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Marine Structures: Future Trends and the Role of Universities Perspective

Preben Terndrup Pedersen

Engineering 2015, Volume 1, Issue 1,   Pages 131-138 doi: 10.15302/J-ENG-2015004

Abstract: The last section of the paper contains thoughts on the role of universities in education, research, andIt discusses curriculum requirements for maritime-technology education, basic research activities, and

Keywords： marine structures     ships     offshore structures     curriculum     research activities    

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Estrogenic activities of di-2-ethylhexyl phthalate

JIN Qiumei, LI Yan, SUN Zengrong

Frontiers of Medicine 2008, Volume 2, Issue 3,   Pages 303-308 doi: 10.1007/s11684-008-0058-2

Abstract: Estrogenic activities of DEHP were studied by assays of human breast cancer MCF-7 cell proliferation
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Synthesis, insecticidal activities and DFT study of pyrimidin-4-amine derivatives containing the 1,2,4

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 7,   Pages 1090-1100 doi: 10.1007/s11705-021-2091-5

Abstract: Twenty six novel pyrimidin-4-amine derivatives containing the 1,2,4-oxadiazole motif were synthesized. Their chemical structures were confirmed by 1H nuclear magnetic resonance (NMR), 13C NMR, and high-resolution mass spectrography. The insecticidal activity results indicated that some of them possessed excellent insecticidal activity (100%) against Mythimna separate, especially for compounds 6d, 6f, 6o, 6w, 6y and 6z. These compounds exhibited no activity against the insects Aphis medicagini and Tetranychus cinnabarinus. The structure- insecticidal activity relationships are discussed. Density functional theory analysis can potentially be used to design more active compounds. These results provide useful insecticide design information for further optimization.

Keywords： synthesis     pyrimidin-4-amine derivatives     1     2     4-oxadiazole     insecticidal activity     structure-activity relationship    

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Achievements and development ofChina’s space activities

Wang Liheng

Strategic Study of CAE 2008, Volume 10, Issue 12,   Pages 10-12

Abstract: style="text-align: justify;">This paper describes the current situation of the international space activitiesworld and their characteristics, briefly introduces the brilliant achievements of China's space activities, and gives a full prospect for the future development of China's space activities.

Keywords： China’s space activities     new space programs     achievements of China’s space activities    

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A comparison of the biological activities of ethyl acetate fractions from the stems and leaves of

Zhaolei WANG, Kai JIANG, Qinchao DING, Shujun LIU, Xiaobing DOU, Bin DING

Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 4,   Pages 505-512 doi: 10.15302/J-FASE-2019271

Abstract:

Pursh (PCP) is a popular traditional medicinal plant in China, widely used for the treatment of a variety of liver diseases. Although it has been long recognized that the main active elements of PCP are contained in ethyl acetate fraction (EAF), little is known so far in terms of the relative effectiveness of EAF derived from the stems versus leaves of this plant. In the current study, we prepared EAF by reflux extraction and sequential extraction from the stems (SEAF) and leaves (LEAF) of PCP and tested their hepatoprotective efficacies. The extract rates and flavonoid contents of LEAF were higher than those of SEAF. EAFs (>50 μg·mL ) prevented lipid accumulation in cells and protected against lipotoxicity injury when the concentration exceeded 25 μg·mL . More than 95% free radicals released by 2,2-diphenyl-1-picrylhydrazyl (DPPH) were eliminated by 25 μg·mL SEAF and 50 μg·mL LEAF, respectively. Further, EAFs (25 μg·mL ) also showed protective antioxidant effects, with the activity of LEAF being significantly higher than that of SEAF. EAFs (10 mg·mL ) also showed similar unspecific bacteriostatic activity. In comparison with SEAF, LEAF contained more flavonoids and had a higher anti-oxidation capability and for these reasons we suggest it should be better for clinical use.

Keywords： antibacterial     anti-oxidation     lipid accumulation     lipotoxicity     Penthorum chinense Pursh    

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On the New Thought Concerning Water-related Human Activities

Li Peicheng

Strategic Study of CAE 2000, Volume 2, Issue 2,   Pages 5-9

Abstract: experience and looking for the future, the author advances some new thought on water-related human activitiesin the 21st century, the relationships among human activities, water-body dynamic states, ecologicaland other productive activities upon water-body dynamics as well as the inverse actions.Research, exploration and utilization of waters in atmosphere and sea should be intensified.In the future water-related human activities, the human beings should adapt to and take advantage of

Keywords： water-related activities     water-saving     water protection     new thought    

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Development Strategy and Key Areas of China5 s Space Activities

Sun Laiyan

Strategic Study of CAE 2006, Volume 8, Issue 10,   Pages 6-12

Abstract: experiences and problems, and, against the backdrop of the developing trend of international space activities

Keywords： China's space activities     development strategy     key areas    

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Soil enzyme activities and their indication for fertility of urban forest soil

