Results 1 to 10 of about 164,870 (306)

Is a low sacral ratio associated with primary vesicoureteral reflux in children? [PDF]

open access: yesJournal of Pediatric Nephrology, 2013
Introduction: The association of sacral anomalies with fecal incontinence and lower urinary tract dysfunction is known. The sacral ratio is proposed as a tool for evaluation of sacral development. The aim of this cross-sectional study was to evaluate the prevalence and severity of vesicoureteral reflux in children with a low sacral ratio.\ud \ud ...
Mehdizadeh, Mehrzad   +2 more
openaire   +4 more sources

Relation between reflux ratio and vapour number in distillation processes

open access: yesТонкие химические технологии, 2012
The effect of distillation (rectification) depends completely on reflux ratio. Vapour number depends on reflux ratio.
M. K. Zakharov
doaj   +1 more source

Optimization of the Vacuum Fractional Distillation Process for Enhancing the α-Guaiene of Patchouli Oil with Response Surface Methodology

open access: yesSeparations, 2023
α-guaiene is one of the primary sesquiterpene compounds used as a flavor and fragrance agent in patchouli oil. The fraction of patchouli oil that is rich in α-guaiene has been successfully isolated.
Asri Widyasanti   +3 more
doaj   +1 more source

Liquid mixtures separation and heat consumption in the process of distillation

open access: yesТонкие химические технологии, 2021
Objectives. The aim of this study is to investigate different distillation modes of a binary ideal mixture and determine how various factors affect heat consumption in the column boilers.
M. K. Zakharov   +2 more
doaj   +1 more source

NONADIABATIC RECTIFICATION CONTACT DEVICES [PDF]

open access: yesТехника и технология пищевых производств, 2017
On the basis of the developed method of heat rectification implying partial condensation of the vapor mixture rising along the height of the column and the resulting evaporation of condensate before it is mixed with the main stream of the flowing reflux ...
Voinov N.A., Zemtsov D.A., Zhukova O.P.
doaj   +1 more source

Manufacturing of nanopillar (ultra-dispersed) catalytically active materials through chemical engineering

open access: yesТонкие химические технологии, 2021
Objectives. Catalytically active materials are required in different chemical engineering processes. This makes the development of new materials with high efficiency and original ways in which to obtain them of significant interest.
A. P. Antropov   +4 more
doaj   +1 more source

Catalytic Reactive Distillation for the Esterification Process: Experimental and Simulation [PDF]

open access: yesChemical and Biochemical Engineering Quarterly, 2017
In the present study, methyl acetate has been synthesized using esterification of acetic acid with methanol in a continuous packed bed catalytic reactive distillation col- umn in the presence of novel Indion 180 ion ...
M. Mallaiah, K. A. Kishore, G. V. Reddy
doaj   +1 more source

Prevalence of Helicobacter pylori in patients with gastro-oesophageal reflux disease : systematic review. [PDF]

open access: yes, 2003
Objectives: To ascertain the prevalence of Helicobacter pylori in patients with gastro-oesophageal reflux disease and its association with the disease.
Childs, S.   +3 more
core   +2 more sources

SELECTING THE OPTIMUM SCHEME OF THE SEPARATION OF HYDROCARBON GASES BY DISTILLATION

open access: yesТонкие химические технологии, 2018
The heat costs in distillation columns were determined for the purpose of separating a four-component gas mixture in gas fractionators with various component selection sequences. A method for selecting the optimal scheme was developed. It is based on the
M. K. Zakharov, A. A. Boychuk
doaj   +1 more source

Optimisasi Tekanan dan Nisbah Refluks pada Pemurnian ∆-Guaiena Minyak Nilam (Pogostemon cablin) secara Distilasi Fraksional

open access: yesJurnal Ilmu Pertanian Indonesia, 2022
Patchouli oil is one of Indonesia's important essential oils as an export commodity. Δ-Guaiene is one of the terpenes in the oil, which is shown to have antimicrobial activity against some fungi and bacteria.
Rahmi Rahmawati   +2 more
doaj   +1 more source

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