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柚夏柠澈
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开发工业装置工艺包,一定得有发明专利来源吗? 查看更多 1个回答 . 6人已关注
经验求助,卞溴与长链胺亲核取代,一取代? 向各位大神求助,卞溴与长链胺亲核一取代反应的方法、经验、注意事项。 查看更多 6个回答 . 19人已关注
cif晶体解析出错,求指教? 各位朋友,我根据文献通过精修得到了一个cif文件,可是在cif check 的时候出现错误(如下),我第一次接触这个,一头雾水,不知道怎么办,还请各位朋友施于援手啊!!!我同时上传了cif,求帮忙啊!!!不胜感激。 Alert level A SYMM001_ALERT_1_A _symmetry_cell_setting is missing The cell setting should be one of the following * triclinic * monoclinic * orthorhombic * tetragonal * rhombohedral * trigonal * hexagonal * cubic The following tests will not be performed. SYMMS_01,SYMMS_02 CELL002_ALERT_1_A _cell_formula_units_Z is missing Number of formulae per unit cell. The following tests will not be performed. ABSMU_01,CELLZ_01,DENSD_01 EXPT001_ALERT_1_A _exptl_crystal_density_diffrn is missing Density calculated from unit cell and contents (Mg m-3). The following tests will not be performed. DENSD_01,DENSX_01 DIFF001_ALERT_1_A _diffrn_radiation_type is missing The radiation type should contain one of the following * 'Cu K\a' * 'Mo K\a' * 'Ag K\a' * neutron * synchrotron The following tests will not be performed. ABSMU_01,ABSTM_02,CRYSS_01,RADNW_01 DIFF002_ALERT_1_A _diffrn_radiation_wavelength is missing Radiation wavelength (A). The following tests will not be performed. RADNW_01,REFLT_03,REFNR_01,THETM_01 CELL003_ALERT_1_A _cell_measurement_reflns_used is missing Number of reflections used to measure unit cell. CELL004_ALERT_1_A _cell_measurement_theta_min is missing Minimum theta of reflections used to measure unit cell. The following tests will not be performed. CELLT_01 CELL005_ALERT_1_A _cell_measurement_theta_max is missing Maximum theta of reflections used to measure unit cell. The following tests will not be performed. CELLT_01 CELL006_ALERT_1_A _cell_measurement_temperature is missing Measurement temperature (K). The following tests will not be performed. CELLK_01 EXPT004_ALERT_1_A _exptl_absorpt_coefficient_mu is missing Linear absorption coefficient (mm-1). The following tests will not be performed. ABSMU_01,ABSTM_02 EXPT005_ALERT_1_A _exptl_crystal_description is missing Crystal habit description. The following tests will not be performed. CRYSR_01 EXPT009_ALERT_1_A No crystal dimensions have been given. The following tests will not be performed. CRYSS_01,CRYSS_02 EXPT108_ALERT_1_A The magnitudes of the crystal dimensions do not match the min, mid and max definitions EXPT010_ALERT_1_A _exptl_crystal_colour (_pd_char_colour for powder) is missing Crystal colour. The following tests will not be performed. CRYSC_01 DIFF003_ALERT_1_A _diffrn_measurement_device_type is missing Diffractometer make and type. Replaces _diffrn_measurement_type. DIFF005_ALERT_1_A _diffrn_measurement_method is missing Mode of intensity measurement and scan. DIFF007_ALERT_1_A _diffrn_reflns_number is missing Total number of reflections measured. The following tests will not be performed. REFLG_01,REFLT_01 REFL001_ALERT_1_A _reflns_number_total is missing Number of symmetry-independent reflections. The following tests will not be performed. REFLT_01,REFLT_02,REFLT_03,REFNR_01 REFL002_ALERT_1_A _reflns_number_gt is missing Number of reflections > sigma threshold. The following tests will not be performed. REFLG_01,REFLT_02 REFL004_ALERT_1_A _reflns_threshold_expression is missing Sigma expression for F, F2 or I threshold. The following tests will not be performed. REFLE_01 DIFF008_ALERT_1_A _diffrn_reflns_theta_max is missing Maximum theta of measured reflections. The following tests will not be performed REFLT_03,REFNR_01,THETM_01 DIFF013_ALERT_1_A _diffrn_reflns_limit_h_min is missing Minimum h index of measured data. The following tests will not be performed REFLL_01 DIFF014_ALERT_1_A _diffrn_reflns_limit_h_max is missing Maximum h index of measured data. The following tests will not be performed REFLL_01 DIFF015_ALERT_1_A _diffrn_reflns_limit_k_min is missing Minimum k index of measured data. The following tests will not be performed REFLL_01 DIFF016_ALERT_1_A _diffrn_reflns_limit_k_max is missing Maximum k index of measured data. The following tests will not be performed REFLL_01 DIFF017_ALERT_1_A _diffrn_reflns_limit_l_min is missing Minimum l index of measured data. The following tests will not be performed REFLL_01 DIFF018_ALERT_1_A _diffrn_reflns_limit_l_max is missing Maximum l index of measured data. The following tests will not be performed REFLL_01 DIFF019_ALERT_1_A _diffrn_standards_number is missing Number of standards used in measurement. DIFF020_ALERT_1_A _diffrn_standards_interval_count and _diffrn_standards_interval_time are missing. Number of measurements between standards or time (min) between standards. DIFF022_ALERT_1_A _diffrn_standards_decay_% is missing Percentage decrease in standards intensity. REFI001_ALERT_1_A _refine_ls_structure_factor_coef is missing The structure factor coefficient should be one of the following * Inet * Fsqd * F The following tests will not be performed FCOEF_01 REFI003_ALERT_1_A _refine_ls_R_factor_gt is missing R factor of F for reflections > threshold. The following tests will not be performed RFACG_01 REFI005_ALERT_1_A _refine_ls_wR_factor_ref is missing R factor of coefficient for refinement reflections. The following tests will not be performed RFACR_01 REFI007_ALERT_1_A _refine_ls_goodness_of_fit_ref is missing Goodness of fit S for refinement reflections. The following tests will not be performed GOODF_01 REFI009_ALERT_1_A _refine_ls_number_reflns is missing Number of reflections used in refinement. The following test will not be performed REFNR_01 REFI010_ALERT_1_A _refine_ls_number_parameters is missing Number of parameters refined. The following tests will not be performed REFNR_01 REFI011_ALERT_1_A _refine_ls_weighting_scheme is missing The weighting scheme should be one of the following * sigma * calc The following tests will not be performed WEIGH_01 REFI015_ALERT_1_A _refine_ls_shift/su_max is missing Maximum