Effect of different solvents on subcritical solvent extraction of oil from Assam tea seeds (Camellia sinensis var. assamica): Optimization of oil extraction and physicochemical analysis

2018 ◽  
Vol 42 (2) ◽  
pp. e12960 ◽  
Author(s):  
Nontakarn Uoonlue ◽  
Rattana Muangrat
Keyword(s):  
Solvent Extraction ◽  
Camellia Sinensis ◽  
Oil Extraction ◽  
Physicochemical Analysis ◽  
Assam Tea

Optimization of aqueous enzymatic method for Camellia sinensis oil extraction and reuse of enzymes in the process

2019 ◽  
Vol 128 (6) ◽  
pp. 716-722 ◽  
Author(s):  
Li Peng ◽  
Qin Ye ◽  
Xiaoying Liu ◽  
Shulai Liu ◽  
Xianghe Meng
Keyword(s):  
Camellia Sinensis ◽  
Oil Extraction ◽  
Enzymatic Method

scholarly journals Volatile profiles and antioxidant activity of different cultivars of Camellia sinensis var. assamica grown in Thailand

Food Research ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 354-362
Author(s):  
S. Khruengsai ◽  
T. Sripacho ◽  
P. Pripdeevech
Keyword(s):  
Antioxidant Activity ◽  
Volatile Compounds ◽  
Camellia Sinensis ◽  
Antioxidant Activities ◽  
Epigallocatechin Gallate ◽  
Dry Weight ◽  
Epicatechin Gallate ◽  
Potential Health ◽  
Linalool Oxide ◽  
Assam Tea

Tea is considered as the most consumed drink in the world containing high antioxidant capacity. In this study, the volatile compounds, the phenolic content, catechins and caffeine including antioxidant activities of 22 Camellia sinensis var. assamica (Assam tea) cultivars were investigated. The volatile compounds were investigated by GC-MS. At least forty-five volatile compounds representing 94.99-99.65% of all cultivars were identified. Limonene, trans-linalool oxide, cis-linalool oxide, linalool, and furfural were detected as the major components among these cultivars. Varied ranges were found in all Assam tea cultivars for the contents of phenolics (113.45-245.55 mg gallic acid/g dry weight), total catechins (170.03-355.59 mg/g dry weight), caffeine (0.92-3.40 mg/g dry weight), and antioxidant activities (1418.68-2728.46 µmol Trolox/g dry weight and 1448.98-2864.17 µmol Trolox/g dry weight for DPPH and ABTS assay, respectively). The antioxidant activity was correlated with phenolic compounds such as epigallocatechin gallate, epicatechin gallate, and catechin gallate. The specific differences among Assam tea cultivars are dependent on the tea cultivar and altitude which may play a significant role in breeding Assam tea cultivars in Thailand for providing its potential health benefits.

scholarly journals A new aqueous method for recovering high quality oil and deoiled meal from pecan kernels

2021 ◽  
Author(s):  
Shuting Fu ◽  
Wenbiao Wu
Keyword(s):  
Waste Water ◽  
Solvent Extraction ◽  
Oil Recovery ◽  
Oil Content ◽  
Acid Value ◽  
Oil Extraction ◽  
High Quality ◽  
Assisted Extraction ◽  
Aqueous Method ◽  
Enzyme Assisted Extraction

The extraction of oil by a new aqueous method has been promoted because it is environmentally friendly, safe and economical of cost. A new aqueous method using 1.4:10.0 water-to-pecan kernel slurry ratio was developed, which recovered 97.73% of oils from the kernel containing 70.47% crude oil content. The method had a higher oil recovery as compared to enzyme-assisted extraction or solvent extraction or cold pressing in terms of producing oil for safe consumption. The method recovered oils with 0.47 mg KOH/g acid value and 0.34 mmol/kg peroxide value which were identical to that obtained by enzyme-assisted aqueous method and lower than that obtained by solvent extraction. The de-oiled pecan meal obtained by the new aqueous method only contained 5.14% residual oils, which was edible since no harmful chemical was added during oil extraction. No waste water was produced during the aqueous extraction of oils.

scholarly journals Extracción de aceite a partir de microalgas obtenidas de la laguna El Estanco, en San Andrés de sotavento - Colombia

2018 ◽  
Vol 3 (1) ◽  
pp. 11
Author(s):  
Karol Fuentes Escobar ◽  
Julián Olivera Bonilla ◽  
Adela Rodríguez Chaparro
Keyword(s):  
Solvent Extraction ◽  
Oil Extraction ◽  
San Andres ◽  
Chloroform Methanol

