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Liquid penetration of freeze-drying and air-drying wood of plantation Chinese fir 被引量:8
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作者 LU Jian-xiong LIN Zhi-yuan JIANG Jia-li JIANG Jing-hui 《Journal of Forestry Research》 SCIE CAS CSCD 2005年第4期293-295,共3页
A comparative study was conducted on liquid penetration of the freeze-drying and air-drying sapwood and heartwood lumber of plantation Chinese fir (Cunninghamia lanceolata). The maximum amount of dyeing solution upt... A comparative study was conducted on liquid penetration of the freeze-drying and air-drying sapwood and heartwood lumber of plantation Chinese fir (Cunninghamia lanceolata). The maximum amount of dyeing solution uptake by the capillary rise method was used to evaluate the liquid penetration properties of the treated wood. The pit aspiration ratio was determined by semithin section method. Changes in wood microstructure were investigated using scanning electron microscopy. The results showed that compared with air drying, the freeze drying had a significant effect on liquid penetration of sapwood and heartwood of Chinese fir. The liquid penetration of sapwood is significantly higher than that of the heartwood for both drying treatments. Low pit aspiration ratio and cracks of pits membrane of some bordered pits are the main reasons for increasing liquid penetration after freeze drying treatment. 展开更多
关键词 Chinese fir Sapwood lumber Heartwood lumber freeze drying Air drying Liquid penetration Pit aspiration ratio
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Preparation of highly dispersed iron species over ZSM-5 with enhanced metal-support interaction through freeze-drying impregnation 被引量:6
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作者 Lisong Fan Dangguo Cheng +1 位作者 Fengqiu Chen Xiaoli Zhan 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第7期1109-1115,共7页
Supported metal catalysts play a vital role in the chemical industry, and the metal-support interaction is an important property of the catalyst. However, in the traditional impregnation method, it is difficult to obt... Supported metal catalysts play a vital role in the chemical industry, and the metal-support interaction is an important property of the catalyst. However, in the traditional impregnation method, it is difficult to obtain sufficient metal-support interactions owing to the mobility of the metal precursor during evaporation drying. Here, freeze drying is applied during impregnation instead of evaporation drying for enhancing the metal-support interactions. 57 Fe ZSM-5 was chosen as a representative catalyst. A quantitative analysis was conducted based on Mossbauer spectroscopy. Compared with traditional evaporation-drying catalyst, freeze-drying catalyst has stronger metal-support interactions. In addition, more iron species are confined in the channel and smaller metal sizes and less diversity are obtained. The compositional change is also proved because of the superior performance of the freeze-drying catalyst during N2O decomposition. This method can be extended to other supported metal catalysts prepared through an impregnation method, which can be used to tune the metal-support interactions and metal sizes. 展开更多
关键词 IRON ZSM-5 zeolite freeze drying IMPREGNATION Metal-support interaction Metal size
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Structural and functional properties of hydrolyzed/glycosylated ovalbumin under spray drying and microwave freeze drying 被引量:8
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作者 Lili Liu Xiaoning Dai +2 位作者 Huaibin Kang Yunfeng Xu Weiming Hao 《Food Science and Human Wellness》 SCIE 2020年第1期80-87,共8页
