bluuebunny/crossref_metadata_2025 huggingface dataset:
PETROGRAPHIC, MINERAL, GEOCHEMICAL CHARACTERISTICS OF BA NA GRANITOID
Authors: Le Phuc Duc
Published: April 2020

Ba Na granitoid is isometric shape, with exposure of 30 sqa km area. Petrographic composition is mainly coarse - medium grained biotite granite, included in the first phase. The fine grained leuco rock of the second phase is small massif in shape, distributed along fault in NE-SW direction. SiO, content of Bana granitoid is variation from 73.74% to 76.24%. Total of K2O +Na2O is from 7.32% to 8.33%. Ratio of K2O/Na2O: 1.66 - 2.07. This is S-Granite. Value of 147Sm/144Nd = 0,1249 is nearly stable crust material. Ratio of Sm/Nd is low. ena has negative value and very small proved that Ba Na granitoid must derive from crust source or mantle source which rich (EM). The age of source regional forming calculated from isotopic of Sm, Nd is 1.06 Ba (according to model of chondrite mantle source region) or 1.74 Ba (according to model of poor mantle source). The prospects of related mineralization of Ba Na granitoid is Sn (W, Nb, Ta) with amsemblage of topaz - cassiterite - tourmaline - quartz (sometime is Ta - Nb). The result of isotopic analysis of U Pb in zircon of Ba Na biotite granite sample at lab of Tasmania University, Australia, age of Ba Na is 242.9 +1.5 Ma and 240.6 2.2 Ma.
STUDY ON SHOOT REGENERATION FROM LEAF CALLUS OF TETRACERA SCANDENS L.
Authors: Pham Ngoc Thi Bich , Phan Hoang Ngo
Published: April 2020

Tetracera scandens is an important herb, used to treat some diseases, such as gout, kidney diseases... The callus is formed from leaf on MS medium (Murashige & Skoog, 1962) supplemented with 2.5mg/l 2,4-D and 0.5mg/l BA. Before induced shoot regeneration, the callus had grown on MS medium supplemented with 0.5mg/BA and 0.5mg/l GA3. Shoot generation is actually induced on MS medium supplemented with 0.7mg/l BA and 0.1mg/l IAA. The number of shoot regeneration is about 26/callus (from 0,3cm' leaf tissue). Shoot origin, role of endogenous hormones and respiration rate in shoot regeneration were analysis.
USING EXPANDING SPHERICAL FLAMES METHOD TO MEASURE THE UNSTRETCHED LAMINAR BURNING VELOCITIES OF LPG-AIR MIXTURES
Authors: Tran Vu Manh
Published: April 2020

In the present study, a technique making expanding spherical flames in a constant volume combustion bomb is presented for determining burning velocities of unstretched laminar flames, and applied to liquefy petroleum gas (LPG)-air mixtures. The experimental setup consists of a cylindrical combustion chamber coupled to a classical schlieren system. Flame pictures are recorded by a high speed camera. The laminar burning velocities of LPG-air mixtures are measured over a wide range of preheat temperatures, initial pressures and equivalence ratios. The effects of these initial conditions on the laminar burning velocities are also examined in this paper.
APPLICATION OF THE UNSUPERVISED NEURAL NETWORK FOR DIAGONOSING FAULTS IN A SPUR GEAR SYSTEM
Authors: Luu Tung Thanh
Published: April 2020

In transmission, gearbox with normal teeth is used popularly. Now, fault detection of gearbox is made by listening to abnormal noise and opening the gearbox to find the fault. This work takes much time and labour and results are not always exact. In this paper, vibration signal caused by fault are recorded and transformed into spectrum. The spectrum is used to train the unsupervised neural network. After the traning is completed, the unsupervised neural network will recognize the kind of fault which is produced by gearbox. Results of recognition from this method are almost exact when compared with others.
VOLTAGE STABILITY INVESTIGATION OF GRID CONNECTED WIND FARM
Authors: Trinh Chuong Trong
Published: April 2020

At present, it is very common to find renewable energy resources, especially wind power, connected to distribution systems. The impact of this wind power on voltage distribution levels has been addressed in the literature. The majority of this works deals with the determination of the maximum active and reactive power that is possible to be connected on a system load bus, until the voltage at that bus reaches the voltage collapse point. It is done by the traditional methods of P-V curves reported in many references. Theoretical expression of maximum power limited by voltage stability transfer through a grid is formulated using an exact representation of distribution line with ABCD parameters. The expression is used to plot PV curves at various power factors of a radial system. Limited values of reactive power can be obtained. This paper presents a method to study the relationship between the active power and voltage (PV) at the load bus to identify the voltage stability limit. It is a foundation to build a permitted working operation region in complying with the voltage stability limit at the point of common coupling (PCC) connected wind farm.
MOTION VECTOR CORRECTION AND REFINEMENT EFFECT IN FRAME UP-RATE CONVERSION
Authors: Hoang Chien Dinh
Published: April 2020

The paper applies the motion vector (MV) correction and refinement algorithm to frame up-rate conversion (FRUC) in order to enhance the quality of the interpolated frame. The motion compensated frame interpolation (MCFI) methods using bilateral motion estimation and hierarchical block matching algorithm are used to form the interpolated frame. Simulation results show that MV correction algorithm provides true motion vectors and MV refinement helps reducing the blocking artifact.
STUDY EFFECT OF LIGHTNING ARRESTERS IN TRANSFORMER PROTECTION, ACCOUNTING INFLUENTIAL FACTORS
Authors: Quyen Anh Huy , Nguyen Thanh Phan , Nguyen Au Ngoc , Truong Hung Ngoc
Published: April 2020