The objective of this research is to extract oil from the microalgae obtained in the lagoon El Estanco, located in San Andrés de Sotavento, Colombia, using the modified Bligh & Dyer method, with two types of solvents For chloroform + methanol and hexane. The results obtained with solvent extraction chloroform + methanol provided the largest volume of extracted oil, a comparison with hexane.Keywords: Oil, Extraction, Microalgae.

scholarly journals Pressure, temperature and processing time in enhancing Camelina sativa oil extraction by Instant Controlled Pressure-Drop (DIC) texturing pre-treatment

2020 ◽  
Vol 71 (3) ◽  
pp. 365
Author(s):  
K. Bouallegue ◽  
T. Allaf ◽  
R. Ben Younes ◽  
C. Téllez-Pérez ◽  
C. Besombes ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Pressure Drop ◽  
Processing Time ◽  
Seed Oil ◽  
Oil Extraction ◽  
Camelina Sativa ◽  
Oil Yield ◽  
Camelina Oil ◽  
Pre Treatment ◽  
Instant Controlled Pressure Drop

Instant Controlled Pressure Drop (DIC) was evaluated as a texturing pre-treatment for the extraction of Camelina sativa (L.) oil. DIC was coupled to Accelerated Solvent Extraction (ASE), Pressing and Dynamic Maceration (DM). DIC optimization was performed by studying the effects of pressure, temperature and processing time on oil yield. DIC + ASE obtained seed-oil yields of 615.9±0.5 against 555.5±0.5 g oil/kg-ddb for untextured seeds (RM). Via pressing, oil yields were 490.9±0.5 and 444.7±0.5 g oil/kg-ddb for textured and untextured seeds, respectively. Through coupling DIC (P: 0.63 MPa and t: 105 s) to the pressing extraction (60 s) of seeds along with 2h of DM of meals, it was possible to reach 605.8 g oil/kg ddb of oil yield. The same results were not obtained for RM seeds, where after 24 h of DM extraction, the oil yield was 554.7 g oil/kg ddb. DIC allowed for an increase in Camelina oil yields, reduced extraction time and valorized pressing meals.

Determination of Organic Chloride Content in the Specialty Oilfield Chemicals Used in the Crude Oil Extraction, Transportation and Refining by X-ray Fluorescence Spectrometry

2021 ◽  
pp. 6-11
Author(s):  
A. V. Grigoriev ◽  
◽  
O.V. Levanova ◽  
M. S. Tyumentsev ◽  
A.V. Frolova ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Crude Oil ◽  
Chloride Content ◽  
Oil Extraction ◽  
Fluorescence Spectrometry ◽  
Preparation Procedure ◽  
Specimen Preparation ◽  
X Ray ◽  
Oilfield Chemicals ◽  
Organic Chloride

The organic chloride content in crude oil being among the most crucial quality characteristics of the crude is strictly controlled. The presence of organic chlorides in crude oil greatly endangers the oil refineries since it causes a severe equipment corrosion. Specialty oilfield chemicals, which are widely used in the crude oil extraction, transportation, refining and storage, could be a source of the crude oil contamination with organic chlorides. As a consequence, the organic chloride content determination in the chemicals is required. It was demonstrated that the organic chloride content in the specialty oilfield chemicals can be determined by X-ray fluorescence spectrometry (XRF) using an appropriate specimen preparation procedure. Two specimen preparation procedures, i.e. the solvent extraction and the distillation of a specimen mixed with the crude oil or its model, were tested. It was established that an organic chloride content can be successfully determined in a broad range of the specialty oilfield chemicals by the XRF technique when applying these specimen preparation procedures. The investigation of four types of the specialty oilfield chemicals confirmed that the specimen preparation procedure, involving a solvent extraction of organic chlorides from the chemicals into isooctane, is more comprehensive than the distillation procedure since it is free from the limitations associated with the use of high temperatures.

scholarly journals Partial rpoB Gene Sequencing Identification and Probiotic Potential of Floricoccus penangensis ML061-4 Isolated from Assam Tea (Camellia sinensis var. assamica)

