27 research outputs found
νκ΅μΈ μ½νΈνΈμμ μλ° κ°λ°©κ°λ Ήλ΄μ₯ μ°κ΄ μλ‘μ΄ μ μ μ λ³μ΄ λ°κ΅΄ μ°κ΅¬
νμλ
Όλ¬Έ (λ°μ¬) -- μμΈλνκ΅ λνμ : μκ³Όλν μνκ³Ό, 2020. 8. λ°κΈ°νΈ.Primary open-angle glaucoma (POAG) can develop even within normal ranges of intraocular pressure, and this type of glaucoma (so-called normal-tension glaucoma [NTG]) is highly prevalent in East Asia including Korea and Japan. We conducted exome chip analysis to identify low-frequency and rare variants associated with POAG from the primary cohort (309 POAG patients and 5,400 control, all Koreans). For replication, Korean (310 POAG patients and 5,612 controls) and Japanese (565 POAG patients and 1,104 controls) cohorts were further investigated by targeted genotyping. For known POAG-related gene variants in other ethnicities, representative POAG-related single nucleotide polymorphisms (SNPs) from six loci (CDKN2B-AS1, SIX1/SIX6, ATOH7, CDC7-TGFBR3, CAV1, TMCO1) were selected and genotyped from discovery (POAG = 309, heathy = 5,400) and replication cohorts from Korea (POAG = 310, healthy = 5,612 and POAG = 221, healthy = 6,244, respectively). SNP rs116121322 in LRRC27 showed nominally significant association with POAG in the discovery cohort (OR = 29.85, P = 2.2Eβ06). This SNP was validated in the Korean replication cohort but only in the NTG subgroups (OR = 9.86, P = 0.007). Japanese replication cohort did not show significant association with POAG (P = 0.44). However, the meta-analysis in the entire cohort revealed significant association of rs116121322 with POAG (ORcombined = 10.28, Pcombined = 1.4Eβ07). The LRRC27 protein expression was confirmed from human trabecular meshwork cells. For gene-based testing, METTL20 showed a significant association in POAG (Pcombined = 0.002) and in the subgroup of NTG (Pcombined = 0.02), whereas ZNF677 were significantly associated with only in the subgroup of high-tension glaucoma (Pcombined = 1.5Eβ06). In terms of previously known POAG-related variants, rs1900004 