Penggunaan metil paraben sebagai pengawet telah banyak digunakan pada berbagai bidang industri, antara lain: industri makanan, kosmetik, dan farmasi dengan batas penggunaan yang diatur oleh setiap negara lembaga. Sampai saat ini, pengukuran umum dilakukan adalah menggunakan spektrofotometri UV/Vis HPLC, namun kedua metode tersebut membutuhkan waktu preparasi analisis cukup lama. Metode alternat...

In this article, a novel Co3O4@TiO2 composite is synthesized by applying two-step methods. ZIF-67 and used as template for the synthesis of composite. The designed using effective photocatalytic properties Co3O4 TiO2. resulting supposed to offer superior compared their counterparts. characterized powder X-ray diffraction (PXRD), Brunauer–Emmet–Teller (BET), atomic force microscopy (AFM), scanni...

با توجه به رشد بالای جمعیت در جهان و نیاز اطمینان از امنیت غذایی، افزایش تولید واحد سطح محصولات زراعی به‌منزلة راهبردی اساسی حل مسئلة تأمین غذا به‌شمار می‌رود. سوی دیگر، وجود محدودیت زیرکشت پایین‌بودن میانگین عملکرد برخی کشاورزی مانند گندم کشور، محصول می‌تواند راهکاری عملی پاسخ کشور محسوب شود. یکی مهم‌ترین بیماری‌های فوزاریوم است که، نقش پیش‌بینی این بیماری جلوگیری کاهش بهره‌وری محصول، مدل‌هایی...

a r t i c l e i n f o Polarization curves from microbial fuel cells (MFCs) often show an unexpectedly large drop in voltage with increased current densities, leading to a phenomenon in the power density curve referred to as " power overshoot ". Linear sweep voltammetry (LSV, 1 mV s − 1) and variable external resistances (at fixed intervals of 20 min) over a single fed-batch cycle in an MFC both...

We study the influence of the junction size in ferromagnet (FM)/semiconductor (SC) contacts on four-terminal nonlocal spin signals in SC-based lateral spin-valve (LSV) structures. When we use FM/Ge Schottky-tunnel junctions with relatively low resistance-area products, the magnitude of the nonlocal spin signal depends clearly on the junction size, indicating the presence of the spin absorption ...

Update of acoustic and language models is vital to maintain performance of automatic speech recognition (ASR) systems. To alleviate efforts for updating models, we propose a “semi-automated” framework for the ASR system of the Japanese National Congress. The framework consists of our speaking-style transformation (SST) and lightly-supervised training (LSV) approaches, which can automatically ge...

An exfoliated graphite-polystyrene composite electrode was evaluated as an alternative electrode in the oxidation and the determination of oxalic acid in 0.1 M Na2SO4 supporting electrolyte. Using CV, LSV, CA procedures, linear dependences I vs. C were obtained in the concentrations range of oxalic acid between 0.5 to 3 mM, with LOD =0.05 mM, and recovery degree of 98%, without need of surface ...

The electrocatalytic activity characterization of the oxygen reduction reaction (ORR) is commonly characterized using a rotating disk electrode (RDE) with linear sweep voltammetry (LSV) or cyclic (CV) measurements. Despite wide application this method in literature, its reproducibility and comparability are rarely mentioned articles. LSV CV sensitive to experimental conditions, thus significant...

Invariance under Lorentz transformations is fundamental to both the standard model and general relativity. Testing Lorentz-symmetry violation (LSV) via atomic systems attracts extensive interests in theory experiment. Some recent proposals for testing LSV present that effects of can be described as a local interaction. Further, test precision enhanced quantum entanglement its Fisher information...