• International Journal of Industrial Entomology and Biomaterials
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• 제8권1호
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• pp.81-87
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• 2004

In order to investigate the effects of supplementary nutrients on silkworms, Bombyx mori, an experiment was conducted with ascorbic acid treatments. Dietary supplements of ascorbic acid 1, 2 and 3% were fed to silkworm larvae through 1st to 5th instar, The larvae were fed by mulberry loaves of Kokoso variety and the supplementary loaves were used once a day. These treatments resulted in a significant increase of biological parameters such as larval weight, the rate of food consumption and the approximate digestibility of the food. But the economical parameters such as cocoon weight and cocoon shell weight didnt show considerable difference compared to control. Dietary supplement of 2% ascorbic acid increased the larval weight by 7.8% and reached to 1.065g, which had the highest weight increase in the fourth day of 4th instar larvae. The percentage of daily weight increase in this group of larvae (79.01%) had significant difference compared with other treatments. The nutritional efficiency index in this group of larvae was better than others. Also the abundance of biochemical macromolecules such as glucose, cholesterol, triacylglycerol and urea in haemolymph of larvae fed by 2% ascorbic acid increased to become 29.75 (mg/㎗), 24 (mg/㎗), 75.4(mg/㎗) and 32.1(mg/㎗) respectively. But protein contents of haemolymph of larvae in each treatment were not significantly different. Since all the results achieved were not considerable either statistically or economically, this method could not be recommended to improve the sericultural parameters.

• Journal of Dairy Science and Biotechnology
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• 제35권4호
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• pp.262-265
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• 2017

Bombyx mori (silkworm pupae) is a unique and biologically significant insect, which is a recognized source of high quality protein that provides all the essential amino acids required for human health. Recently, many studies have focused on various biomedical applications of B. mori proteins. The purpose of this study was to manufacture protein-fortified kefir containing different concentrations of B. mori powder according to pH and sensory evaluations. The value of the protein-fortified kefir increased but the pH decreased with increasing incubation time, indicating that the amount of B. mori powder did not affect and pH. Addition of B. mori powder also did not affect the sensory properties of overall acceptability, texture, and color compared to control group without addition of B. mori powder. However, flavor and taste were affected by increasing the amounts of B. mori powder, with a significant difference in both flavor and taste between the control and treated groups (both p<0.05). There was no significant difference in overall acceptability, texture, and color. Further studies are needed for producing kefir as a dietary supplement utilizing the functional properties of B. mori.

• International Journal of Industrial Entomology and Biomaterials
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• 제8권1호
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• pp.1-15
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• 2004

Due to recent scientific innovations in mulberry cultivation, leaf yield has been increased manifold. However, with successive leaf harvest, a quantum drop in leaf yield and quality has been noted. This inturn has affected the silkworm rearing and farmers suffered by the frequent crop failures. This is mainly due to nutrient deficiencies in mulberry leaf. Moreover, no complete information is available about hunger signs of nutritional disorders, analytical diagnosis and critical levels of nutrients required. The present paper, thus, may serve as an important nutrient guide for identification of hunger signs, leaf nutrients status under deficiency and critical levels of the elements namely N, P, K, Ca, Mg, S, B, Cu, Fe, Mn and Zn requirements for higher leaf yield and quality. The leaf nutrient status provided may help chemist for correcting the soil status. Besides, an integration of mulberry intercropping with legumes and applications of neem and castor oil cakes, VA-mycorrhizal inoculation, biofertilizer and vermicompost are suggested as integrated nutrient management for sustainable sericulture industry. Based on the information described in this paper, a model needs to be framed for maintaining continuous supply of nutrients to obtain desired quantity and quality of mulberry leaf for successful silkworm cocoon crop and increasing overall silk productivity.

• Journal of Nutrition and Health
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• 제12권2호
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• pp.65-74
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• 1979

In order to observe the contents of some essential amino acids in Korean foods, total and free tryptophan, and available lysine in fifty kinds of Korean foods were analyzed by the sfectrophotometry. The results obtained are summarized as follows : 1) The tryptophan contents per 100g of soybean, wet green laver and skim milk were over 250 mg, and the contents Per g nitrogen in ginger, dried persimmon and chestnut were over 150 mg. 2) The free tryptophan contents per 100 g of soybean, small red bean, dried persimmon, ginseng stem were over 100 mg, ana the contents per g nitrogen in dried persimmon was over 150 mg. 3) The available lysine contents Per 100g of soybean, wet green laver and skim milk, fish(auchovy), dried yeast, casein and silkworm pupa were over 1000 mg, and the contents per g nitrogen in potato, perilla(wild sesame), red pepper, sausage and skim milk were over 300mg. 4) The contents of tryptophan and available lysine in soybean, green laver and skim milk were higher than in other samples. 5) In general, the contents of tryptophan and available lysine were abundant in seaweeds.

