Nanobubbles from Ethanol-Water Mixtures: Generation and Solute Effects via Solvent Replacement Method

2018 ◽  
Vol 3 (32) ◽  
pp. 9268-9275 ◽  
Author(s):  
Jeremiah C. Millare ◽  
Blessie A. Basilia
Keyword(s):  
Replacement Method ◽  
Solvent Replacement

scholarly journals Spray dried proliposomes of Rosmarinus officinalis polyphenols: a quality by design approach

2018 ◽  
Author(s):  
Wanderley Pereira Oliveira ◽  
Victor Oloruntoba Bankole ◽  
Claudia Regina F. Souza
Keyword(s):  
Statistical Analysis ◽  
Quality By Design ◽  
Viable Option ◽  
Replacement Method ◽  
Bioactive Content ◽  
Liposomal Suspension ◽  
Solvent Replacement ◽  
Quality By Design Approach ◽  
Central Composite ◽  
Spray Dried

Harnessing the benefits of rosemary polyphenols is limited by variability in their physicochemical properties. These limitations may be overcome by encapsulation in systems possessing hydro-lipophilic centers thereby accommodating molecules of different polarities. Proliposomes offer a viable option in this regards, being particles which form liposomal suspension in water. Lyophilized extracts of rosemary was encapsulated in hydrogenatedsoyphosphatidylcholine/cholesterol by solvent replacement method. Spray dried proliposomes were obtained with lactose as carrier. Using Central Composite Design, the effects of lipid, extract and carrier concentrations on response variables including bioactive content and retention, moisture content characteristics, recuperation and redispersibility were evaluated by statistical analysis. Keywords: Polyphenols; antioxidant;  proliposomes; spray drying

Distributed AMELSB Replacement Method For Text Hiding

2018 ◽  
pp. 1
Author(s):  
Yossra H. Ali ◽  
Tayseer S. Atia ◽  
Ahmed Y. Yousif
Keyword(s):  
Replacement Method

scholarly journals The Influence of Dynamic Replacement Method on the Adjacent Soil

2017 ◽  
Vol 16 (10) ◽  
pp. 1515-1522
Author(s):  
Jerzy Sękowski ◽  
Sławomir Kwiecień ◽  
Piotr Kanty
Keyword(s):  
Replacement Method ◽  
Dynamic Replacement ◽  
Adjacent Soil

The aquation of cis-Chlorodi(methyl sulphoxide)bisethylenediaminecobalt(III), cis-Chlorodimethylformamidebisethylenediaminecobalt(III), and cis-Chlorodimethylacetamidebisethylenediaminecobalt(III) ions

1966 ◽  
Vol 19 (10) ◽  
pp. 1821 ◽  
Author(s):  
IR Lantzke ◽  
DW Watts
Keyword(s):  
Solvent Molecule ◽  
Chloride Ion ◽  
Side Reaction ◽  
Base Hydrolysis ◽  
Alkaline Solutions ◽  
Replacement Reaction ◽  
Ph Values ◽  
Trigonal Bipyramidal ◽  
Entropy Of Activation ◽  
Solvent Replacement

The aquation of each of three octahedral chloro(solvent)bisethylene- diaminecobalt(III) ions, involving the solvent ligands dimethyl sulphoxide (DMSO), dimethylformamide (DMF), and dimethylacetamide (DMA), has been examined in solutions of different pH. In solutions of pH less than 6, the predominant reaction is replacement of the solvent molecule by water in an SN1 process, involving a trigonal bipyramidal transition state and resulting in a mixture of the trans- and cis- chloroaquo complexes. The slow loss of chloride ion is an accompanying side reaction. In solutions of pH greater than 6 base hydrolysis becomes important, and in alkaline solutions the rate of solvent loss is too fast to measure by conventional techniques. The rate of liberation of chloride ion is also greatly increased with increasing pH. Values of the activation energy, and entropy of activation, are reported for the solvent replacement reaction at a pH of 1.90.

