scholarly journals Effect of Vitamin-B1 and Vitamin-B12 on the Growth and Carotenoid Content of Haematococcus pluvialis CH-1

2015 ◽  
Vol 7 (9) ◽  
pp. 709-711
Author(s):  
Li-Xin Li ◽  
Zhi-Wei Song ◽  
Shun-Shan Duan ◽  
Ke-Jie Luo ◽  
Ting Li ◽  
...  
Keyword(s):  
Vitamin B12 ◽  
Haematococcus Pluvialis ◽  
Carotenoid Content ◽  
Vitamin B

scholarly journals Molecularly imprinted membrane for transport of urea, creatinine, and vitamin B12 as a hemodialysis candidate membrane

2021 ◽  
Vol 19 (1) ◽  
pp. 806-817
Author(s):  
Muhammad Cholid Djunaidi ◽  
Nabilah Anindita Febriola ◽  
Abdul Haris
Keyword(s):  
Polyethylene Glycol ◽  
Vitamin B12 ◽  
Kidney Function ◽  
Cross Linking ◽  
Vitamin B ◽  
Molecularly Imprinted ◽  
Selective Transport ◽  
Molecularly Imprinted Membrane ◽  
Better Than ◽  
Imprinted Membrane

Abstract High levels of urea and creatinine in the blood are a sign of decreased kidney function. To remove these substances from the blood, hemodialysis which utilizes membranes could be used. In this study, a molecularly imprinted membrane (MIM) was synthesized for the selective transport of urea. The synthesis is initiated with the polymerization of eugenol into polyeugenol and then into polyeugenoxy acetate (PA). The PA is then contacted with urea and then used as the functional polymer in the synthesis of MIM with polysulfone as the membrane base, and polyethylene glycol as the cross-linking agent. The result was later analyzed with FTIR and SEM-EDX. The membrane is then used in the transport of urea, creatinine, and vitamin B12 and then compared with the non-imprinted membrane (NIM) performance. By using UV-Vis spectrophotometry, the results showed that the membrane with 10 h heating variation is able to transport more urea and is more selective than NIM; this proves that the urea template on the MIM enables it to recognize urea molecules better than creatinine and vitamin B12. The order of transport from the best results is urea > creatinine > vitamin B12.

scholarly journals Assessing the Potential of Algae Extracts for Extending the Shelf Life of Rainbow Trout (Oncorhynchus mykiss) Fillets

Foods ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 910
Author(s):  
María I. Sáez ◽  
María D. Suárez ◽  
Francisco J. Alarcón ◽  
Tomás F. Martínez
Keyword(s):  
Rainbow Trout ◽  
Cold Storage ◽  
Haematococcus Pluvialis ◽  
Radical Scavenging ◽  
Storage Period ◽  
Carotenoid Content ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Color Parameters ◽  
Total Carotenoid Content

This study evaluates the potential of different algae extracts (Crassiphycus corneus, Cc; Ulva ohnoi, Uo; Arthrospira platensis, Ap; Haematococcus pluvialis, Hp) as additives for the preservation of rainbow trout fillets. The extracts were prepared with different water to ethanol ratios from the four algae species. The highest ferric reducing antioxidant power (FRAP) was observed in Uo extracted in 80% ethanol. Ap aqueous extract also had considerable FRAP activity, in agreement with a high total phenolic content. Radical scavenging activity (DPPH) was higher in Cc 80% ethanol extract, in agreement with a high total carotenoid content. In fact, when the algae aqueous extracts were assayed on the fish fillets, their antioxidant activity exceeded that of ascorbic acid (ASC). All algae extracts delayed microbial growth and lipid oxidation processes in trout fillets throughout the cold storage period compared to controls, and also improved textural parameters, these effects being more evident for Ap and Hp. With respect to the color parameters, the Hp extract prevented the a* values (redness) from decreasing throughout cold storage, a key point when it comes to colored species, not least salmonids. On the other hand, the Ap extract was not as effective as the rest of treatments in avoiding a* and b* decrease throughout the storage period, and thereby the color parameters were impaired. The results obtained, together with the natural origin and the viability for large-scale cultivation, make algae extracts interesting fish preservative agents for the food industry.

Röntgenspektroskopische Bestimmung der Wertigkeit des Kobalts im Vitamin B12

1954 ◽  
Vol 9 (8) ◽  
pp. 509-513 ◽  
Author(s):  
G. Boehm ◽  
A. Faessler ◽  
G. Rittmayer
Keyword(s):  
Vitamin B12 ◽  
Vitamin B

Mit einem fokussierenden Spektrographen großer Dispersion wird die Lage der K-Röntgen-absorptionskante des Kobalts in verschiedenen Verbindungen untersucht. Die Ergebnisse zeigen, daß es möglich ist, durch Bestimmung der Kantenlage die Wertigkeit des Kobalts in einer Verbindung zu bestimmen. Die Methode gestattet den eindeutigen Nachweis, daß das Kobalt im Vitamin B12 dreiwertig ist.

