全文获取类型
收费全文 | 141篇 |
免费 | 8篇 |
专业分类
化学工业 | 30篇 |
机械仪表 | 1篇 |
能源动力 | 1篇 |
轻工业 | 111篇 |
一般工业技术 | 3篇 |
自动化技术 | 3篇 |
出版年
2023年 | 2篇 |
2022年 | 7篇 |
2021年 | 12篇 |
2020年 | 4篇 |
2019年 | 3篇 |
2018年 | 4篇 |
2017年 | 3篇 |
2016年 | 2篇 |
2015年 | 6篇 |
2014年 | 2篇 |
2013年 | 9篇 |
2012年 | 7篇 |
2011年 | 8篇 |
2010年 | 9篇 |
2009年 | 9篇 |
2008年 | 8篇 |
2007年 | 12篇 |
2006年 | 9篇 |
2005年 | 5篇 |
2004年 | 6篇 |
2002年 | 6篇 |
2000年 | 3篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 4篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
排序方式: 共有149条查询结果,搜索用时 15 毫秒
1.
Sandra Horvitz María J. Cantalejo 《International Journal of Food Science & Technology》2012,47(9):1935-1943
The effects of chlorine (200 μL L?1), ozonated water (1 μL L?1) and gaseous ozone (0.7 μL L?1) on physicochemical attributes and microbial quality of minimally processed red bell peppers were studied. In all the experiments, O2 continuously decreased and CO2 concentration increased, the pH augmented and a significant softening was observed in all the fruits. By day 14, L* values decreased in all the fruits, with the greatest changes found in the chlorinated samples (approximately 12 units). Peppers treated with the aqueous solutions showed greater changes in the quality attributes with increasing washing times and especially when chlorine was used. The exposure for three min to gaseous O3 reduced the mesophiles, psychrotrophes and fungal populations of the fresh‐cut peppers in 2.5, 3.3 and 1.8 log units, respectively. Combined with modified atmosphere, this could be an appropriate method to maintain the quality and extend the storage period of minimally processed red bell peppers. 相似文献
2.
Ji-Su Kwon Jae-Young Nam Seon-In Yeom Won-Hee Kang 《International journal of molecular sciences》2021,22(5)
Bacterial wilt (BW) disease from Ralstonia solanacearum is a serious disease and causes severe yield losses in chili peppers worldwide. Resistant cultivar breeding is the most effective in controlling BW. Thus, a simple and reliable evaluation method is required to assess disease severity and to investigate the inheritance of resistance for further breeding programs. Here, we developed a reliable leaf-to-whole plant spread bioassay for evaluating BW disease and then, using this, determined the inheritance of resistance to R. solanacearum in peppers. Capsicum annuum ‘MC4′ displayed a completely resistant response with fewer disease symptoms, a low level of bacterial cell growth, and significant up-regulations of defense genes in infected leaves compared to those in susceptible ‘Subicho’. We also observed the spreading of wilt symptoms from the leaves to the whole susceptible plant, which denotes the normal BW wilt symptoms, similar to the drenching method. Through this, we optimized the evaluation method of the resistance to BW. Additionally, we performed genetic analysis for resistance inheritance. The parents, F1 and 90 F2 progenies, were evaluated, and the two major complementary genes involved in the BW resistance trait were confirmed. These could provide an accurate evaluation to improve resistant pepper breeding efficiency against BW. 相似文献
3.
Monica Rosa Loizzo Marco Bonesi Annalisa Serio Clemencia Chaves-López Tiziana Falco Antonello Paparella 《International Journal of Food Properties》2017,20(4):899-910
Capsicum annum cultivars Yellow cayenne, Portafortuna, Idealino, Sole, Duemila, Pellegrino, Fantasia, Loco, and Effix were investigated for their antioxidant properties and foodborne pathogens inhibitory activity. The total phenols, flavonoids, anthocyanins, capsaicinoids, carotenoids, ascorbic acid, and vitamin E content were also determined. Duemila and Portafortuna cultivars showed the highest total phenol content with values of 924.3 and 935.0 mg of chlorogenic acid equivalents/100 g dried weight, respectively. Idealino pepper presented the highest capsaicin content (2932.1 μg/g dried weight). The antioxidant capacity was evaluated by using 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid test, 2,2-diphenyl-1-picrylhydrazyl test, and ferric reducing ability power assay. Both Pellegrino and Idealino samples exhibited a promising radical scavenging ability against 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid radical with IC50 values of 45.2 and 45.7 μg/mL, respectively. All the extracts were able to inhibit the growth of Staphylococcus aureus and Listeria monocytogenes investigated strains. The most active are Effix and Fantasia peppers with minimal inhibitory concentration between 12.5 and 25.0 mg/mL, respectively. Overall, these results support the use of these pepper species as dried extract in food preservation. 相似文献
4.
5.
辣椒及其制品中罗丹明B的超高效液相色谱荧光检测 总被引:3,自引:0,他引:3
建立用超高效液相色谱荧光检测器测定辣椒及其制品中罗丹明B残留量的方法。样品中残留的罗丹明B用甲醇/水溶液提取,高速离心后,用超高效液相色谱荧光检测器测定,外标峰面积法定量。罗丹明B在5~500μg/L范围内呈良好的线性关系,3个水平(5.0、20.0、60.0μg/kg)添加罗丹明B的回收率为80.0%~119.8%,相对标准偏差(RSD)为1.08%~2.64%,检出限为5μg/kg。此方法具有简单、快速、准确等优点,适用于辣椒及其制品中残留罗丹明B的检测。 相似文献
6.
