Proanthocyanidins were purified from avocado (Persea americana) fruit, and their structures analyzed by matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI-TOF MS) high-performance liquid chromatography-electrospray ionization-QTRAP (HPLC-ESI-QTRAP techniques. The results obtained (MS) analysis demonstrated that the proanthocyanidins homo- heteropolymers of procyanidins, prodelphinidins, propelargonidins, procyanidin gallate. From enzyme analysis, showed they...

Building change detection is important for urban area monitoring, disaster assessment and updating geo-database. 3D information derived from image dense matching or airborne light ranging (LiDAR) very effective building detection. However, combining data different sources challenging, so far few studies have focused on using both images LiDAR data. This study proposes an automatic method to detect changes in areas aerial First, carried out obtain point clouds then co-registered the iterative...

Given a set of high-resolution remote sensing images covering different scenes, we propose an unsupervised approach to simultaneously detect possible built-up areas from them. The motivation behind is that the frequently recurring appearance patterns or repeated textures corresponding common objects interest (e.g., areas) in input image data can help us discriminate others. With this inspiration, our method consists two steps. First, extract large corners each by improved Harris corner...

In the present study, essential oil from Cinnamomum camphora fruit peel was first separated and characterized by GC-MS. Solvent-free microwave-assisted extraction (SFME) performed to isolate oil, procedure optimized using a Box–Behnken design. The optimum SFME conditions yielded 80.35 ± 1.88 mg/g of with 76% moisture content, microwave irradiation power 420 W an time 22 min. No obvious difference observed between physical constants extracted hydrodistillation (HD). Scanning electron...

The characterization, anti-tyrosinase activity and cytotoxicity against B₁₆ mouse melanoma cells of proanthocyanidins purified from the fruit pericarp <italic>C. lansium</italic> are reported.

The ultrasonic-assisted extraction (UAE) method was employed to separate Cinnamomum camphora proanthocyanidin-rich extracts (PCEs). This process optimized by the Box–Behnken design, and optimal conditions, on a laboratory scale, were as follows: an ethanol concentration of 75%, liquid-to-solid ratio 24 mL/g, ultrasonic time 39 min, power 540 W. Under obtained PCE yield extracted UAE higher than that from heat reflux soaking extraction. An ultra-performance liquid chromatography–tandem mass...

Cinnamomum camphora chvar. Borneol is an important commercial tree species in China as its essential oil contains abundant endo-borneol. Hydrodistillation (HD) a mainstream technique for the separation of C. oil. The shortcomings HD include low extraction efficiency, high energy consumption, and long time, emphasizing need application fast efficient procedure recovering To determine optimal conditions effective extraction, solvent-free microwave-assisted (SFME) was used conjunction with...

The activities of ellagic acid in inhibiting mushroom tyrosinase and cell proliferation were evaluated this research. results enzyme kinetics indicated that could effectively inhibit activity. value the semi-inhibitory rate (IC50) was 0.2 ± 0.05 mM. Ellagic inhibited activity a reversible manner mixed inhibitor. Furthermore, had good inhibitory effect on mouse melanoma B16 cells induce apoptosis. acquired from fluorescence spectroscopy revealed interaction with depended hydrogen bond...

The objective of this study was to assess the structure, anti-tyrosinase activity, and mechanism proanthocyanidins extracted from Rhododendron pulchrum leaves. Results obtained mass spectra matrix-assisted laser desorption/ionization time-of-flight spectrometry (MALDI-TOF MS) high performance liquid chromatography electrospray ionization (HPLC-ESI-MS) revealed that were complex mixtures procyanidins, prodelphinidins, propelargonidins, their derivatives, among which procyanidins main...

Cinnamomum camphora leaf essential oil (CEO) was extracted using enzymatic-ultrasound pretreatment followed by microwave assisted extraction (EUP-MAE) method and simultaneously studied as a mycelial growth inhibitor against five important pathogens which cause potato dry rot. The optimum EUP-MAE conditions with real CEO yield of 19.23 ± 0.12 mg/g were obtained through Plackett–Burman design Box–Behnken follows: 3 % enzyme dosage, 2 h time, 5 pH, 210 W ultrasound power, 50 °C temperature, 16...

Cytochrome P450s are one of the most versatile oxidases that catalyze significant and unique chemical transformations for construction complex structural frameworks during natural product biosynthesis. Here, we discovered a set P450s, including SdnB, SdnH, SdnF, SdnE, cooperatively catalyzes reshaping inert cycloaraneosene framework to form highly oxidized rearranged sordarinane architecture. Among them, SdnB is confirmed be first P450 (or oxidase) cleaves C–C bond epoxy residue yield formyl...

Abstract Herb processing is a typical pharmaceutical preparation process for traditional Chinese medicine. After processing, its clinical applications and pharmacological effects vary greatly, which most commonly attributed to the changing chemical properties between raw herb processed products. In this work, total of 53 compounds were detected, among 17 identified as discriminatory chemicals wine‐processed Scutellaria baicalensis , 10 components markers with cumulative content contribution...

Attitude models play a prominent role in the geometric processing of high-resolution satellite imagery (HRSI). Because high accuracy matching algorithm, attitude oscillations can occur HRSI. Various methods for correcting this oscillation with parallax observations have been proposed. However, few researchers attempted to model from records or taken noise into consideration. In paper, penalized spline-based is proposed, which piecewise and continuously differentiable polynomials smooth out...