Ovalbumin(OVA),the main protein in egg white,affects most of the functional properties of egg white protein in food processing.The aim of this study was to investigate the effects of spray drying(SD)and microwave free... Ovalbumin(OVA),the main protein in egg white,affects most of the functional properties of egg white protein in food processing.The aim of this study was to investigate the effects of spray drying(SD)and microwave freeze drying(MFD)on the preparation of hydrolyzed/glycosylated ovalbumin(HGOVA)and provide useful information on the applications of egg protein powders in the food industry.Results demonstrated that the structure of HGOVA was considerably changed,and its functional properties were improved compared with those of native OVA.SD and MFD processing did not lead to dissociation of HGOVA subunits.SD-HGOVA exhibited higher protein solubility,emulsifying activity,foaming capacities,and gel hardness than MFD-HGOVA.However,MFD-HGOVA was better than the SD-HGOVA in terms of color,emulsion stability,foam stability,water/oil absorption capacity,and thermal stability.Selection of an appropriate drying method could enhance the potential applications of HGOVA in the food industry. 展开更多
关键词 OVALBUMIN GLYCOSYLATION Spray drying Microwave freeze drying
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Spray freeze drying of small nucleic acids as inhaled powder for pulmonary delivery 被引量:2
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作者 Wanling Liang Alan Y.L.Chan +4 位作者 Michael Y.T.Chow Fiona F.K.Lo Yingshan Qiu Philip C.L.Kwok Jenny K.W.Lam 《Asian Journal of Pharmaceutical Sciences》 SCIE CAS 2018年第2期163-172,共10页
The therapeutic potential of small nucleic acids such as small interfering RNA(siRNA) to treat lung diseases has been successfully demonstrated in many in vivo studies. A major barrier to their clinical application is... The therapeutic potential of small nucleic acids such as small interfering RNA(siRNA) to treat lung diseases has been successfully demonstrated in many in vivo studies. A major barrier to their clinical application is the lack of a safe and efficient inhaled formulation.In this study, spray freeze drying was employed to prepare dry powder of small nucleic acids.Mannitol and herring sperm DNA were used as bulking agent and model of small nucleic acid therapeutics, respectively. Formulations containing different solute concentration and DNA concentration were produced. The scanning electron microscope(SEM) images showed that the porosity of the particles increased as the solute concentration decreased. Powders prepared with solute concentration of 5% w/v were found to maintain a balance between porosity and robustness. Increasing concentration of DNA improved the aerosol performance of the formulation. The dry powder formulation containing 2% w/w DNA had a median diameter of 12.5 μm, and the aerosol performance study using next generation impactor(NGI) showed an emitted fraction(EF) and fine particle fraction(FPF) of 91% and 28% respectively. This formulation(5% w/v solute concentration and 2% w/w nucleic acid) was adopted subsequently to produce siRNA powder. The gel retardation and liquid chromatography assays showed that the siRNA remained intact after spray freeze drying even in the absence of delivery vector. The siRNA powder formulation exhibited a high EF of 92.4%and a modest FPF of around 20%. Further exploration of this technology to optimise inhaled siRNA powder formulation is warranted. 展开更多
关键词 INHALATION PULMONARY delivery SMALL interfering RNA SPRAY freeze drying
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Preservation of moderately thermophilic culture by freeze drying and frozen preservation way and effect on subsequent bioleaching of chalcopyrite 被引量:2
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作者 曾伟民 周洪波 +1 位作者 刘学端 邱冠周 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第5期882-887,共6页
Freeze drying and frozen preservation way was used to preserve a moderately thermophilic culture for bioleaching of chalcopyrite concentrate.After preservation of 15 months,the cell viability rate decreases to 22% wit... Freeze drying and frozen preservation way was used to preserve a moderately thermophilic culture for bioleaching of chalcopyrite concentrate.After preservation of 15 months,the cell viability rate decreases to 22% with a cell density of 7×107 mL-1.When the growth time was extended from 8 days to 14 days,cell density would increase in a large scale to about 3×108 mL-1.In the bioleaching experiments,unpreserved and preserved cultures were compared for dissolving chalcopyrite concentrate.Before 44 days,the unpreserved culture can reach a high copper extraction of about 17.4 g/L.While the preserved culture shows a rather low copper extraction,which is only 9.7 g/L.When the bioleaching time was extended to 80 days,copper extraction by preserved culture increases remarkably,and the concentration of copper finally achieves up to 18.3 g/L.On the other hand,copper extraction by the unpreserved culture does not show remarkable increase from 44th to the 80th day,and finally the total copper extraction is 19.8 g/L.As a result,total copper extraction in 80 days by preserved culture approaches that by unpreserved culture and freeze drying and frozen preservation even after 15 months does not bring much decrease of bioleaching ability. 展开更多
