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Photocatalytic degradation of organic pollutants using green oil palm frond-derived carbon quantum dots/titanium dioxide as multifunctional photocatalysts under visible light radiation 认领 引用 被引量：4
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作者 Zeng Wei Heng Woon Chan Chong +2 位作者 Yean Ling Pang Lan Ching Sim Chai Hoon Koo 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2022年第11期21-34,共14页
The present work suggested the use of waste oil palm frond as an alternative precursor for nitrogendoped carbon quantum dots(NCQDs)and proposed a straightforward in-situ hydrothermal method for the preparation of NCQD... The present work suggested the use of waste oil palm frond as an alternative precursor for nitrogendoped carbon quantum dots(NCQDs)and proposed a straightforward in-situ hydrothermal method for the preparation of NCQDs/TiO2nanocomposites.The elemental composition,morphological,structural and optical characteristics of NCQDs/TiO2nanocomposites have been comprehensively investigated.The successful grafting of NCQDs on TiO2matrix was confirmed by the formation of Ti AOAC bond and the electronic coupling between theπ-states of NCQDs and the conduction band of TiO2.For the first time,the oil palm frond-derived NCQDs/TiO2was adopted in the photodegradation of methylene blue(MB)under visible-light irradiation.As a result,the photocatalytic efficiency of NCQDs/TiO2nanocomposites(86.16%)was 2.85 times higher than its counterpart TiO2(30.18%).The enhanced performance of nanocomposites was attributed to the pivotal roles of NCQDs serving as electron mediator and visiblelight harvester.Besides,the optimal NCQDs loading was determined at 4 ml while the removal efficiency of NCQDs/TiO2-4 was the highest at a catalyst dosage of 1 g.L-1under alkaline condition.This research work is important as it proposed a new insight to the preparation of biomass-based NCQDs/TiO2using a facile synthetic method,which offers a green and sustainable water remediation technology. 展开更多
关键词 Oil palm frond biomass N-doped carbon quantum dots Titanium-dioxide In-situ hydrothermal Visible light photocatalysis Methylene blue
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Investigation of Mechanical Properties for Reinforced Polyester Composites with Palm Fronds 认领 引用
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作者 Ahmad E. Eladawi A. H. Rajpar 《Journal of Materials Science and Chemical Engineering》 2020年第3期74-84,共11页
Natural fibers have become essential elements to produce composites, which have the renewability, sustainability, low cost and less health hazardous. Natural wastes improved the physical and mechanical properties of p... Natural fibers have become essential elements to produce composites, which have the renewability, sustainability, low cost and less health hazardous. Natural wastes improved the physical and mechanical properties of polyester-based composites. Reinforced polyester composites with natural fibers are spread widely in recent decades as an alternative to synthetics. This paper deals with effectiveness of palm fronds when they were added to a polyester. Percentage of palm fibers with respect to polyester