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1.
ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｉｓｋｎｏｗｎｔｈａｔｔｈｅｒｅａｒｅｓｅｖｅｒａｌｔｙｐｅｓｏｆｐｉｇｍｅｎｔａｔｉｏｎｍｕｔａｎｔｓｗｉｔｈｄｉｆｆｅｒｅｎｔｃｏｌｏｒａｓｃｏｍｐａｒｅｄｗｉｔｈｔｈｅｗｉｌｄｔｙｐｅｉｎｓｏｍｅｓｐｅｃｉｅｓｏｆＰｏｒｐｈｙｒａ (Ａｒｕｇａ,1 974 ;Ｍｉｕｒａｅｔａｌ.,1 974 ;Ｍｉｕｒａ,1 985) .ＩｎＰ .ｙｅｚｏｅｎｓｉｓ,ｔｈｅｙｅｌｌｏｗｔｙｐｅｍｕｔａｎｔｗａｓｏｂｔａｉｎｅｄｉｎｌａｂｏｒａｔｏｒｙｂｙｃｒｏｓｓｉｎｇｒｅｄａｎｄｇｒｅｅｎｔｙｐｅｐｉｇｍ… 相似文献
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There are many reports that cells (protoplasts) separated from the thallus of Porphyra by enzyme can develop to normal leafy thalli in the same way as monopores. But there are few investigations on the subcellular structure of the isolated vegetative cell for ccmparison with the subcellular structure of monospores. To clarify whether the separated and cultured cells undergo the same or similar ultrastructure changes during culture and germination as monospores undergo in their formation and germination, we observed their ultrastructure, ccxnpared them with those of the monospore and found that the ultrastructure of separated and cultured cells did not have the characteristic feature as that of monospore formarion, such as production of small and large fibrous vesicles, but was acccxnpanied by vacuolation andstarch mobilization like that in monospore germination. The paper also discusses the relations between monospores and separated and cultured cells. 相似文献
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DEVELOPMENT OF SUSPENDED CONCHOCELIS OF PORPHYRA HAITANENSIS (BANGIALES, RHODOPHYTA) 总被引：2，自引：0，他引：2
INTRODUCTIONAferthelifehistoryofPorphrmwasdescrihed(Drew,l949;KUIDgi,1953;TsengandChang,l954),researchwasfocusedonthegrowthanddevelopmentofPorphpecon-chocelis(TsengandChang,1955;IwasakiandMatsudaira,l963;Waalandetal-,1987).PorphrmhaitanensisisaChinesespeciesveryimPOrtanforcultivationforcom-mercialproductioninsouthemChina.ConchocelisinshellsisthemainsoureeOfcon-chosPoresusedtoseedtheculturenets.However,ourknOWedgeofPoIPllyTahaitanensisisstilllithetedandtheinformationconcerningsee… 相似文献
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R-phycoerythrin from Porphyra haitanensis exists in two aggregaion states with different molecularweights. A more highly aggregated form, RPE I,Was chromatographed on Bio-Rex 70 column with ureasolution (pH 3.0) as eluent, and the molecular weights of the 3 subunits (α,β,γ) obtained were determinedon SDS-PAGE at 18000, 19200 and 30000, respatively. α subunit carried two phycoerythrobilin (PEB),β subunit, three PEB and one phycourobilin (PUB),γ subunit, one PEB and three PUB chromophores.The molar ratio of α,β, and γ subunits of RPE I wn 6:6:1, and their subunit composition was con-fired to be (αβ)_6γon account of the molecular weight of RPE I, 232000.A lower aggregated form, RPE Ⅱ, contained α and β subunits similar to those of RPE I, but itssubunit composition was the (αβ) monomer of RPE. 相似文献
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IAA 3-Indolylaceic acid, NAA a-Naphthylacetic acid and Cytokinins in PESI culture mediumwere used in a study on the effects of plant hormones on the growth of free-living conchocelis ofPorphyra yezoensis which showed that its growth in medium with cytokinins, IAA and NAA was morerapid than that in medium with non-phytohormones, that the optimal concentrations for promotinggrowth were 10μg/L for IAA and ZA (Zeatin), and 0.1 μg/L for BA 6-Benzyl amino purine and KIN6-Furfurylamino- purine. Mix use of NAA, IAA and cytokinins, NAA/ZA 1-1000/1μg/L, NAA/BA10/1-1000μg/L, NAA/KIN 1/1-1000μg/L promoted growth. IAA/ZA 0.1 - 1/0.1 - 1 μg/L, IAA/BA0.1 - 1/0.1 - 10 μg/L IAA/KIN 1/0.1 - 1000μg/L also promoted growth. 相似文献
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imDUCnONManymolectilarbiologybasedDNAtecboqUesPbodepowrfulmeansforstUdvingofgeneticvariationandphylDgenehcrelationships.AmoleculartecboqUebasedonthePOl}-menachainreaction(PCR)isaneffeChvetoolforraPididentificationofgeneticTnarersknownasRandomAInPlifiedPolymorphicDNA(m)(Wlliamsetal.,l99o;Welsh&McClelland,l99o).Sucheders,derivedfromPrindngsitesrandoInldistributedthIDughoutthegenome,areinheritedinaMendelianPatem.ThesePOlyTnorphismsallowtheanalsisofcomplexgenomeswithoutPriorknoWl… 相似文献
