
Authors: Li Yi‐Rong , Li Shiming , Lin Chi‐Chien 
Published: December 2017

AbstractOver the past years, several studies have found that foods rich in polyphenols protect against age‐related disease, such as atherosclerosis, cardiovascular disease, cancer, arthritis, cataracts, osteoporosis, type 2 diabetes (T2D), hypertension and Alzheimer's disease. Resveratrol and pterostilbene, the polyphenol found in grape and blueberries, have beneficial effects as anti‐aging compounds through modulating the hallmarks of aging, including oxidative damage, inflammation, telomere attrition and cell senescence. In this review, we discuss the relationship between resveratrol and pterostilbene and possible aging biomarker, including oxidative stress, inflammation, and high‐calorie diets. Moreover, we also discuss the positive effect of resveratrol and pterostilbene on lifespan, aged‐related disease, and health maintenance. Furthermore, we summarize a variety of important mechanisms modulated by resveratrol and pterostilbene possibly involved in attenuating age‐associated disorders. Overall, we describe resveratrol and pterostilbene potential for prevention or treatment of several age‐related diseases by modulating age‐related mechanisms. © 2017 BioFactors, 44(1):69–82, 2018
Acute lymphoblastic leukemia secondary to myeloproliferative neoplasms or after lenalidomide exposure
Authors: Alhuraiji Ahmad , Naqvi Kiran , Huh Yang O. , Ho Coty , Verstovsek Srdan , Bose Prithviraj 
Published: December 2017

Key Clinical MessagePhiladelphia‐negative (Ph−) myeloproliferative neoplasms (MPN) do rarely transform to acute lymphoblastic leukemia (ALL). While causality is difficult to establish, a few cases of ALL arising after exposure to lenalidomide for registered indications (multiple myeloma, myelodysplastic syndrome with 5q deletion) have been described in the literature.
Differential Modulating Effect of MoS2 on Amyloid Peptide Assemblies
Authors: Wang Jie , Liu Lei , Ge Daohan , Zhang Hongxing , Feng Yonghai , Zhang Yibang , Chen Menglin , Dong Mingdong 
Published: December 2017

AbstractThe abnormal fibrillogenesis of amyloid peptides such as amyloid fibril and senior amyloid plaques, is associated with the pathogenesis of many amyloid diseases. Hence, modulation of amyloid assemblies is related to the possible pathogenesis of some diseases. Some two‐dimensional nanomaterials, that is, graphene oxide, tungsten disulfide, exhibit strong modulation effects on the amyloid fibrillogenesis. Herein, the modulation effect of molybdenum disulfide on two amyloid peptide assemblies based on the label‐free techniques is presented, including quartz crystal microbalance (QCM), AFM, and CD spectroscopy. MoS2 presents different modulating effects on the assembly of amyloid‐β peptide (33–42) [Aβ (33–42)] and amylin (20–29), mainly owing to the distinct affinity between amyloid peptides and MoS2. This is to our knowledge the first report of MoS2 as a modulator for amyloid aggregation. It enriches the variety of 2D nanomodulators of amyloid fibrillogenesis and explains the mechanism for the self‐assembly of amyloid peptides, and expands the applications of MoS2 in biology.
Enantioselective recognition of carboxylic acids by novel fluorescent triazine‐based thiazoles
Authors: Halay Erkan , Bozkurt Selahattin 
Published: December 2017

AbstractHydrogen bonding and π‐π interactions take special part in the enantioselectivity task. In this regard, because of having both hydrogen acceptor and hydrogen donor groups, melamine derivatives become more of an issue for enantioselectivity. In the light of such information, triazine‐based chiral, fluorescence active novel thiazole derivatives L1 and L2 were designed and synthesized from (S)‐(−)‐2‐amino‐1‐butanol and (1S,2R)‐(+)‐2‐amino‐1,2‐diphenylethanol. The structural establishment of these compounds was made by spectroscopic methods such as FTIR, 1H, and 13C NMR. While the solution of these compounds in DMSO did not show any fluorescence emission, it was observed that the emission increased 44‐fold for L1 and 55‐fold for L2 in 95% water, similar to the aggregation‐induced emission (AIE) characterized compounds. In this regard, enantioselective capabilities of these compounds against carboxylic acids were tested, and in experiments carried out at a ratio of 40/60 DMSO/H2O, it was determined that R‐2ClMA increased the fluorescence emission of L1 chiral receptor by 2.59 times compared to S‐isomer.
Exploring Structure–Activity Relationships with Three‐Dimensional Matched Molecular Pairs—A Review
Authors: Ehmki Emanuel S. R. , Rarey Matthias 
Published: December 2017

