Do effects of ultraviolet radiation on microbial films have indirect effects on larval attachment of the barnacle Balanus amphitrite?

In this form of electron microscopy, photoelectrons emitted from a metal by ultraviolet radiation are accelerated and imaged onto a fluorescent screen by conventional electron optics. image contrast is determined by spatial variations in the intensity of the photoemission. The dominant source of contrast is due to changes in the photoelectric work function, between surfaces of different crystalline orientation, or different chemical composition. Topographical variations produce a relatively weak contrast due to shadowing and edge effects.Since the photoelectrons originate from the surface layers (e.g. ∼5-10 nm for metals), photoelectron microscopy is surface sensitive. Thus to see the microstructure of a metal the thin layer (∼3 nm) of surface oxide must be removed, either by ion bombardment or by thermal decomposition in the vacuum of the microscope.

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Ultrastructural morphology of neurosecretory neurons in the barnacle Balanus amphitrite

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100159710 ◽

1990 ◽

Vol 48 (3) ◽

pp. 434-435

Author(s):

Grazia Tagliafierro ◽

Cristiana Crosa ◽

Marco Canepa ◽

Tiziano Zanin

Keyword(s):

Nervous System ◽

Ultrastructural Level ◽

Uranyl Acetate ◽

Balanus Amphitrite ◽

Neurosecretory Neurons ◽

The Central Nervous System ◽

Ultrathin Sections ◽

Dense Core Granules ◽

The Brain ◽

Ocellar Nerve

Barnacles are very specialized Crustacea, with strongly reduced head and abdomen. Their nervous system is rather simple: the brain or supra-oesophageal ganglion (SG) is a small bilobed structure and the toracic ganglia are fused into a single ventral mass, the suboesophageal ganglion (VG). Neurosecretion was shown in barnacle nervous system by histochemical methods and numerous putative hormonal substances were extracted and tested. Recently six different types of dense-core granules were visualized in the median ocellar nerve of Balanus hameri and serotonin and FMRF-amide like substances were immunocytochemically detected in the nervous system of Balanus amphitrite. The aim of the present work is to localize and characterize at ultrastructural level, neurosecretory neuron cell bodies in the VG of Balanus amphitrite.Specimens of Balanus amphitrite were collected in the port of Genova. The central nervous system were Karnovsky fixed, osmium postfixed, ethanol dehydrated and Durcupan ACM embedded. Ultrathin sections were stained with uranyl acetate and lead citrate. Ultrastructural observations were made on a Philips M 202 and Zeiss 109 T electron microscopy.

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803: Interactions Between Ultraviolet Radiation and Polymorphisms in the Vitamin D Receptor Gene Mediate Prostate Cancer Susceptibility

The Journal of Urology ◽

10.1016/s0022-5347(18)33039-8 ◽

2006 ◽

Vol 175 (4S) ◽

pp. 260-260

Author(s):

Nicholas J. Rukin ◽

Samuel J. Moon ◽

Dhaval Bodiwala ◽

Christopher J. Luscombe ◽

Mark F. Saxby ◽

...

Keyword(s):

Prostate Cancer ◽

Vitamin D ◽

Ultraviolet Radiation ◽

Vitamin D Receptor ◽

Cancer Susceptibility ◽

Receptor Gene ◽

Vitamin D Receptor Gene ◽

Prostate Cancer Susceptibility

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Does Ego-Resilience Impact Friendship Outcomes?

Journal of Individual Differences ◽

10.1027/1614-0001/a000197 ◽

2016 ◽

Vol 37 (2) ◽

pp. 128-134 ◽

Cited By ~ 3

Author(s):

Elizabeth B. Lozano ◽

Mahzad Hojjat ◽

Judith Sims-Knight

Keyword(s):

Social Support ◽

Young Adults ◽

Indirect Effects ◽

Positive Emotions ◽

Positive Outcomes ◽

Ego Resilience ◽

Maintenance Behaviors ◽

Received Social Support ◽

Trait Resilience ◽

The Relationship

Abstract. The present study examined the relationship between resilience and positive outcomes in friendships of young adults. SEM and bootstrapping analyses were performed to test whether positive emotions mediate the relationship between ego-resilience and enhanced friendship outcomes. Findings revealed indirect effects for friendship closeness, maintenance behaviors, and received social support. Our findings demonstrate the importance of positive emotions and its connection with trait resilience in the realm of friendships.

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