About Some Families of Nonexpansive Mappings with respect to Renorming

Acosta-Portilla, Juan Rafael; Hernández-Linares, Carlos Alberto; Pérez-Garcı́a, Vı́ctor M.

doi:10.1155/2016/9310515

Cited by 2 publications

(1 citation statement)

References 12 publications

(12 reference statements)

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“…Cryopreservation (long-term storage) of plant material (seeds, somatic embryos, cell suspensions, callus, branch tips, terminal and lateral buds) is accomplished by storing them at extremely low temperatures (-196 C) for an extended period of time by immersion in liquid nitrogen or (-135 C) for an even shorter period of time by exposing them to the rising vapors of liquid nitrogen. These materials will be genetically stable because the plant is inactive at these temperatures [1][2][3]. Cryopreservation is a method of preserving plant material until it can be restored [4].…”

Section: Introductionmentioning

confidence: 99%

The Importance of Cryoprotective Agents (CPAS) in the Cryopreservation Process for the Preservation of Plant Resources

Al-Jubori,

Mohammed

2024

IOP Conf. Ser.: Earth Environ. Sci.

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The process of vitrification involves the freezing of plant genetic components. It is based on the fact that water can be rapidly cooled to a glassy state by increasing its viscosity to extremely high values without causing intracellular ice crystallization. The genetic material of plants can undergo deleterious changes in structure and function during the cryopreservation process. It is important to remember that cryodamage can occur at any time after ice freezing, not just during the freezing process. Cryopreservation and thawing have been associated with potentially greater changes in DNA integrity. Due to the increased rate of lipid peroxidation and suppression of the antioxidant enzyme defense mechanism, cryopreservation causes oxidative stress. Cryopreservation is particularly damaging to RNA and DNA. The development of cryopreservation technology is due to the discovery of chemicals with preservative properties and protection against freezing damage. These chemicals must be applied to the culture medium for the culture to be preserved in order to prevent the formation of large ice crystals in the plant cells; the sharp edges of these crystals damage the cell walls and membranes and kill the cells.

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Section: Introductionmentioning

confidence: 99%

The Importance of Cryoprotective Agents (CPAS) in the Cryopreservation Process for the Preservation of Plant Resources

Al-Jubori,

Mohammed

2024

IOP Conf. Ser.: Earth Environ. Sci.

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On minimal asymptotically nonexpansive mappings

Acosta-Portilla

Garrido-Ramírez

2023

MATH

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<abstract><p>In this paper we present the following two results: 1.- A characterization of the renorming invariant family of asymptotically nonexpansive mappings defined on a convex, closed and bounded set of a Banach space; 2.- A comparison of the renorming invariant family of asymptotically nonexpansive mappings with the renorming invariant family of nonexpansive mappings. Additionally, a series of examples are shown for general and particular cases.</p></abstract>

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About Some Families of Nonexpansive Mappings with respect to Renorming

Abstract: We characterize the family of nonexpansive mappings which are invariant under renormings and we also compare the families of nonexpansive mappings under two equivalent norms.

Cited by 2 publications

References 12 publications

The Importance of Cryoprotective Agents (CPAS) in the Cryopreservation Process for the Preservation of Plant Resources

The Importance of Cryoprotective Agents (CPAS) in the Cryopreservation Process for the Preservation of Plant Resources

On minimal asymptotically nonexpansive mappings

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