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Halocynthiaroretzi, etc ; aquaculture; blood plasma; cytotoxicity; fish; hemocytes; innate immunity; mortality; shellfish; Show all 9 Subjects
Abstract:
... The infection of the kinetoplastid flagellate Azumiobodo hoyamushi causes soft tunic syndrome that often results in mass mortality in the aquaculture of the edible ascidian Halocynthia roretzi. In the diseased ascidian individuals, the flagellates are exclusively found in the tunic matrix that entirely cover the epidermis, and never invade into internal tissues, such as a mantle. The present study ...
... Halocynthia roretzi has been cultured and utilized as a nutritious seafood in Southeastern Asia for many years because of its abundance active molecules. Here, we reported that feeding of H. roretzi tissues resulted in improving oral glucose tolerance in rats. To screen the active components, we identified 950 chemical compounds from H. roretzi metabolome. Furthermore, 11 molecules with the activi ...
Halocynthiaroretzi, etc ; Haliotis discus; Undaria pinnatifida; abalone; air; fish meal; food composition; macroalgae; marine fisheries; mollusc culture; nutrient content; salinity; specific growth rate; temperature; weight gain; Show all 15 Subjects
Abstract:
... Fish meal (FM) and macroalgae (MA) are the expensive components in abalone feeds, searching for their alternatives is of great interest to abalone aquaculture. Tunic meal of sea squirt (TSS) is one of the marine fishery by-products that contains a variety of nutrients. In this study, we evaluated TSS as a substitute for FM and MA in abalone (Haliotis discus) diet. A total of 27,600 abalones was di ...
Halocynthiaroretzi, etc ; Ciona intestinalis; Styela clava; food research; glycerophospholipids; health promotion; lipid composition; lipidomics; mass spectrometry; Show all 9 Subjects
Abstract:
... Ascidians are excellent, yet underused, marine sources of unique bioactive compounds of high nutritive content. However, reports regarding the lipid composition of ascidians are rare. In this study, using ultra-high-performance liquid chromatography-electrospray ionization-quadrupole time-of-flight mass spectrometry, we aimed to characterize the lipid profile of the tunics and inner body tissues o ...
... Ocean life contains a wealth of bioactive peptides that could be utilized in nutraceuticals and pharmaceuticals. This study aimed to obtain neuroprotective antioxidant peptides in sea squirt (Halocynthia roretzi) through protamex enzymolysis. Fraction F4 (ultrafiltration generated four fractions) had a lower molecular weight (<500 Dalton (Da)) with greater 1,1-diphenyl-2-picrylhydrazyl (DPPH) and ...
Halocynthiaroretzi, etc ; absorption; bioactive properties; body weight; carotenoids; cis-trans isomers; digestion; dosage; drugs; ingestion; intestinal absorption; isomerization; liver; mice; oral administration; small intestine; Show all 16 Subjects
Abstract:
... Halocynthiaxanthin is an acetylenic carotenoid mainly found in Halocynthia roretzi. To date, several bioactivities of halocynthiaxanthin have been reported, but its mechanism of digestion and absorption in mammals has not been studied yet. In this study, we evaluated the intestinal absorption of halocynthiaxanthin in mice. The halocynthiaxanthin-rich fraction was prepared from the tunicate Halocyn ...
Halocynthiaroretzi, etc ; Norovirus; ambient temperature; color; food quality; high pressure treatment; inoculum; meat; pH; Korean Peninsula; Show all 10 Subjects
Abstract:
... Sea squirt (Halocynthia roretzi) is considered a potential cause of human norovirus in Korea. This study investigated the effect of high hydrostatic pressure at 100–500 MPa for 5 min at room temperature (23 ± 2 ℃) on the inactivation of murine norovirus-1 (initial inoculum of 6–7 log₁₀ plaque forming units/ml) as a human norovirus surrogate in fresh sea squirt. The effects of high hydrostatic pres ...
Halocynthiaroretzi, etc ; Haliotis discus; Undaria pinnatifida; abalone; body composition; containers; crude protein; experimental diets; fish meal; growth performance; growth retardation; juveniles; lipids; macroalgae; pellets; specific growth rate; weight gain; Show all 17 Subjects
Abstract:
... Growth performance and the soft body composition of juvenile abalone fed the extruded pellets (EPs) substituting fish meal (FM) and macroalgae (MA) with tunic meal of sea squirt (SS) was investigated. A total of 1,260 abalone were distributed into 18 containers. Six experimental diets were prepared in triplicate. Five diets were pelletized by an extruder pelleter. The 140 g/kg FM and 250 g/kg mixt ...
... Protection of the germline from somatic differentiation programs is crucial for germ cell development. In many animals, whose germline development relies on the maternally inherited germ plasm, such protection in particular at early stages of embryogenesis is achieved by maternally localized global transcriptional repressors, such as PIE-1 of Caenorhabditis elegans, Pgc of Drosophila melanogaster ...
... Tadpole larvae of the ascidian, Halocynthia roretzi, show morphological left–right asymmetry in the brain structures and the orientation of tail bending within the vitelline membrane. Neurula embryos rotate along the anterior–posterior axis in a counterclockwise direction, and then this rotation stops when the left side of the embryo is oriented downwards. Contact of the left-side epidermis with t ...
Halocynthiaroretzi, etc ; chemical composition; coasts; energy balance; fishermen; food consumption; growth performance; particulates; rearing; seasonal variation; spring; summer; tissue weight; tissues; water temperature; winter; South Korea; Show all 17 Subjects
Abstract:
... The broad temperature range on the temperate coast of Korea has led fishermen to develop a unique and specialized procedure for the longline culture of ascidians. In Korea, warming of the coastal sea in winter has accelerated over the past few decades. After warmer winters, the rising temperatures of earlier springs have precluded the rearing of the ascidian spat in the culturing area and have imp ...