• 한국식품영양과학회지
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• 제46권3호
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• pp.289-297
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• 2017

본 연구는 고지방식이로 유도된 제2형 당뇨 동물모델에서 잠상산물의 항당뇨 및 지질개선 효과를 규명하기 위하여 C57BL/6N 마우스에 14주간 잠상산물 분말(ML, SK, MF, CT)을 급여한 후 제2형 당뇨의 임상적 지표 및 인슐린 신호 전달체계에 미치는 영향을 분석하였다. HFD군보다 잠상산물을 급여한 군들의 체중증가량이 감소하는 경향이었으며, 혈장 포도당 및 인슐린 농도는 HFD군보다 ML분말을 급여한 군에서 특히 감소하였다. 혈장 T-C 농도는 HFD군에 비하여 ML과 SK 분말 급여 군에서 유의적으로 감소하였으며, 혈장 HDL-C 농도 및 HTR은 HFD군보다 ML군과 SK군에서 현저히 증가하였다. 간 조직 지질 농도는 HFD군보다 잠상산물을 급여한 네 군 모두에서 TG와 T-C 농도의 유의적인 감소가 나타났다. 이상의 결과 잠상산물 중 ML분말이 혈장 포도당, 인슐린, T-C 및 TG 농도를 가장 효과적으로 감소시켰으며, 혈장 HDL-C 농도 및 HTR은 증가시켰다. 또한, 내장지방 조직의 AKT, S6K, 그리고 AMPK의 활성도 증가시킨 것으로 보아 고지방식이에 의한 인슐린 저항성 및 지질 대사를 개선한 것으로 생각된다. 향후 ML의 인슐린 저항성 개선 효과에 대해 더 깊이 있는 기전연구가 수행된다면 제2형 당뇨환자를 위한 건강기능성 식품으로 개발될 수 있을 것으로 생각한다.

• 한국잠사곤충학회지
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• 제17권2호
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• pp.141-149
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• 1975

개양 Mulching에 의한 조기재배 담배밭 부근 뽕잎이 추잠작에 미치는 영향을 알고자 뽕나무 pot 100m구를 대조로 하여 10m, 20m, 40m, 60m 구별로 담배밭으로부터 동북쪽에 배치하였으며, pot가 배치된 밭의 경사는 담배밭과 근접된 지점은 담배밭 보다 지반이 40cm 내외로 낮았으나 담배 밭에서 멀어질수록 10％ 내외 경사로 점점 높게 위치하고 있었다. 한편 담배밭은 전 면적의 1/2 정도를 동남방향에서 서북방향으로 나누어 남서편은 10％ 미만의 경사로 점점낮게 위치하고 있었다. 오독처리 기간중의 풍향은 동남풍아 36％로 주풍 이었고, 남서풍이 21％, 남풍이 16％, 기지의 순이었다. Pot는 담배 하엽수확 완료 후부터 상엽수확 완료 직전까지 32일간을 경합시켰으며 경합기간 중 신장된 뽕은 pot격리 후 33일째인 4령말기부터 상업전까지 11일간에 걸쳐 급여시험한 결과를 분석한 각각의 계량형질에 미친 영향을 요약하면 다음과 같다. 1. 5령경과는 10m구부터 40m구까지 같은 수준으로 대조보다 길었으며 60m구는 대조와 유의차가 없었고 전령경과도 대체로 같은 경향이었다. 2. 5령기잠 지면잠비율은 10m, 20m구단이 가장 높았고, 기타구는 대조와 유의차가 없었다. 3. 장잠감잠비율은 60m구까지 피해가 인정되었다. 4. 화용비율은 10m구에서 20m구까지가 가장 낮았으며, 기타구는 대조와 유의차가 없었다. 5. 전견중, 견층중은 각각 60m구까지 피해가 인정되었으며, 전견중 보다는 견층중의 피해가 크므로서 그 결과, 견층비율 역시 같은 경향의 피해를 보였다. 6. 수견량(대 소잠 1만두 옥견포함)에서는 담배밭에 가까운 구 일수록 대조에 비해 현저히 감수가 되어 고도의 유의차가 있었고 60m구는 대조와 같은 수준이었다. 단, 실제 수견량에 있어서는 10m, 20m, 40m, 60m구는 각각 7kg, 3.9kg, 3.6kg, 1.8kg으로 잔수되어 그 피해율은 40％, 26％, 24％, 12％로 감수된는 경향을 나타냈다. 이상을 종합하여 볼때 수견량과 견층의 피해거리는 60m 이상까지 있는 것으로 사려된다.

