24,008 results match your criteria evaporation


Multiple Dirac cones and Lifshitz transition in a two-dimensional Cairo lattice as a Hawking evaporation analogue.

J Phys Condens Matter 2021 Jun 23. Epub 2021 Jun 23.

School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Shan Da Nan Lu 27, Jinan 250100, Shandong, Jinan, Shandong, 250100, CHINA.

The linear energy-momentum dispersion of Dirac cones offers a unique platform for mimicking the fantastical phenomena in high energy physics, such as Dirac fermions and black hole (BH) horizons. Three types of Dirac cones (I, III, and II) with different tilts have been proposed individually in specific materials but lack of integral lattice model. Here, we demonstrated the three types of Dirac cones inherited in a -conjugated Cairo lattice of double-degenerate and orbitals by means of tight-binding (TB) approach, which paves a way for the design of two-dimensional (2D) Dirac materials. Read More

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Crystalline Sponge Affinity Screening: A Fast Tool for Soaking Condition Optimization without the Need of X-ray Diffraction Analysis.

Eur J Pharm Sci 2021 Jun 20:105884. Epub 2021 Jun 20.

Discovery and Development Technologies (DDTech), Merck KGaA, Frankfurter Strasse 250, 64293 Darmstadt, Germany.

Structural elucidation of small molecules only available in low quantity (nanogram) is one of the big advantages of the crystalline sponge method. The optimization of various soaking parameters is crucial for effective analyte absorption and repetitive positioning in the pores of the crystal. Time-consuming X-ray diffraction measurements are necessary for data collection and confirmation of successful guest inclusion. Read More

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Dopamine/zinc oxide doped poly(-hydroxyethyl acrylamide)/agar dual network hydrogel with super self-healing, antibacterial and tissue adhesion functions designed for transdermal patch.

J Mater Chem B 2021 Jun 23. Epub 2021 Jun 23.

School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.

Dual network (DN) hydrogels with excellent mechanical strength and controllable component adjustment characteristics have a broad application range in the field of biomedicine. However, the tissue adhesion, skin affinity, self-healing, and antibacterial properties of DN hydrogels are inadequate for their application as skin patches. In this work, we prepared dopamine/zinc oxide (DOPA/ZnO) doped poly(N-hydroxyethyl acrylamide) (p(HEAA))/agar DN hydrogels and combined them to obtain a bilayer hydrogel (two-layer gel) with moisturizing properties. Read More

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Limitation of microbial processes at saturation-level salinities in a microbial mat covering a coastal saltflat.

Appl Environ Microbiol 2021 Jun 23:AEM0069821. Epub 2021 Jun 23.

Max-Planck-Institute for Marine Microbiology, Celsiusstrasse 1, 28359 Bremen, Germany.

Hypersaline microbial mats are dense microbial ecosystems capable of performing complete element cycling and are considered analogs of Early Earth and hypothetical extraterrestrial ecosystems. We studied the functionality and limits of key biogeochemical processes, such as photosynthesis, aerobic respiration, and sulfur cycling in salt crust-covered microbial mats from a tidal flat at the coast of Oman. We measured light, oxygen, and sulfide microprofiles as well as sulfate-reduction rates at salt saturation and in flood conditions and determined fine-scale stratification of pigments, biomass, and microbial taxa in the resident microbial community. Read More

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The effect of some acrylic polymers on dissolution of celecoxib solid dispersion formulations.

Pharm Dev Technol 2021 Jun 23:1-27. Epub 2021 Jun 23.

Tabriz University of Medical Sciences Faculty of Pharmacy, Tabriz, 51664 Iran (the Islamic Republic of).

Objective: The purpose of the present study was firstly to identify the effectiveness of Eudragit® polymers (Eudragit RL, RS, L100-55, L100, S100 and E100) in inhibition of celecoxib precipitation from buffer solutions (pH =6.8). Furthermore, the influence of Eudragit polymers on non-sink dissolution behavior of celecoxib from solid dispersions was investigated. Read More

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Combination of Phospholipid Complex and Matrix Dispersion.

AAPS PharmSciTech 2021 Jun 22;22(5):189. Epub 2021 Jun 22.

Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Sector-67, S.A.S Nagar, Punjab, 160062, India.