Halocynthiaroretzi, etc ; flow cytometry; granulocytes; hemocytes; immune response; lysosomes; phagocytosis; proteinases; Show all 8 Subjects
Abstract:
... Internal defense of ascidians relies, at least partially, on cells circulating in body fluids and infiltrating in tissues, referred to as hemocytes, although structure and composition of ascidian hemocytes still remain unclear. In the present study, we investigated hemocyte types and their functions of the solitary ascidian Halocynthia roretzi using flow cytometry. Based on morphology, cellular ac ...
Halocynthiaroretzi, etc ; Haliotis discus; Saccharina japonica; Undaria; abalone; carcass composition; chemical composition; containers; experimental diets; juveniles; Show all 10 Subjects
Abstract:
... Substitution effect of sea tangle (ST) with tunic of sea squirt (SS) in diet on growth and carcass composition of juvenile abalone was determined. One thousand four hundred and seventy abalones were distributed into 21 containers. Six formulated diets in triplicate were prepared. A 200 g/kg ST was included into the ST0 diet. The 200, 400, 600, 800 and 1000 g/kg of ST were substituted with the same ...
Halocynthiaroretzi, etc ; animals; asymmetry; cilia; eggs; epidermal growth factor; gel chromatography; gene expression; genes; mass spectrometry; membrane proteins; sugars; vitelline membrane; zona pellucida; Show all 14 Subjects
Abstract:
... Stereotyped left–right asymmetry both in external and internal organization is found in various animals. Left-right symmetry is broken by the neurula rotation in the ascidian, Halocynthia roretzi. Neurula embryos rotate along the anterior–posterior axis in a counterclockwise direction, and the rotation stops when the left side of the embryo is oriented downwards, resulting in contact of the left-s ...
Halocynthiaroretzi, etc ; 2,2-diphenyl-1-picrylhydrazyl; acid deposition; antioxidant activity; antioxidants; chromatography; food additives; functional foods; glutathione; hydrolysates; hydrolysis; iron; pH; pepsin; protein hydrolysates; solubilization; tandem mass spectrometry; Korean Peninsula; Show all 18 Subjects
Abstract:
... Sea squirt (Halocynthia roretzi) are widely used as a food material in Korea. Sea squirt protein (SSP) were isolated by alkaline solubilization followed by acidic precipitation. SSP were further hydrolyzed using pepsin hydrolysis at pH 2 for 2 h to release antioxidant peptides. SSP hydrolysates (SSPH) showed DPPH radical scavenging activity of 31 ± 1% at 1 mg/mL, ORAC of 576 ± 1 μM trolox equivale ...
Halocynthiaroretzi, etc ; active food packaging; antimicrobial properties; antioxidant activity; bacteria; bark; bio-packaging; biodegradability; cinnamon; essential oils; melting point; oils; packaging films; permeability; polylactic acid; tensile strength; water solubility; water vapor; Show all 18 Subjects
Abstract:
... Sea squirt (Halocynthia roretzi) shell protein (SSP) was used as a biodegradable film material and laminated with polylactic acid (PLA) to improve its physical and water barrier properties. Cinnamon bark oil (CBO) was incorporated into the SSP film as a bioactive material. After laminating with PLA, the tensile strength and elongation at break of the SSP film increased from 4.07 to 9.09 MPa and fr ...
Halocynthiaroretzi, etc ; Haliotis discus; Undaria; abalone; ash content; body composition; containers; crude protein; experimental diets; fish meal; growth retardation; juveniles; lipids; satiety; Show all 14 Subjects
Abstract:
... The dietary substitution effect of fishmeal (FM) with tunic meal of sea squirt (SS) on growth and body composition of juvenile abalone, Haliotis discus, was evaluated. A total of 1470 juvenile abalone were distributed into 21 70‐L plastic rectangular containers. Six experimental diets in triplicate were prepared, and 20% FM was included in the FM0 diet. The treatments consisted of 20, 40, 60, 80, ...
Halocynthiaroretzi, etc ; death; mortality; parasites; quantitative polymerase chain reaction; Show all 5 Subjects
Abstract:
... BACKGROUND: The kinetoplastid parasite, Azumiobodo hoyamushi, is the causative agent of soft tunic syndrome (STS) in ascidians and leads to their mass mortality in Korean waters. This study was conducted to quantify A. hoyamushi density during the development of STS in the tunics of ascidians (Halocynthia roretzi) using real-time polymerase chain reaction (qPCR). FINDINGS: The infection intensity ...
Halocynthiaroretzi, etc ; cellulose; hydrogen bonding; phase transition; temperature; thermal expansion; Show all 6 Subjects
Abstract:
... Highly crystalline oriented Halocynthia roretzi cellulose Iβ films were investigated by IR-spectroscopy between −180 and +10 °C. Changes in the IR-spectra induced by temperature were compared to published changes induced by mechanical stretching. This made it possible to conclude that frequency shifts in the O–H stretching region of the IR-spectra due to temperature were not predominantly an indir ...
... The inhibitory effects of vanadium-binding proteins (VBPs) from the blood plasma and the intestine of sea squirt on adipogenesis in 3T3-L1 adipocytes were examined. 3T3L-1 cells treated with VBP bₗₒₒd ₚₗₐₛₘₐ decreased markedly the lipid content in maturing pre-adipocytes in a dose-dependent manner, whereas VBP ᵢₙₜₑₛₜᵢₙₑ did not show significant effects on lipid accumulation. Both VBPs did not have ...