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  1. Article ; Online: A New Fern-like Plant Xinhangia spina Gen. et sp. Nov. from the Upper Devonian of China

    Jiang-Nan Yang / De-Ming Wang

    Biology, Vol 11, Iss 1568, p

    2022  Volume 1568

    Abstract: Palaeozoic fern-like plants show great diversity in their morphology and/or anatomy. Within this group, a novel taxon, Xinhangia spina gen. et sp. nov., is now reported from the Upper Devonian (Famennian) Wutong Formation of Anhui Province, China. The ... ...

    Abstract Palaeozoic fern-like plants show great diversity in their morphology and/or anatomy. Within this group, a novel taxon, Xinhangia spina gen. et sp. nov., is now reported from the Upper Devonian (Famennian) Wutong Formation of Anhui Province, China. The primary and secondary branches are borne alternately and sometimes in a triseriate pattern. Spines are evident on the main axes or stems and on the primary branches. Vegetative ultimate appendages with recurved tips are alternate, usually dichotomous 1–2 times, and sometimes as an aphlebia located at the base of primary or secondary branches. Fertile ultimate appendages are alternate, usually dichotomous 1–2 times, and terminate in elongated and paired sporangia. The stele has a clepsydroid-like primary xylem with each end bearing a protoxylem strand. The secondary xylem surrounding the primary xylem illustrates uniseriate rays. With rare divisions in both the vegetative and fertile ultimate appendages, Xinhangia represents a morphologically primitive plant. It is of uncertain affinity at the class or order level. The stelar architecture suggests that the clepsydroid stele may not be emphasized in discussing the relationship among fern-like plants such as rhacophytaleans.
    Keywords fern-like plants ; triseriate branching ; Late Devonian ; stele ; Xinhangia ; Wutong Formation ; Biology (General) ; QH301-705.5
    Subject code 580
    Language English
    Publishing date 2022-10-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: The morphometric of lycopsid sporophylls and the evaluation of their dispersal potential

    Yi Zhou / De-Ming Wang / Le Liu / Pu Huang

    BMC Ecology and Evolution, Vol 21, Iss 1, Pp 1-

    an example from the Upper Devonian of Zhejiang Province, China

    2021  Volume 13

    Abstract: Abstract Background Previous studies have discussed the special structural adaptations of Late Palaeozoic lycopsids, for example, the dispersal potential of reproductive organs. Based on materials from the Upper Devonian Wutong Formation in Changxing ... ...

    Abstract Abstract Background Previous studies have discussed the special structural adaptations of Late Palaeozoic lycopsids, for example, the dispersal potential of reproductive organs. Based on materials from the Upper Devonian Wutong Formation in Changxing County, Zhejiang Province, China, we now analyze the morphometric and perform some calculation to evaluate the dispersal of sporophyll units of lycopsids. Results The fossil sporophyll units are divided into two types in view of obvious difference in shape and we name two new (form) species for them. We also analyze the falling process and give the calculation method of dispersal distance. Conclusions The fossil sporophyll units show relatively poor potential of wind dispersal compared with modern samaras, and show potential adaptation to the turbulent environment.
    Keywords Lycopsids ; Late Devonian ; Dispersal ; Reynolds number ; Ecology ; QH540-549.5 ; Evolution ; QH359-425
    Subject code 580
    Language English
    Publishing date 2021-11-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Re-study of Guangdedendron micrum from the Late Devonian Xinhang forest

    Xue Gao / Le Liu / Min Qin / Yi Zhou / Lei Mao / De-Ming Wang

    BMC Ecology and Evolution, Vol 22, Iss 1, Pp 1-

    2022  Volume 16

    Abstract: Abstract Background Guangdedendron micrum is the Late Devonian tree lycopsid that made up Xinhang fossil forest in Anhui, China, showing the earliest stigmarian rooting system. Based on new specimens of this lycopsid, the roots bearing rootlets, terminal ...

    Abstract Abstract Background Guangdedendron micrum is the Late Devonian tree lycopsid that made up Xinhang fossil forest in Anhui, China, showing the earliest stigmarian rooting system. Based on new specimens of this lycopsid, the roots bearing rootlets, terminal parts of stems, vegetative leaves and monosporangiate strobili containing megaspores are researched in detail. Results The roots with four robust rhizomorphs are largely expanded and approach the size of those of the Late Carboniferous giant tree lycopsids in swampy forests. The rootlets along rhizomorphic axis leave oval to circular scars after abscission. Narrow-fusiform leaf cushions display a leaf scar, vascular bundle and ligule pit. Cylindrical megasporangiate strobili are borne singly, in pairs, or occasionally once-dichotomized. Of each megasporophyll, the pedicel consists of a keel and possibly undeveloped alations, and the long-triangular lamina presents a heel. Megasporangium is sessile and contains multiple Lagenicula megaspores with distinct spines and a large gula. Conclusions G. micrum displays large terminal monosporangiate strobili probably adapted to turbulent condition, and its megasporophylls together with multiple Lagenicula-type megaspores hint a possible primitive evolutionary status. These characteristics provide new insights into the evolution of fertile traits of early lycopsids.
    Keywords Guangdedendron micrum ; Lagenicula ; Tree lycopsids ; Xinhang forest ; Late Devonian ; Ecology ; QH540-549.5 ; Evolution ; QH359-425
    Subject code 580
    Language English
    Publishing date 2022-05-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Piezoelectric Effect and Ignition Characteristics of Coal Mine Gob Roof Collapse

