• 제목/요약/키워드: BATS

검색결과 128건 처리시간 0.03초

박쥐의 동면온도 범위에서 작용하는 비행근의 수축기능 (Contractile Function of a Flight Muscle Over the Range of Hibernation Temperature in Bats)

  • 조연미;오영근;정노팔;신형철;최인호
    • 한국동물학회지
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    • 제39권1호
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    • pp.98-105
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    • 1996

  • 온도 적응에 관한 연구들을 보면 생리기능 상의 최적온도가 생물 개체의 일상 체온에 잘 일치한다는 내용을 보여주고 있다. 동면 중의 박쥐들은 월동장소의 주위온도(9$^{\circ}$-12$^{\circ}$C)보다 약간 높은 범위에서 체온을 유지하는 것으로 관찰되고 있다. 본 연구에서는 이 동물들의 근육이 동면체온 범위에서 최대의 수축기능을 발휘하도록 조정되리라는 가설을 설정하고 이를 실험하기 위해 한국큰과박쥐 Rhinolophus ferrumequlnum korai (n = 5)의 이두박근 수축기능을 $10^{\circ}$-35$^{\circ}$C범위의 근육온도에서 실험하였다. 상대적 강축힘(최대 강축힘에 대한 퍼세트 값)은 이들의 동ㅁㄴ체온과 일치하는 $10^{\circ}$-15$^{\circ}$C 범위에서 가장 높았다. 한편 비동면성 동물은 37$^{\circ}$C의 범주에서 체온을 유지하며 강축힘에 대해 30$^{\circ}$-40$^{\circ}$C 범위의 최적온도를 보이는데 이를 종합해 볼 때 본 연구의 결과는 박쥐의 비행근 기능이 계절적인 체온변화에 준하여 조정되고 있음을 보여준다고 하겠다. 박쥐의 근육이 낮은 체온에서도 강한힘을 발생한다는 본 실험 결과는 동면동안 이따금 수분섭취나 배설을 위해 날아야하는 점 또는 천적으로부터 도피할 수 있어야 하는 점을 고려할 때 적응의 한 예라고 사료된다.

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Eimeria pipistrellus n. sp. from Pipistrellus kuhlii (Chiroptera: Vespertilionidae) in Saudi Arabia

  • Alyousif, Mohamed-Saleh;Mohamed, Al-Dakhil;Yaser, Al-Shawa
    • Parasites, Hosts and Diseases
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    • 제37권1호
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    • pp.1-4
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    • 1999

  • Fecal samples from 12 Pipistrellus kuhlii captured at Shagrah, Saudi Arabia, were examined for coccidia and three (25%) found to harbor a undescribed eimerian, herein described as Eimeria pipistrellus n. sp. Sporulated oocysts were sub spherical. $24.8{\times}23.2{\;}(22-27{\times}20-25){\;}\mu\textrm{m}$, with a bilayered and smooth wall. The micropyle was absent, but a large oocyst residuum and a single polar granule were present. Sporocysts were ovoid, 11.6{\times}8.3 (10.5-13{\times}7.5-9) Jim, with a prominent Stieda body, but without a substiedal body; sporozoites lay head to tail in sporocysts and contained one large posterior refractile body. Eimeria pipistrellus n. sp. is the 3rd species of the genus Eimeria found from bats of the genus Pipistrellus.

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COVID-19: An overview of current scenario

  • Malik, Jonaid Ahmad;Maqbool, Mudasir
    • 셀메드
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    • 제10권3호
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    • pp.21.1-21.8
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    • 2020

  • Over a span of few decades, the world has seen the emergence of new viruses that have posed serious problems to global health .COVID-19 is a major pathogenic threat to the modern world that primarily shoots the respiratory system of human beings. Wuhan which is the capital city of Hubei, China was the first place in the world where first cases of COVID-19 emerged and the scores of cases significantly increased at an immense rate leading to city isolation and establishment of new specially designed hospitals. SARS-CoV had emerged from bats in china (2002) and MERS-CoV from camels transmitted via bats in Middle East (2012) where the previous versions of COVID-19 took place. Infections with SARS-CoV-2 are now widespread, like Nuclear Chain Reaction (NRC). In this review we will discuss the COVID-19 origin, transmission, incubation, diagnosis and therapies available at the present scenario.

  • https://doi.org/10.5667/CellMed.2020.0021 인용 PDF KSCI

한국산 관박쥐 (Rhinolophus ferrumequinum korai) 정세관상피의 주기적 변화 (Cyclic Changes of the Epithelium of Seminiferous Tubule in the H rseshoe Bat (Rhinolophus ferrumequinum korai))

  • 오영근
    • Applied Microscopy
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    • 제9권1호
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    • pp.21-34
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    • 1979

  • The cyclic changes of the epithelium of seminiferous tubule in the Korean greater horseshoe bat (Rhinolophus ferrumequinum korai) were investigated by means of the light and electron microscopic observations and the following results were obtained. 1) The spermatogenic function of the horseshoe bats captured in September was moderate but considerable amount of the ultrastructural findings were obtained in both the spermatocytogenic and the spermiogenic phases. 2) The spermatogenic function of the horseshoe bats captured in December was depressed representing a resting status. 3) The light and electron microscopic findings suggest that the epithelium of seminiferous tubule varies cyclically, which is closely related to their peculiar way of reproductive habit during hibernation.

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