shift/s.u. ratio after final refinement cycle. The following tests will not be performed SHFSU_01 REFI017_ALERT_1_A _refine_diff_density_max is missing Maximum value of final difference map (e A-3). The following tests will not be performed DIFMN_01,DIFMX_01,DIFMX_02 REFI018_ALERT_1_A _refine_diff_density_min is missing Minimum value of final difference map (e A-3). The following tests will not be performed DIFMN_01,DIFMN_02,DIFMN_03 GEOM006_ALERT_1_A _geom_angle_atom_site_label_2 is missing Label identifying the atom site 2. GEOM007_ALERT_1_A _geom_angle_atom_site_label_3 is missing Label identifying the atom site 3. ABSTY01_ALERT_1_A The absorption correction should be one of the following * none * analytical * integration * numerical * gaussian * empirical * psi-scan * multi-scan * refdelf * sphere * cylinder PLAT029_ALERT_3_A _diffrn_measured_fraction_theta_full value Low . 0.000 Why? PLAT043_ALERT_1_A Calculated and Reported Mol. Weight Differ by .. 2724.25 Check PLAT044_ALERT_1_A Calculated and Reported Density Dx Differ by .. 1.0961 Check PLAT050_ALERT_1_A Absorption Coefficient mu Not Given ............ Please Do ! PLAT086_ALERT_2_A Unsatisfactory S Value (Too Low or Not Given) .. 0.00 Check PLAT091_ALERT_1_A No Wavelength Found in CIF - 0.71073 Ang Assumed Please Check PLAT183_ALERT_1_A Missing _cell_measurement_reflns_used Value .... Please Do ! PLAT184_ALERT_1_A Missing _cell_measurement_theta_min Value ...... Please Do ! PLAT185_ALERT_1_A Missing _cell_measurement_theta_max Value ...... Please Do ! PLAT197_ALERT_1_A Missing _cell_measurement_temperature Datum .... Please Add PLAT198_ALERT_1_A Missing _diffrn_ambient_temperature Datum .... Please Add PLAT224_ALERT_1_A Ueq(Rep) and Ueq(Calc) Differ by -0.027 Ang**2 Tb141 Chec And 182 other PLAT224 Alerts More ...PLAT241_ALERT_2_A High 'MainMol' Ueq as Compared to Neighbors of C27 Check And 3 other PLAT241 Alerts More ...PLAT260_ALERT_2_A Large Average Ueq of Residue Including TB1# 0.484 Check PLAT602_ALERT_2_A VERY LARGE Solvent Accessible VOID(S) in Structure ! Info PLAT880_ALERT_1_A N0 datum for _diffrn_reflns_number ............. Please Do ! PLAT881_ALERT_1_A No Datum for _diffrn_reflns_av_R_equivalents ... Please Do ! Alert level B PLAT025_ALERT_1_B Hmin..Lmax Data Incomplete or Missing .......... Please Check PLAT213_ALERT_2_B Atom C36 has ADP max/min Ratio ..... 4.2 oblate And 13 other PLAT213 Alerts More ...PLAT220_ALERT_2_B Non-Solvent Resd 1 O Ueq(max)/Ueq(min) Range 9.3 Ratio PLAT241_ALERT_2_B High 'MainMol' Ueq as Compared to Neighbors of O30 Check And 18 other PLAT241 Alerts More ...PLAT242_ALERT_2_B Low 'MainMol' Ueq as Compared to Neighbors of C20 Check And 5 other PLAT242 Alerts More ...PLAT374_ALERT_2_B Long N - N Bond N172 - N178 . 1.67 Ang. PLAT374_ALERT_2_B Long N - N Bond N175 - N181_d . 