Relationship of Body Weight, Testes Biometry and Sperm Production in Broiler Breeder

Riaz,Aleem,Izaj 한국가금학회 2006 韓國家禽學會誌 Vol.33 No.2

The objective of this study was to elucidate the basis for the difference in sperm production of broiler breeders. Nine sexually mature Hubbard broiler breeder males, 35 weeks of age, were trained for two weeks for semen collection on alternate days by abdominal massage technique. Following the training, the breeder males were collected daily for five successive days. The males were then classified as low or high sperm producers. The mean body weights of individual males were also recorded on the basis of body weight at the start and end of the experiment. Immediately after last collection the males were slaughtered and testes biometry was determined. Daily sperm output of individual males varied from 0.21×109 to 2.64×109 sperm. The daily sperm production of low sperm producer males was lower (0.47 ± 0.13 vs. 2.06 ± 0.20 × 109; P < 0.05) than high sperm producer males. Testes weight of low sperm producer males was lower (6.32 ± 1.6 vs. 20.33 ± 4.76 gm; P < 0.05) than high sperm producer males. Moreover the testis weight of high sperm producer males was 3.22 times higher than low sperm producer males. The average body weight of high sperm producer males was higher (4,389 ± 116.3 vs. 3,960 ± 131.77 gm; P > 0.05) than low sperm producer males. The correlation coefficients indicate significantly positive correlation of body weight (P < 0.05) and testes weight (P < 0.01) on semen volume, sperm concentration and daily sperm production.

Controls on Microbial Activity in Chromium Contaminated Abandoned Agricultural Soils: A Case Study of Kasur, Pakistan

Muhammad Riaz,Rabia Parveen,Muhammad Saleem Arif,Mehnaz Roohi,Shermeen Tahir,Muhammad Atif Riaz,Muhammad Ibrahim,Sabir Hussain,Shafaqat Ali,Tahira Yasmeen,Tanvir Shahzad,Leon Van Den Berg,Farhat Abbas 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Carbon-, Binder-, and Precious Metal-Free Cathodes for Non-Aqueous Lithium–Oxygen Batteries: Nanoflake-Decorated Nanoneedle Oxide Arrays

Riaz, Ahmer,Jung, Kyu-Nam,Chang, Wonyoung,Shin, Kyung-Hee,Lee, Jong-Won American Chemical Society 2014 ACS APPLIED MATERIALS & INTERFACES Vol.6 No.20

<P>Rechargeable lithium–oxygen (Li–O<SUB>2</SUB>) batteries have higher theoretical energy densities than today’s lithium-ion batteries and are consequently considered to be an attractive energy storage technology to enable long-range electric vehicles. The main constituents comprising a cathode of a lithium–oxygen (Li–O<SUB>2</SUB>) battery, such as carbon and binders, suffer from irreversible decomposition, leading to significant performance degradation. Here, carbon- and binder-free cathodes based on nonprecious metal oxides are designed and fabricated for Li–O<SUB>2</SUB> batteries. A novel structure of the oxide-only cathode having a high porosity and a large surface area is proposed that consists of numerous one-dimensional nanoneedle arrays decorated with thin nanoflakes. These oxide-only cathodes with the tailored architecture show high specific capacities and remarkably reduced charge potentials (in comparison with a carbon-only cathode) as well as excellent cyclability (250 cycles).</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2014/aamick.2014.6.issue-20/am504463b/production/images/medium/am-2014-04463b_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am504463b'>ACS Electronic Supporting Info</A></P>

Regenerating the Pulp–Dentine Complex Using Autologous Platelet Concentrates: A Critical Appraisal of the Current Histological Evidence

