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Lake-Based Nursery Rearing of Nile Tilapia (Oreochromis niloticus) Fingerlings in Nylon Hapas: Effects of Stocking Density on Growth, Survival and Profitability

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Agricultural Sciences 2016年第10期7卷 660-669页

作者： Amos Asase Francis Kofi Ewusie Nunoo Felix Yao Klenam Attipoe department of Fisheries and Water {1. University of Energy and Natural Resources Sunyani Ghana department of Marine and Fisheries Sciences University of Ghana Legon Ghana CSIR/Water Research Institute Aquaculture Research and Development Centre Akosombo Ghana

The inadequate supply of tilapia fingerling is a major limitation to cage culture development in Ghana. Lake-based hapa systems are very efficient in nursing fingerlings although the process can be tricky due to inherent effects of stocking densities and environmental factors. This study aimed at assessing the growth, survival and profitability of Nile tilapia (Oreochromis niloticus) fingerlings of the Akosombo strain reared in nine 1.m3 Lake-based hapas at different densities. Each hapa was stocked with 2.1. ± 0.1. g sex-reversed tilapia fingerlings at varying stocking densities of 400 fish/m3, 800 fish/m3 and 1.00 fish/m3 serving as treatments T1. T2 and T3 respectively. Each treatment was replicated thrice. Bi-weekly samplings were done and water quality parameters were measured. After the experiment, analysis of variance showed significant differences (p

关键词： Hapa Fingerlings Stocking Density Tilapia

Mechanical properties of gangue-containing aluminosilicate based cementitious materials

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Journal of University of Science and Technology Beijing 2006年第2期13卷 183-189页

作者： Huajian Li Henghu Sun Xuejun Xiao Hongxia Chen department of Material Science and Engineering Tsinghua University Beijing 100084 China Deportment of resources China University of Mining ＆ Technology （Beijing） Beijing 100083 China

High performance aluminosilicate based cementitious materials were produced using calcined gangue as one of the major raw materials. The gangue was calcined at 500℃. The main constituent was calcined gangue, fly ash and slag, while alkali-silicate solutions were used as the diagenetic agent. The structure of gangue-containing aluminosilicate based cementitious materials was studied by the methods of IR, NMR and SEM. The results show that the mechanical properties are affected by the mass ratio between the gangue, slag and fly ash, the kind of activator and additional salt. For 28-day curing time, the compressive strength of the sample with a mass proportion of 2：1.1.（gangue： slag： fly ash） is 58.9 MPa, while the compressive strength of the sample containing 80wt% gangue can still be up to 52.3 MPa. The larger K^＋ favors the formation of large silicate oligomers with which AI（OH）4- prefers to bind. Therefore, in Na-K compounding activator solutions more oligomers exist which result in a stronger compressive strength of aluminosilicate-based cementitious materials than in the case of Na-containing activator. The reasons for this were found through IR and NMR analysis. Glauber＇s salt reduces the 3-day compressive strength of the paste, but increases its 7-day and 28-day compressive strengths.

关键词： gangue slag fly ash aluminosilicate based cementitious materials mechanical properties

Single-cell transcriptomics reveals tumor landscape in ovarian carcinosarcoma

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第8期25卷 686-699页

作者： Junfen XU Mengyan TU department of Gynecologic Oncology Women’s HospitalZhejiang University School of MedicineHangzhou 310006China Zhejiang Provincial Clinical Research Center for Obstetrics and Gynecology Hangzhou 310006China

