• Title/Summary/Keyword: Sexual organ

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Occurrence of Unfertilized Eggs in the Mulberry Silkworm, Bombyx mori (L.) (Lepidoptera: Bombycidae)

  • Saheb, N.M. Biram;Singh, Tribhuwan;Saratchandra, Beera
    • International Journal of Industrial Entomology and Biomaterials
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    • v.18 no.1
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    • pp.1-7
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    • 2009
  • Quality of seed in the mulberry silkworm, Bombyx mori (L.) is determined by many important factors, wherein unfertilized eggs play an important role. Unfertilization of eggs are caused by several reasons such as, abnormality in the sexual organs of the male and female, abnormal development of the micropylar end of the egg, unfavorable environmental conditions during spinning, cocoon preservation, imperfect handling of moths, mating, ovipostion, cold storing of pupae / moths and indiscriminate use of male moths etc. Though the presence of unfertilized eggs would in no way affect the fertilized ones and their quality directly, the frequency of their occurrence underrates the quality and brings down the hatching percentage. Lower the occurrence of unfertilized eggs, higher is the rating of seed quality. Of the various intrinsic and extrinsic factors and events involved in egg deposition of an adult silk moth, mating is an instinct and a biological obligation for the ultimate perpetuation of the species and a must to provide stimulus for oogenesis and bring about biochemical changes in the spermatophore of the silkworm in order to ensure the presence of sufficient number of normal sperms and testicular fluid in the female reproductive organ, activating ovulation and accelerating oviposition behavior and egg deposition. An attempt has been made in this article to briefly elucidate the characteristics of unfertilized eggs, causes of their occurrence and its impact as well as the significance in silkworm seed production.

A Study on the Fine Structure of Clonorchis sinensis, a Liver Fluke IV. Probable Function of the Laurer's Canal (간흡충의 미세횡조에 관한 연구 IV. Laurer's canal의 기능)

  • 정계헌
    • Parasites, Hosts and Diseases
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    • v.21 no.2
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    • pp.209-218
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    • 1983
  • A study on the function of the Laurer's canal of Clonorchis sinensis was conducted with help of the light microscope, the transmission electron microscope, and the scanning elctron microscope. Some selected sexual organs concerning with the passages of the spermatozoa and the eggs were observed in detail. The conclusion of this study is that the Laurer's canal may be the copulatory organ of the female reproductive system as Miyazaki et al. suggested in case of lung flukes.

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Studies on the Nutrient Circulation in the Forest Ecosystem 1. On the Decomposition of Sexual Organ-Salix babylonica (삼림생태계에 있어서 양분순환에 관한 연구 1. 생식기관의 분해-수양버들)

  • Young-Deuk Rim
    • The Korean Journal of Ecology
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    • v.4 no.1_2
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    • pp.33-37
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    • 1981
  • This study was carried out to investigate the changes of flower properties due to decomposition in the course of time and results obtained are as follows; 1. The flower shape of Salix babylonica changed so rapid that it was difficult to recognize fragments after 40 days. 2. Total weight decreased by 50% after about 40 days. Loss on ignition changed rapidly for 40 days and then steadily. 3. Remaining carbon content decreased by a half only for first 20 days, then did steadily. 4. The content of phosphorus and total nitrogen slowly during the early period and then rapidly. 5. Above phenomena are supposed to be responisble for water content, nitrogen, and phosphorus.

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Multiple Endocrinologic Complications in Thalassemia Major

  • Wong, Siong Hu;Omar, Julia;Ismail, Tuan Salwani Tuan
    • Korean Journal of Clinical Laboratory Science
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    • v.49 no.4
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    • pp.495-497
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    • 2017
  • Thalassemia major is a genetic disorder with a defective synthesis of either the alpha or the beta chain of hemoglobin A. Blood transfusion is crucial for the survival in these patients. Unfortunately, endocrine dysfunction is a very common complication in these patients and is principally due to excessive iron overload as a result of frequent blood transfusions. Although regular blood transfusion may increase life expectancy, disturbances in growth and pubertal development, abnormal gonadal functions, impaired thyroid, parathyroid and adrenal functions, diabetes, and disorderly bone growth are common side effects. We hereby present a case of a 23-year-old, unmarried woman with beta thalassemia major presenting with primary amenorrhea, poor development of secondary sexual character, and short stature. Thorough history, clinical examination, and laboratory investigation, including dynamic function test (insulin tolerance test) were conducted. These tests confirmed that she had multiple endocrinopathies, including hypogonadotropic hypogonadism, growth hormone deficiency, and subclinical adrenal insufficiency, which were caused by iron overload. She required hormone replacement therapy. Early recognition of possible deficiencies in hypothalamo-pituitary-end organ hormones caused by iron overload in thalassemia patients that undergo frequent blood transfusion procedures is essential. Appropriate treatments, including transfusion regimen and chelation therapy, as well as specific treatment of each complication are the crucial for the successful management and improvement of quality of life these patients.

