85,064 results match your criteria powder


Enhanced biological phosphorus and nitrogen removal by high-concentration powder carriers: extracellular polymeric substance, microbial communities, and metabolic pathways.

Environ Sci Pollut Res Int 2022 Aug 13. Epub 2022 Aug 13.

State Key Lab Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.

In this study, diatomite, activated carbon, and iron-carbon (Fe-C) were used as biological carriers for the integrated fixed-film activated sludge process. Biomass, pollutant removal efficiency, and extracellular polymer were tested, and the effect of nitrogen and phosphorus removal, enzyme activity, and microbial diversity were studied after the sludge retention time was changed. The mechanism of carrier enriching microorganism and promoting pollutant degradation was studied. Read More

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Perovskite or Not Perovskite? A Deep Learning Approach to Automatically Identify New Hybrid Perovskites from X-ray Diffraction Patterns.

Adv Mater 2022 Aug 13:e2203879. Epub 2022 Aug 13.

Centre National de la Recherche Scientifique (CNRS), IMN, 2 rue de la Houssinière, Nantes, 44322, France.

Determining the crystal structure is a critical step in the discovery of new functional materials. This process is time consuming and requires extensive human expertise in crystallography. Here, we developed a machine learning based approach which enables to determine automatically if an unknown material is of perovskite type from powder X-ray diffraction patterns. Read More

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Optimization of reduced graphene oxide production using central composite design from Pennisetum glaucum for biomedical applications.

Biotechnol Appl Biochem 2022 Aug 13. Epub 2022 Aug 13.

Associate Professor, Department of Biotechnology, St. Joseph's College of Engineering, OMR, Chennai, 600 119, India.

The current study outlines the toxicity free Green synthesis of reduced Graphene oxide (GO) using Celosia argenta. The synthesized sample was characterized by UV- Visible spectroscopy with a strong absorption peak at 260 nm due to redshift. The 2θ value around 24. Read More

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Design and manufacture of a lyophilised faecal microbiota capsule formulation to GMP standards.

J Control Release 2022 Aug 10. Epub 2022 Aug 10.

Institute of Pharmaceutical Science, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom. Electronic address:

Faecal microbiota transplant (FMT) is an established and effective treatment for recurrent Clostridioides difficile infection (CDI) and has many other potential clinical applications. However, preparation and quality of FMT is poorly standardised and clinical studies are hampered by a lack of well-defined FMT formulations that meet regulatory standards for medicines. As an alternative to FMT suspensions for administration by nasojejunal tube or colonoscopy, which is invasive and disliked by many patients, this study aimed to develop a well-controlled, standardised method for manufacture of lyophilised FMT capsules and to provide stability data allowing storage for extended time periods. Read More

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Enzyme inhibitory activities of phenolic compounds in pecan and the effect on starch digestion.

Int J Biol Macromol 2022 Aug 10. Epub 2022 Aug 10.

Department of Food Science and Technology, University of Georgia, United States. Electronic address:

Pecan has been widely recognized for its high phenolic content and related health benefits. Previous studies indicated that pecan consumption might be beneficial in the treatment of type 2 diabetes mellitus (T2DM). The objective of this study was to investigate the enzyme inhibitory activities of pecan phenolic compounds (PPC) and the effect in starch hydrolysis by in vitro simulation digestion. Read More

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Daily inhaled flow profiles and drug release from dry powder inhalers in patients with bronchial asthma.

Respir Med 2022 Aug 7;201:106950. Epub 2022 Aug 7.

Department of Respiratory Medicine, Tokai University School of Medicine, 143, Shimokasuya, Isehara, Kanagawa, 259-1121, Japan.

Background: Inhalation flow profiles may affect particle release from dry powder inhalers (DPIs). Currently available measures include a limited number of laboratory-measured parameters such as peak inhalation flow (PIF) and inhaled volume (inhV). We aimed to investigate whether parameters obtained under such conditions are valid in real-world settings and determine the effective inhalation profile. Read More

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Enhancing cell resistance for production of mixed microbiological reference materials with Salmonella and coliforms by freeze-drying.