Objective:The present study used single-cell RNA sequencing(scRNA-seq)to characterize the cellular composition of ovarian carcinosarcoma(OCS)and identify its molecular ***:scRNA-seq was performed in resected primary OCS for an in-depth analysis of tumor cells and the tumor *** staining was used for *** scRNA-seq data of OCS were compared with those of high-grade serous ovarian carcinoma(HGSOC)tumors and other OCS ***:Both malignant epithelial and malignant mesenchymal cells were observed in the OCS patient of this *** identified four epithelial cell subclusters with different biological *** them,epithelial subcluster 4 presented high levels of breast cancer type 1.susceptibility protein homolog(BRCA1.and DNA topoisomerase 2-α(TOP2A)expression and was related to drug resistance and cell *** analyzed the interaction between epithelial and mesenchymal cells and found that fibroblast growth factor(FGF)and pleiotrophin(PTN)signalings were the main pathways contributing to communication between these ***,we compared the malignant epithelial and mesenchymal cells of this OCS tumor with our previous published HGSOC scRNA-seq data and OCS *** the epithelial subclusters in the OCS tumor could be found in the HGSOC ***,the mesenchymal subcluster C1. exhibited specific expression patterns in the OCS tumor,characterized by elevated expression of cytochrome P450 family 24 subfamily A member 1.CYP24A1.,collagen type XXIIIα1.chain(COL23A1.,cholecystokinin(CCK),bone morphogenetic protein 7(BMP7),PTN,Wnt inhibitory factor 1.WIF1.,and insulin-like growth factor 2(IGF2).Moreover,this subcluster showed distinct characteristics when compared with both another previously published OCS tumor and normal ovarian ***:This study provides the single-cell transcriptomics signature of human OCS,which constitutes a new resource for elucidating OCS diversity.

关键词： Ovarian carcinosarcoma Single-cell RNA sequencing(scRNA-seq) Tumor heterogeneity

Rose solutions with three petals for planar 4-body problems

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Science China Mathematics 2010年第12期53卷 3085-3094页

作者： DENG ChunHua 1.2 , ZHANG ShiQing 1. & ZHOU Qing 3 1.Yangtze Center of Mathematics and College of Mathematics, Sichuan University, Chengdu 61.064, China 2 Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huai’an 223001. China 3 department of Mathematics, East China Normal University, Shanghai 200062, China 1. Yangtze Center of Mathematics and College of Mathematics Sichuan University Chengdu 610064 China2. Faculty of Mathematics and Physics Huaiyin Institute of Technology Huai’an 223001 China3. Department of Mathematics East China Normal University Shanghai 200062 China

For planar Newtonian 4-body problems with equal masses, we use variational methods to prove the existence of a non-collision periodic choreography solution such that all bodies move on a rose-type curve with three pet... 详细信息

关键词： 4-body problems with Newtonian potentials rose solutions with three petals winding numbers variational minimization methods

Effects of lanthanum and gadolinium on proliferation and differentiation of primary osteoblasts

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Progress in natural Science:Materials International 2007年第5期17卷 618-623页

作者： Zhang Dawei , Zhang Jinchao , Chen Yao , Yang Mengsu and Yao Xinsheng (department of {1. Products Chemistry, Shenyang Pharmaceutical University, Shenyang 1.001., China Shenzhen Research Institute of City University of Hong Kong, Shenzhen 51.057, China department of Biology and Chemistry, City University of Hong Kong, China department of Chemistry, College of Chemistry & Environmental Science, Hebei University, Baoding 071.02, China Key Laboratory for Research and Development of Traditional Chinese Medicine and {1. Medicine at Shenzhen, Shenzhen 51.057, China) [a]department of {1. Products Chemistry Shenyang Pharmaceutical University Shenyang China [b]Shenzhen Research Institute of City University of Hong Kong Shenzhen China [c]department of Biology and Chemistry City University of Hong Kong China [d]department of Chemistry College of Chemistry & Environmental Science Hebei University Baoding China [e]Key Laboratory for Research and Development of Traditional Chinese Medicine and natural Medicine at Shenzhen Shenzhen China

The effects of La3+ and Gd3+ on the proliferation, differentiation and adipogenic transdifferentiation of rat calvarial osteoblast-like cells (ROB cells) were evaluated by MTT method, measuring the activity of alkaline phosphatase (ALP) and Oil red O measurement. Both of La3+ and Gd3+ inhibited the proliferation of ROB cells at all concentrations (1.1.-5, 1.1.-6, 1.1.-7, 1.1.-8, 1.1.-9 mol·L-1.. La3+ at concentration of 1.1.-5mol·L-1.significantly increased the alkaline phosphatase activity of ROB cells up to 3 folds (P1.. However, the effects reversed to inhibit at other concentrations. Gd played a negative role in the alkaline phosphatase activity. La3+ inhibited the adipogenic transdifferentiation of ROB cells at all concentrations in a dose-dependent way. However, Gd promoted the adipogenic transdifferentiation of ROB cells at 1.1. and 1.1. mol·L . These findings suggested that the effects of rare earth elements on the proliferation, differentiation and adipogenic transdifferentiation of ROB cells were dependent on their concentrations and species.

