全文获取类型
收费全文 | 202篇 |
免费 | 21篇 |
国内免费 | 1篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 83篇 |
金属工艺 | 3篇 |
机械仪表 | 3篇 |
建筑科学 | 4篇 |
能源动力 | 9篇 |
轻工业 | 54篇 |
水利工程 | 1篇 |
无线电 | 9篇 |
一般工业技术 | 30篇 |
冶金工业 | 2篇 |
原子能技术 | 2篇 |
自动化技术 | 23篇 |
出版年
2024年 | 4篇 |
2023年 | 5篇 |
2022年 | 7篇 |
2021年 | 11篇 |
2020年 | 11篇 |
2019年 | 9篇 |
2018年 | 14篇 |
2017年 | 14篇 |
2016年 | 7篇 |
2015年 | 9篇 |
2014年 | 7篇 |
2013年 | 24篇 |
2012年 | 17篇 |
2011年 | 23篇 |
2010年 | 11篇 |
2009年 | 7篇 |
2008年 | 5篇 |
2007年 | 8篇 |
2006年 | 12篇 |
2005年 | 5篇 |
2004年 | 6篇 |
2003年 | 1篇 |
2002年 | 2篇 |
2000年 | 1篇 |
1995年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1975年 | 1篇 |
排序方式: 共有224条查询结果,搜索用时 15 毫秒
221.
Didar Sevim Oya Köseoğlu Durmuş Özdemir Mehmet Hakan Elif B. Büyükgök Hatice Uslu Özgür Dursun M. Kerem Savran Önder Eralp Serkan Kaptan Halil Köktürk Özlem Asker Sibel Pazarlı Melike Ayaztek Nurdan Akbaş Serkan Yalçın Pınar Çakır Topdemir 《Journal of the American Oil Chemists' Society》2023,100(3):197-213
Virgin olive oils (VOOs) obtained from olives grown in different regions of Turkey under changing climatic conditions sometimes show different sensory and chemical properties. This study was planned to determine whether these deviations are due to climatic changes or not. For this purpose, five different olive varieties (Ayvalık, Memecik, Gemlik, Nizip Yağlık, Kilis Yağlık) of commercial importance were harvested from the provinces/districts (four different region) where cultivation is intense during the 2017/2018–2020/2021 harvest years. Every year, olive samples were collected from 3 orchards from 13 provinces/districts. One hundred and fifty-six samples were subjected to the purity, quality and sensory analysis. Basic climatic values (average, minimum and maximum temperature, humidity and precipitation) were examined for four consecutive years. All of the examined olive oil samples were determined within the legal limits in terms of fatty acid composition and fatty acid ethyl ester values. However, delta-7-stigmastenol value from the sterol composition was found to be above 0.5% in some samples in all the years studied (total 21 samples). Delta-7-stigmastenol values of olive oil samples varied between 0.16% and 1.14%. Multiple linear regression analysis was applied using a genetic algorithm-based inverse least squares method to determine whether there is a relationship between climate data and delta-7-stigmastenol values. According to this result, it has been determined that the delta-7-stigmastenol value is high when the annual average relative humidity is low and the annual average temperature is high. There is an urgent need to make forward-looking plans due to climate change. 相似文献
222.
223.
Elçin Emekdar Hatice Açikgöz-Tufan Umut Kıvanç Şahin Senem Kurşun Bahadir Burak Tuluk Adnan Nail Şimşek 《Coloration Technology》2023,139(2):209-218
Lean manufacturing methods are concerned with simplifying the production process and thus maximising efficiency and minimising wastage. All production processes contain several steps, which include sub-steps such as cleaning and changing devices and preparing the production areas for later steps. Most of these sub-steps require that machines are stopped and therefore they must be performed as quickly as possible. This downtime causes a decrease in efficiency, while increasing the costs and production time. Single-Minute Exchange of Dies (SMED) is a lean manufacturing strategy that has been applied successfully in many sectors to minimise excessive downtime. In this study, the SMED technique is applied in a textile screen-printing company for the case of changing the screens between each design. The steps are evaluated and designated as either external steps, which are performed without downtime, or internal steps, which take place during downtime. The number of external steps is increased while being decreased for internal steps. Also, the production time decreased by 54% and a 32% increase in efficiency was achieved during the screen-printing production of a sample t-shirt. 相似文献
224.
Elif Yıldız Gül Dr. Elanur Aydın Karataş Hatice Aydın Doğan Prof. Ömer Faruk Karataş Prof. Bünyemin Çoşut Prof. Esra Tanrıverdi Eçik 《ChemMedChem》2023,18(2):e202200439
Photodynamic therapy (PDT) is an innovative, non-invasive and highly selective therapeutic modality for tumours and non-malignant diseases. BODIPY based molecules can function as new generation photosensitizers (PSs) in various PDT applications. Despite numerous conjugated PS systems are available, BODIPYs containing erlotinib lagged behind other photosensitizer units. In this study, smart photosensitizers containing BODIPY, erlotinib and hydrophilic units were prepared for the first time, their physicochemical properties and PDT effects were investigated. Compared with non-halogenated compound, halogenated derivatives possessed much lower fluorescence profile as well as the good ROS generation ability under red light. In vitro PDT studies were performed on both healthy (PNT1a) and prostate cancerous cells (PC3) to determine the selectivity of the compounds on cancerous cells and their effects under light. The halogenated conjugates, exposed to low dose of light illumination exhibited potent activity on cancer cell viability and the calculated IC50 values proved the high phototoxicity of the photosensitizers. It was also determined that the PSs have very low dark toxicity and that the light illumination and ROS formation are required for the initiation of the cell death mechanism. As a result, erlotinib modified BODIPYs could serve as promising agents in anticancer photodynamic therapy. 相似文献