Soft-tissue anatomy of an Orsten-type phosphatocopid crustacean from the Cambrian Furongian of China revealed by synchrotron radiation X-ray tomographic microscopy

Fossils of Orsten-type preservation represented by Skara and Phosphatocopida have been reported from the Cambrian Furongian of Western Hunan, China. Their taxonomy and external morphology are well known, but their internal soft-tissue anatomy has not been revealed yet. With the application of synchrotron radiation X-ray tomographic microscopy, here we describe the internal soft-tissue anatomy of an Orsten-type preserved phosphatocopid crustacean assigned to Hesslandona angustata. The internal organs and tissues of this specimen were collapsed after death to form a visceral mass situated within the labrum and underneath the sternal cuticle. The visceral mass contains the digestive system, including digestive tract and possible digestive glands. The digestive tract starts from the mouth, followed by oesophagus (foregut) and midgut, whereas the hind gut and anus are unknown due to incomplete preservation. Two bilaterally symmetric knob-like structures beside the midgut may be digestive glands (midgut diverticula). The visceral mass also contains other structures that may be related to nerve tissues and/or muscles, but identification as specific organs or tissues is uncertain.

Download Full-text

Exceptionally Preserved Cambrian Trilobite Digestive System Revealed in 3D by Synchrotron-Radiation X-Ray Tomographic Microscopy

PLoS ONE ◽

10.1371/journal.pone.0035625 ◽

2012 ◽

Vol 7 (4) ◽

pp. e35625 ◽

Cited By ~ 9

Author(s):

Mats E. Eriksson ◽

Fredrik Terfelt

Keyword(s):

Synchrotron Radiation ◽

Digestive System ◽

X Ray ◽

Cambrian Trilobite

Download Full-text

Soft-tissue anatomy of an Orsten-type phosphatocopid crustacean from the Cambrian Furongian of China revealed by synchrotron radiation X-ray tomographic microscopy (project)

MorphoBank datasets ◽

10.7934/p3564 ◽

2019 ◽

Keyword(s):

Synchrotron Radiation ◽

Soft Tissue ◽

X Ray

Download Full-text

PERKEMBANGAN SALURAN DAN SISTEM PENCERNAAN PADA LARVA IKAN TUNA SIRIP KUNING, Thunnus albacares (Bonnaterre, 1788)

Jurnal Riset Akuakultur ◽

10.15578/jra.13.4.2018.309-316 ◽

2019 ◽

Vol 13 (4) ◽

pp. 309

Author(s):

Gunawan Gunawan ◽

Jhon Harianto Hutapea ◽

Ananto Setiadi ◽

Ketut Mahardika

Keyword(s):

Water Temperature ◽

Digestive Tract ◽

Digestive System ◽

Single Type ◽

Thunnus Albacares ◽

Straight Tube ◽

Internal Organs ◽

Mature Fish ◽

D 20 ◽

Kidney Liver

Penelitian ini bertujuan untuk mengetahui perkembangan saluran dan sistem pencernaan pada larva ikan tuna sirip kuning Thunnus albacores (Bonnaterre, 1788). Sampel larva diambil setiap hari dari larva baru menetas (D-0) sampai D-13, dan selanjutnya dilakukan sampling pada D-15 dan D-20. Semua sampel di foto dengan program ACT-1 dan diproses secara histologi. Hasil pengamatan menunjukkan larva D-0 belum memiliki saluran pencernaan, mulut, dan mata belum terbuka. Pada D-1 saluran pencernaan mulai terbentuk, tetapi masih dalam bentuk tabung lurus. Mulut larva mulai terbuka pada D-2 (45 jam setelah menetas pada suhu air pemeliharaan 28°C). Kuning telur sudah diserap sepenuhnya pada D-3, saluran dan organ pencernaan seperti mulut, esofagus, lambung, ginjal, hati, pankreas, usus, rektum, dan anus sudah terbentuk. Pada D-5 mulai muncul mikro philli pada usus untuk mengabsorbsi nutrisi. Sel-sel penyusun hati, jantung, saluran pencernaan sudah tumbuh dan berkembang menyerupai organ ikan dewasa, ditandai adanya pakan dalam usus. Saluran dan sistem pencernaan telah berdiferensiasi menjadi organ dalam seperti pada ikan dewasa pada hari ke-6 (D-6) dan akan sempurna pada D-20 dengan TL ± 2 cm. Berdasarkan perkembangan pencernaan, maka pakan awal berupa rotifer sebaiknya diberikan pada hari ke-2 (43 jam setelah menetas pada suhu air 28°C).The aim of this study was to observe the development of tract and digestive system on yellowfin tuna larvae. Tuna larvae were collected daily from rearing tank at hatching day 0 (D-0) to 13 (D-13). Samples of larvae were selected at D-15 and D-20. All samples were observed under light microscopy, documented and then histologically processed. The results showed that the digestive tract began to form on the larvae at day-1 which was still in the form of a straight tube. The mouth of the larvae starts to open on D-2 (45 hours after hatching at a water temperature of 28°C). At D-3, the larvae’s yolk sac was fully absorbed, and its intestine contained a single type of food which was rotifer. The digestive tract and internal organs were formed such as the mouth, esophagus, stomach, kidney, liver, pancreas, intestine, rectum, and anus which indicated that the larvae can eat and digest food. At D-5, microvilli began to develop in the intestine to absorb nutrients. The cells of the liver, heart, digestive tract had grown and evolved to resemble that of mature fish organs characterized by feed in the gut. The tract and digestive system have differentiated into internal organs such as in adult fish at D-6 and fully developed in D-20 with TL ± 2 cm. Based on the present finding, it is suggested that the initial feeding of tuna larvae using zooplankton (rotifer) could be done at day two (43 hours) post-hatching at a water temperature of 28°C.