1.67 Ang. Alert level C ABSTY02_ALERT_1_C An _exptl_absorpt_correction_type has been given without a literature citation. This should be contained in the _exptl_absorpt_process_details field. Absorption correction given as Not Given PLAT034_ALERT_1_C No Flack Parameter Given. Z > Si, NonCentro .... Please Do ! PLAT141_ALERT_4_C s.u. on a - Axis Small or Missing .............. 0.00000 Ang. PLAT142_ALERT_4_C s.u. on b - Axis Small or Missing .............. 0.00000 Ang. PLAT143_ALERT_4_C s.u. on c - Axis Small or Missing .............. 0.00000 Ang. PLAT144_ALERT_4_C s.u. on alpha Small or Missing .............. 0.0000 Degree PLAT145_ALERT_4_C s.u. on beta Small or Missing .............. 0.0000 Degree PLAT146_ALERT_4_C s.u. on gamma Small or Missing .............. 0.0000 Degree PLAT151_ALERT_1_C No s.u. (esd) Given on Volume .................. Please Do ! PLAT155_ALERT_4_C The Triclinic Unitcell is NOT Reduced .......... Please Do ! PLAT161_ALERT_4_C Missing or Zero s.u. (esd) on x-coordinate for . O1 Check And 193 other PLAT161 Alerts More ...PLAT162_ALERT_4_C Missing or Zero s.u. (esd) on y-coordinate for . O1 Check And 193 other PLAT162 Alerts More ...PLAT163_ALERT_4_C Missing or Zero s.u. (esd) on z-coordinate for . O1 Check And 193 other PLAT163 Alerts More ...PLAT213_ALERT_2_C Atom O30 has ADP max/min Ratio ..... 3.4 prolat And 44 other PLAT213 Alerts More ...PLAT218_ALERT_3_C Constrained U(ij) Components(s) for O1 . 6 Check And 182 other PLAT218 Alerts More ...PLAT241_ALERT_2_C High 'MainMol' Ueq as Compared to Neighbors of O2 Check And 2 other PLAT241 Alerts More ...PLAT250_ALERT_2_C Large U3/U1 Ratio for Average U(i,j) Tensor .... 3.7 Note Alert level G PLAT004_ALERT_5_G Polymeric Structure Found with Maximum Dimension 3 Info PLAT005_ALERT_5_G No Embedded Refinement Details Found in the CIF Please Do ! PLAT040_ALERT_1_G No H-atoms in this Carbon Containing Compound .. Please Check PLAT045_ALERT_1_G Calculated and Reported Z Differ by a Factor ... 0.00 Check PLAT104_ALERT_1_G The Reported Crystal System is Inconsistent with P1 Check PLAT111_ALERT_2_G ADDSYM Detects New (Pseudo) Centre of Symmetry . 91 %Fit PLAT113_ALERT_2_G ADDSYM Suggests Possible Pseudo/New Space Group P-1 Check PLAT154_ALERT_1_G The s.u.'s on the Cell Angles are Equal ..(Note) 0. Degree PLAT300_ALERT_4_G Atom Site Occupancy of Tb141 Constrained at 0.33 Check And 5 other PLAT300 Alerts More ...PLAT301_ALERT_3_G Main Residue Disorder ..............(Resd 1 ) 1% Note PLAT395_ALERT_2_G Deviating X-O-Y Angle From 120 for O84 42.2 Degree PLAT720_ALERT_4_G Number of Unusual/Non-Standard Labels .......... 3 Note PLAT773_ALERT_2_G Check long C-C Bond in CIF: C5 --C8 1.71 Ang. And 5 other PLAT773 Alerts More ...PLAT808_ALERT_5_G No Parseable SHELXL Style Weighting Scheme Found Please Check PLAT882_ALERT_1_G No Datum for _diffrn_reflns_av_unetI/netI ...... Please Do ! PLAT981_ALERT_1_G No non-zero f" Anomalous Scattering Values Found Please Check PLAT986_ALERT_1_G No non-zero f' Anomalous Scattering Values Found Please Check 245 ALERT level A = Most likely a serious problem - resolve or explain 43 ALERT level B = A potentially serious problem, consider carefully 