is considered through present work. A Pin-on-disc tribometer has been used in experimental work under external forces, and the correlations of coefficient of friction have been used to make analysis of the experimental results. Ibertest universal testing machine was used to measure the tensile strength at a crosshead speed of 8 mm/min. The experimental analysis shows the improvement of properties of the used reinforced polyester, where, the results show that the highest values of coefficient of friction are 1.16667 for 5 N load and the lowest value is 0.55 for 9 N load. And the change for load 11 N is not significant. And also, 7.01 MPa is the highest value for tensile strength with the lowest value of modulus of rigidity 5.84 when the palm frond content is 3% and the lowest value of tensile test is 4.81 MPa with the highest value of modulus of rigidity 11.9 when 21% content. 展开更多
关键词 Friction Coefficient Reinforced Polyester Composites Palm Fronds Modulus of Rigidity Tensile Strength
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Discovery of bipinnatifid fronds of Protoblechnum contractum(Gu et Zhi) 认领 引用 被引量：2
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作者 SUN Bainian HEN Guanglong 《Chinese Science Bulletin》 1999年第4期381-383,共3页
IN Permian floras of China,a dispute over the relationship among the Protoblechnum and other similar plants such as Compsopteris,Glenopteris and Supaia has been existing for a long time,and moreover it has not been co... IN Permian floras of China,a dispute over the relationship among the Protoblechnum and other similar plants such as Compsopteris,Glenopteris and Supaia has been existing for a long time,and moreover it has not been completely solved up to now.Halle placed a few simple pinnate fronds from the Shihhotze Formation in the genus Protoblechnum and named them Protoblechnum Wongii Halle 70 years ago when he was studying the fossil plants from the Late Palaeozoic strata in Shanxi,China.He did not think forked or unforked fronds as an important dividing genus condition in discussing the distinction among Protoblechnum and other relative fossils.Zalessky alSO found some specimens similar to Chinese Protoblechnum while he studied the Permian fossil plants from Russia. 展开更多
关键词 very over Discovery of bipinnatifid fronds of Protoblechnum contractum Gu et Zhi
Phenol contaminated municipal wastewater treatment using date palm frond biochar:Optimization using response surface methodology 认领 引用 被引量：1
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作者 Yohanna Haile Fseha Jamal Shaheen Banu Sizirici 《Emerging Contaminants》 CSCD 2023年第1期53-67,共15页
Phenol is classified as an emerging contaminant which can be very toxic even at low concentrations and should be removed from wastewaters before reaching the environment.In this study date palm frond and leaf were pyr... Phenol is classified as an emerging contaminant which can be very toxic even at low concentrations and should be removed from wastewaters before reaching the environment.In this study date palm frond and leaf were pyrolyzed at different temperatures to identify the best adsorbent(feedstock)and pyrolysis temperature to remove phenol from aqueous solutions.Date