in this study, the vibration of cracked plates is investigated using the differential quadrature method and experimental modal analysis. the crack, which is assumed to be open, is modeled by the extended rotational spring. with its finite length, the crack divides the plate into six segments. then, the differential quadrature is applied to the governing differential equations of motion and the ...

Modulating the boundary layer velocity profile is a very promising strategy for achieving transition delay and reducing friction of plate. By perturbing flow with counter-rotating vortices that undergo transient, non-modal growth, streamwise-aligned streaks are formed inside layer, which have been proved (theoretical experimentally) to be robust structures. In this paper, we employ efficient nu...

Photoacoustic imaging is an emerging noninvasive imaging technique with great potential for a wide range of biomedical imaging applications. However, with few-view data the filtered back-projection method will create streak artifacts. In this study, the regularized iterative weighted filtered back-projection method was applied to our photoacoustic imaging of the optical absorption in phantom fr...

A method is described of determining the state of retinal correspondence by means of an ordinary streak retinoscope used to produce a modified after-image test.

An experimental study was made of the distribution of the primary hypoblastic cells in the lower layer of the avian blastoderm throughout primitive streak formation and until stage 10 (Hamburger & Hamilton, 1951). The primary hypoblast of stage XIII (Eyal-Giladi & Kochav, 1976) chick blastoderms was exchanged for either an [H3]thymidine-labelled similar chick hypoblast, or a quail primary hypob...

We have isolated a chicken cDNA clone, Cnot, resembling in sequence and expression pattern the Xenopus homeobox gene Xnot. The major, early transcription domains of Cnot are the node, the notochord and prenodal and postnodal neural plate caudal from the prospective hindbrain level. All these cell populations appear to be descendants of the Cnot-expressing cells of the node, suggesting a cell li...

A microsurgical grafting technique has been used to introduce primordial germ cell (PGC) precursors into intact primitive-streak-stage mouse embryos in vitro. Operated embryos were cultured for 36-40 h and then analysed by a combined histochemical and autoradiographic method. PGC chimaerism occurred in embryos that received grafts of caudal primitive streak cells but not adjacent embryonic endo...

The body plan of the vertebrate embryo is established during gastrulation by the formation of mesoderm, separating the ectodermal and endodermal germ layers. Embryonic mesoderm, formed in the primitive streak, migrates anteriorly and is divided along the mediolateral axis into distinct populations including axial, paraxial, intermediary and lateral plate mesoderm. The antagonistic activities of...

purpose: to present a case of pseudoxanthoma elasticum (pxe) with ocular involvement and visual loss. case report: a 36 year old male presented with severe visual loss since 2 years ago. on funduscopy peau d’orange appearance and angioid streaks were evident. the diagnosis of pxe was confirmed by skin biopsy of papular lesions on the neck. conclusion:  ocular findings may be helpful in the diag...

Abstract. Nofiani R, Rizky, Briliantoro Ardiningsih P. 2021. Anti-bacteria and toxicity potential of a rare Actinobacterium Pseudonocardia sp. SM1A, isolated from Mangrove Park, West Kalimantan, Indonesia. Biodiversitas 23: 453-458. This study aimed to identify evaluate antibacterial activities mangrove mud, Mempawah District, Kalimantan. The mud sample was inoculated on ISP4 agar dissolved wit...