Autor: Peng, Q. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Beneficial effects and mechanism of lead ion on wolframite flotation
Autorzy:: Yang, S.
Qiu, X.
Peng, T.
Chang, Z.
Feng, Q.
Zhong, C.
Powiązania:: https://bibliotekanauki.pl/articles/109484.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: activator
wolframite
lead ion
benzohydroxamic acid
flotation
Opis:: In this study the effects and mechanism of lead ions influence on wolframite flotation with benzohydroxamic acid (BHA) were studied through micro-flotation, adsorption experiments, zeta potential measurements, logarithmic concentration diagram, and X-ray photoelectron spectroscopy. It was observed that lead ions could significantly enhance the recovery of wolframite in flotation and adsorption density of collector BHA onto the wolframite surface. The results showed that Pb existed in the forms of lead ion, monohydric lead, and lead hydroxide at the water-wolframite interface respectively, at three pH ranges. They increased the zeta potential of wolframite. However, the zeta potential of wolframite was still negative, resulting in repulsive electrostatic force to anionic collector BHA. Combining with XPS spectra, it revealed the chemisorption of BHA onto the wolframite surface. In addition, PbO or Pb(OH)2 was observed on the wolframite surface due to the reaction between lead ions and wolframite. These reaction products increased the adsorption site of BHA on the wolframite surface because Pb-hydroxamate was found on the wolframite surface.
Źródło:: Physicochemical Problems of Mineral Processing; 2016, 52, 2; 855-873
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Improvements in timber production of Chinese fir (Cunninghamia lanceolata) per unit forest area in China via tree breeding: Status and challenges
Autorzy:: Zhou, B.
Peng, D.
Zhao, Q.
Yangnan, S.
Yang, S.
Yang, F.
Qu, G.
Tang, W.
Ou, J.
Xiang, W.
Xiang, J.
Deng, X.
Powiązania:: https://bibliotekanauki.pl/articles/2077649.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: Cunninghamia lanceolata
genetic improvement
timber volumes per unit forest area
wood properties
proposals
recommendations
Opis:: Chinese fir [Cunninghamia lanceolata (Lamb.) Hook] is a fast-growing tree species that is widely planted for timber production in southern China. Many high-quality breeding systems for Chinese fir have been developed using genetic methods. Here, we systematically review progress in increasing Chinese fir timber volumes per unit forest area in China, using genetic methods. We comprehensively assess the objec- tives, strategies, and primary accomplishments of the first to fourth generations of a Chinese fir breeding program. Furthermore, we propose a genetic improvement program and protocol for Chinese fir, and out- line several recommendations with respect to the main challenges associated with using genetic methods to increase timber yields. Finally, we present a series of proposals to increase Chinese fir timber production in China. This review offers insight into genetic improvements that have increased timber volumes of Chi- nese fir over four generations of breeding, and provides direction for future genetic improvements to wood properties.
Źródło:: Dendrobiology; 2020, 83; 43-51
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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