Fish of Selais Bungkuk (Hemisilurus heterorhynchus) is one of the catfish in Riau which has high economic value currently becomes endangered. The purpose of this study was to aimed to examine biological reproduction aspect of H. heterorhynchus which included body length distributon of fish, the maturity stages, gonad somatic index (GSI), sex ratio, fecundity and spawning patterns as the basic i…
Time schedule can be define as distribution of time for each part of work during a project, start from the begin of work until the end of it. The goals of this research are to analyze the time schedule using network planning with CPM method; to calculate the incremental cost due to acceleration, total cost according to number of labour on critical path; and also to compare the calculation b…
Riau has the largest peat land in Sumatra, which is about 4.044 million ha. Peatlands have the potential as a carbon sink and unique habitat. But most of the peatlands of Riau has been transformed into a function of oil palm plantations, tree plantations, agricultural areas and settlements. It is expected to cause a decline in soil carbon reserves, decreased function of peatland ecosystems and …
The high value of side barriers on a road segment will cause a decrease in road performance. The amount of side barriers is very influential on the capacity of road and vehicle speed. The purpose of this study is to analyze the factors that influence side barriers as well as service levels to improve traffic performance. The research conducted in the form of traffic volume survey (LHR) to see v…
The improvement program of mung bean (Vigna radiata L.) can be done by crossbreeding, selection, and testing of the progeny to obtain new varieties. study aims to analyze the segregation of characters sparkle seed, seed shape, and color of green pea pods on the plants of the result of crossbreeding plants green pea pods brown and black. The study was conducted at the experimental station of Bio…
Mangrove ecosystem is a natural resource that has an important value in various aspects of life and environmental services. Increasingly wide spread damange to ecosystem is suspected to have lowered the various function and benefits. The research aimed to describe the characteristics of mangrove stands, calculated value of the economic benefits of mangrove ecosystem resources and determine …
Decreasing of water debit for agricultural irrigation service is the basic problem in Batang Samo Weir in Rokan Hulu Regency that caused by direct water use for fish ponds at some place around 30,05% along main irrigation channel. To reduce water losses in the primary canal, water flow analysis needed in order to create a new intake channel for the development of fishery area downstream of Bata…
Side friction is road side activity that can lead to conflict and affect the movement of the traffic flow and reduce the function of road performance. The ammount of side friction affects capacity and speed of road vehicles. This research are obtained by doing survey of traffic volume to see the density of vehicles, then surveys the side friction to see the influence of interference and instant…
3GPP sets are the standard for the latest wireless communications technology for Long Term Evolution (LTE). It has been used to meet the needs of consumers today. But only few of development city have implementing it. The rest of the city still not implement it. One of them is the taluk kuantan city. This region has not been deployed by this technology. Due to that reason the design has been ma…
Information on electrical conditions and electrical control in households is very difficult to do when away from home. The use of mobile phones can be the best solution for this because at this time the controller and monitoring system using the phone has grown rapidly. By using GSM and Arduino Module can make a tool that can monitor and control electricity at home. From the prototype-making ex…
The study of waterwheels curved undershot type is done in order to find a source of energy as an electricity generator. The picohydro generator test equipment is produced based on field survey data. The test is carried out by varying the flow rate and torque load and then calculations are performed to determine the performance of the waterwheel. From the test it is known that the maximum power …
Friction welding is a solid-state welding without the use of filler metal by using pressure method where by two workpieces to be connected are placed in contact and regulated relative motion in pressure, so that on the contact surface there will be heat (close to the metal liquid point), then after the rotation is stopped will form metal connection. Friction welding in the laboratory technology…
The main constraint faced in the utilization of lignocellulosic organic waste is lignin content that is difficult to degrade both enzymatically and chemically. One solution to solve the problem is by composting method with the addition of Trichoderma viride and MOL Tapai. Composting TKKS using windrow method for 40 days. The study was conducted by varying the dosage of Trichoderma viride and MO…
In Law No. 22 of 2009 on Road Traffic and Transportation that has been regulated in the use of vehicles with the rules, but in fact there are still many who violate the rules, especially for minors who drive a vehicle without having a driver's license and this with the support of the parents. But so far, any form of violation is not seen by the traffic police even the lack of sanctions imposed …
The term reclamation is a derivate of the English term reclamation comes from the reclaim verb meaning to take it back, with emphasis on the word “back” reclamation according to law number 1 year 2014 the amendement to law number 27 year 2007 is an activity carried out by everyone in order to increase the land resources reviewed from environmental and socio-economic point of view by way of …
Roads damage can use inconvenience for road user. Roads are damage should be repaired or increased. Overlay calculations using data deflection on the way through the Garuda Sakti Pekanbaru City conducted to complete the road infrastructure. The purpose of this study was to calculate the extra thick layer (overlay), the design life 5 years and 10 years, traffic growth 7,04 %, while the length of…
The research aims to observe and to find the best concentration of wild betel leaf powder extract to control cocoa pod disease caused by Phytophthora palmivora Butl. The research had been conducted from October to December 2015 at the Laboratory of Plant Pathology, Faculty of Agriculture, University of Riau. The research was conducted experimentally using a completely randomized design consisti…
The purpose of this research is to know the influence of biogas liquid waste, the effect of N fertilizer and the interaction of the combination of biogas liquid waste fertilizer with N fertilizer, and to determine the dosage of biogas liquid waste, N fertilizer and combination of biogas liquid waste fertilizer with N fertilizer that can increase the production of plants mustard. This research w…
Modified sago starch (mosas) is sago starch which has been modified microbiology by Lactobacillus plantarum RN2-12112. Mosas be able use for substituent of manufacture sweet bread. The purpose of this study is obtained the modified sago starch by microbiology use Lactobacillus plantarum RN2-12112 and getting the ratio of flour and mosas sweet bread with the best quality standard. This study use…
The purpose of the study was to compare the antibacterial activity of Lactobacillus casei subsp. casei R-68 and Lactobacillus casei commercial against Staphylococcus aureus FNCC-15 and Escherichia coli FNCC-19. The research was carried out experimentally by testing isolates and cell-free supernatant of Lactobacillus casei subsp. casei R-68 and Lactobacillus casei commercial and to test the sens…