超临界CO2萃取樟树籽油脂的实验研究

对超临界CO2萃取樟树籽油的工艺进行了研究，探讨了萃取压力，萃取温度和CO2流量对樟树籽油萃取的影响，在萃取压力20MPa、萃取温度40℃、CO2流量35kg/h条件下，萃取2h，樟树籽油的萃取率可达94．3％。     

超临界CO2萃取樟树籽仁油的研究

利用超临界CO2对樟树籽仁油进行了萃取试验,主要考察了原料粒径、萃取时间、萃取压力和萃取温度的影响,并对萃取出的油的组成及物性参数进行了分析.试验结果表明,在原料粒径80～100目、萃取时间3.0h、萃取压力20MPa、萃取温度55℃和CO2流量为4L/h的条件下,樟树籽仁油的萃取率达57.2%,并且油的色泽淡,酸值低,质量好.气相色谱分析表明,樟树籽仁油的脂肪酸组成主要是癸酸和月桂酸.     

黑加仑籽油的超临界CO2萃取工艺研究

采用正交试验确定超临界CO2萃取黑加仑籽油的最佳工艺条件.结果表明:超临界CO2萃取黑加仑籽油的最佳工艺条件为萃取压力25MPa,萃取温度为40℃,分离釜Ⅰ压力为6MPa,萃取时间为120min.在上述务件下黑加仑籽油的萃取效率为60.26%,采用超临界CO2萃取黑加仑籽油是可行的.     

超临界CO2萃取薜荔籽油工艺研究

采用超临界C02萃取技术,对薜荔籽中薜荔籽油的萃取工艺进行探讨.研究粉碎度、萃取压力、萃取温度、C02流量和萃取时间对薜荔籽油出油率的影响.实验表明,超临界CO2萃取薜荔籽油的最佳工艺参数是粉碎度40目、萃取压力25MPa、萃取温度40℃、C02流量25L/h、萃取时间90min,薜荔籽油的出油率最高,达到20.93%.     

超临界二氧化碳萃取石榴籽油的研究

利用超临界CO2对石榴籽中石榴籽油的萃取进行了研究,研究了粉碎度、装料量、萃取压力、萃取温度、CO2流量、分离压力和分离温度对石榴籽油萃取率的影响。试验表明,超临界CO2萃取石榴籽油的工艺参数是粉碎度40目、装料量200g、萃取压力30MPa、萃取温度40℃、CO2流量15L/h、分离压力8MPa、分离温度35℃,萃取率23.55%。     

超临界CO2萃取猕猴桃籽油工艺的研究

在单因素试验基础上,采用Box-Behnken 设计法对影响猕猴桃籽油超临界CO2 萃取的关键因素CO2 流量、萃取压力和萃取温度进行了优化探讨及其萃取数学模型的研究。结果表明：CO2 流量、压力和温度等因素对猕猴桃籽油萃取率的影响较显著,并且压力和温度对猕猴桃籽油萃取率的交互效应影响显著;超临界CO2 萃取的最佳工艺条件为：物料粒度40目、萃取压力31MPa、萃取温度40℃、CO2 流量27kg/h、萃取时间150min,该工艺条件下猕猴桃籽油萃取率达31.86%;建立了以猕猴桃籽油萃取率为目标值,以各提取工艺参数为因素的二次多项式模型,经验证,计算值和试验值拟合良好;超临界CO2 萃取的猕猴桃籽油与用己烷提取的油脂在脂肪酸组成上没有显著差别。     

茶叶籽油的加工工艺研究

利用茶叶籽加工成食用油脂,研究应用超临界CO2萃取茶叶籽油的工艺,探索不同压力、温度、时间、水分等对超临界CO2萃取茶叶籽油的工艺影响。结果表明：萃取压力40MPa,温度60℃,时间1.5h,水分3.0%,即可获得比较好的萃取率。     

超临界CO_2流体萃取石榴籽油工艺条件的研究

以石榴籽为原料,对超临界CO2流体萃取石榴籽油的工艺条件进行了研究。通过单因素试验,研究了萃取压力、萃取温度和萃取时间对石榴籽油得率的影响。在单因素试验的基础上,通过正交试验确定了超临界CO2流体萃取石榴籽油的最佳工艺条件。结果表明,超临界CO2流体萃取石榴籽油最佳工艺条件为:萃取压力40 MPa,萃取温度55℃,萃取时间80 min,分离釜Ⅰ温度60℃,压力10 MPa,分离釜Ⅱ温度35℃,压力6 MPa。在最佳工艺条件下,石榴籽油得率为18.6%。     

乌桕籽皮油超临界CO2流体萃取及其成分分析

应用超临界CO2 流体萃取技术,研究了乌桕籽皮油的萃取工艺。采用正交试验,考察了萃取压力、温度、CO2 流量三因素对乌桕籽皮油萃取率的影响效果。最佳萃取条件确定为：压力40MPa,温度36℃,CO2 流量20L/h,时间1h。利用GC 分析了乌桕籽皮油的成分组成,以期为乌桕籽的综合利用提供理论依据。     

