CONTENT 1. Misconceptions of Darwin's Theory of Evolution 2. Darwinism against Essentialism and the Concept of Species 3. Function and Biological Explanation 4. The Gene 목차 1. 다윈의 진화론에 대한 오해들 2. 본질주의에 대한 진화론의 반대와 종(Species)의 개념 3. 기능(function)과 생명과학적 설명 4. 유전자 맺음말.

죽고 다시 태어나는 반복의 과정을 논하는 불교의 윤회설은 끊임없이 변화하는 생명현상의 본래 모습을 그대로 보여준다. 어느 생명체도 변하지 않고 영구한 것은 없다. 오래된 개체의 삶이 끝나고 새로운 삶이 시작되는 반복의 자연현상이 윤회이다. 본고는 윤회를 생명과학적으로 해석하며 삼라만상에서 일어나는 윤회란 개체들뿐만 아니라 세포와 분자선상에서도 일어나는 자연스런 생명현상임을 밝히겠다.

The present study examines the physiological alterations in prolactin (PRL) messenger ribonucleic acid (mRNA) and serum PRL levels during the rat estrous cycle and the effed of naloxone, an endogenous opioid peptide receptor antagonist, on PRL gene expression during the rat estrous cycle. Adult female rats exhibiting at least two consecutive 4-day estrous cycles were used in this study. A single injection of naloxone (2mg/kg b.w.) or saline was given sc 30 mm prior to decapitation. Animals were sacrificed at 10:00 (...) h of each stage of the estrous cycle, and at 2-h intervals from 10:00 h to 20:00 h during the proestrus. PRL mRNA and serum PRL levels were determined by an RNA-blot hybridization with the rat PRL cDNA probe and by a PRL radioimmunoassay, respectively. PRL mRNA and serum PRL levels were not dramatically altered in the morning of each stage of diestrus I, II, and proestrus, and naloxone failed to modify the two parameters. During estrus naloxone clearly suppressed serum PRL levels, but it was unable to modify PRL mRNA levels. A more detailed examination of the proestrus stage revealed that PRL mRNA and serum PRL levels fluctuated as a function of time: PRL mRNA levels reached a maximum level at 12:00 h and gradually decreased until 18:00 h. PRL mRNA levels then rose at 20:00 h. No difference in PRL mRNA levels between the control and naloxone-treated groups was observed. Changes in serum PRL level during proestrus were conversely related to changes in PRL mRNA: serum PRL levels were low from 10:00 h to 14:00 h, then increased and reached a maximum level at 16:00-18:00 h. Following then, serum PRL levels were decreased. Naloxone was effective in suppressing the characteristic afternoon surge of PRL from 16:00 h to 20:00 h. These data clearly showed that alterations in PRL mRNA levels were conversely correlated with changes in serum PRL levels on proestrus, indicating differential regulation of PRL gene expression and secretion. (shrink)

Sudden enlightenment is awakening to be attained all at once. Hyun-Eung, a Korean Buddhist monastic, has proposed a new interpretation that sudden enlightenment is the revolutionary awakening of the dynamical and indivisible structure of cognitive subject and objects. I argue that Hyun-Eung’s ‘revolutionary enlightenment’ is achieved through a ‘paradigm shift’ in Thomas Kuhn’s sense as presented in his The Structure of Scientific Revolutions. Enlightenment is obtained when one’s essentialist and realist worldview is replaced, through a revolutionary change of paradigm shift, (...) by a new perspective based on the Buddhist teaching of dependent arising and emptiness. Prior to enlightenment, each person views oneself as a separate and independent individual who has her own essence. However, when our perspective on self and the world changes with the understanding of dependent arising and emptiness, it becomes clear that no one and nothing can exist independently of conditions. Everything comes into existence, abides, and passes out of existence only in dependence on conditions. Sudden enlightenment requires a revolutionary change in one’s perspective of self and the world. I conclude that this concept of revolutionary enlightenment aptly explains the features of sudden enlightenment. (shrink)

