포도 Delaware의 無核果生産을 위한 Streptomycin 利用試驗(II)

裵基煥,安相烈 진주산업대학교 1986 論文集 Vol.24 No.-

前 試驗에 이어 SM混用區의 GA_3 濃度를 50ppm으로 높이고 處理時期의 폭을 滿開前 18, 16, 14, 12, 10일로 하여 GA_3 單用區의 대체여부를 試驗한 結果는 다음과 같다. 1. 滿開期는 兩主區 모두 無處理보다 2~3일 빨랐다. 2. 熟期는 兩主區 모두 無處理보다 25일 정도 早熟되었고 單用區가 混用區에 비하여 1~2일 早熟되었으며 各細區間에 處理時期가 빠를수록 1~2일 정도 早熟되는 경향이 있었다. 3. 無核化率은 混用區는 40개區 모두 有核粒이 없었고, 單用區는 40개區 中 19개區에서 1~6개의 有核粒이 나타났다. 4. 收穫果房狀態는 單用區가 混用區에 比해서 1%水準 以上의 有意差로, 果房長은 길고 5%水準 以上의 有意差로, 平均 果粒重은 무거웠다. The studies were conducted continuously following previous test to determine the possibility of utilization with streptomycin for seedless berries production in Delaware grapes. The main plots which were applied with different chemicals(combind solution of GA_2(50ppm)+SM(200ppm), GA_3(100ppm) alone solution) as pre-bloom application and five split plots according to days applied before full bloom were designed. The results obtained were as follows; 1. The days of full bloom in both main plots was accelerated by two to three days compared with that in the untreatment. 2. The day of maturity showed tendency to delay one to two days in combined solution plot compared with that in alone solution plot. 3. In all combined solution plots, seed-holding berry was not found, but, in alone solution plots, they were found in nineteen out of forty plots. 4. The length of cluster harvested in combined solution plot was short and mean weight of berry was light compared with that in alone solution plot

Analytical Evaluation of FFR-aided Heterogeneous Cellular Networks with Optimal Double Threshold

( Sani Umar Abdullahi ),( Jian Liu ),( Seyed Alireza Mohadeskasaei ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.7

Next Generation Beyond 4G/5G systems will rely on the deployment of small cells over conventional macrocells for achieving high spectral efficiency and improved coverage performance, especially for indoor and hotspot environments. In such heterogeneous networks, the expected performance gains can only be derived with the use of efficient interference coordination schemes, such as Fractional Frequency Reuse (FFR), which is very attractive for its simplicity and effectiveness. In this work, femtocells are deployed according to a spatial Poisson Point Process (PPP) over hexagonally shaped, 6-sector macro base stations (MeNBs) in an uncoordinated manner, operating in hybrid mode. A newly introduced intermediary region prevents cross-tier, cross-boundary interference and improves user equipment (UE) performance at the boundary of cell center and cell edge. With tools of stochastic geometry, an analytical framework for the signal-to-interference-plus-noise-ratio (SINR) distribution is developed to evaluate the performance of all UEs in different spatial locations, with consideration to both co-tier and cross-tier interference. Using the SINR distribution framework, average network throughput per tier is derived together with a newly proposed harmonic mean, which ensures fairness in resource allocation amongst all UEs. Finally, the FFR network parameters are optimized for maximizing average network throughput, and the harmonic mean using a fair resource assignment constraint. Numerical results verify the proposed analytical framework, and provide insights into design trade-offs between maximizing throughput and user fairness by appropriately adjusting the spatial partitioning thresholds, the spectrum allocation factor, and the femtocell density.