The high voltage side of distribution transformers is usually protected against lightning surges by lightning arresters. In installation of lightning arresters, the separation distance between the lightning arrester and the high voltage bushing of transformer is importance factor. The new method for determination reasonable installation location of the lightning arrester, accounting technical - economic criteria and several influential factors such as the ground flash density, shielding factor, failure rate, lifetime of a transformer and earth resistance is presented in this paper. The installation of lighting arrester in 400kVA, 22/0.4kV distribution station in Ho Chi Minh City is also discussed and offered practical recommendations.
COMPARE THE EFFICIENCY OF CONTROLLED STIFFNESS DAMPER WITH VARIABLE FRICTION DAMPER FOR SEISMIC PROTECTION OF BUILDING
Authors: Nguyen Phuc Quang Bao , Pham Hoa Nhan , Chu Thang Quoc
Published: April 2020

The implementation of variable friction dampers (VFD) for vibration mitigation of seismic structures generally requires an efficient semi-active control law. In this paper, a semi-active modal control method is proposed to determine the controllable clamping force of a variable friction damper. A comparative study was performed on a multiple DOF structure controlled by passive friction dampers, variable friction dampers in subsection numerical examples. Finally, this paper also provides preliminary conclusions about the advantages and disadvantages for friction dissipators.
METHOD OF DETERMINATION OF INITIAL PORE WATER PRESSURE OF SATURATED CLAYED GROUND UNDER EMBANKMENT
Authors: Bui Son Truong
Published: April 2020

Base on proposed formulation and testing results, method of determination of initial excess pore water pressure, which is used in filtration consolidation and other geotechnical problems in case of plane and spatial problems. Unlike supposition in initial time t = 0, σ = uwo, i.e. accepting a value of coefficient of initial pore water pressure β=1, by the laboratory testing results in triaxial cell, value of coefficient of initial pore water pressure of weak saturated clayey soils in HoChi Minh City and Mekong delta is lower 1. Output computation and research results show, that initial excess pore water pressure depends on water saturation, value of compression stress and groundwater level. Using the suggested formula allows determining coefficient of initial excess pore water pressure and applies to estimate initial settlement, distribution initial pore water pressure in consolidation and long term settlement.
THE CRITICAL EFFECTS OF ENVIRONMENTAL VARIATIONS ON ANAEROBIC DIGESTION OF ORGANIC FRACTION MUNICIPAL SOLID WASTE (OFMSW) TREATMENT
Authors: Le Tran Thi Hong
Published: April 2020

The aim of improving knowledge about the stability and reliability of anaerobic digestion of OFMSW, several researchers have studied the effects of operational or environmental variations on the performance of such reactors. In general, anaerobic digestion is affected by changes in external factors and the treatment of anaerobic digestion of OFMSW is, in many aspects of environmental variations mature. Typical topics such as process aspects (performance, two- and single-phase systems), digestion enhancement (pH, moisture, temperature, waste composition, nutrient concentration, particle size, toxicity and inhibition, mixing, granulation and biofilms, loading rates and solid retention time, bioreactor systems for OFMSW pre- and post treatments).
COLLECT EXTRACELLULAR MATRIX FROM IN VITRO FIBROBLAST
Authors: Nguyen Giang Thi Thanh , To Quan Minh , Phan Ngoc Kim , Tran Ha Le Bao
Published: April 2020

Extracellular matrices (ECM) have been reported to enhance cell attachment and proliferation as well as to create stem cell niches invitro. We harvested ECM from human fibroblasts for a number of researches, including tissue engineering. Fibroblasts were isolated from human foreskins, cultured in DMEMF12 containing 10% FBS and identified by Trichrome staining and immunohistochemistry for Vimentin. Then, fibroblasts were stimulated to synthetize ECM in medium supplemented 0.05% ascorbic acid. Cell constituents were removed by using Triton X-100, NH4OH and DNAse. ECM proteins were evaluated by PAS staining. Results showed that collagen is present in ECM.
INVESTIGATING COOLING RATE AND FETAL BOVINE SERUM CONCENTRATION ON SURVIVAL AND STEMNESS OF MESENCHYMAL STEM CELLS AFTER CRYOPRESERVATION
Authors: Pham Phuc Van , Nguyen Tam Thanh , Vuong Nhung Thi Hong , Duong Tuyet Thi Bach , Phan Ngoc Kim
Published: April 2020

Mesenchymal stem cells (MSCs) can be derived from many different sources. Umbilical cord blood is a rich source of MSCs. The cryopreservation of MSCs that MSCs are still alive and differentiate into many different kinds of functional cells is very important. The aims of this research are to identify ratio of alive and dead cells as well as stemness of them after thaw. The results showed that the stemness was not affected by cryopreservative protocols or media. All cells being alive after thaw could form colonies and differentiate into adipocytes and osteoblasts. Ratio of alive and dead cells was affected very much by cryopreservative protocols and media.
Adsorption of Co2+ from Aqueous Solution Using G Low Cost Adsorbent
Authors: B. D. Gharde , A. D. Gharde
Published: April 2020

Concentration of water supplies with metals is constant area of concern naturally an international. The challenge to remediate hazardous metals containing waste stream from present formal mining operation, industrial sites and ground water is immersed. Adsorption has proved to be an accelerate way to treat industrial waste effluents. The heavy metals renders the water unsuitable for drinking and also higher toxic to human being. Removal of these material is therefore essential. The studies pertaining to the use of inexpensive agro based adsorbents, such as tree bark, saw dust, Corn cob, straw and fly ashes for heavy metals ions has been investigated using Mangifeara indica substrate through batch adsorption studies. Result obtained are quite encouraging, batch adsorption studies have shown that removal of metal ions is dependent upon process parameters like contact time, temperature, metal ions concentration, dosage and pH. The maximum removal of Co2+ to the extent of has been achieved at pH 4 to 6 in 30 min in the concentration range 30 to 90 mg/liter. The use of packed column adsorption has been investigated at the optimum condition, to study the feasibility of the process s for application in small scale industries.
Lembaga Pencegahan dan Pemberantasan Perusakan Hutan dalam Dimensi Sistem Peradilan Pidana Disektor Kehutanan
Authors: Arif Junaidi
Published: April 2020

