| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Visi: Majalah Ilmiah Universitas HKBP Nommensen |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 44-55 |
| Abstraksi Narasi | : | The objective of research was to measure the capability of Enceng Gondok (Eichhornia crassipes) for removal of chrom metal from leather industry waste water. The ultimate result might be applicated for treatment of industrial waster water. Because in 72 hours of contact, the chrom concertration 10 ppm was reduced to 0.5 ppm (emision standard). Removal efficiency was 88,99% with average absortion rate was 0.78 ppm/day for initial chrom concentration 10.0 ppm. The absorption rate was close depend on the chrom concentration in waste water. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Visi: Majalah Ilmiah Universitas HKBP Nommensen |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 96-102 |
| Abstraksi Narasi | : | In the last decade, the world society has been more critical against environment destruction caused by industrial and agricultural sectors. Number of people consuming agricultural products produced without any chemical inputs rises significantly. Old Paradigm of high production by using chemical inputs has been critized hard and rejected,and new paradigm has been launched. It has been well known that the production of several world`s main crops has increased significantly in the last twenty years, and even in the last fourty years for wheat. This is due to the use of High Yielded Variety, advance agricultural technology in agronomy, and in agrochemical industries. However, scientific findings suggest that the extensive use of agrochemical products poses great danger to the environment. on the other hand, the amount of unarable land increases due to the rapid decrease of soil fertility. In many countries, such as Indonesia, some of high productive arable land has been used and will be used for other purposes, instead of using it for food production. The unpredictable climate has orten failed the agricultural production. Stress tolerance and low input variety seem to be one of the alternative answers to those problems. In order to discuss the prospect of those varieties, some idea behind and progresses achieved so far, those varieties, however, seem to have promises and good prospects. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Visi: Majalah Ilmiah Universitas HKBP Nommensen |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 66-82 |
| Abstraksi Narasi | : | This experiment was conducted to study, the growth of oyster mushroom in saw dust of Jeungjing (Albizzia falcataria) after sterilization. Doses of gamma irradiation were 0,10,20, and 30 kGy. The saw dust of Jeungjing was used as a substrate for mushroom media. The lime (CaCO3), gips (CACO4), rice-bran and chicken manure were added into the substrate. This experiment was conducted at P3TIR-BATAN laboratory, Cipanas Cianjur. There were two types of Jeungjing; fresh saw dust and deteriorated saw dust. The saw dust was then composted for 14 days with the addition of rice-bran, lime, gips, and chicken manure. Four hundred grams of compost (wet weight) was filled into plastic bag and sterilized in the autoclave growth shelf under the temperature 25-30 C and relative humidity 80-90%. Analysis were conducted on the substrate before and after composting, mushroom fruit and the residual compost of bag log after cultivation. Proxymate analysis of saw dust and residual compost of incubation, included, moisture content, ash content, total N-content, lipid, crude fiber, total sugar and C/N ratio. The results of these experiments revealed that different conditions of substrate (fres and deteriorated substrate) and the irradiation doses (10, 20, 30 kGy) affected the weight of mushroom production. The weight of harvested oyster mushroom in the range of 51-122.2 grams. The highest weight were obtained from the fresh substrate treatment at irradiation dose 30 kGy. while the lowest weight was obtained from deteriorated substrate and irrediation dose 10 kGy. The different conditions of substrate did not affect the total nitrogen content, and the lipid content of residual compost after incubation, while irradiation dose only affected the fiber content and C/N ratio of residual compost after incubation. The highest lipid contents was obtained from deteriorated substrate with autoclave sterilization, while the lowest one was obtained from deteriorated substrate with irradiation dose of 30 kGy. The starch contents of harvested oyster mushroom were in the range of 20.50-35.11%. The highest starch content was obtained from fresh substrate with irradiation dose of 20 kGy, while the lowest one was obtained from deteriorated substrate with autoclave sterilization. The biological efficiency of oyster mushroom was in the range of 31.95-63.94%. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Visi: Majalah Ilmiah Universitas HKBP Nommensen |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 83-95 |
| Abstraksi Narasi | : | This study was carried out to characterize the functional properties of milk protein i.e. water and oil absorption, emulsion properties, foam expansion and stability, iso electric point and gelation. This study was based on the factor mostly influencing the functional properties of milk protein. Statistical analysis used was completely randomized design with factorial. The result showed that casein absorbed water higher than skim milk, but oil absorption was not significant (p>=0.05). Emulsion properties was affected by pH. Emolsion activity increased as pH increased. Foam expansion was affected by salt concentration significantly (P |
| Nama Pengarang | : | Jongkers Tampubolon, Benika Naibaho, Idrus Kadir, E. Surwadji, Rosalina, Sabam Malau, Bangun Tampubolon, Hasan Sitorus, Maria R. Sihotang, T. Sihol Nababan, Samse Pandiangan |
| Nama Majalah/Jurnal | : | Visi: Majalah Ilmiah Universitas HKBP Nommensen |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 1-14 |
