• International Journal of Industrial Entomology and Biomaterials
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• 제6권2호
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• pp.191-196
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• 2003

Silkworm body and rearing seat disinfection is an integral part of effective silkworm rearing as it prevents the spread of various diseases through secondary contamination in the rearing bed. Many bed disinfectants are recommended by various research institutes in India. In the present study, eight bed disinfectants viz., Vijetha, Labex, Resham Jyothi, Sanjeevini, Suraksha, Reshamkeet Oushadh, Dithane M45 and Captan recommended by various Sericultural Research Institutions in the country against the spread of common diseases of silkworm were tested to determine their comparative efficacy. For the study, all the treatment batches were introduced with fixed number of specific diseased larvae so as to maintain a constant source of pathogen in the bed and then followed by treatment with respective bed disinfectants. Percent mortality/infection due to each disease was recorded to determine efficacy of bed disinfectant treatment against respective disease. The results show that all the bed disinfectants tested have considerable efficacy against the spread of various diseases in the rearing bed. However, Vijetha was distinctly superior in its efficacy against all four major diseases of silkworm. The study emphasize the role of bed disinfectants in silkworm rearing and the fact that they should be judiciously selected based on the efficacy of the bed disinfectant and the type of disease prevalent in a particular season and area.

• 유기물자원화
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• 제15권4호
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• pp.93-99
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• 2007

제지슬러지를 먹이로 공급하여 줄지렁이를 사육하면서 지렁이 사육상 높이 및 사육상내 개체군 밀도가 높아짐에 따른 줄지렁이 개체군의 수직분포를 사육상 표층으로부터 5 cm 간격으로 조사하였다. 줄지렁이 유충, 성충, 개체군의 50% 이상이 표층으로부터 5 cm 이내에 서식하였으며, 줄지렁이 유충, 성충, 난포 개체군의 96% 이상이 표층으로부터 20 cm 이내에 서식하였다. 사육상의 높이가 50 cm로 높아질 때까지 사육상 높이나 지렁이 개체군 밀도 변화가 지렁이 개체군의 수직분포 비율에 큰 영향을 미치지 않았다.

• 유기물자원화
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• 제25권3호
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• pp.79-89
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• 2017

경기도 포천시 관내 하수 및 인분 처리장들에서 발생하는 유기성 슬러지를 지렁이 먹이로 공급하였을 때, 지렁이 사육상의 수용성 양이온, 음이온 농도 및 pH, 전기전도도 등의 이화학 성상 변화를 추적하였다. 먹이로 공급된 슬러지의 pH, 전기전도도, 유기물 함량 및 함수율은 지렁이의 단기적 섭식이 가능한 범위였으나, 슬러지의 공급량이 늘어감에 따라 섭식속도가 느려지고 결국 지렁이 사멸현상이 나타났다. 또한 슬러지 공급량이 늘어감에 따라 지렁이 사육상이 산성화되었고, 전기전도도가 높아지는 것으로 보아 염류집적 현상이 일어난 것을 알 수 있었으며, 동시에 사육상의 수용성 음이온 및 양이온 농도가 높아졌다. 특히 수용성 이온 중 ${NO_3}^-$의 농도 집적이 두드러졌다.

• Journal of Biosystems Engineering
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• 제16권1호
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• pp.83-89
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• 1991