One Step Electrodeposition of Copper Zinc Tin Sulfide Using Sodium Thiocyanate as Complexing Agent

Sani, Rabiya,Manivannan, R.,Victoria, S. Noyel The Korean Electrochemical Society 2018 Journal of electrochemical science and technology Vol.9 No.4

Single step electrodeposition of $Cu_2ZnSnS_4$ (CZTS) for solar cell applications was studied using an aqueous thiocyanate based electrolyte. The sodium thiocyanate complexing agent was found to decrease the difference in the deposition potential of the elements. X-ray diffraction analysis of the samples indicates the formation of kesterite phase CZTS. UV-vis studies reveal the band gap of the deposits to be in the range of 1.2 - 1.5 eV. The thickness of the deposit was found to decrease with increase in pH of the electrolyte. Nearly stoichiometric composition was obtained for CZTS films coated at pH 2 and 2.5. I-V characterization of the film with indium tin oxide (ITO) substrate in the presence and the absence of light source indicate that the resistance decrease significantly in the presence of light indicating suitability of the deposits for solar cell applications. Results of electrochemical impedance spectroscopic studies reveal that the cathodic process for sulfur reduction is the slowest among all the elements.

Thermal Resistance of Insulated Precast Concrete Sandwich Panels

Sani Mohammed Bida,Farah Nora Aznieta Abdul Aziz,Mohd Saleh Jaafar,Farzad Hejazi,Nabilah Abu Bakar 한국콘크리트학회 2021 International Journal of Concrete Structures and M Vol.15 No.6

Many nations are already working toward full implementation of energy efficiency in buildings known as Green Building. In line with this perspective, this paper aims to develop a thermally efficient precast concrete sandwich panels (PCSP) for structural applications. Therefore, an experimental investigation was carried out to determine the thermal resistance of the proposed PCSP using Hotbox method and the results were validated using finite element method (FEM) in COMSOL Multiphysics Software. The PCSP were designed with staggered shear connectors to avoid thermal bridges between the successive layers. The staggered connectors are spaced at 200 mm, 300 mm and 400 mm on each concrete layer, while the control panel is designed with 200 mm direct shear connection. In the experimental test, four (4) panels of 500 mm × 500 mm and 150 mm thick were subjected to Hotbox Test to determine the thermal resistance. The result shows that thermal resistance of the PCSP with staggered shear connection increases with increase in spacing. The PCSP with 400 mm staggered shear connectors indicates the best thermal efficiency with a thermal resistance (R value) of 2.48 m²K/W. The thermal performance was verified by FEA which shows less than 5% error coupled with a precise prediction of surface temperature gradient. This indicates that, with conventional materials, thermal path approach can be used to develop a precast concrete building with better thermal resistant properties. Hopefully, stakeholders in the green building industry would find this proposed PCSP as an alternative energy efficient load bearing panel towards sustainable and greener buildings.

Arabic Gum Grafted PEGDMA Hydrogels: Synthesis, Physico-Chemical Characterization and In-vitro Release of Hydrophobic Drug

Sani Mamman Ibrahim,Teo Yin Yin,Misni Misran 한국고분자학회 2020 Macromolecular Research Vol.28 No.13

Hydrogel development using natural and synthetic polymers for biomedical applications have shown promising properties for drug delivery due to virtuous stimuli response and improvement in mechanical strength. Biomaterial hydrogel was synthesized using combination of arabic gum (AG), a natural polymer and polyethylene glycol dimethacrylate (PEGDMA), a synthetic polymer. The synthesis process follows chemical cross linking by free radical polymerization. Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM) and differential scanning calorimetry (DSC) were used to characterize the hydrogels. Product yield, gel content and gelation time depends solely on the variable reacting concentrations and the mechanical properties of hydrogel depends on its compositions. Swelling studies reveal high swelling ratio in buffer solution pH 1.2 compare to buffer solution pH 7.4, and deionized water at pH 6.7. Swelling ratio raises with increase in PEGDMA concentration, but the presences of salt/ions solutions decreases the swelling ratio significantly and it depends on the charge of the ions. The kinetics of the swelling follows a second order non-linear rate equation. The rate of degradation revealed significant degradation in acidic medium and insignificant degradation was observed in basic medium. The encapsulation efficiency of quercetin introduced directly in the hydrogels during synthesis was found in the range of 85-94%. The release profile indicates the dependence of arabic gum grafted PEGDMA hydrogels on pH and compositions. The characteristic properties exhibited by the formulated hydrogels suggest the suitability of them to be applied as drug carriers.

