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Liu, Yanhong,Kil, Dong Yong,Perez-Mendoza, Victor G.,Song, Minho,Pettigrew, James E. BioMed Central 2018 Journal of animal science and biotechnology Vol.9 No.-
<P><B>Background</B></P><P>There are various fat sources with different energy values and fatty acid compositions that may affect growth performance and carcass composition of grow-finishing pigs. A higher net energy was recently reported in choice white grease compared with soybean oil. Therefore, two experiments were conducted to determine whether practical responses confirm that difference between choice white grease and soybean oil, and to extend the observations to other fat sources.</P><P><B>Results</B></P><P>In Exp. 1, pigs fed fats had lower (<I>P</I> < 0.05) average daily feed intake in phase II and overall period, greater (<I>P</I> < 0.05) gain:feed in phase I, phase II, and overall period than pigs fed the control diet. Pigs fed fats tended (<I>P</I> = 0.057) to have thicker backfat depth at the last rib than those fed control. Pigs fed 6% fats had greater (<I>P</I> < 0.01) gain:feed in phase II and overall period than pigs fed 3% fats. During phase I, pigs fed choice white grease grew faster (<I>P</I> < 0.05) than pigs fed soybean oil. In Exp. 2, pigs fed dietary fats (soybean oil, choice white grease, animal-vegetable blend, palm oil, or tallow) had greater (<I>P</I> < 0.01) gain:feed in each phase and overall period, greater (<I>P</I> < 0.01) average daily gain in phase I, but lower (<I>P</I> < 0.01) average daily feed intake in phase II an overall than pigs fed the control diets. The choice white grease also increased (<I>P</I> < 0.05) average daily gain during phase I compared with soybean oil. Pigs fed palm oil had thicker (<I>P</I> < 0.05) backfat depth at the 10<SUP>th</SUP> rib than those fed soybean oil, animal-vegetable blend, or tallow.</P><P><B>Conclusions</B></P><P>Inclusion of 6% dietary fat improved feed efficiency of finishing pigs, while different fats produced different practical results that may be consistent with their different energy values. Results from the early stage indicate that dietary fats with relatively more saturated fatty acids may provide greater energy than those with relatively more unsaturated fatty acids for growing pigs.</P>
( Yanhong Liu ),( Jeehwan Choe ),( Sheena Kim ),( Byeonghyeon Kim ),( Joy M. Campbell ),( Javier Polo ),( Joe D. Crenshaw ),( James E. Pettigrew ),( Minho Song ) 한국축산학회(구 한국동물자원과학회) 2018 한국축산학회지 Vol.60 No.6
Background: Stress causes inflammation that impairs intestinal barrier function. Dietary spray-dried plasma (SDP) has recognized anti-inflammatory effects and improvement of gut barrier function. Therefore, the purpose of this study was to investigate the effects of dietary SDP on intestinal morphology of mated female mice under stress condition. Results: Villus height, width, and area of small intestines were low on gestation day (GD) 3 or 4 under stress conditions, and higher later (Time, P < 0.05). Crypt depth of colon was low on GD 4 and higher later (Time, P < 0.05). Meanwhile, the SDP treatments improved (P < 0.05) intestinal morphology, indicated by increased villus height, villus width, villus area, and ratio between villus height and crypt depth of small intestines and crypt depth of colon, and by decreased crypt depth of small intestines, compared with the control diet. The SDP treatments also increased (P < 0.05) the number of goblet cells in intestines compared with the control diet. There were no differences between different levels of SDP. Conclusion: Dietary SDP improves intestinal morphology of mated female mice under stress condition.
Structure learning of exponential family graphical model with false discovery rate control
Liu Yanhong,Zhang Yuhao,Li Zhonghua 한국통계학회 2023 Journal of the Korean Statistical Society Vol.52 No.3
Probabilistic graphical models enjoy great popularity in a wide range of domains due to their ability to model the conditional dependency relationships among random variables. This paper explores the structure learning for the exponential family graphical model with false discovery rate (FDR) control. Most existing FDR-con-trolled structure learning procedures have been designed for the Gaussian graphical model (GGM). A systematic approach for more general exponential family graphical models is still lacking. In this paper, we introduce a unified procedure to learn the structure of the exponential family graphical model with FDR control utilizing the symmetrized data aggregation (SDA) technique via sample splitting, data screening, and information pooling. We show that our method controls FDR asymptotically under some mild conditions. Extensive simulation results and two real-data examples validate the effectiveness of our method.
Pose Estimation by Combining IMU Sensor and Vision Sensor
Yanhong Liu(리우옌홍),Yoon Suk Kwak(곽윤석),Soon Ki Jung(정순기) 한국HCI학회 2014 한국HCI학회 학술대회 Vol.2014 No.2
증강현실은 현실 세계에 가상의 추가 정보를 보여주는 기술로, 모바일 어플리케이션, 의료, 교육, 군사 분야에서 널리 쓰이고 있는 기술로 보다 몰입감 있는 환경을 제공하는 기술이다. 하지만 증강현실 시스템은 몇까지 약점을 가지고 있는데 급격하고 긴 움직임이나 어두운 조명환경에서 잘 작동하지 않는다. 본 논문에서는 증강현실의 이러한 약점을 개선하기 위해, 관성센서와 비전센서를 결합한 자세 추정 기술을 제안한다. Augmented reality technique is a hot topic in computer vision, and AR has been widely used in mobile applications, medical domain, education, military, etc. But AR has illumination problem, when vision sensor has long range movements or heavily movements, vision sensor would be not detect AR marker. So we propose pose estimation technique by combining IMU sensor and vision sensor. IMU sensor is added on vision sensor, and estimate pose of vision sensor. Whether IMU sensor can accurately estimate camera pose lonely is our main challenge.
