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Guo,Xue-Liang,Huang,Mei-Yuan,Chung,Yong-Seung,Zhou,Ling 한국교원대학교 환경과학연구소 2000 환경연구논문집 Vol.- No.5
중국 북부지방의 관측자료와 강우 category model을 이용하여 강수 발생의 미세과정과 전형적인 층운 3가지 종류가 형성될 때의 빙정 역할이 분석되었다. 종류 Ⅰ는 강한 전선면의 광범위한 상승에 따른 층운의 형성으로서 강우의 발생은 주로 수증기의 침전과 상층 구름 속 빙정위의 riming과정에 좌우된다. 이때 빙정은 높은 구름에 매우 큰 농도로 존재하여 강수의 형성에 중요한 역할을 하며 이 구름 종류의 seeder-feeder 과정으로 고려된다. 종류 Ⅱ는 저기압 규모의 수렴에 의해 형성되는 층운으로서 riming에 의해 성장되는 빙정과정에 따라 발생되는 강수이다. 종류 Ⅲ은 약한 전선면상에 발생되는 광범위한 상승 기류에 동반되어 낮은 구름층에서 형성된다. 구름 방울들의 충돌과 구름 방울 및 빗방울 사이의 충돌은 이런 강우 형성의 중요 과정임이 밝혀졌다. Based on the observations in northern China, the microphysical process of precipitation formation and the role of ice crystal playing in this process for three kinds of typical stratiform clouds are analyzed using rain category model. Results show that for type one, namely stratiform cloud system formed by widespread lifting of a strong frontal surface, the original formation of rainfall depends mainly on vapor deposition and riming process on ice particles from aloft. Ice crystal has a high number concentration in high level of cloud due to the lower temperature and plays a very important role in the formation of precipitation and shows clearly the "seeder-feeder" process in this kind of cloud; For type two, namely stratiform cloud system produced by cyclonic scale convergence which provides liquid water, the primary precipitation is due to the process of ice crystal growing by riming; Type three is the shallow layer cloud system associated with widespread lifting of a weak frontal surface system.
Liang, Shuang,Guo, Jing,Jin, Yong Xun,Yuan, Bao,Zhang, Jia-Bao,Kim, Nam-Hyung Elsevier 2018 Theriogenology Vol.106 No.-
<P><B>Abstract</B></P> <P>C-Phycocyanin (C-PC), a protein from green microalgae, has been suggested to possess various biological activities, including antioxidant and free radical scavenging properties. The aim of the current study was to explore the effects of C-PC on the maturation of porcine oocytes and subsequent developmental competence after parthenogenetic activation and somatic cell nuclear transfer (SCNT) as well as the underlying mechanisms. There was no significant improvement in nuclear maturation rates between the control and C-PC supplementation groups (1, 3, 5, 10 μg/mL). However, supplementation of 5 μg/mL C-PC in the maturation medium significantly increased blastocyst formation and hatching rates after parthenogenetic activation (59.6 ± 3.6% and 33.0 ± 2.6% vs. 49.8 ± 3.5% and 27.4 ± 2.4%, respectively). In addition, the presence of C-PC during the maturation period significantly improved blastocyst formation rates and total cell numbers after SCNT (24.8 ± 1.9% and 42.2 ± 3.3 vs. 21.6 ± 2.2% and 39.5 ± 3.4, respectively) compared to the control group. Furthermore, cellular proliferation and the expression of pluripotency-related genes (<I>SOX2</I> and <I>NANOG</I>) were increased in cloned blastocysts derived from the C-PC supplemented group. Importantly, C-PC supplementation during maturation not only improved cumulus expansion and increased the expression of cumulus expansion-related genes (<I>HAS2</I>, <I>PTX3</I>, and <I>PTGS2</I>), but also enhanced antioxidant capacity, improved mitochondria function, and decreased cathepsin B activity in porcine oocytes. These results demonstrate that C-PC may be useful for improving porcine oocyte quality and subsequent developmental competence in embryos.</P> <P><B>Highlights</B></P> <P> <UL> <LI> C-Phycocyanin significantly increased the developmental competence of porcine parthenogenetic and cloned embryos. </LI> <LI> C-Phycocyanin enhanced antioxidant capacity, improved mitochondria function, and decreased cathepsin B activity in porcine oocytes. </LI> </UL> </P>