Riaz Amna,Shah Furqan A. 한국조직공학과 재생의학회 2021 조직공학과 재생의학 Vol.18 No.1

Autologous platelet concentrates such as platelet-rich plasma (PRP) and platelet-rich fibrin (PRF) have gained overwhelming popularity in regenerative endodontics. Clinical evidence reveals the lack of a particular advantage of using PRP or PRF over an evoked blood clot in promoting canal wall thickening and/or continued root development in immature necrotic teeth. Moreover, despite stimulating tissue repair and repopulating the root canals of immature and mature permanent teeth, the new vital tissue may not possess the functional activity of the native pulp tissue.To better understand the origin, nature, and long-term fate of the tissue types found within the pulp space, we critically examine all available histo-/morphological evidence for pulp–dentine complex regeneration using PRP and/or PRF, alone or together with an evoked blood clot, specialised or unspecialised primary cells, and other biomaterials.Histological data from clinical studies is scant. Reportedly, the inner dentinal surface supports cementum-like tissue formation, but this interface likely deviates in structure and function from the native cementodentinal junction. Presence of bone-like tissue within the pulp space is intriguing since de novo osteogenesis requires closely coordinated recruitment and differentiation of osteoprogenitor cells. Compared to untreated necrotic teeth, an evoked blood clot (with/without PRF) improves fracture resistance. Tooth regeneration using PRF and dental bud cells is unreliable and the constituent neoformed tissues are poorly organised.PRP/PRF fail to demonstrate a significant advantage over an induced blood clot, alone. The true nature of neoformed tissues remains poorly characterised while their response to subsequent insult/injury is unexplored.

Comparative study of enhanced catalytic properties of clay-derived SiO2 catalysts for biodiesel production from waste chicken fat

Riaz Iqra,Qamar Obaid Ali,Jamil Farrukh,Hussain Murid,Inayat Abrar,Rocha-Meneses Lisandra,Akhter Parveen,Musaddiq Sara,Karim Muhammad Ramzan Abdul,박영권 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.11

The use of biodiesel is a proactive measure that can be implemented to reduce emissions of greenhouse gases and other adverse environmental impacts. However, one of the major setbacks to biodiesel production is its relatively higher cost compared to petroleum diesel. The optimistic solution to this is valorization of biomasses like waste chicken fat (WCF) and clay for deriving non-edible oil and catalyst respectively. Herein, we report the synthesis of clay derived SiO2 catalyst impregnated with SrO, Bi2O3, CuO and CaO. The developed catalysts were characterized by FTIR, XRD, and SEM. XRD studies confirmed the successful impregnation of active metallic oxide on SiO2 support. Further, these catalysts were employed for biodiesel production from WCF, and SrO/SiO2 was found to be most effective and efficient catalyst for biodiesel production from WCF. Hence, SrO/SiO2 was adapted to optimize the different transesterification reaction parameters such as methanol to oil ratio, catalyst loading, reaction temperature and time. The optimized conditions for maximum biodiesel yield 98.9% were found to be 65 °C in 1 h with 12:1 methanol to oil ratio and 1 wt% catalyst loading. The biodiesel produced was also analyzed by GC-MS. The obtained biodiesel yield shows that clay can be a potential, and cost-effective, catalyst source to produce biodiesel from WCF.

Self-assembled nitrogen-doped graphene quantum dots (N-GQDs) over graphene sheets for superb electro-photocatalytic activity

Riaz, Rabia,Ali, Mumtaz,Sahito, Iftikhar Ali,Arbab, Alvira Ayoub,Maiyalagan, T.,Anjum, Aima Sameen,Ko, Min Jae,Jeong, Sung Hoon Elsevier BV * North-Holland 2019 Applied Surface Science Vol.480 No.-

<P><B>Abstract</B></P> <P>Nitrogen-doped graphene quantum dots (N-GQDs) are emerging electroactive and visible light active organic photocatalysts, known for their high stability, catalytic activity and biocompatibility. The edge surfaces of N-GQDs are highly active, however, when N-GQDs make the film the edges are not fully exposed for catalysis. To avoid this issue, the N-GQDs are shaped to branched leaf shape, with an extended network of voids, offering highly active surfaces (edge) exposed for electrocatalytic and photocatalytic activity. The nitrogen doping causes a decrease in the bandgap of N-GQDs, thus enabling them to be superb visible light photocatalyst, for degradation of Methylene blue dye from water. Photoluminescence results confirmed that by a synergistic combination of the highly conductive substrate; Carbon fabric coated graphene sheets (CF-rGO) the recombination of photogenerated excitons is significantly suppressed, hence enabling their efficient utilization for catalysis. Comparatively, uniformly coated N-GQDs showed 49.3% lower photocatalytic activity, owing to their hidden active sites. The degradation was further boosted by 30% by combining the electrocatalytic activity, i.e. electro-photocatalysis of the proposed electrode. The proposed electrode material was analyzed using TEM, FE-SEM, FTIR, AFM, and WA-XRD, whereas the stability of electrode was confirmed by TGA, tensile test, bending test, and in harsh chemical environments. The proposed photo-electrocatalyst electrode is binder-free, stable, flexible and highly conductive, which makes the electrode quite suitable for flexible catalytic devices like flexible solar cells and wearable supercapacitors.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A flexible electrode is fabricated using self-assembled overlayer of Nitrogen doped Graphene Quantum Dots (N-GQDs). </LI> <LI> Self-assembeled highly porous leaflets structure has maximum exposed edge surfaces to accelarate the catalytic reaction. </LI> <LI> The proposed electrode is metal free and is stable at high temperature, harsh chemical environments, and mechanical stresses. </LI> <LI> The surface resistance of the all carbon electrode is only 2.5 Ω sq.<SUP>−1</SUP>. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Nitrogen doped graphene quantum dots (N-GQDs) were self-assembled (with high porosity) on reduced graphene oxide coated carbon fabric to fabricate a highly stable visible light photocatlytically and electrocatalytically active flexible electrode for water treatment.</P> <P>[DISPLAY OMISSION]</P>