Tujuan penelitian ini adalah untuk mengetahui bagaimana peran lembaga pencegahan dan pemberantasan perusakan hutan dalam rangka optimalisasi  sistem peradilan pidana disektor kehutanan di Indonesia.  Penelitian ini adalah penelitian hukum normatif atau doktrinal, penelitian ini didukung oleh bahan-bahan hukum berupa bahan hukum primer, sekunder dan tersier. Pendekatan yang digunakan dalam penelitian ini adalah pendekatan perundang-undangan (statute approach), pendekatan konsep (conseptual approach), dan pendekatan sejarah (historical approach), sedangkan analisis penelitian dengan cara penafsiran asas-asas hukum, dengan kerangka berfikir deduktif-induktif sebagai suatu penjelasan dan interpretasi logis dan sistematis.  Hasil penelitian ini menunjukkan Undang-undang Nomor 18 Tahun 2013, mengamanatkan pembentukan Lembaga Pencegahan dan Pemberantasan Perusakan Hutan, lembaga tersebut berkedudukan di bawah Presiden, unsur-unsur kelembagaan adalah Kementerian Kehutanan, Polri, Kejaksaan dan Unsur lain yang terkait. Struktur kelembagaan dipimpin oleh seorang Kepala dibantu beberapa Deputi diantaranya, deputi bidang pencegahan, penindakan, hukum dan kerjasama serta deputi pengawasan internal dan pengaduan masyarakat. Lembaga ini memiliki kewenangan tugas dan fungsi untuk melakukan pencegahan dan penindakan perusakan hutan yang dilakukan melalui proses hukum penyidikan, penuntutan sampai dengan proses pemeriksaan di persidangan. Selain kewenangan tersebut Lembaga ini juga memiliki fungsi koordinasi dan supervisi penangan perkara tindak pidana kehutanan.
Yüksek Lisans Öğrencilerinin Demokrasiye İlişkin Görüşleri
Authors: ŞAHİN Şeyma , ÖKMEN Burcu , KILIÇ Abdurrahman
Published: April 2020

Bu araştırma ile; bir devlet üniversitesinde yüksek lisans eğitimi alan öğretmenlerin demokrasiye ilişkin algılarının belirlenmesi amaçlanmıştır. Araştırma, nitel araştırma desenlerinden “olgu bilim” deseni kapsamında yürütülmüştür. Araştırmanın çalışma grubunu, 2017-2018 eğitim öğretim yılı bahar döneminde bir devlet üniversitesinin “Eğitim Programları ve Öğretim” ile “Eğitim Yönetimi” yüksek lisans programlarından seçmeli “Demokrasi ve İnsan Hakları” dersini alan 14 katılımcı oluşturmaktadır. Veriler, “cümle tamamlama tekniği” ve “görüşme” yöntemi ile toplanmıştır. 27 tamamlanmamış cümleden oluşan “cümle tamamlama formu” ile dört açık uçlu sorudan oluşan “görüşme formu” veri toplama aracı olarak kullanılmıştır. Verilerin çözümlenmesinde içerik analizi yöntemi kullanılmıştır. Analizler sonucu araştırma bulguları; 1. Temel Haklara Yönelik Algılar, 2. Demokrasiye Yönelik Algılar, 2. Demokrasinin Unsurlarına Yönelik Algılar, 4. Demokratik Toplum Özelliklerine Yönelik Algılar olmak üzere dört ana başlık altında toplanmıştır. Elde edilen sonuçlar doğrultusunda çeşitli öneriler geliştirilmiştir.
Mesleki Yeterlik Algıları Ölçeğinin Geliştirilmesi ve Uygulaması
Authors: KAYSİ Feyzi
Published: April 2020

Özet: Meslek yüksekokullarının temel amacı ilgili oldukları sektördeki firmaların beklentilerini karşılayacak yeterlikteki ara elemanları yetiştirmektir. Bu kapsamda verilen mesleki eğitim ile öğrencilerin veya mezunların yeterlikleri önem arz etmektedir. Bu çalışmanın amacı meslek yüksekokulu öğrencilerinin mesleklerine yönelik yeterlik algılarını belirlemektir. Çalışma nicel yöntemlerle gerçekleştirilmiştir. Bu kapsamda tarama modeli ile veriler toplanmıştır. Çalışma kapsamında üç faktörlü Mesleki Yeterlik Algısı Ölçeği geliştirilmiştir. 218 katılımcıdan alınan verilerle ölçeğin geliştirilmesine yönelik çalışmalar yapılmıştır. Bu kapsamda önce doğrulayıcı faktör analizi daha sonra ise açımlayıcı faktör analizi yapılarak ölçek maddelerinin geçerlik ve güvenirlik testleri tamamlanmıştır. Geliştirilen ölçek 37 maddeden oluşmaktadır. Ölçeğin tamamına yönelik Cronbach’s Alpha değeri ,852 ve KMO değeri ,955 olarak belirlenmiştir. Ölçeğin uygulanması sürecinde 438 katılımcı çalışmada yer almıştır. Çalışmanın bulguları arasında, katılımcıların mesleki yeterlik algılarında cinsiyet değişkenine göre kadınlar lehine anlamlı farklılık tespit edilmiştir. Yaş değişkenine göre mesleki ilgi boyutunda yaşça daha büyük katılımcılar lehine anlamlı farklılık tespit edilmiştir. Son olarak öğrenim görülen program değişkenine göre de Elektrik programı lehine anlamlı farklılıklar tespit edilmiştir. Çalışmanın sonuçları arasında, ölçeğin geçerli ve güvenilir olduğu ve öğrencilerin mesleki yeterlik algılarını ölçek için uygun bir ölçme aracı olduğu yer almaktadır. Çalışmanın önerileri arasında, farklı birimlerde öğrenim gören öğrenciler için araştırmaların yapılabileceği yer almaktadır.
Çocuklar için Felsefe Neden Önemlidir?
Authors: Özkan Burcu
Published: April 2020

