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Quantifying biochemical variables of corn by hyperspectral reflectance at leaf scale

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第5期9卷 378-384页

作者： Qiu-xiang YI Jing-feng HUANG fu-min wang Xiu-zhen wang Institute of Remote Sensing and lnformation Technology Zhejiang University Hangzhou 310029 China Institute of Zhejiang Meteorology Hangzhou 310004 China

To further develop the methods to remotely sense the biochemical content of plant canopies,we report the results of an experiment to estimate the concentrations of three biochemical variables of corn,i.e.,nitrogen(N),crude fat(EE) and crude fiber(CF) concentrations,by spectral reflectance and the first derivative reflectance at fresh leaf scale. The correlations between spectral reflectance and the first derivative transformation and three biochemical variables were analyzed,and a set of estimation models were established using curve-fitting analyses. Coefficient of determination(R2),root mean square error(RMSE) and relative error of prediction(REP) of estimation models were calculated for the model quality evaluations,and the possible opti-mum estimation models of three biochemical variables were proposed,with R2 being 0.891,0.698 and 0.480 for the estimation models of N,EE and CF concentrations,respectively. The results also indicate that using the first derivative reflectance was better than using raw spectral reflectance for all three biochemical variables estimation,and that the first derivative reflectances at 759 nm,1954 nm and 2370 nm were most suitable to develop the estimation models of N,EE and CF concentrations,respectively. In addition,the high correlation coefficients of the theoretical and the measured biochemical parameters were obtained,especially for nitrogen(r=0.948).

关键词： Biochemical variables Corn The first derivative spectral reflectance Spectral reflectance

Optimal waveband identification for estimation of leaf area index of paddy rice

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第12期9卷 953-963页

作者： fu-min wang Jing-feng HUANG Qi-fa ZHOU Xiu-zhen wang Institute of Agricultural Remote Sensing and lnformation Application Zhejiang University Hangzhou 310029 China College of Life Sciences Zhejiang University Hangzhou 310058 China Zhejiang Meteorological Institute Hangzhou 310004 China

The objectives of the study were to select suitable wavebands for rice leaf area index （LAI） estimation using the data acquired over a whole growing season, and to test the efficiency of the selected wavebands by comparing them with feature positions of rice canopy spectra. In this study, the field experiment in 2002 growing season was conducted at the experimental farm of Zhejiang University, Hangzhou, China. Measurements of hyperspectral reflectance （350-2500 nm） and corresponding LAI were made for a paddy rice canopy throughout the growing season. And three methods were employed to identify the optimal wavebands for paddy rice LAI estimation： correlation coefficient-based method, vegetation index-based method, and stepwise regression method. This research selected 15 wavebands in the region of 350-2500 nm, which appeared to be the optimal wavebands for the paddy rice LAI estimation. Of the selected wavebands, the most frequently occurring wavebands were centered around 554, 675, 723, and 1633 rim. They were followed by 444, 524, 576, 594, 804, 849, 974, 1074, 1219, 1510, and 2194 rim. Most of them made physical sense and had their counterparts in spectral known feature positions, which indicates the promising potential of the 15 selected wavebands for the retrieval of paddy rice LAI.

关键词： Rice Hyperspectral reflectance Leaf area index (LAI) Wavebands identification

De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

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Science China Chemistry 2025年第1期68卷 174-180页

作者： Fan-Xiao Meng Xing-Yu wang Ka Lu Ju-Song Yang fu-min Zhang Ai-Jun Ma Bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

关键词： benzofuran atropisomers novel de novo synthetic strategy asymmetric formal [3 + 2] cycladdition Cu/SPDO complex DFT calculations

硅胶负载磷钨酸催化剂上苯与1-十二烯烷基化

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石油化工 2003年第9期32卷 747-751页

作者：朱海鸥张富民王军南京工业大学化学化工学院江苏南京210009

以硅胶为载体 ,用浸渍法制备了不同负载量的磷钨酸催化剂 ,通过X射线衍射 (XRD)、程序升温氨脱附 (NH3-TPD)以及低温N2 吸附技术表征了催化剂的物理化学性质 ,并且考察了催化剂在苯与 1-十二烯烷基化反应中的催化性能。结果表明 ,硅胶... 详细信息

以硅胶为载体 ,用浸渍法制备了不同负载量的磷钨酸催化剂 ,通过X射线衍射 (XRD)、程序升温氨脱附 (NH3-TPD)以及低温N2 吸附技术表征了催化剂的物理化学性质 ,并且考察了催化剂在苯与 1-十二烯烷基化反应中的催化性能。结果表明 ,硅胶负载磷钨酸催化剂具有转化率高、选择性好等特点 ;通过改变催化剂预处理温度和杂多酸负载量 ,可有效地调整催化剂的反应性能 ;磷钨酸最佳负载量为 40 % (质量分数 ) ,催化剂最佳活化温度为 3 0 0℃ ,此时反应转化率为 71 4% ,2 -苯基十二烷的选择性为 41 9%。与HY沸石相比 ,硅胶负载磷钨酸催化剂具有更高的转化率。