AbstractA matched molecular pair (MMP) consists of two small molecules that differ by a few atoms only. The minor structural difference between the molecules allows a detailed analysis of changes in properties. Three‐dimensional (3D) MMPs extend the concept of chemical similarity by spatial similarity. Conformations must be generated, and superimpositions have to be calculated. The additional complexity and uncertainty as well as the smaller amount of available experimental data substantially complicates the derivation of models. Nonetheless, there are some benefits that make the transition worthwhile. The 3D concept gives detailed insight into mechanisms behind several methods classically used by the 2D MMP approach. It can help to analyze disrupted series of structure–activity relationships or extend the 2D MMP concept with scaffold hopping. One of the most powerful features is the high confidence structure–activity relationship transfer between series of analogues. Several research groups have approached the problem from different directions. The models vary especially in the 3D similarity measure used and complexity of the applied descriptor selected or designed. Nonetheless, all approaches have increased the amount of information available by incorporating 3D structural information.
Improving bone health in men with prostate cancer receiving androgen deprivation therapy: Results of a randomized phase 2 trial
Authors: Alibhai Shabbir M.H. , Breunis Henriette , Timilshina Narhari , Hamidi Maryam S. , Cheung Angela M. , Tomlinson George A. , Manokumar Tharsika , Samadi Osai , Sandoval Joanna , Durbano Sara , Warde Padraig , Jones Jennifer M. 
Published: December 2017

BACKGROUNDStrategies to improve bone health care in men receiving androgen deprivation therapy (ADT) are not consistently implemented. The authors conducted a phase 2 randomized controlled trial of 2 education‐based models‐of‐care interventions to determine their feasibility and ability to improve bone health care.METHODSA single‐center parallel‐group randomized controlled trial of men with prostate cancer who were receiving ADT was performed. Participants were randomized 1:1:1 to 1) a patient bone health pamphlet and brief recommendations for their family physician (BHP+FP); 2) a BHP and support from a bone health care coordinator (BHP+BHCC); or 3) usual care. The primary efficacy outcome was receipt of a bone mineral density (BMD) test within 6 months. Secondary efficacy outcomes included guideline‐appropriate calcium and vitamin D use and bisphosphonate prescriptions for men at high fracture risk. Feasibility endpoints included recruitment, retention, satisfaction, contamination, and outcome capture. The main analysis used logistic regression with a 1‐sided P of .10. The trial is registered at ClinicalTrials.gov (identifier NCT02043236).RESULTSA total of 119 men were recruited. The BHP+BHCC strategy was associated with a greater percentage of men undergoing a BMD test compared with the usual‐care group (78% vs 36%; P<.001). BMD ordering also was found to be increased with the BHP+FP strategy (58% vs 36%; P = .047). Both strategies were associated with higher percentages of patients using calcium and vitamin D, but only the BHP+FP arm was statistically significant (P = .039). No men were detected to be at high fracture risk. All but one feasibility endpoint was met.CONCLUSIONSEducational strategies to improve bone health care appear feasible and are associated with improved BMD ordering in men receiving ADT. Cancer 2018;124:1132‐40. © 2017 American Cancer Society.
Facile One‐Pot Synthesis of Activated Porous Biocarbons with a High Nitrogen Content for CO2 Capture
Authors: Singh Mr. Gurwinder , Lakhi Kripal S. , Park Dae‐Hwan , Srivastava Prashant , Naidu Ravi , Vinu Ajayan 
Published: December 2017

