• Title/Summary/Keyword: Saline irrigation

Search Result 122, Processing Time 0.024 seconds

Artocarpus chaplasha: Establishment and Initial Growth Performance at Elevated Temperature and Saline Stresses

  • Rahman, Md. Siddiqur;Al-Amin, M.;Akter, Salena
    • Journal of Forest and Environmental Science
    • /
    • v.28 no.1
    • /
    • pp.12-18
    • /
    • 2012
  • Like any other natural resources, forest flora may experience the extreme threat of elevated temperature and saline water submergence at different stages of their lives i.e. from germination to maturity due to climate change effects. The overall aim of the study was to measure the effect of higher temperatures along with saline water irrigation on survival and initial growth during seedling stage of Artocarpus chapalasha. The experiment was conducted in temperature- humidity-photoperiod regulated plant growth chamber during stipulated period to measure the growth performance of randomly selected seedlings. Within three different elevated temperatures viz. $30^{\circ}C$, $32^{\circ}C$ and $34^{\circ}C$, the seedlings were given three different saline conditions such as 0.5 g/L, 1.5 g/L and 2.5 g/L NaCl concentrations. Results found from the experiment was that, seedlings of Artocarpus chaplasha reared at different temperatures and saline water treatments showed stunted growth than reared at existing outdoor temperature ($26.31^{\circ}C$) irrigated with regular fresh water. Seedling growth at three different parameters such as height, collar diameter and number of leaves showed that with increasing temperature individuals respond negatively to increasing saline condition. The seedling's growth occurred at every day in height, collar diameter and leaf. However, growth rate reduced later during the observation. The combined effect of high salinity and higher elevated temperature results in seedling mortality. Therefore, Artocarpus chaplasha may not thrive at higher temperature and salinity intrusion at its early growing period in plantation and natural forest areas.

Biological Improvement of Reclaimed Tidal Land (I) Desalination Effects of Saline Soil by the Growth of certain Halophytes (해안간척지 토양의 생물학적 토성개량에 관한 연구 (제1보) 수종 염생식물에 의한 간 탁지토양의 제염효과에 대하여)

  • 홍순우
    • Journal of Plant Biology
    • /
    • v.12 no.1
    • /
    • pp.7-14
    • /
    • 1969
  • Korea has a lots of margin for security of farm land from her coastal region. The area of saline soil may be reached about 10% of present farm land if the reclamation works are finished. This paper was conducted as a part of studying the possibilities of desalination of saline soil through the experiment of some halophytes. The halophytes in this works were Salicornia herbacea L., Suaeda glauca Bunge, chenopodium acuminatum Willd, and Scirpus triquerter L. Of the above halophytes, Salicornia was proved the most effective plant for desalination of saline soil referring to the following results; 1) The seasonal uptake of chloride by Salicornia was the highest of all. However, the general tendencies of all plants showed a decrease on August. 2) Salinity of soil showed the lowest value on the site where Salicornia was grwon densely. Comparing the other sites grouped by age of saline soil with the above site, the salinity of rice-paddy (10 years after reclamation) is similar to those of the site wehre Salicornia were as well as the 50 cm below the surface soil. 3) The maximum water holding capacity of surface soil appeared in the site of Salicornia, but in 50 cm below the surface, the maximum water holding capacity are almost on equat terms having no connection with the age of saline soil. Soil pH, other chemical compositions such as organic matter, magnesium, potassium, phosphorous, and nitrate were determined to elucidate the relationship between the changes of soil properties and chemical uptakes by certain halophytes. It is assumed that the above chemical compositions are frequently affected by the factors such as coastal circulation of salts, exchangeable base, microbial growth, climatic conditions, and irrigation of water.

  • PDF

Attenuation of Renal Ischemia-Reperfusion (I/R) Injury by Ascorbic Acid in the Canine Nephrotomy (개의 신장에 있어서 Ascorbic Acid에 의한 허혈/재관류 손상의 감소에 관한 연구)

  • Kim, Jong-Man;Lee, Jae-Yeon;Jeong, Seong-Mok;Park, Chang-Sik;Kim, Myung-Cheol
    • Journal of Veterinary Clinics
    • /
    • v.27 no.5
    • /
    • pp.553-558
    • /
    • 2010
  • The purpose of this study was to investigate the effects of premedicated ascorbic acid and hepa-saline irrigation/aspiration on attenuation of ischemia-reperfusion (I/R) injury and recovery of renal function in canine nephrotomy model. In the canine model, nine mixed dogs were subjected to renal nephrotomy with premedicated ascorbic acid and hepa-saline irrigation-aspiration (treatment group 2), and only hepa-saline irrigation-aspiration (treatment group 1). The level of renal function and antioxidant enzymes after nephrotomy were measured. And the expression pattern of TNF-${\alpha}$ and INF-${\gamma}$ was examined in the renal tissue at $7^{th}$ day after nephrotomy. BUN and creatinine levels significantly decreased in the treatment group 1 and 2 compared to that of control group at the $3^{rd}$, 5th and $7^{th}$ day after reperfusion (p < 0.05). And, there was significant difference between treatment group 1 and 2 at the $3^{rd}$ day after reperfusion (p < 0.05). The activities of antioxidant enzymes in plasma was significantly increased in the treatment group 1 and 2 compared to that of control group at the $3^{rd}$, $5^{th}$ and $7^{th}$ day after reperfusion (p < 0.05). And, there was significant difference between treatment group 1 and 2 at the $3^{rd}$ day after reperfusion (p < 0.05). TNF-${\alpha}$ was decreased and INF-${\gamma}$ was increased in treatment groups. The result of this study suggested that irrigation-aspiration has effects on attenuation of renal ischemia-reperfusion injury, and the exogenous ascorbic acid has a role in the attenuation of renal ischemia-reperfusion injury and recovery of renal function in canine nephrotomy model.