Preparation of Cod Liver Residues and Vitamin B12 Concentrates

1954 ◽  
Vol 11 (4) ◽  
pp. 355-361 ◽  
Author(s):  
Beryl Truscott ◽  
D. G. Gage ◽  
P. L. Hoogland
Keyword(s):  
Vitamin B12 ◽  
Nutritive Value ◽  
Vitamin B ◽  
Sodium Bisulphite ◽  
Drum Drying ◽  
Different Types

As the first part of an investigation of the nutritive value of cod liver, two methods of preparation of cod liver residue were studied, as well as the effect of drum drying the residue, with and without the presence of sodium bisulphite, defatting the dried residue and extracting vitamin B12 from the dried residue.It was found that Vandenheuvel's method of preparation of residue produces very good results. The fresh residue could be dried without appreciable loss of vitamin B12 activity on a double drum dryer, operated with steam at 20 p.s.i.g. Sodium bisulphite afforded some protection during the drying. The most satisfactory results in defatting were obtained by extraction with dichloroethylene. Concentrates with vitamin B12 activity equivalent to 2–4 micrograms per milliliter were produced by extraction of dried, defatted residue with water and evaporation in vacuo.Five different types of residue were prepared for further studies.

scholarly journals The study of clinical profile and vitamin B 12 in dengue fever patients

2021 ◽  
Vol 12 (7) ◽  
pp. 47-51
Author(s):  
Mamatha Tittamegalapalya Ramalingaiah ◽  
Jeetendra Kumar Jogihalli Mood ◽  
Satyanarayana Narayanashetty ◽  
Rashmi Madappa Bhuvaneshappa
Keyword(s):  
Vitamin B12 ◽  
Hospital Stay ◽  
Dengue Fever ◽  
Platelet Transfusion ◽  
Clinical Profile ◽  
Study Patient ◽  
Vitamin B ◽  
Severe Thrombocytopenia ◽  
Duration Of Hospital Stay ◽  
Vitamin B 12

Background: Dengue is an acute infectious febrile illness characterised by thrombocytopenia and platelet dysfunction leading to bleeding manifestations. Vitamin B12 is required for platelet production in the bone marrow. So, deficiency of vitamin B12 in dengue patients can have severe thrombocytopenia. Aims and Objective: Study was aimed to know the clinical profile of dengue fever patients and to correlate serum vitamin B12 level with severity of thrombocytopenia, platelet transfusion and duration of hospital stay. Materials and Methods: This observational study was done on dengue patients for period of 3 months January 2020 to March 2020. Confirmed cases of dengue fever with NS 1 Ag positive & Ig M antibody positive were included in the study. Patient with sepsis, underlying malignancy, autoimmune disorder, hematological disorder, drugs causing thrombocytopenia were excluded from the study. Appropriate statistical methods were applied. Results: Total 50 subjects were included. Majority of subjects were in the age group 31 to 40 years. 50% were males and females respectively. Most common clinical feature was fever and bleeding manifestations. Mean Vitamin B12 was significantly lower among those with severe thrombocytopenia and highest among those with no thrombocytopenia., there was significant difference in mean Platelet transfusion and duration of hospital stay with respect to severity of Platelet count. Conclusion: Dengue fever patients with vitamin B 12 deficiency had moderate to severe thrombocytopenia and more bleeding manifestations. Those patients required more platelet transfusion and increased duration of hospital stay.

Increased intake of vitamin B12, folate, and omega-3 fatty acids to improve cognitive performance in offspring born to rats with induced hypertension during pregnancy

2018 ◽  
Vol 9 (7) ◽  
pp. 3872-3883 ◽  
Author(s):  
Nisha Kemse ◽  
Anvita Kale ◽  
Preeti Chavan-Gautam ◽  
Sadhana Joshi
Keyword(s):  
Fatty Acids ◽  
Folic Acid ◽  
Docosahexaenoic Acid ◽  
Vitamin B12 ◽  
Cognitive Performance ◽  
Vitamin B ◽  
Omega 3 Fatty Acids ◽  
Omega 3 ◽  
Induced Hypertension

Vitamin B12, folic acid, and docosahexaenoic acid levels are reported to be altered in women with preeclampsia.

Über den Vitamin B12-Gehalt und den Vitamin E-Gehalt der einzelligen Grünalge Scenedesmus obliquus

1958 ◽  
Vol 13 (9) ◽  
pp. 605-610 ◽  
Author(s):  
Hermann Fink ◽  
Elisabeth Herold ◽  
Harry Lundin
Keyword(s):  
Vitamin E ◽  
Vitamin B12 ◽  
Scenedesmus Obliquus ◽  
Vitamin B