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The structural feature of agar polysaccharides from Porphyra haitanensis grown in south China and transplanted to the north was investigated by fractioriation on DEAE - Sephadex A 50, chemical analysis, and infrared and 13C - NMR spectroscopy.The agars composed mainly of Charged molecules were eluted from DEAE - Sephadex A 50 with 1.0 mol/L- NaCl solution from the southern P. haitanensis and with 0.5 mol/L NaCl from the northern one. The 13C-NMR spectra showed that agarobiose [(1 -3)- B D - galactopyranosyl - (1 -4)-3,6-anhydro-a-L-galactopyranose] and the biological precursor of agarobiose [(1-3} B-D-galactopyra nosyl- (1-4)- 6- sulfate-a- L-galactopyranose ] were the major disaccharide repeating units in the charged fractions. The content of the biological precur sor in the agar polysaccharides from southern P. haitanensis was higher than that in the northern one, the content of the biological precursor extracted from cold water was higher than that from hot water, and the content of 6- OMe-D-galactos 相似文献
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Results of the experiment of northward transplantation of Porphyra haitanensis showed thatintercrop of P. haitanensis with Bay Scallop is feasible because the growth duration of both of them is about the same in August - December.Full use of cultivating area, lowering its cost and increasing its product per unit area as well as improving the ecological envronment are realized during intercrop. 相似文献
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江平盆地侏罗系为一套内陆河湖相沉积,地层结构及岩性变化复杂。可分３个基本层序组,其变化特征,反映了中晚侏罗世江平盆地从扩张到萎缩时期沉积变化规律和沉积体系域变化过程,具有物源丰富、湖水浅、相变快等沉积特点,其层序地层及体系域特征与大陆边缘盆地相比有较大的差异。 相似文献
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?????й????363????????λ???????????????????????????NAKAI???????3???????????????????????????????9?????????????????????????????????????????????????????????A??B??C??D??E????????????????????????? 相似文献
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通过分析咸阳市区低级阶地深层地下水资料 ,说明当地在 30 0m以下赋存比较丰富的地下水资源。因此 ,进一步研究咸阳市区深层地下水特征具有重要意义 相似文献
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正确的晶体定向,其晶体几何常数应与内部结构中的晶胞参数一致,而在《砂矿物图册》中的方柱石和钨铅矿、《系统矿物学》上册中的褐锰矿,却是"晶形的（100）与单位晶胞的（110）相同"。在《系统矿物学》下册中的钼铅矿和《砂矿物图册》中的甘汞、黄铜矿、金红石及《系统矿物学》上册中的黄铜矿、块黑铅矿、金红石,虽然走向正确,但在矿物晶形制图和单形符号标注上,有些差错;还有一些晶形图的差错可能是由于做图不规范或清绘时笔误造成的,如《系统矿物学》上册中的软锰矿、《砂矿物图册》中的钙轴云母和铜铀云母等等。鉴于此,笔者对方柱石、钨铅矿、银铅矿、甘汞、软锰矿、钙铀云母、铜铀云母、重担铁矿、锡石、氟镁石、黄铜矿、褐锰矿、块黑铅矿、金红石等14种矿物晶形图的差错做了改正。首先用上述14种矿物的晶胞棱长计算出各矿物在原书中所给定的诸单形的晶面角度值（方位角平和极距角产）;再依此做出各矿物的极射赤平投影;然后,对原书中各矿物的晶形图进行分析,找出并改正其中的差错部分;最后,利用正确的定向,用极射赤平投影作晶体立体图的方法,做出上述各矿物的精确的晶体立体图形,并做简要的文字描述。 相似文献
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本文分析了造成成都市蔬菜外运损耗的原因,并利用逐步回归法建立了青芹外运损耗率与沿途气象条件之间关系的数学模型,对车厢内青芹的热负荷和需冰量进行了计算,计算结果为成都市蔬菜安全外运的车厢内需冰量及利用沿途气象条件来减少损耗提供了科学依据。 相似文献
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GNSS����ƽ̨���ݴ���Ŀɿ��Է��� 总被引：1，自引：0，他引：1
????????????????GNSS?????????????????????????????????????????????????????????????????????????????????GPS????GLONASS?????????????????????????Galileo???????????η?????????澫?????????????????????????????????????????????? 相似文献
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梁专明 《国土资源导刊(湖南)》2002,21(1):69-72
城市生活垃圾卫生填埋场,必须进行水文地质工程地质环境地质综合勘查.长沙市的生活垃圾卫生填埋场勘查,采用了地形测量、水工环地质综合测绘、工程物探、工程钻探、压(注、抽)水试验、原位测试及室内试验等方法手段,提交的技术成果满足了设计、施工要求. 相似文献
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�����Եر��α�������Ƚ��������ȷ�� 总被引：1，自引：1，他引：0
???????????????λ????????λ?????????η??????С???????????????????????飬???????????????????????????????λ?α????????????衣???Ч????????λ?ú?????????????????????′??????????λλ??????????????????GPS????????????????????м????????÷?????????α??????????????Ч??? 相似文献
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谭壁光 《成都信息工程学院学报》1994,(4)
根据我国民航近１０年来发生的飞行事故调查材料，总结了飞行事故与能见度的关系，分析了造成事故的能见度条件的某些特征和原因，着重讨论了在飞机着陆阶段能见度突变的某些规律，提出了一些避免低能见度事故的建议。 相似文献