AbstractA facile one‐pot synthesis of porous activated biocarbons with a high nitrogen content (NEPBs) through a simple in‐situ self‐assembly of Arundo donax and urea combined with a solid state activation using KOH/ZnCl2 is presented. NEPBs show dominant microporous character and possess a high nitrogen content in the form of pyridinic‐N and pyrrolic‐N and a high specific surface area. The nitrogen content of NEPBs was determined to be in the range of 7.74–19.15%, which was much higher than that of biocarbon derived from non‐activated biomass (1.12%). We also demonstrate that the nitrogen content of NEPBs can easily be tuned by adjusting the impregnation ratios of urea and KOH/ZnCl2. The NEPBs show impressively high CO2 adsorption capacities of 4.8 mmol g−1 at 0 °C/1 bar and 14.1 mmol g−1 at 0 °C/30 bar. A high value of the isosteric heat of adsorption is observed (39 kJ mol−1), confirming the role of nitrogen to enhance the CO2 adsorption capacities through a strong adsorbent‐adsorbate interaction. It is anticipated that the strategy presented here could be extended for the generation of a series of other biomass‐based porous carbon materials with much higher nitrogen contents and controlled textural properties for applications including energy storage and conversion and carbon capture.
A PSO‐based task scheduling algorithm improved using a load‐balancing technique for the cloud computing environment
Authors: Ebadifard Fatemeh , Babamir Seyed Morteza 
Published: December 2017

SummaryDynamic on‐demand resource provisioning is one of the primary goals of the cloud computing task scheduling process. Task scheduling is a nondeterministic polynomial time (NP)‐hard problem and is responsible for assigning tasks to virtual machines (VMs) in a way that increases the resource utilization and performance, reduces response time, and keeps the whole system balanced. In this paper, we present a static task scheduling method based on the particle swarm optimization (PSO) algorithm where the tasks are assumed to be non‐preemptive and independent. We have improved the performance of the basic PSO method using a load‐balancing technique. We have compared our proposed method with round robin (RR) task scheduling, improved PSO task scheduling and a load‐balancing technique. The simulation results show that our method outperforms these algorithms by an increase of resource utilization of 22% and a decrease of makespan by 33%, compared with the basic PSO algorithm. The results illustrate that our proposed method converges to the near optimal solution faster than the basic PSO algorithm and is more efficacious with more tasks.
Growth at Room Temperature and Investigation of Physicochemical Characteristics of New Semi‐Organic BaxCa1‐xC4H4O4 (x = 0.2, 04, 0.5, 0.6 and 0.8) Crystals
Authors: Christy D. S. , Mahadevan C. K. , Sahaya Shajan X. 
Published: December 2017

AbstractSemi‐organic single crystals of barium ‐ calcium succinate have been grown by the slow evaporation solution growth technique for the first time with reasonable size. It illustrate like a routine growth methodologies and characterization but many applications demand crystals with greater flexibility and it can able to control and alter the properties of the single crystal. One of the useful approaches is to prepare hybrid crystals, their properties are different from the single component crystals. In this context the present work is considered. Crystal structure, chemical composition and thermal stability of the five grown crystals have been determined by carrying out single crystal X‐ray diffraction, FTIR spectroscopic, atomic absorption spectroscopic and thermogravimetric analyses. The grown crystals have been characterized optically, mechanically and electrically by carrying out optical transmittance, photoluminescence, second harmonic generation efficiency, microhardness and electrical (both AC and DC) measurements. Results obtained in the present study indicate the possibility of growing single phased mixed crystals with the end members being non‐isomorphous and with tuned thermal, optical, mechanical and electrical properties.
Morphology‐Controlled Preparation of α‐Calcium Sulfate Hemihydrate from Phosphogypsum by Semi‐Liquid Method
Authors: Mi Yang , Chen Deyu , He Yulong , Wang Shuzhou 
Published: December 2017