• International Journal of Industrial Entomology and Biomaterials
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• 제10권1호
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• pp.19-24
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• 2005

Nutrition is very essential for growth, development and reproduction. The quantitative impetus of nutritional factor on adult characters and reproductive fitness was studied in Antheraea mylitta by providing fresh leaves of Terminalia tomentosa for 1 to 4 times a day to $5^{th}$ instar larvae. All the characters have improved on giving fresh diet more times over the single diet. The adult weight has strong effect on the reproductive potential i.e., female pupa and moth weight, survivability, pupation rate, emergence percentage, fecundity, fertility, egg weight and hatched out larval weight. The improvement recorded to the tune of $70\%,\;77.1\%,\;115.4\%,\;36.7\%,\;45.9\%\;and\;218.3\%$ in larval weight gain, survivability, pupation rate, female pupa weight, moth weight and fecundity respectively when fresh diets were provided 4 times a day against single diet. The adult emergence percentage has increased from $66.4\%\;to\;96.2\%$ and fertility rose from $52.2\%\;to\;93.6\%$. The weight of eggs and the larvae hatched out of it also found to be significantly higher in 4 diets a day condition. The study revealed that optimization of fresh diet frequency should be maintained to obtain higher egg production and fertility in order to get vigorous larvae to continue the generation.

• 한국식품영양학회지
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• 제9권4호
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• pp.496-499
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• 1996

기능성 다이어트 식품을 개발을 목적으로, 키토산 과견 피브로인의 복합체를 만들고 성질을 조사하였다. 키토산은 대동새우로부터 추출하였고, 견사 피브로인 섬유는 누에로부터 추출하였다. 견사의 특성을 알아보기 위하여 용해도를 조사한 결과, 용해도는 8M Libr 이상의 농도와 4$0^{\circ}C$ 이상에서 가장 높았다. 견사 피브로인의 아미노산 조성은 천연견사 및 용해시킨 피브로인과 같았다. 키토산, 견사 피브로인 복합체의 아미노산 조성은 glycine, alanine, serine, tyrosine, threonine 및 glutamic acid 순서로 많았다. 또한 IR 스펙트럼 결과, 키토산.견사 피브로인 복합체는 배합비율에 따른 스텍트럼상의 차이는 거의 없었다.

• 한국식품과학회지
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• 제54권1호
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• pp.88-93
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• 2022

In this study, silkworms fed Cudrania tricuspidata leaves were powdered, and hydrolytic enzymes, including viscozyme, papain, and flavourzyme, were added to verify the functionality of the different mixtures. In the general component analysis, the C. tricuspidata silkworm (CS) group exhibited higher crude protein and ash content than did the other groups, and the enzyme-treated groups exhibited higher carbohydrate content than the CS group. The DPPH and ABTS radical scavenging activities were significantly higher in the CS treated with viscozyme (CSV) and the CS treated with viscozyme/flavourzyme (CSVF) than in the other groups, with the CSV group showing the highest reducing power. ACE inhibitory activity was significantly higher in the CS treated with visocozyme/papain (CSVP) than in the CS group. In conclusion, rather than using powdered silkworms fed C. tricuspidata leaves, it would be more effective to use hydrolysates from C. tricuspidata silkworms as raw materials for functional foods.

• International Journal of Industrial Entomology and Biomaterials
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• 제9권1호
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• pp.15-28
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• 2004

The supplementation of mulberry leaves, with the aim of yield, enhancement using vitamins, minerals and other compounds have generally been attended from 1990s and many researches have been conducted. More than 30 different compounds from complementary nutrients have been analyzed and in different regions where different climates various results have been achieved. This review has attempted to discuss the results of different works on enrichment of mulberry leaves with supplementary compound. Generally the most effects of these compounds are in the regions where productive parameters are low. In the areas that follow a normal pattern in economical parameters the enrichment of the leaves havent have significant economical effects.