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https://www.readbyqxmd.com/read/29342357/diffusion-controlled-epitaxy-of-large-area-coalesced-wse2-monolayers-on-sapphire
#1
Xiaotian Zhang, Tanushree H Choudhury, Mikhail Chubarov, Yu Xiang, Bhakti Jariwala, Fu Zhang, Nasim Alem, Gwo-Ching Wang, Joshua A Robinson, Joan M Redwing
A multi-step diffusion-mediated process was developed to control the nucleation density, size and lateral growth rate of WSe2 domains on c-plane sapphire for the epitaxial growth of large area monolayer films by gas source chemical vapor deposition (CVD). The process consists of an initial nucleation step followed by an annealing period in H2Se to promote surface diffusion of tungsten-containing species to form oriented WSe2 islands with uniform size and controlled density. The growth conditions were then adjusted to suppress further nucleation and laterally grow the WSe2 islands to form a fully coalesced monolayer film in less than one hour...
January 17, 2018: Nano Letters
https://www.readbyqxmd.com/read/29337875/aux-iaa-gene-family-in-plants-molecular-structure-regulation-and-function
#2
REVIEW
Jie Luo, Jing-Jing Zhou, Jin-Zhi Zhang
Auxin plays a crucial role in the diverse cellular and developmental responses of plants across their lifespan. Plants can quickly sense and respond to changes in auxin levels, and these responses involve several major classes of auxin-responsive genes, including the Auxin/Indole-3-Acetic Acid (Aux/IAA) family, the auxin response factor (ARF) family, small auxin upregulated RNA (SAUR), and the auxin-responsive Gretchen Hagen3 (GH3) family. Aux/IAA proteins are short-lived nuclear proteins comprising several highly conserved domains that are encoded by the auxin early response gene family...
January 16, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29337290/threefold-growth-efficiency-improvement-of-silica-nanosprings-by-using-silica-nanosprings-as-a-substrate
#3
Giancarlo Corti, Justin L Brown, Negar Rajabi, Dave N McIlroy
The growth efficiency of one dimension(1D) nanostructures via the vapor-liquid-solid process is commonly attributed to parameters such as precursor vapor pressure, substrate temperature, and the choice of the catalyst. The work presented herein is an investigation of the use of silica nanosprings (SN) as a 3D substrate for improving the growth efficiency of SN themselves. Silica nanosprings are a 1D nanomaterial that form a nonwoven structure with optimal geometric characteristics and surface properties that mitigate collisions between growing nanosprings and ripening of the gold catalyst, which should improve SN yield...
January 16, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29335227/potential-of-yeasts-isolated-from-dry-cured-ham-to-control-ochratoxin-a-production-in-meat-models
#4
Belén Peromingo, Félix Núñez, Alicia Rodríguez, Alberto Alía, María J Andrade
The environmental conditions reached during the ripening of dry-cured meat products favour the proliferation of moulds on their surface. Some of these moulds are hazardous to consumers because of their ability to produce ochratoxin A (OTA). Biocontrol using Debaryomyces hansenii could be a suitable strategy to prevent the growth of ochratoxigenic moulds and OTA accumulation in dry-cured meat products. The aim of this work was to evaluate the ability of two strains of D. hansenii to control the growth and OTA production of Penicillium verrucosum in a meat model under water activities (aw) values commonly reached during the dry-cured meat product ripening...
January 6, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29331459/garlic-allium-sativum-l-fed-to-dairy-cows-does-not-modify-the-cheese-making-properties-of-milk-but-affects-the-color-texture-and-flavor-of-ripened-cheese
#5
Giulia Rossi, Stefano Schiavon, Giovanna Lomolino, Claudio Cipolat-Gotet, Alberto Simonetto, Giovanni Bittante, Franco Tagliapietra
Garlic and garlic components have recently been proposed as ruminal activity modulators to reduce the enteric methane emissions of ruminants, but little is known of their influence on milk coagulation properties, nutrient recovery, cheese yield, and sensorial and rheological characteristics of milk and cheese. The present study assessed the effects of garlic and diallyl sulfide supplements on dry matter intake (DMI), productive performance, milk coagulation properties, cheese yield, milk and cheese sensory profiles, and rheological characteristics...