Bu çalışmanın amacı, çocuk felsefesi ile ilgili çalışmalar temel alınarak, çocuklar için felsefenin neden önemli olduğunu teorik bir zeminde belirlemektir. Günümüzde çocuklar için felsefenin önemli olduğunu ileri süren çalışmalarla çocuk felsefesi eğitimine dikkat çekilmektedir. Çocuklar için felsefenin kurucusu olarak kabul edilen Matthew Lipman, üniversitedeki öğrencilerinin düşünsel yetilerinin eksikliklerinden yola çıkarak felsefe eğitiminin çocukluk döneminde alınması gerektiğini ileri sürmüştür. Bizim eğitim sistemimizde de çocuklar felsefe eğitimi ile geç yaşlarda tanışmaktadırlar. Bu da felsefe eğitiminin amacına ulaşmasında sorunlar yaratmaktadır. Başta Lipman olmak üzere birçok düşünüre göre çocuklar felsefe ile erken yaşlarda tanışarak, felsefi düşünmeyi kazanmalıdırlar. Felsefi düşünme ile sorgulayan, merak eden çocukların eleştirel düşünme becerilerinin geliştirilmesi hedeflenmektedir. Çünkü insanlar, çocukluk döneminden sonra soru sormaktan, sorgulamaktan vazgeçerler ve meraklarını da yitirirler. Çocuklar için felsefe eğitimi ile onların düşünen ve üretken bireyler olarak yetişmeleri istenmektedir. Sokrates yıllar önce öğrencilerine ‘Okuduklarınızı ve duyduklarınızı değil, kendi öz düşüncelerinizi, kendi içinizde olup bitenleri söyleyin. Başkalarının ağaçlarından meyve yeme alışkanlığından sıyrılarak, kendi bahçenizin fidanlarını yetiştirin. İşte o zaman, meyve yemenin zevkini tadacaksınız’ diye söyleyerek eleştirel düşünmenin öneminden bahsetmektedir. Aslında yıllar önce Sokrates’in doğurtma yöntemi ile temelleri atılan çocuklar için felsefe eğitimi, pek çok alanda ve okul öncesinden başlayarak ileriki yaşlarda da gereklidir.
Görme Engelliler için Klavye Öğretim Programının Etkililiğinin İncelenmesi
Authors: KÜÇÜKÖZYİĞİT Mehmet Salih , CAKMAK Salih
Published: April 2020

Görme engelli bireylerin eğitimi ve bilgi edinimi için Braille yazı sisteminin tek başına yeterli olmadığı düşünülmektedir. Görme engelliler için fırsat eşitliğini sağlayacak tedbirlerin başında Bilişim tabanlı teknolojiler gelmektedir. Bilişim tabanlı teknolojileri görme engelli bireylerin müfredata erişimine yönelik birçok alternatifi de beraberinde getirmektedir. Görme engelliler için standart klavye ile yazı yazmak erişilebilir, kolay öğrenilen ve ucuz bir yöntem olabilir. Türkçe Etkin Klavye Öğretim Programı (TEKÖP) görme engelli öğrencilerin klavye ile yazma öğrenmelerini amaçlayan bir bilgisayar programdır. Türkçe Etkin Klavye Öğretmen Programı’ nın etkililiğini inceleme amacı doğrultusunda “örnek olay çalışması” kullanılmış ve araştırma okuma yazma bilmeyen bir görme engelli öğrenci ile gerçekleştirilmiştir. 53 oturum boyunca bilgisayar rehberliğinde gerçekleşttirilen 15 dakikalık oturumlar halince yapılan öğretimler sonucunda görme engelli öğrencinin seslendirilen metinleri klavye aracılığı ile yazabildiği gözlemlenmiştir. Öğrenci, öğrenci velisi ve öğretmeninden toplanan sosyal geçerlilik verileri çalışmanın olumlu sonuçlar verdiği yönündedir.
Case Based Reasoning Method untuk Sistem Pakar Diagnosa Penyakit Sapi
Authors: Muzakkir Irvan , Botutihe Marniyati Husain
Published: April 2020

This study discusses about the Application of Case Based Reasoning (CBR) Method for Expert Systems in Diagnosing Cattle Disease. Beginning with data collection by consulting experts in the Department of Agriculture in Animal Health, Pohuwato Regency. The data obtained in the form of data names of disease and symptom data. The data is obtained based on the steps of the CBR method calculation in order to obtain the results of the diagnosis and the solution provided for handling the disease. Researcher have analyzed and create program listings to build a system that will be used by farmers. Based on CBR calculations Scours case which has the lowest weight is 0.09 while the highest weight is owned by the Pink Eye case 1. In this process provides a solution to the similarity of the case weight from the old case to the new higher case. In the case of Pink Eye having a higher weight and positive exposure to pink eye disease, the solution given is the provision of anti-allergic, anti-biotic and vitamin. Based on the results obtained, it can be concluded that the application of the CBR method is good for using cattle disease and is very helpful for farmers in dealing with cattle disease.
Analisis Implementasi Server Chatting pada Wireless LAN
Authors: Satra Ramdan
Published: April 2020

There are currently many types of social media, but all of them are based on external servers. This causes communication data between users on social media to be stored on an external server. Retrieval of data without the permission of the owner is very possible. Therefore, we need a local server to store these data in certain companies or organizations. This research consists of several stages, namely designing a chat server topology, then configuring a chat server using Kamailio and finally testing the performance of the local network with parameters delay, packet loss and wireless signal strength (decibels). The results of this study indicate that the chat server implementation can be applied to the Faculty of Computer Science UMI based on observations of delay, packet losss and signal strength on the 1st and 2nd floors. On the 1st floor, the network access is quite good. WiFi is in the position of -50 dBm to -76 dBm and 0% packet loss and delays from 8 ms - 60 ms. On the 2nd floor, the WiFi network access is good enough, but at the 2nd location point, the second floor has a long delay of 563 ms, this shows bad access to the chat server, but the whole point shows that the second server's chat access is good.
Geometría del ancho de banda de un canal de comunicación
Authors: Guanga Chunata Deysi Margoth , Martínez Guashima Oswaldo , Lara Freire Mercedes Leticia , Galarza Barrionuevo Omar Vinicio
Published: April 2020

