• 제목/요약/키워드: Spider

검색결과 513건 처리시간 0.029초

거미(Nephila clavata L. Koch) 견사선 분비관에서의 큐티클 전구체 생성에 관한 연구 (Study on Production of Cuticle Precursor within Silk Gland Duct of the Spider, Nephila clavata L. Koch)

  • 문명진
    • Applied Microscopy
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    • 제25권3호
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    • pp.20-32
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    • 1995
  • Ultrastructural aspects on the production of the duct cuticle and formation of cuticular precursors within silk glands of the orb web spider, Nephila clavata L. Koch(Araneae: Araneidae), were studied using transmission electron microscope. Four kinds of silk glands(ampullate glands, tubuliform glands, flageliform glands, and aggregate glands), which connected with large spinning tubes(spigots) of the spinnerets, were examined and discussed in terms of cuticle precursor production. Inner cuticular intima which composed of three layers of cuticles-subcuticle, endocuticle and exocuticle- were commonly originated from duct epithelial cells surrounding the cuticle. The morphology and internal textures of each cuticle precursors were very diverse according to the types of silk glands. However several common features were observed. These cuticle precursors were first produced from the rough endoplasmic reticulum and next concentration was accomplished through the Golgi complex. After this step, cuticle precursors were released to the cuticle layer as a form of secretory granule by the mechanism of merocrine secretion commonly.

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한국산 애응애과 응애의 분류 및 동위효소에 관한 연구 (A Study on the Taxonomy and lsozymes of False Spider Mites (Acarina: Temwpalpidae) from Korea)

  • 이정상
    • 한국동물학회지
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    • 제31권2호
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    • pp.147-155
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    • 1988
  • 1986년 12월부터 87년 11월까지 채집된 애응애과 응애를 분류학적으로 정리한 바 Brevipalpus속의 B.californicus와 B.ovovatus 2종과 다음의 한국4미기록종을 얻었다: Aegyptobia nothus Pritchard and Baker,Pentomerismus taxi Hailer, P. oregonensis McGregor,Brevipalpus lewisi McGregor. 따라서, 한국산 애응애과 응애는 Tenuipalpus속의 T.zhizhilashiliae(감나무애응애)를 포함하여 4속 7종이 보고되는 셈이다. 또한 P. oregonensis,B.californicus,B.ovovatus 및 B.lewisi에 대하여 polyacrylamide slab gel electrophoresis로 esterase와 alkaline phosphatase pattern을 조사한 바 esterase는 band수와 이동도에서 종과 속간에 뚜렷한 차이를 보였다.

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Sex Ratio and Approximate Date of Fertilization of the Subsocial Spider Amaurobius ferox Walckenaer (Araneae: Amaurobiidae)

  • Kim, Kil-Won;Choe, Jae-Chun
    • Journal of Ecology and Environment
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    • 제30권3호
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    • pp.277-280
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    • 2007
  • Social spiders consistently show highly female-biased sex ratios. However, the sex ratio of subsocial spiders, which have been suggested as an intermediate stage of the evolutionary pathway towards permanent sociality, is generally unknown. We investigated the sex ratio and approximate date of fertilization of the subsocial spider, Amaurobius ferox Walckenaer (Araneae: Amaurobiidae). Investigation over 2 years revealed that sex ratio of A. ferox was consistent across years and averaged 0.49. By early May $(1^{st}{\sim}10^{th})$, 66.6% of female A. ferox observed in the field had already been inseminated, and by late May $(21^{st}{\sim}31^{th})$, 95.4% of females had been inseminated. This result suggests that A. ferox need a long time or cold temperatures to prepare them for reproduction after the developmental attainment of the adult stage.

거미(agelena Limbata Thorell) 독 분비기관의 신경근육간 연접장치의 미세구조적 분석 (Fine Structural Analysis of the Neuromuscular Junction in the Venomous Organ of the Spider, Agelena limbata (Araneae: Aselenidae))

  • 문명진
    • 한국동물학회지
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    • 제39권2호
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    • pp.223-230
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    • 1996
  • Fine structure of the neuromuscular junction in the venomous organ of the spider, Agelena li'mbutq, was studied using high magnification electron microscope. The motor nerve endings at neuromuscular contact area composed of neurons and neuroslial cells were located between musculature and extracellular sheath of the venom gBand. At the synaptic contact between a motor axon and a muscle fiber in the musculature, spherical synaptic vesicles were prominent in the nerve terminal. The sarcoplasm beneath the neuromuscular synapse has a granular appearance and lacks mvofilaments. And the main axon gives off a branch between the muscle fibers. The synaptic regions of this organ are located close to the myofilaments unlike to other chelicerate classes. Moreover the postsvnaptic complex of vesicles and membrane invasinations present in other synaptic legions are absent from these legions in this venomous organ.

