scholarly journals PENGUJIAN TANAH EKSPANSIF DENGAN SKALA MODEL MENGGUNAKAN KAYU DOWEL SEBAGAI PENGGANTI DINDING PENAHAN TANAH

2020 ◽  
Vol 3 (3) ◽  
pp. 853
Author(s):  
Richard Samuel ◽  
Alfred Jonathan Susilo
Keyword(s):  
Water Content ◽  
Pile Foundation ◽  
Expansive Soil ◽  
Lateral Movement ◽  
Swelling Properties ◽  
Important Thing ◽  
Shrinkage Potential

Foundation is one of the most important thing in a construction. The frequently used foundation in construction is pile foundation. In Indonesia  the used of pile is adapt by the condition and quality of the soil. Indonesia had many types of soil, and one of them is expansive soil. Expansive soil is a type of clay that had a swelling and shrinkage potential where the swelling happen when the water content is increase and shrink when the water content decreased. One of the mineral that can cause swelling is montmorillonite mineral in expansive soil. The chemical chain between particles that influenced by the increase of water content is causing montmorillonite mineral to swell. The focus of this research is lateral movement that happened to pile as an effect of the swelling properties in expansive soil. This analysis will also inform the effectiveness on using different size and number of pile in expansive soil. Fondasi merupakan salah satu bagian terpenting dalam suatu konstruksi. Salah satunya yang sering digunakan pada proses pelaksanaan konstruksi adalah fondasi tiang pancang. Di Indonesia sendiri penggunaan fondasi tiang pancang disesuaikan dengan kondisi dan kualitas dari tanah yang ada. Indonesia memiliki berbagai macam tipe dan jenis tanah yang berbeda, salah satunya adalah tanah ekspansif. Tanah ekspansif merupakan jenis lempung yang memiliki daya pengembangan dan penyusutan dimana pengembangan tersebut terjadi jika adanya penambahan kadar air dan menyusut ketika terjadi pengurangan kadar air. Salah satu yang dapat menjadi penyebab terjadinya pengembangan adalah kandungan mineral montmorillonite yang terdapat pada tanah ekspansif. Ikatan kimia antar partikel yang dipengaruhi oleh adanya peningkatan kadar air tanah menyebabkan mineral montmorillonite pada tanah ekspansif tersebut akan mengembang. Analisis yang dilakukan akan berfokus pada pergeseran lateral yang terjadi pada  tiang pancang sebagai akibat dari dampak pengembangan yang terjadi pada tanah ekspansif. Analisis ini juga menghasilkan efektivitas pada penggunaan ukuran dan jumlah tiang pancang ditanah ekspansif.

scholarly journals Pengaruh Kadar Air Awal Dan Surcharge Pressure Pada Uji Karakteristik Pengembangan Tanah Ekspansif

2017 ◽  
Vol 23 (2) ◽  
pp. 124
Author(s):  
Wilis Diana ◽  
Edi Hartono ◽  
Anita Widianti
Keyword(s):  
Water Content ◽  
Expansive Soils ◽  
Expansive Soil ◽  
Dry Density ◽  
Initial Water Content ◽  
Expansive Clay ◽  
Initial Water ◽  
Swelling Properties ◽  
Swell Percent ◽  
Swell Pressure

Expansive soils experience volumetric changes due to water content changes. These volumetric changes cause swell and shrink movement in soils, which in turn will inflict severe damage to structures built above them. A Proper understanding of how the expansive soil behaves during the wetting/drying process is essential for assessing the mitigation action of expansive soil hazard and design suitable foundation. The structures that build above expansive soil bed are susceptible to heave and to withstand swell pressure, thus the swell pressure must be considered in the design. This study focuses on swelling properties of two expansive clay from Ngawi, East Java and Wates, Yogyakarta. Laboratory test on disturbed samples is used to identified and to measured swelling properties. A series of swelling test was performed under constant soil dry density. The influence of initial water content and surcharge pressure on swelling properties (i.e swell percent and swell pressure) of compacted samples were investigated. The swelling properties test used ASTM standard 4546-03 method B. It was found that the lower initial water content the higher the swell percent, but the swell pressure seems not to be affected by initial water content. At the same initial water content, swell percent decrease with the increase of surcharge pressure, but swell pressure remains unchanged.