Phospholipid complexation, despite being a successful, versatile, and burgeoning strategy, stickiness of phospholipids leads to suboptimal dissolution rate of drugs. This work was undertaken to fabricate simvastatin-phospholipid complex (SIM-PLC)-loaded matrix dispersion (SIM-PLC-MD) using Soluplus® as carrier material, to augment dispersibility and dissolution of SIM-PLC without altering complexation between simvastatin (SIM) and phospholipid. SIM-PLC and SIM-PLC-MD were prepared using solvent evaporation and discontinuous solvent evaporation techniques, respectively. Read More

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A new combination strategy to enhance apoptosis in cancer cells by using nanoparticles as biocompatible drug delivery carriers.

Sci Rep 2021 Jun 22;11(1):13027. Epub 2021 Jun 22.

Faculty of Medicine, Department of Medical Biochemistry, Akdeniz University, Antalya, Turkey.

Some experimental and clinical studies have been conducted for the usage of chemotherapeutic drugs encapsulated into nanoparticles (NPs). However, no study has been conducted so far on the co-encapsulation of doxorubicin (Dox) and epoxomicin (Epo) into NPs as biocompatible drug delivery carriers. Therefore, we investigated if co-encapsulation of doxorubicin (Dox) and/or epoxomicin (Epo) into NPs enhance their anticancer efficiency and prevent drug resistance and toxicity to normal cells. Read More

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3D Photothermal Cryogels for Solar-Driven Desalination.

ACS Appl Mater Interfaces 2021 Jun 22. Epub 2021 Jun 22.

Smart Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.

This paper reports the fabrication of photothermal cryogels for freshwater production the solar-driven evaporation of seawater. Photothermal cryogels were prepared oxidative polymerization of pyrrole with ammonium persulfate on preformed poly(sodium acrylate) (PSA) cryogels. We found that the pyrrole concentration used in the fabrication process has a significant effect on the final PSA/PPy cryogels (PPCs), causing the as-formed polypyrrole (PPy) layer on the PPC to evolve from nanoparticles to lamellar sheets and to consolidated thin films. Read More

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Analytical modeling of three-stage inactivation of viruses within droplets and solid porous particles.

Authors:
Fikret Alic

Eur Phys J Plus 2021 17;136(6):663. Epub 2021 Jun 17.

Department of Thermal and Fluid Technique, Faculty of Mechanical Engineering Tuzla, University of Tuzla, Tuzla, Bosnia and Herzegovina.

Various viruses can hide within fluid and solid structures and thus successfully cross different distances, causing the spread of viral infections. Analytical modeling of the triple treatment of virus within a small liquid droplet and within a solid porous particle is the basic research polygon of this paper. The three-stage treatment aims to maximize the efficacy of deactivating viruses indoors. Read More

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Freeform based hYperspectral imager for MOisture Sensing (FYMOS).

Opt Express 2021 May;29(11):16007-16018

We present FYMOS, an all-aluminum, robust, light weight, freeform based, near infrared hYperspectral imager for MOisture Sensing. FYMOS was designed and built to remotely measure moisture content using spectral features from 0.7-1. Read More

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Hsa_circ_0005915 promotes N,N-dimethylformamide-induced oxidative stress in HL-7702 cells through NRF2/ARE axis.

Toxicology 2021 Jun 18:152838. Epub 2021 Jun 18.

Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China. Electronic address:

N,N-dimethylformamide (DMF) is an organic compound widely used in industrial production processes as a solvent with a low evaporation rate. Excessive exposure to DMF may lead to liver damage. Oxidative stress has been reported as one of the main causes of DMF-induced hepatotoxicity. Read More

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Microscale Bipolar Charge Distributions on Surfaces after Liquid Wetting and Evaporation in an Electric Field.

Langmuir 2021 Jun 21. Epub 2021 Jun 21.

Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States.

Studies have shown that when insulator surfaces become electrostatically charged, complex spatial distributions of charge are produced, which are made up of micrometer-scale regions of both charge polarities. The origin of these charge patterns, often called "charge mosaics", is not understood. Here, we carried out controlled Kelvin force microscopy experiments on microfabricated interdigitated electrode systems to show that the process of wetting a surface by a liquid followed by evaporation of the liquid in an electric field can lead to neighboring micrometer-scale regions of positive and negative charge, which remain stable long after the electric field is removed. Read More

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Lamotrigine loaded PLGA nanoparticles intended for direct nose to brain delivery in epilepsy: pharmacokinetic, pharmacodynamic and scintigraphy study.