Este trabajo tiene por objeto mostrar los resultados de un estudio planteado con un grupo de 50 estudiantes de ingeniería en Telecomunicaciones a quienes se les aplicó la construcción cognitiva de los elementos geométricos en la determinación del ancho de banda de un canal como una prueba de aprendizaje, la instrucción Matemática en las dimensiones epistémica y cognitiva. Se implementó una estrategia didáctica y una metodología de construcción, diseñada sobre los elementos geométricos para razonar sobre probabilidad condicional. Las producciones se analizaron antes y después de la instrucción. El propósito era contribuir a la construcción del significado de la fórmula programada en el software o firmware de una interfaz de red, al favorecer la habilidad de efectuar la construcción cognitiva del canal de comunicación y su comportamiento en un escenario de trabajo. Los estudiantes que desarrollaron esta habilidad, mostraron menores dificultades en sus resoluciones y plantearon nuevas ideas sobre optimización del canal de comunicación.
Effect of Transplanting Date on Growth and Yield of Advanced Lines of Transplanted Aman Rice
Authors: Sultana Amena , Shaikh Nilufar Yasmin , Zahan Mst Selima , Badshah Md Adil , Akter Romana , Issak Mohammad
Published: April 2020

This research was conducted in order to investigate the effects of time of planting on the grain yield and yield components of three advanced lines of rice under the Agro Ecological Zone (AEZ), Modhupur Tract. The research was conducted as a split plot using Randomized Complete Block Design (RCBD) with three replications in the Aman season of 2016 under the research field of Bangladesh Rice Research Institute (BRRI), Gazipur. In this research, the dates 01 August, 16 August, 31 August and 16 September were considered as the main factor in the main plots, and the advanced lines/varieties BR(Bio)9786-BC2-119-1-1, BR(Bio)9786- BC2-132-1-3 and BRRI dhan49 (check variety) were regarded as the secondary factors in the sub plots. The results showed that planting time significantly affected the plant height, the number of panicle per meter square, the number of tillers per meter square, the number of grains per panicle, 1000-grain weight and grain yield. Among the cultivars, the advanced line BR(Bio)9786-BC2-119-1-1 and BR(Bio)9786-BC2-132-1-3 produced significantly higher plant height, the number of panicle, the number of tillers, the number of grains per panicle, 1000- grain weight and grain yield than check variety BRRI dhan49 in all transplanting dates. The advanced line BR(Bio)9786-BC2-119-1-1 and BR(Bio)9786-BC2-132-1-3 produced average 1.02 and 0.57 t ha-1 higher yields respectively over the check variety BRRI dhan49 under the transplanting date 01 August to 31 August. The highest growth duration (130-146 days) was observed for the check variety BRRI dhan49 that followed by BR(Bio)9786-BC2-132-1-3 (132- 141 days) and BR(Bio)9786-BC2-119-1-1 (130-140 days)

Res. Agric., Livest. Fish.7(1): 01-07, April 2020
Enhancement of rice and wheat seed germination and seedling vigor by biocontrol agent, Cladosporium cladosporioides
Authors: Islam Md Touhidul
Published: April 2020

The biocontrol agent, Cladosporium cladosporioides, strain BOU1 was used to evaluate the rice and wheat plant growth by germination percentage, germination index, vigor index- I and vigor index-II in rice and wheat seed. All the variables of germination and seedling vigor of rice and wheat were increased by the conidial suspension of C. cladosporioides. The rice seed treated with C. cladosporioides had the highest germination index and vigor index-I with average mean values of 8.2 and 4.5, respectively; while the treated wheat seed showed the highest germination percentage and vigor index- II with average mean values of 80.3 and 0.05, respectively. The research is concluded that the biocontrol agent C. cladosporioides improves seed germination and seedling vigor of wheat and rice, which can finally be converted into superior yield even in adverse conditions.

Res. Agric., Livest. Fish.7(1): 09-15, April 2020
Spikelet fertility improvement of Boro advanced line (CN6) through supplemented nutrient management
Authors: Sultana Amena , Badshah Md Adil , Zahan Mst Selima , Islam Shah Ashadul , Issak Mohammad
Published: April 2020

The experiment was conducted in the Boro season of 2016-17, at Bangladesh Rice Research Institute (BRRI) farm under the Agro Ecological Zone (AEZ 28) Modhupur Tract. CN6 is a high spikelet bearing early maturing advanced line of rice but low in spikelet fertility. Supplemented nutrient management was examined to increase its spikelet fertility. Five treatments were used in this experiment. The treatments were as follows: T1 = BRRI recommended fertilizer dose + MgO @ 0.05%, T2 = BRRI recommended fertilizer dose + 60 g MoP + 60 g elemental S (80% wp) + 20 g ZnSO4, T3 = BRRI recommended fertilizer dose + Boron @ 5 ppm, T4 = BRRI recommended fertilizer dose + Copper @ 5 ppm) and T5 = BRRI recommended fertilizer dose alone. The experiment was conducted in Randomized Complete Block design with three replications. The results revealed that Treatment T3 (BRRI recommended fertilizer dose + Boron @ 5ppm) produced the more number of grains per panicle with an average of 201 which is 19.9% higher number of grains per panicle over the BRRI recommended fertilization under the treatment of T5. However, higher grain yield were recorded in treatment T3 compare to the control treatment T5 (BRRI recommended fertilization). Taken together, our results suggested that BRRI recommended fertilization alone with supplemented nutrient management, especially boron, significantly increased the spikelet fertility of the CN6 advanced line of Boro rice resulting higher yield.