| Abstraksi Narasi | : | Multiple employment in agricultural sector is a world wide phenomenon which causes controversy. There are two contrasting theses in this controversy: one opinion looks at the multiple employment as a temporary situation, in which the farm household is facing a transition process before entirely leaving out the agricultural sector i.e. farming. The other opinion claims that multiple employment is persistent. This different views bring about conflicting implication in the formulation of development policy. This article describe the nature of multiple employment in the peasant community of North Sumatera. It shows that multiple employment is a complex phenomenon, so that the stylized fact of development stage from agriculture through industry to services based economy is not applicable lineary. It occurs due to disregard of general facts that exist in peasant community. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Visi: Majalah Ilmiah Universitas HKBP Nommensen |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 1-18 |
| Abstraksi Narasi | : | Indonesia government has made many efforts to develope tourism industry in purpose of increasing the revenue of government itself and community, creating job opportunities and businesses, introducing the culture of nation wideworld and tightening the relationship among the nations. The efforts to develop destination areas of tourism at Parapat city and how to increase the income of community as well as to develop the tourism industry were some of the problems faced by local custom that community always depend on. The research, that had been conducted, got result of coefficient correlation (r) 0,82** or coefficient determination (r^2) 0,7**. It means that the tourism development has a big impact to the income of the community. To ensure the growth of tourism and the reliability of tourist destination areas, the government needs to inform the community about tourism awareness and to create favorable condition and not only focusing on natural beautifulness. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Visi: Majalah Ilmiah Universitas HKBP Nommensen |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 19-34 |
| Abstraksi Narasi | : | In order to maintain self-sufficiency in foodstuffs and increase farmers income, the policy of food diversification is an important break-through program. Food diversification is not only intended to decrease Indonesians dependence on rice but also to promote food quality in order to increase quality of human resources. Efforts to sustain-self-sufficiency in foodstuffs should be related to food diversification in terms of sources, methods of processing, and the way they are served. Therefore, increasing people`s knowledge can not be separated from the program of nutrient and food. For the future, food stock and supply should be directed to foodstuffs that contain more protein and vitamin. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Visi: Majalah Ilmiah Universitas HKBP Nommensen |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 92-106 |
| Abstraksi Narasi | : | River is one of the most important water sources among the surface water of earth. Therefore, the understanding of the river pollution problem will be very necessary to be possessed. From this research, it is stated that the industries which throw their waste product to the River Deli, result the BOD about 330 ppm and the COD about 470 ppm. In addition of this statement, it has contravened the government regulation by number 20 in 1990; whereas, the water of the River Deli in which the degree of its quality receives the BOD, really fluctuates from 13 ppm to 159 ppm and the COD fluctuates from 12 ppm to 273 ppm. It is really influenced by the river which is not constant and also depends on season. Finally, the degree of quality and the water pollution of River Deli-in the class I, II and III are really dependent upon the discharge of water in the river and at the time when the waste water is thrown by factories to the River Deli. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Visi: Majalah Ilmiah Universitas HKBP Nommensen |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 73-91 |
| Abstraksi Narasi | : | Peranan industri surat-surat berharga untuk mendorong pertumbuhan ekonomi dirasakan sangat penting dalam sistim keuangan masa sekarang. Industri surat-surat berharga melakukan berbagai kegiatan-kegiatan seperti bank investasi, perantara (agen), dan bursa. Semua kegiatan ini telah menarik berbagai lembaga yang membutuhkan modal dan menarik para investor yang mau menanam uang mereka, untuk berpartisipasi di dalam industri. Kemudian, masing-masing pihak yang berperan dalam industri akan mengharapkan hasil atau akan menderita kerugian akibat pembelian dan penjualan surat-surat berharga. Tulisan ini menitikberatkan ulasan tentang tujuan singkat perusahaan surat-surat berharga di Amerika Serikat. Dengan meninjau perusahaan ini, akan diberikan sedikit informasi tentang keikutsertaannya dalam kegiatan ekonomi. Pembahasan akan didasarkan pada struktur industri, pembelanjaan pemasaran, kecenderungan pasar dan globalisasi. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Visi: Majalah Ilmiah Universitas HKBP Nommensen |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 35-49 |
| Abstraksi Narasi | : | This research was conducted to investigate some factors causing the failure of prawn (Penaeus monodon) culture production in brackish water ponds. This research was conducted in Pangkalan Susu, Stabat, Belawan, Percut, Sialang Buah, Bedage, Kuala Tanjung, and Batubara in 1993. The result showed that the failure of prawn culture production in the brackish water ponds was not significantly influenced by water temperature, water pH, water salinity, disolved oxygen content in water, soil pH, pond depth, the length of pond bottom drying, and prawn density. However, the failure of prawn culture production in brackish water ponds could be influenced by some factors i.e.: (1) the attack of pathogen microorganisms (bacteria, virus, fungi and protozoa, (2) soil organic matter content was high, (3) pond bottom soil texture was sandy clay, (4) the pond bottom could not be dried perfectly, (5) water quality in pond was low (ammonia, H2S, and organic matter in water were high), (6) the change of water in pond was non-existent, (7) prawn density was too high (400,000 individual per ha pond) and (8) the farmers did not have enough skill to culture prawn. |
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