palm frond pyrolyzed at 600℃,termed DPF600,achieved the highest phenol removal rates of 64%and adsorption capacity of 15.93 mg/g.Response surface methodology approach using Box-Behnken design was implemented to obtain the optimal pH(6),contact time(20 h)and dosage(0.1 g)for the maximum phenol adsorption.A predicted adsorption capacity was found as 16.62 mg/g which was in close agreement with the experimental adsorption capacity of 17.38 mg/g.Isotherm and kinetic models in both linear and non-linear forms indicated that Freundlich model(R2=0.99,χ2=0.02,RMSE=1.09)and pseudo-second order model(R2=0.99,χ2=0.85,RMSE=5.41)fit best the obtained experimental data.Thermodynamics calculations affirmed that the adsorption of phenol onto DPF600 biochar was endothermic and spontaneous.The point of zero charge was found to be at 6.5 for DPF600 biochar.Scanning electron microscopy coupled with energy dispersive X-ray,Fourier transform infrared spectroscopy and X-ray diffraction confirmed adsorption of phenol onto DPF600 biochar.Application of DPF600 biochar to remove phenol from synthetic primary and secondary treated wastewater samples achieved 60 and 85%removal rates and 241 mg/g and 22.28 mg/g adsorption capacities,respectively.Regeneration studies showed promising adsorption capacities indicating the efficacy of DPF600 for the removal of phenol from wastewater. 展开更多
关键词 Phenol contaminated wastewater Date palm frond Biochar Box-behnken design Response surface methodology Adsorption capacity
Oil Palm Particleboard: Properties and Fungi Susceptibility 认领 引用 被引量：1
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作者 Nur Azreena Idris Madihah Ahmad Zairun +2 位作者 Aisyah Humaira Alias Zawawi Ibrahim Noorshamsiana Abdul Wahab 《Journal of Renewable Materials》 EI CAS 2025年第1期163-180,共18页
The utilization of oil palm biomass in the production of high-value products has increased substantially.Due to the presence of sugars and starches in their tissues,oil palms have an exceptionally low natural resistan... The utilization of oil palm biomass in the production of high-value products has increased substantially.Due to the presence of sugars and starches in their tissues,oil palms have an exceptionally low natural resistance to fungi,making them susceptible to contamination.In this study,the properties of particleboard made from oil palmfibers,namely empty fruit bunches(EFB),oil palm trunks(OPT),and oil palm fronds(OPF)fibers and its poten-tial for fungal attack were evaluated.The chemical composition,spectroscopic characterization,morphological features,and elemental analysis of oil palm biomassfibers were identified and thoroughly examined.The mechan-ical properties and dimensional stability of the boards were assessed based on Japanese Industrial Standards(JIS)and American National Standards Institute(ANSI)guidelines.The density,strength,and moisture resistance of particleboard made from OPTfibers may vary from those made from OPF and EFB due to inherent changes in chemical composition andfiber structure.These differences have an impact on the overall performance of the particleboard.Based on the ANOVA and Tukey’s test results,significant differences in elasticity properties were