Res. Agric., Livest. Fish.7(1): 17-23, April 2020
Residual effect of raw material of chitosan powder on chemical properties of soil under rice-rice cropping system
Authors: Sultana Amena , Munshi Mostarak Hossain , Md Kamruzzaman - , Bari ASM Fazle , Issak Mohammad
Published: April 2020

The experiment was conducted at the research field of Sher-e-Bangla Agricultural University, Dhaka- 1207, Bangladesh, during 2015-2016, to investigate residual effect of raw material of chitosan (CHT) powder on chemical properties of rice growing soils. The field experiment was done using BRRI dhan29. The experiment was laid out in randomized complete block design (RCBD) with four replications. The first experiment was done using four different doses of the raw material of CHT powder with one control. The treatments were as follows: T1= 0.5 t/ha, T2 = 1.0 t/ha, T3 = 2.0 t/ha, T4 = 4.0 t/ha and T5 = 0 t/ha. The second experiment was conducted in the same plot using the following treatments were T1= Residual effect of the raw material of CHT powder @ 0.5 t/ha (applied in the previous experiment) + 2/3rd of recommended N fertilizer, T2 = Residual effect of the raw material of CHT powder @ 1.0 t/ha (applied in the previous experiment) + 2/3rd of recommended N fertilizer, T3 = Residual effect of the raw material of CHT powder @ 2.0 t/ha (applied in the previous experiment) + 2/3rd of recommended N fertilizer, T4 = Residual effect of the raw material of CHT powder @ 4.0 t/ha (applied in the previous experiment) + 2/3rd of recommended N fertilizer and T5 = Residual effect of the raw material of CHT powder @ 0 t/ha + recommended N (control). The total nitrogen content, soil pH, organic carbon and organic matter status in the post-harvest-soils were increased due to the residual effect of the powder in rice growing soils. The maximum value of the pH (7.01), organic carbon content (0.72%), and organic matter content (1.24%) in the post-harvest soils were found in the treatment T4 and lowest values were observed in the control treatment (T5). From the results it could be concluded that some of the chemical properties of rice growing soils were improved due to the residual effect of the raw material of CHT powder. Residual nitrogen value indicates that the raw material of CHT powder has a slow releasing effect of organic nitrogen supplementation in soil. These results suggest that the residual effect of the raw material of CHT powder could play a significant role to improve the sustainable soil health.

Res. Agric., Livest. Fish.7(1): 33-42, April 2020
Proximate and micronutrient analysis of orange fleshed sweet potato leaves grown in Sylhet regions of Bangladesh
Authors: Kuddus Mohammad Abdul , Miah Md Mahbubul Alam , Datta Gopal Chandra , Sarker Ashoke Kumar , Alam Mohammad Hasnal , Khan Mohammad Mehedi Hasan
Published: April 2020

Sweet potato leaves are the traditional indigenous vegetables and most economically efficient source of micronutrients in terms of both land required and production costs per unit. This study aimed to compare and identify one variety rich with proximate, microelements and anti-oxidants from three high yielding sweet potato varieties viz. BARI SP-04, BARI SP -11 and BARI SP-12 including one local genotype leaves that helps provide leafy vegetables as well as micronutrients to poor community in lean vegetables production period of Sylhet regions. The tested varieties and genotype showed significant variation in different nutrient contents. In case of proximate composition the highest ether extract was found in BARI SP-11 (7.33% ±0.64 DW) and the lowest in BARI SP-04 variety (3.80% ± 0.42 DW). And the ash contents range was (12.05% ± 0.89 to 16.43% ± 1.02 DW), but the highest was recorded in BARI SP-12 and the lowest in BARI SP-04. In case of crude fiber the highest (19.99% ± 1.06 DW) was found in BARI SP-11 and the lowest (16.73% ± 0.62 DW) in local genotype. The microelements composition result revealed that BARI SP-04 reserved the highest (32.82 ± 4.5 mg 100 g-1) Iron & (2.1± 0.5 mg 100 g-1) Zinc and the lowest (19.40 ± 2.5 mg 100 g-1) Iron and (1.27 ± 0.2 mg 100 g-1) Zn in BARI SP-11 & local genotype respectively. However in case of phenolic compound, the highest 257.00 ± 10.3 mg TAE 100 g-1 DW was found in local genotype followed BARI SP-11 and BARI SP-12 but the lowest amount 218.75 ± 7.8 mg TAE 100g-1 DW was recorded in BARI SP-04. These results revealed that BARI SP-12 leaves reserved average standard proximate, microelements and antioxidant among the studied varieties and genotype. But all varieties leaves except local genotype contained essential nutrients which may favorably well to meet micronutrient deficiency especially lean vegetable production period for poor community in Sylhet region of Bangladesh.

Res. Agric., Livest. Fish.7(1): 43-50, April 2020
Micronutrient management in an advance line of rice (CN6) to increase the spikelet fertility under Aman season
Authors: Sultana Amena , Badshah Md Adil , Zahan Mst Selima , Islam Shah Ashadul , Manir Mohammad Rezaul , Issak Mohammad
Published: April 2020

The experiment was conducted in the Aman season of 2016, at Bangladesh Rice Research Institute farm under the Agro Ecological Zone (AEZ 28) Modhupur Tract. The CN6 is a high spikelet bearing advanced line of rice but low in spikelet fertility. Micronutrient management was examined to increase its spikelet fertility. Five treatments were used in this experiment. The treatments were as follows: T1= BRRI recommended fertilizer dose + MgO @ 0.05%, T2 = BRRI recommended fertilizer dose + 60 g MoP + 60 g elemental S (80% wp) + 20 g ZnSO4, T3 = BRRI recommended fertilizer dose + Boron @ 5ppm, T4= BRRI recommended fertilizer dose + Copper @ 5ppm) and T5 = BRRI recommended fertilizer dose alone. The experiment was conducted in Randomized Complete Block design with three replications. The results indicated that Treatment T3 (BRRI recommended fertilizer dose + Boron @ 5ppm) produced the more number of grains per panicle with an average of 194 which is higher number of grains per panicle over the control treatment T5 (BRRI recommended fertilization alone). Treatment T4 produced the highest number of 1000- grains weight (17.9 g). However, highest grain yield was recorded in the treatment T4 with an average of 3.94 t ha-1 compare to the control treatment T5 (BRRI recommended fertilization alone). Second highest grain yield (3.70 t ha-1) was found under the treatment T2 followed by T1 (3.57 t ha-1) and T3 (3.57 t ha-1). The lowest grain yield was recorded in the control treatment T5 (BRRI recommended fertilization alone). Taken together, our results suggested that micronutrient management, especially copper and zinc, improved the spikelet fertility of an advanced line CN6 resulting higher yield.

