scholarly journals Variability and inheritance of fiber length and wilt resistance in a complex 4-5 specific and backcross hybridization of cotton

Author(s):  
Sayfulla Boboyev ◽  
Gulnoza Toshpulatova ◽  
Ikrom Amanturdiev ◽  
Mirvakhob Mirakhmedov

In this paper presents data of researches about fiber length in the 4-5 species. The largest number of plants with the indicated analyzed trait in hybrid combinations, obtained with the participation of the variety Omad, appeared with a number of variations in fiber length at 35,0-36,0 mm and above. Investigation of 4-species hybrids of F2 and back cross hybridization allowed some improvement in the average value of trait when compared with F1. Despite the emergence of transgressive plants with fiber length 36,1-37,0 mm and above, the average trait of composite 5 species hybrids F2 remained almost at the level of F1, i.e. 35.5-36.0 mm. The greatest number of positive recombinants occurred in 5 species back crossing developed with the participation of Termez-31.

Author(s):  
Sayfulla Boboyey ◽  
Gulnoza Toshpulatova ◽  
Ikrom Amanturdiev ◽  
Mirvakhob Mirakhmedov

In this paper presents data of researches about fiber length in the 4-5 species. The largest number of plants with the indicated analyzed trait in hybrid combinations, obtained with the participation of the variety Omad, appeared with a number of variations in fiber length at 35,0-36,0 mm and above. Investigation of 4-species hybrids of F2 and back cross hybridization allowed some improvement in the average value of trait when compared with F1. Despite the emergence of transgressive plants with fiber length 36,1-37,0 mm and above, the average trait of composite 5 species hybrids F2 remained almost at the level of F1, i.e. 35.5-36.0 mm. The greatest number of positive recombinants occurred in 5 species back crossing developed with the participation of Termez-31.


1982 ◽  
Vol 93 (2) ◽  
pp. 374-382 ◽  
Author(s):  
TS Hays ◽  
D Wise ◽  
ED Salmon

We are investigating the relation between the force pulling a kinetochore poleward and the length of the corresponding kinetochore fiber. It was recognized by Ostergren in 1950 (Hereditas 36:1-19) that the metaphase position of a chromosome could be achieved by a balance of traction forces were proportional to the distance from kinetochore to pole. For the typical chromosome (i.e., a meiotic bivalent or mitotic chromosome) with a single kinetochore fiber extending to each pole, the resultant force (RF) would equal zero when the chromosome lay at the midpoint between the two poles. For special chromosomes that have unequal numbers of kinetochore fibers extending towards opposite poles. For special chromosomes that have unequal numbers of kinetochore fibers extending towards opposite poles. For special chromosomes that have unequal numbers of kinetochore fibers extending towards opposite poles, Ostergren's proposal suggests that RF = 0 when the chromosome is shifted closer to the pole toward which the greater number of kinetochore fibers are pulling. We have measured the force-length relationship in living spindles by analyzing the metaphase positions of experimentally generated multivalent chromosomes having three or four kinetochore fibers. Multivalent chromosomes of varied configurations were generated by γ-irradiation of nymphs of the grasshopper melanoplus differentialis, and their behavior was analyzed in living first meiotic spermocytes. The lengths of kinetochore fibers were determined from time-lapse photographs by measuring the kinetochore-to-pole distances for fully congressed chromosomes just before the onset of anaphase. In our analysis, force (F) along a single kinetochore fiber is expressed by: F = kL(exp), where k is a length-independent proportionality constant, L represents the kinetochore fiber length, and exp is an unknown exponent. The RF on a chromosome is then given by: RF = σk(i)L(i)(exp), where kinetochore fiber lengths in opposite half- spindles are given opposite sign. If forces on a metaphase chromosome are at equilibrium (RF = 0), then for asymmetrical orientations of multivalents we can measure the individual kinetochore fiber lengths (L(i)) and solve for the exponent that yields a resultant force of zero. The value of the exponent relates how the magnitude of force along a kinetochore fiber varies with its length. For six trivalents and one naturally occurring quadrivalent we calculated an average value of exp = 1.06 +/- 0.18. This result is consistent with Ostergren's hypothesis and indicates that the magnitude of poleward traction force along a kinetochore fiber is directly proportional to the length of the fiber. Our finding suggests that the balance of forces along a kinetochore fiber may be a major factor regulating the extent of kinetochore microtubule assembly.