A STUDY ON THE CLEANSING EFFECT OF GLYOXIDE ON THE DENTINAL WALLS OF ROOT CANAL (Glyoxide의 근관정화효과에 관한 연구)

  • Lim, Sung-Sam
    • Restorative Dentistry and Endodontics
    • /
    • v.14 no.2
    • /
    • pp.103-110
    • /
    • 1989
  • The purpose of this study was to evaluate the cleansing effect of Glyoxide on the dentinal walls of the root canal. Fourty teeth were divided into four groups and the canals in each group were individually enlarged with K-file by step-back technic and irrigated with one of four irrigants. The four used irrigants were Glyoxide (Marion lab. U.S.A.) in combination with 3.5% sodium hypochlorite, 3.5% sodium hypochlorite, 3.5% sodium hypochlorite in combination with 3% hydrogen peroxide and normal saline solution. All the irrigants were used in conjunction with instrumentation as they would be during clinical conditions. After final irrigation, the canals were dried with paper points and the teeth were split longitudinally. The cleaness of canal walls according to the size and the level of canals were evaluated under steroscope by t analysed statistically The results were as follows. 1. The use of 3.5% sodium hyphochlorite in combination with 3.0% hydrogen peroxide revealed the most clean canal surface regardless of the size of canal at apical third of root canal (p < 0.05). 2. Glyoxide in combination with 3.5% sodium hyphchlorite showed no significant difference in cleaning effect of canal surface compared with 3.5% sodium hypochlorite and normal saline solution at the apical third of narrow canal. 3. Glyoxide in combination with 3.5% sodium hypochlorite revealed no significant difference in debridement of canal walls compared with 3.5% sodium hypochlorite in combination with 3% hydrogen peroxide and saline solution at the middle third of narrow and large canals.

  • PDF

A SCANNING ELECTRON MICROSCOPIC STUDY OF THE CLEANSING EFFECT OF RC-PREP ON THE DENTINAL WALLS OF THE ROOT CANAL (RC-Prep의 근관정화효과(根管淨化效果)에 관(關)한 주사전자현미경적(走査電子顯微鏡的) 연구(硏究))

  • Lim, Sung-Sam
    • Restorative Dentistry and Endodontics
    • /
    • v.7 no.1
    • /
    • pp.65-69
    • /
    • 1981
  • This study was conducted to evaluate the cleansing effect of RC-Prep (10% Urea-peroxide, 15% EDTA) on apical third of root canal. Thirty single rooted human teeth were divided into three groups, and ten canals in each group were all enlarged three sizes greater than their original diameter with K-type files and irrigated with each of three irrigants. The three used irrigants were RC-prep (Premier Co.) in combination with 3.5% Sodium hypochlorite, Normal saline, 3.5% Na OCL. In each group, one of three irrigants were used in conjunction with instrumentation as they would be during clinical condition. After final irrigation, the canals were dried with paper points and the teeth were split longitudinally. The cleanness of canal walls iii the apical region were examined with Scanning Electron Microscope. The following results were drawn. 1. The use of Rc-Prep in combination with 3.5% NaOCl showed more clean canal surface than the use of other two irrigants. 2. The canals used RC-Prep in combination with 3.5% NaOCl revealed remnants of pulp tissue and smeared layer, but the openings of dentinal tubules were relatively clean and wide. 3. There was no significant difference in the debridement effect of 3.5% NaOCl and Saline solution. 4. The use of Saline solution showed great amount of remnants of pulp tissue which couldn't find in the use of 3.5% NaOCl.

  • PDF

Optimum Water Management Practices for Direct Seeding on Paddy Surface of Saline in Soils in Reclaimed Tidelands (서남부 간척지에서 토양염농도별 벼 담수표면직파 파종전.후 물관리방법)

  • Back, Nam-Hyun;Ko, Jong-Cheol;Nam, Jeong-Kwon;Kim, Bo-Kyeong;Park, Hong-Kyu;Kim, Sang-Su;Kim, Chung-Kon
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.52 no.2
    • /
    • pp.204-207
    • /
    • 2007
  • This study was conducted to suggest proper water management practices after and before broadcasting of rice seed on flooded paddy surface at reclaimed saline soil with two different saline levels in Gyehwado Substation of Honam Agricultural Research Institute (HARI) NICS, RDA for two years from 2004 to 2005. The stable seedling stand in low saline soil of 0.1% salinity was obtained by one time of water exchange after soil rotary Whereas in medium saline soilof 0.3% salinity, three times of water exchange was required for the stable seedling stand. Milled rice yield was not affected by frequency of water exchange in low saline soil, while it decreased sharply in one and two times of water exchange compared with three times of water exchange in medium saline soil. Irrigation water immediately after direct seeding increased the number of seeding stand in low saline soil. With the increase in the interval of water exchange after direct seeding, the milled rice yield decreased. Although the continuous water flowing showed the most number of seedling stand and was increased milled rice yield compared with the others interval of water exchange in medium saline soil, the number of seedling stand and milled rice wasn't significantly different up to exchange of two days interval compared with the continuous water flowing.