The biogeography of pungency in three species of wild chili in the chaco and surrounding highland habitats of southeastern Bolivia is described. We report that Capsicum chacoense, C. baccatum, and C. eximium are polymorphic for production of capsaicin and its analogs, such that completely pungent and completely nonpungent individuals co-occur in some populations. In C. chacoense, the density of plants and the proportion of pungent plants increased with elevation. Above 900 m, all individuals in all populations except two were pungent; nonpungent individuals in at least one of the two polymorphic populations were likely a result of spreading by humans. The occurrence of pungent and nonpungent individuals in three species of ancestral Capsicum and the geographic variation of pungency within species suggest that production of capsaicin and its analogs entails both costs and benefits, which shift from one locality to another. Determining the selection pressures behind such shifts is necessary to understand the evolution of pungency in chilies. 相似文献
7.
T. N. Prabha Bhagyalakshmi Neelwarne Rudrapatnam N. Tharanathan 《Zeitschrift für Lebensmitteluntersuchung und -Forschung A》1998,206(2):121-125
Within 8 days of harvest, fruits of Capsium annum showed striking changes in texture when ripened at room temperature. Physiologically, they showed a significant weight loss
and organoleptically, a change in textural firmness which was evident microscopically, as extensive cellular damage. The associated
biochemical changes during ripening were: (1) an increase in free-sugar levels, (2) an increase in in situ hydrolysis of some
hemicellulose fractions (Hem a, b and c) and (3) a general increase in the activity of cellulase, α-mannosidase, laminarinase,
polygalacturanase, galactanase, mannanase, β-galactosidase and hemicellulase (HCe) activity on Hem b and c. In contrast the
activity of xylanase, pectin methyl esterase and HCe on Hem a decreased during ripening. Cold storage (8°C) held textural
changes in check, resulting in a longer shelf-life for cold-stored fruits compared to fruits stored at room temperature.
Received: 14 May 1997 相似文献
8.
Jeong Hee Lee Young Cheol Kim Doil Choi Jeong Mee Park 《International journal of molecular sciences》2013,14(11):22782-22795
Hot pepper is one of the economically important crops in Asia. A large number of gene sequences, including expressed sequence tag (EST) and genomic sequences are publicly available. However, it is still a daunting task to determine gene function due to difficulties in genetic modification of a pepper plants. Here, we show the application of the virus-induced gene silencing (VIGS) repression for the study of 459 pepper ESTs selected as non-host pathogen-induced cell death responsive genes from pepper microarray experiments in Nicotiana benthamiana. Developmental abnormalities in N. benthamiana plants are observed in the 32 (7%) pepper ESTs-silenced plants. Aberrant morphological phenotypes largely comprised of three groups: stunted, abnormal leaf, and dead. In addition, by employing the combination of VIGS and Agrobacterium-mediated transient assays, we identified novel pepper ESTs that involved in Bax or INF1-mediated cell death responses. Silencing of seven pepper ESTs homologs suppressed Bax or INF1-induced cell death, five of which suppressed both cell death responses in N. benthamiana. The genes represented by these five ESTs encode putative proteins with functions in endoplasmic reticulum (ER) stress and lipid signaling. The genes represented by the other two pepper ESTs showing only Bax-mediated cell death inhibition encode a CCCH-type zinc finger protein containing an ankyrin-repeat domain and a probable calcium-binding protein, CML30-like. Taken together, we effectively isolated novel pepper clones that are involved in hypersensitive response (HR)-like cell death using VIGS, and identified silenced clones that have different responses to Bax and INF1 exposure, indicating separate signaling pathways for Bax- and INF1-mediated cell death. 相似文献
9.
M.P. Fernández-Ronco 《The Journal of Supercritical Fluids》2010,54(1):22-587
Supercritical fluid extraction (SFE) of liquid oleoresins (Capsicum annuum L. and Capsicum frutescens L.) was carried out in order to improve properties of oleoresins obtained by traditional processes using organic solvents. SFE allowed us to fractionate the different compounds present in oleoresins recovering both, an extract and a raffinate which can fulfill trader's needs. The aim of this work was to study the effect of pressure (140-300 bar) and temperature (313-333 K) affecting the yield and the commercial value of oleoresins extracts and raffinates, expressed in terms of parameters such as colour (SCU), pungency (SHU) and carotenoids and capsaicinoids concentration. A set of previous experiments was carried out to select the most suitable type of oleoresin and the initial ratio CO2/oleoresin which assures initial conditions in the biphasic area of CO2/oleoresin diagram to produce fractionation. A response surface methodology (RSM) was used to evaluate the effect of the factors over the variables and different linear correlations were proposed and validated to describe the responses studied. 300 bar and 333 K were selected as the best operational conditions to obtain fractionation. Finally, solubility parameters were obtained and correlated with semi-empirical models in order to obtain correlations which will be useful in subsequent stages of scaling-up. 相似文献
10.
The aim of the present work was to evaluate the chemical composition and the radical-scavenging and antioxidant activities of hot pepper fruits (Capsicum annuum L. var. acuminatum) at three maturity stages (small green, green and red). GC–MS analysis of n-hexane and chloroform fractions showed a different composition between the three stages of ripening. The first stage of maturation (small green) showed the highest radical-scavenging activity (IC50 of 129 μg/ml). Using the bovine brain peroxidation assay, the methanolic extract of green pepper showed significant antioxidant activity (IC50 of 522 μg/ml). Addition of methanolic extract of red and green pepper inhibited oxidation of linoleic acid. Methanolic extract of red pepper showed greater antioxidative potency than the others (IC50 of 3 μg/ml). The different composition of lipophilic compounds and the various amount of phenolics, showed in the three stage of ripening of C. annuum var. acuminatum fruits, modifies the antioxidant activity. 相似文献