observed mainly between OPT and otherfibers,while bending strength revealed notable differences between various pairs of particleboards.The evaluation also highlighted variations in dimensional stability and water absorption capabilities.However,bending strength properties did not demonstrate any significant deviations.For the fungi test,fungal activity on the boards was observed over a two-week period in a controlled environment.The study revealed that oil palm-based particleboard exhibited susceptibility to fungal attacks,particularly from Aspergillus sp.,Trichoderma sp.,and Paecilomyces variotii.Thesefindings highlight the necessity for additional treatments to control or prevent fungal growth,thereby enhancing the commercial value of the particleboards. 展开更多
关键词 Particleboard medium densityfiberboard(MDF) empty fruit bunches(EFB) oil palm trunks(OPT) and oil palm fronds(OPF)
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油棕枝叶制备刨花板的工艺可行性研究 认领 引用
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作者 郭晋兴 刘如 张明昌 《中国人造板》 2025年第11期24-29,共6页
为推动油棕砍伐废弃物的高值利用,以油棕枝叶与回收废弃木材托盘为原料,研究其用异氰酸酯(MDI)胶黏剂制备定向刨花板的可行性。通过对油棕枝叶刨花尺寸筛分与形态分析、板材结构设计与性能检测,系统评价了油棕枝叶制备刨花板的性能。结... 为推动油棕砍伐废弃物的高值利用,以油棕枝叶与回收废弃木材托盘为原料,研究其用异氰酸酯(MDI)胶黏剂制备定向刨花板的可行性。通过对油棕枝叶刨花尺寸筛分与形态分析、板材结构设计与性能检测,系统评价了油棕枝叶制备刨花板的性能。结果表明:油棕枝叶粗刨花与木刨花按1:1比例混合制备的定向刨花板满足GB/T41715—2022《定向刨花板》中0SB/3型板要求将油棕枝叶粗刨花作为表层,木材刨花为芯层制备的定向刨花板性能明显下降:全油棕枝叶粗刨花或细刨花制备的普通刨花板满足GB/T4897—2015《刨花板》中P2型家具板要求;油棕枝叶刨花形态和铺装板坏结构对板材性能影响显著,需进一步优化刨片工艺,提升大片粗创花得率,以提高板材力学性能,并推动其产业化。 展开更多
关键词 油棕枝叶 定向刨花板 刨花尺寸
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Phytochemical and anti-bacterial activity of epidermal glands extract of Christella parasitica (L.) H. Lev. 认领 引用 被引量：15
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作者 Paul Raj K Irudayaraj V +1 位作者 Johnson M Patric Raja D 《Asian Pacific Journal of Tropical Biomedicine》 CAS 2011年第1期8-11,共4页
Objective:To study the morphology,biochemistry and bioactivity of the epidermal glands of the glandular morphotype of Christella parasitica(C.parasitica)(L.) H.Lev.Methods: Morphological studies on epidermal glands we... Objective:To study the morphology,biochemistry and bioactivity of the epidermal glands of the glandular morphotype of Christella parasitica(C.parasitica)(L.) H.Lev.Methods: Morphological studies on epidermal glands were earned out by using light microscope and scanning electron microscope.To prepare the extract,the shade-dried fronds of glandular morphotype were soaked in acetone.For antibacterial studies paper disc method was followed by using various pathogenic bacteria.Results:Detailed micromorphological,phytochemical and bioactivity studies on a medicinal fern C.parasitica(L.) H.Lev.showed its inlraspecific variation in antibacterial activity.The presence or absence of the epidermal glands was the key factor for antibacterial activity in the morphovariants of this species.The epidermal glands were orange-coloured,stalked and elongated ones of about 84.2μm×45μm,and distributed on the undersurface of cosla,coslules and veins in croziers,young and mature leaves.Frequency of glands varied from 15/cm on costa in mature leaves to 140/cm on costules in croziers.The acetone extract of the glands showed antibacterial