关键词： lanthanum gadolinium osteoblast-like cells proliferation differentiation transdifferentiation.

Effects of seasonal variations on soil microbial community composition of two typical zonal vegetation types in the Wuyi Mountains

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Journal of Mountain Science 2016年第6期13卷 1056-1065页

作者： WU Ze-yan LIN Wen-xiong LI Jian-ju LIU Jin-fu LI Bai-lian WU Lin-kun FANG Chang-xun ZHANG Zhi-xing Life Sciences College of Fujian Agriculture and forestry University Fuzhou 350002 China Ecological Complexity and Modeling Laboratory University of California Riverside Riverside CA92507 USA forestry College of Fujian Agriculture and forestry University Fuzhou 350002 China Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring School of Life Sciences Fujian Agriculture and Forestry University Fuzhou 350002 China Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and forestry University) Fujian Province University Fuzhou 350002 China

Seasonal shifts play an important role in soil microbial community composition. This study examined the hypothesis that soil microbial community structure would vary with seasonal shifts in the Wuyi Mountains in Southeast China, and that two representative tree species （Castanopisi carlesii and Cunninghamia lanceolata） may have different soil microbial community composition. Phospholipids fatty acid analysis （PLFA） of seasonal shifts and was used to assess the effect vegetation types on soil microbial community structure. A total of 22 different PLFAs were identified from all the soil samples. The bacterial PLFAs accounted for 62.37% of the total PLFAs, followed by fungi （28.94%）, and the minimum was actinomycetes （6.41.）. Overall, the level of PLFAs in C. carlesii soil was greater than those in C. lanceolata soil, and significant differences were observed in some seasons. The amounts of total, bacteria, actinomycic and fungal PLFAs significantly changed with the seasons and followed a sequence order （summer 〉 autumn 〉 spring 〉 winter）. The bacteria/fungi PLFAs and G （＋）/G （-） PLFAs of two vegetation types also changed with the seasons and the ratios in summer and autumn were higher than those in spring and winter. The correlation analysis of microbial PLFAs and soil physicochemical properties showed that the total, bacteria, fungal, actinomycic, G （＋） and G （-） PLFAs were significantly positive correlation with TOC, TN, TP, TK and moisture content. We concluded that the seasonal shifts and vegetation types affect soil microbial community composition by changing the soil physicochemical properties.

关键词： Seasonal shifts Soil microbes Community composition Castanopisi carlesii Cunninghamia lanceolata

Structural properties of GaN(0001. epitaxial layers revealed by high resolution X-ray diffraction

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Science China(Physics,Mechanics & Astronomy) 2010年第1期53卷 68-71页

作者： XIE ZiLi 1.2,3, ZHOU YuanJun 1., SONG LiHong 1.2 , LIU Bin 1., HUA XueMei 1.2 , Xiu XiangQian 1., ZHANG Rong 1.2,3 & ZHENG YouDou 1.2,3 1.JiangSu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and department of Physics, Nanjing University, Nanjing 21.093, China 2 Nanjing National Laboratory of Microstructures, Nanjing 21.093, China 3 NJU-Yangzhou Institute of Opto-electronics, Yangzhou, 225001. China 1. JiangSu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and department of Physics Nanjing University Nanjing 210093 China2. Nanjing National Laboratory of Microstructures Nanjing 210093 China3. NJU-Yangzhou Institute of Opto-electronics Yangzhou 225001 China

High-resolution X-ray diffraction has been used to analyze GaN(0001. epitaxial layers on sapphire substrates. Several structural properties of GaN, including the lattice constants, strains, and dislocation densities are revealed by the technique of X-ray dffraction (XRD). Lattice constants calculated from the omega/2theta scan are c=0.51.5 nm and a=0.31.7 nm. Also, the in-plane strain is -1.003%, while out of the plane, the epitaxial film is almost relaxed. Several methods are used to deduce the mosaicity and dislocation density of GaN, showing that the edge type dislocations are the overwhelming majority.