824 ALERT level C = Check. Ensure it is not caused by an omission or oversight 27 ALERT level G = General information/check it is not something unexpected 248 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 107 ALERT type 2 Indicator that the structure model may be wrong or deficient 185 ALERT type 3 Indicator that the structure quality may be low 596 ALERT type 4 Improvement, methodology, query or suggestion 3 ALERT type 5 Informative message, check checkCIF publication errors Alert level A PUBL004_ALERT_1_A The contact author's name and address are missing, _publ_contact_author_name and _publ_contact_author_address. PUBL005_ALERT_1_A _publ_contact_author_email, _publ_contact_author_fax and _publ_contact_author_phone are all missing. At least one of these should be present. PUBL006_ALERT_1_A _publ_requested_journal is missing e.g. 'Acta Crystallographica Section C' PUBL008_ALERT_1_A _publ_section_title is missing. Title of paper. PUBL009_ALERT_1_A _publ_author_name is missing. List of author(s) name(s). PUBL010_ALERT_1_A _publ_author_address is missing. Author(s) address(es). PUBL012_ALERT_1_A _publ_section_abstract is missing. Abstract of paper in English. PUBL016_ALERT_1_A Details of the refinement are missing. e.g. _publ_section_exptl_refinement _computing_data_collection _computing_cell_refinement , etc. ATOM001_ALERT_1_A _atom_type_scat_source is missing Reference to scattering factors applied. Alert level G PUBL017_ALERT_1_G The _publ_section_references section is missing or empty. 9 ALERT level A = Data missing that is essential or data in wrong format 1 ALERT level G = General alerts. Data that may be required is missing Publication of your CIF You should attempt to resolve as many as possible of the alerts in all categories. Often the minor alerts point to easily fixed oversights, errors and omissions in your CIF or refinement strategy, so attention to these fine details can be worthwhile. In order to resolve some of the more serious problems it may be necessary to carry out additional measurements or structure refinements. However, the nature of your study may justify the reported deviations from journal submission requirements and the more serious of these should be commented upon in the discussion or experimental section of a paper or in the "special_details" fields of the CIF. checkCIF was carefully designed to identify outliers and unusual parameters, but every test has its limitations and alerts that are not important in a particular case may appear. Conversely, the absence of alerts does not guarantee there are no aspects of the results needing attention. It is up to the individual to critically assess their own results and, if necessary, seek expert advice. If level A alerts remain, which you believe to be justified deviations, and you intend to submit this CIF for publication in a journal, you should additionally insert an explanation in your CIF using the Validation Reply Form (VRF) below. This will allow your explanation