Artif Cells Nanomed Biotechnol 2021 Dec;49(1):511-522

Department of Pharmaceutical Sciences, Saurashtra University, Rajkot, India.

The present study aimed to investigate the brain targeting efficacy of Lamotrigine (LTG) loaded PLGA nanoparticles (LTG-PNPs) upon intranasal administration. LTG-PNPs were fabricated through the emulsification-solvent evaporation technique and evaluated for % Entrapment efficiency, particle size, release, surface morphology, crystallinity, permeation & thermal behaviour. Biodistribution, gamma scintigraphy, and pharmacodynamic studies were performed in BALB/c mice, New Zealand rabbits, and Wistar rats respectively. Read More

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December 2021

Reed Leaves Inspired Silica Nanofibrous Aerogels with Parallel-Arranged Vessels for Salt-Resistant Solar Desalination.

ACS Nano 2021 Jun 21. Epub 2021 Jun 21.

Hubei Key Laboratory of Biomass Resource Chemistry and Environmental Biotechnology, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Hubei Engineering Center of Natural Polymers-Based Medical Materials, School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China.

Sufficient and clean freshwater is still out of reach for billions of people around the world. Solar desalination from brine is regarded as one of the most promising proposals to solve this severe crisis. However, most of the reported evaporators to date still suffer from the decreasing evaporation rate caused by salt crystallization accumulated on their surface. Read More

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Aligned Millineedle Arrays for Solar Power Seawater Desalination with Site-Specific Salt Formation.

Small 2021 Jun 21:e2101487. Epub 2021 Jun 21.

Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong, Hong Kong, SAR, 999077, P. R. China.

As a sustainable and clean water production technology, solar thermal water evaporation has been extensively studied in the past few years. One challenge is that upon operation, salt would form on surface of the solar absorbers leading to inefficient water supply and light absorption and thus much reduced water vaporization rate. To address this problem, a simple solar evaporator based on an array of aligned millineedles for efficient solar water evaporation and controlled site-specific salt formation is demonstrated. Read More

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Dynamically Crosslinked Dry Ion-Conducting Elastomers for Soft Iontronics.

Adv Mater 2021 Jun 21:e2101396. Epub 2021 Jun 21.

CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China.

Soft ionic conductors show great promise in multifunctional iontronic devices, but currently utilized gel materials suffer from liquid leakage or evaporation issues. Here, a dry ion-conducting elastomer with dynamic crosslinking structures is reported. The dynamic crosslinking structures endow it with combined advantageous properties simultaneously, including high ionic conductivity (2. Read More

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Androgen and meibomian gland dysfunction: from basic molecular biology to clinical applications.

Int J Ophthalmol 2021 18;14(6):915-922. Epub 2021 Jun 18.

Department of Ophthalmology, West China Hospital of Sichuan University, Chengdu 610041, Sichuan Province, China.

Meibomian gland, the largest sebaceous gland of the body, is responsible for the biosynthesis of lipid layer of the tear film to prevent excessive evaporation. The loss of normal functions of meibomian gland, known as meibomian gland dysfunction (MGD), is a chronic disease and is the leading cause of dry eye symptoms in the clinics. Studies have found sex hormones, especially androgen, play vital roles in the regulation of the functions of meibomian gland. Read More

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An extensive review on chromium (vi) removal using natural and agricultural wastes materials as alternative biosorbents.

Authors:
Jonas Bayuo

J Environ Health Sci Eng 2021 Jun 10;19(1):1193-1207. Epub 2021 Mar 10.

Department of Science and Mathematics Education, C. K. Tedam University of Technology and Applied Sciences, Postal Box 24, Navrongo, Upper East Region Ghana.

Several conventional techniques for heavy metals decontamination for instance ion exchange, evaporation, precipitation and electroplating have been utilized in preceding years. Though these techniques have some drawbacks, adsorption using low-cost biosorbents is environmentally friendly. In this study, the potential of several natural and agricultural wastes as economical biosorbents for the reduction of Cr(VI) ions from polluted water has been reviewed. Read More

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A computational study of expiratory particle transport and vortex dynamics during breathing with and without face masks.

