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Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences
Published by Universitas Brawijaya
ISSN : 20875517     EISSN : 25274376     DOI : -
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
The Journal of Tropical Life Science (JTLS) provides publication of full-length papers, short communication and review articles describing of new finding or theory in living system, cells and molecular level in tropical life science and related areas. The journal publishes articles that report novel findings of wide Tropical Life system phenomenon in the areas of biodiversity, agriculture, fisheries, health, husbandry, forestry and environmental technology. JTLS has 1 volume with 3 issues per year.
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Articles 5 Documents
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Search results for , issue "Vol. 1 No. 2 (2011)" : 5 Documents clear
The operation and production in Penaeid farm: mini review ludi parwadani aji
Journal of Tropical Life Science Vol. 1 No. 2 (2011)
Publisher : Journal of Tropical Life Science

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Abstract

Penaeid prawn demand in the world market has brought about a dramatic raise in the price of prawns, so, the aquaculture prawn industry also increase. Prawn farming can be divided by intensive, semi intensive or extensive culture system. Extensive culture system has low stocking densities, whereas, intensive culture (very high stocking densities) has highest level of environmental control such as recirculation system and stable ecological system. Predation and disease is the major obstacles in culture system. To deal with predation, farmers use net for covering the ponds and fencing the ponds. Disease organism such as parasites, bacteria, fungal and viruses may be eliminated through sterilization of the water. The commercial diets made from squid and white fish meal may replace fresh diet in semi-intensive culture as fish diet has a problem with preservation. Moreover, maintaining water quality such as dissolve oxygen, pH, nitrogen (ammonia and ammonium) and temperature is very important to support productivity and profitability in prawn farming. The most prominent aims at harvest are to pack the prawn in a way that avoids physical damage, minimize the quantity of prawn left on the bottom of pond, and directly chill prawn. Therefore, good management of water quality, feeding, disease, predation, and harvesting is important in prawn culture.Keywords : penaeid, prawn, culture, production, water quality
Introduction of Pack Test for Participative Environmental Monitoring and Environmental Education for Sustainability in Malaysia Muhammad Faiz Bin Abd Rahman
Journal of Tropical Life Science Vol. 1 No. 2 (2011)
Publisher : Journal of Tropical Life Science

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Abstract

Pack Test which provided by Kyoritsu Chemical-Check Lab. Corporation has been assumed as a professional easy-to-use onsite water quality checker. The aim of this study is to examine the possibility of application of Pack Test in Malaysia, and to assess the required matters during introduction processes. Two workshops were sampled to prove the potential function of Pack Test in environmental education and participative environmental monitoring. Two hours lecture of Universiti Teknologi Malaysia (UTM) was facilitated as a workshop by author on September 23, 2010, and then the author has assisted a workshop in Putrajaya on October 9, 2010. Questionnaire forms were applied to test as if peoples feeling are positive or not towards Pack Test as preliminary research. Water quality parameters were simultaneously measured by Pack Test, such as, COD, NO3-, CI-, and NH4+ in UTM, pH and NO3- were measured in Putrajaya workshop, respectively. Participant’s feeling in the both workshops showed strong positive potential for Pack Test. Results of water qualities from UTM workshop had big variation in COD and NO3-. Considering the reason, the UTM workshop was conducted without proper support for both facilitator and participant. Participants were able to classify the water quality level in a short time. As for the Putrajaya workshop, with deep support and well skilled instruction by facilitator team, the data showed small variation i.e. good and consistent water quality result. It was obvious that Pack Test was always applicable to assess water environment and it was well functioned as user friendly easy-to-use water quality checker. Thereby the role of Pack Test was segregated from conventional standard methods. The participant’s feeling to Pack Test was strong positive for implementation and to improve public environmental awareness. Simultaneously, they were feeling that peoples can participate more effectively in water environment issues by Pack Test. It was clear that Pack Test was notable in-situ water quality checker, which has advantages over its particular methods that never rely on transport of samples to a distant laboratory for chemical analysis. Above all, it could be a breakthrough point to empower public participation, and environmental education for water sustainability. In addition, it can be pointed out that if there are chance to get skilled of the usage of Pack Test, which will be important for teachers, engineers, and other potential facilitators to ensure the effective usage of Pack Test towards.Keywords: Environmental awareness,Public participation, Simplify environmental monitoring tool, Strategic environmental assessment, Water quality 
Effect of Dietary Amorphophallus sp From East Java on LDL-C Rats (Rattus novergicus Wistar Strain) Nunung Harijati; Sri Widyarti; Rodiyati Azrianingsih
Journal of Tropical Life Science Vol. 1 No. 2 (2011)
Publisher : Journal of Tropical Life Science