in ATOH7 (OR = 1.29, P = 0.0024); rs1063192 (OR = 0.69, P = 0.0006), rs2157719 (OR = 0.63, P = 0.0007), and rs7865618 (OR = 0.63, P = 0.0006) in CDKN2B-AS1, and rs10483727 in SIX1/SIX6 (OR = 0.68, P = 7.9Eβ05) were nominally associated with the risk of POAG. The replication cohorts revealed significant associations with rs2157719 (OR = 0.72, P = 0.0135), rs1063192 (OR = 0.63, P = 0.0007) and rs7865618 (OR = 0.52, P = 0.0004) in CDKN2B-AS1. A mega-analysis from the entire Korean population revealed significance with rs1063192 (OR = 0.77, P = 6.0Eβ05), rs2157719 (OR = 0.63, P = 0.0007) and rs7865618 (OR = 0.58, P = 1.9Eβ06) in CDKN2B-AS1 and with rs10483727 in SIX1/SIX6 (OR = 0.79, P = 9.4Eβ05), with the same direction of effect between the discovery association and the replication sample. Our findings may provide further genetic backgrounds into the pathogenesis of POAG, especially for the patients who have lower baseline intraocular pressures.μλ° κ°λ°©κ°λ
Ήλ΄μ₯μ μ μ μμ λ²μμμλ λ°μν μ μμΌλ©°, μμ μ μμμλ
Ήλ΄μ₯μΌλ‘ λΆλ¦¬λ μ΄λ¬ν μ νμ λ
Ήλ΄μ₯μ νκ΅κ³Ό μΌλ³Έμ λΉλ‘―ν λμμμκ΅κ°μμ μ λ³μ¨μ΄ λ§€μ° λλ€. λ³Έ μ°κ΅¬μμλ μλ° κ°λ°©κ°λ
Ήλ΄μ₯κ³Ό μ°κ΄λμ΄ μλ μ λΉλ/ν¬κ· μ μ λ³μ΄λ₯Ό νμνκΈ° μν΄ μΌμ°¨ μ½νΈνΈ (μλ° κ°λ°©κ°λ
Ήλ΄μ₯ 309λͺ
, μ μκ΅° 5400λͺ
, λͺ¨λ νκ΅μΈ)μμ μμμΉ© λΆμμ μννμλ€. κ²μ¦μ μν΄ νκ΅μΈ μ½νΈνΈ (μλ° κ°λ°©κ°λ
Ήλ΄μ₯ 310λͺ
, μ μκ΅° 5612λͺ
)μ μΌλ³ΈμΈ μ½νΈνΈ (μλ° κ°λ°©κ°λ
Ήλ΄μ₯ 565λͺ
, μ μκ΅° 1104λͺ
)μμ μ μ μνμ μΆκ° λΆμνμλ€. νμΈμ’
μμ μλ° κ°λ°©κ°λ
Ήλ΄μ₯κ³Ό μ°κ΄λ κ²μΌλ‘ λ³΄κ³ λ λνμ μΈ 6κ° μ μ μ (CDKN2B-AS1, SIX1/SIX6, ATOH7, CDC7-TGFBR3, CAV1, TMCO1) λ¨μΌμΌκΈ°λ€νμ± (SNP)μ μ μ νμ¬ μΌμ°¨μ½νΈνΈ (μλ° κ°λ°©κ°λ
Ήλ΄μ₯ 309λͺ
, μ μκ΅° 5400λͺ
, λͺ¨λ νκ΅μΈ)μ κ²μ¦μ½νΈνΈ (#1: μλ° κ°λ°©κ°λ
Ήλ΄μ₯ 310λͺ
, μ μκ΅° 5612λͺ
, #2: μλ° κ°λ°©κ°λ
Ήλ΄μ₯ 221λͺ
, μ μκ΅° 6244λͺ
, λͺ¨λ νκ΅μΈ)μμ μ μ μνμ λΆμνμλ€. μΌμ°¨ μ½νΈνΈμμ LRRC27 μ μ μμ SNP rs116121322μ΄ μ μνκ² μλ° κ°λ°©κ°λ
Ήλ΄μ₯κ³Ό μ°κ΄λμλ€ (OR = 29.85, P = 2.2Eβ06). μ΄ SNPλ νκ΅μΈ μ½νΈνΈμμλ μΆκ° κ²μ¦ λμμΌλ (OR = 9.86, P = 0.007) μΌλ³ΈμΈ μ½νΈνΈμμλ μλ° κ°λ°©κ°λ
