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https://www.readbyqxmd.com/read/29667830/dynamics-of-contact-line-pinning-and-depinning-of-droplets-evaporating-on-micro-ribs
#1
Ali Mazloomi Moqaddam, Dominique Derome, Jan Carmeliet
The contact line dynamics of evaporating droplets deposited on a set of parallel micro-ribs is analyzed with the use of a recently developed entropic lattice Boltzmann model for two-phase flow. Upon deposition, part of the droplet penetrates into the space between ribs due to capillary action, while the remaining liquid of the droplet remains pinned on top of the micro-ribs. In a first stage, evaporation continues until the droplet undergoes a series of pinning-depinning events, showing alternatively constant contact radius and constant contact angle modes...
April 18, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29667631/-the-specific-features-of-the-blood-stains-depending-on-their-volume
#2
M N Nagornov, E N Leonova, A M Semenov
The objective of the present study was to determine the minimal and maximum volume of blood droplets freely falling from various droplet-forming surfaces and to characterize the specific morphological features of the resulting stains. The experiments were designed so that the blood droplets were allowed to fall down from the height of 10 cm to 1.5 m. The drop volume varied from 5 mcl to 134 mcl depending on the shape of the objects and the area of the droplet-forming surfaces. The size of the blood stains ranged from 0...
2018: Sudebno-meditsinskaia Ekspertiza
https://www.readbyqxmd.com/read/29667398/biomimetic-multilayer-nanofibrous-membranes-with-elaborated-superwettability-for-effective-purification-of-emulsified-oily-wastewater
#3
Jianlong Ge, Qing Jin, Dingding Zong, Jianyong Yu, Bin Ding
Creating a porous membrane to effectively separate the emulsified oil-in-water emulsions with energy-saving property is highly desired but remains a challenge. Herein, a multilayer nanofibrous membrane was developed with the inspiration of the natural architectures of earth for gravity driving water purification. As a result, the obtained biomimetic multilayer nanofibrous membranes exhibited three individual layers with designed functions, those were the inorganic nanofibrous layer to block the seriously intrusion of oil to prevent the destructive fouling of the polymeric matrix; the submicron porous layer with designed honeycomb-like cavities to catch the smaller oil droplets and ensures a satisfactory water permeability; the high porous fibrous substrate with larger pore size provided a template support and allows water to pass through quickly...
April 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29667316/opposite-effects-of-the-spinach-food-matrix-on-lutein-bioaccessibility-and-intestinal-uptake-lead-to-unchanged-bioavailability-compared-to-pure-lutein
#4
Marielle Margier, Caroline Buffière, Pascale Goupy, Didier Remond, Charlotte Halimi, Catherine Caris, Patrick Borel, Emmanuelle Reboul
SCOPE: Food matrix is generally believed to alter carotenoid bioavailability, but its effect on xanthophylls is usually limited. We thus aimed to decipher the digestion-absorption process of lutein in the presence or not of a food matrix. METHODS: We assessed lutein transfer to gastric-like lipid droplets or artificial mixed micelles when lutein was added to test meals either as a pure molecule ((all-E)-lutein) or in canned spinach ((Z) + (all-E)-lutein). The obtained mixed micelles were delivered to Caco-2 cells to evaluate lutein uptake...
April 17, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29666862/dual-marangoni-effects-and-detection-of-traces-of-surfactants
#5
M Arangalage, X Li, F Lequeux, L Talini
We report controlled and tunable Marangoni flows resulting from concentration gradients that are induced by placing a droplet of volatile solute above the surface of a liquid. Condensation of the solute at the liquid surface results in a surface tension gradient that drives a permanent flow of surface velocity up to a few centimeters per second. Depending on the sign of the variation of surface tension with solute concentration, inward or outward surface flows can be obtained. We show that, in the region close to the vertical axis of the droplet, the flow rate varies with the droplet height following a power law, whose exponent depends on the nature of the transfer of the solute in air...