One of the most serious problems in Korean sericulture farms is to improve the adiabatic conditions for the simple silkworm rearing houses which has been widely adapted since early 1980'. Thus, this study is aimed to solve the problems by selecting the thermal screen material and by finding the method of its instalation. For the study, 4 kinds of materials which are (1) TE005,(2) NW60, (3) NW300 and (4) AL110 are selected and 4 different types of methods which are surrounding boundary of rearing bed(type A), surrounding inside of wall and ceiling (type B), installing on inside of wal ony (type C) and installing on ceiling Inly (type D) are installed. Decision criteria of the best combination of screen material and installation methods is made by calculating the heating load coefficients and by testing the application at the simple silkworm rearing houses. The obtained results are summarized as follows ; 1. The effect of thermal screen on reducing the thermal energy is remarkable. It saves energy more 50% than unscreened simple silkworm rearing houses. 2. From a stand point of a good screed material on thermal energy reduction, the NW300, AL110 and PE005 are recommanded materials. However, NW60 and PE005 are regarded as desirable materials from the practical point view. 3. Also, the effect on thermal energy reduction is largely affected by the method of thermal screen installation. The surrounding boundary of the silkworm rearing bed(type A) is the most desirable method to reduce the energy, which saves 56.6% of it. 4. In the practical application, NW60 and type A is considered to be the best combination of material and installation method. By this combination, the level of maximum heating load can be reduced at the rate of 43% for spring season and 40% for autumn season. 5. Another heating method, comparted heating, can be recommended to save the energy.

• 대한가정학회지
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• 제12권2호
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• pp.609-619
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• 1974

The purpose of this study is to survey Korean mother's child-rearing methods and to see what influence each layed on children's school achievement. To obtain data, a questionaire was given to 607 boys and girls, who were selected from both public and private middle schools in Seoul. The student were consisted of two distinct groups, namely superior and inferior. Five top students from each class were categorized as the superior group and five bottom ones from each class were categorized as the inferior group. The questionaire was consisted of 7 items, namely, the needing method, feeding period, weaning time, mothers general attitudes about crying, sleeping arrangement and whether mothers workers or not. Summary of this study is as follows ; 1. As far as babies were breast-fed, there was no significant between the superior group and the interior group no matter what feeding period and weaning time were. 2. When the babies were fed by milk or both by milk and breast, the most favorable weaning time for intellectual development seemed to be between 6 and 9 months after birth. 3. The mother's general attitudes to babies crying and the sleeping arrangement have definite influence on the children's school achievement. It was shown that if mothers hugged babies as soon as they cried the babies tended to be superior, but the mothers of inferior group had tendency to let alone, until the babies stopped crying or hug after finishing their urgent works. Then the superior group was allowed to sleep alone in his own bed in the mother's room. On the contrary, the inferior group was kept in their mother bed or that of other family's without being given his own bed. 4. Whether mother had a job or not did not had any influence on children's school achievement. 5. Korean mothers have tendency to hug their babies as soon as when they find them cry and feed them with breast milk. The study also shows that the mothers rearing attitudes has certain influencial effect upon the children's school achievement.

• 한국수산과학회지
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• 제10권4호
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• pp.275-279
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• 1977

전성장실험기간을 통하여 잉어의 먹이 섭취와 성장 및 사료효율은 스트레이너의 지소회수, 오탁된 사육수의 교환정도, 먹이의 분할공급의 회수, 적량내의 먹이 공급 및 용존산소량에 직접적이고 직각적인 반응을 나타내었다. 그러나 지소나, 물 교환을 위한 취급에는 별로 영향을 받지 않는 것으로 보였다. 특히 해로운 점은 식욕이 왕성하지 못할 때 먹이를 주는 일과 일시에 과량의 먹이는 주는 것이었다. 특히 직각적으로 삼킬 수 있는 량을 주면 물에 녹아나는 것이 거의 없고, 먹이를 준 후에도 물이 투명하지만, 그 이상의 먹이를 주면 식욕이 왕성할 때는 입속에 여분의 먹이를 머금고 삼킬 노력을 함으로써 녹아서 물에 흩어져 나오는 량이 많고, 먹이를 준 후 물이 혼탁해 진다. 그리하여, 여과조를 포함한 사육수질을 악화시키고, 성장이 불량해지고, 또 사료의 효율을 심하게 저하시킨다.