activities and also toxic effect against mosquito larvae and tadpoles of frog.Preliminary phytochemical analysis and HPLC studies of the gland extract showed the presence of various kinds of terpenoids,alkaloids,tannins,saponins and flavonoids in it.Conclusions:The present study shows that epidermal glands of the glandular morphotype of C. parasitica(L.) H.Lev.have several bioactive compounds and such rare moiphovariant should be conserved in nature.The next step is to isolate the pure compounds and to screen the bioactivity of individual compounds of the epidermal glands. 展开更多
关键词 Epidermal glands Christella parasitica Bioactivity Phytochemical activity Anti-bacterial activity Morphology Biochemistry Glandular morphotype Light microscope Shade-dried frond Bioactive compound Morphovariant Preliminary phytochemical analysis Gland extract Flavonoid
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三十烷醇对海萝孢子萌发、幼苗及藻体生长的影响 认领 引用 被引量：12
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作者 陈素文 吴进锋 +2 位作者 陈利雄 陈师亮 肖瑞红 《华南农业大学学报》 CAS CSCD 北大核心 2011年第1期78-82,共5页
研究了三十烷醇对海萝孢子萌发、幼苗及藻体生长的影响.第1个试验,用0.50、1.00、2.00 mg.L-1的三十烷醇分别对附着后3 d的海萝孢子进行14和24 h的浸泡,每隔10 d处理1次,共处理3次,试验进行2个月.第2个试验,用0.25、0.50、1.00、2.00 mg... 研究了三十烷醇对海萝孢子萌发、幼苗及藻体生长的影响.第1个试验,用0.50、1.00、2.00 mg.L-1的三十烷醇分别对附着后3 d的海萝孢子进行14和24 h的浸泡,每隔10 d处理1次,共处理3次,试验进行2个月.第2个试验,用0.25、0.50、1.00、2.00 mg.L-1的三十烷醇浸泡平均长度为1.5 mm海萝幼苗,分别处理1次和4次（每隔15 d处理1次）,每次处理时间24 h,试验进行2个月.第3个试验,用0.50、1.00、2.00 mg.L-1的三十烷醇分别对海萝藻体进行18和24 h的浸泡,只处理1次,试验进行1个月.试验结果表明：三十烷醇对藻体增质量及幼苗长度生长影响不明显,对幼苗的分叉以及孢子萌发形成的盘状体的生长、萌发、存活影响显著.三十烷醇质量浓度为0.50和1.00 mg.L-1时,对海萝盘状体的生长及盘状体萌发出直立体都有促进作用,其中,0.50 mg.L-1的三十烷醇,处理14 h效果最好;2.00 mg.L-1三十烷醇处理24 h时,其盘状体的生长和存活比对照组明显差.0.25~2.00mg.L-1三十烷醇对幼苗的分叉都具有促进作用,处理4次的效果比处理1次的好;而处理1次的以质量浓度为1.00 mg.L-1的效果最好,且与处理4次的相似. 展开更多
关键词 三十烷醇 萌发 生长 盘状体 幼苗 藻体 海萝
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New phenomenon in early development of sporelings in Gracilaria asiatica Chang et Xia(Gracilariaceae,Rhodophyta) 认领 引用 被引量：1
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作者 赵凤娟 王爱华 +1 位作者 刘吉东 段德麟 《Chinese Journal of Oceanology and Limnology》 2006年第4期364-369,共6页
Study on the early development of sporelings from carpospores of Gracilaria asiatica Chang et Xia was conducted indoors under controlled culture conditions. Besides normal development of sporelings, a new developmenta... Study on the early development of sporelings from carpospores of Gracilaria asiatica Chang et Xia was conducted indoors under controlled culture conditions. Besides normal development of sporelings, a new developmental phenomenon of filamentous frond was observed. It was composed of one or two rows of cells, and took place from the outmost brim of the basal disc. During the early disc stage of germinated carpospores, one or two filamentous fronds formed on about 10% basal discs. Simul-taneously, young fronds began to arch slightly from the centers of single and coalescent discs; lately more filamentous fronds up to 80% appeared on the brims of basal discs. Meanwhile one or more upright fronds protuberated on the basal discs. Generally, filamentous fronds exhibited in self-existence or co-existence forms with normal young sporelings on the same basal disc, and single cell detached from filamentous fronds developed into a new filamentous frond. This new phenomenon exhibited a unique differentiation pathway during the early development of G. asiatica, which would be potential for the ap-plication in artificial sporelings nursery. 展开更多