Braz J Microbiol 2022 Aug 13. Epub 2022 Aug 13.

Department of Microbiology, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil.

The reference material (RM) is a technical requirement for the quality assurance of analytical results and proficiency tests or interlaboratory comparisons. Microbiological RMs are most available in the dehydrated form, mainly by freeze-drying, and maintaining bacterial survival after preparation is a challenge. Thus, obtaining the most resistant cells is essential. Read More

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Preparation and Evaluation of Low-Dose Calcitriol Dry Powder Inhalation as Host-Directed Adjunct Therapy for Tuberculosis.

Pharm Res 2022 Aug 12. Epub 2022 Aug 12.

CSIR-Central Drug Research Institute, Lucknow, 226031, India.

Background: It is unclear whether Vitamin D is efficacious as a host-directed therapy (HDT) for patients of tuberculosis (TB). We investigated pulmonary delivery of the active metabolite of Vitamin D, i.e. Read More

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Microstructural and nanoindentation study of TaN incorporated ZrB and ZrB-SiC ceramics.

Sci Rep 2022 Aug 12;12(1):13765. Epub 2022 Aug 12.

Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea.

This study assessed the sinterability and microstructure of ZrB-SiC-TaN and ZrB-TaN ceramics. Spark plasma sintering at 2000 °C and 30 MPa for 5 min produced both ceramics. The relative density of ZrB ceramic containing TaN was 95. Read More

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In situ melt pool measurements for laser powder bed fusion using multi sensing and correlation analysis.

Sci Rep 2022 Aug 12;12(1):13716. Epub 2022 Aug 12.

Grado Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, VA, 24061, USA.

Laser powder bed fusion is a promising technology for local deposition and microstructure control, but it suffers from defects such as delamination and porosity due to the lack of understanding of melt pool dynamics. To study the fundamental behavior of the melt pool, both geometric and thermal sensing with high spatial and temporal resolutions are necessary. This work applies and integrates three advanced sensing technologies: synchrotron X-ray imaging, high-speed IR camera, and high-spatial-resolution IR camera to characterize the evolution of the melt pool shape, keyhole, vapor plume, and thermal evolution in Ti-6Al-4V and 410 stainless steel spot melt cases. Read More

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Supplementation of polyphenol-rich grapes attenuates colitis, colitis-associated colon cancer and disease-associated dysbiosis in mice, but fails to mitigate colitis in antibiotic-treated mice.

J Nutr Biochem 2022 Aug 9:109124. Epub 2022 Aug 9.

Department of Nutrition Science, College of Health and Human Sciences, Purdue University, West Lafayette, IN. Electronic address:

Polyphenols are known to interact with gut microbes that play key roles in maintaining gut health, but the role of gut microbiota modulation by polyphenols in mitigating colonic diseases is not fully established. We hypothesize that the interaction of polyphenols with the gut microbiota contributes to the attenuation of colitis and colitis-associated colon cancer (CAC). To test this hypothesis, we examined the effects of dietary supplementation of polyphenol-rich grape powder (GP) on azoxymethane (AOM) and dextran sulfate sodium (DSS)-induced colitis, CAC and the gut microbiota in mice (study 1), and further compared anti-colitis effects of GP in regular and antibiotic-treated mice (study 2). Read More

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Silicone glue-based graphite ink incorporated on paper platform as an affordable approach to construct stable electrochemical sensors.

Talanta 2022 Aug 6;251:123812. Epub 2022 Aug 6.

Instituto de Química, Universidade Federal de Goiás, 74690-900, Goiânia, GO, Brazil; Instituto Nacional de Ciência e Tecnologia de Bioanalítica, 13083-861, Campinas, SP, Brazil. Electronic address:

This study describes the development of electrochemical paper-based analytical devices (ePADs) using carbon-based paste combining silicone glue and graphite powder. The ePADs were manufactured using the screen-printing technique, which consisted of depositing the conductive ink on a screencast on the paper surface. In addition, an alternative electrical connector was designed and 3D-printed to make the detection method cheaper, portable and reproducible. Read More

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Real-time monitoring of aqueous Hg reduction dynamics by magnetite/iron metal composite powders synthesized hydrothermally.