Creating Awareness on Importance and Management of Soil by Rural Farmers in Nigeria: Role of Naerls Adopted Villages Project

Bashir Sani,Yusuf Abdullahi,Aliyu Ammani,Hajara Ahmadu,Adamu Yakubu,Ismail Ibrahim 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Statistical Optimization for Monacolin K and Yellow Pigment Production and Citrinin Reduction by Monascus purpureus in Solid-State Fermentation

( Jirasatid Sani ),( Montira Nopharatana ),( Panit Kitsubun ),( Taweerat Vichitsoonthonkul ),( Anan Tongta ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.3

Monacolin K and yellow pigment, produced by Monascus sp., have each been proven to be beneficial compounds as antihypercholesterolemic and anti-inflammation agents, respectively. However, citrinin, a human toxic substance, was also synthesized in this fungus. In this research, solidstate fermentation of M. purpureus TISTR 3541 was optimized by statistical methodology to obtain a high production of monacolin K and yellow pigment along with a low level of citrinin. Fractional factorial design was applied in this study to identify the significant factors. Among the 13 variables, five parameters (i.e., glycerol, methionine, sodium nitrate, cultivation time, and temperature) influencing monacolin K, yellow pigment, and citrinin production were identified. A central composite design was further employed to investigate the optimum level of these five factors. The maximum production of monacolin K and yellow pigment of 5,900 mg/kg and 1,700 units/g, respectively, and the minimum citrinin concentration of 0.26 mg/kg were achieved in the medium containing 2% glycerol, 0.14% methionine, and 0.01% sodium nitrate at 25oC for 16 days of cultivation. The yields of monacolin K and yellow pigment were about 3 and 1.5 times higher than the basal medium, respectively, whereas citrinin was dramatically reduced by 36 times.

Hydrogenation effects on the thermal and magnetic properties of mono- and bilayer graphene

Sohrabi Sani Shahdokht,Mousavi Hamze,Jalilvand Samira,Asshabi Moein 한국탄소학회 2021 Carbon Letters Vol.31 No.5

In the present study, the nearest-neighbor tight-binding model has been employed to calculate the density of states (DOS), electronic heat capacity (EHC), and Pauli magnetic susceptibility (PMS) of hydrogenated systems, namely monolayer graphone and graphane, bilayer graphone–graphene, and bilayer graphane–graphene. Then, the results have been compared with that of monolayer and simple bilayer graphene. It was found that the behaviors of hydrogenated systems difer from those of monolayer and bilayer graphene near the Fermi Level. Also, monolayer graphone and bilayer graphone–graphene exhibit a high peak near the Fermi level. Graphane monolayer, on the other hand, has no states around the Fermi level. Furthermore, bilayer graphane–graphone, similar to graphene, is a semimetal. Also, Schottky anomaly peaks in the EHC curves and crossovers in the PMS curves can be observed, which have divided the domain into two regions of low and high temperature. Compared to hydrogenated systems, the Schottky anomaly in graphene monolayer and bilayer graphene occurred at lower temperatures, while the PMS of monolayer graphone and bilayer graphone–graphene were faster than other systems in reaching the crossover. From the theoretical standpoint, these phenomena are due to the proportional relation of the PMS and EHC with the DOS.

MANAGING SALINITY PROBLEMS IN RICE FIELDS

K . Sani,M . D . Daham 한국농업기계학회 1993 ICAMPE 요약집 Vol.2 No.-

Use of Farmer Indigenous Knowledge to Strengthen Soil and Water Management Skills by Farmers in an Irrigation Scheme in Nigeria

Bashir Sani,Yusuf Abdullahi,Ibrahim Sambo,Adamu Yakubu,Ismail Ibrahim 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6