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Abstract

One of indication of obesity is high LDL-C . Obesity has serious risk to health, it can cause heart disease and stroke. Effort to lower obesity using drugs have significant side effects such as insomnia, increased blood pressure, dry mouth and so forth. Therefore using natural products that contain glucomannan to reduce obesity and LDL-C is good choise. Glucomannan in the global market derived from Amorphophallus konjac. In this study, we used glucomannan from Amorphophallus endemic East Java to reduce fattened Wistar rats. Amorphophallus that used include Amorphophallus muelleri, A.variabilis (variant: Brongkos 32; Brongkos 5; Wonorejo, Brangsi) and Amorphophallus campanulatus (Var Selopuro). Amorphophallus diet was given to white rats of Wistar strain that previously fattened using a mixture of cholesterol and lard, in addition to PARS (Chicken Feed Race Super) as a basic food. Amorphophallus konjac was used as control. Measurement of LDL-C was conducted in four different time points, namely 1). Prior to dietary cholesterol, 2). 24 days after the dietary cholesterol, 3) 11 days after Amorphophallus (+cholesterol) diet, 4). 25 days after Amorphophallus (+cholesterol) diet. The results showed that the diet of A.variabilis potentially lowered blood cholesterol levels for their respective 22.98%, 5.85% and 7.37% for consecutive variant Brongkos 32; Brongkos 5; Wonorejo. Diet from A.campanulatus and A.konjac had not been able to reduce cholesterol to the end of observation (25 days).Keywords: LDL-C, A.variabilis, A.muelleri, A.campanulatus, A.konjac
CD4+CD25+FOXP3+ Regulatory T Cells In Allogeneic Hematopoietic Cell Transplantation Young-Ho Lee; Muhaimin Rifa'i
Journal of Tropical Life Science Vol. 1 No. 2 (2011)
Publisher : Journal of Tropical Life Science

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Abstract

CD4+CD25+FOXP3+ regulatory T cells (Treg) require activation through the T cell receptor for function. CD4+CD25+FOXP3+ regulatory T cells are believed to be key players of the immune tolerance network and control the induction and effector phase of the immune system. Although these cells require antigen-specific activation, they are generally able to suppress bystander T cell responses once activated. This raises the possibility that antigen-specific Treg may be useful therapeutically by localizing generalized suppressive activity to tissues expressing select target antigens. Treg can exert a potent suppressive effect on immune effector cells reactive to host antigens and prevent graft versus host disease (GVHD) in allogeneic bone marrow transplantation (BMT). Here, we observed that co-transfer of CD4+CD25+FOXP3+ T cells derived from donor type along with the donor bone marrow cells could control GVHD-like reactions by suppressing effectors cells of host responding to the donor hematopoietic compartment, and resulted in prevention of autoimmunity and rejection. We further demonstrate that CD4+CD25+FOXP3+ regulatory T cells can control immune-based morbidity after allogeneic BMT by suppressing the development of granulocytes cells and increasing the level of B cell expression. Keywords : Bone Marrow Transplantation, Regulatory T cells, CD4+CD25+FOXP3+
Influence of Porang (Amorphophalus muelleri) Cultivation On The Composition of Soil Arthropods In Tropical Agroforestry Areas In East Java, Indonesia Amin setyo Leksono; Bagyo Yanuwiadi; Kusuma Zaenal; Akbar Farid; Fujianor Maulana
Journal of Tropical Life Science Vol. 1 No. 2 (2011)
Publisher : Journal of Tropical Life Science

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Abstract

This research was conducted on July to October 2010 to evaluate the effect of porang cultivation on the abundance, diversity and composition of soil Arthropods. Change in the abundance, diversity and composition of soil Arthropods was observed using pitfall traps in two study sites (Jember and Madiun). In each study site, samplings were performed in porang cultivation land and non-porang area. A total of 15 traps were put in three lines at each location. The differences in the abundance and diversity were analyzed by using multivariate analyze tests. The soil Arthropod compositions in all locations were compared with Bray-Curtis similarity index. The effect of environmental factors on the arthropod compositions was analyzed using multiple regression. The result showed that the effect of porang-cultivation was not consistent in two study sites. In Madiun, the abundance of soil Arthropods in porang cultivation land was slightly higher than that in non-porang, while the diversity was significantly higer in the former location. In contrast the those in Jember was found in vice versa situation. This study indicate that the effect of porang-cultivation was not subtantial to the composition of soil Arthropods. Therefore practice non harmful porang cultivation should be promoted as a part of agroforestry sistem in both study sites.Keywords: Agroforestry, conservation, pitfall traps Soil Arthropods composition

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