关键词 filamentous fronds basal disc sporeling early development Gracilaria asiatica
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荚果蕨贯众提取物中黄酮类成分的含量测定和抗氧化活性研究 认领 引用 被引量：8
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作者 李姝蓓 张东 +4 位作者 杨岚 李玉洁 朱晓新 付梅红 方婧 《中国药学杂志》 CAS CSCD 北大核心 2013年第21期1860-1863,共4页
目的建立荚果蕨贯众提取物中3种主要黄酮类成分的含量测定方法,并对荚果蕨贯众提取物的抗氧化能力进行评价。方法采用HPLC测定提取物中黄酮类成分含量。色谱柱为Kromasil C18柱(4.6 mm×250 mm,5μm);流动相为甲醇-水(水中含0.1%磷... 目的建立荚果蕨贯众提取物中3种主要黄酮类成分的含量测定方法,并对荚果蕨贯众提取物的抗氧化能力进行评价。方法采用HPLC测定提取物中黄酮类成分含量。色谱柱为Kromasil C18柱(4.6 mm×250 mm,5μm);流动相为甲醇-水(水中含0.1%磷酸)70∶30;流速为1.00 mL·min-1;检测波长295 nm;柱温40℃。采用DPPH自由基清除法评价提取物抗氧化活性。结果对照品去甲氧基荚果蕨素、荚果蕨素、荚果蕨黄素记为D1、D2、D3分别在0.058～0.58、0.045～0.45、0.003～0.028 mg·mL-1内线性关系良好,r分别为0.999 8、0.999 8、0.998 3,平均回收率分别为96.93%、97.15%、96.41%。以IC50值(清除率为50%时,抗氧化剂的浓度值)作为评价指标,测得荚果蕨贯众提取物的IC50值为0.55 mg·mL-1。结论此含量测定方法具有良好的准确性,重复性和稳定性,可用于荚果蕨贯众提取物的质量控制。该提取物具有一定的抗氧化活性。 展开更多
关键词 荚果蕨贯众 黄酮 高效液相色谱法 DPPH自由基清除法 半数致死量值
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针对浮萍暴发式生长的植物源除草剂的筛选 认领 引用 被引量：6
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作者 张饮江 宋盈颖 +3 位作者 赵圆 辛铎 黄富锡 邵留 《上海海洋大学学报》 CAS CSCD 北大核心 2016年第4期575-581,共7页
浮萍暴发式生长给河道、湖泊、池塘等水体生态环境造成了较大困扰。探讨中草药提取液对浮萍植物的生长影响,以期为新型植物源除草剂的研制提供科学依据。通过对浮萍表观生长状态观察及对叶绿素、生物量等生长指标的检测,研究了7种常见... 浮萍暴发式生长给河道、湖泊、池塘等水体生态环境造成了较大困扰。探讨中草药提取液对浮萍植物的生长影响,以期为新型植物源除草剂的研制提供科学依据。通过对浮萍表观生长状态观察及对叶绿素、生物量等生长指标的检测,研究了7种常见中草药(甘草、地锦草、金钱草、泽漆、泽泻、黄连、鱼腥草)提取液对紫背浮萍(Soirodela polyrhiza)生长的影响。结果表明:黄连提取液对浮萍叶状体分蘖的抑制作用最佳,培养期间浮萍叶状体数几乎未增加;地锦草提取液对浮萍生物量增长的抑制能力最佳,培养96 h后浮萍生物量下降至对照组的69%;泽泻提取液对浮萍色素水平的影响最大,培养96 h后实验组叶绿素含量下降55%以上,杀青效果明显。因此,从中草药宝库中寻找抑制浮萍暴发的植物源除草剂是可行的。 展开更多
关键词 紫背浮萍 生长抑制 植物源除草剂 叶状体 叶绿素
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4种桫椤初生叶的形态发育及其系统学意义 认领 引用 被引量：7
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作者 檀龙颜 郭立波 刘保东 《西北植物学报》 CAS 北大核心 2009年第5期957-960,共4页
用腐叶土培养海南白桫椤(Sphaeropteris hainanensis)、阴生桫椤(Alsophila latebrosa)、刺桫椤(A.spinu-losa)和滇南桫椤(A.austroyunnanensis)的孢子,获得有性生殖苗.观察并比较了幼孢子体最初4枚叶片形态发生的详细过程,据此讨论了... 用腐叶土培养海南白桫椤(Sphaeropteris hainanensis)、阴生桫椤(Alsophila latebrosa)、刺桫椤(A.spinu-losa)和滇南桫椤(A.austroyunnanensis)的孢子,获得有性生殖苗.观察并比较了幼孢子体最初4枚叶片形态发生的详细过程,据此讨论了其种属划分的合理性及相关的系统学意义. 展开更多
关键词 海南白桫椤 阴生桫椤 刺桫椤 滇南桫椤 幼叶 系统学意义
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二苯脲延缓紫萍半叶状体衰老的作用 认领 引用 被引量：4
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作者 朱晔荣 宪禹 +4 位作者 田宝静 江兵泽 王淑芳 王宁宁 王勇 《南开大学学报（自然科学版）》 CAS 北大核心 2004年第4期90-94,共5页
在长日照条件下,10-7mol/L的二苯脲对紫萍半叶状体就有保绿的作用,10-5～2×10-4mol/L的二苯脲还可以明显地促进叶绿素的合成和干重的增加,提高丝氨酸乙醛酸转氨酶的活性,延缓半叶状体的衰老.实验结果表明,二苯脲本身具有细胞分裂... 在长日照条件下,10-7mol/L的二苯脲对紫萍半叶状体就有保绿的作用,10-5～2×10-4mol/L的二苯脲还可以明显地促进叶绿素的合成和干重的增加,提高丝氨酸乙醛酸转氨酶的活性,延缓半叶状体的衰老.实验结果表明,二苯脲本身具有细胞分裂素的活性,能代替内源细胞分裂素起到抗衰老的作用;二苯脲同时也能推迟半叶状体中内源细胞分裂素含量的降低.另外,在培养液中加入外源L-丝氨酸,可以抗拮二苯脲对紫萍半叶状体衰老的延缓作用,说明二苯脲抗衰老的机制类似于其它细胞分裂素. 展开更多
关键词 二苯脲 紫萍 半叶状体 延缓衰老 作用机制
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油棕叶片冷冻切片技术研究 认领 引用 被引量：5
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作者 张大鹏 冯美利 +2 位作者 秦海棠 王永 曹红星 《热带农业科学》 2018年第11期85-88,共4页
