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Li Jianyu,Zhao Xin,Bailey Laura S.,Kamat Manasi N.,Basso Kari B. 한국응용생명화학회 2021 Applied Biological Chemistry (Appl Biol Chem) Vol.64 No.5
The biochemical composition of organic fertilizers largely determines their nutrient supply characteristics following soil application as well as their potential impact on soil microbial communities. Yet, limited information is available regarding the biochemical composition of organic fertilizers derived from different nutrient sources. Here, we qualitatively analyzed the presence and abundance of proteins, lipids, and metabolites in a liquid fish fertilizer (LFF) product and a type of granular organic fertilizer (GOF) commonly used in organic vegetable production, using liquid chromatography–tandem mass spectrometry (LC–MS/MS). Our results suggest that the presence and abundance of proteins, lipids, and metabolites differ greatly between GOF and LFF. The qualitative analysis shows LFF as a rich source of metabolites, while complex proteins and long-chain saturated fatty acids are dominant in GOF. The degree of biochemical composition complexity may help explain the varying impacts of different types of organic fertilizers on nutrient availability, soil health, and environmental quality.
Enhancement and Mechanism of Transdermal Absorption of Terpene-Induced Propranolol Hydrochloride
Ying Cui,Lingzhi Li,Li Zhang,Jianyu Li,Jun Gu,Haiying Gong,Peng Guo,Wei Tong 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.9
For the purpose of efficient and safe transdermal administration of propranolol hydrochloride (PHCl), effects of (+)-borneol, (+)-camphor, and α-bisabolol (5 w/v%) in 66.6% ethanol solution on transdermal permeation across rat skin in vitro and their enhancement mechanism was investigated with fourier transform infrared spectroscopy, differential scanning calorimetry, and PHCl-stratum corneum binding studies. Each of (+)-borneol, (+)-camphor, and α-bisabolol significantly increased the transdermal flux of PHCl through rat skin in comparison to the control. The enhancement mechanism of the terpenes is involved with disruption of the lipid bilayer and increase of PHCl partitioning coefficient to the stratum corneum. As for α-bisabolol, the protect effect of skin from dehydration and an important reason of irritation incident were observed with differential scanning calorimetry for the first time.
A Model Predictive Current Control Based on Adaline Neural Network for PMSM
Li Hongfeng,Liu Zhengyu,Shao Jianyu 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.2
The parameter mismatch seriously affects the control performance of the model predictive current control (MPCC). Aiming at improving the parameter robustness of MPCC, a MPCC method based on Adaline neural network for permanent magnet synchronous motor (PMSM) is established. First, the parameters sensitivity analysis of PMSM incremental current prediction model is carried out that eliminates effects of rotor flux linkage mismatch and resistance mismatch. Therefore, a new incremental current prediction model is built, which does not require rotor flux and resistance parameters. Second, based on the above model, Adaline neural network strategy is introduced to identify the inductance parameters which has a variable momentum to improve accuracy. Then, the strategy proposed in this paper has strong robustness to parameter mismatch. Finally, experiment results verify that the proposed method can effectively improve the parameter robustness.
A Single-Stage High-Frequency-Link Microinverter with Split-Phase Structure
Xuewen Li,Jia Liu,Guozhong Zhu,Fangchao Ji,Jianyue Di,Yue Wang,Jinjun Liu 전력전자학회 2023 ICPE(ISPE)논문집 Vol.2023 No.-
High-frequency link (HFL) inverters have drawn a lot of attention as a promising structure, owing to their high transformer utilization factor, bidirectional energy transfer, and easy implementation of soft switching. However, the use of HFI structures in split-phase systems is rarely studied. Therefore, a novel single-stage high-frequency link microinverter with a split-phase structure is proposed in this paper. The proposed microinverter can provide two different output-voltage levels matching the single-phase three-wire power system. The output voltages of the two phases can be balanced naturally without dedicated control. It has grid-forming capability, which can be used in both grid-connected applications and islanded applications. With a secondary-side modulation (SSM) strategy, zero-voltage switching (ZVS) can be realized in the proposed microinverter. A 600-W prototype is established, and the experimental and simulation results verify the proposed microinverter.
Influence of Dynamic Loading Activation Time on Electro-osmotic Consolidation of Soft Soil
Xiaobing Li,Jianyu Shu,Jun Wang,Hongtao Fu,Peng Wang,Xiuqing Hu 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.11
Electro-osmosis is a suitable method for the consolidation of soft soil. However, the significant potential loss caused by the cracking of the soil near the electrode in the later stages of electro-osmosis hinders further improvement of its efficiency. Dynamic loading is applied to overcome this problem. The dynamic loading activation time is considered to strongly influence the performance of the combined electro-osmosis-dynamic loading process. In this paper, the maximum current ratio (MCR) is proposed as an index of the dynamic loading activation time. Laboratory tests were performed with different dynamic loading activation times to confirm the influence of the dynamic loading time on electro-osmosis consolidation. During the combined processes of dynamic loading and electro-osmosis, the current, electric potential, discharged water, and surface settlement were monitored. In the following testing, the water content and undrained shear strength were measured. Compared with the electro-osmosis method alone, electro-osmosis and dynamic loading was found to yield superior performance improvement. The method described in this paper to determine the optimal dynamic loading activation time as a function of the MCR, and electro-osmosis, exhibits potential as an improved approach for the consolidation of soft soil in engineering practice.