Download Full-text

Lateral soft tissue neck X-rays: are they useful in management of upper aero-digestive tract foreign bodies?

The Journal of Laryngology & Otology ◽

10.1017/s0022215107000497 ◽

2007 ◽

Vol 122 (8) ◽

pp. 845-847 ◽

Cited By ~ 17

Author(s):

A Karnwal ◽

E C Ho ◽

A Hall ◽

N Molony

Keyword(s):

Soft Tissue ◽

Digestive Tract ◽

Foreign Bodies ◽

Junior Doctors ◽

X Rays ◽

Inclusion Criteria ◽

X Ray ◽

Soft Tissue Neck ◽

Radiology Training ◽

Accident And Emergency

AbstractObjectives:To assess the value of lateral soft tissue neck X-rays in patients presenting with upper aero-digestive tract foreign bodies.Design:Retrospective study.Inclusion criteria:(1) Patients referred to the ENT team, via either the accident and emergency department or their general practitioner; (2) a history of a non-aspirated, upper airway, aero-digestive tract foreign body; and (3) a lateral soft tissue neck X-ray taken on admission.Results:A total of 62 patients met the inclusion criteria. Twenty-four patients (38.7 per cent) had positive findings on lateral soft tissue neck X-ray. ‘Soft’ signs, such as widened pre-vertebral shadow and loss of lordosis, were seen in all 24 patients, and foreign bodies were visualised in six patients. Overall, lateral soft tissue neck X-rays were helpful in the management of 32 patients (51.6 per cent). Rather worryingly, doctors in the accident and emergency and ENT departments missed 79.2 and 66.6 per cent of the positive findings, respectively.Conclusions:A lateral soft tissue neck X-ray is a helpful tool in the management of patients presenting with upper aero-digestive tract foreign bodies. Junior doctors need better radiology training.

Download Full-text

Detection of lead in bone phantoms and arsenic in soft tissue phantoms using synchrotron radiation and a portable x-ray fluorescence system

Physiological Measurement ◽

10.1088/1361-6579/aa513f ◽

2017 ◽

Vol 38 (2) ◽

pp. 374-386 ◽

Cited By ~ 4

Author(s):

Craig Groskopf ◽

Stephen R Bennett ◽

Mihai R Gherase ◽

David E B Fleming

Keyword(s):

Synchrotron Radiation ◽

Soft Tissue ◽

X Ray ◽

Tissue Phantoms

Download Full-text

Direct Observation of Monolayer Zones in Al-wt 4% Cu

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100178823 ◽

1990 ◽

Vol 48 (1) ◽

pp. 14-15

Author(s):

B. Jouffrey ◽

D. Dorignac ◽

A. Bourret

Keyword(s):

Solid Solution ◽

Synchrotron Radiation ◽

Direct Observation ◽

Supersaturated Solid Solution ◽

Original Model ◽

X Ray ◽

Image Position

Since the early works on GP zones and the model independently proposed by Preston and Guinier on the first steps of precipitation in supersaturated solid solution of aluminium containing a few percent of copper, many works have been performed to understand the structure of different stages in the sequence of precipitation.The scheme which is generally admitted can be drawn from a work by Phillips.In their original model Guinier and Preston analysed a GP zone as composed of a single (100) copperrich plane surrounded by aluminum atomic planes with a slightly shorter distance from the original plane than in the solid solution.From X-ray measurements it has also been shown that GP1 zones were not only copper monolayer zones. They could be up to a few atomic planes thick. Different models were proposed by Guinier, Gerold, Toman. Using synchrotron radiation, proposals have been recently made.

Download Full-text