• 한국잠사곤충학회지
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• 제13권1호
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• pp.35-47
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• 1971

최근 외국에서 Virus성 연화병을 발견하였으며 본병으로 인한 피해는 다를 연화병보다 매우 심하였음을 밝혔다. 그러나 우리나라에서는 거의 발병여부조차 밝혀지지 못하고 있는 것이다. 그리므로 본 연구에서 Virus성 연화병이 발생하는가를 생물학적검정과 전자현미경 관찰로 구명하였고 가잠을 어떠한 불량조건으로 사육하였을 때에 유발현상이 나타나는가를 조사하였다. 그러고 연화병의 Virus와 연화병 잠체에 분리한 Bacillus spp의 세균과의 기동작용 및 Virus의 잠좌내감염방지에 대하여 실험을 하였다. 그 결과를 요약하면 다음과 같다. 1) 우리나라에서 Virus성 연화병이 발생하였으며 그 병원체인 Virus 입자는 구형이고 직경이 26~30m$\mu$이었음을 동정하였다. 2) 누에를 식상불족으로 인한 영양장해를 입히게 하거나 3~4 영기의 고온다습환경에서 사육하면 광의의 유발현상이 뚜렷이 나타냈음을 인정하였다. 3) Virus 또는 세균을 단독접종한 경우보다 혼합접종한 경우는 잠복기간이 짧고 발병율이 높은 결과를 얻어 Virus에 세균과의 기동작용이 이루워졌음을 인정하였다. 4) Virus의 잠좌내감염방지에는 소석회를 사용함이 효과적방법이 였음을 인정하였다.

• 아동학회지
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• 제29권1호
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• pp.115-131
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• 2008

Using the narrative method of qualitative research, this study of the puerperal period (6 weeks just after delivery) analyzed how mothers, after birthing their first child, changed from women to mothers. The survey of 8 mothers was implemented by personal interviews, talking on the phone, or chatting on the internet 5 to 7 times each over one year. Results showed that mothers first realized that they were changing from women to mothers by experiencing sudden physical changes through delivery and lactation and by such childrearing behaviors as feeding, bathing, and putting their child to bed. Mothers recognized this process was facilitated by relationships with others owing to their shared interest in the child.

• International Journal of Industrial Entomology and Biomaterials
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• 제18권2호
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• pp.57-61
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• 2009

Three years($2004{\sim}2007$) survey was conducted on the incidence of silkworm diseases namely, Grasserie, Flacherie, Muscardine and Uzi fly, a silkworm pest with 150 sericulture farmers in the districts of Chittoor and Anantapur in Andhra Pradesh. The data revealed that grasserie and flacherie incidence were maximum in summer season and minimum in winter season whereas muscardine was observed high in winter season in both the areas and rarely in rainy season in Chittoor and Anantapur districts. An improvement of 11.16 and 7.6 kg cocoons/100 dfls were recorded in the batches of PM xCSR2 Diseases free layings(Dfls) reared in rearing houses disinfected with 2% bleaching powder and Ankush, a plant based bed disinfectant applied as per schedule, respectively. The Uzi fly incidence was suppressed by 61.02% in batches where the integrated package was adopted for control of Uzi fly infestation.

• 한국잠사곤충학회지
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• 제42권1호
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• pp.28-30
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• 2000

Red muscardine (P. fumosoroseus), first observed on silkworm in Korea, was examined on its cultural characters, infection process, and symptoms. The fungus on PDA medium was grown to 44 mm in diameter in 14 days. Conidiaphore ws 1.45$\mu\textrm{m}$ in diameter, producing 4 to 6 phialides (5.9$\mu\textrm{m}$${\times}$1.8$\mu\textrm{m}$) in cluster. Elliptic conidia wre hyaline and 2.9${\times}$1.3$\mu\textrm{m}$ in size. Diseased silkworm showed typical symptoms of muscardine while becoming stiff. On 3 to 4 days after inoculation of P. fumosoroseus conidia upon the surface of silkworm, it was observed that the silkworm moved and ate less in rearing bed, and amorpnous dark spots of 1∼2 mm appeared on the surface o thorax, abdomen, spirace, and etc. Corrected mortality reached up to 97% at 9th day after inoculation.