A Critical Study about the Correlation between the Body without Organ and Blurring Boundary Fashion - Focusing on Philosophical and Sociological Discourses about the Body and the Desire - (기관 없는 신체와 탈영토화 된 패션 사이의 상관관계에 대한 비판적 고찰 - 철학적, 사회학적 신체 담론과 욕망이론을 중심으로 -)

  • Yang, Hee-Young;Lee, Myung-Hee
    • The Research Journal of the Costume Culture
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    • v.18 no.5
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    • pp.824-841
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    • 2010
  • In 21st century, subordinated relationship of fashion from the body has been disappearing, and fashion is understood as variable and creative field. This research aims at analysis about the relationship between the body and fashion depending on the theories about the authority and the desire. So, this utilizes between theoretical study and empirical analysis. For concentrated study, research period limits from 2000 to the present time 2010. Contemporary body and fashion have being changed into various forms and values, become complex and de-territory. Especially, body is symbol of ambivalence eroticism that gives point to sexual property, and the object of fetishism and machine having a desire. This study's purpose draw a parallel with between the limits of contemporary body that couldn't be rid of the capital and desire, and the liberty of fashion that escape from the body's influence has being changed independent and fluid space. This research's results are as follow as; contemporary de-territory fashion is expressed as 1) symbol of the object and physical material property, 2) self-transcendental instrument fashion, 3) independent spatial molding, 4) de-centering fashion.

A review of research on biomedical ethics of nursing college students (간호대학생의 생명의료윤리에 관한 문헌연구)

  • Won, Hyojin
    • Journal of Industrial Convergence
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    • v.19 no.4
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    • pp.49-55
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    • 2021
  • This study attempted to review the research on biomedical ethics of nursing students published in Korea. Keywords included 'nursing students', and 'biomedical ethics', and a total of 26 studies were collected via databases such as KISS, NDSL, RISS. The biomedical ethics awareness was the main concept of biomedical ethics, consisted of right to life of fetus, artificial insemination, organ transplantation, and so on. There were differences in biomedical ethics awareness by ethical education experience, grade, clinical practice experience, and ethical education willingness to attend. Also, major keywords analysed with biomedical ethics were withdrawal of life-sustaining treatment, critical thinking, sexual attitude, nursing professionalism, and death perception. Study results can be used to provide basic data for preparing nursing ethics education in the future.

Conditions of In Vitro Spore Germination and Prothallium Culture for Sporophyte propagation of Polystichum braunii (Spenn.) Fée (좀나도히초미(Polystichum braunii (Spenn.) Fée) 포자체 증식을 위한 기내 포자 발아와 전엽체 배양 조건)

  • Kwon, Hyuk Joon;Han, Ji Hyun;Lee, Cheol Hee;Kim, Soo-Young
    • Journal of Plant Biotechnology
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    • v.44 no.4
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    • pp.454-461
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    • 2017
  • This study was conducted to investigate the optimal conditions for spore germination, prothallus propagation, sporophyte formation, and seedling growth in Polystichum braunii (Spenn.) $F{\acute{e}}e$. The rate of spore germination and early prothalium development was high in Knop (41.2%), which had low mineral content. The optimal medium for prothallus propagation and sexual organ formation was 2MS medium (2% sucrose). Among the various mixtures of cultivation soil (bedding soil, peat moss, perlite, and decomposed granite), a mixture of bedding soil and decomposed granite at a ratio of 2:1 (v:v) had a positive effect on sporophyte formation (276.3 ea/$7.5m^2$). The most efficient conditions for promoting the growth of sporophytes were pots filled with only bedding soil.

The anti-hyperglycemic property of different ginseng partitions

  • Xie, Jing-Tian;Wang, Chong-Zhi;Kim, Stephen;Yuan, Chun-Su
    • Advances in Traditional Medicine
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    • v.5 no.1
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    • pp.1-15
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    • 2005
  • Ginseng is a popular medicinal plant highly valued throughout the world. Asian ginseng is one of the most common species of ginseng. It has long occupied a significant position in oriental medicine and has been justified its name as the 'king herb'. As a nutritional supplement, ginseng is an extremely common and popular herbal medicine in the United States and Canada in recent decades. The multiple constituents of ginseng possess equally multifaceted pharmacological actions as demonstrated by numerous studies. Ginseng root and its constituents influenced the central nervous system, endocrine, cardiovascular, gastrointestinal system, sexual, renal organ and immune system, etc. One important action is its anti-hyperglycemic effect. Previous studies on ginseng demonstrate that only the root of ginseng has been used in the treatment of diabetes, while the other parts of ginseng plant were always neglected. Recently, we analyzed the constituents of ginseng berry, leaf and discovered that ginseng berry, leaf extracts and its total ginsenosides have the ability to reduce hyperglycemia and body weight and increase the peripheral glucose utilization in obese or diabetic ob/ob or db/db mice. Our data suggest that all parts of ginseng plant, including root, berry, leaf and stem exhibit potent anti-hyperglycemic and anti-obese effects and may provide an opportunity to develop a novel class of anti-diabetic agents.