April 18, 2018: Soft Matter
https://www.readbyqxmd.com/read/29665934/-effect-of-regulating-ppar%C3%AE-by-mtor-signaling-on-adipogenesis-of-bone-marrow-mesenchymal-stem-cells-from-aplastic-anemia
#6
Fang Wei, Wei-Huan Zhang, Xiu-Lian Zhang, Xiao-Jing Ge, Shu-Qin Zhang
OBJECTIVE: To study the effect and mechanism of mTOR signaling on adipogenesis of bone marrow mesenchymal stem cells(BM-MSCs) from aplastic anemia (AA) patients through regulation of PPARγ. METHODS: BM-MSCs were isolated from 24 newly diagnosed AA patients and 24 healthy controls. The surface antigen expression of BM-MSCs was identified by flow cytometry. The capacity of adipogenic differentiation of BM-MSCs was determined by lipid droplets based on Oil Red O staining and by the expression of FABP4 based on Western blot...
April 2018: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/29665317/encapsulation-and-release-of-functional-nanodroplets-entrapped-in-nanofibers
#7
Kusuma Thongchaivetcharat, Ratchapol Jenjob, Daniel Crespy
A method is presented for preserving the structural integrity of nanodroplets produced by emulsification. Droplets of different hydrophobic liquids such as essential oils or monomers are produced by the miniemulsion process. The miniemulsions are then electrospun to yield dextran nanofibers entrapping the hydrophobic nanodroplets. The nanodroplets are then successfully redispersed by dissolving the nanofibers in water. Furthermore, it is shown that nanofibers can be used to store a monomer and a catalyst as healing agents for ring-opening metathesis polymerization...
April 17, 2018: Small
https://www.readbyqxmd.com/read/29664628/joint-effects-of-granule-size-and-degree-of-substitution-on-octenylsuccinated-sweet-potato-starch-granules-as-pickering-emulsion-stabilizers
#8
Li Jinfeng, Fayin Ye, Lin Lei, Yun Zhou, Guohua Zhao
The granules of sweet potato starch were size-fractionated into three portions with significantly different median diameters (D50) of 6.67 (small-sized), 11.54 (medium-sized) and 16.96 µm (large-sized), respectively. Each portion was hydrophobized at the mass-based degrees of substitution (DSm) of approximately 0.0095 (low), 0.0160 (medium) and 0.0230 (high). The Pickering emulsion stabilizing capacities of modified granules were tested, and the resultant emulsions were characterized. The joint effects of granule size and DSm on emulsifying capacity (EC) were investigated by response surface methodology...
April 17, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29664623/fabrication-and-characterization-of-quinoa-protein-nanoparticles-stabilized-food-grade-pickering-emulsions-with-ultrasound-treatment-interfacial-adsorption-arrangement-properties
#9
Xin-Sheng Qin, Zhigang Luo, Xichun Peng
The natural quinoa protein isolate (QPI) was largely reflected in the nanoparticle form at pH 7.0 (about 401 nm), and the ultrasound at 20 min progressively improved the contact angle (wettability) and surface hydrophobicity of the nanoparticles. Ultrasound process also modified the type of intra-particle interaction, and the internal forces of sonicated particles were largely maintained by both disulfide bonds and hydrophobic interaction forces. In emulsion system, the ultrasound progressively increased the emulsification efficiency of the QPI nanoparticles, particularly at high protein concentration (c>1%, w/v), and higher emulsion stability against coalescence...
April 17, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29663698/comparative-study-of-two-droplet-based-dissolving-microneedle-fabrication-methods-for-skin-vaccination
#10
Chisong Lee, Hongil Kim, Suyong Kim, Shayan F Lahiji, Na-Young Ha, Huisuk Yang, Geonwoo Kang, Hai Yen Thi Nguyen, Yuri Kim, Myung-Sik Choi, Nam-Hyuk Cho, Hyungil Jung
Dissolving microneedles (DMNs) have been widely studied in medical applications due to their pain-free administration, superior efficiency, and safe drug delivery. In skin vaccination, preserving the activity of the encapsulated antigen is an important consideration, as antigen activity is lost during DMN fabrication because of various stress factors. These stress factors vary between fabrication methods and each method affects the antigen's activity to different degrees. In this study, the activity of encapsulated antigens delivered by DMNs is compared between two recently developed DMN fabrication methods; droplet-born air blowing (DAB) and centrifugal lithography (CL) for a model scrub typhus vaccine antigen, ScaA...