    Ya-nan Wang / De-ming Wang / Hai-hui Xin / Yun-fei Zhu / Zhenhai Hou / Wei Zhang / Min Li

    ACS Omega, Vol 6, Iss 43, Pp 28936-

    2021  Volume 28945

    Keywords Chemistry ; QD1-999
    Language English
    Publishing date 2021-10-01T00:00:00Z
    Publisher American Chemical Society
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Pollen Organ Telangiopsis sp. of Late Devonian Seed Plant and Associated Vegetative Frond.

    De-Ming Wang / Mei-Cen Meng / Yun Guo

    PLoS ONE, Vol 11, Iss 1, p e

    2016  Volume 0147984

    Abstract: Pollen organ Telangiopsis sp., associated with but not attached to vegetative fronds, has been collected from the Upper Devonian (Famennian) Wutong Formation, Dongzhi County, Anhui Province, China. Fertile axes with terminal pollen organs are dichotomous ...

    Abstract Pollen organ Telangiopsis sp., associated with but not attached to vegetative fronds, has been collected from the Upper Devonian (Famennian) Wutong Formation, Dongzhi County, Anhui Province, China. Fertile axes with terminal pollen organs are dichotomous for 2-4 times and may be proximally attached by fragmentary pinnules. Pollen organs are synangiate and borne on the top of a short stalk. Synangia are radial in symmetry and each consists of 4-8 elongate microsporangia fused at base. Microsporangia have a longitudinal dehiscence line and show a tapered apex. The associated stem is spiny and bears a vegetative frond which bifurcates once at the basalmost part. Frond rachises possess one order of pinna arranged alternately. Pinnules are borne alternately, planate, highly dissected, and equally dichotomous for 2-3 times. Comparisons among Late Devonian seed plants recognize several branching patterns in the fertile fronds/axes bearing terminal pollen organs. Telangiopsis sp. reinforces that the Late Devonian pollen organs are synangiate usually with basally fused microsporangia. It is suggested that the evolutionary divergence of radial and bilateral symmetries of pollen organs may have occurred in the Famennian, when the earliest seed plants evolved planate and sometimes laminate pinnules.
    Keywords Medicine ; R ; Science ; Q
    Subject code 580
    Language English
    Publishing date 2016-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article: New technology and practice of dust pollution control with foam jet in underground mines

    Lu, Xin-Xiao / Hong-Qing Zhu / De-Ming Wang

    Journal of environmental science and health. 2019 Jan. 2, v. 54, no. 1

    2019  

    Abstract: Foam is used as an efficient means of dust suppression in underground coal mines. The poor performance of conventional adding device of foaming agent restricts its wide application. The objective of this study is to propose and investigate a new parallel ...

    Abstract Foam is used as an efficient means of dust suppression in underground coal mines. The poor performance of conventional adding device of foaming agent restricts its wide application. The objective of this study is to propose and investigate a new parallel jet adding device (PJAD). Experimental results show that PJAD requires a greater water flow to produce negative pressure than the single stage jet adding device (SJAD) and is harder to generate cavitation. PJAD consumes a less pressure loss than SJAD and realizes any adding proportion below 1%, which is especially suitable for precision addition of foaming agent. A foaming system used for dust suppression is put forward with PJAD adding foaming agent. Field application indicates that foam achieves a far better dust suppression effect than the roadheader water spraying, and the foam cost is significantly reduced due to the low adding proportion of foaming agent. The marked dust suppression effect makes us believe that the proposed PJAD will greatly promote the large-scale application of foam technology used for dust suppression in underground coal mines.
    Keywords coal ; dust ; foams ; pollution control ; spraying ; water flow
    Language English
    Dates of publication 2019-0102
    Size p. 39-47.
    Publishing place Taylor & Francis
    Document type Article
    ZDB-ID 196584-0
    ISSN 1532-4117 ; 0360-1226 ; 1077-1204 ; 1093-4529
    ISSN (online) 1532-4117
    ISSN 0360-1226 ; 1077-1204 ; 1093-4529
    DOI 10.1080/10934529.2018.1507220
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: Vegetative characters, growth habit and microsporangiate strobilus of lycopsid Minostrobus chaohuensis.

