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https://read.qxmd.com/read/36616043/evaporation-caused-invaginations-of-acoustically-levitated-colloidal-droplets
#1
JOURNAL ARTICLE
Hongyue Chen, Yongjian Zhang, Heyi Wang, Xin Dong, Duyang Zang
Controlled buckling of colloidal droplets via acoustic levitation plays an important role in pharmaceutical, coating, and material self-assembly. In this study, the evaporation process of PTFE colloidal droplets with two particle concentrations (60 wt% and 20 wt%) was investigated under acoustic levitation. We report the occurrence of surface invagination caused by evaporation. For the high particle concentration droplet, the upper surface was invaginated, eventually forming a bowl-shaped structure. While for the low particle concentration droplet, both the upper and lower surfaces of the droplet were invaginated, resulting in a doughnut-like structure...
December 27, 2022: Nanomaterials
https://read.qxmd.com/read/33814403/reconstructive-functional-reservoirs-in-treatment-of-children-with-aganglionosis-after-total-colectomy
#2
JOURNAL ARTICLE
V Prytula, O Kurtash
The object of the study is to develop optimal reconstructive functional reservoirs for the treatment of children with aganglionosis after total colectomy. Since 1980 till 2020 we have been treating 53 children up to 3 years with aganglionosis after total colectomy using optimal reconstructive surgery technique lying in the formation of a functional intestinal reservoir. Colostomy was performed as the first stage of surgical treatment of all children. Effective ways of restoring the integrity of the intestinal tract after a total colostomy with creating of functionally advantageous circumstances for reservoirs formation were presented as "J" - reservoirs (n=2); ileotransplant with lateral ileo-ileoanastomosis (n=34); ileotransplant with lateral ileo-colonoastomosis (n=7); ileorectal primary anastomosis (n=1) or entero-enteroanastomosis with an invagination valve (n=8) or implantation of an ileocecal valve (n=1)...
February 2021: Georgian Medical News
https://read.qxmd.com/read/27119770/enhanced-cellular-uptake-of-bowl-like-microcapsules
#3
JOURNAL ARTICLE
Huiying Li, Wenbo Zhang, Weijun Tong, Changyou Gao
Among several properties of colloidal particles, shape is emerging as an important parameter for tailoring the interactions between particles and cells. In this study, bowl-like multilayer microcapsules were prepared by osmotic-induced invagination of their spherical counterparts in a concentrated polyelectrolyte solution. The internalization behaviors of bowl-like and spherical microcapsules were compared by coincubation with smooth muscle cells (SMCs) and macrophages. The bowl-like capsules tended to attach onto the cell membranes from the bend side and could be enwrapped by the membranes of SMCs, leading to a faster uptake rate and larger accumulation inside cells than those of their spherical counterparts...
May 11, 2016: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/26930660/morphological-diversity-of-the-rod-spherule-a-study-of-serially-reconstructed-electron-micrographs
#4
JOURNAL ARTICLE
Shuai Li, Joe Mitchell, Deidrie J Briggs, Jaime K Young, Samuel S Long, Peter G Fuerst
PURPOSE: Rod spherules are the site of the first synaptic contact in the retina's rod pathway, linking rods to horizontal and bipolar cells. Rod spherules have been described and characterized through electron micrograph (EM) and other studies, but their morphological diversity related to retinal circuitry and their intracellular structures have not been quantified. Most rod spherules are connected to their soma by an axon, but spherules of rods on the surface of the Mus musculus outer plexiform layer often lack an axon and have a spherule structure that is morphologically distinct from rod spherules connected to their soma by an axon...