January 10, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29331145/modelling-the-effect-of-acoustic-waves-on-the-thermodynamics-and-kinetics-of-phase-transformation-in-a-solution-including-mass-transportation
#6
S R Haqshenas, I J Ford, N Saffari
Effects of acoustic waves on a phase transformation in a metastable phase were investigated in our previous work [S. R. Haqshenas, I. J. Ford, and N. Saffari, "Modelling the effect of acoustic waves on nucleation," J. Chem. Phys. 145, 024315 (2016)]. We developed a non-equimolar dividing surface cluster model and employed it to determine the thermodynamics and kinetics of crystallisation induced by an acoustic field in a mass-conserved system. In the present work, we developed a master equation based on a hybrid Szilard-Fokker-Planck model, which accounts for mass transportation due to acoustic waves...
January 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29329843/partial-substitution-of-nacl-by-kcl-and-addition-of-flavor-enhancers-on-probiotic-prato-cheese-a-study-covering-manufacturing-ripening-and-storage-time
#7
Hugo L A Silva, Celso F Balthazar, Erick A Esmerino, Roberto P C Neto, Ramon S Rocha, Jeremias Moraes, Rodrigo N Cavalcanti, Robson M Franco, Maria Inês B Tavares, Jânio S Santos, Daniel Granato, Renata G B Costa, Mônica Q Freitas, Márcia C Silva, Renata S L Raices, C Senaka Ranadheera, Filomena Nazzaro, Amir M Mortazavian, Adriano G Cruz
Cheese is a suitable matrix to deliver probiotic strains but it contains a high amount of sodium. The effect of partial substitution of NaCl by KCl and the addition of flavor enhancers (l-arginine, yeast and oregano extract) on probiotic Prato cheese was investigated after 1, 30, and 60 d of refrigerated storage (immediately after manufacturing, and during ripening and storage). Microbiological (lactic acid bacteria and probiotic Lactobacillus casei 01 counts and survival under gastrointestinal conditions), physicochemical (pH, proteolysis, fatty acids), bioactivity (antioxidant effect and angiotensin I-converting enzyme inhibitory activity), rheological, and water mobility by means of time domain low-field nuclear magnetic resonance were investigated...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29328914/rewiring-of-the-fruit-metabolome-in-tomato-breeding
#8
Guangtao Zhu, Shouchuang Wang, Zejun Huang, Shuaibin Zhang, Qinggang Liao, Chunzhi Zhang, Tao Lin, Mao Qin, Meng Peng, Chenkun Yang, Xue Cao, Xu Han, Xiaoxuan Wang, Esther van der Knaap, Zhonghua Zhang, Xia Cui, Harry Klee, Alisdair R Fernie, Jie Luo, Sanwen Huang
Humans heavily rely on dozens of domesticated plant species that have been further improved through intensive breeding. To evaluate how breeding changed the tomato fruit metabolome, we have generated and analyzed a dataset encompassing genomes, transcriptomes, and metabolomes from hundreds of tomato genotypes. The combined results illustrate how breeding globally altered fruit metabolite content. Selection for alleles of genes associated with larger fruits altered metabolite profiles as a consequence of linkage with nearby genes...
January 11, 2018: Cell
https://www.readbyqxmd.com/read/29328713/egalitarianism-among-bubbles-in-porous-media-an-ostwald-ripening-derived-anticoarsening-phenomenon
#9
Ke Xu, Roger Bonnecaze, Matthew Balhoff
We show that smaller gas bubbles grow at the expense of larger bubbles and all bubbles approach the same surface curvature after long times in porous media. This anticoarsening effect is contrary to typical Ostwald ripening and leads to uniformly sized bubbles in a homogeneous medium. Evolution dynamics of bubble populations were measured, and mathematical models were developed that fit the experimental data well. Ostwald ripening is shown to be the driving mechanism in this anticoarsening phenomenon; however, the relationship between surface curvature and bubble size determined by the pore-throat geometric confinement reverses the ripening direction...