AbstractPhosphogypsum (PG), a by‐product of phosphoric acid industry, causes environmental issues. In this paper, PG was effectively transformed into alpha‐calcium sulfate hemihydrate (ɑ‐CSH) via a semi‐liquid method. The phase evolution and the effects of different organic acids and pH values on crystal morphology of the α‐CSH were investigated by SEM, XRD and EDS. The properties of the prepared α‐CSH with different aspect ratio were also compared. The results indicate that PG can be successfully transformed into α‐CSH by the semi‐liquid method at 140 °C for 3.0 h. The morphology of the produced α‐CSH is significantly influenced by the concentrations of organic acid and pH value. α‐CSH crystal with well‐morphology is obtained under the condition of 0.1 wt.% maleic acid and pH = 7.0. The obtained α‐CSH with uniform particle size has the aspect ratio of 1.2. The 2 h and 3 d bending/compressive strengths of the hardened paste prepared from the α‐CSH reach 6.4/20.6 MPa and 10.5/43.7 MPa respectively, which are comparable to those of the commercial α‐CSH. Moreover, the lower aspect ratio of ɑ‐CSH results in more compact microstructure and higher mechanical strengths of the hardened paste.
Efficient Yttrium(III) Chloride‐Treated TiO2 Electron Transfer Layers for Performance‐Improved and Hysteresis‐Less Perovskite Solar Cells
Authors: Li Minghua , Huan Yahuan , Yan Xiaoqin , Kang Zhuo , Guo Yan , Li Yong , Liao Xinqin , Zhang Ruxiao , Zhang Yue 
Published: December 2017

AbstractHybrid organic–inorganic metal halide perovskite solar cells have attracted widespread attention, owing to their high performance, and have undergone rapid development. In perovskite solar cells, the charge transfer layer plays an important role for separating and transferring photogenerated carriers. In this work, an efficient YCl3‐treated TiO2 electron transfer layer (ETL) is used to fabricate perovskite solar cells with enhanced photovoltaic performance and less hysteresis. The YCl3‐treated TiO2 layers bring about an upward shift of the conduction band minimum (ECBM), which results in a better energy level alignment for photogenerated electron transfer and extraction from the perovskite into the TiO2 layer. After optimization, perovskite solar cells based on the YCl3‐treated TiO2 layers achieve a maximum power conversion efficiency of about 19.99 % (19.29 % at forward scan) and a steady‐state power output of about 19.6 %. Steady‐state and time‐resolved photoluminescence measurements and impedance spectroscopy are carried out to investigate the charge transfer and recombination dynamics between the perovskite and the TiO2 electron transfer layer interface. The improved perovskite/TiO2 ETL interface with YCl3 treatment is found to separate and extract photogenerated charge rapidly and suppress recombination effectively, which leads to the improved performance.
Why georeferencing matters: Introducing a practical protocol to prepare species occurrence records for spatial analysis
Authors: Bloom Trevor D. S. , Flower Aquila , DeChaine Eric G. 
Published: December 2017

AbstractSpecies Distribution Models (SDMs) are widely used to understand environmental controls on species’ ranges and to forecast species range shifts in response to climatic changes. The quality of input data is crucial determinant of the model's accuracy. While museum records can be useful sources of presence data for many species, they do not always include accurate geographic coordinates. Therefore, actual locations must be verified through the process of georeferencing. We present a practical, standardized manual georeferencing method (the Spatial Analysis Georeferencing Accuracy (SAGA) protocol) to classify the spatial resolution of museum records specifically for building improved SDMs. We used the high‐elevation plant Saxifraga austromontana Wiegand (Saxifragaceae) as a case study to test the effect of using this protocol when developing an SDM. In MAXENT, we generated and compared SDMs using a comprehensive occurrence dataset that had undergone three different levels of georeferencing: (1) trained using all publicly available herbarium records of the species, minus outliers (2) trained using herbarium records claimed to be previously georeferenced, and (3) trained using herbarium records that we have manually georeferenced to a ≤ 1‐km resolution using the SAGA protocol. Model predictions of suitable habitat for S. austromontana differed greatly depending on georeferencing level. The SDMs fitted with presence locations georeferenced using SAGA outperformed all others. Differences among models were exacerbated for future distribution predictions. Under rapid climate change, accurately forecasting the response of species becomes increasingly important. Failure to georeference location data and cull inaccurate samples leads to erroneous model output, limiting the utility of spatial analyses. We present a simple, standardized georeferencing method to be adopted by curators, ecologists, and modelers to improve the geographic accuracy of museum records and SDM predictions.