April 16, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29663555/dehydroleucodine-inhibits-mitotic-clonal-expansion-during-adipogenesis-through-cell-cycle-arrest
#11
S Abood, M L Veisaga, L A López, M A Barbieri
Aberrant levels of preadipocyte differentiation, triggered by adipocyte hyperplasia and hypertrophy, results in the obesogenic phenotype. Obesity is a risk factor for several metabolic disorders. In this paper, dehydroleucodine inhibited the accumulation of lipid droplets and decreased the elevations of triglycerides, and this inhibitory effect occurred during the early stage of adipogenesis. Thus, not only did dehydroleucodine downregulate the expression of C/EBPα and PPARγ, it also strongly blocked the expression of C/EBPβ, an early stage biomarker of early adipogenesis, in a concentration-dependent manner...
April 16, 2018: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29663540/extreme-toughening-of-soft-materials-with-liquid-metal
#12
Navid Kazem, Michael D Bartlett, Carmel Majidi
Soft and tough materials are critical for engineering applications in medical devices, stretchable and wearable electronics, and soft robotics. Toughness in synthetic materials is mostly accomplished by increasing energy dissipation near the crack tip with various energy dissipation techniques. However, bio-materials exhibit extreme toughness by combining multi-scale energy dissipation with the ability to deflect and blunt an advancing crack tip. Here, we demonstrate a synthetic materials architecture that also exhibits multi-modal toughening, whereby embedding a suspension of micron sized and highly deformable liquid metal (LM) droplets inside a soft elastomer, the fracture energy dramatically increases by up to 50x (from 250 ± 50 J m-2 to 11,900 ± 2600 J m-2 ) over an unfilled polymer...
April 16, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29663061/sizing-lipid-droplets-from-adult-and-geriatric-mouse-liver-tissue-via-nanoparticle-tracking-analysis
#13
Katherine A Muratore, Charles P Najt, Nicholas M Livezey, James Marti, Douglas G Mashek, Edgar A Arriaga
The significance of lipid droplets in lipid metabolism, cell signaling, and regulating longevity is increasingly recognized, yet the lipid droplet's unique properties and architecture make it difficult to size and study using conventional methods. To begin to address this issue, we demonstrate the capabilities of nanoparticle tracking analysis (NTA) for sizing of lipid droplets. NTA was found to be adequate to assess lipid droplet stability over time, indicating that lipid droplet preparations are stable for up to 24 h...
April 17, 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29662634/caloric-restriction-delays-yeast-chronological-aging-by-remodeling-carbohydrate-and-lipid-metabolism-altering-peroxisomal-and-mitochondrial-functionalities-and-postponing-the-onsets-of-apoptotic-and-liponecrotic-modes-of-regulated-cell-death
#14
Anthony Arlia-Ciommo, Anna Leonov, Adam Beach, Vincent R Richard, Simon D Bourque, Michelle T Burstein, Pavlo Kyryakov, Alejandra Gomez-Perez, Olivia Koupaki, Rachel Feldman, Vladimir I Titorenko
A dietary regimen of caloric restriction delays aging in evolutionarily distant eukaryotes, including the budding yeast Saccharomyces cerevisiae . Here, we assessed how caloric restriction influences morphological, biochemical and cell biological properties of chronologically aging yeast advancing through different stages of the aging process. Our findings revealed that this low-calorie diet slows yeast chronological aging by mechanisms that coordinate the spatiotemporal dynamics of various cellular processes before entry into a non-proliferative state and after such entry...
March 23, 2018: Oncotarget
https://www.readbyqxmd.com/read/29662065/dripplons-as-localized-and-superfast-ripples-of-water-confined-between-graphene-sheets
#15
Hiroaki Yoshida, Vojtěch Kaiser, Benjamin Rotenberg, Lydéric Bocquet
Carbon materials have unveiled outstanding properties as membranes for water transport, both in 1D carbon nanotube and between 2D graphene layers. In the ultimate confinement, water properties however strongly deviate from the continuum, showing exotic properties with numerous counterparts in fields ranging from nanotribology to biology. Here, by means of molecular dynamics, we show a self-organized inhomogeneous structure of water confined between graphene sheets, whereby the very strong localization of water defeats the energy cost for bending the graphene sheets...
