http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
A comprehensive study on enhancement of lipid yield from Tetradesmus obliquus MT188616.1
Arekal Nagaraja Roopashri,Roshan Makam 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.1
Microalgae are known to produce neutral-lipids such as triacylglycerols (TAGs), a raw material required for biofuel production. The present study aimed to screen the high lipid producing native microalgae strains from freshwater habitats, select appropriate methods to extract lipid from wet algal biomass, and study fatty acid compositions. At first, isolated twenty native strains among them two isolates that exhibited higher lipid content was further subjected to molecular characterization. Results based on the cell morphology, molecular characterization, and phylogenetic analysis indicated that these two strains were Tetradesmus obliquus and Ettlia oleoabundans. Based on the growth study of screened algal strains, the biomass ranged from 0.65 g/L to 6.03 g/L with Tetradesmus obliquus providing the highest biomass and total lipid content of 51% when cultured in a nitrogen-deprived medium. The highest lipid yield was obtained with hexane:isopropanol (2 : 1) solvent mixtures, accompanied by an optimized cell wall disruption method. Additionally, it was found that Tetradesmus obliquus had higher contents of saturated and monounsaturated fatty acids, i.e., 36.19% and 31.49%, respectively, in nitrogen-deprived medium (N), whereas in nitrogen-containing medium (N+) was 27.34% and 28.85%, respectively. Hence, this suggests their suitability for biofuel production.
Graphene for Controlled and Accelerated Osteogenic Differentiation of Human Mesenchymal Stem Cells
Nayak, Tapas R.,Andersen, Henrik,Makam, Venkata S.,Khaw, Clement,Bae, Sukang,Xu, Xiangfan,Ee, Pui-Lai R.,Ahn, Jong-Hyun,Hong, Byung Hee,Pastorin, Giorgia,Ö,zyilmaz, Barbaros American Chemical Society 2011 ACS NANO Vol.5 No.6
<P>Current tissue engineering approaches combine different scaffold materials with living cells to provide biological substitutes that can repair and eventually improve tissue functions. Both natural and synthetic materials have been fabricated for transplantation of stem cells and their specific differentiation into muscles, bones, and cartilages. One of the key objectives for bone regeneration therapy to be successful is to direct stem cells’ proliferation and to accelerate their differentiation in a controlled manner through the use of growth factors and osteogenic inducers. Here we show that graphene provides a promising biocompatible scaffold that does not hamper the proliferation of human mesenchymal stem cells (hMSCs) and accelerates their specific differentiation into bone cells. The differentiation rate is comparable to the one achieved with common growth factors, demonstrating graphene’s potential for stem cell research.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2011/ancac3.2011.5.issue-6/nn200500h/production/images/medium/nn-2011-00500h_0004.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn200500h'>ACS Electronic Supporting Info</A></P>
Sarabjit kaur,Fon Sim Ong,Sathyaprakash Balaji Makam 글로벌지식마케팅경영학회 2020 Global Marketing Conference Vol.2020 No.11
Service failure of high severity can lead to high recovery satisfaction when recovery efforts are seen very fair. Customers satisfied with recovery efforts and displaying high attachment anxiety will continue to repurchase. Attachment avoidance did not have an impact on the behavioural intentions and neither did the brand authenticity perception.
Somen K. Bhudolia,Sunil C. Joshi,Anthony Bert,Goram R. Gohel,Makam Raama 한국섬유공학회 2019 Fibers and polymers Vol.20 No.8
Carbon composites are deemed suitable for components with complex geometries which require high impactresistance. The broad range of industrial applications requires composite structures to be lighter and not to compromise withtheir mechanical performance. Non-crimp fabrics with lower fibre areal weight (FAW) are the class of reinforcement materialwhich will only bring the advantages of better mechanical properties but will also offer more longevity to the structures andreduced maintenance costs. This research aims at investigating the low-velocity impact performance of textile spread towthin ply (100 gsm) composites with an aim to study the load bearing capability, deflection characteristics and energycharacteristics. The results are compared with the baseline thick (200 gsm) fibre reinforced composites. There was 19.2 %,16.6 %, and 6.57 % higher peak load for spread tow thin ply composites when compared to thick ply composites at 25 J, 42 J,and 52 J impact energies respectively. Significantly lower residual deflection (40 % to 76 %) and higher major damageenergy (20 % to 33 %) were observed for spread tow thin ply laminates compared to the thick ply variant at different impactenergies. At 42 J and 52 J impact energies, the damage index (DI) was 2 times and 4 times higher for Thick ply laminateshighlighting extensive damage, which is also observed with detailed failure mechanisms study.