关键词 freeze drying and frozen preservation moderately thermophilic culture BIOLEACHING CHALCOPYRITE
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Dynamic culture improves MSC adhesion on freeze-dried bone as a scaffold for bone engineering 被引量:2
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作者 Fabiany da Costa Gonalves Ana Helena da Rosa Paz +2 位作者 Priscila Schmidt Lora Eduardo Pandolfi Passos Elizabeth Obino Cirne-Lima 《World Journal of Stem Cells》 SCIE CAS 2012年第2期9-16,共8页
AIM: To investigate the interaction between mesenchymal stem cells (MSCs) and bone grafts using two different cultivation methods: static and dynamic. METHODS: MSCs were isolated from rat bone marrow. MSC culture was ... AIM: To investigate the interaction between mesenchymal stem cells (MSCs) and bone grafts using two different cultivation methods: static and dynamic. METHODS: MSCs were isolated from rat bone marrow. MSC culture was analyzed according to the morphology, cell differentiation potential, and surface molecular markers. Before cell culture, freeze-dried bone (FDB) was maintained in culture for 3 d in order to verify culture medium pH. MSCs were co-cultured with FDB using two different cultivation methods: static co-culture (two-dimensional) and dynamic co-culture (three-dimensional). After 24 h of cultivation by dynamic or static methods, histological analysis of Cell adhesion on FDB was performed. Cell viability was assessed by the Trypan Blue exclusion method on days 0, 3 and 6 after dynamic or static culture. Adherent cells were detached from FDB surface, stained with Trypan Blue, and quantified to determine whether the cells remained on the graft surface in prolonged non-dynamic culture. Statistical analyses were performed with SPSS and a P < 0.05 was considered significant. RESULTS: The results showed a clear potential for adipogenic and osteogenic differentiation of MSC cultures. Rat MSCs were positive for CD44, CD90 and CD29 and negative for CD34, CD45 and CD11bc. FDBs were maintained in culture for 3 d and the results showed there was no significant variation in the culture medium pH with FDB compared to pure medium pH (P > 0.05). In histological analysis, there was a significant difference in the amount of adhered cells on FDB between the two cultivation methods (P < 0.05). The MSCs in the dynamic co-culture method demonstrated greater adhesion on the bone surface than in static co-culture method. On day 0, the cell viability in the dynamic system was significantly higher than in the static system (P < 0.05). There was a statistical difference in cell viability between days 0, 3 and 6 after dynamic culture (P < 0.05). In static culture, cell viability on day 6 was significantly lower than on day 3 and 0 (P < 0.05). CONCLUSION: An alternative cultivation method was developed to improve the MSCs adhesion on FDB, demonstrating that dynamic co-culture provides a superior environment over static conditions. 展开更多
关键词 Mesenchymal stem cell Cell culture Cell adhesion Bone matrix freeze drying
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Ag/TiO_2/freeze-dried graphene nanocomposite as a high performance photocatalyst under visible light irradiation 被引量:4
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作者 Ziaeddin Jafari Nader Mokhtarian +3 位作者 Ghader Hosseinzadeh Mousa Farhadian Asghar Faghihi Farideh Shojaie 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2016年第3期393-402,共10页