Ήλ΄μ₯κ³Ό μ μν μ°κ΄μ΄ μμλ€ (P = 0.44). κ·Έλ¬λ μ 체 μ½νΈνΈμμ μνν λ©νλΆμμμλ μλ° κ°λ°©κ°λ
Ήλ΄μ₯κ³Ό μ μν μ°κ΄μ 보μλ€ (ORcombined = 10.28, Pcombined = 1.4Eβ07). λν LRRC27 λ¨λ°±μ§μ΄ μΈκ°μ¬μ μ£ΌμΈν¬μμ λ°νλλ κ²μ νμΈνμλ€. μ μ μ μμ€μ λΆμμμ, METTL20 μ μ μκ° μλ° κ°λ°©κ°λ
Ήλ΄μ₯ (Pcombined = 0.002) κ³Ό μ μμμλ
Ήλ΄μ₯κ΅° (Pcombined = 0.02)μμ μ μν μ°κ΄μ 보μκ³ ZNF677 μ μ μλ κ³ μμλ
Ήλ΄μ₯κ΅°μμ μ μν μ°κ΄μ 보μλ€ (Pcombined = 1.5Eβ06). νμΈμ’
μμ μλ° κ°λ°©κ°λ
Ήλ΄μ₯κ³Ό μ°κ΄λ κ²μΌλ‘ λ³΄κ³ λ μ μ μ λ³μ΄ μ€μμ ATOH7 μ μ μμ rs1900004 (OR = 1.29, P = 0.0024), CDKN2B-AS1 μ μ μμ rs1063192 (OR = 0.69, P = 0.0006), rs2157719 (OR = 0.63, P = 0.0007), rs7865618 (OR = 0.63, P = 0.0006) κ·Έλ¦¬κ³ SIX1/SIX6 μ μ μμ rs10483727 (OR = 0.68, P = 7.9Eβ05)κ° μλ° κ°λ°©κ°λ
Ήλ΄μ₯κ³Ό μ μν μ°κ΄μ 보μλ€. κ²μ¦μ½νΈνΈμμλ CDKN2B-AS1 μ μ μμ rs2157719 (OR = 0.72, P = 0.0135), rs1063192 (OR = 0.63, P = 0.0007), rs7865618 (OR = 0.52, P = 0.0004)κ° μ μν μ°κ΄μ 보μλ€. μ 체 νκ΅μΈ μ½νΈνΈ ν΅ν© λΆμμμ CDKN2B-AS1 μ μ μμ rs1063192 (OR = 0.77, P = 6.0Eβ05), rs2157719 (OR = 0.63, P = 0.0007), rs7865618 (OR = 0.58, P = 1.9Eβ06), κ·Έλ¦¬κ³ SIX1/SIX6 μ μ μμ rs10483727 (OR = 0.79, P = 9.4Eβ05)κ° μ μνκ² μλ° κ°λ°©κ°λ
Ήλ΄μ₯κ³Ό μ°κ΄λμλ€. λ³Έ μ°κ΅¬λ₯Ό ν΅ν΄ μλ° κ°λ°©κ°λ
Ήλ΄μ₯, νΉν κΈ°μ μμμ΄ μ μλ²μμΈ νμλ€μ μ μ μ λ³μΈμ λν μ΄ν΄λ₯Ό λμΌ κ²μΌλ‘ νλ¨λλ€.Introduction 1
Materials and Methods 4
Results 13
Discussion 39
References 51
Abstract in Korean 60Docto
DAF 곡μ μμ μ μκ³μκΈ°λ₯Ό ν΅ν νλ‘νΈ μκ±°μ₯μΉμ μ΄μ μ§λ¨
νμλ
Όλ¬Έ (μμ¬)-- μμΈλνκ΅ λνμ : 건μ€ν경곡νλΆ, 2014. 8. ν무μ.μ©μ‘΄κ³΅κΈ°λΆμλ²(Dissolved Air Flotation, DAF)μ λ―ΈμΈκΈ°ν¬λ₯Ό μ΄μ©νμ¬ μμ€μ μ
μλ₯Ό λΆμμμΌ μ κ±°νλ 곡μ μ΄λ€. μ΄λ μΌλ°μ μΌλ‘ κΈμνΌνμ§, νλ‘νμ±μ§, κΈ°ν¬ λ°μμ₯μΉ, λΆμλΆλ¦¬μ‘°λ‘ ꡬμ±λλ€. λ―ΈμΈκΈ°ν¬μ νλ‘μ΄ κ²°ν©νμ¬ νμ±λ νλ‘νΈ(float)λ μνλ©΄μ μΆμ λλ©°, μ΄λ μκ±°μ₯μΉμ μν΄ μ°μμ μΌλ‘ νΉμ κ°νμ μΌλ‘ μ κ±°λλ€. νλ‘νΈ μκ±°μ₯μΉλ λ°μμ‘° μ 체μ κ±Έμ³ μ΄μ λλ―λ‘ μ μ μΉ λͺ»ν μ΄μ μ νλ‘νΈμ μΉ¨κ°μ μΌκΈ°νμ¬ μ 체곡μ μ ν¨μ¨μ λ¨μ΄νΈλ¦°λ€κ³ μλ €μ Έ μλ€. νμ§λ§ κ΄λ ¨ μ°κ΅¬ λ° μ΄μ μ§μΉ¨μ΄ λΆμ‘±νμ¬, νμ₯ μ€λ¬΄μμ κ²½νμ μμ‘΄νμ¬ μ΄μ λκ³ μλ€.