( Zhenyue Feng ),( Defu Liu ),( Ziwen Liu ),( Yimin Liang ),( Yanhong Wang ),( Qingpeng Liu ),( Zhenhua Liu ),( Zhongjing Zang ),( Yudong Cui ) 한국미생물 · 생명공학회 2020 Journal of microbiology and biotechnology Vol.30 No.7
A putative multidrug efflux gene, yddA, was cloned from the Escherichia coli K-12 strain. A drugsensitive strain of E. coli missing the main multidrug efflux pump AcrB was constructed as a host and the yddA gene was knocked out in wild-type (WT) and drug-sensitive E. coliΔacrB to study the yddA function. Sensitivity to different substrates of WT E.coli, E. coliΔyddA, E. coliΔacrB and E. coliΔacrBΔyddA strains was compared with minimal inhibitory concentration (MIC) assays and fluorescence tests. MIC assay and fluorescence test results showed that YddA protein was a multidrug efflux pump that exported multiple substrates. Three inhibitors, ortho-vanadate, carbonyl cyanide m-chlorophenylhydrazone (CCCP), and reserpine, were used in fluorescence tests. Ortho-vanadate and reserpine significantly inhibited the efflux and increased accumulation of ethidium bromide and norfloxacin, while CCCP had no significant effect on YddA-regulated efflux. The results indicated that YddA relies on energy released from ATP hydrolysis to transfer the substrates and YddA is an ABC-type multidrug exporter. Functional study of unknown ATP-binding cassette (ABC) superfamily transporters in the model organism E. coli is conducive to discovering new multidrug resistance-reversal targets and providing references for studying other ABC proteins of unknown function.
변보영,Yanhong Liu,Juming Tang,강동현,조홍연,황한준,마재형 한국식품과학회 2011 Food Science and Biotechnology Vol.20 No.3
To evaluate a heat-shock condition for the enumeration of Clostridium sporogenes spores, a surrogate for C. botulinum spores, we examined the heat tolerance of C. sporogenes spores and vegetative cells exposed to a heat shock at 90^oC. From the D values of the spores determined in the temperature range of 113-121^oC, z value (±SD) and D90°C value were estimated to be 10.16±0.90^oC and 1,071.52 min, respectively, and the inactivation rates were predicted to be only approximately 2% at 90^oC for up to 10min. Meanwhile, the viable count of spores was significantly higher when activated under a heat-shock condition of 90^oC for over 9 min than those activated for shorter time periods. The heat tolerance of vegetative cells was extremely low, showing a D90°C value (±SD) of 0.21±0.01 min. Finally, 3 different heat-shock conditions were compared:70^oC for 30 min, 80^oC for 20 min, and 90^oC for 10 min,and the experimental comparative data showed no significant differences in viable spore counts. Consequently, these results support that the heat-shock treatment at 90^oC for 10min is suitable to activate spores and to inactivate vegetative cells of C. sporogenes.
A Dominant Mutation in ARL2 Causes Impaired Adventitious Root Development in Rice
Shiping Liu,Yanhong Xue,Xiaofei Wang,Botao Zhang,Yuting Bi,Min Qiu,Guangxi Wang,Ping Wu 한국식물학회 2011 Journal of Plant Biology Vol.54 No.4
Adventitious roots are vital for water and nutrient assimilation by cereal crops because they comprise the bulk of the fibrous root system. We isolated and analyzed a rice mutant, adventitious rootless 2 (arl2), which failed to initiate adventitious root primordia during early development. Its seminal root produced fewer lateral roots than from the wild type. This mutant also exhibited pleiotropic phenotypes of longer and thicker seminal roots, a different morphology for the first leaf, delayed heading, and a greater tiller angle. Physiological experiments showed that exogenous auxin and ethylene could rescue adventitious root growth, a response opposite that for two previously reported mutants, arl1 and gnom1. Activity in the auxin signal pathway and the polar auxin transport system was normal for arl2. Compared with the wild type, arl2 plants showed enhanced sensitivity to ethephon but decreased sensitivity to AgNO_3, an inhibitor of ethylene. Genetics analysis demonstrated that this mutant is controlled by a single dominant gene; ARL2 was mapped within a 100-kb interval on the short arm of chromosome 2.
Overexpression of OsVP1 and OsNHX1 Increases Tolerance to Drought and Salinity in Rice
Shiping Liu,Luqing Zheng,Yanhong Xue,Qian Zhang,Lu Wang,Huixia Shou 한국식물학회 2010 Journal of Plant Biology Vol.53 No.6
Drought and salinity are major abiotic stresses affecting rice production. To improve plant tolerance to salinity and drought, we overexpressed rice Na+/H+ exchangers (OsNHX1) and H+-pyrophosphatase in tonoplasts (OsVP1) in a japonica elite rice cultivar, Zhonghua 11. Compared with our wild-type control, transgenic plants overexpressing both genes incurred less damage when exposed to long-term treatment with 100 mM NaCl or water deprivation. Under high-saline conditions, the transformants accumulated less Na+ and malondialdehyde in the leaves,thereby allowing the plants to maintain a low level of leaf water potential and reduce stress-induced damage. Those transgenics also had higher photosynthetic activity during the stress period. Under those conditions, they also showed an increase in root biomass, which enabled more water uptake. These results suggest that OsVP1 and OsNHX1 improve the tolerance of rice crops against drought and salt by employing multiple strategies in addition to osmotic regulation.