Ag/TiO2/freeze-dried graphene nanocomposites have been prepared via a facile one-step solvothermal method for the photocatalytic degradation of Rh B under visible light irradiation. During the solvothermal process, re... Ag/TiO2/freeze-dried graphene nanocomposites have been prepared via a facile one-step solvothermal method for the photocatalytic degradation of Rh B under visible light irradiation. During the solvothermal process, reduction of graphene oxide and loading of Ag/TiO2nanoparticles on graphene sheets were achieved. Investigation of chemical state of products showed that covering of Ag/TiO2surface with higher weight ratio of graphene resulting in that Ag metals in Ag/TiO2were oxidized to Ag2 O in nanocomposite structure after solvothermal process. Degree of photocatalytic activity enhancement strongly depends on the coverage of Ag/TiO2surface by porous graphene. The sample of 1 wt% porous graphene hybridized Ag/TiO2showed the highest photocatalytic activity, which is related to high migration efficiency of photoinduced of electrons and reduction of electron–hole recombination rate due to high electrical conductivity of graphene. Expanding of absorption to visible light region was ascribed to surface plasmon resonance effect of Ag metals and presence of graphene. Investigation of photocatalytic performance of formic acid as a dye-less organic pollutant showed that dye sensitization effect of Rh B molecules during evaluation of photocatalytic performance was negligible. 展开更多
关键词 freeze-dried graphene TiO_2 Ag PHOTOCATALYST NANOCOMPOSITE
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Research on Freeze Drying and High-temperature Molding in Medium-temperature Fluorocarbon Board 被引量:1
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作者 ZHANG Dong ZHANG Pan +2 位作者 YAN Xuefang CHAN Mingyang YANG Lin 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2021年第6期777-785,共9页
A research and test system for the carbon anode plate preparation technology was established to optimize the physical and chemical indicators of carbon anode plates,such as bulk density,resistivity,and compressive str... A research and test system for the carbon anode plate preparation technology was established to optimize the physical and chemical indicators of carbon anode plates,such as bulk density,resistivity,and compressive strength,and improve the operating cycle.In this study,a carbon plate was prepared via a combination of high-temperature molding and freeze drying using a formulation with asphalt content much lower than the industry standard.The experimental results show that the density of the carbon plate is increased by 0.02-0.04 g/cm^(3) by improving the drying method.The carbon plate prepared in the laboratory has a bulk density of 1.814 g/cm^(3),resistivity of 29.8μΩ·m,and compressive strength of 89.27 MPa.The bulk density,room-temperature resistivity,compressive strength,graphitization,and other key indices of the carbon plates made in the laboratory and those procured from a factory in Shanxi,Datong,were tested.Additionally,the specimens were analyzed using thermogravimetry-differential scanning calorimetry,scanning electron microscopy,and X-ray fluorescence.The laboratory-made carbon plates were superior to the factory specimens in terms of all the indicators tested.The process in this study improves the performance of the carbon anode plate and is used to provide technical support for electrolytic fluorine production in enterprises.The carbon plates prepared in the laboratory fully meet the process requirements of a medium-temperature electrolytic fluorine production line,which indicates the possibility of its use in the stable production of fluorine gas. 展开更多
关键词 fluorocarbon anode high density freeze drying high-temperature molding
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Study of self-made freeze-dried bilayered fibrin-binding amniotic membrane in ocular trabeculectomy in rabbits 被引量:3
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作者 Wan Li, Ming-Chang Zhang 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2011年第6期582-589,共8页