December 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29328537/deracemization-of-a-racemic-compound-using-tailor-made-additives
#10
Ton Engwerda, Pim van Schayik, Henjo Jagtenberg, Hugo Meekes, Floris P J T Rutjes, Elias Vlieg
Viedma ripening is a process that combines abrasive grinding of a slurry of crystals with solution phase racemization, resulting in solid phase deracemization. One of the major disadvantages of Viedma ripening is that the desired compound needs to crystallize as a racemic conglomerate, accounting for only 5-10% of all chiral molecules. In this work, we show that use of a chiral additive causes deracemization under conditions in which the compound normally crystallizes as a racemic compound. Although this concerns a single example, it is envisioned that through this new approach the scope of Viedma ripening can be significantly expanded...
January 12, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29324867/comparative-transcriptome-analysis-reveals-key-genes-potentially-related-to-soluble-sugar-and-organic-acid-accumulation-in-watermelon
#11
Lei Gao, Shengjie Zhao, Xuqiang Lu, Nan He, Hongju Zhu, Junling Dou, Wenge Liu
Soluble sugars and organic acids are important components of fruit flavor and have a strong impact on the overall organoleptic quality of watermelon (Citrullus lanatus) fruit. Several studies have analyzed the expression levels of the genes related to soluble sugar accumulation and the dynamic changes in their content during watermelon fruit development and ripening. Nevertheless, to date, there have been no reports on the organic acid content in watermelon or the genes regulating their synthesis. In this study, the soluble sugars and organic acids in watermelon were measured and a comparative transcriptome analysis was performed to identify the key genes involved in the accumulation of these substances during fruit development and ripening...
2018: PloS One
https://www.readbyqxmd.com/read/29324846/correction-hydrogen-sulfide-alleviates-postharvest-ripening-and-senescence-of-banana-by-antagonizing-the-effect-of-ethylene
#12
Yun Ge, Kang-Di Hu, Sha-Sha Wang, Lan-Ying Hu, Xiao-Yan Chen, Yan-Hong Li, Ying Yang, Feng Yang, Hua Zhang
[This corrects the article DOI: 10.1371/journal.pone.0180113.].
2018: PloS One
https://www.readbyqxmd.com/read/29324804/genome-wide-identification-characterization-and-expression-profile-analysis-of-expansins-gene-family-in-sugarcane-saccharum-spp
#13
Thaís R Santiago, Valquiria M Pereira, Wagner R de Souza, Andrei S Steindorff, Bárbara A D B Cunha, Marília Gaspar, Léia C L Fávaro, Eduardo F Formighieri, Adilson K Kobayashi, Hugo B C Molinari
Expansins refer to a family of closely related non-enzymatic proteins found in the plant cell wall that are involved in the cell wall loosening. In addition, expansins appear to be involved in different physiological and environmental responses in plants such as leaf and stem initiation and growth, stomata opening and closing, reproduction, ripening and stress tolerance. Sugarcane (Saccharum spp.) is one of the main crops grown worldwide. Lignocellulosic biomass from sugarcane is one of the most promising raw materials for the ethanol industry...
2018: PloS One
https://www.readbyqxmd.com/read/29320527/transcriptome-analysis-during-ripening-of-table-grape-berry-cv-thompson-seedless
#14
Iván Balic, Paula Vizoso, Ricardo Nilo-Poyanco, Dayan Sanhueza, Patricio Olmedo, Pablo Sepúlveda, Cesar Arriagada, Bruno G Defilippi, Claudio Meneses, Reinaldo Campos-Vargas
Ripening is one of the key processes associated with the development of major organoleptic characteristics of the fruit. This process has been extensively characterized in climacteric fruit, in contrast with non-climacteric fruit such as grape, where the process is less understood. With the aim of studying changes in gene expression during ripening of non-climacteric fruit, an Illumina based RNA-Seq transcriptome analysis was performed on four developmental stages, between veraison and harvest, on table grapes berries cv Thompson Seedless...
2018: PloS One
https://www.readbyqxmd.com/read/29319527/identification-of-lactobacillus-delbrueckii-and-streptococcus-thermophilus-strains-present-in-artisanal-raw-cow-milk-cheese-using-real-time-pcr-and-classic-plate-count-methods
#15
Milena A Stachelska
The aim of this paper was to detect Lactobacillus delbrueckii and Streptococcus thermophilus using real-time quantitative PCR assay in 7-day ripening cheese produced from unpasteurised milk. Real-time quantitative PCR assays were designed to identify and enumerate the chosen species of lactic acid bacteria (LAB) in ripened cheese. The results of molecular quantification and classic bacterial enumeration showed a high level of similarity proving that DNA extraction was carried out in a proper way and that genomic DNA solutions were free of PCR inhibitors...