Water Sci Technol 2022 Aug;86(3):596-609

HYMAG'IN, Grenoble 38000, France.

An iron-based powder material composed of zerovalent iron (8 wt.%) and magnetite (92 wt.%), has been synthesized hydrothermally at 200 °C from zero-valent iron. Read More

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Structure and Magnetic Properties of a Nanosized Iron-Doped Bismuth Titanate Pyrochlore.

Inorg Chem 2022 Aug 12. Epub 2022 Aug 12.

Institute of Solid State Chemistry, Ural Branch, Russian Academy of Science, Ekaterinburg 620990, Russia.

The nanosized (50-70 nm) pyrochlore BiFeTiO was prepared by a coprecipitation technique. Characterization of BiFeTiO was carried out by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), Raman spectroscopy, Mössbauer spectroscopy, and magnetic susceptibility measurements. The study of Fe doping in BiTiO was performed by means of density functional theory (DFT) calculations. Read More

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The unapproved drug centrophenoxine (meclofenoxate) in cognitive enhancement dietary supplements.

Clin Toxicol (Phila) 2022 Aug 12:1-3. Epub 2022 Aug 12.

National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, Oxford, MS, USA.

Introduction: Centrophenoxine (meclofenoxate) is prescribed in China and elsewhere to treat a variety of conditions including alcoholism and dementia, but the US Food and Drug Administration has not approved the drug for any indication. We designed our study to determine the presence and quantity of centrophenoxine in dietary supplements sold over-the-counter in the US.

Methods: Supplements were included in our study if the label included (a) the term "dietary supplement" and (b) "centrophenoxine" as a declared ingredient. Read More

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[Therapeutic effect of amniotic membrane-fibrin sealant cement on severe ocular surface alkali burn in rabbits].

Zhonghua Yan Ke Za Zhi 2022 Aug;58(8):606-614

The Second People Hospital of Yunnan Province, Yunnan Eye Hospital, Yunnan Institute of Ophthalmology, Yunnan Key Laboratory of Ophthalmic Disease Prevention and Treatment, Yunnan Clinical Medical Center for Ophthalmic Diseases, Yunnan Clinical Medical Research Center for Eye Diseases, Kunming 650021, China.

Objective To prepare a biologically active amniotic membrane powder and explore its preservation conditions, and to evaluate the efficacy of the amniotic membrane (AM)-fibrin sealant (FS) cement made from the amniotic powder on the rabbit severe ocular surface alkali burn model. Methods Experimental research. Fresh AM was air-dried, cooled with liquid nitrogen, ground into amniotic powder and sterilized by radiation. Read More

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Synthesis and Analysis of Impregnation on Activated Carbon in Multiwalled Carbon Nanotube for Cu Adsorption from Wastewater.

Bioinorg Chem Appl 2022 31;2022:7470263. Epub 2022 Jul 31.

Department of Mechanical Engineering, College of Engineering and Technology, Mettu University, Mettu 318, Ethiopia.

Industrial wastes contain more toxins that get dissolved in the rivers and lakes, which are means of freshwater reservoirs. The contamination of freshwater leads to various issues for microorganisms and humans. This paper proposes a novel method to remove excess copper from the water. Read More

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Role of Pumpkin Parts as Pharma-Foods: Antihyperglycemic and Antihyperlipidemic Activities of Pumpkin Peel, Flesh, and Seed Powders, in Alloxan-Induced Diabetic Rats.

Int J Food Sci 2022 2;2022:4804408. Epub 2022 Aug 2.

Institute of Food and Nutritional Sciences, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan.

Pumpkin is a well-known vegetable, among the members of family, due to its importance as pharma food. Keeping in view the antidiabetic and plasma lipids lowering potential of pumpkin, the present study was conducted to investigate that, which part of pumpkin (peel, flesh, and seeds), possess more bioactive compounds, exhibiting antihyperglycemic and antihyperlipidemic potential. Albino rats with 190-210 g body weight were divided into 11 groups. Read More

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Study of the Antimicrobial Activity of the Chinese Dong Ethnic Minority Medicine, Madeng'ai.