Renan Qin,Hong Nie,Jianyu Zhang,Chuyuan Li,Xiaoqi Zhang,Aihua Xiong,Feng Huang,Zhen Yin,Kongyan Li,Wenyu Qin,Mingzhen Chen,Shubing Zhang,Lingyi Liang,Huiye Zhang,Wencai Ye 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.7
In the present study, the protective effects of gypenosides from Gynostemma pentaphyllum on fatty liver disease (FLD) were examined in rats treated with high fat and cholesterol diet and alcohol. Male SD rats were divided into seven groups: control, model, lovastatin, silymarin, gypenosides high-, medium- and low-treatment groups. The latter 6 groups were fed high-fat and cholesterol diet and administered alcohol intragastricly once a day. Body weight was measured every week for 10 weeks, and the hepatic index was measured after 10 weeks. Compared with model group, levels of serum triglyceride (TG), total cholesterol (TC), free fatty acid (FFA), and low density lipoprotein cholesterol (LDL-C) level, malondialdehyde (MDA), serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activity, and hepatocyte apoptosis were significantly decreased in gypenosides groups; while serum high density lipoprotein cholesterol (HDL-C), superoxide dismutase (SOD) activity in both serum and hepatic tissue and mRNA and protein level of peroxisome proliferator-activated receptor α (PPAR-α) were significantly increased. Moreover, hepatic steatosis and mitochondrial damage were improved. These results suggested that gypenosides could prevent liver fatty degeneration in fatty liver disease through modulating lipid metabolism, ameliorating liver dysfunction and reducing oxidative stress.
Man Zhang,Deyue Yu,Kai Li,Jianyu Liu 한국식물생명공학회 2012 Plant biotechnology reports Vol.6 No.4
Plant 1-deoxy-D-xylulose 5-phosphate reductoisomerase (DXR) were considered to be encoded by single copy. In this study, we successfully isolated two DXR isogenes, designated GmDXR1 and GmDXR2, from soybean. The multicopy nature of DXRs in soybean was supported by Southern blot. Alignment of the two GmDXRs showed the presence of the N-terminal transit peptide for plastids, the conserved cleavage site, prolinerich region, and the NADPH-binding motif. Phylogenetic analysis revealed GmDXR1 and GmDXR2 belonged to different branches of angiosperm DXRs clusters. Expression pattern analysis indicated that GmDXR1 was expressed in all analyzed organs except the pod walls, with the highest level in seeds, whereas no message was detected for GmDXR2. In response to heat stress, GmDXR1 showed declined transcript levels in the experiments; in contrast,GmDXR2 was highly responsive, with mRNA accumulation peaking at 6 h after treatment. We also demonstrated that both GmDXRs were localized in chloroplasts. Overexpression of GmDXRs induced increased contents of various isoprenoids (chlorophyll, carotenoids, and gibberellins),but with reduced level of ABA, indicating that GmDXRs participate in the control of differential isoprenoid biosynthesis of the MEP pathway. This work provides a new insight into the wide presence of multicopies of DXR enzyme in plants.
Design and Characteristic Measurement of 8000 mm Large Aperture Integrating Sphere
Zhao Zhang,Zhi Wan,Xiansheng Li,Hongxing Liu,Jingxu Sun,Zexun Liu,Yamin Wang,Jianwei Ren,Jianyue Ren 한국광학회 2016 Current Optics and Photonics Vol.20 No.4
Integrating spheres play a central role in the radiometric calibration of remote sensors. With thedevelopment of the wide field of view (FOV) remote sensors, aperture diameters of remote sensors arebecoming larger and larger. To satisfy the radiometric calibration requirements of full FOV and fullaperture, an 8000mm diameter large aperture integrating sphere uniform source with a variable exit portwas designed and manufactured. This integrating sphere will be used for pre-launch test and radiometriccalibration of remote satellites. In this paper, optical theories were used to design the output spectralradiance. The LightTools software based on ray-tracing simulation method was used to determine the bestcombination and distribution of inner light sources. A spectral experiment was made to verify the spectralradiance design. To reduce the influence of longtime power-on, a new characteristic measurement methodwas developed to obtain the radiation characteristic of the integrating sphere, which could greatly improvethe measuring efficiency. This method could also be applied to measure other large aperture uniformsources. The obtained results indicate that the spatial uniformity is 98.35%, and the angular uniformityat center position is 98.78%.