λ°λΌμ λ³Έ μ°κ΅¬μ λͺ©μ μ, μκ±°μ₯μΉμ μ’
λ₯(hydraulic, chain-Βflight) λ³ μ΄μ 쑰건 λ³κ²½μ λ°λ₯Έ μ²λ¦¬ν¨μ¨ λ³νλ₯Ό μΈ‘μ νμ¬ μ΅μ μ΄μ 쑰건μ μ μνλλ° μλ€. μ΄λ₯Ό μν΄ μ²«μ§Έ, μ
μμ κ±°λ λΆμμ΄ κ°λ₯ν μ
μκ³μκΈ°(onΒ-line particle counter)λ₯Ό μ μ©νμ¬ κ³΅μ μ ν¨μ¨μ νκ°νμλ€. λμ§Έ, μκ±°μ₯μΉμ μ μ ν μ΄μ μ£ΌκΈ°λ₯Ό κ²°μ νκΈ° μν΄ νλ‘νΈ μΈ΅μ νμ±μ λΆμνμλ€. μ΄λ₯Ό ν΅ν΄ μκ±°μ₯μΉμ μ’
λ₯λ³ μ΅μ μ΄μ 쑰건μ λμΆνμλ€.
μ°κ΅¬κ²°κ³Ό, λ€μν μ΄μ 쑰건μ λ°λ₯Έ μ²λ¦¬ν¨μ¨ λ³νλ₯Ό μ
μκ³μκΈ°λ₯Ό ν΅ν΄ μ λ°νκ² μΈ‘μ ν μ μμλ€. λν μνλ§μ μμΉλ³λ‘ μ
μμλ₯Ό μΈ‘μ ν¨μΌλ‘μ¨, 곡μ λ΄ μ
μμ κ±°λμ λΆμν μ μμλ€. μ΄λ νλκ°μ ν΅ν΄ μ 체곡μ μ ν¨μ¨μ μ§λ¨νλ κΈ°μ‘΄μ λ°©λ²λ³΄λ€ μ
μκ³μκΈ°λ₯Ό μ΄μ©ν λ°©λ²μ΄ λ³΄λ€ μ νν¨μ μλ―Ένλ€.
νλ‘νΈ μΈ΅μ΄ μ΅λλ‘ νμ±λ μ μλ νκ³ λκ»(λ³Έ μ°κ΅¬μμλ μ½ 8 cm)κ° μ‘΄μ¬νμλ€. λν νλ‘νΈ μΈ΅μ λκ»κ° μ΅λλ‘ νμ±λ μμ (λ³Έ μ°κ΅¬μμλ μ½ 16 λΆ) μ΄νμ, μ μΆμμ μ
μμκ° ν¬κ² μ¦κ°νμλ€. μ΄λ μ΅λ λκ»λ‘ νμ±λ νλ‘νΈ μΈ΅μ μλ‘μ΄ λΆμλ νλ‘νΈκ° κ²°ν©λμ§ λͺ»νκ³ νν₯μ μμ μν΄ μ μΆλΆλ‘ λ°°μΆλμκΈ° λλ¬Έμ΄λ€. λ°λΌμ νλ‘νΈ μΈ΅μ΄ νκ³ λκ»λ‘ νμ±λκΈ° μ΄μ μ μκ±°μ₯μΉλ₯Ό μ΄μ νμ¬, μ μ ν νλ‘νΈ μΈ΅μ μ μ§νλ κ²μ΄ νμνλ€.
μκ±°μ₯μΉμ μ’
λ₯μ μκ΄μμ΄, νλ‘νΈ μΈ΅μ΄ μ΅λ λκ»λ‘ νμ±λλλ° μμλλ μκ° λ³΄λ€ μ§§μ μ£ΌκΈ°λ‘ μ΄μ ν λ μ μΆμμ μ
μμκ° μμ μ μΌλ‘ λνλ¬λ€. λν μ΄μ μ£ΌκΈ°κ° κΈΈμ΄μ§μλ‘ κ³΅μ μ μ²λ¦¬ν¨μ¨μ΄ λκ² κ΄μ°°λμλ€. μ΄λ μΆ©λΆν μκ°λμ νλ‘νΈκ° λμΆλμ΄ μκ±°μ₯μΉμ μ΄μ μ μν 좩격μ 견λλ κ²μΌλ‘ νλ¨λλ€.
