scholarly journals Effect of unsaponifiable lipid components from the red alga Porphyra tenera on pancreatic carboxylesterase activity toward triacetin in vitro.

1983 ◽  
Vol 47 (2) ◽  
pp. 383-387
Author(s):  
Takeshi KOMURA ◽  
Hideo NAGAYAMA
Keyword(s):  
Red Alga ◽  
Porphyra Tenera ◽  
Lipid Components

Phytochrome in Red Alga, Porphyra tenera

Nature ◽  
1967 ◽  
Vol 215 (5108) ◽  
pp. 1411-1412 ◽  
Author(s):  
M. J. DRING
Keyword(s):  
Red Alga ◽  
Porphyra Tenera

scholarly journals Biological activity of the red alga Laurencia brandenii

2011 ◽  
Vol 70 (1) ◽  
pp. 81-90 ◽  
Author(s):  
Aseer Manilal ◽  
Sugathan Sujith ◽  
Balu Sabarathnam ◽  
George Kiran ◽  
Joseph Selvin ◽  
...  
Keyword(s):  
Biological Activity ◽  
Biological Activities ◽  
Sitophilus Oryzae ◽  
Red Alga ◽  
Culture Collection ◽  
Gas Chromatography Mass Spectrometry ◽  
Human Pathogens ◽  
Active Fraction ◽  
Renewable Natural Resource

Biological activity of the red algaLaurencia brandeniiThe marine red algaLaurencia brandeniicollected from the southwest coast of India (Indian Ocean) was extracted and fractioned using column chromatography. The individual fractions were evaluatedin vitrovia antimicrobial activity against six species of Microbial Type Culture Collection and three species of clinical human pathogens, antipest activity onSitophilus oryzae, maggoticidal activity against 2ndinstar larvae ofSarcophagasp. and termiticidal activity againstMicrotermes obesi.It was found that the fraction eluted using petroleum ether:chloroform (6:4) exhibited broader biological activities. The phyco-constituents of the active fraction were identified by gas chromatography-mass spectrometry (GC-MS) analysis. The GC-MS profile of the active fraction revealed that the main constituent was octadecadienoic acid (49.75%) followed by n-hexadecanoic acid (14.24%), which might have a functional role in the biological activities. The overall activity profile envisages that these bioactive compounds fromL. brandeniicould be utilized as a renewable natural resource for the development of novel environmental-compatible formulations for the control of human pathogens, pests, termites and maggots.

Structure and in vitro antitumor activity evaluation of brominated diterpenes from the red alga Sphaerococcus coronopifolius

2010 ◽  
Vol 18 (3) ◽  
pp. 1321-1330 ◽  
Author(s):  
Vangelis Smyrniotopoulos ◽  
Constantinos Vagias ◽  
Céline Bruyère ◽  
Delphine Lamoral-Theys ◽  
Robert Kiss ◽  
...  
Keyword(s):  
Antitumor Activity ◽  
Red Alga ◽  
Activity Evaluation

Erratum to “identification of antimutagenic substances in an extract of edible red alga, Porphyra tenera (Asadusa-nori)”

1996 ◽  
Vol 103 (2) ◽  
pp. 241
Author(s):  
Tasuji Okai ◽  
Kiyoka Higashi-Okai ◽  
Yoshihisa Yano ◽  
Shuzo Otani
Keyword(s):  
Red Alga ◽  
Porphyra Tenera

scholarly journals Nitrogen content, dietary fiber, and digestibility in algal food products

2010 ◽  
Vol 28 (No. 1) ◽  
pp. 27-35 ◽  
Author(s):  
L. Mišurcová ◽  
S. Kráčmar ◽  
B. Klejdus ◽  
J. Vacek
Keyword(s):  
Dietary Fiber ◽  
Green Algae ◽  
Total Nitrogen ◽  
Brown Algae ◽  
Food Products ◽  
In Vitro Digestibility ◽  
Algal Food ◽  
Porphyra Tenera ◽  
Nitrogen Contents

The basic nutritional aspects and parameters of freshwater and marine algal food products are described. Blue-green algae (<I>Spirulina pacifica, S. platensis</I>), green algae (<I>Chlorella pyrenoidosa</I>), red algae (<I>Palmaria palmata, Porphyra tenera</I>), and brown algae (<I>Eisenia bicyclis, Hizikia fusiformis, Laminaria japonica, Undaria pinnatifida</I>) were used for this purpose. The ash content, total nitrogen, dietary fibers, and in vitro digestibility of the above-mentioned algal species were studied. The ash contents amounted to 8–11% (for freshwater) and 9–33% (for marine) of the weights of the algal samples. The total nitrogen contents were analysed using a modified Winkler’s method; in the process, higher nitrogen contents were observed in freshwater algae than in marine ones. For the analysis of dietary fiber contents, the instrument Ankom<sup>220</sup> Fibre Analyser was used. The marine brown algae species were generally assigned higher contents of dietary fiber than the freshwater algal products. The results of the dietary fiber analysis differed with the methodologies used. Pepsin, pancreatin, and a combination of both were applied for the study of <I>in vitro</I> digestibility. Generally, brown algae showed the worst digestibility in comparison with other algal food products.

Freeze-Fracture Observations of Hamster Sperm-Egg Fusion

1988 ◽  
Vol 46 ◽  
pp. 280-281
Author(s):  
Judy Clark ◽  
James K. Koehler
Keyword(s):  
In Vitro Fertilization ◽  
Freeze Fracture ◽  
Fusion Process ◽  
Thin Sections ◽  
Vitro Fertilization ◽  
Fertilization System ◽  
Sem Studies ◽  
Lipid Components

A number of TEM and SEM studies have made use of the hamster in vitro fertilization system to observe the process of sperm-egg fusion. We have extended these studies to include observations of freeze fracture replicas at the site of the sperm-egg interactions prior to, during and immediately following their fusion.Zona-free eggs were collected following superovulation of female hamsters according to the methods of Yanagimachi et al. Sperm were capacitated and prepared for incubation with eggs as in Clark et al. Eggs and sperm were co-incubated 5-15 minutes, washed and immediately fixed and prepared for freeze fracture replicas and thin sections as previously reported.In order to investigate the role of lipid components during the fusion process, some preparations were fixed in the presence of filipin, which binds to β-OH sterols in membranes and forms complexes that are visible in freeze fracture replicas. Thin sections were also prepared and viewed to help confirm and support observations of the replicas.

In vitro assay and light regulation of nitrate reductase in red alga Gracilaria chilensis

2004 ◽  
Vol 161 (7) ◽  
pp. 769-776 ◽  
Author(s):  
Fungyi Chow ◽  
Mariana C de Oliveira ◽  
Marianne Pedersén
Keyword(s):  
Nitrate Reductase ◽  
Light Regulation ◽  
Red Alga ◽  
In Vitro Assay ◽  
Vitro Assay ◽  
Gracilaria Chilensis
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