AIM: To investigate the antifibrotic effect of freeze-dried bilayered fibrin-binding amniotic membrane on trabeculectomy in a rabbit model. METHODS: Twenty-four Japanese white rabbits were randomized into three groups... AIM: To investigate the antifibrotic effect of freeze-dried bilayered fibrin-binding amniotic membrane on trabeculectomy in a rabbit model. METHODS: Twenty-four Japanese white rabbits were randomized into three groups: the experimental group (ocular trabeculectomy in combination with freeze-dried bilayered fibrin-binding amniotic membrane transplantation), the control group (ocular trabeculectomy in combination with natural bilayered fibrin-binding amniotic membrane) and the blank group (single trabeculectomy). Clinical observation, hematoxylin-eosin staining, Massion staining, real-time PCR and immunohistochemistry for alpha -SMA were performed on days 7, 14, 21 and 30 following surgery. RESULTS: Statistical differences were noted in survival. analysis and intraocular pressure(IOP) among groups on days 7, 14, 21 and 30 following surgery. Histology, immunohistochemistry and real-time PCR further demonstrated that trabeculectomy in combination with freeze-dried bilayered fibrin-binding amniotic membrane resulted in good wound healing and no scar formation. CONCLUSION: Self-made freeze-dried bilayered fibrin-binding amniotic membrane may inhibit the formation of scarring in glaucoma after trabeculectomy. 展开更多
关键词 freeze-DRIED fibrin-binding amniotic membrane TRABECULECTOMY
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Efficacy of Yiqi Fumai (Freeze-Dried Powder) on Ischemic Diastolic Heart Failure 被引量:1
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作者 Dalin Song Mengfen Hu +3 位作者 Tongliang Han Hua Zhang Yongjun Mao Tao Tian 《Chinese Medicine》 2014年第2期75-86,共12页
Objective: To evaluate the efficacy of Yiqi Fumai freeze-dry powder (YFP) on ischemic diastolic heart failure. Methods: 100 patients diagnosed with unstable angina accompanying ischemic diastolic heart failure (IDHF) ... Objective: To evaluate the efficacy of Yiqi Fumai freeze-dry powder (YFP) on ischemic diastolic heart failure. Methods: 100 patients diagnosed with unstable angina accompanying ischemic diastolic heart failure (IDHF) were selected randomly. 52 patients with TCM syndrome of qi-yin deficiency were divided into Chinese and Western combination therapy group. 48 patients have no TCM syndrome of qi-yin deficiency, and were treated with standard western medicine. After treatment, Seattle Angina Questionnaire Evaluation, ECG, conventional and stress echocardiography (SE) index, NT-proBNP were compared between before and after treatment. Results: The differences of PL, TS, DP between before and after treatment by YFP were statistically significant 展开更多
关键词 Yiqi Fumai (freeze-Dried Powder) DIASTOLIC Heart Failure Seattle ANGINA QUESTIONNAIRE (SAQ) Evaluation Stress ECHOCARDIOGRAPHY
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Optimization of Freeze-drying Protective Agents for Lactobacillus plantarum KLDS1.0391 by Response Surface Methodology
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作者 Jia Fang-fang Han Bing +2 位作者 Meng Xiang-chen Zhang Lu-ji Zhou Jin-yu 《Journal of Northeast Agricultural University(English Edition)》 CAS 2017年第2期74-80,共7页
In this study, the Single Factor Test(SFT) was used to optimize the pre-freezing conditions of L. plantarum KLDS1.0391(KLDS1.0391). Further, the Freeze-Drying Protective Agents(FDPA) of KLDS1.0391 was optimized ... In this study, the Single Factor Test(SFT) was used to optimize the pre-freezing conditions of L. plantarum KLDS1.0391(KLDS1.0391). Further, the Freeze-Drying Protective Agents(FDPA) of KLDS1.0391 was optimized by Response Surface Methodology(RSM). The optimum pretreatment conditions were as the follows: initial concentration of KLDS1.0391 was 1011 CFU · m L-1 and KLDS1.0391 was pre-freezed at –80℃ for 8 h to achieve the survival rate of 46.21%. The main components of FDPA were skim milk, sucrose, sodium glutamate and Tween-80. And the influence of four factors on the survival rate of KLDS1.0391 in freeze-drying was in order as the follows: skim milk〉sucrose〉Tween-80〉sodium glutamate. The optimal FDPA composition was skim milk 11.3%, sucrose 9.8%, sodium glutamate 5.1% and Tween-80 0.2%. Under the above conditions, the survival rate of the cells was 82.98%. Comparing the predicted values, the relative error was 0.37% and the difference was not significant, which indicated that the established model could effectively reflect the actual protection of FDPA to KLDS1.0391. 展开更多
关键词 Lactobacillus plantarum response surface method freeze drying protective agent
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Antioxidants, Chemical Composition and Minerals in Freeze-Dried Camu-Camu (<i>Myrciaria dubia</i>(H.B.K.) Mc Vaugh) Pulp
