Chromatin Diminution and C-value Enigma | Chapter 6 | Contemporary Research and Perspectives in Biological Science Vol. 3

This work considers non-genic DNA as an element of the genome that allows regulating the frequency of recombination processes during evolution, which allows a species to find the optimal genotype variant corresponding to environmental conditions. From this point of view, chromatin diminution is a special case of genome size change, during which the genome of somatic line cells in multicellular organisms or the somatic nucleus in Protozoa is reduced. A model of the origin of chromatin diminution in cyclops and the role of chromatin diminution in speciation are considered.

 

Author (s) Details

Andrey Grishanin
Papanin Institute for Biology of Inland Waters Russian Academy of Sciences 152742, Borok Yaroslavl Prov., Russia and Department of Biophisics, Faculty of Natural and Engineering Sciences, Dubna State University, Universitetskaya 19, 141980, Dubna, Moscow Prov., Russia.

 

Please see the book here:- https://doi.org/10.9734/bpi/crpbs/v3/2423

3.55-keV Anomaly as the First X-ray Laser in Space| Chapter 10 | Research Trends and Challenges in Physical Science Vol.8

 Under near binary star systems consisting of a red giant and a neutron star, the 3.55-keV Ly-(alpha) line of the hydrogen-like 14Si can be created in a 6x1012 G magnetic field. 14Si ions in the magnetic column of binary neutron stars transmit this recombination radiation to the ground Landau level. In magnetic fields of 4x1012 – 1013 G, the Ly-(alpha) transition energy for hydrogen-like 14Si is computed. If the 3.55-keV line is a laser line, it can be seen up to z (leq) 100 red shifts. This line is most likely an X-ray candle produced by a large amount of silicon in these close binary systems in the universe. Due to the complicated geometry in such binary systems, the 3.55-keV line is unique. Other hydrogen-like ions can also emit laser radiation in the (1–20)-keV energy range. A laser line will always be narrowed. It is also mentioned that there are thermal X-ray sources in space that generate lines in the keV range.

Author(s) Details:

Vladimir Burdyuzha,
Nuclear Physics and Astrophysics Department, Lebedev Physics Institute, Russian Academy of Sciences, Moscow 117997, Russia.

Please see the link here: https://stm.bookpi.org/RTCPS-V8/article/view/6016

Efficiency Enhancement of Cuprous Thiocyanate and Tin Halide based Perovskite Solar Cell Design | Chapter 2 | Recent Developments in Engineering Research Vol.2

 

The toxicity of lead has provoked the researchers to use Tin for the Perovskite’ absorber layer. There
is the ability of high light absorption in Tin Halide Perovskite absorber because of its smaller bandgap
of 1.3 eV, broader visible, and UV region absorption spectrum which results in the enhanced
Quantum Efficiency (QE). The structure is composed of glass/ transparent conductive oxide (TCO)/
titanium dioxide (buffer)/ tin halide Perovskite (Absorber)/ cuprous thiocyanate (HTM)/ Metal back
which has been simulated using SCAPS software. This structure on simulation resulted in Fill Factor
(FF) of 85.17% and Power Conversion Efficiency (PCE) of 28.32%. The optimization of this structure
has been done by the variation of Conduction Band Effective Density of States (CBEDS), total defect
density, Valance Band Effective Density of States (VBEDS), and thickness of the absorber layer.
According to the optimized results, the variation of VBEDS resulted in a significant increment in PCE
to 32.47% and FF to 85.86%.

Author(s) Details

Shiva Sharma
National Institute of Technical Teachers Training and Research, Chandigarh, India.

Dr. Rajesh Mehra
National Institute of Technical Teachers Training and Research, Chandigarh, India.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/236