Results 21 to 30 of about 2,439,509 (314)

Greenness of procedures using NADES in the preparation of vegetal samples: Comparison of five green metrics

open access: yesTalanta Open, 2022
The principles of green analytical chemistry have led to the development of analytical procedures that are increasingly sustainable. Different metrics have been created for the evaluation of greenness, although determination of the green nature of new ...
Sabrina S. Ferreira   +9 more
doaj   +1 more source

Two-dimensional heat transfer analysis of timber structure walls filled with hemp-lime composite

open access: yesMATEC Web of Conferences, 2019
Hemp-lime composite is a thermal insulating material used as a filling in timber frame construction walls. It is a material based on the wooden part of industrial hemp stalk (hemp shives) and lime binder.
Brzyski Przemysław   +2 more
doaj   +1 more source

Demographic features of users and uptake of intrauterine contraceptive device (IUCD) and reasons for removal at University of Calabar Teaching Hospital, Nigeria: A 5-year review

open access: yesInternational Journal of Medicine and Health Development, 2022
Background: Intrauterine contraceptive device (IUCD) is an effective long-acting reversible contraceptive method that is suitable for women of reproductive age. Despite this, its uptake by women in Nigeria is not optimum.
Patience O Odusolu   +3 more
doaj   +1 more source

Heavy metal ions removal from oil wastewater using highly enhanced Chitosan membrane technology: a response surface methodology study

open access: yesEQA, 2023
This paper investigates the removal of heavy metal ions from oily wastewater using enhanced Chitosan Membrane. Cellulose and gelatin have been used successfully to modify chitosan.
Wato N. Fundji   +3 more
doaj   +1 more source

Removal of ammoniacal nitrogen from landfill leachate by irrigation onto vegetated treatment planes [PDF]

open access: yes, 2002
Leachate is a contaminated liquor resulting from the disposal of solid and liquid wastes at landfill sites that must be treated before discharge. Vegetated leachate treatment planes have been used at landfill sites in the UK but have received little ...
Tyrrel, Sean F.   +2 more
core   +1 more source

Adsorption of Saliva Related Protein on Denture Materials: An X-Ray Photoelectron Spectroscopy and Quartz Crystal Microbalance Study

open access: yesAdvances in Materials Science and Engineering, 2016
The aim of this study was to evaluate the difference in the adsorption behavior of different types of bovine salivary proteins on the PMMA and Ti QCM sensors are fabricated by spin-coating and sputtering onto bare QCM sensors by using QCM and X-ray ...
Akiko Miyake   +4 more
doaj   +1 more source

Preliminary design of debris removal missions by means of simplified models for low-thrust, many-revolution transfers [PDF]

open access: yes, 2012
This paper presents a novel approach for the preliminary design of Low-Thrust (LT), many-revolution transfers. The main feature of the novel approach is a considerable reduction in the control parameters and a consequent gain in computational speed. Each
Vasile, Massimiliano   +3 more
core   +1 more source

A CFD analysis of different human breathing models and its influence on spatial distribution of indoor air parameters

open access: yesComputer Assisted Methods in Engineering and Science, 2017
The computational fluid dynamics (CFD) analysis of the indoor environment in buildings requires numerical modelling of a human being (computer simulated person - CSP). There are two crucial aspects in developing reliable CSP models: the CSP geometry and
Anna Bulińska, Zbigniew Buliński
doaj   +1 more source

Effect of influent nutrient ratios and hydraulic retention time (HRT) on simultaneous phosphorus and nitrogen removal in a two-sludge sequencing batch reactor process [PDF]

open access: yes, 2009
A laboratory-scale anaerobic–anoxic/nitrification sequencing batch reactor (A2N- SBR) fed with domestic wastewater was operated to examine the effect of varying ratios of influent COD/P, COD/TN and TN/P on the nutrient removal.
Stephenson, Tom   +2 more
core   +1 more source

Chromium(VI) Removal by Polyvinyl Chloride (PVC)/Aliquat-336 Polymeric Inclusion Membranes in a Multiframe Flat Sheet Membrane Module

open access: yesApplied Sciences, 2019
A new multiframe flat sheet membrane contactor module containing several flat membranes was designed and implemented. Each frame contains a chamber (central hole) in which the feed and the receiving phases are put in contact with polyvinyl chloride (PVC)/
Hassina Semghouni   +6 more
doaj   +1 more source

Home - About - Disclaimer - Privacy