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作者 Jaime Paiva Lopes Aguiar Francisca das Chagas do Amaral Souza 《Food and Nutrition Sciences》 2015年第10期869-874,共6页
Camu-camu (Myrciaria dubia (H.B.K.) Mc Vaugh) is a fruit native to the Amazon region and is considered the greatest natural source of vitamin C worldwide. It is also a promising source of many phenolic compounds, incl... Camu-camu (Myrciaria dubia (H.B.K.) Mc Vaugh) is a fruit native to the Amazon region and is considered the greatest natural source of vitamin C worldwide. It is also a promising source of many phenolic compounds, including flavonoids and anthocyanins. Given the growing rates of chronic non-communicable diseases such as dyslipidemia, obesity and diabetesworldwide, freeze-dried camu-camu can be used for its functional properties, which can reduce the incidence of these diseases. Hence, the objective of this study was to produce freeze-dried camu-camu pulp and present it as an alternative functional food because of its high production and use potential, adding value to this fruit in particular, not very demanded by the food industry. Freeze-dried camu-camu pulp is a pink, homogeneous powder with great antioxidant capacity, 52,000 μmol TE/g, six times greater than freeze-dried acai powder. It is also very rich in vitamin C (20.31 g/100g), potassium (796.99 mg/100g), carbohydrates (47.00 g/100g), dietary fiber (19.23 g/100 g), many amino acids, other vitamins, and anthocyanins (0.739 mg/g). The camu-camu freeze-drying process is an effective alternative way to preserve the fruit, preserving its macronutrient and vitamin C contents. Camu-camu is also an excellent source of other bioactive compounds, such as minerals and other phenolic compounds. In conclusion, camu-camu can be used to introduce bioactive compounds into food products and to delay or prevent many human diseases. 展开更多
关键词 Functional FOODS Ascorbic Acid freeze drying Antioxidant Capacity
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Fatty Acid Composition in Freeze-Dried Chinese Mitten Crabs (<i>Eriocheir sinensis</i>)
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作者 Lihong He Feng Li Junyong Tang 《Open Journal of Marine Science》 2012年第3期90-95,共6页
Freeze drying is reported to be the best method of dehydration. Live fresh Chinese mitten crabs (Eriocheir sinensis) were freeze dried. The moisture content, rehydration ratio, and fatty acid composition of freeze-dri... Freeze drying is reported to be the best method of dehydration. Live fresh Chinese mitten crabs (Eriocheir sinensis) were freeze dried. The moisture content, rehydration ratio, and fatty acid composition of freeze-dried crabs were analysed. The applicability of using freeze drying to process high-value E. sinensis, so as to prolong the time duration of their storage and marketing, were discussed. After lyophilisation, the average moisture content was 6%. The physical properties (shape, size, and colour) of the musculature and viscera were maintained well during freeze drying. The rehydration ratio was 2.15 when rehydrated for 30 min at room temperature. The levels of polyunsaturated fatty acids, especially eicosapentaenoic acid and docosahexaenoic acid, were higher in female freeze-dried crabs than in male crabs. After full rehydration, the fatty acid composition of freeze-dried crabs showed no significant differences to that of frozen crabs after thawing. In conclusion, freeze drying can well preserve the physical properties of the edible parts and fatty acid composition of the viscera in high-value E. sinensis. Rehydration has no destruction of the nutritional value regarding to the fatty acid composition. Therefore, freeze drying is a suitable technique for the processing of high-value E. sinensis. 展开更多
关键词 ERIOCHEIR sinensis Fatty Acid Composition freeze drying Frozen Storage REHYDRATION Ratio VISCERA
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Analysis on ultrastructure of freeze drying red blood cells
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《中国输血杂志》 CAS CSCD 2001年第S1期349-,共1页
关键词 Analysis on ultrastructure of freeze drying red blood cells
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Physicochemical Properties and Sensory Evaluation of Sponge Cake Supplemented with Hot Air and Freeze Dried Oyster Mushroom (<i>Pleurotus sajor-caju</i>)
