How many people know that viruses aren't alive??

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👋🏻

In response The Mac to his Publication
In response The Mac to his Publication

An automated procedure was developed to determine the geometrical and chemical interactions of crystalline virus particles using the crystal parameters, particle position, orientation, and atomic coordinates for an icosahedral asymmetric unit.

In response The Mac to his Publication

Two applications of the program are reported: (1) An analysis of a novelpseudo-rhombohedral (R32) symmetry present in the monoclinic crystal lattices of both Nodamura Virus (NOV) and Coxsackie virus B3 (CVB3). The study shows that in both cases the interactions between particles is substantially increased by minor deviations from exact R32 symmetry and that only particles with the proper ratio of dimensions along twofold and fivefold symmetry axes (such as southern bean mosaic virus) can achieve comparable buried surface area in the true R32 space group.

In response The Mac to his Publication

(2) An attempt was made to correlate biological function with remarkably conserved interparticle contact regions found in different crystal forms of three members of the nodavirus family, NOV, Flock House Virus (FHV), and Black Beetle Virus (BBV). Mutational evidence implicates the quasi-threefold region on the viral surface in receptor binding in nodaviruses and this region is dominant in particle contacts in all three virus crystals.

In response The Mac to his Publication

Examination of particle contacts in numerous crystal structures of viruses in the picornavirus superfamily showed that portions of the capsid surface known to interact with a receptor or serve as an epitope for monoclonal antibodies frequently stabilize crystal contacts.

In response The Mac to his Publication

A photoreceptor cell is a specialized type of neuroepithelial cell found in the retina that is capable of visual phototransduction. The great biological importance of photoreceptors is that they convert light (visible electromagnetic radiation) into signals that can stimulate biological processes.

In response The Mac to his Publication

chloroplast; plural noun: chloroplasts
a plastid in green plant cells which contains chlorophyll and in which photosynthesis takes place.

In response The Mac to his Publication
In response The Mac to his Publication

Viruses can infect bacteria.

In response The Mac to his Publication

What is the Difference between Viruses and Bacteria?

Living or Not

Viruses are not living organisms, bacteria are.

In response The Mac to his Publication

Magnetite is a mineral and one of the main iron ores, with the chemical formula Fe3O4. It is one of the oxides of iron, and is ferrimagnetic; it is attracted to a magnet and can be magnetized to become a permanent magnet itself. It is the most magnetic of all the naturally occurring minerals on Earth. Naturally magnetized pieces of magnetite, called lodestone, will attract small pieces of iron, which is how ancient peoples first discovered the property of magnetism.

In response The Mac to his Publication

"can be magnetized to become a permanent magnet itself."

In response The Mac to his Publication

The mass spectrometer is an instrument which can measure the masses and relative concentrations of atoms and molecules. It makes use of the basic magnetic force on a moving charged particle.

In response The Mac to his Publication

As surface FeII may be oxidized or otherwise unavailable, initial photoactivation may be needed to trigger the Fenton reactivity...

In response The Mac to his Publication

Conclusions
In this work, effective phenol degradation was obtained upon irradiation of magnetite in the presence of H2O2 (heterogeneous photo-Fenton conditions). The initially low reaction rate considerably increased as the reaction progressed, most likely because of: (i) the formation of intermediates such as HQ that are able to reduce FeIII to FeII, which takes part to the Fenton reaction, and (ii) the presence of dissolved Fe due to magnetite dissolution, both in dark and under irradiation.

In response The Mac to his Publication

The need of FeIII reduction, which is also supported by the important role of irradiation, might look surprising when considering that magnetite contains structural FeII. It is thus possible that the latter is not readily available for the Fenton reaction and that some form of initial activation (e.g. partial iron photodissolution) is needed.

In response The Mac to his Publication

On the other hand, phenol degradation was most effectively achieved by the samples having the highest content of structural FeII. The size of the primary particles seems to be less important, because it was not correlated with photo-Fenton activity in the studied samples. However, the size effect could be largely offset by important aggregation phenomena in the aqueous suspensions.
From an applicative point of view, the most interesting features of magnetite as shown in this study are:

In response The Mac to his Publication

 Reactivity upon absorption of UVA radiation, which makes cheap sunlight potentially
applicable to carry out the reaction.
 Ability of some samples (most notably S2 and S3) to maintain reactivity also under
circumneutral pH conditions, which could save the need to adjust and back-adjust pH.
 Limited iron leaching (up to or below the ppm range), which keeps dissolved Fe safely below
the limits for wastewater discharge.
 Magnetic behavior, which greatly helps in the separation of magnetite from treated wastewater.

In response The Mac to his Publication

Abstract

The present work shows the photocatalytic degradation of nitrobenzene (NB) using Fe3O4 magnetic nanoparticles (MNP) as a photocatalyst in the presence of UV light.

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In response The Mac to his Publication
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In response The Mac to his Publication
In response The Mac to his Publication
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In response The Mac to his Publication

Hypnosis: According to the theories of psychologist Ronald Stone and the biomedical engineering models of Itshak Bentov, hypnosis is basically ‘a technique which permits acquisition of direct access to the sensory motor cortex and pleasure centers, and lower cerebral (emotional) portions (and associated pleasure centers) of the right side of the human brain following successful disengagement of the stimulus screening function of the left hemisphere of the brain.

In response The Mac to his Publication

The left hemisphere of the brain is the self-cognitive, verbal and linear reasoning component of the mind. It fulfills the function of screening incoming stimuli by categorizing, assessing and assigning meaning prior to allowing passage to the right hemisphere of the mind. The right hemisphere, which functions as the noncritical, holistic, nonverbal and pattern-oriented component of the brain appears to accept what the left hemisphere passes to it without question.

In response The Mac to his Publication

Consequently, if the left hemisphere can be distracted either through boredom or through reduction to a soporific, semi-sleep state, external stimuli to include hypnotic suggestions are allowed to pass unchallenged into the right hemisphere where they are accepted and acted upon directly.

The result may involve an emotional reaction originating in the lower cerebral region, sensory/motor responses requiring involvement of the cortex, and so on. Both the sensory and the motor cortices of the right cerebral portion of the brain contain a sequence of points known as the “homunculus” which corresponds to points in the body (see Exhibit 1).

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