Immunohistochemical evaluation and biological role of stromal myofibroblasts in odontogenic keratocyst, dentigerous cyst, and ameloblastoma: A comparative study

2016 ◽  
Vol 5 (7) ◽  
pp. 7
Author(s):  
Swati Roy ◽  
Satevanthan Hemavathy ◽  
Vipul Garg
Diversity ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 4 ◽  
Author(s):  
Jonas O. Wolff

Despite the recognition of spider silk as a biological super-material and its dominant role in various aspects of a spider’s life, knowledge on silk use and silk properties is incomplete. This is a major impediment for the general understanding of spider ecology, spider silk evolution and biomaterial prospecting. In particular, the biological role of different types of silk glands is largely unexplored. Here, I report the results from a comparative study of spinneret usage during silk anchor and dragline spinning. I found that the use of both anterior lateral spinnerets (ALS) and posterior median spinnerets (PMS) is the plesiomorphic state of silk anchor and dragline spinning in the Araneomorphae, with transitions to ALS-only use in the Araneoidea and some smaller lineages scattered across the spider tree of life. Opposing the reduction to using a single spinneret pair, few taxa have switched to using all ALS, PMS and the posterior lateral spinnerets (PLS) for silk anchor and dragline formation. Silk fibres from the used spinnerets (major ampullate, minor ampullate and aciniform silk) were generally bundled in draglines after the completion of silk anchor spinning. Araneoid spiders were highly distinct from most other spiders in their draglines, being composed of major ampullate silk only. This indicates that major ampullate silk properties reported from comparative measurements of draglines should be handled with care. These observations call for a closer investigation of the function of different silk glands in spiders.


Development ◽  
1957 ◽  
Vol 5 (4) ◽  
pp. 377-395
Author(s):  
Gertrude Blumenthal

Recent work has pointed to DNA as either the genetic material of the cell or one of its most essential components. As yet the biological role of the desoxyribonucleases (DNases), the only enzymes known to attack polymerized DNA, has not been established. The distribution of these enzymes throughout the animal and plant kingdoms appears to be widespread, and it is now recognized that they fall into at least two general classes (Schmidt, 1955). If these enzymes are involved in chromosome reduplication or in the genetic or developmental controls which may be attributed to nuclear DNA, it might be expected that the pattern of enzyme activity in rapidly growing, undifferentiated tissue and adult differentiated tissues would differ. For these reasons it was decided to investigate the type of DNase activity found in a developing embryonic system as compared to the activity of adult organs of the same species.


2020 ◽  
Vol 28 (2) ◽  
pp. 298-318
Author(s):  
Roman Girma Teshome

The effectiveness of human rights adjudicative procedures partly, if not most importantly, hinges upon the adequacy of the remedies they grant and the implementation of those remedies. This assertion also holds water with regard to the international and regional monitoring bodies established to receive individual complaints related to economic, social and cultural rights (hereinafter ‘ESC rights’ or ‘socio-economic rights’). Remedies can serve two major functions: they are meant, first, to rectify the pecuniary and non-pecuniary damage sustained by the particular victim, and second, to resolve systematic problems existing in the state machinery in order to ensure the non-repetition of the act. Hence, the role of remedies is not confined to correcting the past but also shaping the future by providing reforming measures a state has to undertake. The adequacy of remedies awarded by international and regional human rights bodies is also assessed based on these two benchmarks. The present article examines these issues in relation to individual complaint procedures that deal with the violation of ESC rights, with particular reference to the case laws of the three jurisdictions selected for this work, i.e. the United Nations, Inter-American and African Human Rights Systems.


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