In neun Proben der einzelligen Zuchtalge Scenedesmus obliquus, geerntet aus nicht-sterilen Freilandkulturen, wurden Gehalte von Vitamin B12 von 0,02 —1,7 γ/g Trockensubstanz festgestellt. Diese lagen somit wenigstens zwanzig- bis fünfzigmal höher als die von Grünblatt höherer Pflanzen, in denen bisher höchstens Spuren von Vitamin B12 gefunden wurden.Mit den in fünf Chargen gefundenen Werten an Vitamin E von 111—183 γ/g Trockensubstanz entsprach unsere Alge Scenedesmus obliquus etwa Spinat und Weizenkeimlingen, also Pflanzenprodukten mit einem überdurchschnittlichen Gehalt an Vitamin E. Weit überlegen ist sie in dieser Hinsicht tierischen Produkten, z. B. der Milch.Da wir in früheren Studien auch einen sehr hohen biologischen Eiweißwert für das Wachstum der Ratte fanden, muß die Zuchtalge Scenedesmus obliquus, jedenfalls in getrocknetem Zustand, als ein neues interessantes Material von sehr hohem diätetischem Wert angesehen werden, das in seinem ernährungsphysiologischen Verhalten günstige Eigenschaften von tierischen und pflanzlichen Produkten in sich vereinigt.Es ergaben sich keine Anhaltspunkte dafür, den hohen biologischen Wert für das Wachstum nicht in erster Linie dem (verdaulichen) Eiweiß selbst zuzuschreiben und nicht dem Vitamin B12 und Vitamin E der Scenedesmus-Alge.

Cannabis sativa-derived carbon dots co-doped with N–S: highly efficient nanosensors for temperature and vitamin B12

2019 ◽  
Vol 43 (43) ◽  
pp. 17058-17068 ◽  
Author(s):  
Pranav Tiwari ◽  
Navpreet Kaur ◽  
Vinay Sharma ◽  
Hyeonggon Kang ◽  
Jamal Uddin ◽  
...  
Keyword(s):  
Vitamin B12 ◽  
Carbon Dots ◽  
Cannabis Sativa ◽  
Vitamin B ◽  
Highly Efficient ◽  
Co Doped

Cannabis sativa-derived carbon dots as efficient nanosensors for temperature and vitamin B12.

scholarly journals Time-resolved carotenoid profiling and transcriptomic analysis reveal mechanism of carotenogenesis for astaxanthin synthesis in the oleaginous green alga Chromochloris zofingiensis

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Yu Zhang ◽  
Meicheng Shi ◽  
Xuemei Mao ◽  
Yaping Kou ◽  
Jin Liu
Keyword(s):  
Haematococcus Pluvialis ◽  
Value Added ◽  
Carotenoid Content ◽  
Integrated Analysis ◽  
Nitrogen Deprivation ◽  
Time Resolved ◽  
A Value ◽  
Total Carotenoid Content ◽  
Secondary Carotenoids ◽  
Chromochloris Zofingiensis

Abstract Background Chromochloris zofingiensis is emerging as an industrially relevant alga given its robust growth for the production of lipids and astaxanthin, a value-added carotenoid with broad applications. Nevertheless, poor understanding of astaxanthin synthesis has limited engineering of this alga for rational improvements. Results To reveal the molecular mechanism underlying astaxanthin accumulation in C. zofingiensis, here we conducted an integrated analysis by combining the time-resolved transcriptomes and carotenoid profiling in response to nitrogen deprivation (ND). A global response was triggered for C. zofingiensis to cope with the ND stress. Albeit the little variation in total carotenoid content, individual carotenoids responded differentially to ND: the primary carotenoids particularly lutein and β-carotene decreased, while the secondary carotenoids increased considerably, with astaxanthin and canthaxanthin being the most increased ones. The carotenogenesis pathways were reconstructed: ND had little effect on the carbon flux to carotenoid precursors, but stimulated astaxanthin biosynthesis while repressing lutein biosynthesis, thereby diverting the carotenoid flux from primary carotenoids to secondary carotenoids particularly astaxanthin. Comparison between C. zofingiensis and Haematococcus pluvialis revealed the distinctive mechanism of astaxanthin synthesis in C. zofingiensis. Furthermore, potential bottlenecks in astaxanthin synthesis were identified and possible engineering strategies were proposed for the alga. Conclusions Collectively, these findings shed light on distinctive mechanism of carotenogenesis for astaxanthin biosynthesis in C. zofingiensis, identify key functional enzymes and regulators with engineering potential and will benefit rational manipulation of this alga for improving nutritional traits.

Total synthesis of vitamin B12 — a fellowship of the ring

2016 ◽  
Vol 20 (01n04) ◽  
pp. 1-20 ◽  
Author(s):  
G. Wayne Craig
Keyword(s):  
Total Synthesis ◽  
Vitamin B12 ◽  
Cyclic Ether ◽  
Vitamin B ◽  
Porphyrin Molecule ◽  
Cobyric Acid

In the synthesis of cobyric acid following an arduous 60-step synthesis of the tetrapyrrole corrigenolide, Woodward demonstrated that ring cyclization yielded unexpectedly the corrin cyclic ether (Fig. 2). Its structure was chosen as the chemistry logo for the 1970 IUPAC meeting. It was a reminder that chemistry can be capricious and beautiful. This article is a tribute to the 50-year career in porphyrins of Professor Kevin M. Smith and describes his early contributions with colleagues in the synthetic quest of a related porphyrin molecule, vitamin B12 (Fig. 1a).

Sign in / Sign up

Export Citation Format

Share Document