Temporal Changes in Ovarian Gonadotropin-Releasing Hormone mRNA Levels by Gonadotropins in the Rat Sung Ho Lee, Eun-Seob Song, Sun Kyeong Yu, Changmee Kim, Dae Kee Lee, Wan Sung Choi l and Kyungjin Kim* Department of Molecular Biofogy and SRC for Cell Differentiation, Seoul National University, Seoul 150-742, Korea; IDepartment of Anatomy, College of Medicine, Gyeongsanf; National University, Chinju 660-280, Korea (Recei·. cd on December 29, 1993) The present study examines whether gonadotropins are involved in the regulation of ovarian GnRH (...) gene expression and how ovarian GnRH gene expression temporalJy correlates with alterations in hypothalamic GnRH, pituitary LH~ gene expression in respons to gonadotropins. Hypothalamic and ovarian GnRH mRNA and pituitary LH~ mRNA levels were determined by respective RNA-blot hybridizations, and ovarian GnRH and estradiol contents and serum LH levels were measured by respective radioimmunoassays. Three animal models such as 1) PMSG-treated, 2) PMSG and heG-treated immature rats and 3) proestrous stage of adult rats were used. Immature rats (25-days old) were administered with PMSG (10 iu) at 10:00 hand 48 h later with heG (10 iu) to induce ovulation. In the PMSG-injected model, hypothalamic GnRH mRNA levels were markedly augmented about 9-fold at 50 h, and pituitary LH mRNA 3-fold at 52 h after PMSG administration. Serum LH levels were increased to the preovulatory surge levels at 56 h, and ovarian GnRH mRNA levels were augmented 4-fold at 60 h after PMSG injection. Administration of heG also induced a marked enhancement in ovarian GnRH mRNA levels in comparison to the values shown in both intact and PMSGtreated rats at 52 hand 54 h, respectively. In the proestrous stage of normal adult rats, pituitary LH~ mRNA levels were peaked at 16:00 h. The preovulatory LH surge was evident at 4 h before increment in ovarian GnRH mRNA levels as shown in PMSG-treated rats. The present study clearly showed the sequential increase in hypothalamic GnRH mRNA, pituitary LH~ mRNA and ovarian GnRH mRNA levels, indicating that ovarian GnRH may play a possible role in the control of follicular maturation and the ovulation process. (shrink)

“Non-Self from the perspective of the Gene” September 2021, Buddhism and Culture (a Korean-language Buddhist magazine sponsored by the Foundation for the Promotion of Korean Buddhism), Korea.

“Non-Self from the perspective of the Gene” November 2021, Buddhism and Culture (a Korean-language Buddhist magazine sponsored by the Foundation for the Promotion of Korean Buddhism), Korea.

"Dependent Arising in Life and Environment" March 2021, Buddhism and Culture (a Korean-language Buddhist magazine sponsored by the Foundation for the Promotion of Korean Buddhism), Korea 생명과 환경이 보여주는 연기(緣起)의 진리.

“Darwin’s Evolutionary Theory of Dependent Arising” January 2021, Buddhism and Culture (a Korean-language Buddhist magazine sponsored by the Foundation for the Promotion of Korean Buddhism), Korea 진화론으로 이해하는 불교: 다윈의 진화론은 연기의 진화론.

“Impermanent Biological Phenomena” July 2021, Buddhism and Culture (a Korean-language Buddhist magazine sponsored by the Foundation for the Promotion of Korean Buddhism), Korea.

“Stem Cells Dependently Arising and Empty” May 2021, Buddhism and Culture (a Korean-language Buddhist magazine sponsored by the Foundation for the Promotion of Korean Buddhism), Korea.

“Buddhism Evolving” December 2021, Buddhism and Culture (a Korean-language Buddhist magazine sponsored by the Foundation for the Promotion of Korean Buddhism), Korea.

The present study examined the endogenous release of luteinizing hormone-releasing hormone (LHRH) from superfused hypothalamic slices derived from Korean native cattie (KNC). In addition, the in vitro secretory pattern of LHRH release in '(NC was compared with that in imported cattle such as Holstein cow. The median eminences (ME) of hypothalamic tissues were dissected out, sliced, and quickly placed in an ice-cold superfusion chamber. Superfusion chambers containing ME slices were maintained in a constant temperature water-bath at 37∘C. Effluents were collected (...) on the ice at 10 min intervals for a 4 hr superfusion period and kept -20∘C prior to LHRH radioimmunoassay. LHRH release was analyzed by the PULSAR algorithm. The spontaneous release of LHRH from both cows was episodic during a 4 hr superfusion period. The mean LHRH release, pulse amplitude and pulse interval m KNC were 11.08± 1.50 pg/min/mg x 10-2, 21.43 1 7.28 pg/mg x 10-2, and 39.42 ± 3.08 min, which was quite similar to those observed in Holstein cows. The basic characteristics of the LHRH pulse generator of KNC appear important for a better understanding about the endocrine function of KNC. (shrink)