http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Ahammad, A. J. Saleh,Islam, Tamanna,Hasan, Md. Mahedi,Mozumder, M. N. Islam,Karim, Rejwana,Odhikari, Noyon,Pal, Poly Rani,Sarker, Subrata,Kim, Dong Min The Electrochemical Society 2018 Journal of the Electrochemical Society Vol.165 No.5
<P>A novel electrochemical sensor was fabricated by simply screen printing reduced graphene oxide (rGO) paste on F-doped tin oxide (FTO) (rGO-SP-FTO) followed by sintering at 450 degrees C in Argon and employed for detecting dopamine (DA) and uric acid (UA) simultaneously. The rGO film was characterized by using Raman spectroscopy, field emission scanning electron microscope (FE-SEM), and Fourier transform infrared spectroscopy (FTIR). The surface sensing features of rGO-SP-FTO were studied with electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The rGO-SP-FTO electrode exhibited foremost sensitivity in simultaneous detection of DA and UA without any interference from ascorbic acid (AA). The rGO-SP-FTO electrode showed a good linear response in the range of 0.5-50.0 mu M and 5.0-300 mu M with detection limits (S/N = 3) of 0.07 mu M and 0.39 mu M for DA and UA, respectively. The interactions between screen printed rGO with FTO electrode and their influence on how rGO-SP-FTO electrode interacted with UA, DA, and AA were analyzed from experimental observations. The rGO-SP-FTO electrode was able to detect DA in dopamine hydrochloride injection (DAI) and UA in urine sample effectively. Moreover, the designed electrochemical sensor exhibited excellent stability and reproducibility. (C) 2018 The Electrochemical Society.</P>
Ahammad, A. J. Saleh,Hasan, Md. Mahedi,Islam, Tamanna,Al-Shehri, Mohammod Oudah,Anju, Anjuman Nesa,Alam, Md. Kawsar,Kim, Jong-Pil,Qasem, Mohammed Ameen Ahmed,Aziz, Md. Abdul The Royal Society of Chemistry 2018 NEW JOURNAL OF CHEMISTRY Vol.42 No.6
<P>A highly selective and sensitive electrochemical method was developed for the detection of dopamine (DA), based on a gold nanoparticle (AuNP)-coated taro carbon (TC)-modified glassy carbon electrode (AuNP-TC/GCE). This novel AuNP-TC material was simply prepared by carrying out a pyrolysis of a composite material obtained by treatment of an acid-treated taro stem powder with HAuCl4. Transmission electron microscopy (TEM), Raman spectroscopy, field-emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD) were employed to characterize the AuNP-TC material. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were used to characterize the modified electrode. The modified GCE exhibited a well-defined current response only toward the electrochemical oxidation of DA in a mixture solution of ascorbic acid (AA), DA, and uric acid (UA). This designed electrochemical sensor showed a linear response in the concentration range of 0.5 μM to 250 μM DA and a sensing limit (S/N = 3) of 0.25 μM was found. The sensor was also able to successfully detect DA in a dopamine hydrochloride injection (DAI). Moreover, the sensor exhibited excellent stability and reproducibility.</P>
Ahammad, Muslah U.,Okamoto, S.,Kawamoto, Yasuhiro,Nakada, T. Asian Australasian Association of Animal Productio 2011 Animal Bioscience Vol.24 No.9
The objective of this study was to examine the binding potential of sperm to the epithelium of the sperm storage tubules (SST) in vitro and in vivo to assess the functional maturation of fowl sperm. Sperm from the testis, epididymis, as well as the proximal, middle and distal vas deferens were incubated in vitro with either the uterovaginal junction (UVJ)- or infundibular tissue containing SST at $39^{\circ}C$ for 30 min. Aliquots of sperm were also artificially inseminated into the uteri of hens, and the UVJ and infundibulum were collected 24 h post artificial insemination (AI). After incubation and AI, tissues were washed to remove loosely adhered sperm and subjected to fluorescence staining with 4', 6-diamidino-2-phenylindole, dihydrochloride (DAPI) for counting the number of bound sperm per 0.25 mm2 of surface area. Sperm from the testis, epididymis, and the three segments of the vas deferens exhibited their differential (p<0.05) binding capacity, which increased gradually from the testicular to distal vas deferens sperm under both in vitro and in vivo conditions. Existing similar trend, sperm, regardless of their source had a lesser affinity to bind to the epithelium of the infundibular SST than to the UVJ-SST. These experimental results suggested that fowl sperm may undergo gradual changes in the process of functional maturation, whereby they gain the ability to bind to the epithelium of the SST during their passage through the male reproductive tract (MRT).