为了便于研究油棕叶片的解剖结构,获得高质量的冷冻切片,对油棕叶片冷冻切片关键参数进行研究,优化了快速观测油棕叶片解剖结构的冷冻切片方法。结果表明:以油棕嫩叶为实验材料,初切成2 mm×2 mm规格;冷冻包埋块为5 mm×5 mm,在... 为了便于研究油棕叶片的解剖结构,获得高质量的冷冻切片,对油棕叶片冷冻切片关键参数进行研究,优化了快速观测油棕叶片解剖结构的冷冻切片方法。结果表明:以油棕嫩叶为实验材料,初切成2 mm×2 mm规格;冷冻包埋块为5 mm×5 mm,在-30℃冷冻速冻台上,设置冷冻箱-20℃,标本头-10℃,可切出厚度5μm以上的冷冻切片,切片效果好。该方法可用于研究油棕叶片解剖结构的切片制作和显微观测,在油棕种质资源鉴定与评价方面有着广泛的应用价值。 展开更多
关键词 油棕 叶片 冷冻切片
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油棕叶片干燥特性初探 认领 引用 被引量：2
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作者 陆全济 李家宁 +4 位作者 曾宪海 刘钊 李晓文 蒋汇川 李民 《热带作物学报》 CSCD 北大核心 2018年第2期392-397,共6页
为制备油棕叶片重组木,对油棕叶片干燥特性进行了分析。以油棕叶片为研究对象,采用电热鼓风干燥法进行试验,研究处理方式(未去皮、去皮、去皮碾压)、初含水率和干燥温度对油棕叶片干燥特性的影响。结果表明:处理方式、干燥温度对油棕干... 为制备油棕叶片重组木,对油棕叶片干燥特性进行了分析。以油棕叶片为研究对象,采用电热鼓风干燥法进行试验,研究处理方式(未去皮、去皮、去皮碾压)、初含水率和干燥温度对油棕叶片干燥特性的影响。结果表明:处理方式、干燥温度对油棕干燥时间的影响均达极显著水平,初含水率影响达显著水平,其中去皮碾压处理和提高干燥温度更有利于缩短油棕叶片的干燥时间。油棕叶片最优的干燥工艺为去皮碾压、初含水率为50%、干燥温度为130℃,在该条件下的干燥时间为1.42 h。 展开更多
关键词 油棕叶片 干燥特性 干燥 温度 含水率
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基于仿生技术防治平湖油气田外输海底管线冲刷的探讨 认领 引用 被引量：8
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作者 梁富浩 张印桐 +1 位作者 庄亚锋 苗春生 《中国海洋平台》 2011年第4期24-28,46,共5页
以曾两次因冲刷悬空而发生事故的平湖油气田岱山近岸段KP2.6为例,通过比较挖沟、传统抛石、砂袋支撑、水泥压块以及仿生草技术等悬空处理与冲刷控制措施,提出了"砂袋悬空回填与仿生草永久性冲刷防治"方案,系统地探讨将仿生草... 以曾两次因冲刷悬空而发生事故的平湖油气田岱山近岸段KP2.6为例,通过比较挖沟、传统抛石、砂袋支撑、水泥压块以及仿生草技术等悬空处理与冲刷控制措施,提出了"砂袋悬空回填与仿生草永久性冲刷防治"方案,系统地探讨将仿生草技术用于东海海底管线的防护,对东海乃至全国海底管线悬空处理与冲刷防治都有借鉴价值。 展开更多
关键词 海底管线 冲刷 悬空 仿生草
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基于人工培养的浮萍快速无性繁殖营养条件研究 认领 引用 被引量：1
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作者 高晓钰 曹特 +2 位作者 倪乐意 张霄林 丑庆川 《水生生物学报》 CAS CSCD 北大核心 2022年第7期1097-1104,共8页
为探究并优化浮萍人工培养技术,研究以广布种紫萍(Spirodela polyrrhiza)和青萍(Lemna minor)为主要研究对象,探索两种浮萍植物在不同营养水平的Hoagland和Hunter培养液中的鲜重、叶状体数的生长变化状况。结果表明:(1)紫萍和青萍鲜重在... 为探究并优化浮萍人工培养技术,研究以广布种紫萍(Spirodela polyrrhiza)和青萍(Lemna minor)为主要研究对象,探索两种浮萍植物在不同营养水平的Hoagland和Hunter培养液中的鲜重、叶状体数的生长变化状况。结果表明:(1)紫萍和青萍鲜重在Hoagland培养液的不同营养水平下先增加后减少,而在Hunter营养液中呈持续增长趋势;两种浮萍的鲜重最大相对增长率(RGR)分别为0.11和0.18,鲜重受浮萍品种和培养基类型及其不同营养水平影响显著(P<0.05),以青萍在Hunter原液培养基下的无性繁殖产生的生物量最高。(2)紫萍和青萍叶状体数在Hoagland培养液的不同营养水平下先增加后减少,而同鲜重一样在Hunter营养液中呈不断增长趋势;两种浮萍的叶状体最大相对增长率分别为0.14和0.19,叶状体生长的RGR变化同样受浮萍品种和培养基类型及营养水平影响显著(P<0.05),以青萍在Hunter原液的营养环境下收获的叶状体数最高。(3)两种浮萍在Hoagland和Hunter营养液的不同营养水平下鲜重/叶状体比呈下降趋势,表明两种浮萍在适应不同营养时优先繁殖子代叶状体,以扩大种的适合度。研究认为Hunter原液可作为广布种青萍的最优培养条件,可实现短时间内收获较大浮萍鲜生物量和叶状体数,为进一步资源化利用提供原材料。 展开更多
关键词 Hoagland Hunter 鲜重 叶状体 相对增长率 繁殖策略 浮萍
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Economical substrate formulation for mushroom cultivation and food production of mushroom crackers to reduce postharvest waste 认领 引用
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作者 Laila Naher Nor Asmahani Mustaffa Bakri +6 位作者 Siti Ayu Nasiha Muhammad Sukhri Nik Raihan Nik Hassan Hanisah Mohd Firdaus Ganga Norhafizah Md Zain Nurhanan Abdul Rahman Huck Ywinh Ch'ng Seri Intan Mokhtar 《Studies in Fungi》 2024年第1期161-167,共7页