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作者 Rana Das Manobendro Sarker +3 位作者 Mahmuda Begum Lata Md. Atiqual Islam Md. Azmain Al Faik Shagor Sarkar 《World Journal of Engineering and Technology》 2020年第4期665-674,共10页
The study was aimed to enhance the nutritional quality of sponge cakes with oyster mushroom (<i><span style="font-family:Verdana;">Pleurotus</span></i><span style="font-family... The study was aimed to enhance the nutritional quality of sponge cakes with oyster mushroom (<i><span style="font-family:Verdana;">Pleurotus</span></i><span style="font-family:Verdana;"> </span><i><span style="font-family:Verdana;">sajor-caju</span></i><span style="font-family:Verdana;">). In this study, the physicochemical, functional, and sensory properties of cake supplemented with five different levels of mushroom powder (0 as control, 5%, 7%, 10%, and 12%) were evaluated. The results revealed that both hot air dried (HD) and freeze dried (FD) mushroom powder contained a higher amount of protein, fat, ash and fiber ontent compared with wheat flour used in cake, but the carbohydrate and moisture content showed the reverse trend. The study also found that increasing the level of fortification from 0% to 12% mushroom powder also increased the protein, fat, ash, and fiber content in the cake. FD mushroom powder significantly (p ≤ 0.05) recorded the highest protein (11.72% - 15.16%), fat (20.01% - 21.9%), ash (1.75% - 1.92%), and fiber (1.39% - 1.74%) with increasing the level of supplementation from 5%</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">-</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">12%. In contrast, carbohydrate content of cake decreased from 34.13% - 31.15% with increasing the level of FD mushroom from 5% - 12%. Also</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> the volume and weight of the cake with FD mushroom were higher compared to HD and control sample. The results of sensory evaluation indicated that sponge cake with 10% FD oyster mushroom was rated the most acceptable after the control.</span> 展开更多
关键词 CAKE MUSHROOM freeze-Dried Mushroom Mushroom Powder Protein Fiber
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The Study on Technique of Making Freeze-dried Specimen of Mongolia Horse
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作者 D. MANGLAI 《现代农业科学》 2008年第11期25-27,共3页
冻干标本是在冷态条件下制作的,其方法为:迅速且完全地冷冻所选材料,待其干燥后进行加工。此方法比较简单且能真实的反应组织的位置、形状及它们的关系。以蒙古马为实验材料介绍了冻干标本工艺,以及如何保存维护冻干标本的方法。
关键词 应用 冻干标本 保存维护 制作方法
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Effect of Instant Controlled Pressure Drop Process Coupled to Drying and Freezing on Antioxidant Activity of Green “Poblano” Pepper (<i>Capsicum annuum</i>L.)
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作者 Carmen Téllez-Pérez Anaberta Cardador-Martínez +3 位作者 Sabah Mounir José Gerardo Montejano-Gaitán Vaclav Sobolik Karim Allaf 《Food and Nutrition Sciences》 2013年第3期321-334,共14页
Different food operations have been intensified through assisting them by instant controlled pressure drop DIC treatment. Such processes should be defined in order to preserve the main nutritional and sensorial conten... Different food operations have been intensified through assisting them by instant controlled pressure drop DIC treatment. Such processes should be defined in order to preserve the main nutritional and sensorial contents of the raw material. The present paper is dedicated to study the evolution of the main bioactive compounds (total phenolics and flavonoids) and functional properties such as the antioxidant activity of processed samples in the case of Green “Poblano” Pepper (Capsicum annuum L.). Results issued from DIC-assisted hot air drying, and DIC-assisted freezing, allowed to identifying the impact of DIC studied operating parameters, which were the saturated steam pressure and the processing time, and the best DIC treatment correlated with the considered operation. 展开更多
关键词 Instant Controlled Pressure Drop CAPSICUM Phenols Flavonoids Antioxidant Activity drying freezING
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Human Sperm Freezing: Mini Update
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作者 Shah Dupesh P. Rasappan +1 位作者 S. Shila Karthik Gunasekaran 《Advances in Reproductive Sciences》 2018年第3期59-69,共11页