to be considered as part of the review process. # start Validation Reply Form _vrf_PUBL004_GLOBAL ; PROBLEM: The contact author's name and address are missing, RESPONSE: ... ; _vrf_PUBL005_GLOBAL ; PROBLEM: _publ_contact_author_email, _publ_contact_author_fax and RESPONSE: ... ; _vrf_PUBL006_GLOBAL ; PROBLEM: _publ_requested_journal is missing RESPONSE: ... ; _vrf_PUBL008_GLOBAL ; PROBLEM: _publ_section_title is missing. Title of paper. RESPONSE: ... ; _vrf_PUBL009_GLOBAL ; PROBLEM: _publ_author_name is missing. List of author(s) name(s). RESPONSE: ... ; _vrf_PUBL010_GLOBAL ; PROBLEM: _publ_author_address is missing. Author(s) address(es). RESPONSE: ... ; _vrf_PUBL012_GLOBAL ; PROBLEM: _publ_section_abstract is missing. RESPONSE: ... ; _vrf_PUBL016_GLOBAL ; PROBLEM: Details of the refinement are missing. RESPONSE: ... ; _vrf_ATOM001_GLOBAL ; PROBLEM: _atom_type_scat_source is missing RESPONSE: ... ; _vrf_SYMM001_p6m_3 ; PROBLEM: _symmetry_cell_setting is missing RESPONSE: ... ; _vrf_CELL002_p6m_3 ; PROBLEM: _cell_formula_units_Z is missing RESPONSE: ... ; _vrf_EXPT001_p6m_3 ; PROBLEM: _exptl_crystal_density_diffrn is missing RESPONSE: ... ; _vrf_DIFF001_p6m_3 ; PROBLEM: _diffrn_radiation_type is missing RESPONSE: ... ; _vrf_DIFF002_p6m_3 ; PROBLEM: _diffrn_radiation_wavelength is missing RESPONSE: ... ; _vrf_CELL003_p6m_3 ; PROBLEM: _cell_measurement_reflns_used is missing RESPONSE: ... ; _vrf_CELL004_p6m_3 ; PROBLEM: _cell_measurement_theta_min is missing RESPONSE: ... ; _vrf_CELL005_p6m_3 ; PROBLEM: _cell_measurement_theta_max is missing RESPONSE: ... ; _vrf_CELL006_p6m_3 ; PROBLEM: _cell_measurement_temperature is missing RESPONSE: ... ; _vrf_EXPT004_p6m_3 ; PROBLEM: _exptl_absorpt_coefficient_mu is missing RESPONSE: ... ; _vrf_EXPT005_p6m_3 ; PROBLEM: _exptl_crystal_description is missing RESPONSE: ... ; _vrf_EXPT009_p6m_3 ; PROBLEM: No crystal dimensions have been given. RESPONSE: ... ; _vrf_EXPT108_p6m_3 ; PROBLEM: The magnitudes of the crystal dimensions do not RESPONSE: ... ; _vrf_EXPT010_p6m_3 ; PROBLEM: _exptl_crystal_colour (_pd_char_colour for powder) is missing RESPONSE: ... ; _vrf_DIFF003_p6m_3 ; PROBLEM: _diffrn_measurement_device_type is missing RESPONSE: ... ; _vrf_DIFF005_p6m_3 ; PROBLEM: _diffrn_measurement_method is missing RESPONSE: ... ; _vrf_DIFF007_p6m_3 ; PROBLEM: _diffrn_reflns_number is missing RESPONSE: ... ; _vrf_REFL001_p6m_3 ; PROBLEM: _reflns_number_total is missing RESPONSE: ... ; _vrf_REFL002_p6m_3 ; PROBLEM: _reflns_number_gt is missing RESPONSE: ... ; _vrf_REFL004_p6m_3 ; PROBLEM: _reflns_threshold_expression is missing RESPONSE: ... ; _vrf_DIFF008_p6m_3 ; PROBLEM: _diffrn_reflns_theta_max is missing RESPONSE: ... ; _vrf_DIFF013_p6m_3 ; PROBLEM: _diffrn_reflns_limit_h_min is missing RESPONSE: ... ; _vrf_DIFF014_p6m_3 ; PROBLEM: _diffrn_reflns_limit_h_max is missing RESPONSE: ... ; _vrf_DIFF015_p6m_3 ; PROBLEM: _diffrn_reflns_limit_k_min is missing RESPONSE: ... ; _vrf_DIFF016_p6m_3 ; PROBLEM: _diffrn_reflns_limit_k_max is missing RESPONSE: ... ; _vrf_DIFF017_p6m_3 ; PROBLEM: _diffrn_reflns_limit_l_min is missing RESPONSE: ... ; _vrf_DIFF018_p6m_3 ; PROBLEM: _diffrn_reflns_limit_l_max is missing RESPONSE: ... ; _vrf_DIFF019_p6m_3 ; PROBLEM: _diffrn_standards_number is missing RESPONSE: ... ; _vrf_DIFF020_p6m_3 ; PROBLEM: _diffrn_standards_interval_count and RESPONSE: ... ; _vrf_DIFF022_p6m_3 ; PROBLEM: _diffrn_standards_decay_% is missing RESPONSE: ... ; _vrf_REFI001_p6m_3 ; PROBLEM: _refine_ls_structure_factor_coef is missing RESPONSE: ... ; _vrf_REFI003_p6m_3 ; PROBLEM: _refine_ls_R_factor_gt is missing RESPONSE: ... ; _vrf_REFI005_p6m_3 ; PROBLEM: _refine_ls_wR_factor_ref is missing RESPONSE: ... ; _vrf_REFI007_p6m_3 ; PROBLEM: _refine_ls_goodness_of_fit_ref is missing RESPONSE: ... ; _vrf_REFI009_p6m_3 ; PROBLEM: _refine_ls_number_reflns is missing RESPONSE: ... ; _vrf_REFI010_p6m_3 ; PROBLEM: _refine_ls_number_parameters is missing RESPONSE: ... ; _vrf_REFI011_p6m_3 ; PROBLEM: _refine_ls_weighting_scheme is missing RESPONSE: ... ; _vrf_REFI015_p6m_3 ; PROBLEM: _refine_ls_shift/su_max is missing RESPONSE: ... ; _vrf_REFI017_p6m_3 ; PROBLEM: _refine_diff_density_max is missing RESPONSE: ... ; _vrf_REFI018_p6m_3 ; PROBLEM: _refine_diff_density_min is missing RESPONSE: ... ; _vrf_GEOM006_p6m_3 ; PROBLEM: _geom_angle_atom_site_label_2 is missing RESPONSE: ... ; _vrf_GEOM007_p6m_3 ; PROBLEM: _geom_angle_atom_site_label_3 is missing RESPONSE: ... ; _vrf_ABSTY01_p6m_3 ; PROBLEM: The absorption correction should be one of the following RESPONSE: ... ; _vrf_PLAT029_p6m_3 ; PROBLEM: _diffrn_measured_fraction_theta_full value Low . 0.000 Why? RESPONSE: ... ; _vrf_PLAT043_p6m_3 ; PROBLEM: Calculated and Reported Mol. Weight Differ by .. 2724.25 Check RESPONSE: ... ; _vrf_PLAT044_p6m_3 ; PROBLEM: Calculated and Reported Density Dx Differ by .. 1.0961 Check RESPONSE: ... ; _vrf_PLAT050_p6m_3 ; PROBLEM: Absorption Coefficient mu Not Given ............ Please Do ! RESPONSE: ... ; _vrf_PLAT086_p6m_3 ; PROBLEM: Unsatisfactory S Value (Too Low or Not Given) .. 0.00 Check RESPONSE: ... ; _vrf_PLAT091_p6m_3 ; PROBLEM: No Wavelength Found in CIF - 0.71073 Ang Assumed Please Check RESPONSE: ... ; _vrf_PLAT183_p6m_3 ; PROBLEM: Missing _cell_measurement_reflns_used Value .... Please Do ! RESPONSE: ... ; _vrf_PLAT184_p6m_3 ; PROBLEM: Missing _cell_measurement_theta_min Value ...... Please Do ! RESPONSE: ... ; _vrf_PLAT185_p6m_3 ; PROBLEM: Missing _cell_measurement_theta_max Value ...... Please Do ! RESPONSE: ... ; _vrf_PLAT197_p6m_3 ; PROBLEM: Missing _cell_measurement_temperature Datum .... Please Add RESPONSE: ... ; _vrf_PLAT198_p6m_3 ; PROBLEM: Missing _diffrn_ambient_temperature Datum .... Please Add RESPONSE: ... ; _vrf_PLAT224_p6m_3 ; PROBLEM: Ueq(Rep) and Ueq(Calc) Differ by -0.027 Ang**2 Tb141 Chec RESPONSE: ... ; _vrf_PLAT241_p6m_3 ; PROBLEM: High 'MainMol' Ueq as Compared to Neighbors of C27 Check RESPONSE: ... ; _vrf_PLAT260_p6m_3 ; PROBLEM: Large Average Ueq of Residue Including TB1# 0.484 Check RESPONSE: ... ; _vrf_PLAT602_p6m_3 ; PROBLEM: VERY LARGE Solvent Accessible VOID(S) in Structure ! Info RESPONSE: ... ; _vrf_PLAT880_p6m_3 ; PROBLEM: N0 datum for _diffrn_reflns_number ............. Please Do ! RESPONSE: ... ; _vrf_PLAT881_p6m_3 ; PROBLEM: No Datum for _diffrn_reflns_av_R_equivalents ... Please Do ! RESPONSE: ... ; # end Validation Reply Form查看更多 14个回答 . 11人已关注
