http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Enhancement of microalgae growth and fatty acid content under the influence of phytohormones
Salama, E.S.,Kabra, A.N.,Ji, M.K.,Kim, J.R.,Min, B.,Jeon, B.H. Elsevier Applied Science 2014 Bioresource technology Vol.172 No.-
The growth of Scenedesmus obliquus improved with increase in phytohormones concentrations (10<SUP>-8</SUP>-10<SUP>-5</SUP>M). Indole-3-acetic acid (IAA) supported the maximum growth at 10<SUP>-5</SUP>M with 17.7x10<SUP>6</SUP>cells/mL and total fatty acid of 97.9mg/g-DCW, enhancing the growth by 1.9-fold compared to control (9.5x10<SUP>6</SUP>cells/mL). While 10<SUP>-5</SUP>M of a newly discovered phytohormone Diethyl aminoethyl hexanoate (DAH) demonstrated a 2.5-fold higher growth with 23.5x10<SUP>6</SUP>cells/mL and a total fatty acid content of 100mg/g-DCW. Poly-unsaturated fatty acid content increased up to 56% and 59% at 10<SUP>-5</SUP>M of IAA and DAH, respectively. The highest carbohydrate content (33% and 34%) achieved at 10<SUP>-8</SUP>M and 10<SUP>-5</SUP>M of IAA and DAH, respectively. While, the highest protein content (34% and 35%) obtained at 10<SUP>-8</SUP>M of IAA and DAH, respectively. The current investigation demonstrates that phytohormones accelerate microalgal growth and induce the quality and quantity of fatty acid content for biodiesel production.
Ahmed Atia,Yasser K. Abdel-Monem,A.H. Salama,Salah M. El-kousy,Wael H. Eisa 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.117 No.-
A clean and high-throughput synthesis of gold@chitosan nanocomposite using nontoxic oxalic acid as areducing agent was developed. The synthetic route was carried out in completely dry conditions, i.e. solid-state reaction. The gold nanoparticles were bound with chitosan through the hydroxyl and aminogroups, as confirmed by Fourier transform infrared spectroscopic analysis. Scanning and transmissionelectron microscopy imaging confirmed the formation of semi-spherical gold particles with an averagesize of 8–15 nm. The catalytic performance of the synthesized gold nanoparticles for the reduction ofchromium(IV) in the presence of formic acid was evaluated. The film-forming ability of chitosan enabledthe design of separable/reusable heterogeneous catalyst which is convenient for real industrial applications. The proposed solid-state synthetic route could be adapted to produce a wide variety of nanostructuredmaterials that are characterized by high-yield, greenness, and low cost in very simple steps.
Shahira M. Ezzat,Maha M. Salama,Aliaa N. ElMeshad,Mahmoud H. Teaima,Laila A. Rashad 대한약학회 2016 Archives of Pharmacal Research Vol.39 No.7
The anti-wrinkle activity of defatted rosemaryextract (DER) was assessed, and its effect was optimized byencapsulation in transferosomes (TFs). DER was standardizedto a rosmarinic acid content of 4.58 ± 0.023 mg%using reversed-phase high performance liquid chromatography(Rp-HPLC), and its components were identified byHPLC-diode array detection-tandem mass spectrometry. In vitro free radical scavenging assays showed DER hadhigh free radical scavenging activity against 2,2-diphenyl-2-picryl hydrazyl, 2,20-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid), and superoxide radicals. DER also inhibitedbleaching of b-carotene with high Fe(III) and Fe(II)chelating ability. In vivo anti-wrinkle activities of topicallyapplied DER (20, 50, and 100 mg) and a TF formulation(TF4, 20 mg of DER) were evaluated in UVB-irradiatedmice using a wrinkle scoring method, metalloproteinase(MMP) expression, and histopathology. Among thenanovesicles, TF4 was the most deformable, and had anacceptable size and encapsulation efficiency and enhancedpermeation of DER through rat skin compared with unencapsulatedDER. DER (50 and 100 mg) and TF4 significantlyinhibited MMP-2 and MMP-9 expression andimproved wrinkle scores. DER and TF4 moderatelydecreased epidermal thickness without pigmentation. DERis a potent natural antioxidant for combating skin aging. Moreover, encapsulation of DER in TFs will enhance itsskin permeation and anti-wrinkle activity.
El-Dalatony, M.M.,Kurade, M.B.,Abou-Shanab, R.A.I.,Kim, H.,Salama, E.S.,Jeon, B.H. Elsevier Applied Science 2016 Bioresource Technology Vol.219 No.-
Separate hydrolysis fermentation (SHF) and simultaneous saccharification fermentation (SSF) processes were studied for bioethanol production from microalgal biomass. SSF was selected as an efficient process to enhance the bioethanol yield through repeated-batches using immobilized yeast cells. Combined sonication and enzymatic hydrolysis of Chlamydomonas mexicana generated 10.5 and 8.48g/L of ethanol in SSF and SHF, respectively. Yeast utilized maximum portion of total reducing sugar (TRS) reaching a consumption efficiency of 91-98%. A bioethanol yield of 0.5g/g (88.2% of theoretical yield) and volumetric productivity of 0.22g/L/h was obtained after 48h of SSF. Immobilized yeast cells enabled repetitive production of ethanol for 7 cycles displaying a fermentation efficiency up to 79% for five consecutive cycles. The maximum ethanol production was 9.7g/L in 2nd-4th cycles. A total energy recovery of 85.81% was achieved from microalgal biomass in the form of bioethanol. Repeated-batch SSF demonstrated the possibility of cost-effective bioethanol production.
Ibrahim, Mona H,Rashed, Reham A,Hassan, Naglaa M,Al-azhary, Nevin M,Salama, Asmaa I,Mostafa, Marwa N Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.6
It is thought that population characteristics of breast cancer may be due to a variation in the frequency of different alleles of genes such as CYP1B1. We aimed to determine the association of CYP1B1 polymorphisms in 200 breast cancer cases and 40 controls by PCR-RFLP. Frequencies were assessed with clinical and risk factors in Egyptian patients. The genotype LV and the Leu allele frequencies for patients and controls were 42.9% and 50%, and 52.9% and 53.3%, respectively), with no significant differences observed (P values = 0.8 and 0.6, respectively). There was also no significant association between genotypes and any risk factors for cases (P>0.05) except laterality and metastasis of the tumor (P values=0.006 and 0.06, respectively). The CYP1B1 polymorphism Val432Leu was not associated with breast cancer in Egypt, but may provide clues for future studies into early detection of the disease.