    Mei-Cen Meng / De-Ming Wang / Jian-Xin Yao

    PLoS ONE, Vol 10, Iss 3, p e

    2015  Volume 0122167

    Abstract: Late Devonian Minostrobus chaohuensis is one of the earliest monosporangiate-strobilate isoetaleans. Based on new material of this plant, the vegetative axis and microsporangiate strobilus are studied in detail, and the whole plant knowledge is ... ...

    Abstract Late Devonian Minostrobus chaohuensis is one of the earliest monosporangiate-strobilate isoetaleans. Based on new material of this plant, the vegetative axis and microsporangiate strobilus are studied in detail, and the whole plant knowledge is summarized. The vegetative axis is isotomously branched. The stem is up to 55 mm in diameter with helically arranged leaf cushions. Stems and thick branches bear long fusiform leaf cushions and interareas with vertical linear ornamentations. A ligule pit, oblanceolate leaf scar, and vascular bundle scar appear on the leaf cushion. Distal axes have persistent lanceolate leaves and rhombic leaf bases. The microsporangiate strobilus is cylindrical in shape, possesses sporophyll with alate pedicel and long triangular lamina, uniseriate sporangial wall, subarchesporial pad inside the sporangium, and microspore with cingulum. Based on comparisons with other isoetaleans, the usage of the terms "leaf cushion" and "leaf base" is discussed, and Minostrobus chaohuensis is considered as a tree-like lycopsid. It suggests that arborescent isoetaleans with monosporangiate strobili had appeared and diversified in the Late Devonian. The multi-dichotomous branching system of Minostrobus provides new data on the evolution of growth architecture in rhizomorphic lycopsids.
    Keywords Medicine ; R ; Science ; Q
    Subject code 580
    Language English
    Publishing date 2015-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Pyrolysis Characteristics of Jet Coal and Oxidation of Residues in Zhundong Coalfield Fires

    Haihui Xin / Jianguo Sun / Leilei Zhang / Wenjiang Tian / Banghao Zhou / Zuo Tang / Xu-yao Qi / Cuicui Di / Xiaoxing Zhong / De-ming Wang

    ACS Omega, Vol 6, Iss 32, Pp 20846-

    2021  Volume 20854

    Keywords Chemistry ; QD1-999
    Language English
    Publishing date 2021-08-01T00:00:00Z
    Publisher American Chemical Society
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article: Growth architecture and microsporangiate strobilus of Sublepidodendron grabaui (Lycopsida) from the Late Devonian of South China

    Meng, Mei-Cen / De-Ming Wang / Jian-Xin Yao / Le Liu

    Review of palaeobotany and palynology. 2016 Jan., v. 224

    2016  

    Abstract: The arborescent lycopsid Sublepidodendron grabaui was widely distributed in the Late Devonian of South China. Its morphology and anatomy have been described, but the microsporangiate strobilus remains unclear. New material collected from the Guanshan ... ...

    Abstract The arborescent lycopsid Sublepidodendron grabaui was widely distributed in the Late Devonian of South China. Its morphology and anatomy have been described, but the microsporangiate strobilus remains unclear. New material collected from the Guanshan Member of the Wutong Formation in Zhejiang Province allowed us to provide more details of this plant. The pseudomonopodial axis without secondary xylem bears medullated stele and branch traces arranged in irregular helices. The lateral branch possesses solid exarch primary xylem. This pseudomonopodial branching system possibly represents the crown or cauline lateral branch. The microsporangiate strobilus contains microspores belonging to the Lycospora granulata Group. The monosporangiate nature of S. grabaui is confirmed, and the classification of Sublepidodendraceae into the suborder Dichostrobiles is supported. The L. granulata Group microspores are suggested to occur not only in bisporangiate strobili but also in monosporangiate strobili.
    Keywords branching ; Devonian period ; microspores ; secondary xylem ; stele ; China
    Language English
    Dates of publication 2016-01
    Size p. 83-93.
    Publishing place Elsevier B.V.
    Document type Article
    ISSN 0034-6667
    DOI 10.1016/j.revpalbo.2015.06.002
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Numerical Study on Infrared Optical Property of Diffuse Coal Particles in Mine Fully Mechanized Working Combined with CFD Method

    Wen-Zheng Wang / Yan-Ming Wang / Guo-Qing Shi / De-Ming Wang

    Mathematical Problems in Engineering, Vol

    2015  Volume 2015

    Keywords Mathematics ; QA1-939 ; Science ; Q ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Technology ; T
    Language English
    Publishing date 2015-01-01T00:00:00Z
    Publisher Hindawi Publishing Corporation
    Document type Article ; Online
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