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Application of the Distribution Law to Soil-Pesticide Systems
신영오,존H. 베이커,Shin, Young Oh,Baker, John H. 한국토양비료학회 1974 한국토양비료학회지 Vol.7 No.1
농약(農藥)이 토양(土壤)에 흡착(吸着)되는 현상(現象)을 이론적(理論的)으로 구명(究明)하기 위(爲)해 물리화학(物理化學)에서 쓰여온 분배법칙(分配法則)을 적용(適用)하여 다음과 같은 결과(結果)를 얻었다. 1) 토양(土壤)에 흡착(吸着)되는 농약(農藥)의 양(量)은 토양수분(土壤水分) 함량(含量)과 역비례(逆比例) 관계(關係)에 있다. 2) 토양수분함량(土壤水分含量)이 같은 경우 농약(農藥)의 흡착량(吸着量)은 분배율(分配率)(Kd)과 비례(比例)한다. 3) 분배율(分配率)이 큰 토양(土壤)일수록 토양수분(土壤水分)이 흡착(吸着)에 미치는 영향(影響)이 적다. The application of the Distribution Law to soil-pesticide systems yielded the following empirical implications : 1) The amount of the pesticide adsorbed by a soil is negatively proportional to the soil water content. 2) At a given soil water content the amount adsorbed is proportional to the Kd of the soil. 3) The effect of soil water content on the amount of the pesticide adsorbed diminishes with increasing magnitude of the Kd.
Factors Influencing the Adsorption of Atrazine In Massachusetts Soils
신영오,베이커,Shin, Young-Oh,Baker, J.H. 한국토양비료학회 1974 한국토양비료학회지 Vol.7 No.4
토양(土壤)에 흡착(吸着)되는 애트라진(Atrazine)의 양(量)은 마사츄세츠의 토양(土壤)에서는 다음과 같은 조건(條件)에 의(依)해서 결정(決定)된다. 1. 토양유기물(土壤有機物)이 여러 요인중(要因中) 가장 직접적(直接的)인 영향(影響)을 미친다. 2. 흡착작용(吸着作用)과 토양산도(土壤酸度)는 반비예적(反比例的)인 관계(關係)가 있고 토양산도(土壤酸度)는 N-KCl가용(可溶) 알루미늄의 양(量)과 깊은 관계(關係)가 있다. The adsorption of atrazine In Massachusetts soils has been proved to be as the following: 1. Soil organic matter content is the most effective factor in controlling the adsorption. 2. The adsorption is negatively related to the pH of the soil. Soil acidity appears to be closely associated with N-KCl extractable aluminum content.
소의 동결수정란이 수태에 미치는 영향 2 . 자당부유액에 의한 2 단계 평형의 영향
석호봉,이광원,신용식,김호중,조윤연,오대균,지설하,임경순,알디 베이커 ( H . B . Seok,K . W . Lee,Y . S . Shin,H . J . Kim,Y . Y . Cho,D . G . Oh,S . H . Chee,K . S . Im,R . D . Baker ) 한국축산학회 1983 한국축산학회지 Vol.25 No.5
Twenty frozen embryos obtained from high genetically potential donors were introduced by cooperation with the American Holstein Association. The 47 recipients at the National Livestock Breeding Station were intramuscularly injected once or twice with 25㎎ PGF₂α for synchronization of estrus cycle with donors. The frozen embryos were rehydrated in 2-steps sucrose media after thawing at 37℃ and embryo transfer was performed by both of surgical and non-surgical methods. In addition, fresh embryos collected from 3 donors of the Station were transferred. The results were as follows: 1. Twenty-two of 23 fresh embryos obtained from 3 superovulated donors showed good morphology and average 7.3 embryos per donor were collected. 2. Among 47 heads treated, rate of estrus induced by twice of PGF₂α was higher (87.5%) than by once (78.7%), and the rate of heifers was higher than cows. 3. The quality of corpus luteum of 45 recipients synchronized in estrus was composed of 15 cows (33.3%) in excellent or good, 23cows (51.1%) in fair or little poor and 7 cows (15.6%) in no corpus luteum or cystic follicle, respectively. Most of recipients showed fair or little poor corpus luteum. 4. All frozen embryos except seven showed geneally good qualities in results of examination before transfer. 5. Twelve (40%) among 30 embryos were impregnated and all of them were Holstein breeds. 6. Two of 12 frozen and 10 of 18 fresh embryos were concepted, respectively. The conception rate of fresh embryo was higher than that of frozen embryo. 7. Forty-five percentage (rune of 20 recipients) of conception rate by non-surgical were higher than 30% (three of 10 recipients) by surgical method. 8. The surgical conception rates (66.7%) of fresh embryos were higher than non-surgical method (53.3%). However, surgical method (14.3%) of the frowns were lower than non-surgical (20.0%).