Phys Fluids (1994) 2021 Jun 8;33(6):066605. Epub 2021 Jun 8.

Department of Civil Engineering, Stony Brook University, Stony Brook, New York 11794, USA.

We present high-fidelity numerical simulations of expiratory biosol transport during normal breathing under indoor, stagnant air conditions with and without a facile mask. We investigate mask efficacy to suppress the spread of saliva particles that is underpinnings existing social distancing recommendations. The present simulations incorporate the effect of human anatomy and consider a spectrum of saliva particulate sizes that range from 0. Read More

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Large-scale supercritical fluid chromatography purification of unstable STING agonist intermediates.

J Chromatogr A 2021 Jun 6;1651:462309. Epub 2021 Jun 6.

Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, NJ 08540, United States.

A regioisomeric mixture of the nucleoside derivative, Intermediate 1, required resolution by preparative supercritical fluid chromatography (SFC) in order to obtain the desired regioisomer as a key intermediate in a STING agonist program. Various chiral columns and solvents including methanol, acetonitrile, isopropanol, and the mixture of acetonitrile and isopropanol as organic modifiers in carbon dioxide at different temperatures were screened to obtain the best regioisomeric resolution. A key issue associated with interconversion between the regioisomers via silyl migration during purification was investigated in methanol, acetonitrile, and the mixture of acetonitrile and isopropanol, and the optimal organic modifier in CO was established to mitigate the interconversion to an acceptable level (<5%). Read More

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A Smart Design Strategy for Super-Elastic Hydrogel with Long-Term Moisture, Extreme Temperature Resistance, and Non-Flammability.

Adv Sci (Weinh) 2021 Jun 19:e2100320. Epub 2021 Jun 19.

School of Architecture, Southwest Minzu University, Chengdu, 610041, P. R. China.

Elastic hydrogel is a promising material category for designing biological muscles, repairable building materials, flexible electronic devices, and vulcanized rubber substitutes, which is required to have a long life, good self-healing performance and extreme temperature tolerance. Herein, a super-elastic mineral hydrogel is developed with long-lasting moisture, based on dynamic physical crosslinking between hydrated calcium ion clusters and amide groups of polyacrylamide (PAM). The complex hydrogel exhibits a super stretchability of 13 600% at room temperature, and can maintain the super flexibility in a wide temperature range of -40-50 °C or for a long period of 28 days. Read More

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Inhibition of cow's milk allergy development in mice by oral delivery of β-lactoglobulin derived peptides loaded PLGA nanoparticles is associated with systemic whey-specific immune silencing.

Clin Exp Allergy 2021 Jun 17. Epub 2021 Jun 17.

Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, the Netherlands.

Background: 2-4% Of infants are affected by cow's milk allergy (CMA), which persists in 20% of cases. Intervention approaches using early oral exposure to cow's milk protein or hydrolyzed cow's milk formula are being studied for CMA prevention. Yet, concerns regarding safety and/or efficacy remain to be tackled in particular for high-risk non-exclusively breastfed infants. Read More

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Study on the physicochemical characteristics and dust suppression performance of new type chemical dust suppressant for copper mine pavement.

Environ Sci Pollut Res Int 2021 Jun 18. Epub 2021 Jun 18.

State Key Laboratory of High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Ministry of Education, Beijing, 100083, China.

Copper mine road dust is the major source of dust in mine operations. The dust produced on the road surface is a great hazard to the workers. Aiming at the road dust of an open-pit mine, this paper conducts a physical and chemical analysis of a new type of chemical dust suppressant. Read More

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Construction of an integrated multi-layer textile for solar-driven steam generation.

Appl Opt 2021 Jun;60(16):4930-4937

Solar steam generation has widespread application in wastewater treatment, seawater desalination, liquid-liquid separation, and other fields, providing potential opportunities for producing fresh water. Up until now, most researchers in this field focused on enhancing the evaporation rate of the solar steam generation device. However, problems in terms of its portability and flexibility still exist when it comes to real application scenarios. Read More

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A novel downstream process for highly pure 1,3-propanediol from an efficient fed-batch fermentation of raw glycerol by .

Eng Life Sci 2021 Jun 7;21(6):351-363. Epub 2021 May 7.

Institute of Bioprocess and Biosystems Engineering Hamburg University of Technology Hamburg Germany.