Guo-Liang Wang,Shaohong Qu,Zhengjie Yuan,Yu Zhang,Guojuan Xu,Dongling Bi,Haiyan Qu,Xiaowei Zou,Xiaoqing Gao,Haihe Yang,Haiyan He,Xuli Wang,Jiandong Bao,Shimin Zuo,Xuebiao Pan,Bo Zhou 한국식물학회 2018 Journal of Plant Biology Vol.61 No.3
Rice sheath blight (SB), caused by Rhizoctoniasolani (R. solani), is a major threat to rice productionworldwide. The molecular mechanisms of the SB resistancein rice are poorly understood. The transcriptomes of the SBresistantrice cultivar YSBR1 and the susceptible cultivarLemont were analyzed after R. solani infection. A total of7624 differentially expressed genes (DEGs) were identifiedat one or more timepoints in a cultivar. 5526 and 5618 DEGswere differentially expressed in Lemont and YSBR1,respectively. YSBR1 exhibited stronger and earlier transcriptionalresponse to R. solani than Lemont. Gene ontology enrichmentanalysis revealed that genes that encode cell wall-modifyingand glycosyl-degrading enzymes or anti-microbial proteinswere specifically induced in YSBR1 at 6 hpi. MapMananalysis revealed that more DEGs related with cell wall, β-glucanses, respiratory burst, phenylpropanoids and ligninwere highly induced by R. solani in YSBR1 than in Lemont. The results also showed that receptor-like kinases and jasmonicacid signaling may play important roles in host resistance toR. solani. This study highlights potential candidate genes andsignaling pathways involved in rice sheath resistance and canhelp to further clarify the mechanistic events underlyingresistance and susceptibility to R. solani.
The effects of nitrobenzene on the genetic toxicity in tobacco seedling leaf cells by comet assay
Zening Yuan,Yuwei Cao,Liang Si,Dehui Wang,Changhong Guo 대한독성 유전단백체 학회 2011 Molecular & cellular toxicology Vol.7 No.3
Nitrobenzene (NB) is a synthetic hydrocarbon widely used in industries which is a highly toxic environmental pollutant. To investigate its genetic toxicity to plants, tobacco seedlings were exposed to varying concentration of NB solution for short-term (24hours). The comet assay was used to examine the DNA damage in tobacco leaf cells under the stress of NB. The DNA migration increased with the dose of NB (from 10 to 100 mg/L). The values of tail intensity (TDNA),tail moment (TM), and olive tail moment (OTM)increased linearly with NB concentrations between 5mg/L and 100 mg/L. The results suggest that NB has genotoxic effect on the molecular level in tobacco leaf cells. The comet parameters were significantly different from the control when NB concentrations were higher than 5 mg/L (P⁄0.05), suggesting that tobacco leaf cells have high sensitivity to NB stress. The phenomena demonstrated that the tobacco comet assay could be used efficiently monitor aquatic pollution caused by the toxic chemicals. In addition, a similar evaluation was performed using different NB and antioxidant ascorbic acid (Vc) mixed solutions. The DNA damage in the antioxidant group were significantly lower than those in the group without antioxidant, which illustrates that antioxidants could partially decrease the DNA damage induced by NB. These results suggest that oxidation reactions caused by NB might be one of the factors that lead to DNA damage in plants. However, to process the possible participation of mechanisms of DNA damage caused by NB, further investigation will need.
