Microwave irradiation mediated synthesis of needle-shaped hydroxyapatite nanoparticles as a flocculant for Chlorella vulgaris

2019 ◽  
Vol 17 ◽  
pp. 203-206 ◽  
Author(s):  
Davoodbasha MubarakAli
Keyword(s):  
Microwave Irradiation ◽  
Chlorella Vulgaris ◽  
Hydroxyapatite Nanoparticles

scholarly journals Reactions of substituted furo[3,2-b]pyrrole-5-carboxhydrazides and their biological activity

2005 ◽  
Vol 3 (4) ◽  
pp. 622-646 ◽  
Author(s):  
Renata Ga<parová ◽  
Daniel Zbojek ◽  
Margita Lácová ◽  
Katarína Král'ová ◽  
Anton Gatial ◽  
...  
Keyword(s):  
Biological Activity ◽  
Reaction Time ◽  
Electron Transport ◽  
Microwave Irradiation ◽  
Chlorophyll Content ◽  
Chlorella Vulgaris ◽  
Photosynthetic Electron Transport ◽  
Imidazole Derivatives ◽  
Spinach Chloroplasts

AbstractThe reactions of substituted furo[3,2-b]pyrrole-5-carboxhydrazides 1 with 5-arylfuran-2-carboxaldehydes 2, 4,5-disubstituted furan-2-carboxaldehydes 3 and thiophene-2-carboxaldehyde 4 has been studied. The advantage of microwave irradiation on some of these reactions was reflected in the reduced reaction time and increased yields. Reactions of 1 with 4-substituted 1,3-oxazol-5(4H)-ones 11 led to diacylhydrazines 13 or to imidazole derivatives 14 depending on the temperature. 1,2,4-Triazole-3-thione 17 was synthesized by two-step reaction of 1 with phenylisothiocyanate and subsequent base-catalyzed cyclization of thiosemicarbazide 16. The effects of hydrazones 5–10 on inhibition of photosynthetic electron transport in spinach chloroplasts and chlorophyll content in the antialgal suspensions of Chlorella vulgaris were investigated.

scholarly journals Microwave Irradiation Assisted Supercritical Carbon Dioxide Extraction of Bio-Oils from Chlorella Vulgaris Microalgae

2019 ◽  
Vol 7 (4.14) ◽  
pp. 221
Author(s):  
S. N. Ibrahim ◽  
K. A. Radzun ◽  
K. Ismail
Keyword(s):  
Carbon Dioxide ◽  
Fatty Acids ◽  
Supercritical Carbon Dioxide ◽  
Optimum Condition ◽  
Microwave Irradiation ◽  
Chlorella Vulgaris ◽  
Saturated Fatty Acids ◽  
Biodiesel Production ◽  
High Yield ◽  
Supercritical Carbon

Chlorella vulgaris is one of the promising microalgae strains that can produce high yield of bio-oils. The C. vulgaris was pretreated with microwave irradiation prior to extraction using supercritical carbon dioxide (SCCO2). Fourier transform infrared spectroscopy (FTIR) analysis showed microwave irradiation pretreatment does not affect the material composition of C. vulgaris. Scanning electron microscopy (SEM) of the microwave irradiation pretreated microalgae showed an agglomeration of the cells with the cells shape became distorted due to rupturing of the cell walls. Optimization of the SCCO2 process parameters (pressure, temperature and CO2 flow rate) was performed by using response surface methodology (RSM) with central composite design (CCD). Two factors significantly affecting the extraction yield were temperature and pressure. The model equation also predicted the optimum condition for the SCCO2 (without microwave pretreatment) at 70 , 5676 psi and 7 sL/ min while optimum condition for SCCO2 (microwave irradiation pretreatment) at 63 , 5948 psi and 10 sL/ min. High amount of saturated fatty acids (SFA), monounsaturated fatty acids (MUFA), -linolenic acid and palmitoleic acid were found in the extracted oil with microwave irradiation pre-treatment sample.  In addition, the polyunsaturated fatty acids (PUFA) content in the microwave irradiation pretreated oil was considerably low and is desirable for biodiesel production. 

