scholarly journals Drosophila flies combine periodic heartbeat reversal with a circulation in the anterior body mediated by a newly discovered anterior pair of ostial valves and `venous' channels

2007 ◽  
Vol 210 (21) ◽  
pp. 3707-3719 ◽  
Author(s):  
L. T. Wasserthal
Keyword(s):  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yun-Da Li ◽  
Tsung-Ting Tsai ◽  
Chi-Chien Niu ◽  
Po-Liang Lai

AbstractIn some cases of vertebroplasty for adjacent fractures, we observed a cement bridging phenomenon, in which the injected cement flowed from the newly fractured vertebra to the previously cement-augmented vertebra through the space between the abutting anterior longitudinal ligament and the vertebral column. The purpose of this retrospective study was to investigate this phenomenon. From January 2012 to December 2014, patients who sustained new-onset adjacent vertebral compression fracture and who were again treated with vertebroplasty were enrolled. We divided the patients into two groups, the bridging group and the nonbridging group, to analyze the difference between them. Results showed that the cement bridging phenomenon occurred in 18 (22.8%) of the 79 patients. Significant differences between the bridging and nonbridging groups were identified in the following 3 imaging features: severe loss of the anterior vertebral body height at the new-onset adjacent vertebra on plain film (odds ratio [OR] = 4.46, p = 0.014), fluid accumulation (OR = 36.27, p < 0.001) and hypointense signaling (OR = 15.67, p < 0.001) around the space anterior to the abutting vertebral bodies and the corresponding intervertebral disc on MRI. After a 2-year follow-up, both the mean value of the focal kyphotic angle and anterior body height ratio were significantly better in the cement bridging group than in the nonbridging group. The cement bridging phenomenon, which has never been reported in the literature, is not rare in clinical practice. This phenomenon was associated with better maintenance of focal kyphotic angle and anterior body height ratio during the 2-year follow-up.


Development ◽  
1999 ◽  
Vol 126 (4) ◽  
pp. 805-814 ◽  
Author(s):  
C.P. Hunter ◽  
J.M. Harris ◽  
J.N. Maloof ◽  
C. Kenyon

In Caenorhabditis elegans males, a row of epidermal precursor cells called seam cells generates a pattern of cuticular alae in anterior body regions and neural sensilla called rays in the posterior. The Hox gene mab-5 is required for two posterior seam cells, V5 and V6, to generate rays. In mab-5 mutant males, V5 and V6 do not generate sensory ray lineages but instead generate lineages that lead to alae. Here we show that two independent regulatory pathways can activate mab-5 expression in the V cells. First, the caudal homolog pal-1 turns on mab-5 in V6 during embryogenesis. Second, a Wnt signaling pathway is capable of activating mab-5 in the V cells during postembryonic development; however, during normal development Wnt signaling is inhibited by signals from neighboring V cells. The inhibition of this Wnt signaling pathway by lateral signals between the V cells limits the number of rays in the animal and also determines the position of the boundary between alae and rays.


2016 ◽  
Vol 16 (1) ◽  
Author(s):  
Simone V. Gill ◽  
Maureen Ogamba ◽  
Cara L. Lewis
Keyword(s):  

Zootaxa ◽  
2018 ◽  
Vol 4514 (4) ◽  
pp. 583
Author(s):  
CHUNMING WANG ◽  
LIGUO AN ◽  
YONG HUANG

Two new free-living nematode species of the family Xyalidae Chitwood, 1951 found in the East China Sea are described. Daptonema donghaiensis sp. nov. is characterized by epidermal chords of transparent cells present in most parts of the body; amphideal fovea approximately two times head diameter from anterior body end; L-shaped spicules with cephalate proximal end; tubular gubernaculums; and conico-cylindrical tail with long cylindrical portion. Cobbia heterospicula sp. nov. is characterized by slender body, buccal cavity with one dorsal tooth and two small subventral teeth; amphideal fovea far from the anterior body end; spicules that are paired but unequal in size, with right spicule longer and left spicule shorter; gubernaculums with dorsal apophyses; and conico-cylindrical tail with long filiform portion. An identification key to valid species of the genus Cobbia is given. 


Zootaxa ◽  
2018 ◽  
Vol 4500 (4) ◽  
pp. 574 ◽  
Author(s):  
FRANCIANE CEDROLA ◽  
MARIANA FONSECA ROSSI ◽  
ISABEL MARTINELE ◽  
MARTA D’AGOSTO ◽  
ROBERTO JÚNIO PEDROSO DIAS

The genus Metadinium includes ophryoscolecid ciliates, with two retractile ciliary zones in the anterior body portion, two broad skeletal plates, a lobed macronucleus and two contractile vacuoles. Species belonging to this genus were recorded in several geographical locations and in different host species. However, they were mostly described based on a single ciliatological technique, and until now, there is only one description of the infraciliary pattern in Metadinium ciliates (Metadinium medium). The present study performs the morphological and infraciliature characterization of four species belonging to Metadinium: M. esalqum, M. minorum, M. rotundatum and M. ypsilon; and presents taxonomic notes on the genus. The oral infraciliature in these four Metadinium species corresponds to the Diplodinium-type, pattern shared with genera Diplodinium, Diploplastron, Eudiplodinium, Eremoplastron and Polyplastron. A brief review conducted highlights the difficulty of delimiting Metadinium species due to the morphological similarity among them. 


1985 ◽  
Vol 23 (2) ◽  
pp. 203 ◽  
Author(s):  
Young Kee Jang ◽  
Shin Yong Kang ◽  
Suk Il Kim ◽  
Seung Yull Cho
Keyword(s):  

1989 ◽  
Vol 37 (3) ◽  
pp. 1167-1173
Author(s):  
Takumi Nakamura ◽  
Akira Kuge ◽  
Kazuhito Shinohara ◽  
Kenji Fukuda ◽  
Kazuo Hatada ◽  
...  

Zootaxa ◽  
2009 ◽  
Vol 2165 (1) ◽  
pp. 52-58 ◽  
Author(s):  
TAMÍ MOTT ◽  
MIGUEL TREFAUT RODRIGUES ◽  
EDNILZA MARANHÃO DOS SANTOS

A new species of Amphisbaena is described from Fazenda Porto Seguro, municipality of Buique, state of Pernambuco, in the Caatingas of northeastern Brazil based on four specimens. The new species is a small and slender amphisbaenian with four precloacal pores, 333–337 body annuli, 22–23 tail annuli with discrete evidence of an autotomic site on the 10–12 tail annuli, and 14 dorsal and 17–18 ventral segments per annuli at midbody. The high number of body annuli, the presence of chevron-shaped anterior body annuli, and the fusion of frontal scales distinguish Amphisbaena supernumeraria sp. nov. from its congeners.


2016 ◽  
Vol 170 (7) ◽  
pp. 1889-1894 ◽  
Author(s):  
Medis Çöllü ◽  
Şirin Yüksel ◽  
Başak Kumbasar Şirin ◽  
Latif Abbasoğlu ◽  
Yasemin Alanay
Keyword(s):  

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