Dispersive liquid-liquid microextraction/HPLC techniques for determination of oxytetracycline and doxycycline residues in beef samples: method developments and statistical analysis by Muinat Aliu, Abibat Junaid, Abdulrahman Ibraheem, Aisha Ishaq, Abubakar Lawal, Kikelomo Ayeni`, Amudalat Lawal, Lukman Abdulra'uf

“… A rapid, cost-effective and environment-friendly sample pre-treatment method involving dispersive liquid-liquid microextraction (DLLME) and high-performance liquid chromatography (HPLC) was developed and applied for the extraction of oxytetracycline and doxycycline residues in beef samples (liver, kidney and muscle). …”
Get full text

Selective Spectrophotometric and Spectrofluorometric Methods for the Determination of Amantadine Hydrochloride in Capsules and Plasma via Derivatization with 1,2-Naphthoquinone-4-s... by Ashraf M. Mahmoud, Nasr Y. Khalil, Ibrahim A. Darwish, Tarek Aboul-Fadl

“…New selective and sensitive spectrophotometric and spectrofluorometric methods have been developed and validated for the determination of amantadine hydrochloride (AMD) in capsules and plasma. …”
Get full text

Establishment and Validation of Sensitive Liquid Chromatography–Tandem Mass Spectrometry Method for Aldosterone Quantification in Feline Serum with Reference Interval Determination... by Tommaso Furlanello, Francesca Maria Bertolini, Andrea Zoia, Jose Sanchez del Pulgar, Riccardo Masti

Get full text

Novel Green RP-HPLC Method for Simultaneous Determination of Sodium Diclofenac and Benzyl Alcohol as Bulk Mixtures and in Pharmaceutical Injectable Forms by Ola Mahmod Younes

“…Therefore, a new practical, accurate, and green RP-HPLC method was developed to determine Sodium Diclofenac and Benzyl Alcohol simultaneously in bulk and pharmaceutical injectable forms. …”
Get full text

Evaluation of two sample preparation methods for the determination of cadmium, nickel and lead in natural foods by Graphite Furnace Atomic Absorption Spectrophotometry by David Romero-Estévez, Gabriela S. Yánez-Jácome, Karina Simbaña-Farinango, Pamela Y Vélez-Terreros, Hugo Navarrete

“…This situation calls for the development of locally-applicable analytical methods for the determination of heavy metal concentrations in common vegetal and animal food products. …”
Get full text

A Novel Analysis Method for Simultaneous Determination of 31 Pesticides by High-Performance Liquid Chromatography-Tandem Mass Spectrometry in Ginseng by Xingang Hou, Liangyue Liu, Liping Wei, Da Feng, Meng Lv, Xiumei Wang, Xiaolong Yu, Zhongbin Lu, Zhiguang Hou

“…In this study, a novel analysis method was established for simultaneous determination of 31 pesticides in ginseng by high-performance liquid chromatography-mass spectrometry. …”
Get full text

Use of Environmental DNA to Determine Fantail Darter (Etheostoma flabellare) Density in a Laboratory Setting: Effects of Biomass and Filtration Method by Ramon A. Guivas, Ben F. Brammell

Get full text

MODELING OF A DUPLEX MILLER AND CONDITIONS OF FORMATION OF TREATMENT OF WHEEL PAIRS OF MAIN ELECTRIC CARDS, DUAL CARS, ELECTRO SECTIONS by Victor Shapovalov, Alexandr Permyakov, Alexander Klochko

“…The purpose of the work is to develop a modeling method for a special shaped cutter with increased productivity, designed to process the profile of locomotive railway wheels taking into account the shaping processes, which is based on the theory of modeling the high-speed milling process through the shaping efficiency coefficient. …”
Get full text

Pretreatment method of forchlorfenuron residues in loquat by HPLC analysis by YANG Chunping, LI Zhaojun, NING Hong, CHEN Huabao, GONG Guoshu, YANG Jizhi, ZHANG Min

“…Therefore, residue detection of forchlorfenuron in fruits and vegetables is imperative.High-performance liquid chromatography (HPLC) analysis is a common detection method. The suitable conditions for the extraction and purification of sample play an important role prior to HPLC analysis.In this study, the extraction efficiency of forchlorfenuron residues in loquat was compared using matrix dispersive solid phase extraction and QuEChERS (quick, easy, cheap, effective, rugged, safe).The results showed that QuEChERS was a more suitable pretreatment method for the determination of forchlorfenuron residues in loquat, because it had obviously higher average recoveries than the matrix dispersive solid phase extraction. …”
Get full text

