Search results for "init"

Experimental and fluid dynamic study of continuous supercritical water gasification of glucose

2016

Abstract The supercritical water gasification (SCWG) of glucose as a model compound for H 2 production is studied in term of process development at 25 MPa and 650 °C. Gasification has been investigated using a laboratory scale continuous plant comprising a continuous down flow reactor with a volume of 200 cm 3 , a heat recovery section and pre-heat of the biomass to simulate more closely an industrial design. Feed streams (pure water and glucose solution) are introduced at the top of the vessel and products are extracted from the bottom. The reactor is equipped with various inlet points that allow to modify the inlet position of reacting streams in order to study the effect of stream mixing…

Study of kinetics of the d-pinitol extraction from carob pods using supercritical CO2

2014

Abstract There is a growing interest in the use of d -pinitol ( d -3-O-methyl-chiro-inositol) as a food supplement, thus the use of green and efficient process, such as the supercritical fluid extraction (SFE), to isolate d -pinitol from vegetable raw materials is also an interesting area of research and development. The objective of this work was to study the influence of operating conditions on the SFE of d -pinitol from carob pods. The crucial parameters in SFE, like temperature, pressure, CO 2 flow rate and duration of the process, have been studied. Finally, Naik and Barton models have successfully tested in order to fit the experimental extraction curves.

Aerobic granular sludge treating shipboard slop: Analysis of total petroleum hydrocarbons loading rates on performances and stability

2018

Abstract The work focuses on the feasibility of treating slop with aerobic granular sludge. For this purpose, a 3.5 L granular sequencing batch reactor was activated and it was monitored for 156 days. The experimental campaign was divided into two periods, named Period I (100 days) and Period II (56 days). Total Petroleum Hydrocarbon (TPH) concentration in the slop was, on average, equal to 6.8 ± 1.5 mg L−1 and 13 ± 1.5 mg L−1 in Period I and Period II respectively. The obtained results during the first experimental period indicated that about 80 days were required to reach steady state with mature granules, when TPHs removal efficiency was approximately 90%. The results indicated that both…

Cultivation of granular sludge with hypersaline oily wastewater

2015

The time required to stabilise mature aerobic granules is rather variable. In addition, cultivation time and the structural characteristics of granules seem to be related to the nature of wastewater influent. Granular sludge has been used for the treatment of several industrial wastewaters, but nothing has been reported about wastewater characterized by the simultaneous presence of hydrocarbons and high chloride concentration. In this work, the authors analysed the granulation process and performance as well as the physical characteristics of aerobic granules in two Granular Sequencing Batch Airlift Reactors (GSBARs), fed with acetate-based synthetic wastewater in reactor 1 (R1) and with a …

Application of Liquid-Liquid Partition Chromatography (LLPC) in the Preparation of Steroid Binding Proteins

1989

Two human serum proteins, i.e. sex hormone binding globulin (h-SHBG) and corticosteroid binding globulin (h-CBG), rat corticosteroid binding globulin (r-CBG), and progesterone binding globulin (PBG) from new guinea pig were purified by the application of three different modes of chromatography. The proteins were purified by affinity chromatography and anion exchange chromatography. Fractions containing the steroid binding proteins were finally purified by liquid-liquid partition chromatography on LiParGel 750 (Merck, Darmstadt, FRG). This Chromatographic sequence clearly separated the steroid binding proteins from other proteins, mainly from serum albumin without a loss of protein and compl…

Enantioseparation of phenotiazines by affinity electrokinetic chromatography using human serum albumin as chiral selector

2007

Nowadays, there is a special interest within the pharmaceutical laboratories to develop single enantiomer formulations and consequently a need for analytical methods to determine the enantiomeric purity of drugs. The present paper deals with the enantiomeric separation of promethazine and trimeprazine enantiomers by affinity electrokinetic chromatography (AEKC)-partial filling technique using human serum albumin (HSA) as chiral selector. A multivariate optimization of the most critical experimental variables in enantioresolution, running pH, HSA concentration and plug length, is carried out to obtain enantioresolution of promethazine and trimeprazine. The estimated maximum and optimum resol…

Affinity chromatographic separation of plant lactate dehydrogenase

1978

Abstract Lactate dehydrogenase from potato tubers was purified by the use of several standard purification procedures as well as by affinity chromatography on C

Treg activation and their role in different subtypes of chronic rhinosinusitis

2020

L'appropriation par l'entreprise partenaire des résultats d'une thèse CIFRE : exemple d'une recherche portant sur la formation initiale des sapeurs-p…

2023

Optical studies on the specific interaction of dipyridamole with alpha 1-acid glycoprotein (orosomucoid).

1982

Abstract The interaction of dipyridamole with α1-acid glycoprotein was investigated by circular dichroism and ultraviolet absorbance measurements as well as by equilibrium dialysis experiments. Dipyridamole is bound to the protein via one site of extremely high affinity and by at least one site of considerably lower affinity. Only the association of dipyridamole with the high affinity site produces typical extrinsic Cotton effects. As a result of experimental observations it is concluded that the high affinity site is located in a hydrophobic protein structure of the glycoprotein.