Evid Based Complement Alternat Med 2022 1;2022:3678240. Epub 2022 Aug 1.

Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, Chongqing 400016, China.

The overuse of antibiotics has contributed to the emergence of multidrug-resistant bacteria, which poses a challenging task for clinical therapy. Thus, new agents with antibiotic efficacy against multidrug-resistant infections are needed. The traditional Dong ethnic minority medicines have emerged as a new source for prodrug selection. Read More

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Dietary licorice flavonoids powder improves serum antioxidant capacity and immune organ inflammatory responses in weaned piglets.

Front Vet Sci 2022 26;9:942253. Epub 2022 Jul 26.

Key Laboratory for Animal Disease-Resistance Nutrition, Ministry of Education, Ministry of Agriculture and Rural Affairs, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China.

Weaning often induces oxidative stress and inflammatory response in piglets. This study investigated the effects of dietary licorice flavonoids powder (LFP) supplementation on antioxidant capacity and immunity in weaned piglets. Notably, 96 Landrace × Yorkshire × Duroc (DLY) weaned piglets were randomly allocated to four treatments with 6 replicates (4 animals per replicate) and fed with diet supplementation with 0, 50, 150, and 250 mg/kg LFP, respectively. Read More

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Biocrust Amendments to Topsoils Facilitate Biocrust Restoration in a Post-mining Arid Environment.

Front Microbiol 2022 26;13:882673. Epub 2022 Jul 26.

School of Biological, Earth and Environmental Sciences, Centre for Ecosystem Science, University of New South Wales Sydney, Kensington, NSW, Australia.

Soil cryptogamic biocrusts provide many ecological functions in arid zone ecosystems, though their natural reestablishment in disturbed areas is slow. Accelerating reestablishment of biocrusts may facilitate the establishment of vascular plant communities within the timeframes of restoration targets (typically 5-15 years). One technique is to inoculate the soil surface using slurries of biocrust material harvested from another site. Read More

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Synthesis of novel alkynyl imidazopyridinyl selenides: copper-catalyzed tandem selenation of selenium with 2-arylimidazo[1,2-]pyridines and terminal alkynes.

Beilstein J Org Chem 2022 19;18:863-871. Epub 2022 Jul 19.

School of Pharmaceutical Sciences, Aichi Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan.

Alkynyl selenides have attracted considerable research interest recently, owing to their applications in the biological and pharmaceutical fields. The Cu-catalyzed tandem reaction for the synthesis of novel alkynyl imidazopyridinyl selenides is presented. A one-pot synthesis route afforded alkynyl imidazopyridinyl selenides in moderate to good yields. Read More

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Natural Materials Modified and Applied to the Detection of Drugs In Situ: Modification of Eggshell and Quantification of Oxytetracycline.

Sensors (Basel) 2022 Aug 1;22(15). Epub 2022 Aug 1.

[email protected]/CEB-Centre of Biological Engineering/LABBELS, School of Engineering, Polytechnic Institute of Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal.

This work describes a novel sensing system using eggshells as substrate for the first time, targeting the detection and semiquantitative determination of antibiotics in waters from aquaculture, enabling simple, inexpensive, and in situ drug monitoring. Eggshell was ground and the resulting powder was modified by adsorption of suitable reagents, and it takes a typical colour after contact with the antibiotic. The colour intensity is correlated with the concentration of the antibiotic. Read More

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VOC Detections by p-Type Semiconducting Sensors Using Nano-Sized SmFeO Particles.

Sensors (Basel) 2022 Jul 27;22(15). Epub 2022 Jul 27.

Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan.

Nano-sized SmFeO particles are prepared by the pyrolysis of heteronuclear cyano-complex, Sm[Fe(CN)]·4HO at a temperature of 600 °C in ozone. The low temperature decomposition followed in ozone successfully yielded fine particles with a high specific surface area of 20.0 m/g (sample A). Read More

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Bimodal-Structured 0.9KNbO-0.1BaTiO Solid Solutions with Highly Enhanced Electrocaloric Effect at Room Temperature.