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Patthanasak Rungsirivanich ◽  
Angkhana Inta ◽  
Yingmanee Tragoolpua ◽  
Narumol Thongwai
Keyword(s):  
Camellia Sinensis ◽  
Competitive Inhibition ◽  
Lactic Acid Production ◽  
Cell Surface Hydrophobicity ◽  
Surface Hydrophobicity ◽  
Raw Material ◽  
Bacterial Isolates ◽  
Northern Thailand ◽  
E Coli ◽  
Assam Tea

Abstract Assam tea or Miang is a local name of Camellia sinensis var. assamica in northern Thailand. By the local wisdom, Assam tea leaves are used as the raw material in tea fermentation to produce “Fermented Miang” consumed by people in northern Thailand and the countries nearby. In this study, twenty-eight bacterial isolates were obtained from Assam tea leaf samples collected from Nan province, Thailand. Bacterial isolates were identified within 6 genera including Bacillus, Floricoccus, Kocuria, Lysinibacillus, Micrococcus and Staphylococcus. Among these, the strain ML061-4 shared 100.0 and 99.4% similarity of 16S rRNA and rpoB gene sequence with F. penangensis JCM 31735T, respectively. This is the first discovery of F. penangensis in Thailand. F. penangensis ML061-4 exhibited probiotic characteristics including lactic acid production (9.19 ± 0.10 mg/ml), antibacterial activities (Escherichia coli ATCC 25922 and E. coli O157:H7 DMST 12743), acid and bile salt tolerance (71.1 and 54.9%, respectively), autoaggregation (97.0%), coaggregation (66.0% with E. coli O157:H7), cell surface hydrophobicity (90.0%), bacterial adhesion (82.9% with Lactobacillus plantarum FM03-1), competitive inhibition (17.8% with E. coli O157:H7) and competitive exclusion (34.9% with E. coli O157:H7). Overall, the data suggested that F. penangensis ML061-4 had a great potential to be a probiotic.

scholarly journals Culturable Bacterial Community on Leaves of Assam Tea (Camellia sinensis var. assamica) in Thailand and Human Probiotic Potential of Isolated Bacillus spp.

2020 ◽  
Vol 8 (10) ◽  
pp. 1585 ◽  
Author(s):  
Patthanasak Rungsirivanich ◽  
Witsanu Supandee ◽  
Wirapong Futui ◽  
Vipanee Chumsai-Na-Ayudhya ◽  
Chaowarin Yodsombat ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Camellia Sinensis ◽  
Antibacterial Properties ◽  
Cell Surface Hydrophobicity ◽  
Vero Cells ◽  
Surface Hydrophobicity ◽  
Inhibitory Effect ◽  
Northern Thailand ◽  
Bacillus Spp ◽  
Assam Tea

Assam tea plants (Camellia sinensis var. assamica) or Miang are found in plantations and forests of Northern Thailand. Leaf fermentation has been performed for centuries, but little information is available about their associated microbial community. One hundred and fifty-seven bacterial isolates were isolated from 62 Assam tea leaf samples collected from 6 provinces of Northern Thailand and classified within the phyla of Firmicutes, Actinobacteria, and Proteobacteria. Phayao and Phrae provinces exhibited the highest and the lowest bacterial diversities, respectively. The bacterial community structural pattern demonstrated significant differences between the west and the east sides. Since some Bacillus spp. have been reported to be involved in fermented Miang, Bacillus spp. isolated in this study were chosen for further elucidation. Bacillus siamensis ML122-2 exhibited a growth inhibitory effect against Staphylococcus aureus ATCC 25923 and MRSA DMST 20625, and the highest survival ability in simulated gastric and intestinal fluids (32.3 and 99.7%, respectively), autoaggregation (93.2%), cell surface hydrophobicity (50.0%), and bacterial adherence with Vero cells (75.8% of the control Lactiplantibacillusplantarum FM03-1). This B. siamensis ML122-2 is a promising probiotic to be used in the food industry and seems to have potential antibacterial properties relevant for the treatment of antibiotic-resistant infections.

Assessment of Bio-oil Extraction from Tetraselmis chui Microalgae Comparing Supercritical CO2, Solvent Extraction, and Thermal Processing

2011 ◽  
Vol 26 (1) ◽  
pp. 248-255 ◽  
Author(s):  
Scott Grierson ◽  
Vladimir Strezov ◽  
Sargent Bray ◽  
Raffaella Mummacari ◽  
Luu Thai Danh ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Thermal Processing ◽  
Supercritical Co2 ◽  
Oil Extraction ◽  
Bio Oil ◽  
Tetraselmis Chui
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