Crystallization and preliminary structural studies of Scilla campanulata lectin complexed with α1–6 mannobiose

1998 ◽  
Vol 54 (1) ◽  
pp. 90-92 ◽  
Author(s):  
Lisa M Wright ◽  
Stephen D. Wood ◽  
Colin D. Reynolds ◽  
Pierre J. Rizkallah ◽  
Anthony K. Allen
Keyword(s):  
Molecular Replacement ◽  
X Rays ◽  
Synchrotron Source ◽  
Replacement Method ◽  
Cell Dimensions ◽  
Molecular Replacement Method ◽  
Hanging Drop Method ◽  
Unit Cell Dimensions ◽  
Antiretroviral Activity ◽  
Image Plate System

Recent work has shown that Scilla campanulata agglutinin from bluebell bulbs has a strong affinity for α(1,3)- and α(1,6)-linked mannosyl residues and possesses moderate antiretroviral activity. This lectin has been crystallized by the hanging-drop method of vapour diffusion complexed with the disaccharide mannose-α1,6-D-mannose. The crystals are in the space group P21212 with unit-cell dimensions a = 70.63, b = 92.79 and c = 47.25 Å, and with a dimer in the asymmetric unit. The crystals diffract X-rays to beyond 1.5 Å resolution at 277 K and are stable in an X-ray beam. Data to 1.6 Å resolution have been collected using a MAR image-plate system at a synchrotron source and the structure of the complex has been solved by the molecular replacement method.

Fresh State Behaviour of Cement Paste Containing Nano Kaolin

2014 ◽  
Vol 925 ◽  
pp. 28-32 ◽  
Author(s):  
Muhd Sidek Muhd Norhasri ◽  
M.S. Hamidah ◽  
A. Mohd Fadzil ◽  
A.G. Abd Halim ◽  
M.R. Zaidi
Keyword(s):  
Surface Area ◽  
Cement Paste ◽  
Setting Time ◽  
High Energy ◽  
Major Effect ◽  
Cement Replacement ◽  
High Energy Milling ◽  
Replacement Method ◽  
Fresh State ◽  
State Behaviour

The application of nanomaterials in cement by replacement method in concrete is becoming a trend in cement research. The utilisation of nanosilica, nanoalumina, titanium oxide and others are proven to enhance properties of concrete. The major effect of nanomaterials is its size in which it contributes to the packing theory due to increase in the surface area. nanokaolin which comes from kaolin, was tansformed to the nanoform by using high energy milling. The process of developing nanokaolin by using high energy milling is referred to process top to bottom approach in nanoprocessing technique. In this research, the nanokaolin will be used as an additive in cement by 7% weight of cement. Four (4) cement replacement materials catered by using metakaolin on weight basis from 0, 10%, 20% and 30% will also be adopted. To determine the fresh state, cement paste contains nanokaolin and metakaolin are tested its standard consistency and setting time. The effect of the inclusion of the nanokaolin as additive in cement paste that also contains metakaolin as cement replacement material will be investigated. It was found the inclusion of 7% nanokaolin increases the water demand of the cement paste level of metakaolin replacement. In addition to that, the setting time namely initial and final set was been delayed as compared to that of plain OPC. The nanoparticles of nanokaolin and also finer particles of metakaolin increase the surface area and refining the internal structure of cement paste which reduce the flow capabilities of cement paste containing nanokaolin and metakaolin.

scholarly journals Cloning, expression, purification, crystallization and preliminary X-ray diffraction analysis of AerF fromMicrocystis aeruginosa, a putative reductase participating in aeruginosin biosynthesis

2015 ◽  
Vol 71 (4) ◽  
pp. 466-470 ◽  
Author(s):  
Ruyi Ding ◽  
Cui Xu ◽  
Xu Chen ◽  
Mengyun Bao ◽  
Xiaoting Qiu
Keyword(s):  
Diffraction Analysis ◽  
Biosynthetic Pathway ◽  
Molecular Replacement ◽  
X Ray Diffraction ◽  
Antithrombotic Activity ◽  
X Ray ◽  
Cell Parameters ◽  
Maximum Resolution ◽  
Replacement Method ◽  
Molecular Replacement Method

The 2-carboxy-6-hydroxyoctahydroindole moiety is an essential residue for the antithrombotic activity of aeruginosins, which are a class of cyanobacteria-derived bioactive linear tetrapeptides. The biosynthetic pathway of the 2-carboxy-6-hydroxyoctahydroindole moiety has not yet been resolved. AerF was indicated to be involved in the biosynthesis of the 2-carboxy-6-hydroxyoctahydroindole moiety. This study reports the cloning, expression, purification, crystallization and preliminary X-ray diffraction analysis of AerF fromMicrocystis aeruginosawith a C-terminal His6tag. The crystal diffracted to a maximum resolution of 1.38 Å and belonged to the tetragonal space groupP4322, with unit-cell parametersa=b= 101.581,c= 116.094 Å. The calculated Matthews coefficient and solvent content of the crystal were 2.47 Å3 Da−1and 50.32%, respectively. The initial model of the structure was obtained by the molecular-replacement method and refinement of the structure is in progress.

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