Res. Agric., Livest. Fish.7(1): 51-59, April 2020
Problems faced by the sub-assistant agriculture officers (SAAOs) working in department of agricultural extension
Authors: Hamid Md Imran , Datta Susmita , Islam Md Matiul
Published: April 2020

The overall agricultural development of Bangladesh is rapidly progressing. The advancement in agricultural attainments is not a problem free venture. Various new problems are being faced by the SAAOs (Sub-Assistant Agriculture Officers) at present. Thus the purpose of this study was to determine the extent of the problems faced by the SAAOs regarding agricultural extension at field level and to explore the relationships between the selected characteristics of the SAAOs and the faced problems. A number of 46 problems of SAAOs were selected as the focus issue (dependent variable). The study was conducted in Batiaghata and Dumuria upazila under Khulna district. Data were collected from randomly selected 53.97% of the SAAOs (34 out of 63) from each upazila, using an interview schedule during July10 to September 25 of 2019. A problem severity index (PSI) was used to make comparison among the 46 selected problems. Spearman’s Rank Order Correlation Coefficient (ρ) was used to ascertain the relationship between the focus issue (ordinal type of data) and personal characteristics of the respondents. In Batiaghata upazila about two-third of the SAAOs (61.5%) had moderate problems where, “slow rate of promotion compares to other govt. job”, “difficulties of getting promotion” and “shortage of manpower” ranked 1st, 2nd and 3rd position, respectively. In Dumuria upazila majority of the SAAOs (71.4%) had moderate problems where, “every block covers large area”, “shortage of manpower” and “difficulties of getting promotion” ranked 1st, 2nd and 3rd position, respectively. Student t-test result (t Stat 0.35; P(T<=t) two-tail 0.73) showed that there is no significant difference between the problems faced by the SAAOs of Dumuria and Batiaghata upazila. There was no significant relationship between extent of problems and selected characteristics in Batiaghata and Dumuria upazila, except job experience of SAAOs had showed a positive significant relationship. The SAAOs are facing various newly emerged problems at present while conducting agricultural extension activities which should be taken under consideration for priority based solution for sustainable agricultural advancement.

Res. Agric., Livest. Fish.7(1): 61-73, April 2020
Profitability analysis of Aloe vera (L.) production in selected areas of Bangladesh
Authors: Saiyem Md Abu , Sabur Shaikh Abdus , Hossain Mohammad Ismail , Khan Md Akhtaruzzaman , Begum Mst Fatema
Published: April 2020

Medicinal plants serve as important therapeutic agents as well as valuable raw materials for manufacturing numerous traditional and modern medicines. Aloe vera is a top ranked medicinal plant in Bangladesh. The objective of this study is to investigate the costs, returns and profitability of Aloe vera medicinal plant. The data were collected from the selected farmers of Bogura and Natore districts in Bangladesh during 2018. The total sample size is 123. The study applies the profitability analysis, break-even points and margin of safety percentage techniques. Surveyed farms are found at ranged from 0.01 to 0.41 hectares. Average cost of production per hectare is found at Tk. 876468.80, of which Tk. 647156.40 for operational cost and Tk. 229312.40 for fixed costs accounting for 73.84% and 26.16% of the total cost, respectively. The average yield of Aloe vera is stood at 41487.62 kg per hectare which is sold to two different markets: contract markets and local market. The mean price is estimated at Tk. 32.42 per kg in study area. The gross margin and net margin per hectare are found to be Tk. 698068.02 and Tk. 468755.61, respectively. The breakeven analysis showed that in the case of yield and price, the margin of safety percentage of Aloe vera is -53.48. It is also found at 42.01, 67.15 and 34.85 for variable cost, fixed cost and total cost of Aloe vera production. Therefore, the study noted that the Aloe vera medicinal plant production is profitable in the study area. Farmers have a great opportunity to allocate more land to Aloe vera production, which will make them more profit. Break-even analysis of Aloe vera production resists a large drop of yield and price before incurring a loss, which gives the farmers a comfortable margin of safety and a risk bearing ability.

Res. Agric., Livest. Fish.7(1): 75-81, April 2020
Effect of floor on welfare of lactating cows in small farms of Sirajgonj district, Bangladesh
Authors: Islam M Ariful , Shanta Solama Akter , Lima Rukaiya Akter , Mazumdar Shimul
Published: April 2020

Animal welfare is a relatively new topic and there is a dearth of the report regarding the welfare assessment of dairy cattle in Bangladesh. Therefore, the present study was carried out to assess the effect of floor surface of the dairy sheds on mastitis, skin lesions, cleanliness of body and lameness of lactating cow in smallholders’ production system. To conduct this study, 5 soil type floor, 5 brick paved and 5 concrete floors of small holder dairy units were selected in Sirajgonj district. From each shed, 5 numbers of dairy cows were selected preferably in the first lactation stage. A total 75 milk samples from three different types of the shed were tested for subclinical mastitis using a California mastitis test. The results showed that 40%, 28%, and 32% cows were CMT positive for subclinical mastitis in soil, brick made and concrete type floor, respectively. The prevalence of SCM was not significantly differences among the different types of floor (P>0.05). Cleanliness and hygienic status of the muddy soil type floor were found to be significantly poor in comparison to that of brick made and concrete type floor of dairy farms. The prevalence of skin lesions in different body parts was higher in brick made (62%) and concrete floor sheds (88%) compared to soil bedded (31%) floor. Hair loses in the concrete and brick made floor was significantly higher (P≤0.01) in comparison with the muddy soil floor. The overall prevalence of lameness of the brick made (72%) and concrete type floor was higher (65%) than that of soil bedded shed (48%). There was a significant difference of lameness between soil type and brick made floor of the shed (P>0.05). The study recommends that in order to reduce the high prevalence of subclinical mastitis, skin lesions and lameness in smallholder farmers require to improve floor conditions through regular cleaning of the floor or upgrade to the concrete floor using rubber mat.