The Expressive Characteristics of the Posthuman Body in Fashion Illustration (패션 일러스트레이션에 반영된 포스트휴먼의 신체 표현특징)

  • Choi, Jung-Hwa
    • Journal of the Korean Society of Clothing and Textiles
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    • v.35 no.9
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    • pp.1085-1098
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    • 2011
  • In the $21^{st}$ century, technology is a tool for the expansion of the five senses and physical ability that works as an element for posthuman identity. This study analyzes and theorizes on the characteristics of the posthuman body in fashion illustration. The method of this study analyzes documentaries about posthuman and fashion illustration. The results are as follow. Posthuman body types are classed as hybrid body, plastic surgery body, and digital body. The characteristics of the posthuman body are categorized as ultra- functional prosthetic, mythical undifferentiated, radical plastic surgery type and post-physical digitization type. The ultra-functional prosthetic type shows a restored body and upgraded functional body through a machine hybrid, cyborg suit and mannequin hybrid. It is a break from classical gender identity to form a nerve sense extension that displays physical and abstract power. The mythical undifferentiated type shows a therianthropic form, parts of an animal body, radical skin and gender bending. It represents the return to an undifferentiated world, the desire of a powerful being and the possibility of radical transformation. The radical plastic surgery type shows a photomontage of an ideal body, transgendered body, grotesque body marking, absence of partial or overall face organ and the expansion of abnormal body organs. It represents the expression of narcissism, unconscious desire, fantasy, fear and suggests an alternative ideality, sexual attachment and ambiguous gender identity. The post-physical digitization type shows an imperfect form or duplicated ego image through the omission of the body silhouette or detailed form, fragmented image using net, representative self like optical illusion using typography, an imperfect vague silhouette and immaterial body outline through the use of virtual light. It represents the lack of desire, narcissism, fluidity in a virtual space, the continued creation of a new self, ambiguous gender identity and the liberation of environment, sex, and race. Likewise, the posthuman in fashion illustration shows the absence of a species boundary, destruction of classical gender identity, a new personality and virtual self image.

Population Dynamics of Arisaema robustum (넓은잎천남성 (Arisaema robustum) 개체군의 동태)

  • 민병미;유진숙
    • The Korean Journal of Ecology
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    • v.21 no.1
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    • pp.27-33
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    • 1998
  • Arisaema robustum, which has the ability to change sex, was studied in a temperate broadleaf forest of Sanseong-ri, Joongbu-myeon, Gwangju-gun, Kyonggi Province, Korea. \ulcornerThe study, carried out from 1993 to 1997, focused on population dynamics energy budget among organs, size distribution, mortality, the relationships between sex and size, seed production and germination rate. In terms of energy budget among the organs, the ratio of aboveground to belowground biomass was 36.6 : 63.4 in non-female plants, and 81.4 : 18.6 in female plants. Also, in female plants, the ration of leaf to sexual organ biomass was 39.5 : 41.9. Therefore, the belowground ratio of female plants was lower than that of non-female plants. Plants were classified into 8 levels relative to the amount of leaf area by $100cm^2$. The rates of the smallest and the largest classes were 49% and 1%, respectively, and population distribution by size was relatively stable. The mortality averaged 13.1% per year and decreased in inverse proportion to leaf size (6.6% in the smallest and 0.0% in the largest size classes). Leaf areas were $64.1{\pm}48.5cm^2$ in non-flowering plants, $232.1{\pm}123.9cm^2$ in males and $444.8{\pm}153.9cm^2$ in females. The increase rates of leaf area per year varied from 1.9% in plants changing from female tomale, to 152.4% in plants changing from non-flowering to female. But plants which remained female for 2 years showed a decrease of 34.7%. >From this result, it is thought that the female plants invest more energy to reproduction than to vegetative organs. The correlation coefficient (CC) value between plant size and the number of seeds produced (0.55) was larger than the CC value between plant size and total seed weight (0.73). That is, the larger the plant size, the heavier the seed produced. The germination rate increased along with seed weight, and it was 95% in plants which were over 60mg fresh weight/seed.

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