Back ground: In the present study Pinealoctomy
was used to study the sympathetic innervations of
the pineal gland by the superior cervical ganglion
(SCG) of the albino rat.
Objective: Following Pinealoctomy, it is
expected to observe the Chromatolysis reaction in
some neurons of the SCG if they were to innervate
the pineal gland (i.e. retrograde Chromatolysis
changes).
Methods: Fifty albino rats were used in this study,
Pinealoctomy was done, then after a different time
interval ganglionectomy was done, in order to
study the Chromatolysis in their cell body.
Result: The present study has demonstrated that
the most obvious Chromatolysis reaction in the
neurons which innervate the pineal gland appeared
one day following Pinealoctomy in the young and
adult rats. In the SCG of animal, one week
following Pinealoctomy,
the number of the Chromatolysis neurons was
much less than these seen in the previously
mentioned one
day animals. In (2 – 6) weeks following
Pinealoctomy, the number of the Chromatolysis
neurons kept a constant decline.
Conclusion: The work presented in this study
showed that the method of tracing the innervations
of the pineal gland by removing the target tissue
(the pineal gland in this study) appeared to be
justified and conclusive.
It has also shown that younger animals, subjected
to Pinealoctomy, would react more vigorously with
respect to Chromatolysis than adult animals. The
present study has also demonstrate that the
distribution of these Chromatolysis neurons and for
all age groups all over the ganglion being
inspected. However they were more abundant in
the rostral 2/3 of these ganglions.
Current research aims to find out:
- Effect of using the active learning in the achievement of third grade intermediate students in mathematics.
- Effect of using of active learning in the tendency towards the study of mathematics for students of third grade intermediate.
In order to achieve the goals of the research, the researcher formulated the following two hypotheses null:
- There is no difference statistically significant at the level of significance (0.05) between two average of degrees to achievement
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The Study aimed to solve the problem through the following question:
1- What are the levels of Political Thinking and Strategic Analysis in the financial ministry?
2- What are the relation ship between the dimensions of Political T
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The researcher reached the following conclusions:
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2- wea
... Show MoreThis paper presents an analysis of selected qualitative characteristics of pellets produced from rape straw obtained from cultivations subjected to different fertilization treatments and from mixtures of straw selected for testing with crude glycerol obtained as a by-product from biodiesel production. The assessment focused on the following qualities of the obtained pellets: Moisture content, mechanical durability, heating value and main elements, that is, carbon, hydrogen, nitrogen, sulphur, chlorine and oxygen. The obtained results indicated that the different treatment regimens applied in spring rape cultivations had a significant impact on the physicochemical qualities of the straw. In terms of the heating value, traditional fer
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The aim of this research is to construct a programming system, which could be used to identify the most important failure modes that are occur in a steam type of power plants. Also the effects and reasons of each failure mode could be analyzed through the usage of this programming system reaching to the basic events (main reasons) that causing each failure mode. The construction of this system for FMEA is dependi
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