Temat: Scheffe test - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Prediction of the Properties of Modified Phenol-Formaldehyde Composites Using Mathematical Modeling of the Composition of the Polymer Mixture
Autorzy:: Krasinskyi, Volodymyr
Jachowicz, Tomasz
Malinowski, Rafał
Bajer, Krzysztof
Dulebova, Ludmila
Powiązania:: https://bibliotekanauki.pl/articles/2201811.pdf
Data publikacji:: 2022
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: phenol-formaldehyde resins
epoxy resin
polyvinylpyrrolidone
adhesion strength
regression equation
Scheffe test
Scheffe’s method
Opis:: The paper presents the results of studies of adhesive strength under shearing, thermal stability, and the content of the gel fraction of adhesive materials and enamels based on modified phenol-formaldehyde resins. Epoxy resin and polyvinylpyrrolidone were used to modify the phenol-formaldehyde resin. The influence of the content of components in the phenol-formaldehyde composition and the curing conditions on the properties of the obtained adhesive materials and coatings is analyzed. The effect of polyvinylpyrrolidone on internal stresses in adhesive joints has been established. By mathematical planning, the isolines of the characteristics of composite materials based on modified phenol-formaldehyde resin depending on their component’s compositions are plotted, and the regression coefficients are found, enabling one to get materials with predicted properties. From a technical and economic point of view, the following content of additives in modified phenol-formaldehyde resin is most optimal: epoxy resin from 25 to 50 wt%, polyvinylpyrrolidone from 0.5 to 1.0 wt%, curing catalyst from 1 to 2.5 wt%.
Źródło:: Advances in Science and Technology. Research Journal; 2022, 16, 4; 138--146
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Biological, Physico-Chemical and Morphological Analyses of Four Biochars Derived from Agricultural Waste
Autorzy:: Fetjah, Dounia
Ainlhout, Lalla Fatima Ezzahra
Ihssane, Bouchaib
Houari, Abdellah
Idardare, Zaina
Bouqbis, Laila
Powiązania:: https://bibliotekanauki.pl/articles/1839612.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: banana waste
peanut hull
almond shell
walnut shell
phytotoxic test
SEM
PCA study
Scheffe test
Opis:: Around the world, the increasing population and consumption are placing huge demands on food. Agriculture is considered one of the important sectors in the world and the force to feed humanity. While under these circumstances, which stand out by successive years of drought, degradation of soil, climate change, and global warming, this sector has multifaceted a major issue that goes beyond threatening food security. Thus, Morocco characterized by an arid and semi-arid climate is one example of countries that suffered from those problems. Due to lack of rain, the water resources of some Moroccan arable lands are consumed highly as well as the quality of its soils is now degraded. This issue calls for new approaches to amending the degraded soils in these regions and sustain water supplies. Indeed, biochar can be a remedy for these poor soils; in fact, it has an incredible sequester carbon on soil, a benefit on the environment as well as on plant growth. Despite its virtues, certain biochars contain phytotoxic compounds. In this study, four biochars prepared from banana waste, peanut hull, almond shells, and walnut shells were tested on three plant species (cress to test (HAP), barley for assessing heavy metals, and lettuce to assess salinity) before any field application. The chemical and physical analysis was done for the four biochars and the sandy soil, the four biochars were also analyzed by scanning electron microscopy (SEM) for identifying the morphology of each biochar. The results showed that the four biochars enhanced water holding capacity (WHC), they also revealed the existence of heavy metals especially for almond shells biochar and walnut shells biochar. While for the morphology of each biochar, banana waste biochar (BC-BW) and peanut hull biochar (BC-PeH) had more pores than almond shells biochar (BC-Alm) and walnut shells biochar(BC-WS). Concerning the phytotoxic tests, the lettuce was germinated in all biochars treatments except for the 8% biochar banana treatment, for the cress and barley, all the treatments were grown.
Źródło:: Journal of Ecological Engineering; 2021, 22, 4; 36-46
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Liczba replikacji przy estymacji kontrastów w doświadczeniu z modułem sprężystości miąższu jabłek
The number of replications in estimation of contrasts in an experiment with the module of apple flesh elasticity
Autorzy:: Domagała, D.
Wesołowska-Janczarek, M.
Guz, T.
Powiązania:: https://bibliotekanauki.pl/articles/290714.pdf
Data publikacji:: 2006
Wydawca:: Polskie Towarzystwo Inżynierii Rolniczej
Tematy:: liczebność próby
liczba replikacji
kontrast
przedział ufności Scheffe'go
komora ULO
chłodnia zwykła
moduł sprężystości
test number
number of replications
contrast
Scheffe´s trust range
ULO chamber
ordinary cold store
elasticity module
Opis:: W pracy przedstawiono zastosowanie iteracyjnej procedury wyznaczenia liczebności próby przy ustalonej długości przedziałów ufności Scheffe'go dla kontrastów w doświadczeniu z modułem sprężystości miąższu jabłek trzech odmian przechowywanych w zróżnicowanych warunkach: w chłodni zwykłej lub komorze ULO, z okresem kwarantanny termicznej i bez, a następnie w chłodziarce lub komorze termicznej.
The study presents an application of an iterative procedure in determination of the number of tests at determined length of Scheffe´s ranges of trust for contrasts in an experiment with the module of apple flesh elasticity for three varieties stored in different conditions: in an ordinary cold store or ULO chamber, with the period of thermal quarantine and without, and then in a refrigerator of a thermal chamber.
Źródło:: Inżynieria Rolnicza; 2006, R. 10, nr 7(82), 7(82); 111-118
1429-7264
Pojawia się w:: Inżynieria Rolnicza
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "Scheffe test" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język