微波预处理-超临界CO_2萃取牡丹籽油的工艺研究

为实现超临界CO2萃取技术高效萃取牡丹籽油,先利用微波技术对原料进行预处理,再利用超临界CO2萃取技术萃取牡丹籽油。固定微波功率800 W,采用正交实验得到微波预处理最佳条件为:微波预处理时间40 s,原料粉碎粒度100目,原料水分含量6.2%。采用响应面法对超临界CO2萃取工艺条件进行优化分析,得到最佳工艺条件为:CO2流量25 kg/h,萃取压力33 MPa,萃取温度40℃,萃取时间100 min。在最佳条件下,牡丹籽油萃取率高达98.55%。与未经微波预处理直接进行超临界CO2萃取所得牡丹籽油相比,水分及挥发物含量降低,酸值和过氧化值升高。     

Review of techniques to manufacture micro-hydrogel particles for the food industry and their applications

Microgels are ‘soft’ microscopic cross-linked polymeric particles that are being increasingly exploited in a variety of industries for rheology control, encapsulation and targeted delivery. They are valued because of the ability to tune their functionality to address specific applications in oil recovery, coatings, drug delivery, cosmetics, personal care and foods. Food microgels are typically biopolymer hydrogels in the form of microspheres, nanospheres (also called nanogels), spheroids and fibres. The utilisation of engineered microgels in foods has so far been limited, despite their great potential to address several needs in the food industry, including: satiety control, encapsulation of phytonutrients and prebiotics, texture control for healthier food formulations (e.g. reduced fat products), and targeting delivery to specific areas in the digestive tract. We review the scientific and patent literature on the utilisation and manufacturing methods for producing microgels with an emphasis on micro-hydrogels for food applications.     

12—A CRITIQUE OF SOME HYPOTHESES RELATING TO THE HETEROGENEITY OF THE HIGH-SULPHUR PROTEINS OF WOOL

Joubert and Burns prepared a large number of fractions from the high-sulphur proteins of wool and estimated their molecular weights and amino-acid compositions. Their data have been re-examined in order to look for statistically significant interrelations between amino acids and between the proportion of various amino acids and molecular weight. Statistical analysis of the data is also used to examine the credibility of some hypotheses concerning the mechanism of keratin biosynthesis and to provide further evidence for the existence of families of proteins within the high-sulphur fractions of wool.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of     

The Latest Data about Development of Chinese Printing Industry in 2013

In the 2014 China（Shanghai）International Printing Week,Director Wang Yanbin released the latest data about development of Chinese printing industry in 2013.According to statistics,in 2013,the total output value of Chinese printing industry exceeded 1trillion Yuan for the first time,reaching 1.03985 trillion Yuan.There were 105,000 printing enterprises in China,employees were 3.415 million.The total asset was 1.06247 trillion Yuan;     

The State Council Issued "Directory of Government Approved Investment Projects(2013 Edition)"

正On December 2nd,2013,the State Council issued the notification of"Directory of Government Approved Investment Projects(2013 Edition)"(hereafter referred to as"notification").It is pointed out in the"notification"that in order to further deepen reforms in investment systems and administrative examination and approval systems,simplify administrative procedures and delegate powers to lower levels,earnestly     

China textile machinery: taking off in progress

正Among the 1600 exhibitors who take apart in the ITMA ASIA+CITME2014 2/3 are Chinese manufactures.If the numerous figures failed to attract your attention,the increase of quality should draw your focus.To adopt the demand of developing textile machine market,domestic textile machinery enterprises now follow the slogan of"technology drives development"to enhance product competitiveness.Our domestic sellers will showcase product ranging from spinning,weaving,dyeing and printing,     

Top Ten News of China's Paper Industry 2013

On December 24th, 2013, the meeting on the selection of top 10 news of China＇s paper industry 2013 sponsored by 〈China Paper Newsletters〉 was held in Beijing. The yearly selection of the top l0 news, which began in 2000, has become a brand activity widely recognized in the industry thanks to the support from the authorities at all levels and public participation.     

National Development and Reform Commission Issued Announcement for Selection of Major Preliminary Research Projects for the "13~(th) Five-Year Plan"

In Apri Commi major p Plan＂ （h 2014, the National Development and Reform ssion issued an announcement for selection of reliminary research projects for the ＂13th Five-Year ereafter referred to as ＂The Announcement＂）     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the latest scientific     

Contamination of animal feed and food from animal origin with mineral oil hydrocarbons

Oils and fats used for the production of animal feed can become contaminated with mineral oil material originating from gas oils (C₁₈-C₃₅) or synthetic oils (poly alpha olefins, C₂₅ to beyond C₄₅). An important cause is assumed to be the discharge of waste oils, such as motor oil and hydraulic oils. Mineral oil material was analysed by on-line LC-GC-FID directly in the fat or in a raw extract from animal feed or foodstuffs. In Switzerland in summer/autumn 1999 concentrations in oils and fats for feed production were often found to be between 100 and 1000mg/kg. In the feeds, the average concentration was around 100mg/kg with values ranging up to a maximum of 1000mg/kg; few samples were free of contamination. In animal body fat, the average concentration determined in summer 1999 was 25mg/kg, with a maximum of 150mg/kg, although in samples from December 1999, contamination was substantially lower. In the fat phase of eggs, the average concentration was 30mg/kg, with a maximum of 80mg/kg. Paraffin oil is used for feed production, which may account for part of the contamination problem (e.g. eggs).