SHAN Qihua, YU Yuanchun, ZHANG Jinchi, YU Jian

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 2,   Pages 218-223 doi: 10.1007/s11783-008-0037-5

Abstract: soil enzyme on soil fertility as well as the correlation between physicochemical properties and enzyme activitiesBasic soil physicochemical properties and enzyme activities were analyzed in the laboratory.total nitrogen (N) had great effects on hydrogen peroxidase, dehydrogenase, and alkaline phosphatase activitiesHowever, pH only had great effect on hydrogen peroxidase, dehydrogenase, and alkaline phosphatase activitiesThe more soil enzyme activities there were, the higher the fertility of urban forest soil.
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Beneficial metabolic activities of inflammatory cytokine interleukin 15 in obesity and type 2 diabetes

Jianping Ye

Frontiers of Medicine 2015, Volume 9, Issue 2,   Pages 139-145 doi: 10.1007/s11684-015-0377-z

Abstract:

In obesity, chronic inflammation is believed to induce insulin resistance and impairs adipose tissue function. Although this view is supported by a large body of literature, it has been challenged by growing evidence that pro-inflammatory cytokines may favor insulin sensitivity through induction of energy expenditure. In this review article, interleukin 15 (IL-15) is used as a new example to explain the beneficial effects of the pro-inflammatory cytokines. IL-15 is secreted by multiple types of cells including macrophages, neutrophils and skeletal muscle cells. IL-15 expression is induced in immune cells by endotoxin and in muscle cells by physical exercise. Its transcription is induced by transcription factor NF-κB. IL-15 binds to its receptor that contains three different subunits (α, β and γ) to activate JAK/STAT, PI3K/Akt, IKK/NF-κB and JNK/AP1 pathways in cells. In the regulation of metabolism, IL-15 reduces weight gain without inhibiting food intake in rodents. IL-15 suppresses lipogenesis, stimulates brown fat function, improves insulin sensitivity through weight loss and energy expenditure. In human, circulating IL-15 is negatively associated with body weight. In the immune system, IL-15 stimulates proliferation and differentiation of T cells, NK cells, monocytes and neutrophils. In the anti-obesity effects of IL-15, T cells and NK cells are not required, but leptin receptor is required. In summary, evidence from human and rodents supports that the pro-inflammatory cytokine IL-15 may enhance energy expenditure to protect the body from obesity and type 2 diabetes. The mechanism of IL-15 action remains to be fully uncovered in the regulation of energy expenditure.

Keywords： inflammation     obesity     cytokine     energy expenditure     insulin resistance    

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Antioxidant and antitumor effects and immunomodulatory activities of crude and purified polyphenol extract

Xiaohong Kou,Lihua Han,Xingyuan Li,Zhaohui Xue,Fengjuan Zhou

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 1,   Pages 108-119 doi: 10.1007/s11705-016-1553-7

Abstract: The antioxidant and antitumor effects as well as the immunomodulatory activities of crude and purifiedassays demonstrated that blueberry purified polyphenol extract (BBPP) exhibited higher antioxidant activitiesThese results indicate that BBCP has significant antioxidant and antitumor activities and that it can

Keywords： crude polyphenol extract     purified polyphenol extract     blueberry     antioxidant     antitumor     immunity    

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and mechanism insight on SiC quantum dots sensitized inverse opal TiO with superior photocatalytic activities

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1913-1924 doi: 10.1007/s11705-023-2350-8

Abstract: The combination of SiC quantum dots sensitized inverse opal TiO2 photocatalyst is designed in this work and then applied in wastewater purification under simulated sunlight. From various spectroscopic techniques, it is found that electrons transfer directionally from SiC quantum dots to inverse opal TiO2, and the energy difference between their conduction/valence bands can reduce the recombination rate of photogenerated carriers and provide a pathway with low interfacial resistance for charge transfer inside the composite. As a result, a typical type-II mechanism is proved to dominate the photoinduced charge transfer process. Meanwhile, the composite achieves excellent photocatalytic performances (the highest apparent kinetic constant of 0.037 min–1), which is 6.2 times (0.006 min–1) and 2.1 times (0.018 min–1) of the bare inverse opal TiO2 and commercial P25 photocatalysts. Therefore, the stability and non-toxicity of SiC quantum dots sensitized inverse opal TiO2 composite enables it with great potential in practical photocatalytic applications.