December 4, 2017: Polish Journal of Microbiology
https://www.readbyqxmd.com/read/29319455/modification-characterization-and-investigations-of-key-factors-controlling-the-transport-of-modified-nano-zero-valent-iron-nzvi-in-porous-media
#16
Amal Krishna Saha, Alok Sinha, Srinivas Pasupuleti
Enhancement of nZVI stability and transport in the sub-surface environment is important for in situ degradation of contaminants. Various biodegradable dispersants (PAA, Tween20 and Reetha Extracts) have been tested to evaluate their effectiveness in this regard. Application of dispersants during synthesis of nZVI have positively affected the reduction in particle size. The transport capacity in terms of fraction elution at different pore water velocities and collector grain size (filter media), were analyzed using correlation equation for filtration model by Rajagopalan and Tien (RT model)...
January 10, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29317671/bacterial-community-assembly-from-cow-teat-skin-to-ripened-cheeses-is-influenced-by-grazing-systems
#17
Marie Frétin, Bruno Martin, Etienne Rifa, Verdier-Metz Isabelle, Dominique Pomiès, Anne Ferlay, Marie-Christine Montel, Céline Delbès
The objectives of this study were to explore bacterial community assembly from cow teat skin to raw milk cheeses and to evaluate the role of farming systems on this assembly using 16S rRNA gene high-throughput sequencing. The two grazing systems studied (extensive vs. semi-extensive) had a greater effect on the microbiota of cow teat skin than on that of raw milks and cheeses. On teat skin, the relative abundance of several taxa at different taxonomic levels (Coriobacteriia, Bifidobacteriales, Corynebacteriales, Lachnospiraceae, Atopobium, and Clostridium) varied depending on the grazing system and the period (early or late summer)...
January 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29315644/solar-uv-light-regulates-flavonoid-metabolism-in-apple-malus-x-domestica
#18
Rebecca A Henry-Kirk, Blue Plunkett, Miriam Hall, Tony McGhie, Andrew C Allan, Jason J Wargent, Richard V Espley
Ultraviolet-B light (UV-B) is one environmental signal perceived by plants that affects the flavonoid pathway and influences the levels of anthocyanins, flavonols and proanthocyanidins. To understand the mechanisms underlying UV exposure, apple trees were grown under spectral filters that altered transmission of solar UV light. Fruit analysis showed that UV induced changes in physiology, metabolism and gene expression levels during development over a season. These changes were sustained after storage. Under low UV ripening was delayed, fruit size decreased, and anthocyanin and flavonols were reduced...
January 6, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29314841/grape-berry-acclimation-to-excessive-solar-irradiance-leads-to-repartitioning-between-major-flavonoid-groups
#19
Noam Reshef, Nurit Agam, Aaron Fait
Warm viticulture regions are associated with inferior wines, resulting from the interaction between microclimate and fruit biochemistry. Solar irradiance triggers biosynthetic processes in the fruit, and dominates its thermal balance. Therefore, deciphering its impact on fruit metabolism is pivotal to develop strategies for fruit protection, and ameliorate its quality traits. Here, we modified light quality and intensity in the fruit-zone and integrated micrometeorology with grape and wine metabolomics, allowing a complete assessment, from field to bottle...
January 9, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29313038/surface-engineering-for-improved-stability-of-ch3nh3pbbr3-perovskite-nanocrystals
#20
Artavazd Kirakosyan, Seokjin Yun, Soon-Gil Yoon, Jihoon Choi
Organohalide perovskite nanocrystals (NCs) with a variety of nano-scale structures and morphologies have shown promising potential owing to their size- and composition-dependent optoelectronic properties. Despite extensive studies on their size-dependent optical properties, a lack of understanding on their morphological transformation and the relevant stability issues limits a wide range of applications. Herein, we hypothesize a mechanism for the morphological transformation of perovskite NCs, which leads to dissolving NCs and forming microscale rectangular grains, resulting in a reduction of photoluminescence...
January 9, 2018: Nanoscale
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