关键词： GaN XRD dislocation epitaxial

Effect of Different Mulching Materials on Growth Parameters and Yield of Okra (Abelmoschus esculentus) Production in Minna, Nigeria

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Open Journal of forestry 2024年第3期14卷 197-213页

作者： Ebierin Akpoebidimiyen Otuaro John Jiya Musa Mohammed Musa Isah Abayomi Ibrahim Kuti Muhammad Yusuf Salihu department of Civil Engineering Faculty of Engineering Maritime University Okerenkoko Nigeria department of Agriculture and Bio{1. Engineering Federal University of Technology Minna Nigeria

During the 2022 growing season (August to November) at the Federal University of Technology, Minna School farm, Niger State, an experiment was conducted to investigate the influence of mulching on Okras growth, yield, and moisture content was examined across four distinct growth stages (initial, development, mid, and late) and at varying soil depths (0 - 30 cm and 30 - 60 cm). The study employed a randomised complete block design with four replications, encompassing control (T0), groundnut shells mulch (T1., black polythene mulch (T2), and white polythene mulch (T3) as treatments. The highest average Okra fresh pod yield, amounting to 23.4 t/ha, was achieved by implementing white plastic mulch, contrasting with the control treatment, which yielded the lowest at 22 t/ha. Notably, the control plots exhibited yield reductions of up to 32% compared to the plots employing white plastic mulching. The utilisation of mulch had a notable impact on the overall crop yield, with the superior quality evident in the treatment employing white plastic mulch (26 t/ha). The control treatment exhibited the lowest quality at 24.3 t/ha. Groundnut shell mulch influenced moisture conservation, but no significant variance was observed compared to the control plots. Therefore, the study suggests that polythene mulch may be the most suitable type to enhance the quality of okra production by conserving soil moisture. Among the biodegradable and non-biodegradable mulches used in this study, white polythene mulch was the most effective.

关键词： Crop Groundnut Shell Mulch Plastic Pod Soil

Preliminary Mo isotope data of Phanerozoic clastic sediments from the northern margin of the Yangtze block and its implication for paleoenvironmental conditions

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Chinese Science Bulletin 2009年第5期54卷 822-829页

作者： ZHOU Lian GAO Shan CHRIS Hawkesworth COREY Archer XIE ShuCheng State Key Laboratory of Geological Processes and Mineral resources China University of Geosciences Wuhan 430074 China department of Earth Sciences University of Bristol Bristol BS8 1R J U.K.

Mo isotopes along with Nd isotopes and other geochemical characteristics of the Phanerozoic clastic sediments from the northern margin of the Yangtze block were analyzed by MC-ICP-MS and some other techniques, spanning the period from Cambrian to Jurassic. The δ 98Mo values and εNd(t ) in these sedimets were observed to exhibit a large range of variation (?0.65‰―+1.87‰, ?1.46―?1..90, respec-tively). Specifically, the sample from Late Permian Maokou Formation has relatively positive values in both δ 98Mo and εNd(t ) (+0.97‰, ?1.46, respectively). These elevated values are proposed to relate to the input of a large quantity of H2S and HS- into the contemporaneous seawater by the volcanic eruption of the Emeishan mantle plume. Introduction of these sulfide gases would cause MoO42? to be transferred into MoS24?, favoring the preferential deposition of the heavy Mo isotope as MoS24? and thus leaving a positive Mo isotope value. The sample from Late Permian Changxing Formation has a significantly elevated δ 98Mo value of +1.87‰, in association with the relatively negative εNd(t ) (?1..90) and remain the relatively higher content of both TOC and total sulfur (TS) (1.52%, 2.02%, respectively). This infers the presence of the enhanced primary productivity and high organic burial during the Changxing pe-riod. The production of a huge quantity of HS? and H2S by the sulfate-reducing reaction led to the ex-istence of the elevated seawater δ 98Mo values during the Changxing period. The preliminary Phanero-zoic data reported here allow us to propose that the Mo isotope signature preserved in reductive sediments is related to the regional tectonic settings and the associated environmental conditions, and thus the measurement of δ 98Mo promotes our understanding on the evolution of the paleoenviron-mental event in the Earth history.

关键词：钼同位素古环境显生宙长江