Bringing Handhelds to the Grid Resourcefully: A Surrogate Middleware Approach

Riaz, M.,Kiani, S. L.,Shehzad, A.,Lee, S. SPRINGER-VERLAG 2005 ICHIT 2012 Vol.3481 No.-

Projected Predictive Energy-Bounding Approach for Multiple Degree-of-Freedom Haptic Teleoperation

Riaz Uddin,박상수,박성준,류제하 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.6

This paper presents a geometrically and dynamically transparent projected predictive Energy-BoundingApproach (EBA) for multiple degree-of-freedom (m-DOF) haptic teleoperation with time delays. The straightforwardextension of a single-DOF teleoperation to m-DOF teleoperation suffers from a bad force distortion problemthat becomes worse with the increase in communication time delays between master and slave sites. Due to this,geometry perception of remote m-DOF objects at master site is severely deteriorated. To solve this problem, aprojected predictive m-DOF EBA is proposed by combining the m-DOF Predictive EBA and the projection methodthat can compensate the force distortion problem. The proposed approach also includes steps to get stably theinformation about the contact locations (geometry) of m-DOF remote objects without geometry detection sensors. In order to validate the proposed approach, some experiments performing surface contour-following are conductedusing two Phantoms: (i) 2-DOF object (bobbin), and (ii) 3-DOF semi-spherical object in the presence of large timedelays.

A robust multimedia authentication and restoration scheme in digital photography

Riaz, Sidra,Lee, Sang-Woong Springer-Verlag 2014 MULTIMEDIA TOOLS AND APPLICATIONS Vol.73 No.3

Ethernet‑Based Fault Diagnosis and Control in Smart Grid: A Stochastic Analysis via Markovian Model Checking

Riaz Uddin,Ali S. Alghamdi,Muhammad Hammad Uddin,Ahmed Bilal Awan,Syed Atif Naseem 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.6

The fault diagnosis and control through fault detection, isolation and supply restoration (FDIR) technique is the part of a commonly used distribution management system application in smart grid. When the fault occurs, it becomes essential to detect and isolate the faulty section of the distribution network at once and then restore back to its running condition through tie switches. The communication between IEDs is done through diferent communication mediums such as Ethernet, wireless, power line communication etc. Therefore, formal analysis of the FDIR mechanism is required with communication network (ideally Ethernet), which helps us to predict the behavior of FDIR response upon the occurrence of fault in terms of various important probabilities, reliability study and efciency (showing the system will work properly). In this regard, for the above said analyses, this article discusses (a) the development of the Markovian model of FDIR for distribution network of smart grid considering Tianjin Electric Power Network as case study with intelligent electronic devices (IEDs) using ideal communication medium (Ethernet); (b) utilized probabilistic model checker (PRISM tool) to predict the probabilities; (c) perform the reliability analyses and (d) study the efciency of FDIR behavior for future grid using logical properties. The detailed analysis and prediction (done for the fault occurrence scenario) mainly focus in determining the (1) the probability of switching failures of FDIR in smart grid; (2) the probability of isolating the defective switch from the system within limited time and (3) the probability of restoring the system automatically within the minimum possible interval.