Effectiveness of Using a Constant Coefficient in Combining Forecasts to Improve Forecasting Accuracy by A. A. Surkov

“…The purpose of the study is to determine the advantages and disadvantages of using a constant coefficient when combining forecasts based on available practical and theoretical data, as well as to form a unified approach to this issue. …”
Get full text

Distributions of non‐native and native plants are not determined by the same environmental factors by Bart Steen, Antoine Adde, Martin A. Schlaepfer, Antoine Guisan, Luigi Maiorano

“…In the framework of correlative species distribution models, we used newly developed methods for efficient automated selection of a parsimonious number of predictor environmental variables to determine which ones, out of a large candidate set in eight classes, have the strongest explanatory power for both species groups. …”
Get full text

Activity and diffusivity of oxygen in the liquid dilute BixSb1-x solutions by Jendrzejczyk-Handzlik D., Handzlik P., Fitzner K.

Get full text

Constructing enterprise pollution index and monitoring analysis using electricity big data by XI Zenghui, WANG Weibin, LU Jiaming, QU Haini

“…Based on the electricity source and pollutant emission structure of the enterprise, a pollution evaluation index system for the enterprise was constructed, and the importance scale and weight coefficient of each index were determined. The comprehensive index score was calculated using the entropy weight method, which reflected the risk or impact level of the enterprise in terms of pollutant emissions, environmental impact, and resource utilization. …”
Get full text

Development of gas chromatography-mass spectrometry detection procedure to determine fatty acids in special formula milk powder by Ning Wang, Xiaoqing Shao, Mengyao Huang, Cunfang Wang, Hua Jiang, Xiaoning Zhang

“…In conclusion, the proposed method enables the efficient and accurate detection of fatty acids in FSMPs.…”
Get full text

Quality Evaluation of Micro-Holes Processed by Efficient One-Step Femtosecond Laser Helical Drilling Method in Nickel-Based Superalloy by Mingquan Li, Yiyu Chen, Li Dong, Dan Liu, Xudong Sun

“…This research work details the main factors affecting the orifice and profile morphology of micro-holes processed by the one-step femtosecond laser helical drilling method. Cylindrical holes or even inverted cone holes can be obtained with the appropriate deflection angle and translation distance. …”
Get full text

An efficient harvesting strategy for agarwood based on the correlation analysis of resin formation and leaves dynamic changes induced by integrated induction method. by Jie Chen, Tianyu Gao, Yanhui Ge, Xiaodong Chen, Meirou Feng, Xiaoying Chen, Weimin Zhang, Xiaoxia Gao

Get full text

Efficient Concurrent Analysis of Mesotrione, Atrazine, Benoxacor and S-Metolachlor in Herbicide Formulate: Developing and Validating a Reversed-Phased HPLC Method by Anum Hafeez, Sajid Iqbal, Iffat Abdul Tawab Khan, Qurrat-ul-Ain

“…An effective, simple and reliable simultaneous determination method for four active compounds, mesotrione, benoxacor, atrazine and S-metolachlor, in herbicide formulate was first-time developed and substantiated in current study using reversed-phased high performance liquid chromatography, following ICH guidelines. …”
Get full text

Modelling height to crown base using non-parametric methods for mixed forests in China by Zeyu Zhou, Huiru Zhang, Ram P. Sharma, Xiaohong Zhang, Linyan Feng, Manyi Du, Lianjin Zhang, Huanying Feng, Xuefan Hu, Yang Yu

Get full text

Investigating Advanced Approaches Based on Iso-Absorptivity Coefficient in Unresolved Spectral Signals of Binary Mixtures by Hayam M. Lotfy, Sarah S. Saleh

“…This work introduced an investigation concerning the efficiency power of recent methods based on iso-absorptivity coefficient in different spectral signals. …”
Get full text

Fast grouping fusion method of dual carbon monitoring data based on DBSCAN clustering algorithm by Rui Ma, Jiangbo Sha, Shuang Zhang, Dongge Zhu, Wenni Kang, Jia Liu

Get full text