Sperm freezing is widely used in ART clinics around the globe. Very little has actually changed with respect to cryopreservation protocols and methodology of freezing over the last 50 years. The aim of this paper is t... Sperm freezing is widely used in ART clinics around the globe. Very little has actually changed with respect to cryopreservation protocols and methodology of freezing over the last 50 years. The aim of this paper is to briefly review the basic principles that underlie freezing and ice crystal formation and also provide a brief overview of newer sperm freezing techniques like sperm vitrification and freeze drying of sperm. 展开更多
关键词 SPERM freezING Principles of freezING freezING Injury Ice NUCLEATION CRYOPROTECTANTS SPERM VITRIFICATION and freeze drying SPERM
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Analysis of the Influence of Different Drying Methods on the Active Ingredients of Fresh Medicine
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作者 Jianqin Yang Mingsan Miao 《Chinese Medicine and Natural Products》 2022年第1期1-4,共4页
The heating area of the material is large and the thermal efficiency is high,but it is n ecessary to control the suitable drying temperature ofdiffere nt medici nal materials to preserve the effective in gredients.D i... The heating area of the material is large and the thermal efficiency is high,but it is n ecessary to control the suitable drying temperature ofdiffere nt medici nal materials to preserve the effective in gredients.D iff ere nt kinds of Chinese medicine need different drying conditions to fulfill good drying requirements.Natural drying in the shade is one of the traditional drying methods,which takes a long time and is easily affected by the weather.The water volatilizes slowly.It is prone to mildew and discoloration during the drying process.However,it can better preserve the volatile oil components of Chinese medicine.The hot-air drying machine has lower requirements.The medicinal materials have a large heating area and high thermal efficiency,but it is necessary to control the appropriate drying temperature of different medicinal materials in order to preserve the active ingredients of the medicinal materials;it is not suitable for medicinal materials that stick and bind easily.The microwave drying method possesses superiority in drying some valuable medicinal materials such as Ren she n(Radix et Rhizoma Ginseng)and Lurong(Co「nu Cervi Pantotrichum),and the effective ingredients are preserved at a high degree;it can also achieve the purpose of killing enzymes and protecting glycosides and have a good bactericidal effect,but it is not suitable for Chinese medicines containing heat-sensitive ingredients,because it will destroy most of the proteins,amino acids,and peptides of Chinese medicine and result in the loss of efficacy.The far-infrared drying method is suitable for drying thin-layer medicinal materials and is friendly to the environment.Freeze-drying can preserve the active ingredients very well and greatly retain the efficacy,but it has obvious limitations in preserving some Chinese medicinal materials that need to kill enzymes and protect glycosides;besides,the cost is relatively high and the drying time is long. 展开更多
关键词 fresh medicine drying method natural drying hot air drying microwave drying FAR infrared drying freeze drying
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发热包传热效果及其对冻干鱼肉复水品质的影响
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作者 郝淑贤 韦丽娜 +6 位作者 魏涯 黄卉 相欢 赵永强 岑剑伟 王迪 李来好 《广东海洋大学学报》 CAS CSCD 北大核心 2024年第4期139-146,共8页
【目的】探究发热包传热影响因素及其对冻干鱼肉复水品质的影响,为罗非鱼自热产品开发与推广提供参考。【方法】研究热源质量(70、80、90和120 g)、激活剂用量(发热包质量的2.0倍、2.5倍、3.0倍和3.5倍)、内胆材质[聚丙烯(PP)和铝]和环... 【目的】探究发热包传热影响因素及其对冻干鱼肉复水品质的影响,为罗非鱼自热产品开发与推广提供参考。【方法】研究热源质量(70、80、90和120 g)、激活剂用量(发热包质量的2.0倍、2.5倍、3.0倍和3.5倍)、内胆材质[聚丙烯(PP)和铝]和环境温度(6、17和25℃)对发热包传热效果的影响,分析自热过程鱼肉复水品质的变化。【结果】随热源质量增加,传热效果显著提高(P <0.05),持续保温效果增强;激活剂用量为发热包质量的3.0~3.5倍时,传热效果较好。热源放热量、吸热量与热源质量、环境温度呈正相关。发热包质量为90 g,激活剂用量为发热包质量的3.0倍时,25℃条件下反应初期水合反应剧烈,反应使发热包体积胀大2倍以上,释放大量热能,促进干制鱼肉快速复热复水。内胆材质对产品传热影响差异不显著(P> 0.05)。10~15 min鱼块内部基本复水,鱼肉中心温度达到90℃以上,复水后鱼肉硬度约为70 g,弹性和咀嚼性影响不显著。【结论】热源质量高于90 g,激活剂用量3.0~3.5倍,铝和PP材质,6℃以上的环境温度均可满足发热要求,此条件下,10~15 min复热时间冻干鱼肉品质较好,符合自热产品速食需求。 展开更多
关键词 发热包 传热效果 冻干鱼肉 质构
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