An efficient downstream process without prior desalination was developed for recovering 1,3-propanediol (1,3-PDO) with high purity and yield from broth of a highly productive fed-batch fermentation of raw glycerol by . After removal of biomass and proteins by ultrafiltration, and concentration by water evaporation, 1,3-PDO was directly recovered from the broth by vacuum distillation with continuous addition and regeneration of glycerol as a supporting agent. Inorganic salts in the fermentation broth were crystallized but well suspended by a continuous flow of glycerol during the distillation process, which prevented salt precipitation and decline of heat transfer. Read More

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Macroscopic rods from assembled colloidal particles of hydrothermally carbonized glucose and their use as templates for silicon carbide and tricopper silicide.

J Colloid Interface Sci 2021 Jun 14;602:480-489. Epub 2021 Jun 14.

Department of Materials and Environmental Chemistry, Stockholm University Svante Arrhenius väg 16 C SE 10691 Stockholm, Sweden. Electronic address:

Self-aggregated colloids can be used for the preparation of materials, and we studied long rod-like aggregates formed on the evaporation of water from dispersed particles of colloidal hydrochar. The monodispersed hydrochar particles (100-200 nm) were synthesized by the hydrothermal carbonization of glucose and purified through dialysis. During the synthesis they formed colloidal dispersions which were electrostatically stable at intermediate to high pH and at low ion strengths. Read More

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Dual Targeting Smart Drug Delivery System for Multimodal Synergistic Combination Cancer Therapy with Reduced Cardiotoxicity.

Acta Biomater 2021 Jun 14. Epub 2021 Jun 14.

Institute of radiation and Polymer Technology, Bangladesh Atomic Energy Commission, Dhaka 1000, Bangladesh. Electronic address:

This study first reports the development of a smart drug delivery system (DDS) for multimodal synergistic cancer therapy combining chemo-photothermal-starvation approaches. A magnetic photothermal agent was synthesized by preparing iron oxide (IO) nanoparticles (NPs) with covalently attached indocyanine green (ICG) and glucose oxidase (GOx) ([email protected]). Synthesized [email protected] NPs were co-encapsulated with doxorubicin (Dox) and EGCG ((-)-epigallocatechin-3-gallate) inside PLGA (poly(lactic-co-glycolic acid)) NPs using multiple emulsion solvent evaporation method. Read More

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Plasmonic Ag-Decorated Few-Layer MoS Nanosheets Vertically Grown on Graphene for Efficient Photoelectrochemical Water Splitting.

Nanomicro Lett 2020 Aug 25;12(1):172. Epub 2020 Aug 25.

Department of Materials Science and Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea.

A controllable approach that combines surface plasmon resonance and two-dimensional (2D) graphene/MoS heterojunction has not been implemented despite its potential for efficient photoelectrochemical (PEC) water splitting. In this study, plasmonic Ag-decorated 2D MoS nanosheets were vertically grown on graphene substrates in a practical large-scale manner through metalorganic chemical vapor deposition of MoS and thermal evaporation of Ag. The plasmonic Ag-decorated MoS nanosheets on graphene yielded up to 10 times higher photo-to-dark current ratio than MoS nanosheets on indium tin oxide. Read More

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Highly Thermo-Conductive Three-Dimensional Graphene Aqueous Medium.

Nanomicro Lett 2020 Jul 1;12(1):138. Epub 2020 Jul 1.

State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, People's Republic of China.

Highly thermo-conductive aqueous medium is a crucial premise to demonstrate high-performance thermal-related applications. Graphene has the diamond comparable thermal conductivity, while the intrinsic two-dimensional reality will result in strong anisotropic thermal conductivity and wrinkles or even crumples that significantly sacrifices its inherent properties in practical applications. One strategy to overcome this is to use three-dimensional (3D) architecture of graphene. Read More

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Toxicity nanoinsecticide based on clove essential oil against (Herbst).

J Pestic Sci 2021 May;46(2):222-228

Department of Pest and Plant Disease, Faculty of Agriculture, University of Brawijaya, Malang, Indonesia.

This study aimed to characterize nanoparticles loaded with clove () essential oil-based polyethylene glycol (PEG) and to know their insecticidal activity against red flour beetle (). The nanoparticles have irregular shapes in good dispersion. The nanoformulation could not enhance clove oil contact toxicity to . Read More

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