| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Meditek: Jurnal Kedokteran |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 53-62 |
| Abstraksi Narasi | : | Memory is the most essential cognitive process. For the largest part of this century, the neurologist categorized memory in psychology and phylosophy domains. Beginning in the last two decades, the neuroscientists acquired better insight about the relation between cognitive process and the structure of brain activity during the memory process have not been done extensively. This report is a review on how the activity can be monitored/detected. Memory is usually started with sensory impuls. Beginning within the sensory receptor, impuls will enter the memory circuit consisted of limbic system, diencephalon, basal forebrain cholinergic, cerebral cortex, and cerebelum. Impuls transmission and memory storage of short-term memory take place through limbic system while non-cognitive memory does not take place through this system. All of this processes involve the bioelectric activities that characterize the neuron activities. Thus the factor affected the neurotransmitter work as well as neuron activity would also affect the memory processes. Bioelectric activity that happened during short-term memory process would bring about a potential fluctuation on the body surface. Such fluctuation may oftenly be tapped on the scalp surface, among others by electroencephalography. The result can be expected to be good parameters for monitoring/ detecting the short-term memory process in human. By comprehending the matters related to short-term memory process, it is expected that further study can be performed on (a) factors that affected memory, (b) factors that would disturbed memory, and (c) attemps to improve memory. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Meditek: Jurnal Kedokteran |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 10-23 |
| Abstraksi Narasi | : | The bonding modes of Fe (II), to 1,10-phenanthroline (Phen), 4,7-Dimetyl-1,10-Phenanthroline (DMF), and 4,7-Diphenyl-1,10-Phenanthroline (DFF) are studied through their typical ligan and complexes spectra. The ligan spectra in ultraviolet region confirm the bond in the complexes, which come from the donation of lone pairs electrons of ligan to vacant d orbital of metal. Batochromic shifts due to widenned conjugation are hapenned because the metal joins the ligan phi system. The broad shoulder shape spectra in visible region which exhibit distinct high molar absortivity are very typical for this class of complexes. The spectra differenciate them from the usual d-d transition. The intensely coloured complexes are due to electronic transition of t2g --> eg* (MLCT: Metal Ligan Charge Transfer). The maximum peak for each complex is 510 nm for Phen complex, 513 nm for DMF complex, and 530 nm for DFF complex. Complexation will further stabilize the t2g level of this low oxidation number metal. The stoichiometry of complexes which are done by mole ratio methode give identical result for each ligan, that is Fe(Phen)3 to 2nd+, Fe(DMF)3 to 2nd+, Fe(DFF)3 to 2nd +. The substituen effect of group number 4 and 7 in Phen stucture to the bonding energy of complexes are proved by the linierity realtion between exitation energy and Hammet parameter for each group. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Meditek: Jurnal Kedokteran |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 24-37 |
| Abstraksi Narasi | : | In anthropology perspectives, the health of human being is like a cultural construction in which it covers men`s adaptation in facing the social and physical environmental changes. In other words health is an integral and holistic part of life. Thus illness and death are unvoidable in human`s life. Through its culture people exploit their capacity, natural resources and their social relations to reach and defend the good health. In practice every culture has its own ways in responding to health and death problems. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Meditek: Jurnal Kedokteran |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 38-46 |
| Abstraksi Narasi | : | Lamtoro or leucaena leucocephala is one of the plants which can be used as supplement of fresh meal on dry long summer, due to its characters easy to find and survive againts the draught. This plants has high nutrient value and the livestock like to eat it. But the alkaloid mimosin in the lamtoro is affected the usage has to be limited. The knowledge of limitation of lamtoro up to save side is very limited, especially the effect to the reproductive organ of mice. This experiment does not intend to know the changing which occur to the reproductive organ of female mice due to feed by lamtoro leaf in order to avoid the negative effect. The result indicated that feeding by lamtoro leaf, significantly causing damage on ovarium. The worst damage at more than 10% level of lamtoro leaf diet. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Meditek: Jurnal Kedokteran |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 1-9 |
| Abstraksi Narasi | : | High prevalence of HIV/AIDS in Indonesia, especially in big city like Jakarta, is concordance with people`s social behavior. In recent years, the norms of people is changing due to rapid flow of information. Values, customs, norms and traditional habits are changing and being replaced by exclusive free behaviour. So to speak, the people`s behaviour is very much influenced by current socio-cultural changing nowdays. HIV/AIDS in this context is considered as logic consequences which has to be accepted by the people who have left the traditional culture well accepted. |