2019 ◽  
Vol 7 (3) ◽  
Author(s):  
Peterson Peterson ◽  
M Dirhamsyah ◽  
Nurhaida Nurhaida

The research aims to examine the physical and mechanical properties of cement board from sago fiber waste (Metroxylon Sp) based on cement size and composition and determine the best ratio of cement and sago fiber (Metroxylon sp) and meet the standards of JIS A 5417: 1992. The study was conducted at the Laboratorium WoodWorkshop, Wood Processing, Wood Technology and PT. Duta Pertiwi Nusantara Pontianak. The method used was an experimental method in a factorial Randomized Complete Design factorial experiment of 2 x 3 with 3 replications and a total of 18 experiments. The factors used in sago fiber length (Factor A) and fiber (Factor B).  The tests include physical properties and mechanical properties with a target density of 1 gr / cm³. The results showed that the average value of the physical properties of the cement board included density 0.9713 gr / cm³ - 1.2246 gr / cm³, moisture content 3.5054% - 3.9448%, water absorption 0.9746 % - 1.1318% and thick Development 0.8649% - 0.9892%. The mean mechanical properties of cement board include MOE 10,564,6646 kg / cm² - 35,475,7865 kg / cm² and MOR 7,5797 kg / cm² - 25,8554 kg / cm². The best research is in treatment (a1b2) with a ratio of cement and fiber (80:20) with a length of sago fiber 2 cm and meets the standards of JIS A 5417: 1992 with the of 23, with a physical property density value of 1.2198 gr / cm³, water content is 3.7401%, water absorption is 0.9944%, and thickness development is 0.9048%. The mechanical properties value of Modulus of Elasticity is 28439.1825 kg / cm² and Modulus of Rupture is 25.8554 kg / cm².Keyword:   Cement Comparison,  Fiber Length, Sago Fiber, Physical and Mechanical Propertie


2018 ◽  
Vol 1 (2) ◽  
pp. 57
Author(s):  
Masadah Masadah

Education is a conscious and systematic effort not only to humanize human beings but also for human beings to realize their position as khalifatullah fil ardhi, which in turn will increasingly increase itself to be a pious, faithful, knowledgeable and virtuous man. In general the problems formulated in this research is whether Implementation of Contextual Learning with Learning Community approach can improve student's motivation and achievement in FIQH study field? How Implementation of Contextual Learning has a Learning Community approach that can improve students' motivation and achievement in FIQH? Field. This research was conducted in Mojokerto Regency, precisely at MI Mambaul Hidayah Mengelo Sooko Mojokerto. This research is a classroom action research with collaborative type. This research phase follows a model developed by Kemmis and Taggart, which is a spiral cycle that includes planning activities, action execution, observation, and reflection. The data collection techniques used are: (1) observation; (2) measurement of learning result test; and (3) documentation. Data obtained from the action are then analyzed. Qualitative data consisting of observation and documentation are analyzed qualitatively, while data collected in the form of numbers or quantitative data, simply by using descriptive analysis and visual presentation. Based on the results of research that has been implemented can be concluded that the Implementation of Contextual Learning with Learning Community approach can improve student's motivation and achievement in the field of FIQH study. From the data in the field shows that there is an increase in student learning motivation that the initial average value of pre-test of 20 increased to 24 or about 20% in cycle I, in cycle II more increased to 31 or about 55%, and in cycle III the more increased to 45 or about 125%. Level of increase between cycle I with cycle II about 29%, between cycle II with cycle III about 45%, between cycle III with cycle I about 87%. With the increase of students' learning motivation, their learning achievement also increased, whereas the average value of pre test of 6.60 increased to 6.84 or about 4% in cycle I, in cycle II more increased again to 7.75 or about 17 %, and in cycle III it increases to 8.80 or about 35%. The level of improvement between cycle I with cycle II is about 13%, between cycle II with cycle III about 15%, between cycle III with cycle I about 30%.


Author(s):  
Achmad Habibullah

AbstractPedagogical competence is one of important competencies to the teachers. Therefore, this study aims to determine how the pedagogical competence of teachers is, viewed from the aspects of learning know­ledge skills, preparation of lesson plans, and learning in the classroom. This study used the quantitative method with 631 respondents of civil servant teachers of Islamic Education at school and teachers of ge­neral subjects at madrasah (Islamic school) recruited from non-permanent teachers in 20 districts/cities in Central Java province, selected at random. The findings show that teachers’ pedagogical competence knowledge on the aspect of learning knowledge skills is in the “poor” category, the aspect of students’ potential development knowledge and reflective efforts to improve the learning quality becomes a very weak point at an average value with the “very poor” category. In addition, the aspect of ability to prepare lesson plans is in the “sufficient” category, the teaching material organization and the evaluation aspect are very weak competence aspects, which get “poor”. Meanwhile, the competence of learning implemen­tation aspect is in the “sufficient” category. AbstrakKompetensi pedagogik merupakan salah satu kompetensi yang penting bagi guru. Untuk itu, penelitian ini bertujuan untuk mengetahui bagaimana kompetensi pedagogik guru, dilihat dari aspek kemampuan pengetahuan pembelajaran, menyusun rancangan pembelajaran (RPP), dan pembelajaran di kelas. Penelitian ini menggunakan metode kuantitatif dengan responden 631 guru PNS Pendidikan Agama Islam pada sekolah dan guru mata pelajaran umum pada madrasah yang direkrut dari guru honorer di 20 Kabupaten/Kota di Provinsi Jawa Tengah yang dipilih secara random. Hasil penelitian menunjukkan bahwa kompetensi pedagogik guru pada aspek kemampuan pengetahuan pembelajaran dalam kategori “kurang”, aspek pengetahuan pengembangan potensi peserta didik dan upaya reflektif untuk meningkatkan mutu pembelajaran menjadi titik yang sangat lemah dengan mendapat nilai rata-rata dengan kategori “sangat kurang”. Selain itu, aspek kemampuan menyusun RPP dalam kategori “cukup”, aspek pengorganisasian materi ajar dan aspek evaluasi merupakan aspek kemampuan yang sangat lemah dengan mendapatkan nilai “kurang”. Sedangkan, aspek kemampuan dalam melaksanakan pembelajaran dalam kategori “cukup”.