Keywords： inverse opal TiO2     silicon carbide quantum dots     quantum dot sensitized photocatalyst     type-II charge transfer route    

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Effects of hydraulic retention time on nitrification activities and population dynamics of a conventional

Hongyan LI, Yu ZHANG, Min YANG, Yoichi KAMAGATA

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 1,   Pages 43-48 doi: 10.1007/s11783-012-0397-8

Abstract: The effects of hydraulic retention time (HRT) on the nitrification activities and population dynamics

Keywords： ammonia-oxidizing bacteria     hydraulic retention time     nitrification activity     nitrite-oxidizing bacteria     population dynamics    

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Catalytic activities and mechanism of formaldehyde oxidation over gold supported on MnO

Guanglong PANG,Donghui WANG,Yunhong ZHANG,Chunyan MA,Zhengping HAO

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 3,   Pages 447-457 doi: 10.1007/s11783-015-0808-8

Abstract: We investigated the properties and catalytic activities of formaldehyde oxidation at room temperatureCrystalline structures of MnO are the main factor affecting the catalytic activities of these samples

Keywords： MnO2 microspheres     Au/MnO2     formaldehyde oxidation     γ-MnO2    

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International Winter Wheat Improvement Program: history, activities, impact and future

Alexey MORGOUNOV, Fatih OZDEMIR, Mesut KESER, Beyhan AKIN, Thomas PAYNE, Hans-Joachim BRAUN

Frontiers of Agricultural Science and Engineering 2019, Volume 6, Issue 3,   Pages 240-250 doi: 10.15302/J-FASE-2019261

Abstract:

International Winter Wheat Improvement Program (IWWIP) was established in 1986 between the Government of Turkey and CIMMYT with three main objectives: (1) develop winter/facultative germplasm for Central and West Asia, (2) facilitate global winter wheat germplasm exchange, and (3) training wheat scientists. ICARDA joined the program in 1991 making it a three-way partnership that continues to work effectively. The germplasm developed by IWWIP as well as the winter wheat cultivars and lines received from global cooperators are assembled into international nurseries. These nurseries are offered annually to public and private entities (IWWIP website) and distributed to more than 100 cooperators in all continents. IWWIP impact has primarily been in new winter wheat cultivars combining broad adaptation, high yield potential, drought tolerance and disease resistance. A total of 93 IWWIP cultivars have been released in 11 countries occupying annually an estimated 2.5–3.0 Mha. IWWIP cooperation with researchers in Turkey, Central and West Asia and several US universities has resulted in a number of publications reviewed in this paper. Important IWWIP impacts include national inventories of wheat landraces in Turkey, Tajikistan and Uzbekistan, their collection, characterization, evaluation and utilization.

Keywords： biotic and abiotic stresses     breeding     methodology     winter wheat    

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A Milestone in China´s Aerospace History—White Paper on China´s Space Activities

Guo Baozhu

Strategic Study of CAE 2006, Volume 8, Issue 10,   Pages 1-5

Abstract: Office of the State Council published November 21 a white paper, titled “China´s Space Activitiesprinciples, present situation, future development and international cooperation concerning China，s space activitiesmeaning of some important ideas and viewpoints in the white paper, including the concept of China space activities

Keywords： white paper on China's space activities     concept of ‘ broad space activities’     aerospace policy     future    

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Title Author Date Type Operation

Marine Structures: Future Trends and the Role of Universities

Preben Terndrup Pedersen

Journal Article

Estrogenic activities of di-2-ethylhexyl phthalate

JIN Qiumei, LI Yan, SUN Zengrong

Journal Article

Synthesis, insecticidal activities and DFT study of pyrimidin-4-amine derivatives containing the 1,2,4

Journal Article

Achievements and development ofChina’s space activities

Wang Liheng

Journal Article

A comparison of the biological activities of ethyl acetate fractions from the stems and leaves of

Zhaolei WANG, Kai JIANG, Qinchao DING, Shujun LIU, Xiaobing DOU, Bin DING

Journal Article

On the New Thought Concerning Water-related Human Activities

Li Peicheng

Journal Article

Development Strategy and Key Areas of China5 s Space Activities

Sun Laiyan

Journal Article

Soil enzyme activities and their indication for fertility of urban forest soil

SHAN Qihua, YU Yuanchun, ZHANG Jinchi, YU Jian

Journal Article

Beneficial metabolic activities of inflammatory cytokine interleukin 15 in obesity and type 2 diabetes

Jianping Ye

Journal Article

Antioxidant and antitumor effects and immunomodulatory activities of crude and purified polyphenol extract

Xiaohong Kou,Lihua Han,Xingyuan Li,Zhaohui Xue,Fengjuan Zhou

Journal Article

and mechanism insight on SiC quantum dots sensitized inverse opal TiO with superior photocatalytic activities

Journal Article

Effects of hydraulic retention time on nitrification activities and population dynamics of a conventional

Hongyan LI, Yu ZHANG, Min YANG, Yoichi KAMAGATA

Journal Article

Catalytic activities and mechanism of formaldehyde oxidation over gold supported on MnO

Guanglong PANG,Donghui WANG,Yunhong ZHANG,Chunyan MA,Zhengping HAO

Journal Article

International Winter Wheat Improvement Program: history, activities, impact and future

Alexey MORGOUNOV, Fatih OZDEMIR, Mesut KESER, Beyhan AKIN, Thomas PAYNE, Hans-Joachim BRAUN

Journal Article

A Milestone in China´s Aerospace History—White Paper on China´s Space Activities

Guo Baozhu

Journal Article