Mining AM (White) Gold:

2021 ◽  
pp. 187-236
Keyword(s):  
Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 542
Author(s):  
Dariusz Kulus ◽  
Natalia Miler

Lamprocapnos spectabilis (L.) Fukuhara (bleeding heart) is valued both in the horticultural and pharmaceutical markets. Despite its great popularity, information on the in vitro tissue culture technology in this species is limited. There is also little knowledge on the application of plant extracts in the tissue culture systems of plants other than orchids. The aim of this study is to compare the utility of traditional plant growth regulators (PGRs) and natural extracts—obtained from the coconut shreds, as well as oat, rice, and sesame seeds—in the micropropagation and cryopreservation of L. spectabilis ‘Gold Heart’ and ‘White Gold’. The biochemical analysis of extracts composition is also included. In the first experiment related to micropropagation via axillary buds activation, the single-node explants were cultured for a 10-week-long propagation cycle in the modified Murashige and Skoog medium fortified either with 1.11 µM benzyladenine (BA) and 1.23 µM indole-3-butritic acid (IBA) or with 10% (v/v) plant extracts. A PGRs- and extract-free control was also considered. In the cryopreservation experiment, the same 10% (v/v) extracts were added into the medium during a seven-day preculture in the encapsulation-vitrification cryopreservation protocol. It was found that the impact of natural additives was cultivar- and trait-specific. In the first experiment, the addition of coconut extract favoured the proliferation of shoots and propagation ratio in bleeding heart ‘Gold Heart’. Rice extract, on the other hand, promoted callus formation in ‘White Gold’ cultivar and was more effective in increasing the propagation ratio in this cultivar than the conventional plant growth regulators (4.1 and 2.6, respectively). Sesame extract suppressed the development of the explants in both cultivars analysed, probably due to the high content of polyphenols. As for the second experiment, the addition of plant extracts into the preculture medium did not increase the survival level of the cryopreserved shoot tips (sesame and oat extracts even decreased this parameter). On the other hand, coconut extract, abundant in simple sugars and endogenous cytokinins, stimulated a more intensive proliferation and growth of shoots after rewarming of samples. Analysing the synergistic effect of conventional plant growth regulators and natural extracts should be considered in future studies related to L. spectabilis.


Gold Bulletin ◽  
1978 ◽  
Vol 11 (2) ◽  
pp. 35-39 ◽  
Author(s):  
Grahame P. O’Connor
Keyword(s):  

2021 ◽  
Author(s):  
Anna Arabindan-Kesson
Keyword(s):  

2017 ◽  
Vol 22 (1-2-3) ◽  
pp. 27-30
Author(s):  
Monica Calderaro ◽  
Marta Senesi
Keyword(s):  

The screen is colored by a celestial sky and begins to outline a castle under whose white gold stands the "Walt Disney Pictures", a semi-crown crown all and the doors of the fantasy are ready to open to the spectators. This is the classic presentation of a Disney Movie that at least once in a lifetime will happen to each of us to attend and accompany the childhood of millions of children. But what is waiting behind that castle? Charming spells and sparks of magic? Absolutely. Princesses to save and charming princes to dream? Absolutely yes. Speaking animals and an Never Land? All this and much more. But if we looked at that castle from a different perspective, and if we shifted our attention from the precious robe of the protagonist, to what deeply motivates her choices and the dynamics surrounding her, we could notice dark shadows, concealed by glittering jewels and unnatural sunsets, so brilliant to blind. The work will focus on those heaviest nuances, analyzing and deepening scenes and themes of Disney Movies where it will be possible to find criminological and psychopathological aspects, thus trying to connect two worlds so distant that for a moment they will intersect as well as in a palette of a painter you can mix white and black. ---------- Lo schermo si colora di un celeste cielo, e comincia a delinearsi un castello sotto la cui bianca aurea si staglia la sigla “Walt Disney Pictures”, un semiarco corona il tutto e le porte della fantasia sono pronte a schiudersi per gli spettatori. Questa è la classica presentazione di un Film Disney a cui almeno una volta nella vita sarà capitato a ciascuno di noi di assistere, e che accompagna l’infanzia di milioni di bambini. Ma cosa ci aspetta dietro quel castello? Affascinanti incantesimi e scintille di magia? Senz’altro. Principesse da salvare e principi azzurri da sognare? Assolutamente sì. Animali parlanti e un’isola che non c’è? Tutto questo e molto di più. Se guardassimo, però, quel castello da una prospettiva diversa, e se spostassimo l’attenzione dal vestito prezioso della protagonista, a ciò che motiva in profondità le sue scelte e alle dinamiche che la circondano, potremmo notare delle sfumature oscure, celate da sfavillanti gioielli ed innaturali tramonti, tanto brillanti da accecarci. È proprio su quelle sfumature più tetre che si concentrerà il lavoro, analizzando e approfondendo scene e temi dei Film Disney in cui sarà possibile riscontrare aspetti criminologici e psicopatologici, cercando così di connettere due mondi tanto distanti che per un attimo si intersecheranno, cosi come in una tavolozza di un pittore è possibile mescolare il bianco e il nero. ---------- La pantalla es de color azul claro del cielo, y comienza a tomar forma un castillo bajo cuyo blanco de oro se coloca la abreviatura "de Walt Disney Pictures", un semi-arco rodea el todo y las puertas de la imaginación están listos para salir del cascarón para los espectadores. Esta es la presentación clásica de una Película de Disney que al menos una vez en la vida nos ha sucedido a cada uno de nosotros para asistir, y que acompaña a millones de niños. Pero, ¿qué está esperando detrás de ese castillo? Encantadores hechizos y chispas de magia? Absolutamente. ¿Princesas para salvar y príncipes azules para soñar? Absolutamente sí ¿Animales que hablan y una isla que no está allí? Todo esto y mucho más. Si observamos, sin embargo, que el castillo desde una perspectiva diferente, y si a mitad de camino a través de la atención por parte del precioso vestido el personaje principal, lo que motiva profundamente en sus elecciones y la dinámica que lo rodean, se puede notar las sombras oscuras, ocultas por las joyas espumoso y puestas de sol antinaturales, tan brillantes para cegar. Es precisamente en los tonos más sombríos que se centrarán los trabajos, analizando y profundizando escenas y películas temas de Disney, donde se pueden encontrar aspectos criminológicos y psicopatológicas, tratando así de conectar dos mundos tan lejos que un momento se cruzará, así como en una paleta de un pintor puede mezclar blanco y negro.


1977 ◽  
Vol 55 (1) ◽  
pp. 149-154 ◽  
Author(s):  
L. C. Archibald ◽  
G. Sanderson
Keyword(s):  

Gold Bulletin ◽  
1979 ◽  
Vol 12 (2) ◽  
pp. 53-57 ◽  
Author(s):  
Maria Rosa Pinasco ◽  
Enrica Stagno
Keyword(s):  

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