Ahammad Golam Sagir,김인호 충남대학교 농업과학연구소 2024 Korean Journal of Agricultural Science Vol.51 No.1
We conducted this research to examine the reducing level of lysine : tryptophan ratios in the diet affected the performance and meat quality of finishing pigs. At the end of the experiment, 144 crossbred finishing pigs (Duroc × [Yorkshire × Landrace]) having an average body weight of 70.6 ± 3.9 kg were randomly assigned to four dietary treatments (9 replications, 4 pigs per pen). The pigs in the 4 treatments were fed diets with different lysine : tryptophan ratios, such as 1 : 0.175, 1 : 0.160, 1 : 0.145, and 1 : 0.130. In considering average daily gain (ADG), average daily feed intake (ADFI), and feed conversion ratio (FCR), the ratio of tryptophan and lysine (Lys : Trp) did not show any significant effect (p > 0.05). Moreover, nutrient digestibility had no significant impact (p > 0.05). However, the decreasing level of tryptophan linearly decreased the back-fat thickness at overall period (p = 0.038) and reduced at week 5 (p = 0.007). Additionally, the lean meat percentage (LMP) showed a tendency to increase at initial (linear effect, p = 0.097) and increased at overall period (linear effect, p = 0.045). Therefore, we suggest that Lys : Trp ratio of 0.130 could enhance the meat quality in finishing pigs.
Ahammad, A.J. Saleh,Pal, Poly Rani,Shah, Syed Shaheen,Islam, Tamanna,Mahedi Hasan, Md.,Qasem, Mohammed Ameen Ahmed,Odhikari, Noyon,Sarker, Subrata,Kim, Dong Min,Abdul Aziz, Md. Elsevier 2019 Journal of Electroanalytical Chemistry Vol.832 No.-
<P><B>Abstract</B></P> <P>Aiming at constructing a new nonenzymatic electrochemical nitrite sensor, we have prepared a screen-printed fluorine-doped tin oxide (FTO) electrode with activated jute carbon paste (AJCP) (AJCP-SP-FTO) synthesized from jute (<I>Corchorus</I> genus) sticks by using ZnCl<SUB>2</SUB> as activating agent and subsequent carbonizing at 850°C. Surface morphology, textural properties, chemical composition and nature of pores of AJC were studied by FE-SEM, XRD, EDS, Raman spectroscopy and BET analysis. The surface area of the AJC was found to be 1452.4m<SUP>2</SUP>/g with an average pore diameter of 2.6nm obtained from a BJH pore-size distribution curve. Electron transfer capacity at the interface of the AJCP material screen-printed FTO was studied by cyclic voltammetry (CV) and EIS techniques. The AJCP-SP-FTO sensor was used for amperometric detection of nitrite. The limit of detection (LOD) for nitrite oxidation was found to be 437nM for the proposed sensor. The sensitivity of AJCP-SP-FTO toward nitrite was 863.71μAmM<SUP>−1</SUP> cm<SUP>−2</SUP>. From the analysis of electrochemical data, the effective surface area of the AJCP-SP-FTO was 0.12cm<SUP>2</SUP>. We proposed a mechanism for sensitive detection of nitrite based on analysis of experimental findings of spectroscopic and electroanalytical techniques. We further utilized the proposed sensor for analyzing nitrite in tap water. The AJCP-SP-FTO electrode showed good reproducibility and stability.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Activated jute carbon (AJC) material was prepared by using ZnCl<SUB>2</SUB> as activating agent. </LI> <LI> Surface morphology, textural properties, chemical composition and nature of pores of AJC were studied. </LI> <LI> A novel AJC paste screen printed FTO electrode was constructed for nonenzymatic electrochemical determination of nitrite. </LI> <LI> The detection limit and sensitivity of nitrite were calculated to be 437 nM and 863.71 μA μM<SUP>-1</SUP> cm<SUP>-2</SUP>, respectively. </LI> <LI> A mechanism for detection of nitrite was proposed based on analysis of spectroscopic and electroanalytical techniques. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Simultaneous Determination of Hydroquinone and Catechol at an Activated Glassy Carbon Electrode
Ahammad, A. J. Saleh,Sarker, Subrata,Rahman, Md Aminur,Lee, Jae-Joon WILEY-VCH Verlag 2010 Electroanalysis Vol.22 No.6
<P>A selective and very simple electrochemical method, based on anodization of a glassy carbon electrode (GCE), was developed for the simultaneous detection of hydroquinone (HQ) and catechol (CT). It was found that the activated GCE showed an excellent catalytic behavior and enhanced reversibility towards the oxidation of both HQ and CT. The redox responses from the mixture of HQ and CT were easily resolved at an activated GCE. The detection limits for HQ and CT were calculated to be 0.16 and 0.11 μM, respectively. The activated GCE was successfully examined for real sample analysis with tap water and it showed a stable and reliable recovery data.</P>