• Title/Summary/Keyword: Dry film

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Effects of NH3 on the Growth of Oxide Film by Infrared-CVD Method (적외선 CVD 방법을 이용한 산화막 성장에 $NH_3$가 미치는 영향)

  • Lee, Chul-Seung;Chung, Kwan-Soo;Kim, Chul-Ju
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.25 no.11
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    • pp.1329-1334
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    • 1988
  • A new method was developed for growing oxidation film by thermal reaction of $NH_3$ and $O_2$. The growth rate increased with the increase of partial pressure of $NH_3$. Optical transparency of the growth film was 12% at the wave number 1100 $cm^{-1}$ compared with 17% by thermal dry oxidation method, and the quality was much better. In C-V characteristic curve, $Q_{OX}$ was almost equal to $Q_{SS}$ and no hysteresis phenomena was observed. n-MOS transistors fabricated with this new method showed $I_D$-$V_{DS}$ characteristics better than thermal dry oxidation method.

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Microvascular autologous submandibular gland transplantation in severe cases of keratoconjunctivitis sicca

  • Su, Jia-Zeng;Cai, Zhi-Gang;Yu, Guang-Yan
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.37
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    • pp.5.1-5.4
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    • 2015
  • Dry eye syndrome is a relatively common disease of the tears and ocular surfaces that results in discomfort, visual disturbance, and tear film instability with possible damage to the ocular surfaces. Microvascular submandibular gland (SMG) transfer offers a surgical alternative for a permanent autologous substitution of tears using the basal secretion of a transplanted SMG. Long-term follow-up reveals that this technique is a lasting and effective solution for patients with severe dry eye syndrome. The uncomfortable symptoms were relieved, and the frequency of use of pharmaceutical tear substitutes was reduced. Objective examination showed significant improvement in tear film and some features of ocular surface such as breakup time of tear film and corneal staining. Patients may suffer from obstruction of Wharton's duct or epiphora after surgery. Activation of secretion-related receptors could improve the early hypofunction of the denervated SMG and prevent the duct obstruction. Reduction surgery, partial SMG transplantation, uses of atropine gel or Botulinum toxin A could be the choices of treatment for epiphora.

Effects of Mulching Treatments on Fall Cultivation of Potato (피복처리가 감자추작에 미치는 영향)

  • Jung-Hyun Choi;Jae-Young Cho
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.23 no.2
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    • pp.126-132
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    • 1978
  • To examine the effects of P.E. film and rice straw mulching on fall grown potato(Shimabara cultivar) in the middle region of Korea, sprouted seed tuber pieces were transplanted with six kinds of mulching treatments on 24th July and harvested on 25th October. P.E. film mulching from transplanting resulted the perfect rot of transplanted seed pieces due to the excessive high soil temperature (noon soil temperature of about 4$0^{\circ}C$ continued until the middle of August). P.E. film mulching from 15th September to harvest increased the marketable tuber yields by 35% due to the raising of soil temperature by 1-3$^{\circ}C$ and maintaining of available soil moisture in dry season. Rice straw (whole or cut in 10cm length) mulching lowered the soil temperature in hot season and raised it in cool season and maintained available soil moisture in dry season. Therefore better emergence, growth and yields were induced. Effects of whole straw, whole growing season and thicker mulching were greater than cut straw, half growing season and thinner mulching. 6cm mulching of whole or cut straw during whole growing season resulted the increasing of marketable tuber yields by 56 or 48%.

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Influence of PE Film House culture with Non Heating on Growth and Yield of Forage Rape (무가온 Vinyl House 재배가 사초유채의 생산특성과 수량에 미치는 영향)

  • 안계수;권병선;정동희;김상곤
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.16 no.3
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    • pp.215-218
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    • 1996
  • This study examines the possibility of early production of forage rape (cv. Akela and Velox) in the period of wintering. Bolting date was Feb. 2 to Feb. 9 in PE film house culture by non-heating and Mar. 3 to Mar. 12 in open field culture. And flowering date was Feb. 24 to Mar. 3 in PE film house culture by non-heating, so it was 30~50 days faster than the open field culture of Apr. 17 to Apr. 22. Fresh matter yield was 8, 356~4, 887 kg/10a in PE film house culture by non-heating, so it was 1, 431~1, 603 kg/10a yield increase than in the open field culture of 7, 253~7, 456 kg/10a Dry matter yield was 953~963 kg/10a in PE film house culture by non-heating, so it was 71~284 kg/10a yield increase than in the open field culture of 669~892 kg/10a.

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