April 16, 2018: Nature Communications
https://www.readbyqxmd.com/read/29660846/phospholipase-d2-promotes-disease-progression-of-renal-cell-carcinoma-through-the-induction-of-angiogenin
#16
Shuya Kandori, Takahiro Kojima, Taeko Matsuoka, Takayuki Yoshino, Aiko Sugiyama, Eijiro Nakamura, Toru Shimazui, Yuji Funakoshi, Yasunori Kanaho, Hiroyuki Nishiyama
A hallmark of clear cell renal cell carcinoma (ccRCC) is the presence of intracellular lipid droplets (LD) and it is assumed that phosphatidic acid (PA) produced by phospholipase D (PLD) plays some roles in the LD formation. However, little is known about the significance of PLD in ccRCC. In this study, we examined the expression levels of PLD in ccRCC. The classical mammalian isoforms of PLD are PLD1 and PLD2, and the levels of both mRNAs were higher at the primary tumor sites than in normal kidney tissues...
April 16, 2018: Cancer Science
https://www.readbyqxmd.com/read/29660164/high-grade-panin-presenting-with-localized-stricture-of-the-main-pancreatic-duct-a-clinicopathological-and-molecular-study-of-10-cases-suggests-a-clue-for-the-early-detection-of-pancreatic-cancer
#17
Masataka Yokode, Masayuki Akita, Kohei Fujikura, Mi-Ju Kim, Yukiko Morinaga, Seiichi Yoshikawa, Takuro Terada, Hiroshi Matsukiyo, Takuma Tajiri, Shiho Abe-Suzuki, Tomoo Itoh, Seung-Mo Hong, Yoh Zen
AIMS: This study aimed to identify the pathological features of high-grade PanIN that presents with imaging-detectable abnormalities. METHODS AND RESULTS: Ten cases of isolated, main-duct, high-grade PanIN as the primary clinical presentation were identified. All patients presented with stenosis of the main pancreatic duct, with 2 being associated with extensive upstream duct dilatation (>5 mm in diameter). Pancreatic juice cytology suggested adenocarcinoma in all 7 cases examined...
April 16, 2018: Histopathology
https://www.readbyqxmd.com/read/29659932/effects-of-bacterial-dose-and-fly-sex-on-persistence-and-excretion-of-salmonella-enterica-serovar-typhimurium-from-adult-house-flies-musca-domestica-l-diptera-muscidae
#18
Dana Nayduch, Klara Zurek, Jessica L Thomson, Kathleen M Yeater
Salmonella Typhimurium (Le Minor and Popoff 1987; Enterobacteriales: Enterobacteriaceae) is a pathogen that causes gastroenteritis in humans and can be harbored by house flies. Factors influencing excretion of S. Typhimurium from infected flies have not been elucidated but are essential for assessing transmission potential. We determined the persistence and excretion of a green fluorescent protein (GFP) expressing strain of S. Typhimurium from house flies. Individual male and female flies were fed either sterile Luria-Bertani (LB) broth (controls) or cultures of "high" (~105 colony forming units [CFU]) or "low" (~104 CFU) doses of bacteria (treatments)...
April 11, 2018: Journal of Medical Entomology
https://www.readbyqxmd.com/read/29659290/controlling-self-assembly-and-topology-at-micro-nano-length-scales-using-contact-free-mixed-nanocolloid-droplet-architecture
#19
Lijun T Raju, Shubhankar Chakraborty, Binita Pathak, Saptarshi Basu
Spatially varying ordering of colloids of multiple sizes at micro-nano scales finds application in different industrial processes including manufacturing of photonic crystals. In this work, we showcase a unique physics based architecture through which we have been able to control the morphology of the precipitates evolving out of the drying of a contact free droplet at micro to nano length-scales. We show that by varying the relative concentration of the larger sized colloids, one can modulate evaporation, subsequent particle transport and particle ordering at the droplet interface, thereby controlling the rates of certain instabilities like buckling...
April 16, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29658544/aerosol-processing-a-wind-of-innovation-in-the-field-of-advanced-heterogeneous-catalysts
#20
REVIEW
Damien P Debecker, Solène Le Bras, Cédric Boissière, Alexandra Chaumonnot, Clément Sanchez
Aerosol processing is long known and implemented industrially to obtain various types of divided materials and nanomaterials. The atomisation of a liquid solution or suspension produces a mist of aerosol droplets which can then be transformed via a diversity of processes including spray-drying, spray pyrolysis, flame spray pyrolysis, thermal decomposition, micronisation, gas atomisation, etc. The attractive technical features of these aerosol processes make them highly interesting for the continuous, large scale, and tailored production of heterogeneous catalysts...
April 16, 2018: Chemical Society Reviews
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