Res. Agric., Livest. Fish.7(1): 87-95, April 2020
Pulse oximetry and clinical changes during electrosurgery in dogs anaesthetized with Xylazine-Thiopentone and Xylazine-Ketamine combinations
Authors: Munif Mohammad Raguib , Alam Md Mahmudul , Alam Md Rafiqul
Published: April 2020

This study was performed to explore the pulse oximetric evaluation of cardio-respiratory systems along with the determination of body temperature in dogs anaesthetized with xylazine-thiopentone (X-T) and xylazine-ketamine (X-K) combinations during electrosurgery. Six apparently healthy dogs weighed 20 to 25 kg undergoing electrosurgery (bipolar), were divided into two groups: group A (X-T) and group B (X-K). In group A (n=3), dogs were anaesthetized with xylazine @ 1.1 mg/kg body weight (BW) as intramuscular (IM) and thiopentone @ 20 mg/kg BW as intravenous (IV) injections, and in group B (n=3), dogs were anaesthetized with xylazine @ 1.1mg/kg BW IM and ketamine @ 5.5 mg/kg BW IM after premedication with atropine sulphate @ 0.05 mg/kg BW IM. Bipolar electrosurgery for gastrotomy or castration was performed in the dogs. Pulse oximetric monitoring and the evaluation of clinical changes: heart rate, respiratory rate and peripheral blood oxygen saturation (SpO2) were done along with the determination of body temperature before the induction of anaesthesia (control) and thereafter on 10, 20, 30, 40 and 50 minutes postinduction in both groups during electrosurgery. Temperature, heart rate and respiratory rate were altered significantly (P<0.05) during the experimental period in both groups as compared to the control values. SpO2 was decreased significantly (P<0.05) throughout the experiment and returned to the level of initial control value after complete recovery in both groups. These findings revealed that during electrosurgery in dogs the anaesthetic combinations of X-T and X-K exert certain clinical changes in the vital signs (body temperature, heart rate, respiratory rate) and SpO2 which should be carefully considered to take necessary steps for perioperative patient’s safety and recovery.

Res. Agric., Livest. Fish.7(1): 97-105, April 2020
Haematobiochemical changes of ovine (Ovis aries) blood during storage for transfusion
Authors: Md Shohag - , Munif Mohammad Raguib , Jahan Mst Nargis , Rahman Md Mizanur , Alam Md Rafiqul
Published: April 2020

Haematobiochemical changes of ovine (sheep) blood were investigated during preservation and storage with Citrate Phosphate Dextrose Adenine-1 (CPDA-1) and Acid Citrate Dextrose (ACD) for transfusion. Twelve healthy sheep were selected and divided into two equal groups: group X (n=6) and group Y (n=6). Thirty-five ml of blood was collected from each animal and preserved with CPDA-1 in group X and ACD in group Y under 4°C in refrigerator for 28 days. Haematological changes viz., total erythrocyte count (TEC), total leukocyte count (TLC), haemoglobin (Hb), packed cell volume (PCV), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH) and mean corpuscular haemoglobin concentration (MCHC); and biochemical changes viz., total protein (TP) and pH were evaluated immediately after blood collection and thereafter on day-1, day-3, day-7, day-14, day-21 and day-28 for both groups. In ACD preserved blood; TEC, TLC, Hb and PCV decreased significantly (P<0.01) from day-14 onward, whereas in CPDA-1 preserved blood, these parameters decreased significantly (P<0.01) from day-21 onward. Blood preserved in ACD showed significant changes (P<0.01) in MCV, MCH and MCHC respectively from day- 7, day-14 and day-21 onward, whereas blood preserved in CPDA-1 showed no significant changes in the same parameters throughout the experiment. In both groups, no significant changes were noticed in TP but significant changes (P<0.01) were observed in pH with the progression of storage period. These findings elicited that both ACD and CPDA-1 exert certain haematobiochemical changes in stored sheep blood, however, CPDA-1 was more efficient than ACD in terms of maintaining proper levels of TEC, TLC, Hb., PCV, MCV, MCH and MCHC during preservation and storage of sheep blood for transfusion.

Res. Agric., Livest. Fish.7(1): 113-120, April 2020
Effects of drying technique on the quality of Mola (Amblypharyngodon mola) dried by solar tent dryer and open sun rack dryer
Authors: Lithi Ulfat Jahan , Surovi Shyma , Md Faridullah - , Roy Krishna Chandra
Published: April 2020

Quality change of Mola (Amblypharyngodon mola) from open sun rack and solar tent dryer was evaluated at 1st, 2nd and 3rd days of drying. Sensory analysis showed that, solar tent dryer dry fish were excellent in overall quality of dry fish from open sun rack dryer. Moisture content of Mola from solar tent dryer was significantly (p>0.05) lower than the moisture content of dry fish from open sun rack dryer. Protein, lipid, ash and TVB-N content was significantly (p>0.05) higher in solar tent dried fish than dried fish from open sun rack. However, microbial load was higher on dry fish obtained from open sun rack dryer compared with the dry fish from low coat solar tent dryer. Moreover, the quality of the dried fish products from solar tent dryer was excellent in quality compared to the dried fish from open sun rack dryer.

Res. Agric., Livest. Fish.7(1): 121-128, April 2020