Analysis of Reading, Reference and Information Management on the Quality of Scientific Writing

2018 ◽  
Vol 2 (1) ◽  
pp. 63-69
Author(s):  
Muhammad Zarlis ◽  
Sherly Astuti ◽  
Muhammad Salamuddin
Keyword(s):  
Information Management ◽  
Scientific Writing ◽  
The Internet ◽  
Reference List ◽  
Management Skill ◽  
Library Search ◽  
Important Thing ◽  
Reading Material ◽  
Quality Of Research

In education, for educational instruments scientific writing is a very important thing. It requires an information management skill, information management is a library search, which can be done through a computer and guided by the internet. It can also be through the quality of reading used as a reference for scientific writing. In addition, in producing a paper also must know the management of writing, not only required to pay attention to the rules of standard language, but also must be able to convey ideas and ideas well and meet scientific criteria, such as making a quote or reference list used. This paper was written with the aim of improving the quality of research through reading material, making notes and avoiding plagiarism, references using the Harvard system for journals, books, and articles. Management of citing articles either CD or internet, writing, editing, storing references electronically, writing bibliography, and quotations.

scholarly journals Effects of different drying rates on the physiological quality of Coffea canephora Pierre seeds

2005 ◽  
Vol 17 (2) ◽  
pp. 199-205 ◽  
Author(s):  
Sttela Dellyzete Veiga Franco da Rosa ◽  
Delacyr da Silva Brandão Júnior ◽  
Édila Vilela de Resende Von Pinho ◽  
André Delly Veiga ◽  
Luiz Hildebrando de Castro e Silva
Keyword(s):  
Water Content ◽  
Storage Temperature ◽  
Removal Rate ◽  
Coffea Canephora ◽  
Development Stage ◽  
Seed Vigor ◽  
Drying Rate ◽  
Physiological Quality ◽  
Drying Rates

Desiccation tolerance in seeds depends on the species, development stage and drying conditions, especially the water removal rate. Coffea seeds are considered of intermediate performance, because they tolerate relative dehydration compared to orthodox seeds and are sensitive to low temperatures. The objective of this study was to verify the effect of different drying rates on the viability and storability of Coffea canephora seeds. A complete randomized experimental design was used, in a factorial 3 x 5 x 2 design, with three drying rates (fast, intermediate and slow), five final mean water contents after drying (51, 42, 33, 22 and 15 %) and two storage temperatures (10 and 20°C). The germination and seed vigor assessments, using radicle protrusion, cotyledon leaf opening, seedling emergence and emergence speed index, were performed shortly after drying and after two and four months storage. It was observed that with reduction in the water content there was reduction in the germination values and seed vigor, for all the drying rates. The greatest reductions in physiological quality occurred when the seeds were dried quickly and the best results were obtained at the intermediate drying rate. There was an effect of drying rate and storage temperature on the physiological quality of the seeds, and lower germination and vigor values were observed in seeds with lower water content stored at 20°C. C. canephora seeds were tolerant to desiccation down to 15 % water content and can be stored for four months at 10°C. A temperature of 20ºC can be used to store C. canephora seeds, as long as the water content is not reduced to values below 22 % water content.

Assessing the effect of moulding water content on the behaviour of lime-stabilised an expansive soil

2021 ◽  
pp. 1-13
Author(s):  
Abdelmoumen Aala-Eddin Driss ◽  
Khelifa Harichane ◽  
Mohamed Ghrici ◽  
Hamid Gadouri
Keyword(s):  
Water Content ◽  
Expansive Soil

scholarly journals Penurunan mutu dan pendugaan umur simpan sup krim instan labu kuning diperkaya tempe untuk lansia dengan metode accelerated shelf life testing (ASLT)

2020 ◽  
Vol 8 (2) ◽  
pp. 134-142
Author(s):  
Salma Shafrina Aulia ◽  
Budi Setiawan ◽  
Tiurma Sinaga ◽  
Ahmad Sulaeman
Keyword(s):  
Lipid Oxidation ◽  
Shelf Life ◽  
Water Content ◽  
Water Activity ◽  
Critical Parameter ◽  
Storage Period ◽  
Life Testing ◽  
Quality Of Water ◽  
Long Time