λ³Έ μ°κ΅¬ κ²°κ³Όλ DAF 곡μ μμ νλ‘νΈ μκ±°μ₯μΉμ μ΄μ μ μ΅μ ννκΈ° μν κΈ°μ΄μ μΈ μλ£λ‘ μ¬μ©ν μ μμ κ²μ΄λ€. λν μ
μκ³μκΈ°λ₯Ό μ΄μ©ν μ²λ¦¬ν¨μ¨ μΈ‘μ λ°©λ²μ μκ±°μ₯μΉ λΏ λ§ μλλΌ λ€λ₯Έ ꡬμ±μμμ μ΄μ μ μ§λ¨νκ³ μ΅μ ννλλ° νμ©ν μ μμ κ²μΌλ‘ κΈ°λλλ€.1. μλ‘ 1
1.1 μ°κ΅¬λ°°κ²½ 1
1.2 μ°κ΅¬λͺ©μ 2
2. λ¬Έν κ³ μ°° λ° μ΄λ‘ μ μ°κ΅¬ 3
2.1 μ©μ‘΄κ³΅κΈ°λΆμλ²(Dissolved Air Flotation) 3
2.1.1 μ©μ‘΄κ³΅κΈ°λΆμλ²μ κ°μ 3
2.1.2 μ©μ‘΄κ³΅κΈ°λΆμλ²μ μ΄μ 쑰건 4
2.2 μ©μ‘΄κ³΅κΈ°λΆμλ²μ μ΄λ‘ 6
2.2.1 μ©μ‘΄κ³΅κΈ°λΆμμ μ΄λ‘ μ λ°μ 6
2.2.2 μ©μ‘΄κ³΅κΈ°λΆμμ μ΄λ‘ 9
2.3 DAF λΆλ¦¬μ‘° λ΄μ νλ¦ νΉμ± 16
2.4 νλ‘νΈ μκ±°μ₯μΉ 18
2.4.1 νλ‘νΈ μκ±°μ₯μΉμ μ’
λ₯ λ° νΉμ§ 18
2.4.2 νλ‘νΈ μκ±°μ₯μΉμ μ€κ³μ§μΉ¨ 21
3. μ€νμ₯μΉ λ° λ°©λ² 22
3.1 μ€νμ₯μΉ 22
3.1.1 νλ‘νμ±μ§(flocculation basin) 22
3.1.2 λ°μμ‘°(reactor) 23
3.1.3 νλ‘νΈ μκ±°μ₯μΉ(float removal system) 25
3.2 μ€νλ°©λ² 27
3.2.1 μ
μ κ°μ μΈ‘μ 27
3.2.2 νλ μΈ‘μ 28
4. μ
μκ³μκΈ°λ₯Ό ν΅ν DAF 곡μ μ μ§λ¨ 30
4.1 μλ‘ 30
4.2 μ€νλ°©λ² λ° λ΄μ© 30
4.3 μ€νκ²°κ³Ό 33
4.3.1 DAF 곡μ μμ λ°μμ‘° λ΄ μ
μ λ³ν 33
4.3.2 DAF 곡μ μμ μ μΆμ μ
μ λ³ν 35
5. DAF 곡μ μμ λ°μμ‘° λ΄ νλ‘νΈ μΈ΅ νμ± 36
5.1 μλ‘ 36
5.2 μ€νλ°©λ² λ° λ΄μ© 36
5.3 μ€νκ²°κ³Ό 38
5.3.1 νλ‘νΈ μΈ΅ λκ»λ³ν 38
5.3.2 νλ‘νΈ μΈ΅ νμ±μ λ°λ₯Έ μ μΆμ μ
μ λ³ν 39
6. λ€μν νλ‘νΈ μκ±°μ₯μΉμ μ΄μ μ΅μ ν 40
6.1 μλ‘ 40
6.2 μ€νλ°©λ² λ° λ΄μ© 40
6.2.1 ChainΒflight μκ±°μ₯μΉμ μ΄μ 쑰건 40
6.2.2 Hydraulic μκ±°μ₯μΉμ μ΄μ 쑰건 42
6.3 μ€νκ²°κ³Ό 44
6.3.1 ChainΒflight μ΄μ μ λ°λ₯Έ μ μΆμ μ
μ λ³ν 44
6.3.2 Hydraulic μ΄μ μ λ°λ₯Έ μ μΆμ μ
μ λ³ν 47
7. κ²°λ‘ 50
8. μ°Έκ³ λ¬Έν 52Maste
λ΄ κΈμ°κΈ°μ μΈ κ°μ§ μμΉ
λνμ μ¬λΌμμμΌ μκ²°λ ννμ κΈμ΄λΌλ κ²μ μ²μμΌλ‘ μ¨λ³΄κ² λ λλ, ν΄κ° κ±°λλ μλ‘ κ·Έ μ λλ₯Ό λν΄κ°λ μ΄λ€ μμ€ λλ¬Έμ νλ€μ΄νλ€. λ λ§μ΄ λ°°μ°κ³ λλμλ‘, κΈμ°κΈ°κ° μ μ λ μ΄λ €μμ§λ€. κΈμ μ°κ±°λ μ½μ κ²½νμ΄ μμμ λ°λΌ μκΈ° κΈμ λν κΈ°λμΉκ° λμμ§κΈ° λλ¬Έμ΄λΌκ³ λ μκ°νλ€. νμ§λ§ μλ‘κ² μκ² λ κ²μ κΈλ‘ νννλ € νμ λμλ λ΄κ° μ΄μ κ³Ό λκ°μ λ§λ§μ λ°λ³΅νκ³ μμ λΏμ΄λΌλ κ²μ κΉ¨λ¬μμ λλ κ½€λ λΉνΉμ€λ¬μ λ€. κ·Έλ¬λκΉ κΈ°λμΉκ³ λκ³ κΈμ°κΈ° μμ²΄κ° μ μ리걸μμ νκ³ μμλ κ²μ΄λ€
μΈμ²΄νμ‘μ 보κ΄μ΄ DNA λΆλ¦¬μ μμ λμ λ―ΈμΉλ μν₯
Thesis(doctoral)--μμΈλνκ΅ λνμ :μΉμνκ³Ό ꡬκ°λ΄κ³ΌΒ·μ§λ¨νμ 곡 ,2005.Docto
(The) effects of cortisone acetate on the rat placenta
μνκ³Ό/λ°μ¬[νκΈ]
[μλ¬Έ]
Glucocorticoids, such as cortisone have been known to be teratogenic in mice and
also induce reabsorption and abortion of the fetus in pregnant rabbits, rats, mice,
and guinea pigs(Domm and Leroy, 1951; Leroy and Domm, 1951; DeCosta and Abelman,
1952; Robson and Sharaf, 1952; Lee and Ring, 1956; Ingallis and Curley, 1957). But,
it is not known whether cortisone produces fetal malformation by direct action on
the embryo or through some action on the pregnant female (Kalter, 1965). However