洗衣液行标? 国标活性物15,行标各地是什么概念?10个? 查看更多 2个回答 . 2人已关注
1,6-己二胺? 1,6-己二胺买回来就凝结成块,跟瓶子长在一起,其熔点在39~42摄氏度。我加热将其熔化后得到液体。接着在60的条件下与乙二醛反应,我一滴加乙二醛就有白色固体形成,我想问下朋友们,这个白色固体是己二胺遇冷凝结还是就是二胺与二醛的产物还是说加热熔化后的己二胺变质了 查看更多 1个回答 . 7人已关注
请教文献里的原子力显微镜图怎么看? 这个是DNA大分子的原子力显微镜的,主要想知道从图c能看出什么信息呢?右边的标尺是什么意思呀 截屏2020-10-09 10.23.58.png查看更多 1个回答 . 1人已关注
唠唠嗑吧? 你们的导师是怎么指导你们的?我现在已经博三了,在投文章,但是我的导师什么都不管,文章不看,我自己改了几遍就投了,回来的审稿意见也不看,而且之前他改过一次文章,但是都给我改错了,我想问一下这是现在老师的常态么?我已经要怀疑人生了, 查看更多 1个回答 . 19人已关注
第一次测超级电容器CV曲线为什么是这样的,不是准矩形?感觉和文献里面的相差好大? 查看更多 5个回答 . 12人已关注
请教莽草酸发酵液中小分子杂质的去除? 目前正在做大肠杆菌发酵表达的莽草酸分离纯化,面临一个问题:发酵液中存在与莽草酸性质相似的杂质比较难以去除,这种杂质有如下性质:1)极易吸水、粘稠(①用乙醇反相结晶有絮状沉淀出现,沉淀真空干燥后拿出来后极易吸潮,粘成一团;②料液真空干燥喷雾干燥粘壁严重);2)与莽草酸性质相似,水溶性极好,能够结合阴离子树脂,且会与莽草酸一起洗脱下来;3)在紫外210nm处没有吸光值,我们纯化后样品用HPLC 210nm紫外检测器检测,杂质峰少,但纯度低,因此确定该杂质在210nm处无吸光值;4)确定该类杂质为小分子杂质,我们的料液用250 分子量的纳滤膜过滤过,因此此类杂质应该不属于大分子多糖或蛋白类杂质;5)确定该杂质并非奎尼酸与脱氢莽草酸,我们用奎尼酸和脱氢莽草酸标准品对比验证过。请教一下做过莽草酸的前辈,帮我分析一下这类是什么杂质?该怎么去除?查看更多 2个回答 . 18人已关注
C18反相硅胶哪里有卖的? 需要用反相C18硅胶分离化合物,有没有用过的老哥告诉一下哪里有卖的?网上没有搜到 查看更多 9个回答 . 15人已关注
AZ9260的刻蚀比? 本人新手,想要做ICP刻蚀硅的实验,刻蚀深度在15微米,老师说刻蚀的比较厚,推荐用AZ9260,但是不知道他的刻蚀比多少,我应该旋胶旋多厚呢,求助查看更多 2个回答 . 4人已关注
求助大家菌落计数cfu/ml是怎么计算的? 查阅文献计算浓度,但是不明白人家的文献中是怎么计算出来的,0.5麦氏浊度就是1.5??10的八次方cfu/ml,那么稀释十倍之后怎么就变成5?? 10的五次方cfu/ml了呢,求助大家帮忙讲解一下这个换算是怎么进行的(文献截图如下),谢谢大家了 查看更多 4个回答 . 19人已关注
哪里可以买到碳纳米管阵列? 50微米高,Si/电极层/碳纳米管阵列,直接生长或转移均可,3-10层管壁,1cm*1cm面积,我自己的衬底,电极层非常平整(ALD生长)。各位大佬哪里可以买到,谢了!查看更多 1个回答 . 4人已关注
基础无机? 突然不是很明白为什么减少CO2分压无用?CO2分压减少,反应不是向右移动吗? 查看更多 2个回答 . 1人已关注
聚合物电解质膜组装成对锂电池测试? 聚合物电解质膜组装成对锂电池进行测试,先是在0.02mA/cm的电流密度下循环下,对锂电池在100圈左右有一点极化电压过大,之后又变正常(稳定在0.02V左右);接着分别在0.05、0.1和0.2mA/cm的电流密度下测试极化电压也很稳定(在0.05mA/cm下稳压在0.05V左右)。问题一是这种情况下,这个测试数据还能用吗?能用的话 怎么解释前面极化电压过大后面又趋于稳定呢?图二是细节展示,从开始到测试结束每圈的循环图都这这样子;问题二这样的循环曲线合理吗?图三为文献图(侵权删),对比文献看图一(如果没有前面极化电压过大的部分)跟文献一直,但是图二的细节图与文献有所不同。对锂电池测试前静置和不静置都会出现上图情况,以后测试该怎么注意。 查看更多 1个回答 . 15人已关注
求助高锰酸钾氧化甲基为羧基的反应条件? 本人最近在做一个高锰酸钾氧化甲基为羧基的反应,原先用高锰酸钾水溶液加热80°C直接氧化,但原料2-溴-5-咔唑甲苯不能溶于水,漂浮在液面上,不能反应,加入碱液也不行。后来用吡啶溶解原料,用水溶解高锰酸钾,将溶液混匀加热,高锰酸钾很快被消耗,仅有少量原料被氧化,不断投入过量高锰酸钾也不能改善反应,产物收率不到10%。在此想请教各位大神这种情况下的反应条件选择。希望能给出高锰酸钾当量、溶剂、添加剂以及温度的具体条件,不胜感激。 untitled - 副本 - 副本 - 副本.jpg查看更多 6个回答 . 9人已关注
化工厂工作体验? 在化工厂工作的感觉怎么样呢?我明年就要毕业了。查看更多 1个回答 . 10人已关注
高相液相流动相的水? 目前,实验室的超纯水机坏掉了,实验又着急做。在各大商场和超市没有找到“哇哈哈”牌子的纯净水,有的只是银鹭纯净水,请问可以用吗?也有屈臣氏饮用水(蒸馏法制得)可以用吗? 在线等,急。谢谢各位朋友!! 查看更多 4个回答 . 17人已关注
CH4-TPSR,质谱,求合作。? 各位高手,现在我想做甲烷的程序升温表面反应(CH4-TPSR),请问那个课题组有质谱,可以合作,或付费即可。求 推荐一下。查看更多 3个回答 . 6人已关注
咔唑用NBS上溴? 咔唑N上是乙基,3位上有醛基,想在6位上溴。按文献上讲的,NBS 用了1.05当量,乙酸和三氯=1:2,为什么上不去溴? 查看更多 4个回答 . 3人已关注
简介
职业:福建省三明辉润石化有限公司 - 研发员
学校:咸阳师范学院 - 化学系
地区:辽宁省
个人简介:成功的秘诀,在永不改变既定的目的。查看更多
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