Background: Instant pumpkin cream soup enriched with tempeh had fulfilled 10% Recommended Dietary Allowances (RDA) for elderly so that it can be used as an easy-to-serve snack, but decreasing quality of instant cream soup will be happened if the instant cream soup was stored for a long time. Objectives: This study aimed to analyze quality of water content, water activity and lipid oxidation in instant pumpkin cream soup during storage and estimated the shelf life of pumpkin cream soup enriched with tempeh.Method:  Quality storage was analyzed using of water content, water activity (aw) and lipid oxidation. Estimation of shelf life was analyzed using Arrhenius Accelerated Shelf Life Testing (ASLT) model.Results: The results showed that the water content, aw levels and lipid oxidation of instant pumpkin cream soup increased during the storage period. The critical parameter used in this study was lipid oxidation. Instant cream soup without the addition of tempeh can last 447 days  while the cream soup with the addition of tempeh has a shelf life of 433 days.Conclusion: Quality of instant pumpkin cream soup decreased during the storage period and it would be expired over a year.

PERCEPATAN PENGOMPOSAN TANDAN KOSONG KELAPA SAWIT (TKKS) DENGAN PEMBERIAN UREA (Acceleration Composting Empty Fruit Bunches (Efb) With The Application Of Urea)

AgriPeat ◽  
2019 ◽  
Vol 18 (02) ◽  
pp. 113-124
Author(s):  
Journal Journal
Keyword(s):  
Weight Loss ◽  
Water Content ◽  
Palm Oil ◽  
Organic N ◽  
Empty Fruit Bunches ◽  
Randomized Design ◽  
Compost Application ◽  
Completely Randomized Design ◽  
Total P

                                                                                                                                   ABSTRAK Kelapa sawit merupakan tanaman perkebunan yang memegang peranan penting dalam industri pangan. Luas perkebunan kelapa sawit di Indonesia pada tahun 2014 mencapai 10 juta Ha. Pertumbuhan yang pesat diikuti dengan produksi crude palm oil (CPO) dan palm karnel oil (PKO) yang juga meningkat, sekaligus produk sampingan berupa limbah. Salah satu limbah pabrik kelapa sawit yang jumlahnya besar adalah tandan kosong kelapa sawit (TKKS). Tandan kosong kelapa sawit merupakan limbah organik yang berpotensi dimanfaatkan dibidang pertanian. Akan tetapi, TKKS memiliki nilai C/N yang cukup tinggi, akibatnya sukar dan lama untuk terdekomposisi. Salah satu cara pemanfaatan TKKS adalah dengan dilakukan pengomposan dengan pengkayaan urea. Diharapkan dengan perlakuan tersebut TKKS akan cepat terdekomposisi dan dapat segera dimanfaatkan oleh tanaman. Penelitian ini bertujuan untuk (1) mengetahui pengaruh pemberian urea terhadap pengomposan TKKS dan (2) mengetahui pengaruh peningkatan dosis urea terhadap kualitas kompos TKKS. Rancangan yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap (RAL) faktor tunggal dengan 5 perlakuan, yaitu U1 (urea 0 g setara dengan nilai C/N=), U2 (urea 30,9 g setara dengan nilai C/N=), U3 (urea 79,3 g setara dengan nilai C/N=), U4 (urea 176,1 g setara dengan nilai C/N=) dan U5 (urea 466,3 g setara dengan C/N = ) dan 9 ulangan, sehingga diperoleh 45 satuan percobaan. Hasil penelitian menunjukan bahwa pemberian urea berpengaruh sangat nyata terhadap susut bobot, kadar air, nilai pH kompos, C-organik, N-total, P-tersedia, dan nilai C/N, selain itu pemberian urea mengakibatkan terjadi perubahan tekstur dan warna pada kompos TKKS. Pemberian dosis urea 466,3 g mampu meningkatkan kandungan N-total, serta menurunkan nilai C/N dan nilai pH kompos. Pemberian dosis urea 79,3 g atau setara dengan C/N = mampu meningkatkan kandungan P-tersedia dan kadar air, menurunkan susut bobot dan kandungan C-organik, serta menunjukan perubahan tekstur dan warna yang lebih baik. Kata kunci: tanda kosongkelapa sawit (TKSS), kompos, urea                                                                                                                                        ABSTRACT Empty fruit bunches (EFB) is a solid wastes produced in large quantity from palm oil industry. Empty fruit bunches can be used as compost material, additionally difficult to decompose because it contain cellulose, hemicellulose, and lignin, as well as value of ratio C/N is high. Use EFB as compost material through the provision of urea has been done in this research. Urea are expected to reduce the value of ratio C/N and became a starter for microbial decomposers. The purpose of this research were (1) to determine the effect of urea on composting of EFB and (2) to determine the effect of increasing doses of urea to the quality of compost of EFB. This research was used a single factor of Completely Randomized Design (CRD) with 5 treatments, namely U1 (urea 0 g), U2 (urea 30,9 g), U3 (urea 79,3 g), U4 (urea 176,1 g), and U5 (urea 466,3 g), and 9 replications, until result 45 experimental units. The result showed that urea significant effect on weight loss, water content, value of pH compost, C-organic, N-total, P-available, and value of ratio C/N, besides urea resulted Widodoe, K. dkk Percepatan Pengomposan Tandan Kosong Kelapa Sawit…..…. 114 in a change in texture and color on the compost EFB. Application of urea 466,3 g was able to increase the content of N-total, reduce the value of ratio C/N and the value of pH compost. Application of urea 79,3 g can improve the content of P-available and water content, reduce the weight loss and the content of C-organic, and showed the changes in texture and color as better. Keywords: empty fruit bunches, compost, urea