the fact that fertility as well as uterine, placental, and fetal development is in
several ways dependent upon maternal adrenocorticoid hormone production is now well
documented (Amoroso, 1955). To date, only a few investigators have recorded
cortisone-induced morphological changes in the placentas of experimental animals.
The present study is an attempt to investigate the probable site of influence in
the placenta by cortisone, that could be related to fetal death, reabsorption,
using the light and electron microscopic examinations in albino rats.
Materials and Methods
Female albino rats weighing around 200 gms. were used for the experiment and
mated. The pregnant females were divided into two groups as follows.
Group β
: Normal control (35 pregnant rats)
Group β
‘: Cortisone treated (35 pregnant rats)
Each group was subdivided into seven groups. In the experimental group, daily
dose of 5 mg of cortisone acetate per animal was given intramuscularly. The
placentas were obtained on the 10th, 12th, 14th, 16th, 18th, 19th, and 20th day of
the pregnancy in both experimental and control groups. For histologic examination
the routine hematoxylin-eosin staining method was performed, and PAS staining
method for mucopolysaccharide and glycogen, methyl-green pyronin staining method
for RNA, and reticulum staining method for reticulum fiber was also applied. For
the electron microscopic examination the tissue was fixed in 1% osmium tetraoxide
in phosphate buffer of pH 7.4 for 2 hours, and embedded in Epon 812 after
dehydration. Sections were made with a glass knife of 400 to 500 A in thickness and
stained with uranyl acetate and lead hydroxide. Observations were made with Hitachi
HU 11-E model electron microscope.
The following results were made in observation of the placental changes of the
pregnant rats treated with cortisone acetate by the light and electron microscopy.
1) The wet placental weights of cortisone-treated groups were decreased in
comparison with that of the control group.
2) In cortisone-treated groups even though the morphologic changes of vitelline
membrane and junctional zone of the placenta were not much different from those of
the control group, the placental labyrinth showed early congestion and atrophy,
with early degenerative changes of trophoblasts.
3) The positive periodic acid Schiff stained material in the trophoblasts of the
rat placenta treated with cortisone was relatively decreased at the late
gestational period. Meanwhile the methyl-green pyronin reaction of trophoblasts in
those group showed decreased reaction of trophoblasts in early phase of placental
formation.