Characteristics and Distribution of Turbidity and Suspended Matter by the Operation of Sluice Gates in Sihwa Lake (시화호 배수갑문 개폐에 따른 탁도와 부유물질의 분포와 특성)

  • Choi Jung-Hoon;Hong Dae-Byuk;Lim Jong-Wan
    • KCID journal
    • /
    • v.9 no.1
    • /
    • pp.38-47
    • /
    • 2002
  • The Lake Sihwa gradually changes from freshwater lake to saline lake due to inflow of seawater by sluice gates . The changes of lake water are closely related to characteristic and distribution of turbidity and suspended matter. During the period April-Ma

  • PDF

Spatial Analysis of One-dimensional Electrical Resistivity Sounding Data in Saline Water Intrusion Areas (해수침투지역에서 1차원 전기비저항 탐사 자료의 공간분석)

  • Song Sung-Ho;Lee Gyu-Sang;Kim Jin-Sung;Seong Baek-Uk;Park Namsik;Hong Sung-Hun
    • KCID journal
    • /
    • v.12 no.1
    • /
    • pp.28-37
    • /
    • 2005
  • Although experimental analysis for groundwater sample at wells located systematically are very effective to delineate seawater intrusion region at coastal area, this method is restricted in few wells and time. We have conducted electrical resistivity soun

  • PDF

Mediastinitis: a case report (종격동염의 증례보고)

  • Kim, Jae-Hwan;Ryu, Dong-Mok;Jee, Yu-Jin;Lee, Jung-Woo;Lee, Deok-Won
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
    • /
    • v.36 no.6
    • /
    • pp.538-542
    • /
    • 2010
  • Acute mediastinitis is a fatal infection which occurs related to connective tissue of mediastium, in the thoratic organs. Occurrence of mediastinitis due to craniocervical infection is very rare, and is defined as descending necrotizing mediastinitis. November 8th, 2008, man in his early fifties visited ER due to severe swelling on left neck area and dyspnea. Antibiotic were administered immediately, and vast amount of abscess formation on pneumomediastinum and adjacent tissues were observed via chest computed tomography. With cooperation of thoracic and cardiovascular surgery department, emergency incision and drainage with drain insertion was done to remove abscess, and control the infection. After surgery, everyday saline irrigation through drain was done during hospitalization, with continues antibiotic therapy. Descending necrotising mediastinitis is a most rare and dangerous infection which occurs on oropharyngeal area. In case of descending necrotising mediastinitis, accurate diagnosis, airway maintenance, remove of abscess by incision and drainage, aggressive antibiotic therapy and continuous saline irrigation is necessary to increase patient survivability. Also, computed tomography with contrast media is essential to figure out the size and location of the infection and abscess formation.

Comparative Study on Subgingival Irrigation Using Some Oral Mouth Rinses on Early Healing Process of Periodontal Inflammation (수 종의 구강세정제에 의한 치은연하 세정이 치주염 초기치유에 미치는 영향에 관한 비교 연구)

  • Yun, Gi-Yon;Kim, Kang-Ju;You, Hyung-Keun;Shin, Hyung-Shik
    • Journal of Periodontal and Implant Science
    • /
    • v.28 no.3
    • /
    • pp.465-475
    • /
    • 1998
  • The purpose of this study was to investigate the comparative effects of subgingival irrigation using some oral mouth rinses on early healing process of periodontal inflammation. The study population consisted of 13 patients with periodontal inflammation and distributed into 4 groups. Oral hygiene instruction, delicate scaling and root planing were done and then irrigated per 3 days during 2 weeks in situ with 1 of 4 solutions ; normal saline, C31G, Benzotonium chloride and tetracycline. Examination regarding probing pocket depth, plaque index, sulcular bleeding index, gingival index, gingival recession and leukocytes differential count was performed. Evaluation was made at the baseline and 2 weeks after non-surgical periodontal therapy. The results were as follows : 1. Clinical indices including probing pocket depth, plaque index, sulcular bleeding index, gingival index and gingival recession were significantly improved from baseline to 2 weeks. But there was no significant differences among 4 groups. 2. PMNs percent on leukocytes differential count was significantly decreased from baseline to 2 weeks on all groups. Those of tetracycline and C31G were significantly decreased than those of normal saline group. These results suggest that clinical indices were not different, but the decrease of inflammation were significantly different among some mouth rinses.

  • PDF