scholarly journals Physiological quality of Gliricidia sepium (Jacq.) Steud. (Leguminosae - Papilionoideae) seeds subjected to different storage conditions

2012 ◽  
Vol 36 (2) ◽  
pp. 229-235 ◽  
Author(s):  
Renata Conduru Ribeiro Reis ◽  
Claudinéia Regina Pelacani ◽  
Cimille Gabrielle Cardoso Antunes ◽  
Bárbara França Dantas ◽  
Renato Delmondez de Castro
Keyword(s):  
Water Content ◽  
Seed Viability ◽  
Gliricidia Sepium ◽  
Storage Conditions ◽  
Physiological Processes ◽  
Plastic Bags ◽  
Starting Point ◽  
Cultivated Plant ◽  
Physiological Quality

Studies of seed physiological processes represent the starting point for the sustainable utilization of native or cultivated plant species from the caatinga biome for which germination studies are still scarce. In order to determine adequate methods for the conservation of Gliricidia sepium seeds, the physiological quality of propagules exposed to different conditions and times of storage were examined. Recently collected seeds of G. sepium were analyzed immediately, while the other sample was stored for three, six, nine, or twelve months in plastic or paper bags under refrigeration or at room temperature for further analysis. The germination rates of seeds from each storage regime were determined and these rates compared to their water content. It was observed that germination capacity was directly related to changes in seed humidity. Storing seeds in plastic bags yielded the best conservation, mainly when they were stored at low temperatures. However, even at temperatures near 25°C it was possible to prolong seed viability when their water content was controlled through the use of impermeable packing.

Control of Water Content for Enhancing the Quality of Copper Paddle-Wheel-Based Metal–Organic Framework Thin Films Grown by Layer-by-Layer Liquid-Phase Epitaxy

2018 ◽  
Vol 18 (12) ◽  
pp. 7451-7459 ◽  
Author(s):  
Zheng Wang ◽  
Katia Rodewald ◽  
Raghavender Medishetty ◽  
Bernhard Rieger ◽  
Roland A. Fischer
Keyword(s):  
Thin Films ◽  
Liquid Phase ◽  
Water Content ◽  
Liquid Phase Epitaxy ◽  
Metal Organic Framework ◽  
Layer By Layer ◽  
Paddle Wheel ◽  
Metal Organic ◽  
Organic Framework
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