4) The dilatation of rough endoplasmic reticulum and detachment of ribosomes in
trophoblasts of early placental formation were found by electron microscopy.
On the basis of the above findings the cortisone induces marked congestion of
placental labyrinth, atrophy and degeneration of trophoblasts, decreased positive
meterial of PAS, and interference of protein synthesis in the rat placenta.
It is speculated that those changes might be related with the death, abortion and
reabsorption of the fetus.restrictio
A Study on synovial fluid analysis of chronic TMD and effects of pumping technique λ§μ± μ κ΄μ μ₯μ νμμ νμ‘λΆμ λ° μ κ΄μ λμ½μ μ ν¨κ³Όμ κ΄ν μ°κ΅¬
Thesis (master`s)--:μμΈλνκ΅ λνμ :μΉμνκ³Ό ꡬκ°λ΄κ³Ό.μ§λ¨νμ 곡,1998.Maste
Study on Aristotles explanation of akrasia
νμλ
Όλ¬Έ (μμ¬)-- μμΈλνκ΅ λνμ : μ² νκ³Ό(μμμ² νμ 곡), 2011.2. κ°μμ§.Maste
μ°μμ ν¬μμ±λ°μ벽체μ νμ©μ μν μ μ¬λΌμ΄νΈμ μ κ°μ¬λκ·Έλ₯Ό μ΄μ©ν 볡ν©μ€μΌλ¬Όμ§ μ κ±°λ₯νκ°
νμλ
Όλ¬Έ (μμ¬)-- μμΈλνκ΅ λνμ : 건μ€ν경곡νλΆ, 2012. 2. λ°μ€λ².Artificial island is constructed with dredged materials and landfill waste. However these materials could be considered as the main sources for contamination as they might contain ammonium, cadmuim and phosphate. Also previous researchers show that costal sediments in South Korea were contaminated by ammonium, phosphate and cadmium (Song, 2003). Littoral area of sea could be happened by sudden accident but almost all contamination are caused by artificial behavior. Double sheeted permeable reactive barrier system containing zeolite and steel making slag is possible to be applied to filter multiple contaminants at the same time.
Sequential batch test was firstly performed to select reaction order between zeolite and slag (Test ZS), slag and zeolite (Test SZ) and mixed two materials. In case of phosphate and cadmium removal rate (%), there was no difference between two modules. However in case of ammonium removal rate (%), test ZS showed better removal rate than that of Mixed and test SZ.
Column test 1 was performed to reconfirm removal efficiency depending on reaction order under flow through condition. Among three test methods in sequential batch test, two test mothods, test ZS and test SZ, which showed highest and lowest removal efficiency of ammonium, were tested. Because lower removal efficiency of ammonium than that of other contaminant in sequential batch test was obtained, only ammonium breakthrough curve was obtain in column test 1. The result was analyzed by two-site nonequilibrium model and it showed high reliability (R2). Test ZS showed high removal efficiency than that of test SZ and it was similar to sequential batch test.
Column test 2 was performed to evaluate removal efficiency of multiple contaminants by column test ZS which consists of different depth of zeolite and steel making slag under flow-through condition. In this test four test methods, 10:0, 8:2, 5:5, 7:3, were tested and through obtained breakthrough curve, retardation factor (Rf) partitioning coefficient (Ξ²), and mass transfer coefficient (Ο) were analyzed. In the case of ammonium, breakthrough curve was delayed more with increasing zeolite depth and retardation factor (Rf) of 10:0, 8:2, 5:5, 3:7 were 185.9, 111.2, 109.1, 67.3. In the case of phophate, breakthrough curve was delayed more with decreasing zeolite depth and retardation factor (Rf) of 10:0, 8:2, 5:5, 3:7 were 0, 38.25, 120, 122.4. In the case of cadmuim, breakthrough curve was delayed more with decreasing zeolite depth and retardation factor (Rf) of 10:0, 8:2, 5:5, 3:7 were 48.95, 101.3, 156.1, 207.1.
After column test 2, linear relationship between Rf, Ο and Ξ² and it is possible to predict other column test method parameter without other tests.Maste
The effect of pre-strain on the high and low cycle fatigue properties of cold worked Fe-18Mn-0.2Si-0.03Al TWIP steel
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