Shuang Liang,Jing Guo,Yong Xun Jin,Bao Yuan,Jia-Bao Zhang,Nam-Hyung Kim 한국동물생명공학회(구 한국동물번식학회) 2017 발생공학 국제심포지엄 및 학술대회 Vol.2017 No.10
C-Phycocyanin (C-PC), a protein from green microalgae, has been suggested to possess various biological activities, including antioxidant and free radical scavenging properties. The aim of the current study was to explore the effects of C-PC on the maturation of porcine oocytes and subsequent developmental competence after parthenogenetic activation and somatic cell nuclear transfer (SCNT) as well as the underlying mechanisms. There was no significant improvement in nuclear maturation rates between the control and C-PC supplementation groups (1, 3, 5, 10 μg/mL). However, supplementation of 5 μg/mL C-PC in the maturation medium significantly increased blastocyst formation and hatching rates after parthenogenetic activation (59.6±3.6% and 33.0±2.6% vs. 49.8±3.5% and 27.4±2.4%, respectively). In addition, the presence of CPC during the maturation period significantly improved blastocyst formation rates and total cell numbers after SCNT (24.8±1.9% and 42.2±3.3 vs. 21.6±2.2% and 39.5±3.4, respectively) compared to the control group. Furthermore, cellular proliferation and the expression of pluripotency-related genes (SOX2 and NANOG) were increased in cloned blastocysts derived from the C-PC supplemented group. Importantly, C-PC supplementation during maturation not only improved cumulus expansion and increased the expression of cumulus expansion-related genes (HAS2, PTX3, and PTGS2), but also enhanced antioxidant capacity, improved mitochondria function, and decreased cathepsin B activity in porcine oocytes. These results demonstrate that C-PC may be useful for improving porcine oocyte quality and subsequent developmental competence in embryos.
Ying-Yuan Lu,Xiao-Wei Wang,Xin Wang,Wen-Bing Dai,Qiang Zhang,Pu Li,Ya-Qing Lou,Chuang Lu,Jun-Yi Liu,Guo-Liang Zhang 대한약학회 2016 Archives of Pharmacal Research Vol.39 No.7
The purpose of this study was to characterize the disposition, distribution, excretion and plasma protein binding of 6-benzyl-1-benzyloxymethyl-5-iodouracil (W- 1) in rats. Concentrations of W-1 within biological samples were determined using a validated high performance liquid chromatography method. The plasma protein binding of W-1 was examined by equilibrium dialysis method. After oral administration of W-1 (50, 100 and 200 mg/kg, respectively) in self-microemulsifying drug delivery system formulation, the pharmacokinetic parameters of W-1 were as follows: the peak plasma concentrations (Cmax) were 0.42, 1.50 and 2.55 μg/mL, the area under the curve (AUC0-t) were 0.89, 2.27 and 3.96 lg/h mL and the plasma half-life (t1/2) were 5.15, 3.77 and 3.77 h, respectively. Moreover, the prototype of W-1 was rapidly and extensively distributed into fifteen tissues, especially higher concentrations were detected in intestine, stomach and liver, respectively. The plasma protein binding of W-1 in rat, beagle dog and human were in the range of 97.96–99.13 %. This study suggested that W-1 has an appropriate pharmacokinetics in rats, such as rapid absorption, moderate clearance, and rapid distribution to multiple tissues. Those properties provide important information for further development W-1 as an anti-HIV-1 drug candidate.
Pengfei Guo,Kengkeng Ye,Zhigang Tao,Hongda Liang,Yadi Yuan 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.5
To improve the effectiveness of the directional-predetermined crack blasting in the weak and alternate composite roof, this paper took the coal-containing composite roof of the 12201 working face of Halagou Coal Mine as the engineering background, and based on the technical principles of roof cutting pressure releasing gob-side entry retaining, comprehensive used of theoretical analysis, field experiments and other means, carried out in-depth research on the shaped energy blasting method and parameter design of the coal-containing composite roof. The results show: Through theoretical analysis, in the process of shaped energy blasting, the air column in the hole can reduce the peak blast pressure, which can effectively prevent the weak surrounding rock in the hole from being damaged in the non-cumulative direction and enhance the pre-splitting effect. During detonation at the bottom, the instantaneous pressure in the blast hole is lower than that of detonation at the top, and the action time of blast pressure is longer than detonation at the top. When the buried depth of the explosive (near the blast hole) is less than the critical depth, a "V"-shaped blasting funnel will be formed after the rock blasting, and the critical depth is proportional to the charge. Through field tests on the charge quantity and the length of the sealing mud, when the blast hole depth is 6m, the charge parameters of "3+2+0+1" have a better effect of energy-concentrating blasting, and the crack rate reaches 87%. Besides, field tests have shown that when shaped energy blasting is carried out on soft and hard rock formations, the stemming separation in the shaped energy tube at the interlayer position can ensure the directional pre-cracking effect of hard rock, while effectively avoiding damage to the weak rock formation in the non-cumulative direction.