| Nama Pengarang | : | Donna M. Pasaribu, Felix Melchizedech Mesak, Trubus, Rudi Nuriadi, Rina Priastini S, Trubus, Jimmy Lumanau, Adelina Simamora, Indriani K. Sumadikarya, Angelheart Joy Maynard Rattu |
| Nama Majalah/Jurnal | : | Meditek: Jurnal Kedokteran |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 63-72 |
| Abstraksi Narasi | : | Medical potency in Chromobacterium violaceum (Cv) is not well recognised and not widely publised. The only medical potencies which have reknowed yet are as follows: production of some antibiotics, antitumor substances and septicaemia effect in laboratory animals and human subjects as well. This basic research has been done to understand further these medical potencies using molecular biology method, by means of in vivo mutagenesis system, for detecting the behaviour of related genes, for the first step, optimizing in vivo mutagenesis on Cv by using transconjugated element of Tn916, was performed. And this is the objective of this study. Resistancy against certain antibiotics is used as genetic marker. Cv is still sensitive to various antibiotics, except ampicilin. A spontaneous mutation was generated to produce Cvfr` strain and this strain is used to be conjugated with rifamfisin selection marker. Tranconjugation frequency of Tn916 into genom is 2.5 x 10to -5th. But as the recipient selection marker which was used is ampicilin, a strong suspect is being made that real number is higher. This was caused by the non-expressive effect of violet pigment by Cv in DNA-electrophoresis. Donor colonies was difficult to be differentiated, and the condition will be worsened, if ampicilin is furtherly degraded by Cv, which can caused the development of donors. In this study, isolation of plasmid for the purposed of plasmid typing was done. And one of the result is Cv has no plasmid as clearly shown in electrophoresis method. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Meditek: Jurnal Kedokteran |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 12-20 |
| Abstraksi Narasi | : | Fiber Optics communication technology has been developed since 1970 following the discovery of guidance techniques of capital wave in silica fiber with very small diameter. From 1970 to 1979, the transmission damping of optical signal has been reduced drastically from 20 dB/km to 0.2 dB/km so that it can be used to transmit optical signal up to 100 km without repeating. Other improvements or the communication system performance of the fiber optics were the quality improvement of its optical signal resource and the development of optical integrated circuits. Other fundamental improvements in obtaining better performance were the development of coherent/heterodyn communication system. The developmant of communication system as a whole comprises of widespread technological aspects such as microcomponent fabrication technique, thin layer, microelectronics, microoptics, semiconductor, and telecommunication and information technology, including "state of the art" of the development of optoelectronics integrated circuit. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Meditek: Jurnal Kedokteran |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 21-28 |
| Abstraksi Narasi | : | One of the computer applications is in the field of measurement. The computer function reveals a terminology known as intelligent instrument. What is intelligent instrument? Is the intelligent able to improve the quality of measurement results? If it is, how can it be? These matters will be discussed in the following paper. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Meditek: Jurnal Kedokteran |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 39-58 |
| Abstraksi Narasi | : | One of the speech enhancement application is the reduction of noise in speech to improve the performance of vocoders, and improvement of normal impaired hearing. The problem of enhancing speech degraded by additive noise has received considerable attention in the literature since the mid-1970s. As a result, a variety of approaches to speech enhancement have been investigated. One approach which has been considered in detail by Frazier is an adaptive comb filtering technique that is based on the observation that waveforms of voiced sounds are periodic with a period that corresponds to the fundamental frequency. In this thesis a test was performed for enhancement of speech degraded by additive noise. The test included the speech quality assessment for the subjective MOS test and objective quality measurement. Results indicate that the adaptive comb filtering scheme does increase the signal to noise ratio (SNR) due to improving of the speech quality. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Meditek: Jurnal Kedokteran |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 59-70 |
| Abstraksi Narasi | : | In the industrial world there are many cases of controlled system that can be found such as plant characteristics, which cannot be well defined, so that it impedes in getting the exact and real numerical parameters for the designing purposes. Many factors involved in this case, for instance non-linearity, variables that change in time, or inappropriateness and inaccuracy in measurement. The success of the fuzzy logic application in control field makes it a better strategy in control system application, especially in non-linear system. This makes the fuzzy control becomes an alternative problem solving in control field. |
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