Preparation of Calcium-Deficient Carbonated Hydroxyapatite Nanoparticles by Microwave Process

2008 ◽  
Vol 368-372 ◽  
pp. 1178-1180
Author(s):  
Song Chen ◽  
Jin Gou Ji ◽  
Yi Xu ◽  
Wei Qi Liu ◽  
Ji Da Chen ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Microwave Power ◽  
Ph Value ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Synthesis Process ◽  
Hydroxyapatite Nanoparticles ◽  
Molar Ratios ◽  
Reaction Solution ◽  
Microwave Process

In this paper, carbonated calcium-deficient hydroxyapatite (d-HA) nanoparticles were synthesized by a chemical precipitation method assisted with microwave irradiation. The important factors which effected on the synthesis process, such as pH value, time and the power of microwave irradiation on the Ca/P molar ratios of d-HA were discussed. The experimental results showed that carbonated d-HA nanoparticles could be quickly synthesized by irradiating the reaction solution for about 1h under moderate microwave power and pH value ranging from 8 to 9.

In-Situ Transesterification of Chlorella vulgaris Using Carbon-Dot Functionalized Strontium Oxide as a Heterogeneous Catalyst under Microwave Irradiation

2016 ◽  
Vol 30 (12) ◽  
pp. 10602-10610 ◽  
Author(s):  
Alex Tangy ◽  
Vijay Bhooshan Kumar ◽  
Indra Neel Pulidindi ◽  
Yael Kinel-Tahan ◽  
Yaron Yehoshua ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Heterogeneous Catalyst ◽  
Chlorella Vulgaris ◽  
Strontium Oxide ◽  
In Situ Transesterification ◽  
Carbon Dot

Effect of a chelating agent at different pH on the spectroscopic and structural properties of microwave derived hydroxyapatite nanoparticles: a bone mimetic material

2016 ◽  
Vol 40 (6) ◽  
pp. 5432-5441 ◽  
Author(s):  
Vijay Kumar Mishra ◽  
Birendra Nath Bhattacharjee ◽  
Devendra Kumar ◽  
Shyam Bahadur Rai ◽  
Om Parkash
Keyword(s):  
Microwave Irradiation ◽  
Structural Properties ◽  
Chelating Agent ◽  
Hydroxyapatite Nanoparticles

Asparagusroot-like and scattered needle-like formation of hydroxyapatite nanoparticles under microwave irradiation.

scholarly journals Effect of 2-[3-(trifluoromethyl)phenyl]-4H-furo[3,2-b]pyrrole-5-carboxhydrazides on photosynthetic processes

2022 ◽  
Vol 7 (1) ◽  
pp. 115-121
Author(s):  
Katarína Kráľová ◽  
Renata Gašparová ◽  
Martin Moncman
Keyword(s):  
Electron Transport ◽  
Microwave Irradiation ◽  
Chlorophyll Content ◽  
Chlorella Vulgaris ◽  
Room Temperature ◽  
Photosynthetic Electron Transport ◽  
Spinach Chloroplasts ◽  
Toluenesulfonic Acid ◽  
Heterocyclic Aldehydes

A new series of carboxhydrazides 6-8 was synthesized under microwave irradiation by reaction of carboxhydrazide 1 with heterocyclic aldehydes 2-4 in the presence of p-toluenesulfonic acid in ethanol. N-Benzoylcarboxhydrazide 9 was prepared by reaction of 1 with benzoylchlorid 5 in THF at room temperature. The effects of 6-9 on inhibition of photosynthetic electron transport in spinach chloroplasts and chlorophyll content in the antialgal suspensions of Chlorella vulgaris were investigated.

Feasible design for electricity generation from Chlorella vulgaris using convenient photosynthetic conditions

BIOCELL ◽  
2018 ◽  
Vol 42 (1) ◽  
pp. 7-11 ◽  
Author(s):  
M. Moustafa ◽  
T. Taha ◽  
M. Elnouby ◽  
M.A. Abu-Saied Aied ◽  
A. Shati ◽  
...  
Keyword(s):  
Chlorella Vulgaris ◽  
Electricity Generation
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