Agriculture residues of oil palm waste are a big issue for palm oil producing countries.The residues from oil palm fronds are the most crucial to convert wealth.This study focused on oil palm-related agro biomass for ... Agriculture residues of oil palm waste are a big issue for palm oil producing countries.The residues from oil palm fronds are the most crucial to convert wealth.This study focused on oil palm-related agro biomass for mushroom substrate formulation for grey oyster mushroom cultivation.Mushrooms are a highly perishable vegetable that turn into postharvest waste within 4 to 7 d at normal temperatures.Therefore,in this study,the unsold mushroom was converted as a cracker food product to reduce the postharvest losses,especially for small-scale mushroom growers.The agriculture biomass used for substrate preparation is a combination of oil palm frond(OPF),oil palm empty fruit bunch(EFB),palm pressed fiber(PPF),and sawdust(SD).SD as a commercial substrate was used as a control in this study,and rice bran(RB)and lime(L)were used as supplement ingredients for all the treatments.The treatments were according to mixed formulation with the ratio of T0(control:97.2%SD,0.8%RB+2%L),T1 as a mixed ratio(60%RS+22.2%EFB+15%PPF+0.8%RB+2%L)and T2 as a mixed ratio(60%OPF+22.2%EFB+15%SD+0.8%RB+2%L).The total yield in four cycles showed 1.2 kg in T0(sawdust),1.4 kg in T1(majority of rice straw),and 1.5 kg(majority of oil palm frond)in T3 treated substrate.In this study,the oil palm frond was received free of charge as compared to sawdust and rice straw.Therefore,it showed that using the oil palm frond not only gave a high yield of mushrooms at the same time,it was 100 X lower in cost.Next,the unsold yielded mushrooms were used for cracker preparation.The results obtained from this study indicate that mushroom crackers contain fat(11.34%),protein(2.19%),and carbohydrate(76.55%)while being high in moisture(7.87%)and ash(2.06%)compared to commercial potato crackers.Overall acceptance of sensory evaluation towards mushroom crackers showed a high'extremely like'percentage,contributing about 66%.Thus,this study found that 66%of participants'extremely liked'the new innovative mushroom crackers.Overall,the results show that oil palm substrate can be an alternative economical substrate for grey oyster mushroom cultivation and food products from mushrooms will be new items in the snack industry. 展开更多
关键词 convert wealththis oil palm waste cracker food product mushroom cultivation agriculture residues agro biomass grey oyster mushroom oil palm fronds
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法国新旧贵族的融合与同化——长袍贵族析评 认领 引用 被引量：5
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作者 刘文立 《中山大学学报（社会科学版）》 CSSCI 北大核心 2003年第3期45-49,72,共5页
文章旨在考察脱胎于平民等级的显宦“长袍贵族”的形成和异化的进程,评析期间新贵族与封建专制王权、旧贵族和下层民众的关系及其演变,从而揭示特权等级必然随着专制政体的倾覆而消亡的历史规律。
关键词 长袍贵族 佩剑贵族 平民等级 专制王权 卖官鬻爵 波莱敕令 高等法院 福隆德运动
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凝胶电泳法研究紫萍半叶状体衰老期间的内肽酶同工酶 认领 引用
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作者 刘清岱 王金菊 +2 位作者 李红涛 赵昱 张治州 《安徽农业科学》 CAS 北大核心 2009年第36期17874-17875,共2页
[目的]研究与紫萍半叶状体衰老相关的内肽酶及其性质。[方法]采用明胶-SDS-聚丙烯酰胺凝胶电泳技术分析与衰老相关的内肽酶同工酶,并用蛋白酶抑制剂分析内肽酶类型。[结果]对紫萍衰老期间内肽酶的分析表明,共有6种内肽酶出现,金属型蛋白... [目的]研究与紫萍半叶状体衰老相关的内肽酶及其性质。[方法]采用明胶-SDS-聚丙烯酰胺凝胶电泳技术分析与衰老相关的内肽酶同工酶,并用蛋白酶抑制剂分析内肽酶类型。[结果]对紫萍衰老期间内肽酶的分析表明,共有6种内肽酶出现,金属型蛋白酶HEP1和半胱氨酸型内肽酶HEP2、HEP4、HEP6是与衰老相关的内肽酶。[结论]在紫萍半叶状体衰老早期金属型内肽酶活性较强,而在衰老后期半胱氨酸型内肽酶大量出现并具有较高的活性。 展开更多
关键词 紫萍 半叶状体 衰老 内肽酶
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