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검은과부거미 (Latrodectus mactans) 피부 색소의 미세구조에 관한 연구 (Fine Structure of the Cutaneous Pigments in the Black Widow Spider, Latrodectus mactans)

  • 문명진
    • Applied Microscopy
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    • 제28권4호
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    • pp.503-512
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    • 1998
  • Fine structure of the cutaneous pigments in the black widow spider, Latrodectus mactans are studied with light and electron microscopes. The cutaneous pigments are only observed in epidermal layer just beneath the cuticle. These pigments are compactly distributed around the spinnerets which located at caudal area of the abdomen. According to the fine structural characteristics of the pigment granules, two main types of guanine pigment granules-carotenoid vesicles and reflecting platelets - are observed in the cytoplasm of the epidermal cells. Morphological features of these pigment granules are characterized as the electron dense carotenoid vesicles and the electron lucent reflecting platelets. Marginal electron density of the carotenoid vesicle is different from that of internal region, whereas the reflecting platelets have laminated crystalline granules. Typiral structures of these pigment granules are very similar to those of invertebrate's chromatophores, especially erythrophores and iridophores. Moreover differentiation of these pigment granules are also originated from the small vesicles of Golgi complexes similarly to those of cutaneous chromatophores.

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한국산 응애과 (거미속 : 진드기목) 의 분류학적 연구 (Taxonomic Study on Spider Mites (Tetranychidae ; Acarina ) of Korea)

  • 이원구;이병훈;김영진
    • Animal Systematics, Evolution and Diversity
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    • 제2권2호
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    • pp.13-26
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    • 1986
  • 다음과 같은 7종 응애과 (Family Tetranychidae ) 응애에 대하여 형태학적 특징, 표피의 주름, 핵형들을 비교함으로써 분류학적 검토를 실시하였다. 본 연구에 사용된 재료는 1985년 10월부터 1986년 6월 사이에 전북 전주에서 채집되고 사육된 것들이었다. Subfamily Bryobiinae 클러버등에 아과 :Bryobia praetiosa 클로버응애, Petrobia lantens 밀응애(신칭): Subfamily Tetranychinae 응애 아과, Panonychus citri 귤응애, P. ulmi 사과응애, Tetranychus vienensis 나무응애, T. urticae 점박이 응애. T.kanzawai 차응애(신칭), 그 중 밀응애와 차응애는 한국 미기록종이다.미기록종이다.

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First Record of Indo-West Pacific Spider Crab, Naxioides robillardi (Decapoda: Epialtidae) from Korean Waters

  • Lee, Sang-Hui;Jung, Jibom;Park, Taeseo
    • Animal Systematics, Evolution and Diversity
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    • 제36권4호
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    • pp.400-407
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    • 2020
  • An epialtid spider crab, Naxioides robillardi (Miers, 1882), is known as widely distributed in Indo-West Pacific region include Japanese waters. Four specimens of epialtid crabs were collected from adjacent waters of Jejudo Island and identified as N. robillardi. This species can be grouped into two forms such as N. robillardi form typical and N. robillardi form mammillata according to morphological features of carapace, gastric spine, and chela. Morphological characters of all Korean specimens well agree with the form mammillata in general. In this paper, morphological diagnosis and illustrations of newly collected N. robillardi are provided. DNA barcode sequence of COI region is also determined for the first time.

Re-description of Sea Spider Cilunculus armatus (Pycnogonida: Ammotheidae) from Korea

  • Lee, Damin;Park, Jin-ho;Kim, Won
    • Animal Systematics, Evolution and Diversity
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    • 제36권4호
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    • pp.330-335
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    • 2020
  • The sea spider genus Cilunculus Loman, 1908 comprises 33 species having short chelifores, separate lateral processes, and a hood structure on the cephalic segment. A pycnogonid species, Cilunculus armatus(Böhm, 1879), was collected from Baekdo Island and Chujado Island, Korea. This species is characterized by having a hood structure on the cephalic segment, separate lateral processes, a low ocular tubercle without eyes, and 3-segmented chelifores. In the examined material, chela shape, arrangement of compound spines on strigilis, and number of heel spines at propodus were different from the previous literatures. Here, we examined C. armatus collected in Korean waters and provided illustrations and pictures in detail.

Design and Analysis of Spider Bionic Flow Field for Proton Exchange Membrane Fuel Cell

  • Jian Yao;Fayi Ya;Xuejian Pei
    • Journal of Electrochemical Science and Technology
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    • 제14권1호
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    • pp.38-50
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    • 2023
  • Proton exchange membrane fuel cell (PEMFC) is a portable and clean power generation device. The structural arrangement of the flow field has a significant influence on the delivery efficiency of PEMFC. In this article, a new bionic flow channel is designed based on the inspiration of a spider shape. The branch channel width and branch corner are studied as the focus, and its simulation is carried out by the method of computational fluid dynamics (CFD). The results show that when channel width/rib width and corner of the branch are 1.5 and 130° , respectively, it is the best numerical combination and the cell comprehensive performance is excellent. The final model using this numerical combination is compared with the traditional flow channel model to verify the advancement of this scheme.