TAPPI Journal ◽  
2016 ◽  
Vol 15 (4) ◽  
pp. 265-272 ◽  
Author(s):  
ROHAN BANDEKAR ◽  
JIM FREDERICK ◽  
JAROSLAV STAVIK

This study addresses the challenges a dissolving-grade pulp mill in Canada faced in 2014 in meeting its total reduced sulfur (TRS) gas emission limit. These emissions from the recovery boiler exit are controlled by passing the boiler exit gas through a TRS scrubber system. The mill employs a cyclonic direct contact evaporator to concentrate black liquor to firing solids content. The off-gases from the direct contact evaporator flow to the effluent gas control system that consists of a venturi scrubber, a packed bed scrubber, and a heat recovery unit. Emissions of TRS greater than the regulated limit of 15 ppm were observed for a 4-month period in 2014. The level of emissions measured during this period was significantly higher than about 12 ppm, the expected average value based on historic experience. The problem persisted from mid-June 2014 until the annual mill shutdown in October 2014. The main TRS components detected and the performance of the Teller scrubber in capturing them are examined. Other potential causes for these emissions are identified, including mechanical problems such as broken packing in the TRS packed bed scrubber, broken baffle plates in the scrubber, and cyclone evaporator leaks causing air ingress. Repairs were carried out during the mill shutdown, which eliminated the TRS emissions problem.


2019 ◽  
Vol 13 (2) ◽  
pp. 55
Author(s):  
Indar Khaerunnisa ◽  
Edy Cahyadi

The Indonesian government has set the motor vehicle industry as one of the priority industries of the national interest, economic growth, and increased productivity. In order for the survival of a company is maintained, then the management should be able to maintain or even more spur increased performance. Various analyzes were developed to predict the beginning of the bankruptcy of the company. One analysis is widely used today is the analysis of Altman Z-Score, which this analysis refers to the financial ratios of the company. The purpose of this study was to analyze the bankruptcy of the automotive components companies that go public in Indonesia Stock Exchange year period 2011–2015. This study used a sample of four companies from the automotive components sector. Source of data is done by using secondary data. The data is processed by the method of the Z-score formula Z = 1,2X1 + 1,4X2 + 3,3X3 + 0,6X4 + 0,999X5. With the description of Z < 1,8 the company categorized into unhealthy/will be bankrupt, the value Z 1,8 < 2,99 the company is considered to be in the uncertain/grey area and the value of Z > 2,99 then the company is in a very healthy. In general, the results of these studies indicate that the four automtive components companies namely PT Astra Otoparts year 2011 value of Z = 14,67 year 2012 value of Z = 10,88 year 2013 value of Z = 13,90 year 2014 value of Z = 10,54 year 2015 value of Z = 4,94, PT Gajah Tunggal year 2011 value of Z = 5,72 year 2012 value of Z = 4,75 year 2013 value of Z = 3,10 year 2014 value of Z = 2,79 year 2015 value of Z = 1,58 and the average value of 2011-2015 periode Z = 3,59, PT Goodyear Indonesia year 2011 value of Z = 2,07 year 2012 value of Z = 2,44 year 2013 value of Z = 2,57 year 2014 value of Z = 2,02 year 2015 value of Z = 2,76, PT Indomobil Sukses Internasional year 2011 value of Z = 6,19 year 2012 value of Z = 3,99 year 2013 value of Z = 3,17 year 2014 value of Z = 2,59 year 2015 value of Z = 1,74. The average value 2011-2015 period showed 3 companies are in very healthy state and 1 company is in the uncertain/grey area. Keywords: Financial Ratio Analysis, Analysis of bankruptcy, Altman Z-Score Analysis, Automotive Components Company, Go Public.


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