Nanomaterials (Basel) 2022 Aug 4;12(15). Epub 2022 Aug 4.

School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, China.

0.9KNbO-0.1BaTiO ceramics, with a bimodal grain size distribution and typical tetragonal perovskite structure at room temperature, were prepared by using an induced abnormal grain growth (IAGG) method at a relatively low sintering temperature. Read More

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One-Pot Preparation of HTPB/nNi and Its Catalyst for AP.

Nanomaterials (Basel) 2022 Aug 3;12(15). Epub 2022 Aug 3.

College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.

The liquid phase reduction method is a common method used for preparing nano-nickel powder (nNi). However, the nNi surface is easily oxidized to form nickel oxide film, which affects its performance. In this work, nNi was prepared using anhydrous ethanol as a solvent and hydrazine hydrate as a reducing agent. Read More

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UV-Vis Activated CuO/SnO/WO Heterostructure for Photocatalytic Removal of Pesticides.

Nanomaterials (Basel) 2022 Aug 1;12(15). Epub 2022 Aug 1.

Product Design, Mechatronics and Environmental Department, Transilvania University of Brasov, Eroilor 29 Street, 35000 Brasov, Romania.

A three-steps sol-gel method was used to obtain a CuO/SnO/WO heterostructure powder, deposited as film by spray pyrolysis. The porous morphology of the final heterostructure was constructed starting with fiber-like WO acting as substrate for SnO development. The SnO/WO sample provide nucleation and grew sites for CuO formation. Read More

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Multiwalled Carbon Nanotube/Graphite Powder Film for Wearable Pressure Sensors with High Sensing Performance.

Nanomaterials (Basel) 2022 Jul 30;12(15). Epub 2022 Jul 30.

School of Electrical and Control Engineering, North University of China, Taiyuan 030051, China.

With the continuous progress of artificial intelligence and other manufacturing technologies, there is promising potential for wearable piezoresistive sensors in human physiological signal detection and bionic robots. Here, we present a facile solution-mixing process to fabricate a multiwalled carbon nanotube/graphite powder ([email protected]) film, which has high sensitivity and great linearity and is more oriented to flexible piezoresistive sensors. The sensor consists of two parts: a spinosum microstructure shaped by a sandpaper template and polydimethylsiloxane (PDMS) as the top substrate and interdigital electrodes as the bottom substrate. Read More

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Experimental and Theoretical Study of Fluorescent Properties of Morin.

Molecules 2022 Aug 5;27(15). Epub 2022 Aug 5.

Faculty of Physical and Mathematical Sciences, Autonomous University of Puebla (BUAP), Puebla 72570, Mexico.

Morin () is one of the most widely distributed flavonoids with several beneficial effects on human health, and has the potential of being used as a possible treatment for COVID-19. To achieve a better understanding of the process of dissolution, the fluorescent (FL) emission from solutions prepared with different polar and nonpolar solvents (methanol, DMSO, and chloroform) was measured and compared with the FL emission from powder and crystals. In the FL spectra of the solutions with high concentration, as well as in the spectra of in solid state, two features, at 615 nm and 670 nm, were observed. Read More

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Proximate, Elemental, and Functional Properties of Novel Solid Dispersions of Leaf Powder.

Molecules 2022 Aug 3;27(15). Epub 2022 Aug 3.

Department of Food Science & Technology, Cape Peninsula University of Technology, Bellville 7535, South Africa.

leaf powder (MOLP) is a rich source of antioxidants, protein, minerals, vitamins, and various phytochemicals and has been used to combat malnutrition in many countries. However, despite its many benefits, MOLP has low a solubility in water, necessitating the development of ways to address this issue. To improve the solubility of MOLP, solid-dispersed leaf powders (SDMOLPs) have been developed through freeze-drying, melting, microwave irradiation, and solvent evaporation methods using polyethylene glycols (PEG4000 and PEG6000) (1:1) as hydrophilic carriers. Read More

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