关键词：杂多酸磷钨酸催化剂硅胶 1-十二烯直链烷基苯苯烷基化

Reversing anther thermotolerance by manipulating the cis-elements in the promoter of a high-temperature upregulated gene Casein Kinase I in upland cotton

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Science China Life Sciences 2025年

作者： Yanlong Li Yinuo fu Yaoyao Li Rui Zhang Jing Yang Huanhuan Ma Ling min Xianlong Zhang National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University

High temperature (HT) stress causes male sterility,leading to reduced upland cotton ***,we identified a key gene,Casein Kinase I (GhCKI),that negatively regulates male fertility in upland cotton under ***,conventional genetic manipulations of GhCKI would result in male sterility,hindering its utilization in breeding ***,we engineered quantitative variation for anther thermotolerance-related traits in upland cotton by creating weak promoter alleles of GhCKI genes,using CRISPR/Cas9 and CRISPR/Cpf1genome ***,we screened and identified two new upland cotton plant lines exhibiting a HT-tolerant phenotype with edited GhCKI promoters,and characterized their corresponding heat-tolerant allelic *** research revealed that the primary reason for the HT tolerance of the GhCKI promoter editing mutants is that the trans-acting factors GhMYB73 and GhMYB4,which positively regulate GhCKI expression under HT,failed to bind and activate the expression of ***,our study not only provides a rapid strategy to generate new beneficial alleles but also offers novel germplasm resources and molecular insights for crop HT tolerance breeding.

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乳腺癌骨转移患者放疗后的预后分析

中国肿瘤临床与康复 2017年第4期24卷 436-439页

作者：贺丹付波王敏成都市核工业四一六医院肿瘤科成都610000

目的探讨乳腺癌骨转移患者放疗后的预后情况。方法选取2008年1月至2013年5月间成都市核工业四一六医院收治的60例乳腺癌骨转移患者为研究对象。回顾性分析患者病历,并对患者进行1~3年的随访,收集记录患者放疗后的骨质破坏情况、绝经状... 详细信息

目的探讨乳腺癌骨转移患者放疗后的预后情况。方法选取2008年1月至2013年5月间成都市核工业四一六医院收治的60例乳腺癌骨转移患者为研究对象。回顾性分析患者病历,并对患者进行1~3年的随访,收集记录患者放疗后的骨质破坏情况、绝经状态、碱性磷酸酶(ALP)值和血清钙等指标,统计患者初诊乳腺癌治疗后无病生存时间、骨外转移病灶和放疗有效率等情况,并进行比较分析。结果不成瘤乳腺癌患者初诊后无病生存期<2年的病例数占患者总数比例的87.5%,成瘤乳腺癌患者为12.5%;不成瘤乳腺癌患者有骨外转移病灶占患者总数比为88.9%,成瘤乳腺癌患者为11.1%;差异均有统计学意义(均P<0.05)。60例患者中,疼痛完全缓解患者46例(76.7%);部分缓解患者2例(3.3%);无缓解患者12例(20.0%)。疼痛完全缓解患者比例明显高于其他两类患者,差异有统计学意义(P<0.05)。患者放疗后1年生存率为58.3%(35/60),2年生存率为28.3%(17/60),3年生存率为13.3%(8/60)。患者骨转移病灶成瘤样改变、脊髓压迫和骨转移病灶数目是影响乳腺癌骨转移患者预后的独立因素,差异均有统计学意义(均P<0.05)。结论骨转移病灶成瘤样改变、脊髓压迫与骨转移病灶数目是影响患者放疗预后的独立危险因素,应加大对乳腺癌骨转移患者这几方面的观察及随访力度。

关键词：乳腺肿瘤骨转移放疗预后

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腰椎小关节退变的CT诊断价值

实用放射学杂志 2004年第12期20卷 1107-1109页

作者：殷好治梁福民王希林傅晓芹梁付奎山东省昌乐县人民医院CT室山东省昌乐县人民医院CT室山东昌乐262400

目的　引起临床与影像医学界对关节突关节病的重视。方法　用本组病例结合文献对关节突关节病的发病与CT表现进行综合研究。结果　通过 94例关节突关节病的CT所见 ,总结出 5项主要征象 :①关节增生肥大及骨赘形成 ;②关节间隙狭窄或宽... 详细信息

目的　引起临床与影像医学界对关节突关节病的重视。方法　用本组病例结合文献对关节突关节病的发病与CT表现进行综合研究。结果　通过 94例关节突关节病的CT所见 ,总结出 5项主要征象 :①关节增生肥大及骨赘形成 ;②关节间隙狭窄或宽窄不等 ;③关节间隙内真空现象 ;④关节囊肥厚或钙化 ;⑤关节不稳。结论　关节突关节病是一种发病率很高的疾病 ,CT扫描对本病具有重要意义。

关键词：关节突关节病关节囊真空现象