2016: PloS One
https://read.qxmd.com/read/18271633/embryogenesis-in-the-reef-building-coral-acropora-spp
#5
JOURNAL ARTICLE
Nami Okubo, Tatsuo Motokawa
Embryogenesis in the reef building corals Acropora intermedia, A. solitaryensis, A. hyacinthus, A. digitifera, and A. tenuis was studied in detail at the morphological level, and the relationships among the animal pole, blastopore, and mouth were investigated for the first time in corals. These species showed essentially the same sequence of development. The embryo undergoes spiral-like holoblastic cleavage despite the presence of a dense isolecithal yolk. After the morula stage, the embryo enters the "prawn-chip" stage, which consists of an irregularly shaped cellular bilayer...
December 2007: Zoological Science
https://read.qxmd.com/read/18248579/novel-ultrastructures-of-treponema-primitia-and-their-implications-for-motility
#6
JOURNAL ARTICLE
Gavin E Murphy, Eric G Matson, Jared R Leadbetter, Howard C Berg, Grant J Jensen
Members of the bacterial phylum Spirochaetes are generally helical cells propelled by periplasmic flagella. The spirochete Treponema primitia is interesting because of its mutualistic role in the termite gut, where it is believed to cooperate with protozoa that break down cellulose and produce H(2) as a by-product. Here we report the ultrastructure of T. primitia as obtained by electron cryotomography of intact, frozen-hydrated cells. Several previously unrecognized external structures were revealed, including bowl-like objects decorating the outer membrane, arcades of hook-shaped proteins winding along the exterior and tufts of fibrils extending from the cell tips...
March 2008: Molecular Microbiology
https://read.qxmd.com/read/15672391/female-genital-system-of-the-folding-trapdoor-spider-antrodiaetus-unicolor-hentz-1842-antrodiaetidae-araneae-ultrastructural-study-of-form-and-function-with-notes-on-reproductive-biology-of-spiders
#7
JOURNAL ARTICLE
Peter Michalik, Wencke Reiher, Marika Tintelnot-Suhm, Frederick A Coyle, Gerd Alberti
The genitalia of the female folding-trapdoor spider Antrodiaetus unicolor are characterized by two pairs of spermathecae that are arranged in a single row and connected to the roof of the bursa copulatrix. Each single spermatheca is divided into three main parts: stalk, bowl, and bulb, which are surrounded by the spermathecal gland. The epithelium of the spermathecal gland is underlain by a muscle meshwork and consists of different types of cells partly belonging to glandular cell units (Class 3 gland cells) that extend into pores in the cuticle of the stalk and bowl...
March 2005: Journal of Morphology
https://read.qxmd.com/read/14597202/the-odd-skipped-family-of-zinc-finger-genes-promotes-drosophila-leg-segmentation
#8
JOURNAL ARTICLE
Irene Hao, Ryan B Green, Olga Dunaevsky, Judith A Lengyel, Cordelia Rauskolb
Notch signaling controls formation of joints at leg segment borders and growth of the developing Drosophila leg. Here, we identify the odd-skipped gene family as a key group of genes that function downstream of the Notch receptor to promote morphological changes associated with joint formation during leg development. odd, sob, drm, and bowl are expressed in a segmental pattern in the developing leg, and their expression is regulated by Notch signaling. Ectopic expression of odd, sob, or drm can induce invaginations in the leg disc epithelium and morphological changes in the adult leg that are characteristic of endogenous invaginating joint cells...
November 15, 2003: Developmental Biology
https://read.qxmd.com/read/12203725/extensive-vascularization-of-developing-mouse-ovaries-revealed-by-caveolin-1-expression
#9
JOURNAL ARTICLE
Monica Bullejos, Jo Bowles, Peter Koopman
Expression screening for genes preferentially expressed in mouse fetal ovaries relative to testes identified Cav-1 as a candidate female-specific gene. Cav-1 encodes caveolin-1, a component of the cell membrane invaginations known as caveolae, which are involved in lipid regulation and signal transduction. In situ hybridization revealed high levels of Cav-1 mRNA in developing ovaries, compared with moderate or low levels in testes. Analysis of caveolin-1 protein distribution by immunofluorescence showed this difference to be due to the development of a dense and complex vascular network in the developing ovary...
September 2002: Developmental Dynamics
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