Search results for " Structures"
showing 10 items of 4162 documents
Myo-inositol counteracts the vegetalizing effect of lithium on P.lividus embryos
1992
Abstract The vegetalizing effect of LiCl on sea urchins embryos can be counteracted by the addition of myo-inositol. This observation is discussed in connection with similar results recently reported for amphibian embryos.
OATS AND FAT-FREE MILK BASED FUNCTIONAL FOOD PRODUCT
2001
The present study addresses problems and solutions related to new functional bio-active food product creation. Commercial rolled oats and fat-free milk were used as raw materials. Limited enzymatic hydrolysis of oat starch was carried out by α-amylase. The lactic acid bacteria strains Lactobacillus acidophilus, Bifidobacterium sp., and commercial starter cultures ABT-1 were cultivated in enzymatically hydrolysed oat mash. Lactobacillus acidophilus was a more active producer of lactic acid, while Bifidobacterium sp. improved the taste properties. A fat-free milk additive was applied to stabilise the texture of the oat mash, and increase the protein content of the final product. All procedure…
First Descriptions of Larva and Pupa of
2019
In this paper, the mature larva and pupa of Bagous claudicans are described and illustrated for the first time. Measurements of younger larval instars are also given. The biology of the species is discussed in association with larval morphology and feeding habits. Overall larval and pupal morphological characters of the genus Bagous are presented. Confirmation of the larva identification as Bagous claudicans species was conducted by cytochrome oxidase I (COI) sequencing. DNA barcoding was useful for specimen identification of larval stages. The systematic position of the species within the Bagous collignensis-group, based on morphological and molecular results, is also discussed.
Organometallic complexes in ascidian embryonic development: II. Effects on different stages and larvae
1993
The effects of the organometallic compounds Bu2Sn-D-(−;)sorbitol, Bu2Sn-D-(+)glucose, Bu2Sn-D-(−)fructose and Bu2Sn-D-(+)glyceraldehyde were tested in vivo on different stages of Ascidian development, larval movement and metamorphosis. Organotin(IV) complexes are organometallic compounds widely used as industrial biocides, antifouling agents and agricultural fungicides and are toxic to a range of organisms. Two-cell stage embryos, if incubated for one hour in the organotin (IV) solutions, stopped the cleavage, which was restored when they were transferred into normal sea water. The gastrula stage was seriously affected in 10−4mol dm−3 solutions of the above-mentioned complexes: 85% of the e…
A study on the effect of the inhibition of polyadenylylation on the production of giant cytoplasmic RNA in sea urchin embryos.
1975
It is suggested that inhibition of RNA polyadenylylation in sea urchin mesenchyme blastulae causes a disturbance of the transport of all the size classes of newly synthesized RNA from the nucleus to the cytoplasm.
Histones and non-histone proteins during sea urchin development
1979
Abstract Chromatin from blastulae and plutei of Paracentrotus lividus was fractionated through a hydroxyapatite column. The ratio of histones versus non-histone proteins decreases from blastula to pluteus stage.
Cell Envelopes of Methanogens
2010
Methanogens play an important role in the global carbon cycle, because they are involved in the last step of anaerobic degradation of organic material to methane. Although the first report on methane emanation from aquatic muds was given by Alessandro Volta in the year 1776, the first methanogen was not obtained in pure culture before 1947. Special culture techniques had to be developed for growing the strict anaerobic methanogenic isolates. The methanogens were the first species of the archaeal domain (Archaea) detected. Their unique biochemical and genetic properties have stimulated basic investigations of this microbial group in the last three decades. The methanogenic Archaea possess a …
Neuropeptidome regulation after baculovirus infection. A focus on proctolin and its relevance in locomotion and digestion
2020
AbstractBaculoviruses constitute a large group of invertebrate DNA viruses, predominantly infecting larvae of the insect order Lepidoptera. During a baculovirus infection, the virus spreads throughout the insect body producing a systemic infection in multiple larval tissues. Some behavioral and physiological changes in lepidopteran larvae have been described following a baculovirus infection and those changes could be connected with alterations in the host’s central nervous system (CNS). As a main component of the CNS, neuropeptides are small protein-like molecules functioning as neurohormones, neurotransmitters or neuromodulators. These peptides are involved in regulating animal physiology…
Technostress and Social Networking Services: Uncovering Strains and Their Underlying Stressors
2017
Numerous users of social networking sites and services (SNS) suffer from technostress and its various strains that hinder well-being. Despite a growing research interest on technostress, the extant studies have not explained what kinds of various strains can SNS use create and how can these strains be traced back to different stressors. To address this gap in research, we employed a qualitative approach by narrative interviews. As a contribution, our findings introduce four SNS strains (concentration problems, sleep problems, identity problems, and social relation problems) and explain how they link with different underlying SNS stressors. As practical implications, the findings of this stu…
Hsp60 in Inflammatory Disorders
2019
Heat shock proteins (HSP) including HSP60 are immunogenic proteins shared by particular microbial agents and mammals. HSP60 has been implicated in multiple inflammatory disorders and autoimmune diseases mostly through its interactions with the immune system. Such diseases include inflammatory bowel disease, chronic obstructive pulmonary disease, Hashimoto’s thyroiditis, myasthenia gravis, multiple sclerosis and even atherosclerosis plaques among others. It is present in the cytosol, cell membrane, cell surface as well as in the extracellular space and in the circulation. As a super antigen, HSP60 has the dual role as an immunomodulator and as a biomarker, a node molecule in balance between …